:root {
  color-scheme: dark;
  --bg: #07101f;
  --surface: #0d192b;
  --surface-strong: #12223a;
  --text: #f4f8ff;
  --muted: #aab9cc;
  --line: rgba(148, 163, 184, 0.2);
  --accent: #39c4ff;
  --accent-strong: #7cddff;
  --accent-soft: rgba(57, 196, 255, 0.12);
  --max-width: 1180px;
  --radius: 22px;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.28);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 88% 8%, rgba(57, 196, 255, 0.1), transparent 30rem),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

a { color: inherit; }
img { display: block; max-width: 100%; }
.container { width: min(calc(100% - 40px), var(--max-width)); margin-inline: auto; }
.skip-link { position: fixed; top: -100px; left: 16px; z-index: 100; padding: 10px 16px; background: var(--accent); color: #03111d; border-radius: 8px; font-weight: 800; }
.skip-link:focus { top: 16px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: rgba(7, 16, 31, 0.84);
  backdrop-filter: blur(18px);
}
.nav { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; font-weight: 850; letter-spacing: 0.04em; }
.brand-mark { display: grid; place-items: center; width: 52px; aspect-ratio: 1; flex: 0 0 auto; }
.brand-mark img { display: block; width: 100%; height: 100%; object-fit: contain; }
.nav-links { display: flex; align-items: center; gap: 6px; margin: 0; padding: 0; list-style: none; }
.nav-links a { display: block; padding: 10px 14px; border-radius: 10px; color: var(--muted); text-decoration: none; font-weight: 650; }
.nav-links a:hover, .nav-links a:focus-visible, .nav-links a[aria-current="page"] { background: var(--accent-soft); color: var(--text); }

main { overflow: hidden; }
.hero { position: relative; min-height: calc(100vh - 76px); display: grid; align-items: center; padding: 92px 0; }
.hero::after { content: ""; position: absolute; right: -15%; top: 12%; width: 42rem; height: 42rem; border: 1px solid rgba(57,196,255,.08); border-radius: 50%; box-shadow: 0 0 0 90px rgba(57,196,255,.025), 0 0 0 180px rgba(57,196,255,.018); pointer-events: none; }
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(280px, .75fr); gap: 72px; align-items: center; }
.eyebrow { margin: 0 0 18px; color: var(--accent); font-size: .82rem; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; }
h1, h2, h3 { margin-top: 0; line-height: 1.08; letter-spacing: -.035em; }
h1 { max-width: 880px; margin-bottom: 26px; font-size: clamp(3rem, 7vw, 6.7rem); }
.page-hero h1 { font-size: clamp(2.8rem, 6vw, 5.7rem); }
.accent { color: var(--accent); }
.lead { max-width: 720px; margin: 0; color: var(--muted); font-size: clamp(1.05rem, 2vw, 1.28rem); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 50px; padding: 0 22px; border: 1px solid transparent; border-radius: 12px; background: var(--accent); color: #03111d; text-decoration: none; font-weight: 800; transition: transform .2s ease, background .2s ease, border-color .2s ease; }
.button:hover { transform: translateY(-2px); background: var(--accent-strong); }
.button.secondary { border-color: var(--line); background: transparent; color: var(--text); }
.button.secondary:hover { border-color: var(--accent); background: var(--accent-soft); }

.status-card { position: relative; padding: 30px; border: 1px solid var(--line); border-radius: var(--radius); background: linear-gradient(145deg, rgba(18,34,58,.95), rgba(9,19,34,.94)); box-shadow: var(--shadow); }
.status-card::before { content: ""; position: absolute; inset: 0; border-radius: inherit; background: linear-gradient(135deg, rgba(57,196,255,.12), transparent 38%); pointer-events: none; }
.status-dot { display: inline-block; width: 9px; height: 9px; margin-right: 8px; border-radius: 50%; background: #61e6a7; box-shadow: 0 0 0 6px rgba(97,230,167,.1); }
.status-card h2 { margin: 28px 0 12px; font-size: 1.7rem; }
.status-card p { margin: 0; color: var(--muted); }
.mini-list { display: grid; gap: 12px; margin: 26px 0 0; padding: 0; list-style: none; }
.mini-list li { display: flex; justify-content: space-between; gap: 20px; padding-top: 12px; border-top: 1px solid var(--line); color: var(--muted); }
.mini-list strong { color: var(--text); }

