/* Root Variables */
:root {
    --primary-color: #1DB954;
    --secondary-color: #191414;
    --accent-color: #FF6B6B;
    --bg-main: #121212;
    --bg-secondary: #181818;
    --bg-card: #282828;
    --text-primary: #FFFFFF;
    --text-secondary: #B3B3B3;
    --border-color: #404040;
    --shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
    --primary-color: #1DB954;
    --secondary-color: #FFFFFF;
    --accent-color: #E91E63;
    --bg-main: #F5F5F5;
    --bg-secondary: #FFFFFF;
    --bg-card: #FFFFFF;
    --text-primary: #000000;
    --text-secondary: #757575;
    --border-color: #E0E0E0;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.6;
    transition: var(--transition);
    overflow: hidden;
    height: 100vh;
    padding-bottom: 60px;
}

@media (max-width: 768px) {
    body {
        padding-bottom: 55px;
    }
}

@media (max-width: 480px) {
    body {
        padding-bottom: 50px;
    }
}

/* Enable scroll on pages with main-content (non-landing pages) */
body.has-main-content {
    overflow: auto;
    height: auto;
    padding-bottom: 0;
}

/* Landing Header */
.landing-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 70px;
    background: rgba(18, 18, 18, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 2px solid rgba(29, 185, 84, 0.5);
    z-index: 1000;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

.header-container {
    max-width: 100%;
    height: 100%;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header-logo {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    font-size: 1.2rem;
    font-weight: 700;
    color: #FFFFFF;
    text-decoration: none;
    cursor: pointer;
}

.header-logo i {
    font-size: 1.8rem;
    color: #1DB954;
    animation: spin 8s linear infinite;
}

.header-login-btn {
    padding: 0.6rem 1.5rem;
    background: linear-gradient(135deg, #1DB954, #1ed760);
    color: white;
    border: none;
    border-radius: 25px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: 0 4px 15px rgba(29, 185, 84, 0.3);
}

.header-login-btn:hover {
    background: linear-gradient(135deg, #1ed760, #1DB954);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(29, 185, 84, 0.5);
}

.header-login-btn:active {
    transform: translateY(0px);
}

@media (max-width: 768px) {
    .landing-header {
        height: 60px;
    }

    .header-container {
        padding: 0 1rem;
    }

    .header-logo {
        font-size: 1rem;
        gap: 0.5rem;
    }

    .header-logo i {
        font-size: 1.4rem;
    }

    .header-login-btn {
        padding: 0.5rem 1.2rem;
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .landing-header {
        height: 50px;
    }

    .header-container {
        padding: 0 0.75rem;
    }

    .header-logo {
        font-size: 0.85rem;
        gap: 0.3rem;
    }

    .header-logo i {
        font-size: 1.2rem;
    }

    .header-login-btn {
        padding: 0.4rem 0.9rem;
        font-size: 0.75rem;
        gap: 0.3rem;
    }

    .header-login-btn i {
        font-size: 0.9rem;
    }
}

/* Landing Footer */
.landing-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 60px;
    background: rgba(18, 18, 18, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 2px solid rgba(29, 185, 84, 0.5);
    z-index: 1000;
    box-shadow: 0 -8px 32px rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: flex-start;
}

.footer-container {
    width: 100%;
    height: 100%;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: flex-start;
}

.footer-content {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1.1rem;
    font-weight: 700;
    color: #FFFFFF;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    white-space: nowrap;
    margin: 0;
    padding: 0;
}

.footer-content i {
    font-size: 1.8rem;
    color: #1DB954;
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    flex-shrink: 0;
}

.footer-content:hover {
    transform: translateY(-2px);
}

.footer-content:hover i {
    color: #1ed760;
    transform: scale(1.1);
}

.footer-content:hover span {
    color: #1ed760;
}

/* Tablet devices (768px and below) */
@media (max-width: 768px) {
    .landing-footer {
        height: 55px;
    }

    .footer-container {
        padding: 0 1.5rem;
    }

    .footer-content {
        font-size: 0.95rem;
        gap: 0.7rem;
    }

    .footer-content i {
        font-size: 1.5rem;
    }
}

/* Mobile devices (480px and below) */
@media (max-width: 480px) {
    .landing-footer {
        height: 50px;
        padding: 0 0.5rem;
    }

    .footer-container {
        padding: 0 0.75rem;
    }

    .footer-content {
        font-size: 0.8rem;
        gap: 0.5rem;
    }

    .footer-content i {
        font-size: 1.2rem;
    }

    .footer-content span {
        display: inline;
    }
}

/* Ultra small devices (380px and below) */
/* Landing Page - adjust for header */
.landing-page {
    height: calc(100vh - 130px);
    margin-top: 70px;
    margin-bottom: 0;
    display: flex;
    align-items: stretch;
    justify-content: flex-start;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #b6bac1 0%, #17d38c 50%, #94e3b0 100%);
}

.landing-left {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    padding: 2rem;
    z-index: 2;
    position: relative;
}

.landing-cards-right {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding: 2rem;
    z-index: 2;
    position: relative;
}

.landing-content {
    text-align: left;
    z-index: 1;
    padding: 2rem;
    max-width: 600px;
}

.landing-title {
    font-size: 3.5rem;
    font-weight: 900;
    color: #000000;
    line-height: 1.2;
    margin-bottom: 2rem;
    text-transform: capitalize;
}

.landing-title .highlight {
    color: #FFFFFF;
}

/* Desktop 1024px and above */
@media (min-width: 1025px) {
    .landing-page {
        height: calc(100vh - 130px);
    }
}

/* Tablet 768px to 1024px */
@media (max-width: 1024px) {
    .landing-page {
        height: auto;
        min-height: calc(100vh - 115px);
    }

    .landing-left {
        flex: 0 1 auto;
        padding: 1.5rem 1rem;
    }

    .landing-cards-right {
        flex: 0 1 auto;
        padding: 1.5rem 1rem;
    }

    .landing-content {
        padding: 1.5rem;
    }

    .landing-title {
        font-size: 2.5rem;
        margin-bottom: 1.5rem;
    }
}

/* Medium Tablet 768px to 1024px */
@media (max-width: 768px) {
    .landing-page {
        flex-direction: column;
        height: auto;
        min-height: auto;
        padding: 0;
        margin-top: 60px;
        margin-bottom: 0;
    }

    .landing-left {
        flex: 0 1 auto;
        padding: 1.5rem 1rem;
        justify-content: center;
        align-items: center;
        min-height: auto;
        width: 100%;
        order: 1;
    }

    .landing-cards-right {
        flex: 0 1 auto;
        padding: 1rem;
        justify-content: center;
        align-items: center;
        width: 100%;
        max-height: none;
        order: 2;
    }

    .landing-content {
        text-align: center;
        padding: 1rem 0.5rem;
        max-width: 100%;
    }

    .landing-title {
        font-size: 1.8rem;
        margin-bottom: 1rem;
        line-height: 1.2;
        font-weight: 800;
    }
}

/* Mobile 480px to 768px */
@media (max-width: 480px) {
    .landing-page {
        margin-top: 50px;
        margin-bottom: 0;
        height: auto;
        padding: 0;
        flex-direction: column;
    }

    body {
        padding-bottom: 50px;
    }

    .landing-left {
        flex: 0 1 auto;
        padding: 0.75rem 0.75rem;
        justify-content: center;
        align-items: center;
        width: 100%;
        order: 1;
        min-height: auto;
    }

    .landing-cards-right {
        flex: 0 1 auto;
        padding: 0.75rem;
        justify-content: center;
        align-items: center;
        width: 100%;
        max-height: none;
        order: 2;
    }

    .landing-content {
        text-align: center;
        padding: 0.5rem;
        max-width: 100%;
    }

    .landing-title {
        font-size: 1.3rem;
        margin-bottom: 0.6rem;
        line-height: 1.15;
        font-weight: 800;
    }
}

/* Student Cards Container */
.student-cards-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    width: 100%;
    max-width: 100%;
    max-height: calc(100vh - 180px);
    overflow: hidden;
    padding: 0 12px 12px 12px;
    scroll-behavior: smooth;
    mask-image: linear-gradient(to bottom, 
        transparent 0%, 
        black 3%, 
        black 97%, 
        transparent 100%);
    -webkit-mask-image: linear-gradient(to bottom, 
        transparent 0%, 
        black 3%, 
        black 97%, 
        transparent 100%);
    position: relative;
    transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 1;
}

@media (max-width: 768px) {
    .student-cards-container {
        max-width: 100%;
        width: 100%;
        gap: 0.8rem;
        padding: 0 8px 8px 8px;
        max-height: none;
        overflow-y: visible;
        mask-image: none;
        -webkit-mask-image: none;
    }
}

@media (max-width: 480px) {
    .student-cards-container {
        gap: 0.6rem;
        padding: 0 6px 6px 6px;
        max-height: none;
        width: 100%;
        overflow-y: visible;
        mask-image: none;
        -webkit-mask-image: none;
    }
}

/* Hide scrollbar completely */
.student-cards-container::-webkit-scrollbar {
    display: none;
}

/* Card Styles */
.card {
    width: 100%;
    max-width: 100%;
    height: 140px;
    background: rgb(28 29 29);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    backdrop-filter: blur(10px);
    transition: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
    border: 1px solid rgba(29, 185, 84, 0.2);
    box-shadow: 0 10px 12px rgba(0, 0, 0, 0.3);
    padding: 18px;
}

@media (max-width: 768px) {
    .card {
        max-width: 100%;
        height: 110px;
        padding: 12px;
        flex-shrink: 0;
    }
    
    .img {
        width: 80px;
        height: 80px;
        margin-right: 10px;
        border-radius: 12px;
        min-width: 80px;
        font-size: 20px;
    }
    
    .textBox {
        gap: 4px;
    }

    .student-cards-container {
        max-width: 100%;
        width: 100%;
        gap: 0.8rem;
        padding: 0 8px 8px 8px;
        max-height: none;
        overflow-y: visible;
    }
}

@media (max-width: 480px) {
    .card {
        height: 100px;
        padding: 10px;
        width: 100%;
        border-radius: 15px;
    }
    
    .img {
        width: 70px;
        height: 70px;
        margin-right: 8px;
        border-radius: 10px;
        min-width: 70px;
        font-size: 18px;
    }
    
    .textBox {
        gap: 3px;
    }

    .student-cards-container {
        gap: 0.6rem;
        padding: 0 6px 6px 6px;
        max-height: none;
        width: 100%;
        overflow-y: visible;
    }
}

.card:hover {
    cursor: pointer;
    cursor: pointer;
    transform: scale(1.05);
    border-color: rgba(29, 185, 84, 0.5);
    box-shadow: 0 8px 25px rgba(29, 185, 84, 0.3);
}

.img {
    width: 100px;
    height: 100px;
    margin-right: 18px;
    border-radius: 18px;
    background: linear-gradient(#085078, #85d8ce);
    flex-shrink: 0;
    transition: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    font-size: 28px;
    color: white;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

