/* ============================================================
   MusicHub Dashboard — Design System
   Premium dark theme with glassmorphism & violet/blue accents
   ============================================================ */

/* ─── Google Font ────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ─── CSS Variables ──────────────────────────────────────── */
:root {
    /* Background */
    --bg-primary: hsl(230, 25%, 7%);
    --bg-secondary: hsl(230, 22%, 10%);
    --bg-tertiary: hsl(230, 20%, 13%);
    --bg-elevated: hsl(230, 18%, 16%);

    /* Glass */
    --glass-bg: rgba(255, 255, 255, 0.04);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-hover: rgba(255, 255, 255, 0.08);

    /* Text */
    --text-primary: hsl(0, 0%, 95%);
    --text-secondary: hsl(230, 10%, 65%);
    --text-muted: hsl(230, 10%, 45%);

    /* Accent */
    --accent-primary: hsl(265, 85%, 60%);
    --accent-secondary: hsl(220, 90%, 58%);
    --accent-gradient: linear-gradient(135deg, hsl(265, 85%, 60%), hsl(220, 90%, 58%));
    --accent-glow: 0 0 20px hsla(265, 85%, 60%, 0.3);

    /* Status */
    --success: hsl(150, 75%, 48%);
    --error: hsl(0, 80%, 60%);
    --warning: hsl(40, 90%, 55%);
    --info: hsl(210, 80%, 58%);

    /* Sizing */
    --sidebar-width: 260px;
    --header-height: 64px;
    --player-height: 80px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;
}

/* ─── Reset & Base ───────────────────────────────────────── */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow: hidden;
    height: 100vh;
    width: 100vw;
}

a { color: var(--accent-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

input, select, textarea, button {
    font-family: inherit;
    font-size: inherit;
}

/* ─── Scrollbar ──────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover { background: rgba(255, 255, 255, 0.25); }

/* ─── Screens ────────────────────────────────────────────── */
.screen {
    position: absolute;
    inset: 0;
    display: none;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.screen.visible {
    display: flex;
    opacity: 1;
}

/* ============================================================
   LANDING SCREEN
   ============================================================ */
.landing-screen {
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    overflow: hidden;
}

.landing-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
    z-index: 0;
}

.landing-bg::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(ellipse at 30% 20%, hsla(265, 80%, 50%, 0.12) 0%, transparent 50%),
                radial-gradient(ellipse at 70% 80%, hsla(220, 80%, 50%, 0.08) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 50%, hsla(300, 60%, 40%, 0.05) 0%, transparent 40%);
    animation: bgPulse 8s ease-in-out infinite alternate;
}

@keyframes bgPulse {
    0% { transform: scale(1) rotate(0deg); }
    100% { transform: scale(1.1) rotate(5deg); }
}

/* Floating music notes */
.landing-notes {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.note {
    position: absolute;
    font-size: 1.5rem;
    opacity: 0.08;
    animation: floatNote 20s linear infinite;
}

@keyframes floatNote {
    0% { transform: translateY(100vh) rotate(0deg); opacity: 0; }
    10% { opacity: 0.08; }
    90% { opacity: 0.08; }
    100% { transform: translateY(-100px) rotate(360deg); opacity: 0; }
}

.landing-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 2rem;
}

.landing-logo {
    font-size: 4rem;
    margin-bottom: 0.5rem;
    animation: logoPulse 2s ease-in-out infinite;
}

@keyframes logoPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.landing-title {
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}

.landing-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    font-weight: 300;
}

.login-btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 16px 40px;
    background: var(--accent-gradient);
    color: white;
    border: none;
    border-radius: var(--radius-xl);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--accent-glow);
    position: relative;
    overflow: hidden;
}

.login-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.2), transparent);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 40px hsla(265, 85%, 60%, 0.4);
}

.login-btn:hover::before { opacity: 1; }

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

.login-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.login-btn.loading .login-btn-text { opacity: 0; }

.login-btn .google-icon {
    width: 24px;
    height: 24px;
}

.landing-footer {
    position: absolute;
    bottom: 2rem;
    color: var(--text-muted);
    font-size: 0.85rem;
    z-index: 1;
}

