/* oracle-varx documentation site — light, colourful, print-clean.
   Author: Dr Merwan Roudane. */

:root {
  /* surfaces */
  --bg: #fbfcfe;
  --surface: #ffffff;
  --surface-2: #f4f7fb;
  --border: #e3e9f2;

  /* text */
  --ink: #16202e;
  --ink-soft: #4b5a70;

  /* accents */
  --indigo: #4f46e5;
  --teal: #0d9488;
  --amber: #f59e0b;
  --rose: #e11d48;
  --sky: #0284c7;

  --grad: linear-gradient(135deg, #6366f1 0%, #0ea5e9 50%, #14b8a6 100%);

  --radius: 16px;
  --shadow: 0 1px 2px rgba(16, 32, 56, 0.06), 0 8px 24px rgba(16, 32, 56, 0.08);
  --font: "Inter", "Segoe UI", system-ui, sans-serif;
  --serif: "Source Serif 4", Georgia, serif;
  --mono: "JetBrains Mono", "Cascadia Code", ui-monospace, monospace;

  --maxw: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 76px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16.5px/1.7 var(--font);
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 16px; }

a { color: var(--sky); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------------------------------------------------------------- top bar */
header.bar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}
header.bar.scrolled { border-bottom-color: var(--border); }
header.bar .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 58px;
}
.brand { font-weight: 700; letter-spacing: -0.01em; font-size: 1.05rem; }
.brand span { color: var(--indigo); }
nav.links { display: flex; gap: 18px; flex-wrap: wrap; align-items: center; }
nav.links a { color: var(--ink-soft); font-size: 0.92rem; font-weight: 500; }
nav.links a:hover { color: var(--indigo); text-decoration: none; }
nav.links a.icon { color: var(--ink); font-weight: 600; }

/* ------------------------------------------------------------------- hero */
.hero { background: var(--grad); color: #fff; padding: 64px 0 56px; }
.hero h1 { margin: 0 0 10px; font-size: clamp(2rem, 5vw, 3rem); letter-spacing: -0.02em; }
.hero p.pitch { margin: 0 0 6px; font-size: clamp(1.02rem, 2.2vw, 1.2rem); max-width: 68ch; opacity: 0.97; }
.hero p.cite { margin: 10px 0 22px; font-size: 0.88rem; opacity: 0.85; max-width: 72ch; }
.hero a { color: #fff; text-decoration: underline; }

.install {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 12px;
  padding: 10px 14px;
  font-family: var(--mono);
  font-size: 0.95rem;
  margin-bottom: 22px;
}
.install button {
  background: rgba(255, 255, 255, 0.9);
  color: var(--ink);
  border: 0;
  border-radius: 8px;
  padding: 5px 10px;
  font: 600 0.78rem var(--font);
  cursor: pointer;
}
.buttons { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-block;
  padding: 11px 20px;
  border-radius: 11px;
  font-weight: 600;
  font-size: 0.94rem;
  background: #fff;
  color: var(--indigo) !important;
  text-decoration: none !important;
  box-shadow: 0 2px 10px rgba(16, 32, 56, 0.14);
}
.btn.ghost { background: rgba(255, 255, 255, 0.14); color: #fff !important; border: 1px solid rgba(255, 255, 255, 0.5); box-shadow: none; }
.pills { margin-top: 20px; display: flex; gap: 8px; flex-wrap: wrap; }
.pill {
  background: rgba(255, 255, 255, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 999px;
  padding: 3px 11px;
  font-size: 0.78rem;
}

