/* Landing page styles (v3). One dark theme; WCAG AA contrast throughout.
   Each project card carries its own accent colour and self-hosted display font. */
@font-face { font-family: 'Michroma'; font-style: normal; font-weight: 400; font-display: swap; src: url('/assets/michroma-latin-400-normal.woff2') format('woff2'); }
@font-face { font-family: 'Cormorant Garamond'; font-style: normal; font-weight: 700; font-display: swap; src: url('/assets/cormorant-garamond-latin-700-normal.woff2') format('woff2'); }
@font-face { font-family: 'Fraunces'; font-style: normal; font-weight: 700; font-display: swap; src: url('/assets/fraunces-latin-700-normal.woff2') format('woff2'); }
@font-face { font-family: 'Big Shoulders Stencil Display'; font-style: normal; font-weight: 700; font-display: swap; src: url('/assets/big-shoulders-stencil-display-latin-700-normal.woff2') format('woff2'); }
@font-face { font-family: 'Playfair Display'; font-style: normal; font-weight: 700; font-display: swap; src: url('/assets/playfair-display-latin-700-normal.woff2') format('woff2'); }

:root {
  --bg: #0b0f14;
  --bg-2: #10161e;
  --surface: #141b24;
  --line: #2a3542;
  --text: #edf1f6;
  --muted: #a9b5c4;
  --accent: #8ec1ff;
  --focus: #ffd166;
  --radius: 16px;
  --wrap: 72rem;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; animation: none !important; } }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: clamp(1rem, 0.96rem + 0.2vw, 1.0625rem);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-underline-offset: 0.18em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; border-radius: 4px; }
.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; margin: -1px; padding: 0; border: 0;
  clip: rect(0 0 0 0); clip-path: inset(50%); overflow: hidden; white-space: nowrap;
}
.skip-link { position: absolute; left: -9999px; top: 0; z-index: 100; background: var(--focus); color: #111; padding: 0.5rem 1rem; border-radius: 0 0 8px 0; font-weight: 600; }
.skip-link:focus { left: 0; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 10;
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 0.5rem 1.5rem;
  padding: 0.75rem max(1.2rem, calc((100vw - var(--wrap)) / 2));
  background: rgba(11, 15, 20, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-title { display: inline-flex; align-items: center; gap: 0.6rem; margin: 0; font-weight: 700; font-size: 1.02rem; letter-spacing: 0.01em; color: var(--text); text-decoration: none; }
.logo { width: 1.3rem; height: 1.3rem; border-radius: 6px; background: conic-gradient(from 200deg, #e87722, #f2b25c, #ffd100, #6e9b4e, #7fb7d6, #e87722); }
.site-header nav { display: flex; gap: 1.2rem; }
.site-header nav a { color: var(--muted); text-decoration: none; font-weight: 500; padding: 0.4rem 0; }
.site-header nav a:hover, .site-header nav a[aria-current="page"] { color: var(--text); }

main { overflow-x: clip; }

/* Hero */
.hero {
  position: relative;
  max-width: var(--wrap); margin: 0 auto; padding: 4.5rem 1.2rem 3rem;
}
.hero::before {
  content: ""; position: absolute; inset: 0 -30vw; z-index: -1;
  background:
    radial-gradient(40rem 20rem at 15% 0%, rgba(232, 119, 34, 0.14), transparent 70%),
    radial-gradient(36rem 22rem at 85% 10%, rgba(127, 183, 214, 0.16), transparent 70%);
}
.eyebrow { margin: 0 0 1rem; color: var(--muted); font-size: 0.85rem; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; }
.hero h1 { font-size: clamp(2.1rem, 1.4rem + 3.4vw, 4rem); line-height: 1.05; letter-spacing: -0.025em; margin: 0 0 1.1rem; max-width: 18ch; }
.tagline { font-size: clamp(1.05rem, 1rem + 0.4vw, 1.25rem); color: var(--muted); max-width: 42rem; margin: 0 0 1.6rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 1.2rem; align-items: center; margin: 0 0 2.5rem; }
.stats { list-style: none; margin: 0; padding: 1.2rem 0 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1rem; border-top: 1px solid var(--line); }
.stats li { color: var(--muted); font-size: 0.92rem; line-height: 1.4; }
.stats strong { display: block; color: var(--text); font-size: 1.15rem; }
@media (max-width: 760px) { .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); } .hero { padding-top: 2.5rem; } }