/* ============================================================
   REQUEST ACCESS SCREEN
   ============================================================ */
.request-screen, .pending-screen {
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    padding: 2rem;
}

.request-card-container, .pending-card-container {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    max-width: 480px;
    width: 100%;
    backdrop-filter: blur(20px);
    animation: fadeInUp 0.5s ease;
}

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

.request-title, .pending-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.request-subtitle {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    font-size: 0.95rem;
}

.pending-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.pending-message {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.pending-status {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: hsla(40, 90%, 55%, 0.1);
    border: 1px solid hsla(40, 90%, 55%, 0.2);
    border-radius: var(--radius-xl);
    color: var(--warning);
    font-weight: 500;
    margin-bottom: 2rem;
}

/* ─── Forms ──────────────────────────────────────────────── */
.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.form-input, .form-select, .form-textarea {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: border-color var(--transition-fast);
    outline: none;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px hsla(265, 85%, 60%, 0.15);
}

.form-textarea {
    resize: vertical;
    min-height: 80px;
}

.form-select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23888' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

.form-select-sm {
    padding: 6px 30px 6px 10px;
    font-size: 0.85rem;
}

.form-input-readonly {
    opacity: 0.6;
    cursor: not-allowed;
}

/* ─── Buttons ────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 24px;
    border: none;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn:active { transform: scale(0.97); }

.btn-primary {
    background: var(--accent-gradient);
    color: white;
}

.btn-primary:hover {
    box-shadow: var(--accent-glow);
    transform: translateY(-1px);
}

.btn-success {
    background: hsla(150, 75%, 48%, 0.15);
    color: var(--success);
    border: 1px solid hsla(150, 75%, 48%, 0.3);
}
.btn-success:hover { background: hsla(150, 75%, 48%, 0.25); }

.btn-danger {
    background: hsla(0, 80%, 60%, 0.15);
    color: var(--error);
    border: 1px solid hsla(0, 80%, 60%, 0.3);
}
.btn-danger:hover { background: hsla(0, 80%, 60%, 0.25); }

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--glass-border);
}
.btn-ghost:hover {
    background: var(--glass-hover);
    color: var(--text-primary);
}

.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: none;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 1.1rem;
}

.btn-icon:hover {
    background: var(--glass-hover);
    color: var(--text-primary);
    transform: scale(1.1);
}

/* ============================================================
   DASHBOARD LAYOUT
   ============================================================ */
.dashboard-screen {
    flex-direction: column;
    background: var(--bg-primary);
}

/* ─── Header ─────────────────────────────────────────────── */
.header {
    height: var(--header-height);
    display: flex;
    align-items: center;
    padding: 0 1.5rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--glass-border);
    gap: 1rem;
    z-index: 100;
    flex-shrink: 0;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.sidebar-toggle-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 4px;
}

.app-logo {
    font-size: 1.5rem;
}

.app-title {
    font-size: 1.2rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-center {
    flex: 1;
    max-width: 500px;
    margin: 0 auto;
}

.search-box {
    position: relative;
    width: 100%;
}

.search-box input {
    width: 100%;
    padding: 10px 16px 10px 42px;
    background: var(--bg-tertiary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    color: var(--text-primary);
    font-size: 0.9rem;
    outline: none;
    transition: all var(--transition-fast);
}

.search-box input:focus {
    border-color: var(--accent-primary);
    background: var(--bg-elevated);
}

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

.search-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 1rem;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.notification-btn {
    position: relative;
}

.notification-badge {
    position: absolute;
    top: -4px;
    right: -4px;
    min-width: 18px;
    height: 18px;
    background: var(--error);
    color: white;
    font-size: 0.7rem;
    font-weight: 700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 4px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 12px;
    border-radius: var(--radius-xl);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.user-info:hover { background: var(--glass-hover); }