/* --------------------------------------------------------------- sections */
section { padding: 58px 0 10px; }
.eyebrow {
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--indigo);
  margin-bottom: 8px;
}
section h2 { margin: 0 0 10px; font-size: clamp(1.4rem, 3vw, 1.9rem); letter-spacing: -0.015em; }
section h3 { margin: 28px 0 8px; font-size: 1.12rem; }
section p, section li { max-width: 74ch; color: var(--ink); }
section p.lead { color: var(--ink-soft); }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 26px 28px;
  margin: 18px 0;
  border-top: 4px solid var(--indigo);
}
.card.teal { border-top-color: var(--teal); }
.card.amber { border-top-color: var(--amber); }
.card.rose { border-top-color: var(--rose); }
.card.sky { border-top-color: var(--sky); }
.card h3:first-child { margin-top: 0; }

.grid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(234px, 1fr)); }
.grid .card { margin: 0; }
.grid .card p { font-size: 0.94rem; color: var(--ink-soft); margin: 6px 0 0; }
.grid .card strong { font-size: 1rem; }
.ico { font-size: 1.5rem; line-height: 1; }

.theory { font-family: var(--serif); font-size: 1.04rem; }
.theory code { font-family: var(--mono); font-size: 0.86em; }

/* ------------------------------------------------------------------- code */
pre {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
  overflow-x: auto;
  position: relative;
  font-size: 14.5px;
  line-height: 1.6;
}
pre, code { font-family: var(--mono); }
code:not(pre code) {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1px 5px;
  font-size: 0.88em;
}
.codewrap { position: relative; }
.codewrap > button {
  position: absolute;
  top: 10px;
  right: 10px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 4px 9px;
  font: 600 0.74rem var(--font);
  color: var(--ink-soft);
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.15s;
}
.codewrap:hover > button { opacity: 1; }
pre.output { background: #fff; font-size: 12.6px; line-height: 1.45; }

/* ----------------------------------------------------------------- tables */
.tablewrap { overflow-x: auto; border-radius: 12px; border: 1px solid var(--border); margin: 16px 0; }
table { border-collapse: collapse; width: 100%; font-size: 0.9rem; background: var(--surface); }
th, td { padding: 9px 13px; text-align: left; border-bottom: 1px solid var(--border); }
th { background: var(--surface-2); font-weight: 600; font-size: 0.82rem; letter-spacing: 0.02em; position: sticky; top: 0; }
tbody tr:nth-child(even) { background: rgba(244, 247, 251, 0.5); }
td.num, th.num { text-align: right; font-family: var(--mono); font-size: 0.86rem; }
tbody tr:last-child td { border-bottom: 0; }

/* --------------------------------------------------------------- callouts */
.note { border-left: 4px solid var(--amber); background: rgba(245, 158, 11, 0.08); padding: 13px 18px; border-radius: 0 10px 10px 0; margin: 18px 0; }
.warn { border-left: 4px solid var(--rose); background: rgba(225, 29, 72, 0.07); padding: 13px 18px; border-radius: 0 10px 10px 0; margin: 18px 0; }
.note p, .warn p { margin: 0; font-size: 0.94rem; }

/* ---------------------------------------------------------------- figures */
figure { margin: 20px 0; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px; box-shadow: var(--shadow); }
figure img { width: 100%; height: auto; border-radius: 9px; display: block; }
figcaption { color: var(--ink-soft); font-size: 0.86rem; margin-top: 10px; }

/* ----------------------------------------------------------------- footer */
footer { margin-top: 56px; padding: 30px 0 40px; border-top: 1px solid var(--border); color: var(--ink-soft); font-size: 0.88rem; }
.authorcard { display: grid; gap: 22px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }

ul.tight { padding-left: 20px; }
ul.tight li { margin: 5px 0; }

@media (max-width: 720px) {
  nav.links { gap: 12px; }
  nav.links a:not(.icon) { display: none; }
  .hero { padding: 44px 0 40px; }
  section { padding: 42px 0 8px; }
  .card { padding: 20px 18px; }
}

@media print {
  header.bar, .buttons, .install, .codewrap > button { display: none !important; }
  body { background: #fff; }
  .hero { background: #fff; color: var(--ink); }
  .hero a, .hero h1 { color: var(--ink); }
  .card, figure, pre { box-shadow: none; break-inside: avoid; }
}