/* =============================================
   Music Streaming Admin Panel - Styles
   Modern Dark Theme with Glassmorphism
   ============================================= */

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

/* ---- CSS Variables ---- */
:root {
    --bg-primary: #0a0e1a;
    --bg-secondary: #111827;
    --bg-card: rgba(17, 24, 39, 0.8);
    --bg-card-hover: rgba(31, 41, 55, 0.9);
    --bg-glass: rgba(255, 255, 255, 0.03);
    --bg-input: #1e293b;
    --bg-input-hover: #253347;
    --border-color: rgba(255, 255, 255, 0.06);
    --border-input: rgba(255, 255, 255, 0.10);
    --border-active: rgba(139, 92, 246, 0.5);

    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --text-placeholder: #7a8ba8;

    --accent-primary: #8b5cf6;
    --accent-secondary: #6366f1;
    --accent-gradient: linear-gradient(135deg, #8b5cf6, #6366f1, #3b82f6);
    --accent-glow: rgba(139, 92, 246, 0.15);
    --accent-hover: #7c3aed;

    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.1);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.1);
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.1);
    --info: #3b82f6;
    --info-bg: rgba(59, 130, 246, 0.1);

    --sidebar-width: 260px;
    --header-height: 70px;
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.4);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

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

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(ellipse at 20% 20%, rgba(139, 92, 246, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(59, 130, 246, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(99, 102, 241, 0.04) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

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

a:hover {
    color: var(--accent-hover);
}

img {
    max-width: 100%;
    height: auto;
}

/* ---- Scrollbar ---- */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* ---- Layout ---- */
.app-wrapper {
    display: flex;
    min-height: 100vh;
    position: relative;
    z-index: 1;
}

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.page-content {
    flex: 1;
    padding: 24px 32px;
    margin-top: var(--header-height);
}

/* ---- Sidebar ---- */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: rgba(17, 24, 39, 0.95);
    backdrop-filter: blur(20px);
    border-right: 1px solid var(--border-color);
    z-index: 100;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
    overflow-y: auto;
}

.sidebar-brand {
    padding: 20px 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid var(--border-color);
    min-height: var(--header-height);
}

.sidebar-brand .brand-icon {
    width: 40px;
    height: 40px;
    background: var(--accent-gradient);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
}

.sidebar-brand .brand-text {
    font-size: 18px;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sidebar-nav {
    padding: 16px 12px;
    flex: 1;
}

.nav-section {
    margin-bottom: 24px;
}

.nav-section-title {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    color: var(--text-muted);
    padding: 0 12px;
    margin-bottom: 8px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    margin-bottom: 2px;
    position: relative;
    overflow: hidden;
}

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

.nav-link.active {
    color: var(--text-primary);
    background: var(--accent-glow);
}

.nav-link.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 60%;
    background: var(--accent-gradient);
    border-radius: 0 4px 4px 0;
}

.nav-link i {
    width: 20px;
    text-align: center;
    font-size: 16px;
}

.nav-badge {
    margin-left: auto;
    background: var(--accent-primary);
    color: #fff;
    font-size: 11px;
    padding: 2px 8px;
    border-radius: 10px;
    font-weight: 600;
}

/* ---- Header/Topbar ---- */
.topbar {
    position: fixed;
    top: 0;
    left: var(--sidebar-width);
    right: 0;
    height: var(--header-height);
    background: rgba(10, 14, 26, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 32px;
    z-index: 90;
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.topbar-left h1 {
    font-size: 20px;
    font-weight: 700;
}

.topbar-left .breadcrumb {
    font-size: 13px;
    color: var(--text-muted);
}

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

.topbar-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background: var(--bg-glass);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    font-size: 16px;
}

.topbar-btn:hover {
    background: var(--accent-glow);
    color: var(--text-primary);
    border-color: var(--border-active);
}

.sidebar-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border: none;
    background: var(--bg-glass);
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 18px;
}

/* ---- Cards ---- */
.card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
}

.card:hover {
    border-color: rgba(255, 255, 255, 0.1);
    box-shadow: var(--shadow);
}

.card-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-header h3 {
    font-size: 16px;
    font-weight: 600;
}

.card-body {
    padding: 24px;
}

.card-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
}

/* ---- Stat Cards ---- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 28px;
}

.stat-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 24px;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent-gradient);
    opacity: 0;
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-2px);
    border-color: rgba(255, 255, 255, 0.1);
    box-shadow: var(--shadow);
}