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--glass-border);
}

.user-name {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
}

/* ─── Main Layout ────────────────────────────────────────── */
.dashboard-body {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* ─── Sidebar ────────────────────────────────────────────── */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--glass-border);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    flex-shrink: 0;
    transition: transform var(--transition-normal);
}

.sidebar-section {
    padding: 1rem 0.75rem;
}

.sidebar-section-title {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    padding: 0 0.75rem;
    margin-bottom: 0.5rem;
}

.sidebar-folder {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.sidebar-folder:hover {
    background: var(--glass-hover);
    color: var(--text-primary);
}

.sidebar-folder.active {
    background: hsla(265, 85%, 60%, 0.12);
    color: var(--accent-primary);
}

.folder-icon { font-size: 1rem; }
.folder-name { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* Admin sidebar section */
.admin-sidebar {
    display: none;
    border-top: 1px solid var(--glass-border);
}

.admin-sidebar.visible { display: block; }

.admin-nav-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--text-secondary);
    font-size: 0.9rem;
    position: relative;
}

.admin-nav-link:hover {
    background: var(--glass-hover);
    color: var(--text-primary);
}

.admin-nav-badge {
    margin-left: auto;
    min-width: 20px;
    height: 20px;
    background: var(--error);
    color: white;
    font-size: 0.7rem;
    font-weight: 700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 5px;
}

/* ─── Main Content ───────────────────────────────────────── */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.content-panel {
    display: none;
    flex-direction: column;
    flex: 1;
    overflow: hidden;
}

.content-panel.visible {
    display: flex;
}

/* ─── Toolbar ────────────────────────────────────────────── */
.toolbar {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 1.5rem;
    border-bottom: 1px solid var(--glass-border);
    flex-wrap: wrap;
}

/* Breadcrumbs */
.breadcrumbs {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.85rem;
    color: var(--text-muted);
    flex: 1;
    min-width: 0;
    overflow: hidden;
}

.breadcrumb-item {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.breadcrumb-item.clickable {
    cursor: pointer;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.breadcrumb-item.clickable:hover { color: var(--accent-primary); }

.breadcrumb-item.current {
    color: var(--text-primary);
    font-weight: 500;
}

.breadcrumb-separator { color: var(--text-muted); margin: 0 2px; }

/* Filters & View toggles */
.toolbar-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.filter-group {
    display: flex;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid var(--glass-border);
}

.filter-btn {
    padding: 6px 14px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 0.82rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.filter-btn:hover { color: var(--text-primary); background: var(--glass-hover); }

.filter-btn.active {
    background: var(--accent-gradient);
    color: white;
}

.filter-count {
    font-size: 0.75rem;
    opacity: 0.7;
    margin-left: 4px;
}

.view-toggle {
    display: flex;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid var(--glass-border);
}

.view-toggle-btn {
    padding: 6px 10px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 1rem;
}

.view-toggle-btn:hover { color: var(--text-primary); }
.view-toggle-btn.active { background: var(--glass-hover); color: var(--text-primary); }

.create-folder-btn {
    display: none;
}

.create-folder-btn.visible {
    display: inline-flex;
}

/* ─── File Grid ──────────────────────────────────────────── */
.files-area {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
}

.file-container.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1rem;
}

.file-container.list {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

/* Grid card */
.file-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    text-align: center;
    transition: all var(--transition-normal);
    animation: fadeIn 0.4s ease backwards;
    position: relative;
    overflow: hidden;
}

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

.file-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--accent-gradient);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.file-card:hover {
    border-color: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.file-card:hover::before { opacity: 0.03; }

.file-card.clickable { cursor: pointer; }

.file-card.playing {
    border-color: var(--accent-primary);
    box-shadow: 0 0 20px hsla(265, 85%, 60%, 0.15);
}

.file-card-icon {
    font-size: 2.5rem;
    margin-bottom: 0.75rem;
}

.file-card-icon.folder { filter: saturate(1.5); }

.file-card-name {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 0.25rem;
}

.file-card-meta {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.file-card-actions {
    display: flex;
    justify-content: center;
    gap: 4px;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.file-card:hover .file-card-actions { opacity: 1; }

