/* ==========================================================================
   GEO Index — shared documentation design system
   Retro-futuristic / technical. Dark, legible, cohesive.
   Used by: technical-overview.html, function-reference.html,
            data-flow-diagram.html, index.html
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Chakra+Petch:wght@400;500;600;700&family=Hanken+Grotesk:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;700&display=swap');

:root {
  /* surfaces */
  --bg:        #080b11;
  --bg-grid:   #0b1018;
  --panel:     #0f1622;
  --panel-2:   #131d2c;
  --raised:    #18243553;

  /* ink */
  --ink:       #dde7f4;
  --ink-soft:  #aab8cd;
  --muted:     #7488a3;
  --faint:     #4d5d76;

  /* accents */
  --teal:      #29e5b9;
  --teal-deep: #11b596;
  --indigo:    #7b85ff;
  --pink:      #ff5d8f;
  --amber:     #ffb454;

  /* lines + glow */
  --line:      rgba(140, 165, 200, 0.12);
  --line-soft: rgba(140, 165, 200, 0.07);
  --glow-teal: 0 0 0 1px rgba(41,229,185,.25), 0 8px 30px -12px rgba(41,229,185,.35);

  /* type */
  --display: 'Chakra Petch', 'Segoe UI', sans-serif;
  --body:    'Hanken Grotesk', 'Segoe UI', system-ui, sans-serif;
  --mono:    'JetBrains Mono', ui-monospace, 'Cascadia Code', monospace;

  --maxw: 1080px;
  --radius: 14px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--body);
  color: var(--ink);
  line-height: 1.65;
  background-color: var(--bg);
  background-image:
    radial-gradient(900px 500px at 12% -8%, rgba(123,133,255,.10), transparent 60%),
    radial-gradient(800px 460px at 100% 0%, rgba(41,229,185,.08), transparent 55%),
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: auto, auto, 46px 46px, 46px 46px;
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* ---- skip + a11y ---- */
.skip { position: absolute; left: -999px; }
.skip:focus { left: 12px; top: 12px; background: var(--teal); color: #04130f; padding: 8px 14px; border-radius: 8px; z-index: 50; }

/* ---- top bar ---- */
.topbar {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; gap: 18px;
  padding: 14px clamp(16px, 4vw, 40px);
  background: rgba(8, 11, 17, 0.82);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 11px; font-family: var(--display); font-weight: 700; letter-spacing: .5px; color: var(--ink); text-decoration: none; }
.brand .mark {
  width: 26px; height: 26px; border-radius: 7px; flex: none;
  background: conic-gradient(from 210deg, var(--teal), var(--indigo), var(--pink), var(--teal));
  box-shadow: 0 0 18px -4px var(--teal);
}
.brand small { color: var(--muted); font-family: var(--mono); font-weight: 500; font-size: .68rem; letter-spacing: 1px; text-transform: uppercase; }
.topnav { margin-left: auto; display: flex; gap: 4px; flex-wrap: wrap; }
.topnav a {
  font-family: var(--mono); font-size: .76rem; letter-spacing: .3px;
  color: var(--ink-soft); text-decoration: none; padding: 7px 12px; border-radius: 8px;
  border: 1px solid transparent; transition: .18s;
}
.topnav a:hover { color: var(--ink); border-color: var(--line); background: var(--raised); }
.topnav a.active { color: var(--teal); border-color: rgba(41,229,185,.3); }

/* ---- layout shells ---- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 clamp(16px, 4vw, 40px); }
main { padding-block: clamp(28px, 5vw, 56px) 80px; }

.hero { padding-block: clamp(36px, 6vw, 72px) clamp(20px, 3vw, 32px); }
.eyebrow {
  font-family: var(--mono); font-size: .72rem; letter-spacing: 3px; text-transform: uppercase;
  color: var(--teal); margin: 0 0 14px;
}
h1 {
  font-family: var(--display); font-weight: 700; letter-spacing: -.5px;
  font-size: clamp(2rem, 5vw, 3.3rem); line-height: 1.05; margin: 0 0 18px;
}
h1 .grad {
  background: linear-gradient(100deg, var(--teal), var(--indigo) 70%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lede { font-size: clamp(1.02rem, 2vw, 1.22rem); color: var(--ink-soft);  margin: 0; }

h2 {
  font-family: var(--display); font-weight: 600; letter-spacing: -.2px;
  font-size: clamp(1.4rem, 3vw, 1.9rem); margin: 56px 0 18px; padding-top: 8px;
  scroll-margin-top: 80px;
}
h2 .num { color: var(--teal); font-family: var(--mono); font-size: .62em; margin-right: 12px; opacity: .85; }
h3 {
  font-family: var(--display); font-weight: 600; font-size: 1.12rem;
  margin: 32px 0 10px; color: var(--ink); scroll-margin-top: 80px;
}
p { margin: 0 0 16px; }
a { color: var(--teal); text-decoration-color: rgba(41,229,185,.4); text-underline-offset: 3px; }
strong { color: #eef4fc; font-weight: 600; }
hr.rule { border: 0; border-top: 1px solid var(--line); margin: 48px 0; }

ul, ol { padding-left: 22px; }
li { margin: 6px 0; }
li::marker { color: var(--teal-deep); }