.stat-card:hover::before {
    opacity: 1;
}

.stat-card .stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    margin-bottom: 16px;
}

.stat-card .stat-icon.purple {
    background: rgba(139, 92, 246, 0.12);
    color: #8b5cf6;
}

.stat-card .stat-icon.blue {
    background: rgba(59, 130, 246, 0.12);
    color: #3b82f6;
}

.stat-card .stat-icon.green {
    background: rgba(16, 185, 129, 0.12);
    color: #10b981;
}

.stat-card .stat-icon.orange {
    background: rgba(245, 158, 11, 0.12);
    color: #f59e0b;
}

.stat-card .stat-icon.pink {
    background: rgba(236, 72, 153, 0.12);
    color: #ec4899;
}

.stat-card .stat-icon.cyan {
    background: rgba(6, 182, 212, 0.12);
    color: #06b6d4;
}

.stat-card .stat-value {
    font-size: 28px;
    font-weight: 800;
    margin-bottom: 4px;
    letter-spacing: -0.5px;
}

.stat-card .stat-label {
    font-size: 13px;
    color: var(--text-muted);
    font-weight: 500;
}

.stat-card .stat-trend {
    position: absolute;
    top: 24px;
    right: 24px;
    font-size: 12px;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 20px;
}

.stat-trend.up {
    background: var(--success-bg);
    color: var(--success);
}

.stat-trend.down {
    background: var(--danger-bg);
    color: var(--danger);
}

/* ---- Buttons ---- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    line-height: 1.4;
    white-space: nowrap;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn-primary {
    background: var(--accent-gradient);
    color: #fff;
    border: none;
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
}

.btn-primary:hover {
    box-shadow: 0 6px 20px rgba(139, 92, 246, 0.4);
    color: #fff;
}

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

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.15);
}

.btn-success {
    background: var(--success);
    color: #fff;
}

.btn-danger {
    background: var(--danger);
    color: #fff;
}

.btn-warning {
    background: var(--warning);
    color: #000;
}

.btn-sm {
    padding: 6px 14px;
    font-size: 13px;
}

.btn-lg {
    padding: 14px 28px;
    font-size: 16px;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.btn-outline:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    background: var(--accent-glow);
}

.btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    justify-content: center;
    border-radius: var(--radius-sm);
}

/* ---- Forms ---- */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 8px;
    letter-spacing: 0.3px;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    font-size: 14px;
    font-family: 'Inter', sans-serif;
    background: var(--bg-input);
    border: 1px solid var(--border-input);
    border-radius: var(--radius-sm);
    color: #ffffff;
    transition: var(--transition);
    outline: none;
    line-height: 1.5;
}

.form-control:hover {
    border-color: rgba(255, 255, 255, 0.18);
    background: var(--bg-input-hover);
}

.form-control:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
    background: var(--bg-input-hover);
    color: #ffffff;
}

.form-control::placeholder {
    color: var(--text-placeholder);
    opacity: 1;
}

.form-control:disabled,
.form-control[readonly] {
    background: rgba(30, 41, 59, 0.5);
    color: var(--text-muted);
    cursor: not-allowed;
    opacity: 0.7;
}

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

select.form-control {
    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='%2394a3b8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    background-color: var(--bg-input);
    padding-right: 40px;
    cursor: pointer;
    color: #ffffff;
}

select.form-control option {
    background: #1e293b;
    color: #ffffff;
    padding: 10px;
}

select.form-control option:hover,
select.form-control option:checked {
    background: var(--accent-primary);
    color: #ffffff;
}

input[type="number"].form-control {
    -moz-appearance: textfield;
    appearance: textfield;
}

input[type="number"].form-control::-webkit-outer-spin-button,
input[type="number"].form-control::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.form-check {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    padding: 12px 16px;
    background: var(--bg-input);
    border: 1px solid var(--border-input);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
}

.form-check:hover {
    border-color: rgba(255, 255, 255, 0.18);
    background: var(--bg-input-hover);
}

.form-check label {
    cursor: pointer;
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
    margin: 0;
    user-select: none;
}

.form-check input[type="checkbox"],
.form-check input[type="radio"] {
    width: 20px;
    height: 20px;
    accent-color: var(--accent-primary);
    cursor: pointer;
    flex-shrink: 0;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.form-hint {
    font-size: 12px;
    color: var(--text-placeholder);
    margin-top: 6px;
    display: flex;
    align-items: center;
    gap: 6px;
}