/* List view */
.file-container.list .file-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    text-align: left;
}

.file-container.list .file-card-icon { font-size: 1.3rem; margin-bottom: 0; }
.file-container.list .file-card-name { flex: 1; margin-bottom: 0; }
.file-container.list .file-card-meta { margin-bottom: 0; min-width: 70px; }
.file-container.list .file-card-actions { opacity: 1; }

.file-list-icon { font-size: 1.3rem; width: 30px; text-align: center; }
.file-list-name { flex: 1; font-size: 0.9rem; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.file-list-size { font-size: 0.8rem; color: var(--text-muted); min-width: 60px; }
.file-list-date { font-size: 0.8rem; color: var(--text-muted); min-width: 70px; }
.file-list-actions { display: flex; gap: 4px; }

/* ─── Empty State ────────────────────────────────────────── */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4rem 2rem;
    text-align: center;
    grid-column: 1 / -1;
}

.empty-icon { font-size: 3rem; margin-bottom: 1rem; opacity: 0.5; }
.empty-state h3 { color: var(--text-secondary); margin-bottom: 0.5rem; font-weight: 600; }
.empty-state p { color: var(--text-muted); font-size: 0.9rem; }

/* ─── Skeleton Loading ───────────────────────────────────── */
.file-card.skeleton {
    background: var(--glass-bg);
    pointer-events: none;
}

.skeleton-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    background: var(--bg-elevated);
    margin: 0 auto 0.75rem;
    animation: skeletonPulse 1.5s ease-in-out infinite;
}

.skeleton-text {
    height: 12px;
    background: var(--bg-elevated);
    border-radius: 4px;
    margin-bottom: 0.5rem;
    animation: skeletonPulse 1.5s ease-in-out infinite;
}

.skeleton-text.short { width: 60%; margin: 0 auto; }

@keyframes skeletonPulse {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 0.8; }
}

/* ============================================================
   PLAYER BAR
   ============================================================ */
.player-bar {
    height: var(--player-height);
    background: var(--bg-secondary);
    border-top: 1px solid var(--glass-border);
    display: none;
    align-items: center;
    padding: 0 1.5rem;
    gap: 1rem;
    flex-shrink: 0;
    z-index: 100;
}

.player-bar.visible { display: flex; }

.player-bar.playing {
    border-top-color: var(--accent-primary);
    box-shadow: 0 -4px 20px hsla(265, 85%, 60%, 0.1);
}

.player-track-info {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 200px;
    max-width: 280px;
}

.player-visualizer {
    display: flex;
    align-items: flex-end;
    gap: 2px;
    height: 24px;
}

.player-visualizer .bar {
    width: 3px;
    background: var(--accent-gradient);
    border-radius: 1px;
    transition: height 0.3s ease;
    height: 4px;
}

.player-visualizer.active .bar {
    animation: visualizerBounce 0.6s ease-in-out infinite alternate;
}

.player-visualizer.active .bar:nth-child(1) { animation-delay: 0s; }
.player-visualizer.active .bar:nth-child(2) { animation-delay: 0.1s; }
.player-visualizer.active .bar:nth-child(3) { animation-delay: 0.2s; }
.player-visualizer.active .bar:nth-child(4) { animation-delay: 0.15s; }
.player-visualizer.active .bar:nth-child(5) { animation-delay: 0.05s; }

@keyframes visualizerBounce {
    0% { height: 4px; }
    100% { height: 20px; }
}

.player-track-text {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.player-track-name {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.player-track-artist {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.player-controls {
    display: flex;
    align-items: center;
    gap: 8px;
}

.player-controls .btn-icon {
    width: 40px;
    height: 40px;
}

.player-controls .btn-icon svg {
    width: 18px;
    height: 18px;
}

.player-play-main {
    width: 48px !important;
    height: 48px !important;
    background: var(--accent-gradient) !important;
    color: white !important;
    border-radius: 50% !important;
    box-shadow: var(--accent-glow);
}

.player-play-main:hover {
    transform: scale(1.1) !important;
    box-shadow: 0 0 30px hsla(265, 85%, 60%, 0.4);
}

