/**
 * YT Media Vault - Core Application Stylesheet
 * Vanilla CSS - Glassmorphism, Luxury Dark Mode & Mobile PWA
 */

:root {
    --bg-main: #090d16;
    --bg-surface: #0f172a;
    --bg-card: rgba(17, 24, 39, 0.7);
    --bg-card-hover: rgba(30, 41, 59, 0.75);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-focus: rgba(99, 102, 241, 0.5);

    --primary: #6366f1;
    --primary-light: #818cf8;
    --primary-glow: rgba(99, 102, 241, 0.35);
    
    --accent: #06b6d4;
    --accent-glow: rgba(6, 182, 212, 0.3);

    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;

    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-full: 9999px;

    --header-height: 70px;
    --player-height: 80px;
    --mobile-nav-height: 64px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

body {
    background-color: var(--bg-main);
    background-image: 
        radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.12) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(6, 182, 212, 0.08) 0px, transparent 50%);
    background-attachment: fixed;
    color: var(--text-primary);
    font-family: var(--font-sans);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    padding-bottom: calc(var(--player-height) + 20px);
}

@media (max-width: 768px) {
    body {
        padding-bottom: calc(var(--player-height) + var(--mobile-nav-height) + 16px);
    }
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-main);
}
::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* Header & Navigation */
.header {
    height: var(--header-height);
    background: rgba(11, 15, 25, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 28px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 14px;
    text-decoration: none;
    color: var(--text-primary);
}

.brand-icon {
    width: 38px;
    height: 38px;
    border-radius: var(--radius-md);
    box-shadow: 0 0 15px var(--primary-glow);
}

.brand-text h1 {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, #ffffff, var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.brand-text p {
    font-size: 11px;
    color: var(--text-muted);
}

.nav-tabs {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(17, 24, 39, 0.6);
    padding: 4px;
    border-radius: var(--radius-full);
    border: 1px solid var(--border-color);
}

.nav-tab {
    padding: 8px 18px;
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    background: transparent;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

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

.nav-tab.active {
    background: var(--primary);
    color: #ffffff;
    box-shadow: 0 0 14px var(--primary-glow);
}

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

/* Login Screen */
.login-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - var(--header-height) - 100px);
    padding: 20px 0;
}

.login-card {
    max-width: 420px;
    width: 100%;
    padding: 36px 30px;
    background: rgba(17, 24, 39, 0.85);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--border-color);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.6), 0 0 25px var(--primary-glow);
    border-radius: var(--radius-lg);
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 28px;
    width: 100%;
}

@media (max-width: 768px) {
    .container {
        padding: 16px;
    }
    .header {
        padding: 0 16px;
    }
    .nav-tabs {
        display: none; /* Auf Mobilgeräten übernimmt die Bottom Navigation */
    }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius-md);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), #4f46e5);
    color: #ffffff;
    box-shadow: 0 4px 15px var(--primary-glow);
}
.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px var(--primary-glow);
}

.btn-accent {
    background: linear-gradient(135deg, var(--accent), #0891b2);
    color: #ffffff;
    box-shadow: 0 4px 15px var(--accent-glow);
}
.btn-accent:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px var(--accent-glow);
}

.btn-outline {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}
.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
}

.btn-danger {
    background: rgba(239, 68, 68, 0.15);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.3);
}
.btn-danger:hover {
    background: #ef4444;
    color: #ffffff;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
    border-radius: var(--radius-sm);
}

/* Glass Cards */
.card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.card-title {
    font-size: 17px;
    font-weight: 700;
    letter-spacing: -0.3px;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* Stats Grid & Modern Dashboard Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 18px;
    margin-bottom: 26px;
}

.stat-card {
    background: rgba(17, 24, 39, 0.75);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px 22px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 135px;
    transition: all 0.25s ease;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.35);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
    opacity: 0;
    transition: opacity 0.3s;
}

