/**
 * WebTV Station - Professional Design System
 * Modern, clean, and sophisticated interface
 */

:root {
    color-scheme: dark;
    
    /* Professional Color Palette */
    --bg-primary: #0a0e17;
    --bg-secondary: #0f1419;
    --bg-tertiary: #151b26;
    --bg-elevated: #1a2332;
    
    /* Accent Colors - Professional Blue/Purple */
    --accent-primary: #6366f1;
    --accent-secondary: #8b5cf6;
    --accent-hover: #7c3aed;
    --accent-light: rgba(99, 102, 241, 0.1);
    --accent-glow: rgba(99, 102, 241, 0.3);
    
    /* Status Colors */
    --status-live: #ef4444;
    --status-live-glow: rgba(239, 68, 68, 0.3);
    --status-success: #10b981;
    --status-warning: #f59e0b;
    --status-info: #3b82f6;
    
    /* Text Colors */
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-tertiary: #94a3b8;
    --text-muted: #64748b;
    
    /* Border & Divider */
    --border-subtle: rgba(148, 163, 184, 0.1);
    --border-medium: rgba(148, 163, 184, 0.2);
    --border-strong: rgba(148, 163, 184, 0.3);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 20px var(--accent-glow);
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Spacing Scale */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --font-display: 'Plus Jakarta Sans', 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* Background Pattern */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 10%, rgba(99, 102, 241, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.06) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

/* Container */
.surface {
    position: relative;
    z-index: 1;
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-6) var(--space-4);
}

@media (min-width: 768px) {
    .surface {
        padding: var(--space-8) var(--space-6);
    }
}

@media (min-width: 1024px) {
    .surface {
        padding: var(--space-12) var(--space-8);
    }
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
}

h2 {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
}

h3 {
    font-size: clamp(1.25rem, 3vw, 1.875rem);
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

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

/* Header / Masthead */
.masthead {
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    margin-bottom: var(--space-8);
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(20px);
    position: relative;
    overflow: hidden;
}

.masthead::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-primary), transparent);
    opacity: 0.5;
}

.masthead__row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-6);
    flex-wrap: wrap;
}

/* Brand */
.brand {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    font-weight: 700;
    font-size: 1.25rem;
    transition: transform var(--transition-fast);
}

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

.brand__icon {
    width: 48px;
    height: 48px;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-radius: var(--radius-md);
    font-size: 1.5rem;
    box-shadow: var(--shadow-glow);
    position: relative;
}

.brand__icon::after {
    content: '';
    position: absolute;
    inset: -2px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-radius: var(--radius-md);
    opacity: 0.3;
    filter: blur(8px);
    z-index: -1;
}

.brand__text {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.brand__text span {
    font-family: var(--font-display);
    letter-spacing: -0.02em;
}

.brand__text small {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Navigation Actions */
.masthead__row-actions {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    flex-wrap: wrap;
}

/* Navigation Tabs */
.nav-tabs {
    display: inline-flex;
    gap: var(--space-2);
    padding: var(--space-1);
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-full);
}

.nav-tab {
    padding: var(--space-3) var(--space-6);
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-tertiary);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    cursor: pointer;
    border: 1px solid transparent;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-1);
    min-width: 120px;
}

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

.nav-tab--primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    box-shadow: var(--shadow-glow);
    border-color: transparent;
}

.nav-tab--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px var(--accent-glow);
}

.nav-tab__label {
    font-weight: 600;
}

.nav-tab__hint {
    font-size: 0.7rem;
    opacity: 0.8;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Pill Link / Button */
.pill-link {
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.875rem;
    border: 1px solid var(--border-medium);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
}

.pill-link:hover {
    background: var(--bg-elevated);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.pill-link--glow {
    border-color: var(--accent-primary);
    box-shadow: 0 0 15px rgba(99, 102, 241, 0.2);
}

.pill-link__label {
    font-weight: 600;
}

.pill-link__hint {
    font-size: 0.7rem;
    color: var(--text-tertiary);
}

/* Main Content Stack */
.stack {
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
}

/* Module / Section */
.module {
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(20px);
    position: relative;
}

.module__head {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--space-6);
    margin-bottom: var(--space-6);
    flex-wrap: wrap;
}

.module__sub {
    color: var(--text-tertiary);
    font-size: 0.875rem;
    margin-top: var(--space-2);
}

/* Eyebrow Text */
.eyebrow {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-primary);
    margin-bottom: var(--space-2);
}

/* Live Status Chip */
.live-status-chip {
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-5);
    background: var(--bg-secondary);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.875rem;
    box-shadow: var(--shadow-md);
}

.live-status-chip.is-live {
    background: rgba(239, 68, 68, 0.1);
    border-color: var(--status-live);
    box-shadow: 0 0 20px var(--status-live-glow);
}

.status-indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent-primary);
    box-shadow: 0 0 10px var(--accent-glow);
    animation: pulse-status 2s ease-in-out infinite;
}

