:root {
  --bg: #0b0c0e;
  --foam: #eef1f4;
  --text: #d3d7dc;
  --muted: #8a9199;
  --glow: #a9b8c4;
  --line: rgba(255, 255, 255, 0.12);
  --panel: rgba(14, 15, 18, 0.78);
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SFMono-Regular", "JetBrains Mono", Menlo, Consolas, monospace;
  color-scheme: dark;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: var(--glow); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--foam); }

img { max-width: 100%; height: auto; display: block; }

:focus-visible { outline: 2px solid var(--glow); outline-offset: 3px; border-radius: 4px; }

.skip { position: absolute; left: -999px; top: 8px; }
.skip:focus { left: 16px; z-index: 50; background: var(--bg); padding: 6px 12px; }

/* WebGL contour field behind everything */
#field {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  display: block;
  pointer-events: none;
}

.page { position: relative; z-index: 1; }

/* Header / tabs */
.top {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px clamp(16px, 4vw, 40px);
  background: linear-gradient(180deg, rgba(11, 12, 14, 0.8), rgba(11, 12, 14, 0));
}

.brand {
  font: 600 15px/1 var(--mono);
  letter-spacing: 0.04em;
  color: var(--foam);
  text-decoration: none;
}
.brand span { color: var(--glow); }

.tabs { display: flex; gap: 4px; }
.tabs a {
  font: 500 14px/1 var(--sans);
  letter-spacing: 0.02em;
  color: var(--muted);
  text-decoration: none;
  padding: 9px 14px;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: color .2s, border-color .2s, background .2s;
}
.tabs a:hover { color: var(--foam); border-color: var(--line); }
.tabs a[aria-current="page"] {
  color: var(--foam);
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.06);
}

/* Footer */
.foot {
  position: relative;
  z-index: 1;
  padding: 40px 16px 48px;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
}
.foot a { color: var(--muted); }
.foot a:hover { color: var(--foam); }
.foot .sep { opacity: .4; margin: 0 8px; }

@media (max-width: 520px) {
  body { font-size: 16px; }
  .brand { font-size: 13px; }
  .tabs a { padding: 8px 11px; font-size: 13px; }
}