/* ============================================
   SNS Dance Group — Dark/Moody Theme
   ============================================ */

:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --bg-card: #161616;
    --bg-card-hover: #1c1c1c;
    --text-primary: #f0f0f0;
    --text-secondary: #888888;
    --text-muted: #555555;
    --accent-sweet: #ff6b9d;
    --accent-spicy: #ff4d4d;
    --accent-gradient: linear-gradient(135deg, var(--accent-sweet), var(--accent-spicy));
    --accent-glow: rgba(255, 107, 157, 0.15);
    --border: #222222;
    --font-display: 'Bebas Neue', sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --radius: 12px;
    --radius-sm: 8px;
    --transition: 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ============================================
   Navigation
   ============================================ */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition);
}

.nav.scrolled {
    border-bottom-color: var(--border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.nav-logo {
    font-family: var(--font-display);
    font-size: 2rem;
    letter-spacing: 0.15em;
    text-decoration: none;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 36px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    transition: color var(--transition);
    position: relative;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-primary);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    transition: width var(--transition);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

/* Mobile nav toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
}

/* ============================================
   Hero
   ============================================ */

.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
    background: var(--bg-primary);
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse at 20% 50%, rgba(255, 107, 157, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 50%, rgba(255, 77, 77, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 100%, rgba(255, 107, 157, 0.04) 0%, transparent 40%);
    pointer-events: none;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 60%, var(--bg-primary) 100%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-title {
    font-family: var(--font-display);
    line-height: 0.9;
    margin-bottom: 16px;
}

.hero-title-sweet {
    display: block;
    font-size: clamp(4rem, 12vw, 10rem);
    letter-spacing: 0.1em;
    color: var(--text-primary);
}

.hero-title-amp {
    display: block;
    font-size: clamp(2rem, 5vw, 3.5rem);
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 8px 0;
}

.hero-title-spicy {
    display: block;
    font-size: clamp(4rem, 12vw, 10rem);
    letter-spacing: 0.1em;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-family: var(--font-display);
    font-size: clamp(1rem, 2.5vw, 1.5rem);
    letter-spacing: 0.4em;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.hero-tagline {
    font-size: 1.125rem;
    color: var(--text-secondary);
    font-weight: 300;
    margin-bottom: 40px;
}

.hero-cta {
    display: inline-block;
    padding: 14px 40px;
    background: var(--accent-gradient);
    color: #fff;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.875rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    border-radius: 50px;
    transition: transform var(--transition), box-shadow var(--transition);
}

.hero-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(255, 107, 157, 0.3);
}

.hero-scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    z-index: 2;
}

.hero-scroll-indicator span {
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: var(--accent-gradient);
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: scaleY(0.5); }
    50% { opacity: 1; transform: scaleY(1); }
}

/* ============================================
   Sections
   ============================================ */

.section {
    padding: 120px 0;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4rem);
    letter-spacing: 0.08em;
    margin-bottom: 12px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-desc {
    font-size: 1.125rem;
    color: var(--text-secondary);
    font-weight: 300;
    margin-bottom: 60px;
    max-width: 500px;
}

/* ============================================
   Video Grid
   ============================================ */

.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
    gap: 32px;
}

.video-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.video-card:hover {
    transform: translateY(-4px);
    border-color: rgba(255, 107, 157, 0.3);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

.video-card.featured {
    grid-column: 1 / -1;
    max-width: 800px;
}

/* Thumbnail link cards (for Shorts / non-embeddable) */
.video-thumb-link {
    display: block;
    text-decoration: none;
    color: inherit;
}

.video-thumb {
    position: relative;
    overflow: hidden;
    background: #000;
    aspect-ratio: 16 / 9;
}

.video-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition), opacity var(--transition);
}

.video-thumb-link:hover .video-thumb img {
    transform: scale(1.05);
    opacity: 0.8;
}

.video-play-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    transition: opacity var(--transition);
}

.video-play-overlay svg {
    opacity: 0.85;
    filter: drop-shadow(0 2px 8px rgba(0,0,0,0.5));
    transition: transform var(--transition), opacity var(--transition);
}