.is-live .status-indicator {
    background: var(--status-live);
    box-shadow: 0 0 15px var(--status-live-glow);
}

@keyframes pulse-status {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.7;
        transform: scale(1.2);
    }
}

/* Video Player */
.live-screen,
#player,
#yt-live-player {
    width: 100%;
    min-height: 400px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-xl);
    position: relative;
}

@media (min-width: 768px) {
    .live-screen,
    #player,
    #yt-live-player {
        min-height: 500px;
    }
}

@media (min-width: 1024px) {
    .live-screen,
    #player,
    #yt-live-player {
        min-height: 600px;
    }
}

/* Full-width player when live */
.module--live {
    padding: 0;
    background: transparent;
    border: none;
    box-shadow: none;
}

.module--live .live-screen,
.module--live #player,
.module--live #yt-live-player {
    border-radius: 0;
    border-left: none;
    border-right: none;
    min-height: 70vh;
    box-shadow: var(--shadow-xl);
}

.module--live .module__head {
    padding: var(--space-6) var(--space-8);
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border-subtle);
}

.player-hint {
    margin-top: var(--space-4);
    font-size: 0.875rem;
    color: var(--text-tertiary);
    text-align: center;
}

/* Live Chat */
.live-chat {
    margin-top: var(--space-6);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-subtle);
    background: var(--bg-secondary);
    min-height: 400px;
}

.live-chat iframe {
    width: 100%;
    min-height: 400px;
    border: none;
}

.chat-placeholder {
    padding: var(--space-12);
    text-align: center;
    color: var(--text-tertiary);
}

/* Playlist Grid */
.playlist-grid {
    list-style: none;
    display: grid;
    gap: var(--space-6);
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

@media (min-width: 640px) {
    .playlist-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    }
}

/* Playlist Card */
.playlist-card {
    width: 100%;
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
}

.playlist-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--accent-primary);
}

.playlist-card--active {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px var(--accent-glow), var(--shadow-xl);
}

.playlist-card img {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

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

.playlist-card__body {
    padding: var(--space-5);
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    flex: 1;
}

.playlist-card__title {
    font-weight: 600;
    font-size: 0.95rem;
    line-height: 1.4;
    color: var(--text-primary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.playlist-card__meta {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.playlist-actions {
    margin-top: var(--space-6);
    display: flex;
    justify-content: center;
}

/* Buttons */
.primary-btn,
.secondary-btn {
    padding: var(--space-4) var(--space-8);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.9375rem;
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
}

.primary-btn {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    box-shadow: var(--shadow-glow);
}

.primary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px var(--accent-glow);
}

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

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

.secondary-btn:hover {
    background: var(--bg-elevated);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

/* CTA Module */
.module--cta {
    background: linear-gradient(135deg, var(--bg-elevated), var(--bg-tertiary));
    border: 1px solid var(--border-medium);
    display: grid;
    gap: var(--space-8);
    align-items: center;
}

@media (min-width: 768px) {
    .module--cta {
        grid-template-columns: 1fr 1fr;
    }
}

.cta-copy h2 {
    margin-bottom: var(--space-4);
}

.cta-copy p {
    color: var(--text-secondary);
}

.cta-form {
    display: flex;
    gap: var(--space-3);
    flex-wrap: wrap;
}

.cta-form input {
    flex: 1;
    min-width: 240px;
    padding: var(--space-4) var(--space-5);
    border-radius: var(--radius-full);
    border: 1px solid var(--border-medium);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.9375rem;
    transition: all var(--transition-base);
}

.cta-form input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

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

/* Footer */
.site-footer {
    margin-top: var(--space-16);
    padding-top: var(--space-8);
    border-top: 1px solid var(--border-subtle);
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-6);
    justify-content: space-between;
    align-items: center;
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

.footer-eyebrow {
    font-weight: 700;
    color: var(--accent-primary);
}

.footer-links {
    list-style: none;
    display: flex;
    gap: var(--space-6);
}

.footer-links a {
    color: var(--text-tertiary);
    transition: color var(--transition-fast);
}

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

/* Utility Classes */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Loading States */
@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

.loading {
    background: linear-gradient(
        90deg,
        var(--bg-secondary) 0%,
        var(--bg-tertiary) 50%,
        var(--bg-secondary) 100%
    );
    background-size: 1000px 100%;
    animation: shimmer 2s infinite;
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .masthead__row {
        flex-direction: column;
        align-items: stretch;
    }
    
    .masthead__row-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .nav-tabs {
        width: 100%;
        flex-direction: column;
    }
    
    .nav-tab {
        width: 100%;
    }
    
    .pill-link {
        width: 100%;
        justify-content: center;
    }
}

/* Noscript Warning */
.noscript-warning {
    margin: var(--space-6);
    padding: var(--space-6);
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--status-live);
    border-radius: var(--radius-lg);
    color: var(--status-live);
    text-align: center;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-elevated);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-primary);
}

/* Focus Styles */
*:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

button:focus-visible,
a:focus-visible,
input:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}