:root {
  color-scheme: dark;
  --bg: #06101a;
  --bg-deep: #0a1a28;
  --panel: rgba(7, 22, 35, 0.9);
  --panel-border: rgba(93, 226, 209, 0.32);
  --text: #d8f1f2;
  --muted: #93b8be;
  --accent: #5de2d1;
  --accent-2: #8ae84d;
  --accent-3: #7db6ff;
  --shadow: rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Space Grotesk", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top, rgba(93, 226, 209, 0.14), transparent 28%),
    radial-gradient(circle at 85% 18%, rgba(125, 182, 255, 0.08), transparent 18%),
    linear-gradient(180deg, var(--bg-deep), var(--bg));
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(93, 226, 209, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(93, 226, 209, 0.06) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, rgba(0,0,0,0.45), transparent 90%);
  mask-image: linear-gradient(180deg, rgba(0,0,0,0.45), transparent 90%);
}

h1, h2, h3, h4, p { margin: 0; }

h1, h2, h3, h4,
.eyebrow, .command { font-family: "IBM Plex Mono", monospace; }

h1 { font-size: clamp(1.35rem, 3vw, 2rem); }
h3 { font-size: clamp(1.1rem, 2vw, 1.5rem); }

.eyebrow {
  color: var(--accent-2);
  letter-spacing: 0.22em;
  font-size: 0.72rem;
  text-transform: uppercase;
  margin-bottom: 0.55rem;
}

.subhead {
  margin-top: 0.35rem;
  color: var(--muted);
  line-height: 1.5;
}

.command {
  color: var(--accent);
  font-size: 0.85rem;
}

/* ── Layout ────────────────────────────────────────────────── */

.topbar,
.shell {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 1rem;
  padding: 1.5rem 0 1rem;
}

.shell {
  display: grid;
  gap: 1rem;
  padding-bottom: 2rem;
}

/* ── Panel ─────────────────────────────────────────────────── */

.panel {
  border: 1px solid var(--panel-border);
  background: linear-gradient(180deg, rgba(15, 34, 51, 0.92), var(--panel));
  box-shadow: 0 14px 32px var(--shadow);
  border-radius: 20px;
  position: relative;
  overflow: hidden;
}

.panel::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  border: 1px solid rgba(138, 232, 77, 0.08);
}

.section {
  padding: clamp(1.25rem, 3vw, 2rem);
}

.hero {
  padding: clamp(1.25rem, 4vw, 2.5rem);
  display: grid;
  gap: 1rem;
}

.hero-note {
  color: var(--muted);
  line-height: 1.6;
  max-width: 60ch;
}

.inline-code {
  color: var(--accent-3);
  font-family: "IBM Plex Mono", monospace;
}

/* ── Gallery cards ─────────────────────────────────────────── */

.gallery {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  margin-top: 1.25rem;
}

.card {
  border: 1px solid rgba(93, 226, 209, 0.18);
  background: rgba(5, 16, 25, 0.78);
  border-radius: 18px;
  overflow: hidden;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.card:hover {
  border-color: rgba(93, 226, 209, 0.5);
  transform: translateY(-2px);
}

.card-link {
  display: block;
  color: inherit;
  text-decoration: none;
}

.card-link:focus-visible {
  outline: 2px solid rgba(93, 226, 209, 0.75);
  outline-offset: 4px;
}

.card-preview {
  height: 120px;
  background:
    linear-gradient(135deg, rgba(93, 226, 209, 0.12), transparent 40%),
    linear-gradient(90deg, transparent 49%, rgba(138, 232, 77, 0.25) 50%, transparent 51%),
    linear-gradient(transparent 49%, rgba(93, 226, 209, 0.18) 50%, transparent 51%),
    #0a2234;
  background-size: auto, 20px 20px, 20px 20px, auto;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "IBM Plex Mono", monospace;
  font-size: 1.75rem;
  color: rgba(93, 226, 209, 0.5);
}

.thumb-vis {
  width: 100%;
  height: 100%;
  padding: 0.35rem 0.45rem 0.15rem;
  pointer-events: none;
}

.thumb-vis .vega-embed,
.thumb-vis .vega-embed > div,
.thumb-vis svg {
  width: 100%;
  height: 100%;
}

.card-preview-alt {
  background:
    linear-gradient(135deg, rgba(138, 232, 77, 0.12), transparent 40%),
    linear-gradient(90deg, transparent 49%, rgba(93, 226, 209, 0.22) 50%, transparent 51%),
    linear-gradient(transparent 49%, rgba(138, 232, 77, 0.18) 50%, transparent 51%),
    #081d2b;
  background-size: auto, 20px 20px, 20px 20px, auto;
}

.card-preview-alt .card-icon { color: rgba(138, 232, 77, 0.5); }

.card-body {
  padding: 1rem 1.1rem 1.2rem;
}

.card-body h4 {
  font-size: 0.95rem;
  color: var(--text);
  margin-bottom: 0.3rem;
}

.card-body p {
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.5;
}

.tag {
  display: inline-block;
  margin-top: 0.65rem;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.68rem;
  color: var(--accent);
  border: 1px solid rgba(93, 226, 209, 0.3);
  padding: 0.2rem 0.5rem;
  border-radius: 999px;
  letter-spacing: 0.04em;
}

.anatomy-list {
  display: grid;
  gap: 0.75rem;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.6;
}

.anatomy-list dt {
  font-family: "IBM Plex Mono", monospace;
  color: var(--accent);
  font-size: 0.78rem;
}

.anatomy-list dd {
  margin: 0.15rem 0 0 0;
}

/* ── Back nav ──────────────────────────────────────────────── */

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  text-decoration: none;
  color: var(--muted);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
  border: 1px solid rgba(93, 226, 209, 0.2);
  padding: 0.55rem 0.9rem;
  border-radius: 999px;
  transition: color 0.2s, border-color 0.2s;
}

.back-link:hover { color: var(--accent); border-color: rgba(93, 226, 209, 0.6); }

/* ── Chart wrapper ─────────────────────────────────────────── */

.chart-wrap {
  width: 100%;
  min-height: 400px;
}

/* Vega-Embed action menu overrides */
.vega-actions a {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.75rem;
  color: var(--muted) !important;
}

/* ── Backdrop ──────────────────────────────────────────────── */

.backdrop-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 20% 20%, rgba(138, 232, 77, 0.07), transparent 20%),
    radial-gradient(circle at 80% 10%, rgba(93, 226, 209, 0.07), transparent 18%);
}