.video-thumb-link:hover .video-play-overlay svg {
    transform: scale(1.1);
    opacity: 1;
}

.shorts-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    background: #ff0000;
    color: #fff;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding: 3px 10px;
    border-radius: 4px;
}

.video-wrapper {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 */
    height: 0;
    overflow: hidden;
    background: #000;
}

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

.video-info {
    padding: 20px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.video-info h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    letter-spacing: 0.05em;
}

.video-tag {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent-sweet);
    background: rgba(255, 107, 157, 0.1);
    padding: 4px 12px;
    border-radius: 50px;
}

/* ============================================
   Practice Room
   ============================================ */

.practice {
    background: var(--bg-secondary);
}

.practice-note {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.125rem;
}

/* Practice Sets */
.practice-set {
    margin-bottom: 60px;
}

.practice-set-title {
    font-family: var(--font-display);
    font-size: 1.8rem;
    letter-spacing: 0.06em;
    color: var(--text-primary);
    margin-bottom: 24px;
    padding-left: 16px;
    border-left: 3px solid var(--accent-sweet);
}

.practice-tag {
    background: rgba(255, 165, 0, 0.12) !important;
    color: #ffa500 !important;
}

/* ============================================
   Gallery
   ============================================ */

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
}

.gallery-grid img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    transition: transform var(--transition), opacity var(--transition);
    cursor: pointer;
}

.gallery-grid img:hover {
    transform: scale(1.02);
    opacity: 0.9;
}

.gallery-placeholder {
    grid-column: 1 / -1;
    background: var(--bg-card);
    border: 1px dashed var(--border);
    border-radius: var(--radius);
    padding: 80px 40px;
    text-align: center;
    color: var(--text-muted);
    font-size: 1.25rem;
}

/* ============================================
   About
   ============================================ */

.about {
    background: var(--bg-secondary);
}

.about-content {
    max-width: 800px;
}

.about-text {
    margin-bottom: 48px;
}

.about-text p {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.about-text strong {
    color: var(--text-primary);
    font-weight: 600;
}

.about-stats {
    display: flex;
    gap: 60px;
}

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

.stat-number {
    font-family: var(--font-display);
    font-size: 3rem;
    letter-spacing: 0.05em;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-top: 8px;
}

/* ============================================
   Footer
   ============================================ */

.footer {
    padding: 60px 0;
    border-top: 1px solid var(--border);
    text-align: center;
}

.footer-logo {
    font-family: var(--font-display);
    font-size: 2rem;
    letter-spacing: 0.15em;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-text {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-top: 8px;
}

.footer-copy {
    color: var(--text-muted);
    font-size: 0.75rem;
    margin-top: 24px;
}

/* ============================================
   Lightbox
   ============================================ */

.lightbox {
    position: fixed;
    inset: 0;
    z-index: 2000;
    background: rgba(0, 0, 0, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
    cursor: pointer;
}

.lightbox.active {
    opacity: 1;
    visibility: visible;
}

.lightbox img {
    max-width: 90vw;
    max-height: 90vh;
    object-fit: contain;
    border-radius: var(--radius-sm);
}

/* ============================================
   Animations
   ============================================ */

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   Mobile
   ============================================ */

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

    .nav-links {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(10, 10, 10, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        align-items: center;
        padding: 40px 0;
        gap: 24px;
        border-bottom: 1px solid var(--border);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: transform 0.4s ease, opacity 0.3s ease, visibility 0.3s;
    }

    .nav-links.open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-links a {
        font-size: 1rem;
    }

    .section {
        padding: 80px 0;
    }

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

    .video-card.featured {
        max-width: 100%;
    }

    .about-stats {
        gap: 40px;
    }

    .stat-number {
        font-size: 2.5rem;
    }

    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }
}

@media (max-width: 480px) {
    .hero-tagline {
        font-size: 1rem;
    }

    .about-stats {
        flex-wrap: wrap;
        gap: 32px;
    }

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