/* Toggle Switch */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 48px;
    height: 26px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 26px;
    transition: var(--transition);
}

.toggle-slider::before {
    content: '';
    position: absolute;
    height: 20px;
    width: 20px;
    left: 3px;
    bottom: 3px;
    background: #fff;
    border-radius: 50%;
    transition: var(--transition);
}

.toggle-switch input:checked + .toggle-slider {
    background: var(--accent-primary);
}

.toggle-switch input:checked + .toggle-slider::before {
    transform: translateX(22px);
}

/* ---- Tables ---- */
.table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius);
}

table {
    width: 100%;
    border-collapse: collapse;
}

table thead th {
    padding: 14px 16px;
    text-align: left;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
}

table tbody tr {
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

table tbody tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

table tbody td {
    padding: 14px 16px;
    font-size: 14px;
    color: var(--text-secondary);
    vertical-align: middle;
}

table tbody td:first-child {
    color: var(--text-primary);
    font-weight: 500;
}

/* ---- Badges ---- */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 600;
    border-radius: 20px;
    line-height: 1.4;
}

.badge-success {
    background: var(--success-bg);
    color: var(--success);
}

.badge-danger {
    background: var(--danger-bg);
    color: var(--danger);
}

.badge-warning {
    background: var(--warning-bg);
    color: var(--warning);
}

.badge-info {
    background: var(--info-bg);
    color: var(--info);
}

.badge-purple {
    background: rgba(139, 92, 246, 0.12);
    color: #8b5cf6;
}

/* ---- Thumbnail ---- */
.thumb {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    object-fit: cover;
    border: 1px solid var(--border-color);
}

.thumb-lg {
    width: 64px;
    height: 64px;
}

.thumb-sm {
    width: 32px;
    height: 32px;
    border-radius: 6px;
}

/* ---- Alerts ---- */
.alert {
    padding: 14px 20px;
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: slideIn 0.3s ease;
}

.alert-success {
    background: var(--success-bg);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.alert-danger {
    background: var(--danger-bg);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.alert-warning {
    background: var(--warning-bg);
    color: var(--warning);
    border: 1px solid rgba(245, 158, 11, 0.2);
}

.alert-info {
    background: var(--info-bg);
    color: var(--info);
    border: 1px solid rgba(59, 130, 246, 0.2);
}

/* ---- Modal ---- */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.2s ease;
}

.modal {
    background: #0f172a;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    animation: scaleIn 0.3s ease;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255,255,255,0.05);
}

.modal-header {
    padding: 24px 28px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(139, 92, 246, 0.03);
}

.modal-header h3 {
    font-size: 18px;
    font-weight: 700;
    color: #ffffff;
    display: flex;
    align-items: center;
    gap: 10px;
}

.modal-close {
    width: 34px;
    height: 34px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.modal-close:hover {
    background: var(--danger-bg);
    color: var(--danger);
    border-color: rgba(239, 68, 68, 0.3);
}

.modal-body {
    padding: 28px;
}

.modal-footer {
    padding: 20px 28px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    background: rgba(255, 255, 255, 0.01);
}

/* ---- Pagination ---- */
.pagination {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 20px;
    justify-content: center;
}

.pagination a,
.pagination span {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.pagination a:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    background: var(--accent-glow);
}

.pagination .active {
    background: var(--accent-gradient);
    border-color: transparent;
    color: #fff;
}

/* ---- Charts Container ---- */
.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 24px;
    margin-bottom: 28px;
}

.chart-container {
    padding: 20px;
    height: 320px;
    position: relative;
}

/* ---- Utility ---- */
.d-flex {
    display: flex;
}

.align-center {
    align-items: center;
}

.justify-between {
    justify-content: space-between;
}

.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.gap-20 { gap: 20px; }

.mb-0 { margin-bottom: 0; }
.mb-12 { margin-bottom: 12px; }
.mb-20 { margin-bottom: 20px; }
.mb-24 { margin-bottom: 24px; }

.mt-0 { margin-top: 0; }
.mt-12 { margin-top: 12px; }
.mt-20 { margin-top: 20px; }

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-muted); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }

.w-100 { width: 100%; }

.hidden { display: none !important; }

/* ---- Empty State ---- */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

.empty-state i {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state h4 {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.empty-state p {
    font-size: 14px;
    max-width: 320px;
    margin: 0 auto;
}

/* ---- Login Page ---- */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    position: relative;
    z-index: 1;
}