@media (max-width: 768px) {
    .img {
        width: 80px;
        height: 80px;
        margin-right: 10px;
        border-radius: 12px;
        min-width: 80px;
        font-size: 20px;
    }
}

@media (max-width: 480px) {
    .img {
        width: 70px;
        height: 70px;
        margin-right: 8px;
        border-radius: 10px;
        min-width: 70px;
        font-size: 18px;
    }
}

.card:hover > .img {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(29, 185, 84, 0.4);
}

.textBox {
    flex: 1;
    color: white;
    font-family: 'Poppins', sans-serif;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
}

.textContent {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.span {
    font-size: 12px;
    color: #1DB954;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
    flex-shrink: 0;
}

.h1 {
    font-size: 20px;
    font-weight: bold;
    color: #FFFFFF;
    line-height: 1.3;
    max-width: 100%;
    word-wrap: break-word;
    overflow-wrap: break-word;
    hyphens: auto;
}

.p {
    font-size: 14px;
    font-weight: 500;
    color: #B3B3B3;
    margin-top: 0;
    line-height: 1.3;
}

@media (max-width: 768px) {
    .landing-title {
        font-size: 1.8rem;
    }

    .h1 {
        font-size: 16px;
        font-weight: 700;
    }
    
    .span {
        font-size: 11px;
    }
    
    .p {
        font-size: 12px;
    }

    .cta-buttons {
        justify-content: center;
        gap: 1rem;
        width: 100%;
        flex-wrap: wrap;
    }

    .btn-primary {
        font-size: 14px;
        padding: 12px 28px;
        border-radius: 12px;
    }
}

@media (max-width: 480px) {
    .landing-title {
        font-size: 1.3rem;
    }

    .h1 {
        font-size: 14px;
        font-weight: 700;
    }
    
    .span {
        font-size: 10px;
    }
    
    .p {
        font-size: 11px;
    }

    .cta-buttons {
        gap: 0.5rem;
        width: 100%;
        justify-content: center;
    }

    .btn-primary {
        font-size: 12px;
        padding: 8px 20px;
        border-radius: 8px;
    }
}

/* Blob Shapes */
.blob-shapes {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
}

.blob {
    position: absolute;
    border-radius: 40% 60% 70% 30% / 40% 50% 60% 50%;
    opacity: 0.7;
    animation: blobAnimation 8s infinite ease-in-out;
}

.blob-1 {
    width: 300px;
    height: 300px;
    background: rgba(29, 185, 84, 0.3);
    top: -50px;
    right: -50px;
    animation-delay: 0s;
}

.blob-2 {
    width: 200px;
    height: 200px;
    background: rgba(255, 107, 107, 0.2);
    bottom: 100px;
    right: 50px;
    animation-delay: 2s;
}

.blob-3 {
    width: 250px;
    height: 250px;
    background: rgba(29, 185, 84, 0.25);
    bottom: -50px;
    left: -50px;
    animation-delay: 4s;
}

@keyframes blobAnimation {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    25% {
        transform: translate(30px, -50px) scale(1.1);
    }
    50% {
        transform: translate(-20px, 20px) scale(0.9);
    }
    75% {
        transform: translate(50px, 50px) scale(1.05);
    }
}

.cta-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: flex-start;
    flex-wrap: wrap;
}

@media (max-width: 768px) {
    .cta-buttons {
        justify-content: center;
    }
}

.btn-primary, .btn-secondary {
    padding: 1rem 2.5rem;
    font-size: 1rem;
    font-weight: 700;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-transform: capitalize;
}

.btn-primary {
    background: #000000;
    color: white;
}

.btn-primary:hover {
    background: #333333;
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

@media (max-width: 768px) {
    .btn-primary, .btn-secondary {
        padding: 0.9rem 2rem;
        font-size: 0.95rem;
        border-radius: 10px;
    }
}

@media (max-width: 480px) {
    .btn-primary, .btn-secondary {
        padding: 0.85rem 1.8rem;
        font-size: 0.85rem;
        border-radius: 8px;
        white-space: nowrap;
    }
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: white;
    color: #000000;
    transform: translateY(-3px);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
}

.modal-content {
    background: var(--bg-card);
    margin: 5% auto;
    padding: 2rem;
    border-radius: 20px;
    max-width: 500px;
    position: relative;
    animation: slideDown 0.3s ease;
    box-shadow: var(--shadow);
}

@keyframes slideDown {
    from { transform: translateY(-50px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.modal-large {
    max-width: 900px;
}

@media (max-width: 768px) {
    .modal-content {
        margin: 10% auto;
        padding: 1.5rem;
        max-width: 95%;
        border-radius: 15px;
    }
    
    .modal-large {
        max-width: 95%;
    }
}

.close {
    position: absolute;
    right: 20px;
    top: 20px;
    font-size: 28px;
    font-weight: bold;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.close:hover {
    color: var(--text-primary);
    transform: rotate(90deg);
}

.modal-header {
    text-align: center;
    margin-bottom: 2rem;
}

.modal-header i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.modal-header h2 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

/* Login Tabs */
.login-tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.tab-btn {
    flex: 1;
    padding: 1rem;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.tab-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.tab-btn:hover:not(.active) {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.8rem 1rem;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(29, 185, 84, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* Audio Section Styles */
.audio-section {
    margin-top: 2rem;
}

.audio-input-group {
    width: 100%;
}

.audio-player-preview {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
}

.audio-player-preview audio {
    background: var(--bg-main);
    border-radius: 8px;
}

.audio-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.audio-tab-btn {
    flex: 1;
    padding: 0.8rem;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    border-bottom: 3px solid transparent;
    margin-bottom: -2px;
}

.audio-tab-btn:hover {
    color: var(--text-primary);
}

.audio-tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.audio-tab-content {
    display: none;
    animation: slideDown 0.3s ease;
}

.audio-tab-content.active {
    display: block;
}

.form-input-url {
    width: 100%;
    padding: 0.8rem 1rem;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    margin-bottom: 0.8rem;
    transition: var(--transition);
}

.form-input-url:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(29, 185, 84, 0.1);
}

.audio-input-options {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
}

.help-text {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

.btn-small {
    padding: 0.6rem 1.2rem;
    font-size: 0.95rem;
}

.btn-danger {
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
}

.btn-danger:hover {
    background: #ff5555;
    transform: translateY(-2px);
}

.btn-submit, .btn-save, .btn-upload {
    width: 100%;
    padding: 1rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-submit:hover, .btn-save:hover, .btn-upload:hover {
    background: #1ed760;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(29, 185, 84, 0.3);
}

/* Header */
.music-header {
    background: var(--bg-secondary);
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
    opacity: 1 !important;
    visibility: visible !important;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1.5rem;
    opacity: 1 !important;
    visibility: visible !important;
}

.header-left i {
    color: var(--primary-color);
    font-size: 2rem;
}

@media (max-width: 480px) {
    .header-left {
        gap: 0.5rem;
        font-size: 1rem;
    }
    
    .header-left i {
        font-size: 1.5rem;
    }
}

.spinning-slow {
    animation: spin 8s linear infinite;
}

.header-title {
    font-weight: 700;
    color: var(--text-primary);
}

.header-nav {
    display: flex;
    gap: 2rem;
    opacity: 1 !important;
    visibility: visible !important;
}

.header-nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.header-nav a:hover,
.header-nav a.active {
    color: var(--primary-color);
}

.sidebar-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    transition: var(--transition);
}

.sidebar-toggle:hover {
    color: var(--primary-color);
}

/* Mobile Sidebar Navigation */
.sidebar-nav {
    display: flex;
    position: fixed;
    left: 0;
    top: 0;
    width: 280px;
    height: 100vh;
    background: var(--bg-secondary);
    z-index: 1999;
    flex-direction: column;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.3);
    transform: translateX(-100%);
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: transform;
    backface-visibility: hidden;
    pointer-events: auto;
}

.sidebar-nav.active {
    transform: translateX(0);
    pointer-events: auto;
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 1rem;
    position: relative;
}

.sidebar-header i {
    color: var(--primary-color);
    font-size: 1.8rem;
}

.sidebar-header span {
    font-weight: 700;
    font-size: 1.1rem;
    flex: 1;
}

.sidebar-close {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.sidebar-close:hover {
    color: var(--accent-color);
    transform: rotate(90deg);
}

/* Sidebar animations */
@keyframes slideInSidebar {
    from {
        transform: translateX(-100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOutSidebar {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(-100%);
        opacity: 0;
    }
}

.sidebar-menu {
    flex: 1;
    padding: 1rem 0;
    display: flex;
    flex-direction: column;
    gap: 0;
    pointer-events: auto;
}

.sidebar-item {
    padding: 1rem 1.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: var(--transition);
    border-left: 3px solid transparent;
    opacity: 1 !important;
    cursor: pointer;
    pointer-events: auto;
    user-select: none;
    -webkit-user-select: none;
}

.sidebar-item:hover {
    background: var(--bg-main);
    color: var(--text-primary);
}

.sidebar-item.active {
    background: var(--bg-main);
    color: var(--primary-color);
    border-left-color: var(--primary-color);
}

.sidebar-item i {
    font-size: 1.2rem;
    width: 24px;
    text-align: center;
    pointer-events: auto;
}

.sidebar-item span {
    pointer-events: auto;
}

.sidebar-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
}

.sidebar-theme-btn {
    width: 100%;
    padding: 0.8rem;
    background: var(--bg-main);
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-weight: 600;
    transition: var(--transition);
}

.sidebar-theme-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1998;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.35s cubic-bezier(0.4, 0, 0.2, 1), visibility 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
    will-change: opacity, visibility;
}

.sidebar-overlay.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

/* Mobile Header */
@media (max-width: 768px) {
    .music-header {
        padding: 1rem;
        gap: 0.5rem;
        flex-wrap: nowrap;
    }
    
    .sidebar-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
        order: -1;
    }
    
    .header-left {
        gap: 0.75rem;
        font-size: 1rem;
        flex: 1;
    }
    
    .header-left i {
        font-size: 1.5rem;
    }
    
    .header-title {
        font-size: 1rem;
    }
    
    .header-nav {
        display: none;
    }
    
    .header-right {
        gap: 0.5rem;
    }
    
    .theme-btn, .user-btn {
        padding: 0.4rem 0.8rem;
        font-size: 0.85rem;
        border-radius: 15px;
    }
    
    .theme-btn i, .user-btn i {
        font-size: 1rem;
    }
    
    .sidebar-nav {
        display: flex;
    }
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
    opacity: 1 !important;
    visibility: visible !important;
}

.theme-btn, .user-btn, .logout-btn {
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    opacity: 1 !important;
    visibility: visible !important;
}

.theme-btn:hover, .user-btn:hover, .logout-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* Main Content */
.main-content {
    min-height: calc(100vh - 160px);
    padding: 2rem;
}

@media (max-width: 768px) {
    .main-content {
        min-height: calc(100vh - 120px);
        padding: 1.5rem 1rem;
    }
}

@media (max-width: 480px) {
    .main-content {
        padding: 1rem 0.75rem;
    }
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