.portfolio-hero { position: relative; min-height: calc(100svh - 76px); display: grid; align-items: center; padding: 82px 0; background: radial-gradient(circle at 78% 30%, rgba(57,196,255,.1), transparent 26rem); }
.portfolio-hero-inner { display: grid; grid-template-columns: minmax(0, .92fr) minmax(420px, 1.08fr); gap: clamp(42px, 6vw, 88px); align-items: center; }
.portfolio-hero-copy { position: relative; z-index: 2; text-align: left; }
.portfolio-hero-copy h1 { margin-bottom: 18px; font-size: clamp(3.3rem, 6.2vw, 6.4rem); text-wrap: balance; }
.portfolio-role { margin: 0 0 20px; color: var(--text); font-size: clamp(1.3rem, 2.2vw, 2rem); font-weight: 750; letter-spacing: -.02em; }
.portfolio-hero-copy .lead { color: var(--muted); }
.portfolio-secondary { border-color: var(--line) !important; background: transparent !important; }
.portfolio-portrait { position: relative; margin: 0; overflow: hidden; border: 1px solid rgba(57,196,255,.24); border-radius: 30px; background: var(--surface); box-shadow: var(--shadow); }
.portfolio-portrait::after { content: ""; position: absolute; inset: 0 0 66px; border-radius: 30px 30px 0 0; box-shadow: inset 0 -90px 80px -80px rgba(7,16,31,.7); pointer-events: none; }
.portfolio-portrait img { width: 100%; height: clamp(490px, 65vh, 720px); object-fit: cover; object-position: 35% center; }
.portfolio-portrait figcaption { display: flex; min-height: 66px; align-items: center; padding: 0 24px; color: var(--muted); font-size: .88rem; font-weight: 700; }

.section { padding: 104px 0; }
.section.compact { padding-top: 48px; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 28px; margin-bottom: 42px; }
.section-heading h2 { max-width: 700px; margin-bottom: 0; font-size: clamp(2rem, 4vw, 3.7rem); }
.text-link { color: var(--accent); font-weight: 750; text-underline-offset: 5px; }
.grid { display: grid; gap: 22px; }
.cards-3 { grid-template-columns: repeat(3, 1fr); }
.cards-2 { grid-template-columns: repeat(2, 1fr); }
.card { position: relative; padding: 30px; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(13,25,43,.8); }
.card:hover { border-color: rgba(57,196,255,.42); }
.card-number { color: var(--accent); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .84rem; }
.card h3 { margin: 22px 0 12px; font-size: 1.55rem; }
.card p { margin: 0; color: var(--muted); }
.card.project-card-media { display: flex; flex-direction: column; padding: 0; overflow: hidden; }
.project-card-image { display: block; aspect-ratio: 16 / 10; overflow: hidden; background: #fff; }
.project-card-image img { display: block; width: 100%; height: 100%; object-fit: cover; transition: transform .35s ease; }
.project-card-media:hover .project-card-image img { transform: scale(1.025); }
.project-card-body { display: flex; flex: 1; flex-direction: column; padding: 28px 30px 30px; }
.project-card .project-meta { margin-top: 12px; color: var(--text); font-size: .88rem; font-weight: 750; }
.project-card-media h3 a { color: inherit; text-decoration: none; }
.project-card-media h3 a::after { position: absolute; inset: 0; content: ""; }
.project-card-media .tags, .project-card-media .project-footer { position: relative; z-index: 1; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 24px; }
.tag { padding: 6px 10px; border: 1px solid var(--line); border-radius: 999px; color: #c6d4e6; font-size: .78rem; font-weight: 700; }
.project-card { display: flex; min-height: 350px; flex-direction: column; }
.project-card .project-footer { margin-top: auto; padding-top: 28px; }
.project-link { margin-top: 24px; }
.featured-project { border-color: rgba(57,196,255,.38); background: linear-gradient(145deg, rgba(18,34,58,.96), rgba(13,25,43,.82)); }
.project-type { display: flex; align-items: center; justify-content: space-between; gap: 12px; color: var(--accent); font-size: .8rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.project-icon { display: grid; place-items: center; width: 44px; aspect-ratio: 1; border-radius: 13px; background: var(--accent-soft); font-size: 1.2rem; }

