/* bodby — revamp. Dark-first, light supported. System fonts only. */

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

:root {
  color-scheme: dark light;
  --bg: #0b0d1a;
  --bg2: #141833;
  --fg: #e8ebff;
  --muted: #9aa3cf;
  --line: #262c55;
  --accent: #7ee787;
  --accent-ink: #06210c;
  --card: #12163180;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #f6f4ec;
    --bg2: #e6e9ff;
    --fg: #14172e;
    --muted: #55608f;
    --line: #cdd3f5;
    --accent: #1f9d3d;
    --accent-ink: #ffffff;
    --card: #ffffffb0;
  }
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}

a { color: inherit; text-underline-offset: 3px; }
a:hover { color: var(--accent); }
code, pre { font-family: var(--mono); font-size: .95rem; }
.wrap { width: min(70rem, 100% - 2rem); margin-inline: auto; }

/* ---------- top bar ---------- */
header.top {
  position: sticky; top: 0; z-index: 10;
  backdrop-filter: blur(10px);
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  border-bottom: 1px solid var(--line);
}
header.top .wrap { display: flex; align-items: center; gap: 1.5rem; padding-block: .75rem; flex-wrap: wrap; }
.brand { font-family: var(--mono); font-weight: 700; text-decoration: none; margin-right: auto; }
.brand::before { content: "$ "; color: var(--accent); }
header.top nav { display: flex; gap: 1.25rem; font-family: var(--mono); font-size: .95rem; }
header.top nav a { text-decoration: none; color: var(--muted); }
header.top nav a:hover, header.top nav a[aria-current] { color: var(--accent); }

/* ---------- hero with 3D scene ---------- */
.hero {
  position: relative;
  min-height: min(44rem, 88vh);
  background:
    radial-gradient(60rem 30rem at 75% 40%, color-mix(in srgb, var(--accent) 18%, transparent), transparent 70%),
    linear-gradient(180deg, var(--bg2), var(--bg));
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}
#scene { position: absolute; inset: 0; }
@media (min-width: 761px) {
  #scene { left: 36%; }
}
#scene canvas { display: block; touch-action: pan-y; }
#scene.no-webgl::after {
  content: "🐧"; position: absolute; right: 18%; top: 28%; font-size: 8rem;
}
.hero .wrap { position: relative; z-index: 1; min-height: inherit; display: flex; align-items: center; pointer-events: none; }
.hero-copy { max-width: 28rem; padding-block: 3rem; pointer-events: auto; }
.hero .tag { font-family: var(--mono); color: var(--accent); font-size: .95rem; }
.hero h1 { font-size: clamp(2.4rem, 7vw, 4.2rem); line-height: 1.05; margin: .4rem 0 1rem; letter-spacing: -.02em; }
.hero p { color: var(--muted); font-size: 1.1rem; }
.hero p + p { margin-top: .75rem; }
.cta { display: flex; gap: .75rem; flex-wrap: wrap; margin-top: 1.5rem; }
.btn {
  display: inline-block; font-family: var(--mono); text-decoration: none;
  padding: .6rem 1rem; border-radius: .6rem; border: 2px solid var(--fg);
  box-shadow: 3px 3px 0 var(--fg); transition: transform .1s, box-shadow .1s;
}
.btn:hover { transform: translate(2px, 2px); box-shadow: 1px 1px 0 var(--fg); color: inherit; }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--fg); }
.hint { margin-top: 1rem; font-size: .85rem; color: var(--muted); font-family: var(--mono); }

@media (max-width: 760px) {
  .hero { min-height: 52rem; }
  .hero .wrap { align-items: flex-start; }
  #scene { top: 22rem; }
}

/* ---------- sections ---------- */
section.block { padding-block: 3.5rem; border-bottom: 1px solid var(--line); }
section.block h2 { font-family: var(--mono); font-size: 1.4rem; margin-bottom: .4rem; }
section.block h2::before { content: "# "; color: var(--accent); }
section.block > .wrap > p.lead { color: var(--muted); margin-bottom: 1.5rem; max-width: 40rem; }

.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(16rem, 1fr)); gap: 1rem; list-style: none; }
.card {
  background: var(--card); border: 2px solid var(--line); border-radius: 1rem;
  padding: 1.1rem; transition: transform .15s, border-color .15s;
}
.card:hover { transform: translateY(-3px) rotate(-.4deg); border-color: var(--accent); }
.card h3 { font-family: var(--mono); font-size: 1.05rem; }
.card h3 a { text-decoration: none; }
.card p { color: var(--muted); font-size: .95rem; margin-top: .4rem; }
.card .meta { margin-top: .75rem; font-family: var(--mono); font-size: .8rem; color: var(--muted); display: flex; gap: 1rem; flex-wrap: wrap; }

.contact { display: grid; grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr)); gap: 1rem; }
.contact dt { font-family: var(--mono); color: var(--accent); font-size: .85rem; }
.contact dd { word-break: break-word; }

/* ---------- article pages ---------- */
main.page { padding-block: 3rem; max-width: 46rem; }
main.page h1 { font-size: clamp(1.8rem, 5vw, 2.6rem); line-height: 1.1; margin-bottom: .75rem; }
main.page h2 { margin-top: 2rem; font-family: var(--mono); }
main.page p, main.page ul, main.page pre { margin: 1em 0; }
main.page ul li { margin-left: 1.25em; }
main.page p.abstract { font-style: italic; color: var(--muted); }
main.page p.published, main.page small { color: var(--muted); font-family: var(--mono); font-size: .85rem; }
pre {
  background: #0d1020; color: #d7ddff; padding: 1rem; border-radius: .75rem;
  border: 2px solid var(--line); overflow-x: auto;
}
:not(pre) > code { background: color-mix(in srgb, var(--accent) 14%, transparent); padding: .1em .35em; border-radius: .3em; }
.post-list { list-style: none; margin-top: 1.5rem; }
.post-list li { margin: 0 0 1.25rem; padding: 0; }
.post-list a { font-size: 1.15rem; font-weight: 600; }
.empty { color: var(--muted); font-family: var(--mono); }

footer.site { padding-block: 2rem; color: var(--muted); font-size: .9rem; }
footer.site nav { display: flex; gap: 1.25rem; flex-wrap: wrap; margin-bottom: .75rem; font-family: var(--mono); }
footer.site p { margin: .35rem 0; }

@media (prefers-reduced-motion: reduce) {
  .card, .btn { transition: none; }
}