@media (max-width: 768px) {
    .container {
        max-width: 100%;
    }
}

.page-header {
    text-align: center;
    margin-bottom: 3rem;
    opacity: 1 !important;
    visibility: visible !important;
}

.page-header h1 {
    font-size: 3rem;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    opacity: 1 !important;
    visibility: visible !important;
}

.page-header p {
    color: var(--text-secondary);
    font-size: 1.2rem;
    opacity: 1 !important;
    visibility: visible !important;
}

@media (max-width: 768px) {
    .page-header {
        margin-bottom: 2rem;
    }
    
    .page-header h1 {
        font-size: 1.8rem;
        gap: 0.5rem;
    }
    
    .page-header p {
        font-size: 1rem;
    }
}

/* Music Player Interface */
.music-player-container {
    position: relative;
    margin-bottom: 3rem;
    opacity: 1;
    visibility: visible;
}

/* Closing animation state */
.music-player-container.closing {
    /* Animation handled by GSAP */
}

/* Profile changing animation state */
.music-player-container.profile-changing {
    /* Animation handled by GSAP */
}

@keyframes slideInPlayerSmooth {
    from {
        opacity: 0;
        transform: translateY(-40px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes slideDown {
    from {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
    to {
        opacity: 0;
        transform: translateY(100%) scale(0.95);
    }
}

@keyframes slideDownDesktop {
    from {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
    to {
        opacity: 0;
        transform: translateY(-50px) scale(0.95);
    }
}

@keyframes albumBounce {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.02);
    }
}

/* Mobile Fullscreen Music Player */
@media (max-width: 768px) {
    .music-player-container {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        width: 100%;
        height: 100vh;
        z-index: 2000;
        margin-bottom: 0;
        background: var(--bg-main);
        display: flex;
        flex-direction: column;
        padding: 0;
        border-radius: 0;
    }
    
    /* Mobile closing animation */
    .music-player-container.closing {
        /* Animation handled by GSAP */
    }
}

.close-player {
    position: fixed;
    top: 1rem;
    right: 1rem;
    width: 40px;
    height: 40px;
    background: rgba(0, 0, 0, 0.5);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 5001;
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    backdrop-filter: blur(10px);
    will-change: transform, background, border-color;
}

.close-player:hover {
    background: var(--accent-color);
    border-color: var(--accent-color);
    transform: rotate(90deg) scale(1.1);
}

.close-player:active {
    transform: rotate(90deg) scale(0.95);
}

@media (max-width: 768px) {
    .close-player {
        width: 38px;
        height: 38px;
        top: 1.2rem;
        right: 1.2rem;
        font-size: 1.2rem;
    }
}

.music-player {
    background: var(--bg-main);
    border-radius: 0;
    padding: 0;
    box-shadow: none;
    border: none;
    display: flex;
    flex-direction: column;
    height: 100%;
    opacity: 1;
    visibility: visible;
}

/* Desktop Music Player Layout */
@media (min-width: 769px) {
    .music-player {
        flex-direction: row;
        flex-wrap: wrap;
        position: relative;
        display: flex;
        height: 100%;
    }
    
    .music-player-container {
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        max-width: 100%;
        margin: 0;
        z-index: 5000;
        border-radius: 0;
        background: var(--bg-main);
        display: flex;
        flex-direction: column;
    }
}

/* Player Top Section - Album Art */
.player-top-section {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 0;
    opacity: 1 !important;
    visibility: visible !important;
    transition: opacity 0.3s ease-out, transform 0.3s ease-out;
    transform: translate(0, 0) scale(1);
    transform-origin: center center;
    will-change: auto;
}

@media (min-width: 769px) {
    .player-top-section {
        flex: 0 0 420px;
        width: 420px;
        height: calc(100vh - 150px);
        padding: 2.5rem 1.5rem;
        justify-content: flex-start;
        align-items: flex-start;
        flex-direction: column;
        background: none;
        border-right: 2px solid var(--border-color);
        border-bottom: none;
        display: flex;
        gap: 1.5rem;
        overflow: hidden;
    }
}

.music-player-container.closing .player-top-section {
    opacity: 0;
    transform: translateY(-20px) scale(0.95);
}

@media (min-width: 769px) {
    .music-player-container.closing .player-top-section {
        transform: translateX(-20px) scale(0.95);
    }
}

.album-art-wrapper {
    width: 100%;
    max-width: 400px;
    aspect-ratio: 1;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    transform: translate(0, 0) scale(1);
    will-change: auto;
}

@media (min-width: 769px) {
    .album-art-wrapper {
        width: 320px;
        height: 320px;
        aspect-ratio: 1;
        margin: 0;
        padding: 0;
        display: flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
    }
}

.album-art {
    position: relative;
    width: 100%;
    height: 100%;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4);
    opacity: 1 !important;
    visibility: visible !important;
    transition: transform 0.4s ease-out;
    perspective: 1000px;
    transform: translate(0, 0) scale(1) rotateY(0deg);
    transform-origin: center center;
    will-change: auto;
}

.album-art img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Now Playing Badge */
.now-playing-badge {
    display: none;
    align-items: center;
    gap: 0.7rem;
    color: var(--primary-color);
    font-weight: 700;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
}

.now-playing-badge i {
    animation: musicPulse 1s ease-in-out infinite;
    font-size: 1.1rem;
}

@keyframes musicPulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.6;
    }
}

@media (min-width: 769px) {
    .now-playing-badge {
        display: flex;
        margin-bottom: 1rem;
    }
}

/* Mobile Top Section */
@media (max-width: 768px) {
    .player-top-section {
        flex: 0 0 auto;
        width: 100%;
        height: auto;
        padding-top: 4rem;
        padding-bottom: 0.8rem;
        padding-left: 1rem;
        padding-right: 1rem;
        justify-content: center;
        align-items: center;
        flex-direction: column;
        background: none;
        border-right: none;
        border-bottom: none;
        display: flex;
        gap: 0.8rem;
        overflow-y: auto;
    }
    
    .now-playing-badge {
        display: none;
    }
    
    .album-art-wrapper {
        max-width: 240px;
        margin: 0 auto;
        width: 240px;
        height: 240px;
    }
    
    .album-art {
        box-shadow: 0 15px 40px rgba(29, 185, 84, 0.3);
        animation: albumBounce 3s ease-in-out infinite;
        border-radius: 16px;
    }
}

/* Desktop Album Art Styling */
@media (min-width: 769px) {
    .album-art {
        border-radius: 16px;
        box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    }
}

/* Player Middle Section - Info & Message */
.player-middle-section {
    flex: 0 1 auto;
    padding: 1.5rem 1rem;
    text-align: center;
    overflow-y: auto;
    max-height: 40vh;
    opacity: 1 !important;
    visibility: visible !important;
    transition: opacity 0.3s ease-out 0.1s, transform 0.3s ease-out 0.1s;
    transform: translate(0, 0) scale(1);
    transform-origin: center center;
    will-change: auto;
}

@media (min-width: 769px) {
    .player-middle-section {
        flex: 1;
        width: calc(100% - 420px);
        height: auto;
        max-height: calc(100vh - 150px);
        padding: 2.5rem;
        display: flex;
        flex-direction: column;
        justify-content: flex-start;
        overflow-y: auto;
        overflow-x: hidden;
        border-left: none;
        border-bottom: 2px solid var(--border-color);
        gap: 1.5rem;
        text-align: left;
    }
}

.music-player-container.closing .player-middle-section {
    opacity: 0;
    transform: translateY(20px) scale(0.95);
}

@media (min-width: 769px) {
    .music-player-container.closing .player-middle-section {
        transform: translateX(20px) scale(0.95);
    }
}

/* Artist Info */
.artist-info {
    margin-bottom: 1.5rem;
    opacity: 1 !important;
    visibility: visible !important;
    text-align: left;
    width: 100%;
}

.artist-info h1 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    opacity: 1 !important;
    text-align: left;
    word-wrap: break-word;
}

@media (min-width: 769px) {
    .artist-info h1 {
        font-size: 2rem;
        margin-top: 0.5rem;
        font-weight: 800;
        text-align: left;
    }
}

.artist-info p {
    font-size: 1rem;
    color: var(--text-secondary);
    opacity: 1 !important;
    text-align: left;
}

@media (min-width: 769px) {
    .artist-info p {
        font-size: 1.1rem;
        color: var(--text-secondary);
        text-align: left;
    }
}

@media (max-width: 768px) {
    .artist-info {
        margin-bottom: 0.8rem;
    }
    
    .artist-info h1 {
        font-size: 1.2rem;
        text-align: center;
        margin-bottom: 0.3rem;
    }
    
    .artist-info p {
        font-size: 0.8rem;
        text-align: center;
    }
}

/* Message Display New Style */
.message-display-new {
    background: var(--bg-secondary);
    border-radius: 15px;
    padding: 1.5rem;
    border: 2px solid var(--border-color);
    margin-bottom: 1.5rem;
    text-align: center;
    opacity: 1 !important;
    visibility: visible !important;
}

@media (min-width: 769px) {
    .message-display-new {
        flex: 0;
        display: flex;
        flex-direction: column;
        margin-bottom: 1rem;
        padding: 1.5rem;
        border-radius: 12px;
        min-height: auto;
        background: var(--bg-secondary);
        text-align: left;
    }
}

@media (max-width: 768px) {
    .message-display-new {
        padding: 1.2rem;
        margin-bottom: 1rem;
        border-radius: 12px;
        background: var(--bg-secondary);
        border: 2px solid var(--border-color);
    }
    
    .message-display-new .message-header {
        color: var(--primary-color);
    }
    
    .message-display-new .message-content {
        color: var(--text-primary);
        background: var(--bg-main);
    }
}

.message-display-new .message-header {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 0.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.95rem;
    opacity: 1 !important;
}

@media (min-width: 769px) {
    .message-display-new .message-header {
        justify-content: flex-start;
    }
}

.message-display-new .message-content {
    line-height: 1.6;
    color: var(--text-primary);
    font-style: italic;
    margin-bottom: 0.5rem;
    min-height: 60px;
    max-height: 200px;
    overflow-y: auto;
    opacity: 1 !important;
    background: var(--bg-main);
    padding: 1rem;
    border-radius: 8px;
    font-size: 0.95rem;
    text-align: left;
}

@media (min-width: 769px) {
    .message-display-new .message-content {
        text-align: left;
        font-size: 0.95rem;
    }
}

.message-display-new .message-content::-webkit-scrollbar {
    width: 6px;
}

.message-display-new .message-content::-webkit-scrollbar-track {
    background: var(--bg-main);
    border-radius: 10px;
}

.message-display-new .message-content::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 10px;
}

/* Info Section */
.info-section {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: 12px;
    text-align: center;
    opacity: 1 !important;
    visibility: visible !important;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

@media (min-width: 769px) {
    .info-section {
        flex-direction: row;
        gap: 1.5rem;
        padding: 1rem;
        font-size: 0.95rem;
        margin-bottom: 1rem;
        justify-content: flex-start;
        text-align: left;
    }
}

@media (max-width: 768px) {
    .info-section {
        gap: 0.8rem;
        padding: 0.8rem;
        flex-wrap: wrap;
        background: var(--bg-secondary);
        border: 1px solid var(--border-color);
    }
}