.page-hero { padding: 118px 0 70px; }
.page-hero .lead { max-width: 800px; }
.split { display: grid; grid-template-columns: .75fr 1.25fr; gap: 72px; align-items: start; }
.sticky-label { position: sticky; top: 120px; }
.prose { max-width: 760px; }
.prose h2 { margin: 0 0 22px; font-size: clamp(2rem, 4vw, 3.2rem); }
.prose p { margin: 0 0 22px; color: var(--muted); font-size: 1.08rem; }
.principles { margin: 36px 0 0; padding: 0; list-style: none; counter-reset: principles; }
.principles li { position: relative; padding: 22px 0 22px 54px; border-top: 1px solid var(--line); color: var(--muted); }
.principles li::before { counter-increment: principles; content: "0" counter(principles); position: absolute; left: 0; color: var(--accent); font-family: ui-monospace, monospace; font-size: .82rem; }
.principles strong { display: block; margin-bottom: 5px; color: var(--text); }

.cta { padding: 44px; border: 1px solid rgba(57,196,255,.28); border-radius: calc(var(--radius) + 4px); background: linear-gradient(135deg, rgba(57,196,255,.14), rgba(13,25,43,.85) 50%); }
.cta h2 { max-width: 760px; margin-bottom: 18px; font-size: clamp(2rem, 4.5vw, 4rem); }
.cta p { max-width: 650px; margin: 0; color: var(--muted); }
.contact-grid { display: grid; grid-template-columns: 1.25fr .75fr; gap: 28px; }
.contact-card { min-height: 260px; }
.contact-card a:not(.button) { color: var(--accent); font-weight: 750; text-underline-offset: 5px; }
.social-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.social-card { display: flex; min-height: 320px; flex-direction: column; }
.social-mark { display: grid; place-items: center; width: 58px; aspect-ratio: 1; isolation: isolate; border-radius: 17px; color: #fff; forced-color-adjust: none; box-shadow: 0 12px 30px rgba(0,0,0,.22), inset 0 0 0 1px rgba(255,255,255,.12); }
.social-mark svg { width: 31px; height: 31px; fill: #fff; filter: drop-shadow(0 1px 2px rgba(0,0,0,.22)); }
.social-mark-linkedin { background: #0a66c2; }
.social-mark-instagram { background: radial-gradient(circle at 32% 105%, #ffd600 0 18%, #ff7a00 32%, #ff0169 54%, #d300c5 72%, #7638fa 100%); }
.social-mark-github { background: #24292f; box-shadow: 0 12px 30px rgba(0,0,0,.22), inset 0 0 0 1px rgba(255,255,255,.16); }
.social-card .hero-actions { margin-top: auto; padding-top: 26px; }
.social-card .button { width: 100%; }
.opportunity-panel { padding-block: clamp(12px, 2vw, 24px); }
.opportunity-copy { max-width: 850px; }
.opportunity-copy h2 { max-width: 800px; margin-bottom: 20px; font-size: clamp(2.2rem, 4.5vw, 4.2rem); }
.opportunity-copy .lead { max-width: 720px; }
.opportunity-copy .eyebrow + .lead { margin-top: 18px; }