.stat-card:hover {
    transform: translateY(-3px);
    border-color: rgba(99, 102, 241, 0.4);
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.5), 0 0 15px var(--primary-glow);
}

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

.stat-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.stat-label {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--text-muted);
}

.stat-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    background: rgba(99, 102, 241, 0.12);
    border: 1px solid rgba(99, 102, 241, 0.25);
    color: var(--primary-light);
}

.stat-card-body {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 22px;
    font-weight: 800;
    color: #ffffff;
    letter-spacing: -0.4px;
    line-height: 1.2;
    margin-bottom: 6px;
}

.stat-subtext {
    font-size: 12px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 6px;
}

.stat-progress {
    width: 100%;
    height: 5px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-bottom: 8px;
}

.stat-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: var(--radius-full);
    transition: width 0.4s ease;
}

/* Quick Download Bar */
.download-bar {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid var(--border-color);
    padding: 8px;
    border-radius: var(--radius-lg);
}

.download-bar input[type="text"] {
    flex: 1;
    min-width: 260px;
    background: transparent;
    border: none;
    padding: 12px 18px;
    color: #ffffff;
    font-size: 14px;
    outline: none;
}

.download-bar select {
    background: rgba(30, 41, 59, 0.8);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: #ffffff;
    padding: 8px 14px;
    font-size: 13px;
    outline: none;
    cursor: pointer;
}

/* Form Controls */
.form-group {
    margin-bottom: 16px;
}
.form-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-secondary);
}
.form-control {
    width: 100%;
    background: rgba(30, 41, 59, 0.7);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 10px 16px;
    color: #ffffff;
    font-size: 14px;
    outline: none;
    transition: border-color 0.2s;
}
.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 10px var(--primary-glow);
}

/* Tables */
.table-responsive {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

th {
    padding: 12px 16px;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-color);
}

td {
    padding: 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    font-size: 13px;
    vertical-align: middle;
}

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

/* Media Type Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-size: 11px;
    font-weight: 700;
}
.badge-audio {
    background: rgba(139, 92, 246, 0.2);
    color: #a78bfa;
    border: 1px solid rgba(139, 92, 246, 0.4);
}
.badge-video {
    background: rgba(6, 182, 212, 0.2);
    color: #22d3ee;
    border: 1px solid rgba(6, 182, 212, 0.4);
}
.badge-success {
    background: rgba(16, 185, 129, 0.2);
    color: #34d399;
}
.badge-warning {
    background: rgba(245, 158, 11, 0.2);
    color: #fbbf24;
}
.badge-danger {
    background: rgba(239, 68, 68, 0.2);
    color: #f87171;
}

/* Progress bar inside tables */
.progress-bar-container {
    width: 120px;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    overflow: hidden;
}
.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: var(--radius-full);
    transition: width 0.3s ease;
}

/* Mediathek Grid */
.media-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 20px;
}

.media-card {
    background: rgba(17, 24, 39, 0.7);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all 0.25s ease;
    cursor: pointer;
    position: relative;
    display: flex;
    flex-direction: column;
}

.media-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary-light);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.5), 0 0 15px var(--primary-glow);
}

.media-thumb-wrapper {
    position: relative;
    width: 100%;
    padding-top: 56.25%; /* 16:9 Aspect Ratio */
    background: #000000;
    overflow: hidden;
}

.media-thumb {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.media-card:hover .media-thumb {
    transform: scale(1.05);
}

.media-play-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(99, 102, 241, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    opacity: 0;
    transition: opacity 0.2s, transform 0.2s;
    box-shadow: 0 0 16px var(--primary-glow);
}

.media-card:hover .media-play-overlay {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1.05);
}

.media-info {
    padding: 14px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.media-title {
    font-size: 14px;
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 6px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.media-uploader {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.media-meta {
    margin-top: auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 11px;
    color: var(--text-muted);
}

