/* ============================================
   KRIS CHO PORTFOLIO — DESIGN SYSTEM
   Cinematic, film-grain, editorial aesthetic
   ============================================ */
:root {
    --bg: #111118;
    --bg-elevated: #16161f;
    --bg-card: #1c1c28;
    --text: #e8e8ee;
    --text-muted: #7a7a8e;
    --accent: #5eafc5;
    --accent-dim: rgba(94, 175, 197, 0.12);
    --accent-glow: rgba(94, 175, 197, 0.25);
    --gold: #d7b16b;
    --gold-dim: rgba(215, 177, 107, 0.14);
    --gold-glow: rgba(215, 177, 107, 0.28);
    --red: #c0392b;
    --border: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(255, 255, 255, 0.12);
    --font-heading: 'Playfair Display', Georgia, serif;
    --font-body: 'Instrument Sans', -apple-system, sans-serif;
    --font-mono: 'Space Mono', monospace;
    --radius: 6px;
    --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html { scroll-behavior: smooth; }

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

::selection { background: var(--accent); color: var(--bg); }

/* Noise texture overlay */
.noise-overlay {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 9998;
    opacity: 0.035;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 256px 256px;
}

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    padding: 1.2rem 2.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    z-index: 1000;
    background: rgba(12, 12, 14, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

.nav-logo {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1.3rem;
    color: var(--text);
    text-decoration: none;
    letter-spacing: -0.02em;
}

.nav-logo-dot { color: var(--accent); }

.nav-links { display: flex; gap: 0.3rem; }

.nav-link {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-muted);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 100px;
    transition: color 0.3s, background 0.3s;
    position: relative;
}

.nav-link::before {
    content: attr(data-index);
    font-size: 0.55rem;
    opacity: 0;
    position: absolute;
    top: -2px;
    right: 6px;
    color: var(--accent);
    transition: opacity 0.3s;
}

.nav-link:hover { color: var(--text); background: rgba(255,255,255,0.04); }
.nav-link:hover::before { opacity: 1; }

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    padding: 6px;
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 1.5px;
    background: var(--text);
    transition: transform 0.3s var(--ease), opacity 0.2s;
}

.nav-toggle.active span:first-child { transform: rotate(45deg) translate(2px, 4px); }
.nav-toggle.active span:last-child { transform: rotate(-45deg) translate(2px, -4px); }

.mobile-nav {
    position: fixed;
    inset: 0;
    background: rgba(12,12,14,0.96);
    backdrop-filter: blur(30px);
    z-index: 999;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s;
}

.mobile-nav.active { opacity: 1; pointer-events: all; }

.mobile-nav-link {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.3s;
}

.mobile-nav-link:hover { color: var(--accent); }

/* ============================================
   SCROLL LINE
   ============================================ */
.scroll-line {
    position: fixed;
    top: 0; left: 0;
    height: 2px;
    width: 0%;
    background: var(--accent);
    z-index: 1001;
    box-shadow: 0 0 8px var(--accent-glow);
}

/* ============================================
   SECTION TAG
   ============================================ */
.section-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 3rem;
    padding-left: 2.5rem;
}

/* ============================================
   HERO
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 8rem 2.5rem 4rem;
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
}

.hero-gradient {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 60% 50% at 70% 40%, rgba(94,175,197,0.04) 0%, transparent 60%),
        radial-gradient(ellipse 40% 60% at 20% 80%, rgba(94,175,197,0.03) 0%, transparent 60%);
}

.hero-content {
    position: relative;
    max-width: 560px;
    z-index: 2;
}

.hero-visual {
    position: absolute;
    top: 0;
    right: -5%;
    width: 65%;
    height: 100%;
    z-index: 1;
    overflow: hidden;
}

.hero-visual picture {
    display: block;
    width: 100%;
    height: 100%;
}

.hero-visual img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: 92% center;
    filter: brightness(0.55) saturate(0.82) contrast(1.08);
    transform: scale(1.08);
    transform-origin: right center;
}

.hero-visual::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to right, var(--bg) 0%, rgba(17,17,24,0.7) 25%, transparent 55%);
    z-index: 1;
}

.hero-visual::after {
    content: '';
    position: absolute;
    inset: 0;
    background:
        linear-gradient(to top, var(--bg) 0%, transparent 25%),
        linear-gradient(to bottom, var(--bg) 0%, transparent 15%);
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: 2rem;
    padding: 0.5rem 1rem 0.5rem 0.8rem;
    background: linear-gradient(180deg, rgba(215,177,107,0.15), rgba(215,177,107,0.08));
    border: 1px solid rgba(215,177,107,0.28);
    border-radius: 100px;
    box-shadow: 0 0 24px rgba(215,177,107,0.08);
}

.hero-badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--gold);
    box-shadow: 0 0 12px rgba(215,177,107,0.45);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(0.8); }
}

.hero-name-line {
    display: block;
    font-family: var(--font-heading);
    font-size: clamp(5rem, 14vw, 12rem);
    font-weight: 700;
    line-height: 0.95;
    letter-spacing: -0.03em;
    overflow: hidden;
}