.login-card {
    width: 100%;
    max-width: 420px;
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-lg);
}

.login-card .login-header {
    text-align: center;
    margin-bottom: 32px;
}

.login-card .login-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    background: var(--accent-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin: 0 auto 16px;
    box-shadow: 0 8px 25px rgba(139, 92, 246, 0.3);
}

.login-card h2 {
    font-size: 24px;
    font-weight: 800;
    margin-bottom: 4px;
}

.login-card .login-subtitle {
    font-size: 14px;
    color: var(--text-muted);
}

.login-card .btn-primary {
    width: 100%;
    justify-content: center;
    padding: 12px;
    font-size: 15px;
}

/* ---- Song Info Display ---- */
.song-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.song-info .song-title {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 14px;
}

.song-info .song-artist {
    font-size: 12px;
    color: var(--text-muted);
}

/* ---- Tab System ---- */
.tabs {
    display: flex;
    gap: 4px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 24px;
}

.tab-btn {
    padding: 12px 20px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-muted);
    border: none;
    background: none;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: var(--transition);
    font-family: 'Inter', sans-serif;
}

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

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

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

/* ---- Grid Layouts for Settings ---- */
.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.network-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 20px;
    transition: var(--transition);
}

.network-card:hover {
    border-color: rgba(255, 255, 255, 0.1);
}

.network-card .network-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.network-card .network-name {
    font-size: 16px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* ---- File Upload ---- */
.file-upload {
    border: 2px dashed rgba(255, 255, 255, 0.12);
    border-radius: var(--radius);
    padding: 30px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    background: var(--bg-input);
}

.file-upload:hover {
    border-color: var(--accent-primary);
    background: rgba(139, 92, 246, 0.08);
}

.file-upload input[type="file"] {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    opacity: 0;
    cursor: pointer;
}

.file-upload i {
    font-size: 32px;
    color: var(--text-placeholder);
    margin-bottom: 10px;
    display: block;
}

.file-upload p {
    color: var(--text-placeholder);
    font-size: 13px;
    font-weight: 500;
}

.file-upload.has-file {
    border-color: var(--success);
    background: rgba(16, 185, 129, 0.06);
}

.file-upload.has-file p {
    color: var(--success);
}

/* ---- Source Type Selection ---- */
.source-options {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
}

.source-option {
    flex: 1;
    padding: 16px 16px;
    border: 1px solid rgba(255, 255, 255, 0.10);
    border-radius: var(--radius-sm);
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    background: var(--bg-input);
}

.source-option:hover {
    border-color: rgba(255, 255, 255, 0.20);
    background: var(--bg-input-hover);
    color: var(--text-primary);
    transform: translateY(-1px);
}

.source-option.active {
    border-color: var(--accent-primary);
    background: rgba(139, 92, 246, 0.12);
    color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.source-option i {
    display: block;
    font-size: 24px;
    margin-bottom: 8px;
}

/* ---- Keyframes ---- */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* ---- Online Indicator ---- */
.online-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
    margin-right: 4px;
}

.online-dot.active {
    background: var(--success);
    box-shadow: 0 0 6px var(--success);
    animation: pulse 2s infinite;
}

.online-dot.inactive {
    background: var(--text-muted);
}

/* ---- Action Buttons in Table ---- */
.actions {
    display: flex;
    gap: 6px;
}

.actions .btn-icon {
    width: 32px;
    height: 32px;
    font-size: 14px;
}

/* ---- Image Preview ---- */
.image-preview {
    width: 120px;
    height: 120px;
    border-radius: var(--radius);
    border: 2px dashed rgba(255, 255, 255, 0.12);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    margin-bottom: 12px;
    background: var(--bg-input);
    flex-shrink: 0;
    transition: var(--transition);
}

.image-preview:hover {
    border-color: rgba(255, 255, 255, 0.20);
}

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

/* ---- Responsive ---- */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
    }

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

    .main-content {
        margin-left: 0;
    }

    .topbar {
        left: 0;
    }

    .sidebar-toggle {
        display: flex;
    }

    .charts-grid {
        grid-template-columns: 1fr;
    }

    .page-content {
        padding: 20px 16px;
    }
}

@media (max-width: 640px) {
    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .source-options {
        flex-direction: column;
    }

    .topbar {
        padding: 0 16px;
    }

    .login-card {
        padding: 28px;
    }

    .settings-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

/* ---- Loading Spinner ---- */
.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--accent-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 40px auto;
}