.info-item {
    flex: 1;
    text-align: left;
}

@media (min-width: 769px) {
    .info-item {
        flex: none;
        text-align: left;
    }
}

.info-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.3rem;
}

.info-value {
    font-size: 1rem;
    color: var(--text-primary);
    font-weight: 600;
}

.info-divider {
    width: 1px;
    height: 30px;
    background: var(--border-color);
}

/* Mobile Middle Section */
@media (max-width: 768px) {
    .player-middle-section {
        padding: 1rem 0.8rem;
        max-height: 35vh;
        background: transparent;
        text-align: center;
        gap: 0.8rem;
    }
    
    .message-display-new {
        background: var(--bg-secondary);
        border: 1px solid var(--border-color);
        padding: 0.8rem;
        margin-bottom: 0.6rem;
        color: var(--text-primary);
        text-align: center;
        border-radius: 10px;
    }
    
    .message-display-new .message-header {
        font-size: 0.75rem;
        margin-bottom: 0.5rem;
        color: var(--primary-color);
        justify-content: center;
        font-weight: 600;
    }
    
    .message-display-new .message-content {
        font-size: 0.8rem;
        min-height: 40px;
        max-height: 80px;
        color: var(--text-primary);
        background: var(--bg-main);
        text-align: center;
        padding: 0.6rem;
        border-radius: 6px;
    }
    
    .info-section {
        gap: 0.6rem;
        padding: 0.8rem;
        font-size: 0.8rem;
        background: var(--bg-secondary);
        border: 1px solid var(--border-color);
        justify-content: center;
        border-radius: 10px;
    }
    
    .info-item {
        flex: 1;
    }
    
    .info-label {
        font-size: 0.65rem;
        color: var(--text-secondary);
        margin-bottom: 0.2rem;
    }
    
    .info-value {
        font-size: 0.8rem;
        color: var(--text-primary);
        font-weight: 600;
    }
    
    .info-divider {
        height: 20px;
    }
}

/* Player Bottom Section - Controls */
.player-bottom-section {
    flex: 0 0 auto;
    padding: 1.5rem;
    background: linear-gradient(to top, var(--bg-main), transparent);
    border-top: 1px solid var(--border-color);
    opacity: 1 !important;
    visibility: visible !important;
    transition: opacity 0.3s ease-out 0.2s, transform 0.3s ease-out 0.2s;
    transform: translate(0, 0) scale(1);
    transform-origin: center center;
    will-change: auto;
}

.music-player-container.closing .player-bottom-section {
    opacity: 0;
    transform: translateY(30px) scale(0.95);
}

/* Desktop Bottom Section */
@media (min-width: 769px) {
    .player-bottom-section {
        position: relative;
        bottom: auto;
        right: auto;
        left: auto;
        width: 100%;
        flex: 0 0 100%;
        height: auto;
        flex-direction: column;
        background: var(--bg-secondary);
        border-top: 1px solid var(--border-color);
        padding: 1.5rem 2rem;
        gap: 1rem;
        display: flex;
    }
    
    .music-player-container.closing .player-bottom-section {
        transform: translateY(20px) scale(0.95);
    }
}

.progress-section {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.2rem;
    opacity: 1 !important;
    visibility: visible !important;
}

@media (min-width: 769px) {
    .progress-section {
        gap: 0.8rem;
        margin-bottom: 0.8rem;
    }
    
    .time-display {
        font-size: 0.85rem;
        min-width: 35px;
    }
}

.time-display {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 600;
    min-width: 40px;
}

/* Mobile Progress Section */
@media (max-width: 768px) {
    .progress-section {
        gap: 0.6rem;
        margin-bottom: 1rem;
    }
    
    .time-display {
        font-size: 0.7rem;
        min-width: 30px;
        color: var(--text-secondary);
    }
    
    .progress-bar {
        height: 6px;
    }
}

.progress-bar {
    flex: 1;
    height: 8px;
    background: var(--bg-secondary);
    border-radius: 10px;
    position: relative;
    cursor: pointer;
    overflow: visible;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #1db954 0%, #1ed760 50%, #1db954 100%);
    border-radius: 10px;
    width: 35%;
    position: relative;
    transition: width 0.1s ease;
    animation: wavingProgress 2.5s ease-in-out infinite;
    overflow: hidden;
    box-shadow: inset 0 1px 2px rgba(255, 255, 255, 0.2);
}

.progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background: radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.3) 0%, transparent 50%),
                radial-gradient(circle at 50% 30%, rgba(255, 255, 255, 0.2) 0%, transparent 50%),
                radial-gradient(circle at 80% 50%, rgba(255, 255, 255, 0.3) 0%, transparent 50%);
    background-size: 40px 40px;
    background-position: 0 0;
    animation: waveShine 2.5s ease-in-out infinite;
}

@keyframes wavingProgress {
    0% {
        filter: drop-shadow(0 0 0 transparent);
    }
    25% {
        filter: drop-shadow(2px 3px 8px rgba(29, 185, 84, 0.5));
    }
    50% {
        filter: drop-shadow(0 5px 12px rgba(29, 185, 84, 0.7));
    }
    75% {
        filter: drop-shadow(-2px 3px 8px rgba(29, 185, 84, 0.5));
    }
    100% {
        filter: drop-shadow(0 0 0 transparent);
    }
}

@keyframes waveShine {
    0% {
        background-position: -40px 0;
    }
    100% {
        background-position: 40px 0;
    }
}

.progress-handle {
    width: 18px;
    height: 18px;
    background: linear-gradient(135deg, #1ed760 0%, #1db954 100%);
    border: 3px solid #ffffff;
    border-radius: 50%;
    position: absolute;
    top: -5px;
    left: 35%;
    transform: translateX(-50%);
    box-shadow: 0 3px 12px rgba(29, 185, 84, 0.6), inset 0 1px 3px rgba(255, 255, 255, 0.3);
    cursor: grab;
    transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
    animation: handlePulse 2s ease-in-out infinite;
    z-index: 10;
}

@keyframes handlePulse {
    0%, 100% {
        box-shadow: 0 3px 12px rgba(29, 185, 84, 0.6), inset 0 1px 3px rgba(255, 255, 255, 0.3);
        width: 18px;
        height: 18px;
    }
    50% {
        box-shadow: 0 6px 18px rgba(29, 185, 84, 0.8), inset 0 1px 3px rgba(255, 255, 255, 0.3);
        width: 20px;
        height: 20px;
    }
}

.progress-handle:hover,
.progress-handle:active {
    transform: translateX(-50%) scale(1.3);
    box-shadow: 0 6px 20px rgba(29, 185, 84, 0.9), inset 0 1px 3px rgba(255, 255, 255, 0.5);
    animation: none;
    cursor: grabbing;
}

.control-buttons {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1.5rem;
    opacity: 1 !important;
    visibility: visible !important;
}

@media (min-width: 769px) {
    .control-buttons {
        gap: 1.2rem;
    }
}

.control-btn {
    width: 45px;
    height: 45px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    will-change: transform, background, border-color;
}

@media (max-width: 768px) {
    .control-btn {
        width: 40px;
        height: 40px;
        font-size: 0.9rem;
    }
}

@media (min-width: 769px) {
    .control-btn {
        width: 45px;
        height: 45px;
        font-size: 1.1rem;
    }
}

.control-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.control-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.play-pause {
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    font-size: 1.3rem;
}

@media (max-width: 768px) {
    .play-pause {
        width: 50px;
        height: 50px;
        font-size: 1.1rem;
    }
}

@media (min-width: 769px) {
    .play-pause {
        width: 60px;
        height: 60px;
        font-size: 1.4rem;
    }
}

.play-pause:hover {
    background: #1ed760;
}

/* Mobile Control Buttons */
@media (max-width: 768px) {
    .control-buttons {
        gap: 1rem;
        justify-content: center;
        padding: 0;
    }
    
    .control-btn {
        width: 45px;
        height: 45px;
        font-size: 1rem;
    }
    
    .play-pause {
        width: 70px;
        height: 70px;
        font-size: 1.8rem;
    }
    
}


/* Vinyl Spinning Animation */
.vinyl-spinning {
    position: absolute;
    width: 80%;
    height: 80%;
    background: radial-gradient(circle, rgba(26, 26, 26, 0.9) 30%, rgba(0, 0, 0, 0.95) 70%);
    border-radius: 50%;
    top: 10%;
    left: -10%;
    z-index: -1;
    animation: spin 8s linear infinite;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
}

.vinyl-spinning::before {
    content: '';
    position: absolute;
    width: 30%;
    height: 30%;
    background: var(--primary-color);
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

/* Waveform Animation */
/* Responsive Music Player */
@media (max-width: 1024px) {
    .info-section {
        flex-wrap: wrap;
    }
}

/* Teacher Player Specific Styles */
.teacher-player .vinyl-spinning {
    background: radial-gradient(circle, #FFD700 30%, #FFA500 70%);
}

.gold-vinyl::before {
    background: var(--accent-color);
}

.teacher-badge-large {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    padding: 0.7rem 1.5rem;
    border-radius: 25px;
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 1rem;
    box-shadow: 0 4px 15px rgba(29, 185, 84, 0.3);
}

.teacher-message-section {
    margin-bottom: 2rem;
}

.teacher-message-section .message-display {
    max-width: 100%;
}

.teacher-message-section .message-content {
    font-size: 1.1rem;
    max-height: 200px;
}

/* Filter Section */
.filter-section {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2.5rem;
    gap: 1.5rem;
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: 15px;
    border: 2px solid var(--border-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    opacity: 1 !important;
    visibility: visible !important;
}

@media (max-width: 768px) {
    .filter-section {
        flex-direction: column;
        align-items: stretch;
        margin-bottom: 2rem;
        gap: 1rem;
        padding: 1.2rem;
        flex-wrap: wrap;
    }
}

@media (max-width: 480px) {
    .filter-section {
        margin-bottom: 1.5rem;
        gap: 0.8rem;
        padding: 1rem;
        border-radius: 12px;
    }
}

.search-box {
    flex: 1;
    min-width: 280px;
    max-width: 100%;
    position: relative;
    display: flex;
    align-items: center;
    opacity: 1 !important;
    visibility: visible !important;
}

@media (max-width: 768px) {
    .search-box {
        min-width: 100%;
        flex: 1;
        width: 100%;
    }
}

.search-box i {
    position: absolute;
    left: 1.2rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--primary-color);
    font-size: 1.1rem;
    z-index: 2;
}

.search-box input {
    width: 100%;
    padding: 0.9rem 1rem 0.9rem 3.2rem;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition);
}

.search-box input::placeholder {
    color: var(--text-secondary);
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
    background: var(--bg-main);
    box-shadow: 0 0 0 3px rgba(29, 185, 84, 0.1);
}

@media (max-width: 768px) {
    .search-box input {
        padding: 0.8rem 0.8rem 0.8rem 2.8rem;
        font-size: 0.95rem;
        border-radius: 8px;
    }
}