/* ---- cards / panels ---- */
.card {
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 24px;
}
.grid { display: grid; gap: 16px; }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 820px) { .grid.cols-2, .grid.cols-3, .grid.cols-4 { grid-template-columns: 1fr; } }

.kpi { padding: 18px 20px; }
.kpi .v { font-family: var(--display); font-weight: 700; font-size: 1.9rem; color: var(--teal); line-height: 1; }
.kpi .k { color: var(--muted); font-size: .82rem; margin-top: 8px; font-family: var(--mono); letter-spacing: .3px; }

.callout {
  border-left: 3px solid var(--indigo);
  background: var(--raised);
  border-radius: 0 12px 12px 0;
  padding: 14px 18px; margin: 20px 0;
  color: var(--ink-soft);
}
.callout strong { color: var(--indigo); }
.callout.teal { border-left-color: var(--teal); }
.callout.teal strong { color: var(--teal); }
.callout.amber { border-left-color: var(--amber); }
.callout.amber strong { color: var(--amber); }

/* ---- pills / badges ---- */
.pill {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--mono); font-size: .72rem; letter-spacing: .4px;
  padding: 3px 10px; border-radius: 999px; border: 1px solid var(--line);
  color: var(--ink-soft); background: var(--raised); white-space: nowrap;
}
.pill.get  { color: var(--teal);   border-color: rgba(41,229,185,.35); }
.pill.post { color: var(--amber);  border-color: rgba(255,180,84,.35); }
.pill.wp   { color: var(--indigo); border-color: rgba(123,133,255,.35); }
.pill.api  { color: var(--pink);   border-color: rgba(255,93,143,.35); }

/* ---- code ---- */
code {
  font-family: var(--mono); font-size: .86em;
  background: rgba(123,133,255,.10); color: #cdd7ff;
  padding: 1px 6px; border-radius: 6px; border: 1px solid var(--line-soft);
}
pre {
  font-family: var(--mono); font-size: .82rem; line-height: 1.6;
  background: #070a0f; border: 1px solid var(--line); border-radius: 12px;
  padding: 18px 20px; overflow-x: auto; margin: 16px 0;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.015);
}
pre code { background: none; border: 0; padding: 0; color: #c7d3e6; }
.tok-key { color: var(--teal); }
.tok-str { color: var(--amber); }
.tok-com { color: var(--faint); font-style: italic; }
.tok-fn  { color: var(--indigo); }

/* ---- tables ---- */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); margin: 18px 0; }
table { width: 100%; border-collapse: collapse; font-size: .9rem; min-width: 560px; }
thead th {
  text-align: left; font-family: var(--mono); font-weight: 600; font-size: .72rem;
  letter-spacing: .8px; text-transform: uppercase; color: var(--teal);
  background: #0b1320; padding: 12px 16px; border-bottom: 1px solid var(--line);
  position: sticky; top: 0;
}
tbody td { padding: 11px 16px; border-bottom: 1px solid var(--line-soft); vertical-align: top; color: var(--ink-soft); }
tbody tr:last-child td { border-bottom: 0; }
tbody tr:hover td { background: rgba(123,133,255,.05); }
td code { white-space: nowrap; }

/* ---- function reference specifics ---- */
.toc {
  position: sticky; top: 76px;
  font-family: var(--mono); font-size: .8rem; line-height: 1.9;
}
.toc a { display: block; color: var(--ink-soft); text-decoration: none; padding: 2px 0 2px 12px; border-left: 2px solid var(--line); }
.toc a:hover { color: var(--teal); border-left-color: var(--teal); }
.toc .grp { color: var(--muted); text-transform: uppercase; letter-spacing: 1px; font-size: .68rem; margin: 14px 0 4px; }

.fn {
  border: 1px solid var(--line); border-radius: 12px;
  padding: 14px 16px; margin: 10px 0; background: var(--panel);
}
.fn .sig { font-family: var(--mono); font-size: .86rem; color: var(--teal); margin: 0 0 4px; word-break: break-word; }
.fn .sig .ret { color: var(--muted); }
.fn p { margin: 4px 0 0; color: var(--ink-soft); font-size: .92rem; }

.file-head {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  font-family: var(--mono); font-size: .82rem; color: var(--muted);
  margin: 30px 0 6px;
}
.file-head .path { color: var(--ink); }

/* ---- footer ---- */
.foot {
  border-top: 1px solid var(--line); margin-top: 64px;
  padding: 30px clamp(16px,4vw,40px); color: var(--muted);
  font-family: var(--mono); font-size: .78rem;
  display: flex; gap: 16px; flex-wrap: wrap; align-items: center;
}
.foot a { color: var(--ink-soft); }

/* ---- two-column doc layout ---- */
.doc-cols { display: grid; grid-template-columns: 230px 1fr; gap: 40px; align-items: start; }
@media (max-width: 920px) { .doc-cols { grid-template-columns: 1fr; } .toc { position: static; margin-bottom: 24px; } }

/* ---- motion ---- */
@media (prefers-reduced-motion: no-preference) {
  .reveal { animation: rise .7s cubic-bezier(.2,.7,.2,1) both; }
  .reveal:nth-child(2){ animation-delay:.06s } .reveal:nth-child(3){ animation-delay:.12s }
  .reveal:nth-child(4){ animation-delay:.18s } .reveal:nth-child(5){ animation-delay:.24s }
  @keyframes rise { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
}