/* Buttons */
.button {
  display: inline-flex; align-items: center; min-height: 44px;
  background: var(--card-accent, var(--accent)); color: #0b0f14; text-decoration: none;
  border-radius: 999px; padding: 0.55rem 1.2rem; font-weight: 700; line-height: 1.25;
  transition: filter 0.15s ease, transform 0.15s ease;
}
.button:hover { filter: brightness(1.08); transform: translateY(-1px); }
.link { display: inline-block; padding: 0.65rem 0; line-height: 1.4; font-weight: 600; }
/* "About the approach" disclosure next to the Browse button */
.button-ghost { background: transparent; color: var(--text); border: 1px solid var(--line); cursor: pointer; }
.button-ghost:hover { border-color: var(--text); }
.about-panel { position: relative; }
.about-panel > summary { list-style: none; }
.about-panel > summary::-webkit-details-marker { display: none; }
.about-panel > summary::after { content: "▾"; margin-left: 0.5rem; transition: transform 0.15s ease; }
.about-panel[open] > summary::after { transform: rotate(180deg); }
.about-panel > summary:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
.about-body {
  position: absolute; top: calc(100% + 0.6rem); left: 0; z-index: 20;
  width: min(46rem, calc(100vw - 2.4rem)); max-height: min(70vh, 40rem); overflow-y: auto;
  padding: 1.2rem 1.4rem; border: 1px solid var(--line); border-radius: 14px;
  background: var(--bg-2); color: var(--muted); box-shadow: 0 18px 48px rgba(0, 0, 0, 0.45);
}
@media (max-width: 560px) { .about-panel { position: static; } .hero-actions { position: relative; } .about-body { left: 0; width: 100%; } }
.about-body .prose > :first-child { margin-top: 0; }
@media (prefers-reduced-motion: reduce) { .about-panel > summary::after { transition: none; } }

/* Projects */
#projects { max-width: var(--wrap); margin: 0 auto; padding: 1rem 1.2rem 3rem; scroll-margin-top: 4rem; }
.section-head { display: flex; justify-content: space-between; align-items: end; flex-wrap: wrap; gap: 1rem; margin-bottom: 1.4rem; }
.section-head h2 { margin: 0; font-size: clamp(1.5rem, 1.2rem + 1vw, 2rem); letter-spacing: -0.015em; }
.filters { display: flex; gap: 0.4rem; flex-wrap: wrap; }
.filter-btn {
  font: inherit; font-size: 0.92rem; font-weight: 600; min-height: 44px;
  background: transparent; color: var(--muted);
  border: 1px solid var(--line); border-radius: 999px; padding: 0.35rem 1rem; cursor: pointer;
}
.filter-btn:hover { color: var(--text); border-color: var(--muted); }
.filter-btn[aria-pressed="true"] { background: var(--text); border-color: var(--text); color: #0b0f14; }
.cards {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 1.4rem;
}
.card { grid-column: span 2; }
.card-wide { grid-column: span 3; }
@media (max-width: 980px) { .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); } .card, .card-wide { grid-column: span 1; } }
@media (max-width: 640px) { .cards { grid-template-columns: 1fr; } }
.card {
  position: relative; margin: 0;
  display: flex; flex-direction: column;
  background: linear-gradient(180deg, color-mix(in srgb, var(--card-accent, var(--accent)) 9%, var(--surface)) 0%, var(--surface) 55%);
  border: 1px solid var(--line);
  border-radius: var(--radius); overflow: hidden;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}
.card:hover, .card:focus-within {
  border-color: color-mix(in srgb, var(--card-accent, var(--accent)) 70%, var(--line));
  transform: translateY(-3px);
  box-shadow: 0 18px 40px -20px color-mix(in srgb, var(--card-accent, var(--accent)) 55%, transparent);
}
.poster-wrap { position: relative; aspect-ratio: 1200 / 630; background: #000; overflow: hidden; }
.poster { width: 100%; height: 100%; display: block; object-fit: cover; transition: transform 0.5s ease; }
.card:hover .poster { transform: scale(1.03); }
.poster-wrap::after { content: ""; position: absolute; inset: auto 0 0; height: 40%; background: linear-gradient(transparent, rgba(11, 15, 20, 0.55)); pointer-events: none; }
.poster-fallback { background: linear-gradient(135deg, #1d2430, #0e1116); aspect-ratio: 1200 / 630; }
.badge {
  position: absolute; top: 0.8rem; left: 0.8rem; z-index: 1;
  font-size: 0.75rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase;
  background: rgba(11, 15, 20, 0.82); color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.18); border-radius: 999px; padding: 0.2rem 0.65rem;
}
.badge-soon { position: static; margin: 0 1.2rem 1rem; align-self: flex-start; }
.card-body { display: flex; flex-direction: column; gap: 0.6rem; padding: 1.1rem 1.25rem 1.25rem; flex: 1; }
.kicker { margin: 0; display: flex; align-items: center; gap: 0.6rem; color: var(--muted); font-size: 0.8rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; }
.num { display: inline-grid; place-items: center; min-width: 2rem; height: 1.5rem; border-radius: 6px; background: var(--card-accent, var(--accent)); color: #0b0f14; font-size: 0.75rem; letter-spacing: 0.02em; }
.card h3 { margin: 0; font-family: var(--card-font, inherit); font-size: var(--card-title-size, 1.4rem); line-height: 1.15; letter-spacing: var(--card-tracking, 0); }
.card-wide h3 { font-size: calc(var(--card-title-size, 1.4rem) * 1.15); }
.card .summary { margin: 0; color: #d3dbe5; }
.facts { margin: 0.2rem 0 0; display: grid; gap: 0.25rem; font-size: 0.9rem; }
.facts div { display: grid; grid-template-columns: 4.5rem 1fr; gap: 0.5rem; }
.facts dt { color: var(--muted); }
.facts dd { margin: 0; }
.features { list-style: none; display: flex; flex-wrap: wrap; gap: 0.35rem; margin: 0.2rem 0 0; padding: 0; }
.features li { font-size: 0.8rem; border: 1px solid var(--line); border-radius: 999px; padding: 0.05rem 0.6rem; color: var(--muted); }
.content-note { margin: 0; font-size: 0.85rem; color: var(--muted); border-left: 3px solid var(--card-accent, var(--accent)); padding-left: 0.6rem; }
.actions { margin: auto 0 0; padding-top: 0.6rem; display: flex; gap: 0.4rem 1.1rem; flex-wrap: wrap; align-items: center; }
.card .link { color: var(--text); font-size: 0.92rem; }