@media (max-width: 480px) {
    .search-box {
        min-width: 100%;
    }
    
    .search-box input {
        padding: 0.75rem 0.8rem 0.75rem 2.6rem;
        font-size: 0.9rem;
        border-radius: 8px;
    }
    
    .search-box i {
        left: 1rem;
        font-size: 1rem;
    }
}

.filter-buttons {
    display: flex;
    gap: 0.8rem;
    align-items: center;
    justify-content: flex-end;
    flex-wrap: wrap;
}

@media (max-width: 768px) {
    .filter-buttons {
        gap: 0.6rem;
        justify-content: stretch;
        width: 100%;
    }
}

@media (max-width: 480px) {
    .filter-buttons {
        gap: 0.5rem;
        width: 100%;
    }
}

.filter-btn {
    padding: 0.85rem 1.8rem;
    background: var(--bg-main);
    border: 2px solid var(--border-color);
    color: var(--text-secondary);
    border-radius: 10px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
    opacity: 1 !important;
    white-space: nowrap;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.filter-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: rgba(29, 185, 84, 0.05);
}

.filter-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    box-shadow: 0 4px 12px rgba(29, 185, 84, 0.3);
}

@media (max-width: 768px) {
    .filter-btn {
        padding: 0.7rem 1.4rem;
        font-size: 0.9rem;
        flex: 1;
        min-width: 100px;
    }
}

@media (max-width: 480px) {
    .filter-btn {
        padding: 0.65rem 1rem;
        font-size: 0.85rem;
        min-width: 80px;
    }
    
    .filter-btn span {
        display: none;
    }
    
    .filter-btn i {
        margin: 0;
    }
}

/* Students Grid */
.students-grid, .teachers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    opacity: 1;
    visibility: visible;
}

@media (max-width: 768px) {
    .students-grid, .teachers-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    .students-grid, .teachers-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.8rem;
    }
}

.student-card, .teacher-card {
    background: var(--bg-card);
    border-radius: 15px;
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow);
    opacity: 1 !important;
    visibility: visible !important;
}

.student-card:hover, .teacher-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.6);
}

.card-album-cover {
    position: relative;
    padding-top: 100%;
    overflow: hidden;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
}

.card-album-cover img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.play-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.student-card:hover .play-overlay,
.teacher-card:hover .play-overlay {
    opacity: 1;
}

.play-btn {
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    transition: var(--transition);
}

.play-btn:hover {
    transform: scale(1.1);
}

@media (max-width: 768px) {
    .play-btn {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }
}

.card-info {
    padding: 1.5rem;
}

.card-info h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.card-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .card-info {
        padding: 1rem;
    }
    
    .card-info h3 {
        font-size: 1rem;
        margin-bottom: 0.3rem;
    }
    
    .card-info p {
        font-size: 0.8rem;
    }
}

/* Student Detail Modal */
.student-detail, .teacher-detail {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 3rem;
    align-items: center;
}

@media (max-width: 768px) {
    .student-detail, .teacher-detail {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

.student-album-cover, .teacher-album-cover {
    position: relative;
}

.student-album-cover img, .teacher-album-cover img {
    width: 100%;
    border-radius: 15px;
    box-shadow: var(--shadow);
}

@media (max-width: 768px) {
    .student-album-cover img, .teacher-album-cover img {
        max-width: 100%;
        height: auto;
    }
}

.album-vinyl {
    position: absolute;
    width: 80%;
    height: 80%;
    background: radial-gradient(circle, #1a1a1a 30%, #000 70%);
    border-radius: 50%;
    top: 10%;
    left: -20%;
    z-index: -1;
    animation: spin 10s linear infinite;
    box-shadow: 0 0 30px rgba(0, 0, 0, 0.8);
}

.album-vinyl.gold {
    background: radial-gradient(circle, #FFD700 30%, #FFA500 70%);
}

.student-info, .teacher-info {
    padding: 2rem;
}

.student-info h2, .teacher-info h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

@media (max-width: 768px) {
    .student-info, .teacher-info {
        padding: 1rem;
    }
    
    .student-info h2, .teacher-info h2 {
        font-size: 1.8rem;
    }
}

.info-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

.message-box {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 15px;
    border-left: 4px solid var(--primary-color);
    margin-top: 2rem;
    position: relative;
}

@media (max-width: 768px) {
    .message-box {
        padding: 1.5rem;
        margin-top: 1.5rem;
    }
}

.message-box i {
    color: var(--primary-color);
    font-size: 1.5rem;
}

.message-box p {
    margin: 1rem 0;
    line-height: 1.8;
    font-size: 1.1rem;
    font-style: italic;
}

.teacher-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 600;
    margin-bottom: 1rem;
}

/* Teacher Detail Form */
.teacher-detail-form {
    background: var(--bg-secondary);
    border-radius: 20px;
    padding: 3rem;
    margin-bottom: 3rem;
    box-shadow: var(--shadow);
    position: relative;
    animation: slideInForm 0.5s ease;
    opacity: 1 !important;
}

@keyframes slideInForm {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.close-detail-form {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-primary);
    cursor: pointer;
    padding: 0.5rem;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.close-detail-form:hover {
    color: var(--accent-color);
    transform: rotate(90deg);
}

.teacher-detail-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 3rem;
    align-items: center;
    opacity: 1 !important;
}

.teacher-detail-photo {
    position: relative;
    opacity: 1 !important;
}

.teacher-detail-photo img {
    width: 100%;
    border-radius: 15px;
    box-shadow: var(--shadow);
    opacity: 1 !important;
}

.teacher-detail-info {
    padding: 1rem;
    opacity: 1 !important;
}

.teacher-detail-info h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    margin-top: 0.5rem;
    opacity: 1 !important;
}

.teacher-message-box {
    background: var(--bg-main);
    padding: 2rem;
    border-radius: 15px;
    border-left: 4px solid var(--primary-color);
    margin-top: 2rem;
    opacity: 1 !important;
}

.teacher-message-box .message-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-weight: 600;
    opacity: 1 !important;
}

.teacher-message-box .message-header i {
    color: var(--primary-color);
    font-size: 1.2rem;
}

.teacher-message-box p {
    margin: 0;
    line-height: 1.8;
    font-size: 1.05rem;
    color: var(--text-secondary);
    opacity: 1 !important;
}

/* Mobile adjustments for teacher detail */
@media (max-width: 768px) {
    .teacher-detail-form {
        padding: 1.5rem;
        margin-bottom: 2rem;
        opacity: 1 !important;
    }
    
    .teacher-detail-content {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        opacity: 1 !important;
    }
    
    .teacher-detail-info {
        padding: 0;
        opacity: 1 !important;
    }
    
    .teacher-detail-info h2 {
        font-size: 1.8rem;
        margin-bottom: 1rem;
        margin-top: 0;
        opacity: 1 !important;
    }
    
    .teacher-message-box {
        padding: 1.5rem;
        margin-top: 1.5rem;
        opacity: 1 !important;
    }
    
    .close-detail-form {
        top: 1rem;
        right: 1rem;
        font-size: 1.2rem;
    }
}

/* Profile Page */
.profile-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem;
}

.profile-header {
    text-align: center;
    margin-bottom: 3rem;
}

.profile-header i {
    font-size: 4rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.profile-form {
    background: var(--bg-card);
    padding: 3rem;
    border-radius: 20px;
    box-shadow: var(--shadow);
    animation: slideInForm 0.5s ease;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
}

.photo-upload-section {
    text-align: center;
    position: relative;
}

.photo-preview {
    width: 300px;
    height: 300px;
    margin: 0 auto 1rem;
    border-radius: 15px;
    overflow: hidden;
    position: relative;
    cursor: pointer;
    border: 3px solid var(--border-color);
    transition: var(--transition);
}

.photo-preview:hover {
    border-color: var(--primary-color);
    transform: scale(1.02);
}

.photo-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.upload-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
    color: white;
}

.photo-preview:hover .upload-overlay {
    opacity: 1;
}

.upload-overlay i {
    font-size: 3rem;
    margin-bottom: 0.5rem;
}

/* Memories Page */
.memories-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
    margin-bottom: 4rem;
    opacity: 1 !important;
    visibility: visible !important;
    grid-auto-flow: dense;
}

.memory-card {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition);
    opacity: 1 !important;
    visibility: visible !important;
    border: 1px solid rgba(29, 185, 84, 0.2);
    background: var(--bg-card);
}

.memory-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 50px rgba(29, 185, 84, 0.3), 0 0 30px rgba(29, 185, 84, 0.1);
    border-color: rgba(29, 185, 84, 0.5);
}

/* Landscape orientation */
.memory-card.landscape {
    grid-column: span 2;
    grid-row: span 1;
}

.memory-card.landscape .memory-frame {
    padding-top: 45%;
}

/* Portrait orientation */
.memory-card.portrait {
    grid-column: span 1;
    grid-row: span 2;
    display: flex;
    flex-direction: column;
}

.memory-card.portrait .memory-frame {
    padding-top: 0;
    flex: 1;
    min-height: 0;
}

/* Large cards for wider aspect ratios */
.memory-large {
    grid-column: span 2;
}

.memory-frame {
    position: relative;
    padding-top: 75%;
    overflow: hidden;
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(40, 40, 40, 0.8) 100%);
    box-shadow: inset 0 1px 3px rgba(29, 185, 84, 0.1), var(--shadow);
    transition: var(--transition);
    border: 1px solid rgba(29, 185, 84, 0.1);
    aspect-ratio: auto;
}

.memory-card.portrait .memory-frame {
    padding-top: 0;
    aspect-ratio: 3/4;
}

.memory-frame img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
    /* Responsive image optimization */
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
    /* Enable srcset support */
    max-width: 100%;
    height: auto;
}

.memory-card:hover .memory-frame img {
    transform: scale(1.05);
}

/* Lazy Loading Styles */
.memory-frame img.loading {
    opacity: 0;
    animation: shimmer 2s infinite;
}

.memory-frame img.loaded {
    opacity: 1;
    animation: fadeIn 0.5s ease-out;
}

.memory-frame img.error {
    opacity: 0.5;
    background: var(--bg-secondary) !important;
}

@keyframes shimmer {
    0% {
        background-color: hsl(0, 0%, 50%);
        background-image: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
        background-size: 200% 100%;
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* Responsive Image Optimization */
img {
    /* Ensure images scale properly */
    display: block;
    max-width: 100%;
    height: auto;
}

/* Gallery Item Responsive Images */
.gallery-item-img {
    /* Enable native lazy loading */
    loading: lazy;
    /* Optimize for different densities */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.gallery-item-img.loading {
    opacity: 0;
    animation: shimmer 2s infinite;
}

.gallery-item-img.loaded {
    opacity: 1;
    animation: fadeIn 0.5s ease-out;
}

.gallery-item-img.error {
    opacity: 0.5;
}

.memory-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.95) 0%, rgba(0,0,0,0.7) 50%, transparent 100%);
    padding: 1.5rem;
    color: white;
    opacity: 0;
    transition: var(--transition);
}