/* Persistent Bottom Audio Player */
#persistent-player {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--player-height);
    background: rgba(11, 15, 25, 0.95);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-top: 1px solid var(--border-color);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    gap: 20px;
    box-shadow: 0 -8px 24px rgba(0, 0, 0, 0.5);
    transition: transform 0.3s ease;
}

#persistent-player.hidden {
    transform: translateY(100%);
}

@media (max-width: 768px) {
    #persistent-player {
        bottom: var(--mobile-nav-height);
        padding: 0 14px;
        gap: 12px;
    }
}

.player-track-info {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 200px;
    max-width: 320px;
}

.player-thumb {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-sm);
    object-fit: cover;
    flex-shrink: 0;
}

.player-track-text {
    min-width: 0;
}

.player-title {
    font-size: 13px;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.player-artist {
    font-size: 11px;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.player-controls-center {
    flex: 1;
    max-width: 600px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.player-buttons {
    display: flex;
    align-items: center;
    gap: 16px;
}

.player-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s, transform 0.1s;
}

.player-btn:hover {
    color: #ffffff;
}

.player-btn-main {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary);
    color: #ffffff;
    box-shadow: 0 0 12px var(--primary-glow);
}
.player-btn-main:hover {
    transform: scale(1.06);
    background: var(--primary-light);
}

.player-seek-wrapper {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 11px;
    color: var(--text-muted);
}

.player-seekbar {
    flex: 1;
    -webkit-appearance: none;
    height: 4px;
    border-radius: 2px;
    background: rgba(255, 255, 255, 0.15);
    outline: none;
    cursor: pointer;
}
.player-seekbar::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--primary-light);
    box-shadow: 0 0 8px var(--primary-glow);
    cursor: pointer;
}

.player-extra-controls {
    display: flex;
    align-items: center;
    gap: 14px;
    min-width: 160px;
    justify-content: flex-end;
}

@media (max-width: 768px) {
    .player-extra-controls {
        display: none;
    }
}

/* Mobile Bottom Navigation Bar */
.mobile-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--mobile-nav-height);
    background: rgba(11, 15, 25, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid var(--border-color);
    z-index: 1000;
    justify-content: space-around;
    align-items: center;
}

@media (max-width: 768px) {
    .mobile-nav {
        display: flex;
    }
}

.mobile-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    color: var(--text-muted);
    font-size: 10px;
    font-weight: 600;
    background: transparent;
    border: none;
    cursor: pointer;
    transition: color 0.2s;
}

.mobile-nav-item.active {
    color: var(--primary-light);
}

.mobile-nav-icon {
    font-size: 20px;
}

/* Video Modal */
.video-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(12px);
    z-index: 99999;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.video-modal.active {
    display: flex;
}

.video-modal-content {
    background: #000000;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    width: 100%;
    max-width: 960px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8);
    position: relative;
}

.video-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 18px;
    background: rgba(17, 24, 39, 0.9);
    border-bottom: 1px solid var(--border-color);
}

.video-modal-title {
    font-size: 14px;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 80%;
}

.video-container {
    position: relative;
    width: 100%;
    padding-top: 56.25%; /* 16:9 */
    background: #000000;
}

.video-container video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* Modals & Dropzone */
.dropzone {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: 36px 20px;
    text-align: center;
    background: rgba(17, 24, 39, 0.4);
    cursor: pointer;
    transition: all 0.2s;
}

.dropzone:hover, .dropzone.dragover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.08);
}

/* ==========================================================================
   Login Screen & Form Elements
   ========================================================================== */
.login-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(75vh - var(--header-height));
    padding: 30px 16px;
}

.login-card {
    width: 100%;
    max-width: 420px;
    background: rgba(17, 24, 39, 0.85);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.75), 0 0 30px var(--primary-glow);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    animation: loginFadeIn 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes loginFadeIn {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(12px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.form-group {
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    text-align: left;
}

.form-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.3px;
}

.form-control {
    width: 100%;
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 12px 14px;
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    transition: all 0.2s ease;
    outline: none;
}

.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
    background: rgba(15, 23, 42, 0.95);
}

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