/* ==========================================================================
   Horizon Discover Web App — Stylesheet (Horizon Dark / Maroon Aesthetic)
   ========================================================================== */

:root {
    --bg-main: #121212;
    --bg-surface: #1E1E1E;
    --bg-surface-secondary: #242424;
    --bg-surface-elevated: #2A2A2A;
    --border-color: #303030;
    --border-highlight: #444444;
    
    --primary-maroon: #5B0E2D;
    --primary-hover: #731339;
    --primary-glow: rgba(91, 14, 45, 0.45);
    
    --text-primary: #FFFFFF;
    --text-secondary: #BDBDBD;
    --text-muted: #858585;
    
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-full: 9999px;
    
    --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 8px 32px var(--primary-glow);
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: var(--font-body);
    background-color: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    position: relative;
    user-select: none;
    -webkit-user-select: none;
}

/* Background Ambient Glow */
.glow-bg {
    position: fixed;
    top: -150px;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 400px;
    background: radial-gradient(circle, var(--primary-glow) 0%, rgba(18, 18, 18, 0) 70%);
    pointer-events: none;
    z-index: 0;
    opacity: 0.6;
}

.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 16px;
}

/* ==========================================================================
   Header / Navbar
   ========================================================================== */
.navbar {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(18, 18, 18, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    padding: 12px 0;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
    cursor: pointer;
}

.brand-logo {
    width: 38px;
    height: 38px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, var(--primary-maroon), #880E4F);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #FFFFFF;
    box-shadow: 0 2px 10px var(--primary-glow);
}

.brand-name {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.brand-accent {
    color: #E2477D;
    font-weight: 500;
}

.search-box {
    flex: 1;
    max-width: 480px;
    position: relative;
    display: flex;
    align-items: center;
}

.search-icon {
    position: absolute;
    left: 14px;
    color: var(--text-muted);
    pointer-events: none;
}

.search-box input {
    width: 100%;
    padding: 10px 14px 10px 42px;
    background: var(--bg-surface-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: var(--font-body);
    outline: none;
    transition: var(--transition);
}

.search-box input:focus {
    border-color: var(--primary-maroon);
    box-shadow: 0 0 0 2px var(--primary-glow);
    background: var(--bg-surface);
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 9px 18px;
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: var(--primary-maroon);
    color: #FFFFFF;
    box-shadow: 0 4px 14px var(--primary-glow);
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

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

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

.btn-outline:hover {
    background: var(--bg-surface-elevated);
    border-color: var(--border-highlight);
    color: var(--text-primary);
}

.btn-glass {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: var(--text-primary);
}

.btn-glass:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.main-content {
    flex: 1;
    padding-top: 24px;
    padding-bottom: 120px;
    position: relative;
    z-index: 1;
}

.hero-section {
    background: linear-gradient(135deg, rgba(91, 14, 45, 0.35) 0%, rgba(30, 30, 30, 0.8) 100%);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    margin-bottom: 28px;
    box-shadow: var(--shadow-card);
    position: relative;
    overflow: hidden;
}

.hero-badge {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(226, 71, 125, 0.15);
    border: 1px solid rgba(226, 71, 125, 0.3);
    color: #FF80AB;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-radius: var(--radius-full);
    margin-bottom: 14px;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.gradient-text {
    background: linear-gradient(90deg, #FFFFFF 0%, #E2477D 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
    max-width: 600px;
    margin-bottom: 24px;
}

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

/* ==========================================================================
   Filter Chips
   ========================================================================== */
.filter-section {
    margin-bottom: 24px;
    overflow-x: auto;
    padding-bottom: 6px;
    scrollbar-width: none;
}

.filter-section::-webkit-scrollbar {
    display: none;
}

.chip-group {
    display: flex;
    gap: 8px;
    min-width: max-content;
}

.chip {
    padding: 8px 16px;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.chip:hover {
    background: var(--bg-surface-elevated);
    color: var(--text-primary);
}

.chip.active {
    background: var(--primary-maroon);
    border-color: var(--primary-maroon);
    color: #FFFFFF;
    box-shadow: 0 2px 10px var(--primary-glow);
}