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

/* ---- Notification preview ---- */
.notification-preview {
    background: #1f2937;
    border-radius: var(--radius);
    padding: 16px;
    display: flex;
    gap: 12px;
    align-items: flex-start;
    border: 1px solid var(--border-color);
}

.notification-preview .notif-icon {
    width: 40px;
    height: 40px;
    background: var(--accent-gradient);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.notification-preview h5 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 4px;
}

.notification-preview p {
    font-size: 13px;
    color: var(--text-muted);
}

/* ---- Filter bar ---- */
.filter-bar {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 20px;
    transition: var(--transition);
}

.filter-bar:hover {
    border-color: rgba(255, 255, 255, 0.1);
}

.filter-bar-row {
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
}

.filter-bar .search-input {
    position: relative;
    min-width: 240px;
    flex: 1;
}

.filter-bar .search-input i {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 14px;
    pointer-events: none;
    z-index: 1;
}

.filter-bar .search-input .form-control {
    padding-left: 40px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.filter-bar .search-input .form-control:focus {
    background: rgba(255, 255, 255, 0.07);
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

/* Filter Group */
.filter-group {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
}

.filter-select-wrapper {
    position: relative;
}

.filter-select-wrapper .filter-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 12px;
    pointer-events: none;
    z-index: 1;
}

.filter-select-wrapper .filter-select {
    padding-left: 34px;
    padding-right: 36px;
    min-width: 160px;
    max-width: 200px;
    font-size: 13px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition);
}

.filter-select-wrapper .filter-select:hover {
    border-color: rgba(255, 255, 255, 0.15);
    background: rgba(255, 255, 255, 0.06);
}

.filter-select-wrapper .filter-select:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
    background: rgba(255, 255, 255, 0.07);
}

/* Filter Actions */
.filter-actions {
    display: flex;
    gap: 10px;
    align-items: center;
    margin-left: auto;
}

/* Active Filter Tags */
.filter-active-tags {
    display: none;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px solid rgba(255, 255, 255, 0.04);
}

.filter-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 12px;
    font-size: 12px;
    font-weight: 500;
    border-radius: 20px;
    background: var(--accent-glow);
    color: var(--accent-primary);
    border: 1px solid rgba(139, 92, 246, 0.2);
    animation: fadeIn 0.2s ease;
}

.filter-tag i {
    font-size: 10px;
    opacity: 0.7;
}

.filter-tag button {
    background: none;
    border: none;
    color: var(--accent-primary);
    cursor: pointer;
    font-size: 15px;
    line-height: 1;
    padding: 0;
    margin-left: 2px;
    opacity: 0.6;
    transition: var(--transition);
    font-family: 'Inter', sans-serif;
}

.filter-tag button:hover {
    opacity: 1;
    color: var(--danger);
}

/* Table Loading Overlay */
.table-loading-overlay {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 14px 24px;
    margin-bottom: 12px;
    background: rgba(139, 92, 246, 0.08);
    border: 1px solid rgba(139, 92, 246, 0.15);
    border-radius: var(--radius-sm);
    color: var(--accent-primary);
    font-size: 13px;
    font-weight: 500;
    animation: fadeIn 0.2s ease;
}

.loader-pulse {
    display: flex;
    align-items: center;
    justify-content: center;
    animation: pulse 1s ease infinite;
    font-size: 16px;
}

/* Pagination Info */
.card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}

.pagination-info {
    font-size: 13px;
    color: var(--text-muted);
    font-weight: 500;
}

/* ---- Quick Actions ---- */
.quick-actions {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

/* ---- Filter Bar Responsive ---- */
@media (max-width: 1024px) {
    .filter-bar-row {
        flex-direction: column;
        align-items: stretch;
    }

    .filter-bar .search-input {
        min-width: 100%;
    }

    .filter-group {
        flex-wrap: wrap;
    }

    .filter-select-wrapper .filter-select {
        min-width: 140px;
        max-width: none;
        flex: 1;
    }

    .filter-actions {
        margin-left: 0;
        justify-content: flex-end;
    }
}

@media (max-width: 640px) {
    .filter-group {
        flex-direction: column;
    }

    .filter-select-wrapper {
        width: 100%;
    }

    .filter-select-wrapper .filter-select {
        width: 100%;
        max-width: none;
    }

    .filter-actions {
        flex-direction: column;
    }

    .filter-actions .btn {
        width: 100%;
        justify-content: center;
    }
}