.player-play-main svg {
    width: 20px !important;
    height: 20px !important;
}

.player-progress-section {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 10px;
}

.player-time {
    font-size: 0.75rem;
    color: var(--text-muted);
    min-width: 40px;
    font-variant-numeric: tabular-nums;
}

.player-progress-bar {
    flex: 1;
    height: 4px;
    background: var(--bg-elevated);
    border-radius: 2px;
    cursor: pointer;
    position: relative;
    transition: height var(--transition-fast);
}

.player-progress-bar:hover { height: 6px; }

.player-progress-filled {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: 2px;
    width: 0%;
    position: relative;
    transition: width 0.1s linear;
}

.player-progress-filled::after {
    content: '';
    position: absolute;
    right: -5px;
    top: 50%;
    transform: translateY(-50%);
    width: 12px;
    height: 12px;
    background: white;
    border-radius: 50%;
    opacity: 0;
    transition: opacity var(--transition-fast);
    box-shadow: 0 0 6px rgba(0,0,0,0.3);
}

.player-progress-bar:hover .player-progress-filled::after { opacity: 1; }

.player-volume {
    display: flex;
    align-items: center;
    gap: 8px;
}

.player-volume-slider {
    width: 80px;
    -webkit-appearance: none;
    height: 4px;
    background: var(--bg-elevated);
    border-radius: 2px;
    outline: none;
}

.player-volume-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    background: white;
    border-radius: 50%;
    cursor: pointer;
}

/* ============================================================
   ADMIN PANEL
   ============================================================ */
.admin-panel-content {
    padding: 1.5rem;
    overflow-y: auto;
    flex: 1;
}

.admin-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.admin-title {
    font-size: 1.3rem;
    font-weight: 700;
}

.admin-tabs {
    display: flex;
    gap: 4px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    padding: 4px;
    margin-bottom: 1.5rem;
    border: 1px solid var(--glass-border);
}

.admin-tab-btn {
    padding: 8px 20px;
    background: transparent;
    border: none;
    border-radius: 6px;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

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

.admin-tab-btn.active {
    background: var(--accent-gradient);
    color: white;
}

.admin-tab-content {
    display: none;
}

.admin-tab-content.visible { display: block; }

.admin-loading, .admin-error {
    padding: 2rem;
    text-align: center;
    color: var(--text-muted);
}

.admin-error { color: var(--error); }

/* Request cards */
.request-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    margin-bottom: 1rem;
    transition: all var(--transition-normal);
}

.request-card.pendente { border-left: 3px solid var(--warning); }
.request-card.aprovado { border-left: 3px solid var(--success); opacity: 0.6; }
.request-card.recusado { border-left: 3px solid var(--error); opacity: 0.6; }

.request-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.request-status {
    font-size: 0.85rem;
    font-weight: 600;
}

.request-status.pendente { color: var(--warning); }
.request-status.aprovado { color: var(--success); }
.request-status.recusado { color: var(--error); }

.request-info > div {
    margin-bottom: 0.4rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.request-name { color: var(--text-primary) !important; font-weight: 600; font-size: 1rem !important; }
.request-message { font-style: italic; color: var(--text-muted) !important; }

.request-actions {
    margin-top: 1.25rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--glass-border);
}

.request-buttons {
    display: flex;
    gap: 0.75rem;
    margin-top: 1rem;
}

/* Members table */
.members-table {
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.members-header {
    display: grid;
    grid-template-columns: 1.5fr 2fr 1fr 1fr 0.8fr;
    padding: 12px 16px;
    background: var(--bg-tertiary);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.member-row {
    display: grid;
    grid-template-columns: 1.5fr 2fr 1fr 1fr 0.8fr;
    padding: 12px 16px;
    align-items: center;
    border-top: 1px solid var(--glass-border);
    font-size: 0.9rem;
    transition: background var(--transition-fast);
}

.member-row:hover { background: var(--glass-hover); }
.member-email { color: var(--text-secondary); font-size: 0.85rem; }
.member-actions { display: flex; gap: 4px; }