/* ==========================================================================
   Media Cards Grid
   ========================================================================== */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 700;
}

.section-link {
    font-size: 0.85rem;
    color: #E2477D;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.section-link:hover {
    text-decoration: underline;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 16px;
}

.media-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.media-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-highlight);
    box-shadow: var(--shadow-card);
}

.media-card.playing {
    border-color: var(--primary-maroon);
    box-shadow: 0 0 0 1px var(--primary-maroon), var(--shadow-glow);
}

.card-thumb {
    width: 100%;
    aspect-ratio: 16 / 10;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    background-size: cover;
    background-position: center;
}

/* Visual Gradient Backgrounds for Demo Media */
.thumb-1 { background: linear-gradient(135deg, #4A148C, #1E1E1E); }
.thumb-2 { background: linear-gradient(135deg, #0D47A1, #00B0FF); }
.thumb-3 { background: linear-gradient(135deg, #5B0E2D, #AD1457); }
.thumb-4 { background: linear-gradient(135deg, #880E4F, #311B92); }
.thumb-5 { background: linear-gradient(135deg, #004D40, #00BFA5); }
.thumb-6 { background: linear-gradient(135deg, #FF6F00, #E65100); }

.play-overlay {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #FFFFFF;
    opacity: 0.9;
    transition: var(--transition);
    transform: scale(0.9);
}

.media-card:hover .play-overlay {
    background: var(--primary-maroon);
    transform: scale(1.08);
    opacity: 1;
}

.duration-badge {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(4px);
    color: #FFFFFF;
    font-size: 0.7rem;
    font-weight: 600;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
}

.card-body {
    padding: 12px 14px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.card-title {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.card-subtitle {
    font-size: 0.8rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ==========================================================================
   Sticky Bottom Player Bar
   ========================================================================== */
.player-bar-container {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: rgba(30, 30, 30, 0.95);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-top: 1px solid var(--border-color);
    padding: 12px 16px;
    z-index: 100;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.5);
}

.player-content {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.player-info {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 200px;
    max-width: 300px;
}

.player-cover {
    width: 42px;
    height: 42px;
    border-radius: var(--radius-sm);
    background: var(--bg-surface-elevated);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-maroon);
    flex-shrink: 0;
}

.player-text {
    overflow: hidden;
}

.player-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.player-artist {
    font-size: 0.75rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.player-controls {
    display: flex;
    align-items: center;
    gap: 12px;
}

.ctrl-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6px;
    border-radius: 50%;
    transition: var(--transition);
}

.ctrl-btn:hover {
    color: var(--text-primary);
    background: var(--bg-surface-elevated);
}

.ctrl-play {
    width: 44px;
    height: 44px;
    background: var(--primary-maroon);
    color: #FFFFFF;
    box-shadow: 0 2px 10px var(--primary-glow);
}

.ctrl-play:hover {
    background: var(--primary-hover);
    transform: scale(1.05);
}

.player-progress-area {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 10px;
    max-width: 450px;
}

.time-text {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-variant-numeric: tabular-nums;
    min-width: 32px;
}

.progress-bar-wrap {
    flex: 1;
    height: 4px;
    background: var(--bg-surface-elevated);
    border-radius: var(--radius-full);
    position: relative;
    cursor: pointer;
    overflow: hidden;
}

.progress-bar-fill {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 0%;
    background: var(--primary-maroon);
    border-radius: var(--radius-full);
    transition: width 0.1s linear;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
    border-top: 1px solid var(--border-color);
    padding: 24px 0;
    background: var(--bg-main);
}

.footer-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}

.footer-copy {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.footer-links {
    display: flex;
    gap: 16px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.8rem;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--text-primary);
}

/* Toast Message */
.toast {
    position: fixed;
    bottom: 90px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--bg-surface-elevated);
    border: 1px solid var(--primary-maroon);
    color: #FFFFFF;
    padding: 10px 20px;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 500;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.6);
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
    z-index: 200;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* Responsive Breakpoints */
@media (max-width: 768px) {
    .navbar .search-box {
        display: none;
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .cards-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 12px;
    }
    
    .player-progress-area {
        display: none;
    }
    
    .player-content {
        justify-content: space-between;
    }
}