.case-hero { padding: 92px 0 48px; }
.case-hero-grid { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(280px, .8fr); gap: 48px; align-items: end; }
.case-hero h1 { margin-bottom: 24px; font-size: clamp(2.8rem, 6vw, 5.8rem); }
.case-meta { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.meta-item { padding-top: 14px; border-top: 1px solid var(--line); }
.meta-label { display: block; margin-bottom: 5px; color: var(--muted); font-size: .76rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.meta-value { font-weight: 700; }
.case-media { margin-top: 42px; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow); }
.case-media img, .case-media video { display: block; width: 100%; height: auto; max-height: 720px; object-fit: contain; background: #e9edf3; }
.case-media figcaption { padding: 14px 18px; color: var(--muted); font-size: .86rem; }
.case-intro { display: grid; grid-template-columns: .8fr 1.2fr; gap: 56px; align-items: start; }
.case-intro h2 { font-size: clamp(2rem, 4vw, 3.4rem); }
.case-copy p { margin: 0 0 22px; color: var(--muted); font-size: 1.08rem; }
.facts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 40px; }
.fact { padding: 22px 0; border-top: 1px solid var(--line); }
.fact strong { display: block; margin-bottom: 6px; color: var(--text); }
.fact span { color: var(--muted); }
.gallery { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.gallery figure { display: flex; margin: 0; overflow: hidden; flex-direction: column; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.gallery figure:first-child { grid-column: 1 / -1; }
.gallery img { width: 100%; aspect-ratio: 16 / 10; object-fit: contain; background: #e9edf3; }
.gallery figure:first-child img { aspect-ratio: 2 / 1; }
.gallery figcaption { padding: 12px 16px; color: var(--muted); font-size: .84rem; }
.process-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.video-wrap { width: min(100%, 980px); aspect-ratio: 4 / 3; margin-inline: auto; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: #000; box-shadow: var(--shadow); }
.video-wrap video { display: block; width: 100%; height: 100%; background: #000; object-fit: cover; object-position: center; }
.hanoi-card-image img { object-position: center 45%; }
.hanoi-video { width: min(100%, 840px); aspect-ratio: 7 / 5; margin-inline: auto; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: #000; box-shadow: var(--shadow); }
.hanoi-video video { display: block; width: 100%; height: 100%; object-fit: contain; background: #000; }
.hanoi-gallery { grid-template-columns: repeat(2, 1fr); }
.hanoi-gallery figure:first-child { grid-column: 1 / -1; }
.hanoi-gallery img { aspect-ratio: 16 / 9; object-fit: cover; background: #e9edf3; }
.algorithm-layout { display: grid; grid-template-columns: minmax(280px, .7fr) minmax(0, 1.3fr); gap: clamp(28px, 5vw, 68px); align-items: start; }
.algorithm-sheet { margin: 0; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: var(--shadow); }
.algorithm-sheet img { width: 100%; height: auto; }
.algorithm-sheet figcaption { padding: 16px 18px; background: var(--surface); color: var(--muted); font-size: .9rem; }
.algorithm-notes { display: grid; gap: 18px; }
.algorithm-notes .card { min-height: auto; }
.coming-soon { padding: 30px; border: 1px dashed rgba(57,196,255,.38); border-radius: var(--radius); background: var(--accent-soft); color: var(--muted); }
.drawing-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
.drawing-card { display: flex; overflow: hidden; flex-direction: column; padding: 0; }
.drawing-preview { display: block; overflow: hidden; border-bottom: 1px solid var(--line); background: #f3f5f8; }
.drawing-preview img { width: 100%; aspect-ratio: 1.414 / 1; object-fit: contain; transition: transform .25s ease; }
.drawing-preview:hover img { transform: scale(1.015); }
.drawing-content { display: flex; flex: 1; flex-direction: column; padding: 26px; }
.drawing-content h3 { margin: 12px 0 10px; }
.drawing-content p { margin: 0; color: var(--muted); }
.drawing-content .hero-actions { margin-top: auto; padding-top: 24px; }
.drawing-meta { color: var(--accent); font-size: .78rem; font-weight: 800; letter-spacing: .09em; text-transform: uppercase; }