/* Per-project identity: accent, display font, title size */
.card[data-slug="lunar-field-expedition"] { --card-accent: #f08a3c; --card-font: 'Michroma', sans-serif; --card-title-size: 1.12rem; --card-tracking: 0.02em; }
.card[data-slug="object-detective"] { --card-accent: #f2b25c; --card-font: 'Cormorant Garamond', Georgia, serif; --card-title-size: 1.6rem; }
.card[data-slug="hazard-hunt"] { --card-accent: #ffd100; --card-font: 'Big Shoulders Stencil Display', Impact, sans-serif; --card-title-size: 1.7rem; --card-tracking: 0.02em; }
.card[data-slug="field-ecologist"] { --card-accent: #8cc063; --card-font: 'Fraunces', Georgia, serif; --card-title-size: 1.4rem; }
.card[data-slug="glacier-time-machine"] { --card-accent: #8fc6e4; --card-font: 'Playfair Display', Georgia, serif; --card-title-size: 1.45rem; }

/* About */
#about { scroll-margin-top: 5rem; }
#about .prose h2 { font-size: 1.1rem; margin-top: 1.4rem; color: var(--text); }
.prose img { max-width: 100%; }

/* Footer */
.site-footer { border-top: 1px solid var(--line); background: var(--bg-2); padding: 2rem 1.2rem 2.5rem; color: var(--muted); font-size: 0.9rem; }
.site-footer p { max-width: var(--wrap); margin: 0.3rem auto; }

/* Inner pages */
main > h1 { max-width: var(--wrap); margin: 2.5rem auto 1rem; padding: 0 1.2rem; font-size: clamp(1.8rem, 1.4rem + 1.6vw, 2.6rem); letter-spacing: -0.02em; }
main > p, main > section { max-width: var(--wrap); margin-left: auto; margin-right: auto; padding: 0 1.2rem; }
main > section:last-child { padding-bottom: 3rem; }
main table { display: block; overflow-x: auto; border-collapse: collapse; width: 100%; margin: 0.8rem 0; }
main th, main td { border: 1px solid var(--line); padding: 0.35rem 0.55rem; text-align: left; font-size: 0.9rem; }
main th { background: var(--surface); }