.memory-card:hover .memory-overlay {
    opacity: 1;
}

.memory-overlay h3 {
    font-size: 1rem;
    margin-bottom: 0.3rem;
    color: var(--primary-color);
    font-weight: 600;
}

.memory-overlay p {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.8);
}

.polaroid-effect {
    position: relative;
    height: 45px;
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(40, 40, 40, 0.9) 100%);
    border-top: 2px solid var(--primary-color);
    box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.3), 0 8px 16px rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(5px);
}

/* Timeline */
.timeline-section {
    margin-top: 4rem;
    opacity: 1 !important;
    visibility: visible !important;
}

.timeline-section h2 {
    text-align: center;
    margin-bottom: 3rem;
    font-size: 2rem;
    opacity: 1 !important;
    visibility: visible !important;
}

.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    padding: 2rem 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--primary-color);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
    display: flex;
    justify-content: center;
    opacity: 1 !important;
    visibility: visible !important;
}

.timeline-dot {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 50%;
    border: 4px solid var(--bg-main);
    z-index: 1;
    opacity: 1 !important;
    visibility: visible !important;
}

.timeline-content {
    width: 45%;
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    opacity: 1 !important;
    visibility: visible !important;
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-right: auto;
    margin-left: 0;
}

.timeline-item:nth-child(even) .timeline-content {
    margin-left: auto;
    margin-right: 0;
}

/* Footer */
.music-footer {
    background: var(--bg-secondary);
    padding: 2rem;
    margin-top: 4rem;
    box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.3);
    opacity: 1 !important;
    visibility: visible !important;
}

.footer-content {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
}

@media (max-width: 768px) {
    .music-footer {
        padding: 1.5rem 1rem;
        margin-top: 3rem;
    }
    
    .footer-content {
        gap: 1rem;
        flex-direction: row;
        text-align: left;
    }
    
    .footer-left, .footer-center, .footer-right {
        width: 100%;
    }
}

.footer-left {
    display: flex;
    align-items: center;
    gap: 1rem;
    opacity: 1 !important;
    visibility: visible !important;
}

.footer-left i {
    color: var(--primary-color);
    font-size: 1.5rem;
}

.footer-center {
    flex: 1;
    display: flex;
    justify-content: center;
    opacity: 1 !important;
    visibility: visible !important;
}

.equalizer {
    display: flex;
    gap: 5px;
    align-items: flex-end;
    height: 40px;
}

.equalizer span {
    width: 4px;
    background: var(--primary-color);
    animation: equalizer 1s ease-in-out infinite;
}

.equalizer span:nth-child(1) { animation-delay: 0s; }
.equalizer span:nth-child(2) { animation-delay: 0.2s; }
.equalizer span:nth-child(3) { animation-delay: 0.4s; }
.equalizer span:nth-child(4) { animation-delay: 0.6s; }
.equalizer span:nth-child(5) { animation-delay: 0.8s; }

@keyframes equalizer {
    0%, 100% { height: 10px; }
    50% { height: 40px; }
}

.footer-right {
    display: flex;
    gap: 1rem;
    opacity: 1 !important;
    visibility: visible !important;
}

.footer-right a {
    width: 40px;
    height: 40px;
    background: var(--bg-card);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    transition: var(--transition);
}

.footer-right a:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-5px);
}

/* Responsive */
@media (max-width: 768px) {
    .header-nav {
        display: none;
    }
    
    .filter-section {
        flex-direction: column;
        gap: 1rem;
    }
    
    .search-box {
        min-width: 100%;
    }
    
    .filter-buttons {
        width: 100%;
    }
    
    .glitch {
        font-size: 2.5rem;
    }
    
    .student-detail, .teacher-detail {
        grid-template-columns: 1fr;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    /* Mobile memories layout */
    .memories-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
    
    .memory-card.landscape {
        grid-column: span 2;
        grid-row: span 1;
    }
    
    .memory-card.portrait {
        grid-column: span 1;
        grid-row: span 1;
        display: block;
    }
    
    .memory-card.portrait .memory-frame {
        padding-top: 135%;
        aspect-ratio: auto;
    }
    
    .memory-large {
        grid-column: span 2;
    }
    
    .timeline::before {
        left: 20px;
    }
    
    .timeline-content {
        width: calc(100% - 60px);
        margin-left: 60px !important;
    }
    
    .timeline-dot {
        left: 20px;
    }
}

/* Desktop layout optimization */
@media (min-width: 1200px) {
    /* Memories container for large screens */
    .memories-container {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }
    
    .memory-card.landscape {
        grid-column: span 2;
    }
    
    .memory-card.portrait {
        grid-column: span 1;
        grid-row: span 2;
    }
}

/* Audio Range Slider Styling */
.form-range {
    width: 100%;
    height: 8px;
    border-radius: 5px;
    background: var(--border-color);
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    cursor: pointer;
}

/* Webkit browsers (Chrome, Safari, Edge) */
.form-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    transition: all 0.2s ease;
}

.form-range::-webkit-slider-thumb:hover {
    width: 22px;
    height: 22px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.form-range::-webkit-slider-runnable-track {
    background: linear-gradient(to right, var(--primary-color) 0%, var(--primary-color) var(--slider-value, 0%), var(--border-color) var(--slider-value, 0%), var(--border-color) 100%);
    height: 8px;
    border-radius: 5px;
}

/* Firefox */
.form-range::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    transition: all 0.2s ease;
}

.form-range::-moz-range-thumb:hover {
    width: 22px;
    height: 22px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.form-range::-moz-range-track {
    background: var(--border-color);
    border: none;
    border-radius: 5px;
}

.form-range::-moz-range-progress {
    background: var(--primary-color);
    border-radius: 5px;
}

/* Audio Timeline */
.audio-timeline {
    user-select: none;
    cursor: pointer;
}

/* Auto Trim Modal Dialog */
#autoTrimModal input[type="range"] {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--border-color);
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    cursor: pointer;
}

#autoTrimModal input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
    transition: all 0.2s ease;
}

#autoTrimModal input[type="range"]::-webkit-slider-thumb:hover {
    width: 20px;
    height: 20px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

#autoTrimModal input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
    transition: all 0.2s ease;
}

#autoTrimModal input[type="range"]::-moz-range-thumb:hover {
    width: 20px;
    height: 20px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

#autoTrimModal input[type="number"] {
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 0.3rem;
    background: var(--bg-color);
    color: var(--text-color);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

#autoTrimModal input[type="number"]:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.1);
}

/* ========== MOBILE RESPONSIVE - PROFILE PAGE ========== */

@media (max-width: 768px) {
    /* Profile Container */
    .profile-container {
        max-width: 100%;
        margin: 0 auto;
        padding: 1rem;
    }
    
    .profile-header {
        margin-bottom: 1.5rem;
    }
    
    .profile-header i {
        font-size: 2.5rem;
        margin-bottom: 0.5rem;
    }
    
    .profile-header h1 {
        font-size: 1.5rem;
        margin-bottom: 0.3rem;
    }
    
    .profile-header p {
        font-size: 0.85rem;
    }
    
    /* Profile Form */
    .profile-form {
        padding: 1.5rem;
        border-radius: 15px;
    }
    
    /* Form Grid - Single Column on Mobile */
    .form-grid {
        display: grid;
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    /* Photo Preview */
    .photo-preview {
        width: 200px;
        height: 200px;
        margin: 0 auto 1rem;
        border-radius: 12px;
    }
    
    .photo-upload-section {
        order: -1; /* Put photo at top on mobile */
    }
    
    /* Form Fields */
    .form-fields {
        width: 100%;
    }
    
    .form-group {
        margin-bottom: 1rem;
    }
    
    .form-group label {
        font-size: 0.9rem;
    }
    
    .form-group input,
    .form-group textarea {
        font-size: 16px; /* Prevents zoom on iOS */
        padding: 0.8rem;
    }
    
    /* Audio Section */
    .audio-section {
        margin-bottom: 1rem;
    }
    
    .audio-input-options {
        width: 100%;
    }
    
    .audio-tabs {
        display: flex;
        flex-wrap: wrap;
        gap: 0.5rem;
        margin-bottom: 1rem;
    }
    
    .audio-tab-btn {
        flex: 1;
        min-width: 120px;
        padding: 0.6rem 0.8rem;
        font-size: 0.8rem;
    }
    
    /* Audio Player */
    .audio-player-preview audio {
        width: 100%;
        height: 40px;
    }
    
    /* Trim Section */
    .audio-trim-section {
        padding: 1.2rem !important;
        border-radius: 0.8rem !important;
        margin-bottom: 1rem !important;
        transition: all 0.3s ease !important;
    }
    
    .audio-trim-section:hover {
        box-shadow: 0 4px 12px rgba(76, 175, 80, 0.1) !important;
    }
    
    .audio-trim-section h4 {
        font-size: 1rem !important;
        margin-bottom: 1rem !important;
        font-weight: 600 !important;
        display: flex !important;
        align-items: center !important;
        gap: 0.5rem !important;
    }
    
    .audio-trim-section p {
        font-size: 0.9rem !important;
        margin-bottom: 1rem !important;
        line-height: 1.4 !important;
    }

    /* Timeline Canvas */
    .audio-timeline {
        height: 70px;
        margin-bottom: 0.5rem;
        border-radius: 0.5rem;
        box-shadow: inset 0 2px 4px rgba(0,0,0,0.05);
        transition: box-shadow 0.3s ease;
    }
    
    .audio-timeline:hover {
        box-shadow: inset 0 2px 8px rgba(0,0,0,0.08);
    }

    /* Trim Controls */
    .audio-trim-section .form-group {
        margin-bottom: 1rem;
    }

    .audio-trim-section .form-group label {
        font-size: 0.85rem;
        font-weight: 600;
        display: flex;
        align-items: center;
        gap: 0.5rem;
        margin-bottom: 0.5rem;
    }

    .audio-trim-section input[type="range"] {
        height: 6px;
        border-radius: 3px;
        background: linear-gradient(to right, #ddd, #ccc);
        outline: none;
        -webkit-appearance: none;
        appearance: none;
    }

    .audio-trim-section input[type="range"]::-webkit-slider-thumb {
        -webkit-appearance: none;
        appearance: none;
        width: 18px;
        height: 18px;
        border-radius: 50%;
        background: linear-gradient(135deg, #4CAF50 0%, #45a049 100%);
        cursor: pointer;
        box-shadow: 0 2px 6px rgba(76, 175, 80, 0.4);
        transition: all 0.2s ease;
    }

    .audio-trim-section input[type="range"]::-webkit-slider-thumb:hover {
        transform: scale(1.15);
        box-shadow: 0 4px 10px rgba(76, 175, 80, 0.6);
    }

    .audio-trim-section input[type="range"]::-moz-range-thumb {
        width: 18px;
        height: 18px;
        border-radius: 50%;
        background: linear-gradient(135deg, #4CAF50 0%, #45a049 100%);
        cursor: pointer;
        border: none;
        box-shadow: 0 2px 6px rgba(76, 175, 80, 0.4);
        transition: all 0.2s ease;
    }

    .audio-trim-section input[type="range"]::-moz-range-thumb:hover {
        transform: scale(1.15);
        box-shadow: 0 4px 10px rgba(76, 175, 80, 0.6);
    }

