:root {
  --bg: #ffffff;
  --surface: #f4f7fa;
  --text: #1b2733;
  --muted: #5b6b7a;
  --navy: #0e2841;
  --accent: #2f7486;
  --accent-ink: #ffffff;
  --border: #d9e1e8;
  --radius: 14px;
  --max: 980px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0c1620;
    --surface: #132230;
    --text: #e6edf3;
    --muted: #9fb0bf;
    --navy: #cfe3f2;
    --accent: #5fb4c9;
    --accent-ink: #0c1620;
    --border: #243645;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.65;
  font-size: 17px;
}

a { color: var(--accent); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand { font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--navy); text-decoration: none; font-size: 15px; }
.nav a { margin-left: 22px; color: var(--muted); text-decoration: none; font-size: 15px; }
.nav a:hover { color: var(--accent); }

/* Hero */
.hero { padding: 84px 0 56px; }
.eyebrow { color: var(--accent); font-weight: 600; letter-spacing: .12em; text-transform: uppercase; font-size: 13px; margin: 0 0 14px; }
.hero h1 { font-size: clamp(34px, 6vw, 56px); line-height: 1.1; margin: 0 0 18px; color: var(--navy); letter-spacing: -.02em; }
.hero p.lead { font-size: 19px; color: var(--muted); max-width: 640px; margin: 0 0 28px; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; }
.btn {
  display: inline-block; padding: 11px 20px; border-radius: 999px; font-weight: 600; font-size: 15px;
  text-decoration: none; border: 1.5px solid var(--accent); color: var(--accent);
}
.btn.primary { background: var(--accent); color: var(--accent-ink); }
.btn:hover { filter: brightness(1.08); }

/* Sections */
section { padding: 48px 0; }
section h2 { font-size: 26px; color: var(--navy); margin: 0 0 8px; letter-spacing: -.01em; }
section .sub { color: var(--muted); margin: 0 0 28px; }

/* Project cards */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); gap: 20px; }
.card {
  display: flex; flex-direction: column; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden; text-decoration: none; color: inherit;
  transition: transform .15s ease, border-color .15s ease;
}
.card:hover { transform: translateY(-3px); border-color: var(--accent); }
.card .thumb {
  aspect-ratio: 16 / 9; display: grid; place-items: center; color: var(--muted); font-size: 14px;
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 18%, var(--surface)), var(--surface));
  border-bottom: 1px solid var(--border);
}
.card .thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.card .body { padding: 18px 18px 20px; }
.card h3 { margin: 0 0 4px; font-size: 19px; color: var(--navy); }
.card .meta { color: var(--muted); font-size: 14px; margin: 0 0 10px; }
.card p { margin: 0 0 12px; font-size: 15.5px; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; padding: 0; margin: 0; list-style: none; }
.tags li { font-size: 12.5px; padding: 3px 10px; border-radius: 999px; border: 1px solid var(--border); color: var(--muted); }

/* Skills */
.skills { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; }
.skills div { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 18px; }
.skills h3 { margin: 0 0 6px; font-size: 15px; color: var(--navy); text-transform: uppercase; letter-spacing: .06em; }
.skills p { margin: 0; color: var(--muted); font-size: 15.5px; }

/* Project page */
.project-head { padding: 56px 0 8px; }
.back { font-size: 15px; text-decoration: none; color: var(--muted); }
.project-head h1 { font-size: clamp(30px, 5vw, 44px); color: var(--navy); margin: 14px 0 8px; letter-spacing: -.02em; line-height: 1.15; }
.facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 12px; margin: 24px 0 8px; }
.facts div { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 12px 16px; }
.facts dt { font-size: 12.5px; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin: 0 0 2px; }
.facts dd { margin: 0; font-weight: 600; color: var(--navy); }
.prose h2 { margin-top: 36px; font-size: 22px; }
.prose ul { padding-left: 20px; }
.prose li { margin-bottom: 6px; }
.media {
  margin: 28px 0; border: 1.5px dashed var(--border); border-radius: var(--radius); padding: 40px 20px;
  text-align: center; color: var(--muted); font-size: 15px; background: var(--surface);
}
.media img, .media video { max-width: 100%; border-radius: 10px; }
.todo { color: var(--muted); font-style: italic; }
.figure { margin: 28px 0; }
.figure img { display: block; width: 100%; height: auto; border-radius: var(--radius); border: 1px solid var(--border); }
.figure video { display: block; width: 100%; height: auto; border-radius: var(--radius); border: 1px solid var(--border); background: #000; }
.gallery { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 20px; margin: 28px 0; }
.gallery .figure { margin: 0; }
.figure figcaption { margin-top: 8px; font-size: 14px; color: var(--muted); text-align: center; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); padding: 32px 0 48px; color: var(--muted); font-size: 15px; }
.site-footer a { color: var(--muted); }

@media (max-width: 560px) {
  .nav a { margin-left: 14px; }
  .hero { padding-top: 56px; }
}

:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; border-radius: 6px; }