.hero-name-line.outline {
    -webkit-text-stroke: 2px var(--text);
    color: transparent;
    padding-left: 0.15em;
}

.hero-tagline {
    margin-top: 2rem;
    font-family: var(--font-heading);
    font-size: clamp(1rem, 2vw, 1.3rem);
    color: var(--text-muted);
    font-style: italic;
}

.hero-awards {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    margin-top: 2rem;
}

.award-pill {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 0.4rem 0.9rem;
    border: 1px solid var(--border);
    border-radius: 100px;
    color: var(--text-muted);
    transition: border-color 0.3s, color 0.3s;
}

.award-pill:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.hero-scroll {
    position: absolute;
    bottom: 3rem;
    right: 2.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
}

.hero-scroll-line {
    width: 1px;
    height: 50px;
    background: linear-gradient(to bottom, var(--accent), transparent);
    animation: scrollDown 2s ease-in-out infinite;
}

@keyframes scrollDown {
    0% { transform: scaleY(0); transform-origin: top; opacity: 1; }
    50% { transform: scaleY(1); transform-origin: top; opacity: 1; }
    51% { transform-origin: bottom; }
    100% { transform: scaleY(0); transform-origin: bottom; opacity: 1; }
}

/* ============================================
   LIGHTBOX VIDEO PLAYER
   ============================================ */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(0, 0, 0, 0.92);
    backdrop-filter: blur(20px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.35s;
}

.lightbox.active {
    opacity: 1;
    pointer-events: all;
}

.lightbox-close {
    position: absolute;
    top: 1.5rem;
    right: 2rem;
    background: none;
    border: 1px solid rgba(255,255,255,0.15);
    color: var(--text);
    font-size: 1.2rem;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: border-color 0.3s, background 0.3s;
}

.lightbox-close:hover {
    border-color: var(--gold);
    background: rgba(255,255,255,0.05);
}

.lightbox-content {
    width: min(92vw, 1180px);
}

.lightbox-player {
    position: relative;
    aspect-ratio: 16/9;
    width: 100%;
    border-radius: var(--radius);
    overflow: hidden;
    background: #000;
    box-shadow: 0 18px 60px rgba(0,0,0,0.35);
}

.lightbox-player iframe {
    width: 100%;
    height: 100%;
    border: none;
}







.italic {
    font-style: italic;
    color: var(--accent);
}

/* ============================================
   PLAY BUTTON OVERLAY
   ============================================ */
.work-card-play {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.55);
    border: 2px solid rgba(255,255,255,0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    z-index: 2;
    opacity: 0;
    transition: opacity 0.3s, transform 0.3s var(--ease), background 0.3s;
    padding-left: 3px;
}

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

.work-card:hover .work-card-play:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--bg);
}

/* ============================================
   ABOUT
   ============================================ */
.about {
    padding: 6rem 2.5rem;
    border-top: 1px solid var(--border);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    max-width: 1100px;
}

.about-headline {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 3.5vw, 3rem);
    font-weight: 700;
    line-height: 1.25;
    position: sticky;
    top: 6rem;
}

.highlight { color: var(--accent); }

.cursor-blink {
    animation: blink 1s step-end infinite;
}

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

.about-body p {
    font-size: 0.95rem;
    line-height: 1.85;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.about-stats {
    display: flex;
    gap: 3rem;
    margin-top: 2.5rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    align-items: flex-start;
}

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

.stat-row {
    display: flex;
    align-items: baseline;
    min-height: 3.2rem;
}

.stat-num {
    display: block;
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent);
}

.stat-suffix {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent);
}

.stat-label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-top: 0.3rem;
}

/* ============================================
   COLLABORATED WITH (LOGOS)
   ============================================ */
.clients {
    padding: 4rem 2.5rem;
    border-top: 1px solid var(--border);
}

.clients-inner {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.clients-label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
}

.clients-grid {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: clamp(1rem, 2vw, 1.4rem);
    max-width: min(1200px, 100%);
    margin: 0 auto;
}

.clients-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: clamp(1rem, 2vw, 1.6rem) clamp(1.15rem, 2.4vw, 2.25rem);
    width: 100%;
}

.client-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    opacity: 0.52;
    transition: opacity 0.3s, transform 0.3s;
    min-height: clamp(56px, 6vw, 76px);
    width: clamp(138px, 14vw, 178px);
    flex: 0 1 clamp(138px, 14vw, 178px);
    padding: 0.35rem 0.45rem;
}

.client-logo:hover {
    opacity: 0.92;
    transform: translateY(-1px);
}

.client-logo img {
    max-height: clamp(34px, 3.4vw, 52px);
    max-width: min(100%, 185px);
    width: auto;
    object-fit: contain;
    filter: brightness(0) invert(1);
}

.client-logo--netease img {
    max-height: clamp(40px, 4vw, 60px);
    max-width: min(100%, 220px);
}


.client-logo span {
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text);
    letter-spacing: 0.04em;
    white-space: nowrap;
}

/* ============================================
   WORK
   ============================================ */
.work {
    padding: 6rem 2.5rem;
    border-top: 1px solid var(--border);
}