    .audio-trim-section input[type="number"] {
        font-size: 0.85rem;
        padding: 0.5rem;
        border: 1px solid var(--border-color);
        border-radius: 0.3rem;
        background: var(--bg-color);
        color: var(--text-color);
        transition: all 0.2s ease;
    }

    .audio-trim-section input[type="number"]:focus {
        border-color: #4CAF50;
        box-shadow: 0 0 6px rgba(76, 175, 80, 0.2);
        outline: none;
    }

    .audio-trim-section .btn-small {
        padding: 0.7rem !important;
        font-size: 0.85rem !important;
        font-weight: 600 !important;
        border-radius: 0.5rem !important;
        border: none !important;
        cursor: pointer !important;
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
        gap: 0.5rem !important;
        transition: all 0.3s ease !important;
    }

    .audio-trim-section .btn-small:hover {
        transform: translateY(-2px);
        box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    }

    .audio-trim-section .btn-small:active {
        transform: translateY(0);
    }

    /* Buttons */
    .btn-save,
    .btn-upload,
    .btn-small {
        width: 100%;
        padding: 0.8rem;
        font-size: 0.9rem;
        margin-bottom: 0.5rem;
    }
    
    .btn-save:hover,
    .btn-upload:hover {
        transform: translateY(-2px);
    }
    
    /* Form Input URL */
    .form-input-url {
        font-size: 0.9rem;
        padding: 0.8rem;
        width: 100%;
    }
    
    /* Download Status */
    #studentDownloadStatus {
        font-size: 0.85rem;
    }
    
    #studentAudioFilesList {
        margin-top: 0.8rem !important;
    }
    
    #studentAudioFilesList h5 {
        font-size: 0.9rem;
    }
    
    #studentAudioFilesContainer {
        max-height: 250px !important;
        padding: 0.6rem !important;
        border: 1px solid var(--border-color);
        border-radius: 0.4rem;
        overflow-y: auto;
    }
    
    /* File Preview */
    #studentAudioFilePreview {
        font-size: 0.8rem;
    }
}

/* Extra Small Devices (< 480px) */
@media (max-width: 480px) {
    /* Profile Container */
    .profile-container {
        padding: 0.8rem;
    }
    
    .profile-header {
        margin-bottom: 1rem;
    }
    
    .profile-header i {
        font-size: 2rem;
    }
    
    .profile-header h1 {
        font-size: 1.25rem;
    }
    
    /* Profile Form */
    .profile-form {
        padding: 1rem;
        border-radius: 12px;
    }
    
    /* Photo Preview */
    .photo-preview {
        width: 150px;
        height: 150px;
    }
    
    /* Form Elements */
    .form-group {
        margin-bottom: 0.8rem;
    }
    
    .form-group label {
        font-size: 0.85rem;
        display: flex;
        align-items: center;
        gap: 0.4rem;
    }
    
    .form-group input,
    .form-group textarea {
        font-size: 16px;
        padding: 0.7rem;
        border-radius: 0.4rem;
    }
    
    .form-group textarea {
        min-height: 100px;
    }
    
    /* Audio Section Compact */
    .audio-tabs {
        gap: 0.3rem;
    }
    
    .audio-tab-btn {
        min-width: 100px;
        padding: 0.5rem 0.6rem;
        font-size: 0.75rem;
    }
    
    /* Trim Section Compact */
    .audio-trim-section {
        padding: 0.8rem !important;
    }
    
    .audio-trim-section h4 {
        font-size: 0.9rem !important;
    }
    
    /* Timeline */
    .audio-timeline {
        height: 40px;
    }
    
    /* Buttons */
    .btn-save,
    .btn-upload,
    .btn-small {
        padding: 0.7rem 0.6rem;
        font-size: 0.85rem;
    }
    
    /* Flex Button Groups */
    .btn-small {
        flex: 1;
        min-width: 80px;
    }
    
    /* Help Text */
    .help-text {
        font-size: 0.75rem;
    }
}

/* Tablets (768px - 1024px) */
@media (max-width: 1024px) and (min-width: 769px) {
    .profile-container {
        padding: 1.5rem;
    }
    
    .profile-form {
        padding: 2rem;
    }
    
    .form-grid {
        grid-template-columns: 1fr 1.5fr;
        gap: 2rem;
    }
    
    .photo-preview {
        width: 250px;
        height: 250px;
    }
    
    /* Audio Trim Section - Tablet */
    .audio-trim-section {
        padding: 1rem !important;
    }
    
    .audio-trim-section h4 {
        font-size: 0.95rem !important;
    }
    
    .audio-trim-section .trim-control-group {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 1rem;
    }
    
    .audio-trim-section .audio-timeline {
        height: 60px;
    }
    
    .audio-trim-section .btn-small {
        padding: 0.7rem !important;
        font-size: 0.85rem !important;
    }
    
    /* Tablet Memories Layout */
    .memories-container {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 2rem;
    }
    
    .memory-card.landscape {
        grid-column: span 2;
    }
    
    .memory-card.portrait {
        grid-column: span 1;
        grid-row: span 1;
        display: block;
    }
    
    .memory-card.portrait .memory-frame {
        padding-top: 135%;
        aspect-ratio: auto;
    }
}

/* iPad/Medium Tablets (up to 800px) */
@media (max-width: 800px) and (min-width: 481px) {
    .audio-trim-section {
        padding: 1rem !important;
    }
    
    .audio-trim-section .trim-control-group {
        display: grid;
        grid-template-columns: 1fr;
        gap: 0.8rem;
    }
    
    .audio-trim-section .audio-timeline {
        height: 55px;
    }
}

/* Touch Device Optimizations */
@media (hover: none) and (pointer: coarse) {
    /* Disable hover effects on touch devices */
    .photo-preview:hover {
        transform: none;
    }
    
    .photo-preview:hover .upload-overlay {
        opacity: 0;
    }
    
    .btn-save:hover,
    .btn-upload:hover,
    .btn-small:hover {
        transform: none;
    }
    
    .form-range::-webkit-slider-thumb:hover {
        width: 18px;
        height: 18px;
    }
    
    .form-range::-moz-range-thumb:hover {
        width: 18px;
        height: 18px;
    }
    
    /* Add tap feedback instead */
    button {
        -webkit-tap-highlight-color: rgba(76, 175, 80, 0.1);
    }
}

/* Smooth Transitions for All Elements */
@media (prefers-reduced-motion: no-preference) {
    .profile-form,
    .form-group,
    .audio-section,
    .btn-save,
    .btn-upload,
    .btn-small,
    input,
    textarea {
        transition: all 0.3s ease;
    }
}

/* Prevent zoom on input focus (iOS) */
input,
textarea,
select {
    font-size: 16px !important;
}

@media (max-width: 768px) {
    input,
    textarea,
    select {
        font-size: 16px !important; /* Prevents auto-zoom on iOS */
    }
}

/* Smooth Scroll Behavior */
html {
    scroll-behavior: smooth;
}

/* Global Smooth Transitions */
* {
    transition-property: background-color, border-color, color, fill, stroke, opacity;
    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
    transition-duration: 0.2s;
}

/* Reduced Motion for Accessibility */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
    
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Mobile-specific Smooth Interactions */
@media (hover: none) and (pointer: coarse) {
    /* Reduce motion on touch devices */
    * {
        transition-duration: 0.15s;
    }
    
    /* Add visual feedback for touch interactions */
    button,
    input[type="button"],
    input[type="submit"],
    .btn-save,
    .btn-upload,
    .btn-small,
    .audio-tab-btn {
        -webkit-tap-highlight-color: rgba(76, 175, 80, 0.15);
        -webkit-touch-callout: none;
        user-select: none;
    }
}

/* Focus Management for Accessibility */
button:focus,
input:focus,
textarea:focus,
select:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

@media (hover: none) and (pointer: coarse) {
    button:focus,
    input:focus,
    textarea:focus,
    select:focus {
        outline: none;
        box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.2);
    }
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(100vh);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Audio File List Styles */
.audio-file-item {
    display: flex;
    align-items: center;
    padding: 0.8rem;
    background: var(--bg-color);
    border-radius: 0.4rem;
    margin-bottom: 0.6rem;
    border-left: 3px solid var(--primary-color);
    transition: all 0.3s ease;
    gap: 0.8rem;
    flex-wrap: wrap;
}

.audio-file-item:hover {
    background: var(--light-bg);
    transform: translateX(4px);
}

.audio-file-info {
    flex: 1;
    min-width: 150px;
}

.audio-file-title {
    font-weight: 500;
    color: var(--text-color);
    margin-bottom: 0.2rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    word-break: break-word;
}

.audio-file-title i {
    color: var(--primary-color);
    flex-shrink: 0;
}

.audio-file-meta {
    font-size: 0.85rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.4rem;
    flex-wrap: wrap;
}

.audio-file-meta span {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.audio-file-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.6rem 1rem;
    border-radius: 0.3rem;
    cursor: pointer;
    font-weight: 500;
    font-size: 0.85rem;
    white-space: nowrap;
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.audio-file-btn:hover {
    background: var(--primary-color-dark, #45a049);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(76, 175, 80, 0.3);
}

.audio-file-btn:active {
    transform: translateY(0);
}

.audio-file-btn i {
    margin-right: 0.3rem;
}

/* Audio Files Container */
#studentAudioFilesContainer {
    max-height: 400px !important;
    overflow-y: auto;
    padding: 0.8rem !important;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
}

#studentAudioFilesList {
    margin-top: 1rem !important;
}

#studentAudioFilesList h5 {
    margin: 0 0 0.8rem 0;
    color: var(--text-color);
    font-size: 0.95rem;
}

/* Mobile Responsive - Audio File List */
@media (max-width: 768px) {
    .audio-file-item {
        flex-direction: column;
        align-items: flex-start;
        padding: 0.8rem;
        gap: 0.6rem;
    }
    
    .audio-file-info {
        width: 100%;
        min-width: auto;
    }
    
    .audio-file-btn {
        width: 100%;
        padding: 0.7rem;
        text-align: center;
    }
    
    #studentAudioFilesContainer {
        max-height: 350px !important;
        padding: 0.6rem !important;
    }
}

@media (max-width: 480px) {
    .audio-file-item {
        padding: 0.6rem;
        margin-bottom: 0.5rem;
    }
    
    .audio-file-title {
        font-size: 0.9rem;
    }
    
    .audio-file-meta {
        font-size: 0.75rem;
    }
    
    .audio-file-btn {
        font-size: 0.8rem;
        padding: 0.6rem;
    }
    
    #studentAudioFilesContainer {
        max-height: 300px !important;
        padding: 0.5rem !important;
    }
}

/* ========== VIDEO CAROUSEL STYLES ========== */
.video-gallery-section {
    margin-top: 4rem;
    background: var(--light-bg);
    padding: 4rem;
    border-radius: 15px;
    opacity: 1 !important;
    visibility: visible !important;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

/* Hidden state for video section during loading */
.video-gallery-section.hidden {
    display: none !important;
    opacity: 0 !important;
    visibility: hidden !important;
}