/* Config */
.config-section {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.config-section-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.config-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* ============================================================
   PDF VIEWER OVERLAY
   ============================================================ */
.pdf-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.9);
    z-index: 1000;
    display: none;
    flex-direction: column;
    backdrop-filter: blur(10px);
}

.pdf-overlay.visible { display: flex; }

.pdf-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 1.5rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--glass-border);
}

.pdf-toolbar-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.pdf-file-name {
    font-weight: 600;
    font-size: 0.95rem;
}

.pdf-toolbar-center {
    display: flex;
    align-items: center;
    gap: 8px;
}

.pdf-page-info {
    font-size: 0.85rem;
    color: var(--text-secondary);
    min-width: 60px;
    text-align: center;
}

.pdf-canvas-container {
    flex: 1;
    overflow: auto;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 2rem;
}

.pdf-canvas-container canvas {
    max-width: 100%;
    box-shadow: 0 4px 40px rgba(0, 0, 0, 0.5);
    border-radius: 4px;
}

.pdf-loading {
    position: absolute;
    inset: 0;
    display: none;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.5);
}

.pdf-loading.visible { display: flex; }

/* ============================================================
   MODAL
   ============================================================ */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 900;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    backdrop-filter: blur(5px);
}

.modal-overlay.visible { display: flex; }

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    max-width: 480px;
    width: 100%;
    animation: fadeInUp 0.3s ease;
}

.modal-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
}

.modal-body { margin-bottom: 1.5rem; }

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}

/* ============================================================
   TOASTS
   ============================================================ */
.toast-container {
    position: fixed;
    bottom: 100px;
    right: 1.5rem;
    z-index: 2000;
    display: flex;
    flex-direction: column-reverse;
    gap: 0.5rem;
}

.toast {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    font-size: 0.9rem;
    opacity: 0;
    transform: translateX(100px);
    transition: all var(--transition-normal);
    backdrop-filter: blur(10px);
}

.toast.visible {
    opacity: 1;
    transform: translateX(0);
}

.toast-success { border-left: 3px solid var(--success); }
.toast-error { border-left: 3px solid var(--error); }
.toast-warning { border-left: 3px solid var(--warning); }
.toast-info { border-left: 3px solid var(--info); }

.toast-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0 4px;
    margin-left: 8px;
}

/* ============================================================
   LOADING OVERLAY
   ============================================================ */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 800;
    display: none;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(5px);
}

.loading-overlay.visible { display: flex; }

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--glass-border);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
    .sidebar {
        position: fixed;
        top: var(--header-height);
        left: 0;
        bottom: 0;
        z-index: 200;
        transform: translateX(-100%);
    }

    .sidebar.open { transform: translateX(0); }

    .sidebar-toggle-btn { display: block; }

    .file-container.grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }

    .header-center { display: none; }

    .members-header, .member-row {
        grid-template-columns: 1.5fr 2fr 1fr 0.8fr;
    }
    .member-instrument { display: none; }
}

@media (max-width: 640px) {
    .landing-title { font-size: 1.8rem; }
    .login-btn { padding: 14px 32px; font-size: 1rem; }

    .file-container.grid {
        grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
        gap: 0.75rem;
    }

    .toolbar { padding: 0.5rem 1rem; }
    .files-area { padding: 1rem; }

    .player-track-info { min-width: 120px; max-width: 150px; }
    .player-volume { display: none; }

    .members-header, .member-row {
        grid-template-columns: 1.5fr 2fr 0.8fr;
    }
    .member-instrument, .member-email { display: none; }

    .request-card-container, .pending-card-container {
        padding: 1.5rem;
    }
}

/* ============================================================
   MULTI-LIBRARIES & THEMATIC CARDS
   ============================================================ */
.hidden-during-libraries {
    display: none !important;
}

/* Libraries Grid Container */
.file-container.libraries-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    padding: 0.5rem 0;
}