.work-category {
    max-width: 1280px;
    margin: 0 auto 2.5rem;
}

.work-cat-title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 4vw, 3.5rem);
    font-weight: 700;
    line-height: 1.15;
}

.work-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: stretch;
    gap: clamp(1rem, 2vw, 1.5rem);
    max-width: min(1280px, 100%);
    margin: 0 auto 5rem;
}

.work-card {
    flex: 1 1 clamp(300px, 30vw, 390px);
    max-width: clamp(320px, 31vw, 410px);
    min-width: min(100%, 300px);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: border-color 0.4s, transform 0.4s var(--ease);
    cursor: pointer;
}

.work-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-3px);
}

.work-card.wide {
    grid-column: span 2;
}

.work-card-visual {
    aspect-ratio: 16/9;
    background: var(--bg-elevated);
    position: relative;
    overflow: hidden;
}

.work-card-visual img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s var(--ease), filter 0.5s;
    filter: brightness(0.8);
}

.work-card:hover .work-card-visual img {
    transform: scale(1.04);
    filter: brightness(1);
}

.work-card-visual::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, var(--bg-card) 0%, transparent 50%);
    pointer-events: none;
}

.work-card-tag {
    position: absolute;
    top: 0.8rem;
    left: 0.8rem;
    font-family: var(--font-mono);
    font-size: 0.55rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 0.3rem 0.6rem;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(8px);
    border-radius: 100px;
    color: var(--text-muted);
    z-index: 1;
}

.work-card-info {
    padding: 1.2rem;
}

.work-card-info h4 {
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.3rem;
}

.work-card-info p {
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.4;
}

.work-card-year {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.6rem;
    color: var(--accent);
    letter-spacing: 0.1em;
    margin-top: 0.8rem;
    padding: 0.2rem 0.5rem;
    border: 1px solid var(--accent-dim);
    border-radius: 3px;
}

/* ============================================
   MARQUEE
   ============================================ */
.marquee-wrap {
    padding: 2rem 0;
    overflow: hidden;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.marquee-track {
    display: inline-flex;
    align-items: center;
    gap: 2rem;
    white-space: nowrap;
    animation: scroll 25s linear infinite;
    font-family: var(--font-heading);
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    font-weight: 700;
    opacity: 0.08;
}

.marquee-track .sep {
    color: var(--accent);
    font-size: 0.8rem;
    opacity: 0.5;
}

@keyframes scroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* ============================================
   CONTACT
   ============================================ */
.contact {
    padding: 8rem 2.5rem;
    text-align: center;
    border-top: 1px solid var(--border);
}

.contact .section-tag { padding-left: 0; }

.contact-title {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 3rem;
}

.contact-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.contact-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    text-decoration: none;
    padding: 0.9rem 2rem;
    border-radius: 100px;
    transition: all 0.3s var(--ease);
}

.contact-btn.primary {
    background: var(--accent);
    color: var(--bg);
    font-weight: 600;
}

.contact-btn.primary:hover {
    background: #4d9ab0;
    transform: translateY(-2px);
    box-shadow: 0 4px 20px var(--accent-glow);
}

.contact-btn.secondary {
    border: 1px solid var(--border);
    color: var(--text-muted);
}

.contact-btn.secondary:hover {
    border-color: var(--text-muted);
    color: var(--text);
    transform: translateY(-2px);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    padding: 2rem 2.5rem;
    border-top: 1px solid var(--border);
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-brand {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1rem;
}

.footer-copy {
    font-size: 0.7rem;
    color: var(--text-muted);
    letter-spacing: 0.05em;
}


@media (max-width: 1100px) {
    .work-grid {
        max-width: 100%;
    }

    .work-card {
        flex: 1 1 calc(50% - 0.75rem);
        max-width: calc(50% - 0.75rem);
    }
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    .nav { padding: 1rem 1.5rem; }
    .nav-links { display: none; }
    .nav-toggle { display: flex; }

    .hero { padding: 7rem 1.5rem 3rem; }
    .hero-scroll { display: none; }
    .hero-visual { display: none; }

    .section-tag { padding-left: 1.5rem; }

    .about, .clients, .work, .contact { padding: 4rem 1.5rem; }
    .clients-grid {
        gap: 1rem;
        max-width: 100%;
    }

    .clients-row {
        gap: 0.9rem 1rem;
    }

    .client-logo {
        flex-basis: calc(50% - 1rem);
        width: min(165px, calc(50% - 1rem));
    }

    .about-grid { grid-template-columns: 1fr; gap: 2rem; }
    .about-headline { position: static; }
    .about-stats { gap: 1.5rem; }

    .work-card {
        max-width: 100%;
        min-width: 100%;
        flex-basis: 100%;
    }
    .work-card.wide { grid-column: span 1; }

    .footer-inner { flex-direction: column; gap: 0.5rem; text-align: center; }
}


@media (max-width: 640px) {
    .lightbox-close {
        top: 1rem;
        right: 1rem;
    }

    .lightbox-content {
        width: min(94vw, 1100px);
    }