.video-gallery-section h2 {
    margin-bottom: 3rem;
    font-size: 1.8rem;
    color: var(--text-color);
    opacity: 1 !important;
    visibility: visible !important;
}

.video-carousel-container {
    position: relative;
    width: 100%;
    max-width: 3000px;
    margin: 0 auto;
    background: var(--bg-card);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.video-carousel {
    position: relative;
    width: 100%;
    padding-top: 56.25%; /* 16:9 aspect ratio */
    background: #000;
    border-radius: 10px;
    overflow: hidden;
}

.video-carousel video,
.video-carousel-item {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    opacity: 0;
    display: block;
    background: #000;
    /* NO ANIMATION - LET VIDEO PLAY WITHOUT INTERRUPTION */
}

.video-carousel video.active,
.video-carousel-item.active,
.video-carousel-item.active video {
    opacity: 1;
}

#videoContainer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #000;
}

.carousel-control {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.5);
    color: white;
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    transition: all 0.3s ease;
    z-index: 10;
    opacity: 0.7;
}

.carousel-control:hover {
    background: rgba(0, 0, 0, 0.8);
    opacity: 1;
    transform: translateY(-50%) scale(1.1);
}

.carousel-prev {
    left: 1rem;
}

.carousel-next {
    right: 1rem;
}

/* Video Play/Pause Overlay Button */
.video-play-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    background: rgba(0, 0, 0, 0.6);
    border: 3px solid white;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
    z-index: 15;
    transition: all 0.3s ease;
    opacity: 1;
    visibility: visible;
}

.video-play-overlay:hover {
    background: rgba(0, 0, 0, 0.8);
    transform: translate(-50%, -50%) scale(1.1);
    box-shadow: 0 0 30px rgba(255, 255, 255, 0.3);
}

.video-play-overlay.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.video-carousel-item {
    position: relative;
    margin-top: 1rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.95rem;
    opacity: 1 !important;
    visibility: visible !important;
}

.video-carousel-info strong {
    color: var(--text-color);
}

.video-carousel-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-muted);
}

/* Responsive video carousel */
@media (max-width: 768px) {
    .video-gallery-section {
        margin-top: 2rem;
        padding: 0;
        background: transparent;
        border-radius: 0;
        width: 100vw;
        margin-left: calc(-50vw + 50%);
    }
    
    .video-gallery-section h2 {
        display: none;
    }
    
    .video-carousel-container {
        max-width: 100%;
        max-height: 100%;
        margin: 0;
        border-radius: 0;
        box-shadow: none;
        aspect-ratio: auto;
    }
    
    .video-carousel {
        padding-top: 100vh;
        max-height: 100vh;
        position: fixed;
        left: 0;
        right: 0;
        width: 100%;
        background: #000;
        z-index: 100;
    }
    
    #videoContainer {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        max-height: 100vh;
    }
    
    .carousel-control {
        width: 50px;
        height: 50px;
        font-size: 1.4rem;
        z-index: 101;
    }
    
    .carousel-prev {
        left: 1rem;
    }
    
    .carousel-next {
        right: 1rem;
    }
    
    .video-carousel-info {
        position: fixed;
        bottom: 2rem;
        left: 0;
        right: 0;
        text-align: center;
        background: rgba(0, 0, 0, 0.7);
        padding: 1rem;
        margin: 0;
        z-index: 101;
        font-size: 0.85rem;
    }
    
    .video-carousel-info p {
        margin: 0.5rem 0 0 0;
        font-size: 0.8rem;
        color: var(--text-muted);
    }
    
    /* Hide scrollbar on video section */
    .video-carousel-container::-webkit-scrollbar {
        display: none;
    }
    
    /* Better touch targets for mobile */
    .carousel-control {
        -webkit-touch-callout: none;
        -webkit-user-select: none;
    }
}

/* Ultra mobile optimizations */
@media (max-width: 480px) {
    .video-gallery-section {
        margin-top: 1rem;
    }
    
    .video-carousel {
        padding-top: 100vh;
    }
    
    .carousel-control {
        width: 45px;
        height: 45px;
        font-size: 1.2rem;
    }
    
    .carousel-prev {
        left: 0.75rem;
    }
    
    .carousel-next {
        right: 0.75rem;
    }
    
    .video-carousel-info {
        bottom: 1.5rem;
        padding: 0.75rem;
        font-size: 0.75rem;
    }
    
    .video-carousel-info strong {
        display: block;
        margin-bottom: 0.25rem;
    }
}

/* Gallery Upload Form Styles */
#uploadVideoGalleryForm {
    animation: slideInUp 0.5s ease-out;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.form-input-url {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    background: var(--secondary-color);
    color: var(--text-color);
    font-size: 0.95rem;
    margin-bottom: 0.8rem;
}

.form-input-url:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(29, 185, 84, 0.1);
}

.btn-upload {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-upload:hover {
    background: #1aa34a;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(29, 185, 84, 0.3);
}

.btn-save {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
    justify-content: center;
}

.btn-save:hover {
    background: #1aa34a;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(29, 185, 84, 0.3);
}

.btn-small {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.btn-small:hover {
    background: #1aa34a;
}

.btn-danger {
    background: #FF6B6B;
}

.btn-danger:hover {
    background: #ff5252;
}

.help-text {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

/* ========== LYRICS KARAOKE BERANDA STYLES ========== */

.lyrics-karaoke-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.lyrics-karaoke-header i {
    font-size: 1rem;
}

.lyrics-karaoke-display {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    max-height: 300px;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 0.8rem;
    background: var(--light-bg);
    border-radius: 0.5rem;
    border-left: 3px solid var(--primary-color);
    scroll-behavior: smooth;
}

.lyrics-karaoke-display::-webkit-scrollbar {
    width: 6px;
}

.lyrics-karaoke-display::-webkit-scrollbar-track {
    background: var(--border-color);
    border-radius: 3px;
}

.lyrics-karaoke-display::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 3px;
}

.lyrics-karaoke-display::-webkit-scrollbar-thumb:hover {
    background: #1aa34a;
}

.lyric-line {
    padding: 0.6rem 0.8rem;
    border-radius: 0.3rem;
    transition: all 0.2s ease;
    cursor: pointer;
    font-size: 0.9rem;
    line-height: 1.4;
    color: var(--text-secondary);
    background: transparent;
    user-select: text;
}

.lyric-line:hover {
    background: rgba(29, 185, 84, 0.1);
    color: var(--primary-color);
}

.lyric-line.active {
    background: rgba(29, 185, 84, 0.3);
    color: var(--primary-color);
    font-weight: 600;
    border-left: 3px solid var(--primary-color);
    padding-left: 0.5rem;
    transform: translateX(2px);
    box-shadow: 0 2px 8px rgba(29, 185, 84, 0.2);
}

.lyric-line.past {
    opacity: 0.5;
    color: var(--text-muted, #666);
}

.lyrics-empty-message {
    text-align: center;
    padding: 1.5rem;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.lyrics-loading {
    text-align: center;
    padding: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    color: var(--text-secondary);
}

.lyrics-loading-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(29, 185, 84, 0.2);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Image Popup Modal Styles */
.image-popup-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: popupFadeIn 0.3s ease-in-out;
}

@keyframes popupFadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes popupZoomIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.image-popup-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.85);
    cursor: pointer;
    backdrop-filter: blur(4px);
}

.image-popup-container {
    position: relative;
    z-index: 10000;
    max-width: 90vw;
    max-height: 90vh;
    background: var(--bg-dark, #1a1a1a);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.8);
    display: flex;
    flex-direction: column;
    animation: popupZoomIn 0.3s ease-in-out;
}

.image-popup-close {
    position: absolute;
    top: 15px;
    right: 15px;
    z-index: 10001;
    width: 40px;
    height: 40px;
    border: none;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    font-size: 24px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.image-popup-close:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.1);
}

.image-popup-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10001;
    width: 50px;
    height: 50px;
    border: none;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    font-size: 20px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.image-popup-nav:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-50%) scale(1.1);
}

.image-popup-prev {
    left: 15px;
}

.image-popup-next {
    right: 15px;
}

.image-popup-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    overflow: auto;
}

#popupImage {
    max-width: 100%;
    max-height: 70vh;
    object-fit: contain;
    border-radius: 8px;
    animation: popupZoomIn 0.4s ease-in-out;
}

.image-popup-info {
    width: 100%;
    margin-top: 15px;
    padding: 15px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    text-align: center;
    color: white;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.image-popup-info p {
    margin: 5px 0;
    font-size: 14px;
}

.image-popup-info strong {
    color: var(--primary-color, #1DB954);
    font-size: 16px;
}

/* Mobile responsiveness for lyrics */
@media (max-width: 768px) {
    .lyrics-karaoke-display {
        max-height: 200px;
        font-size: 0.85rem;
    }

    .lyric-line {
        padding: 0.5rem 0.6rem;
        font-size: 0.85rem;
    }

    .lyrics-karaoke-header {
        font-size: 0.85rem;
    }

    /* Mobile responsive for image popup */
    .image-popup-modal {
        z-index: 9999;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
    }

    .image-popup-container {
        max-width: 95vw;
        max-height: 85vh;
        width: 95vw;
        height: 85vh;
        border-radius: 8px;
    }

    .image-popup-close {
        width: 36px;
        height: 36px;
        font-size: 20px;
        top: 10px;
        right: 10px;
    }

    .image-popup-nav {
        width: 44px;
        height: 44px;
        font-size: 18px;
    }

    .image-popup-prev {
        left: 8px;
    }

    .image-popup-next {
        right: 8px;
    }

    .image-popup-content {
        padding: 15px;
    }

    #popupImage {
        max-height: 60vh;
        width: auto;
    }

    .image-popup-info {
        margin-top: 10px;
        padding: 10px;
        font-size: 13px;
    }

    .image-popup-info p {
        margin: 3px 0;
        font-size: 12px;
    }

    .image-popup-info strong {
        font-size: 14px;
    }
}

/* Extra small devices */
@media (max-width: 480px) {
    .image-popup-container {
        max-width: 98vw;
        max-height: 90vh;
        width: 98vw;
        height: 90vh;
    }

    .image-popup-close {
        width: 32px;
        height: 32px;
        font-size: 18px;
        top: 8px;
        right: 8px;
    }

    .image-popup-nav {
        width: 40px;
        height: 40px;
        font-size: 16px;
    }

    .image-popup-prev {
        left: 5px;
    }

    .image-popup-next {
        right: 5px;
    }

    .image-popup-content {
        padding: 12px;
    }

    #popupImage {
        max-height: 55vh;
    }

    .image-popup-info {
        margin-top: 8px;
        padding: 8px;
    }

    .image-popup-info p {
        margin: 2px 0;
        font-size: 11px;
    }

    .image-popup-info strong {
        font-size: 12px;
    }
}

/* Spinner for lyrics processing */
.lyrics-karaoke-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(29, 185, 84, 0.2);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spinLyrics 0.8s linear infinite;
}

@keyframes spinLyrics {
    to { transform: rotate(360deg); }
}