.site-footer { margin-top: 60px; border-top: 1px solid var(--line); }
.footer-inner { min-height: 120px; display: flex; align-items: center; justify-content: space-between; gap: 24px; color: var(--muted); font-size: .92rem; }
.footer-inner a { color: var(--text); text-decoration: none; }
.footer-inner a:hover { color: var(--accent); }

:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { transition: none !important; } }

@media (max-width: 900px) {
  .hero { min-height: auto; }
  .hero-grid, .split, .contact-grid { grid-template-columns: 1fr; }
  .hero-grid, .split { gap: 44px; }
  .cards-3 { grid-template-columns: 1fr 1fr; }
  .case-hero-grid, .case-intro { grid-template-columns: 1fr; }
  .gallery { grid-template-columns: 1fr 1fr; }
  .gallery figure:first-child { grid-column: 1 / -1; }
  .process-grid { grid-template-columns: 1fr; }
  .drawing-grid { grid-template-columns: 1fr 1fr; }
  .sticky-label { position: static; }
  .portfolio-hero { min-height: calc(100svh - 76px); overflow: hidden; padding: 0; background: var(--bg); }
  .portfolio-hero-inner { position: static; display: flex; min-height: calc(100svh - 76px); align-items: flex-end; padding-block: 320px 76px; }
  .portfolio-hero-copy { z-index: 3; width: min(100%, 720px); max-width: 720px; }
  .portfolio-hero-copy .lead { color: #d7e1ee; }
  .portfolio-portrait { position: absolute; inset: 0; z-index: 1; border: 0; border-radius: 0; box-shadow: none; }
  .portfolio-portrait::after { inset: 0; z-index: 2; border-radius: 0; background: linear-gradient(0deg, rgba(4,10,20,.98) 0%, rgba(4,10,20,.84) 34%, rgba(4,10,20,.26) 66%, rgba(4,10,20,.05) 100%); box-shadow: none; }
  .portfolio-portrait img { height: 100%; object-position: 35% center; }
  .portfolio-portrait figcaption { display: none; }
  .portfolio-secondary { border-color: rgba(255,255,255,.42) !important; background: rgba(4,10,20,.22) !important; backdrop-filter: blur(8px); }
}

@media (max-width: 680px) {
  .container { width: min(calc(100% - 28px), var(--max-width)); }
  .nav { min-height: auto; padding: 14px 0; align-items: flex-start; }
  .brand-name { display: none; }
  .nav-links { justify-content: flex-end; flex-wrap: wrap; gap: 2px; }
  .nav-links a { padding: 8px 9px; font-size: .88rem; }
  .hero { padding: 70px 0; }
  .page-hero { padding: 76px 0 42px; }
  .section { padding: 74px 0; }
  .cards-3, .cards-2 { grid-template-columns: 1fr; }
  .section-heading, .footer-inner { align-items: flex-start; flex-direction: column; }
  .card, .status-card { padding: 24px; }
  .cta { padding: 30px 24px; }
  .project-card { min-height: 310px; }
  .case-hero { padding: 68px 0 32px; }
  .case-meta, .facts, .gallery { grid-template-columns: 1fr; }
  .gallery figure:first-child { grid-column: auto; }
  .gallery img, .gallery figure:first-child img { aspect-ratio: auto; }
  .drawing-grid { grid-template-columns: 1fr; }
  .hanoi-gallery { grid-template-columns: 1fr; }
  .hanoi-gallery figure:first-child { grid-column: auto; }
  .algorithm-layout { grid-template-columns: 1fr; }
  .portfolio-hero { min-height: calc(100svh - 68px); }
  .portfolio-hero-inner { min-height: calc(100svh - 68px); padding-block: 300px 58px; }
  .portfolio-portrait img { object-position: 38% center; }
  .portfolio-hero-copy h1 { font-size: clamp(2.7rem, 14vw, 4.4rem); }
  .portfolio-role { font-size: 1.2rem; }
  .social-mark { width: 64px; border-radius: 18px; }
  .social-mark svg { width: 35px; height: 35px; }
}