/* Library Card */
.library-card {
    position: relative;
    background: linear-gradient(135deg, rgba(25, 20, 45, 0.7) 0%, rgba(18, 14, 33, 0.9) 100%);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: var(--radius-lg);
    padding: 1.75rem 1.5rem 1.25rem;
    cursor: pointer;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 200px;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    backdrop-filter: blur(12px);
    box-shadow: 0 8px 24px -6px rgba(0, 0, 0, 0.4);
}

.library-card-glow {
    position: absolute;
    top: -50px;
    right: -50px;
    width: 140px;
    height: 140px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.25) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    transition: transform 0.4s ease, opacity 0.4s ease;
    opacity: 0.6;
}

.library-card:hover {
    transform: translateY(-5px) scale(1.01);
    border-color: rgba(167, 139, 250, 0.5);
    box-shadow: 0 16px 36px -8px rgba(139, 92, 246, 0.25), 0 0 0 1px rgba(167, 139, 250, 0.2);
}

.library-card:hover .library-card-glow {
    transform: scale(1.4);
    opacity: 1;
}

.library-card-icon {
    font-size: 2.8rem;
    line-height: 1;
    margin-bottom: 1.25rem;
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(139, 92, 246, 0.12);
    border: 1px solid rgba(139, 92, 246, 0.25);
    border-radius: var(--radius-md);
    box-shadow: inset 0 0 12px rgba(139, 92, 246, 0.15);
    transition: transform 0.3s ease;
}

.library-card:hover .library-card-icon {
    transform: scale(1.08) rotate(3deg);
    background: rgba(139, 92, 246, 0.22);
}

.library-card-content {
    flex: 1;
}

.library-card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.4rem;
    line-height: 1.3;
    letter-spacing: -0.01em;
}

.library-card-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.4;
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.library-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 1.25rem;
    padding-top: 0.85rem;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.library-card-badge {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--accent-light, #c4b5fd);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.library-card-arrow {
    font-size: 1rem;
    color: var(--text-muted);
    transition: transform 0.2s ease, color 0.2s ease;
}

.library-card:hover .library-card-arrow {
    transform: translateX(4px);
    color: var(--accent-light, #c4b5fd);
}

/* Sidebar Libraries Section */
.sidebar-lib-item {
    font-weight: 500;
}

.sidebar-lib-item.active {
    background: rgba(139, 92, 246, 0.15);
    color: var(--text-primary);
    border-left: 3px solid #8b5cf6;
}

/* Admin Multi-Libraries Manager */
.library-add-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.form-row {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.form-row .flex-2 { flex: 2; }
.form-row .flex-1 { flex: 1; }

.icon-selector {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 4px;
}

.icon-choice {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--glass-border);
    cursor: pointer;
    font-size: 1.1rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.icon-choice:hover {
    background: rgba(139, 92, 246, 0.15);
    border-color: rgba(139, 92, 246, 0.4);
    transform: scale(1.08);
}

.icon-choice.active {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.4) 0%, rgba(99, 102, 241, 0.4) 100%);
    border-color: var(--accent-primary, #8b5cf6);
    box-shadow: 0 0 10px rgba(139, 92, 246, 0.3);
}

.admin-libraries-section {
    margin-top: 1.5rem;
}

.admin-libraries-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.admin-libraries-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.admin-libraries-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.admin-lib-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 1rem 1.25rem;
    transition: all var(--transition-fast);
}

.admin-lib-item:hover {
    border-color: rgba(139, 92, 246, 0.3);
    background: var(--glass-hover);
}

.admin-lib-icon {
    font-size: 2rem;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    background: rgba(139, 92, 246, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.admin-lib-info {
    flex: 1;
    min-width: 0;
}

.admin-lib-name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1rem;
    margin-bottom: 2px;
}

.admin-lib-desc {
    font-size: 0.8rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 2px;
}

.admin-lib-meta code {
    font-size: 0.72rem;
    color: var(--accent-light, #c4b5fd);
    background: rgba(0, 0, 0, 0.3);
    padding: 2px 6px;
    border-radius: 4px;
}

.admin-lib-actions {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    flex-shrink: 0;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.8rem;
}