:root {
  /* Same family as spurstore.com -- sampled from geospur.com's real
     computed styles, not guessed. This site is documentation-toned
     rather than marketing-toned, so it leans more on the mono face and
     less on huge hero type, but the palette is identical across the
     whole product family on purpose. */
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-text: #0f172a;
  --color-muted: #64748b;
  --color-border: #e2e8f0;
  --color-border-soft: #eef2f7;

  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-primary-tint: #eff6ff;
  --color-primary-contrast: #ffffff;

  --color-verified: #0d9488;
  --color-verified-tint: #f0fdfa;

  --ink: #0f172a;
  --ink-raised: #1e293b;
  --ink-line: #334155;
  --accent: #60a5fa;
  --text-on-ink: #f8fafc;
  --text-on-ink-soft: #94a3b8;

  --radius-sm: 7px;
  --radius: 12px;
  --max-width: 1180px;

  --shadow-1: 0 1px 2px rgba(15, 23, 42, 0.05), 0 1px 1px rgba(15, 23, 42, 0.04);
  --shadow-2: 0 14px 34px rgba(15, 23, 42, 0.1), 0 3px 10px rgba(15, 23, 42, 0.06);

  --font-display: "Archivo", "Segoe UI Semibold", "Arial Narrow", sans-serif;
  --font-mono: "IBM Plex Mono", "Cascadia Code", "SFMono-Regular", Consolas, monospace;

  font-size: 16px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "IBM Plex Sans", -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

code { font-family: var(--font-mono); }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 1.75rem; }

h1, h2, h3, h4 { font-family: var(--font-display); letter-spacing: -0.01em; margin: 0 0 0.6rem; text-wrap: balance; }
h2 { font-weight: 800; font-size: 1.9rem; }
h3 { font-weight: 700; font-size: 1.15rem; }
h4 { font-weight: 600; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--color-muted); margin-bottom: 0.75rem; }

.lede { font-size: 1.08rem; color: var(--color-muted); max-width: 680px; }
.subtle { color: var(--color-muted); }
.small { font-size: 0.85rem; }

.section-label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 0.6rem;
}

/* --- Header --- */

.site-header { border-bottom: 1px solid var(--color-border); background: var(--color-surface); position: sticky; top: 0; z-index: 10; }
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 1.05rem 1.75rem; flex-wrap: wrap; gap: 0.75rem; }
.brand { display: inline-flex; align-items: center; gap: 0.55rem; }
.brand-mark { width: 26px; height: 26px; flex: none; }
.brand-mark rect { fill: var(--ink); }
.brand-mark path { fill: none; stroke: var(--accent); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.brand-word { font-family: var(--font-display); font-size: 1.1rem; font-weight: 800; color: var(--color-text); }
.brand-word span { color: var(--color-primary); }

.site-nav { display: flex; gap: 1.5rem; align-items: center; flex-wrap: wrap; }
.site-nav a { color: var(--color-muted); font-weight: 600; font-size: 0.9rem; text-decoration: none; }
.site-nav a:hover { color: var(--color-text); }
.site-nav a.site-nav-cta { color: var(--color-primary-contrast); background: var(--ink); padding: 0.45rem 0.9rem; border-radius: var(--radius-sm); }
.site-nav a.site-nav-cta:hover { background: var(--color-primary-dark); color: var(--color-primary-contrast); }

/* --- Buttons --- */

.btn {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.7rem 1.3rem; border-radius: var(--radius-sm); border: 1px solid transparent;
  background: var(--color-primary); color: var(--color-primary-contrast);
  font-weight: 700; font-size: 0.92rem; cursor: pointer; box-shadow: var(--shadow-1);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}
.btn:hover { background: var(--color-primary-dark); color: var(--color-primary-contrast); transform: translateY(-1px); box-shadow: var(--shadow-2); text-decoration: none; }
.btn.secondary { background: transparent; color: var(--color-text); border-color: var(--color-border); box-shadow: none; }
.btn.secondary:hover { background: var(--color-surface); border-color: var(--color-primary); color: var(--color-primary-dark); box-shadow: var(--shadow-1); }
.btn-row { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-top: 1.5rem; }

/* --- Hero --- */

.hero { padding: 3.5rem 0 3rem; border-bottom: 1px solid var(--color-border); }
.hero-inner { max-width: 820px; }
.eyebrow {
  display: inline-block; font-family: var(--font-mono); font-size: 0.76rem; font-weight: 500;
  letter-spacing: 0.06em; color: var(--color-primary-dark); background: var(--color-primary-tint);
  padding: 0.3rem 0.7rem; border-radius: 999px; margin-bottom: 1.2rem;
}
.hero h1 { font-size: clamp(1.9rem, 4vw, 2.7rem); font-weight: 800; line-height: 1.12; letter-spacing: -0.015em; margin-bottom: 1rem; }

/* --- Pipeline --- */

.pipeline { padding: 3.5rem 0; border-bottom: 1px solid var(--color-border); }
.pipeline-diagram {
  display: flex; align-items: center; flex-wrap: wrap; gap: 0.75rem;
  margin: 2rem 0 1.5rem; padding: 1.75rem; background: var(--color-surface);
  border: 1px solid var(--color-border); border-radius: var(--radius); box-shadow: var(--shadow-1);
}
.pipeline-node {
  font-family: var(--font-display); font-weight: 700; font-size: 0.92rem;
  padding: 0.7rem 1.1rem; border-radius: var(--radius-sm); border: 1.5px solid var(--color-border);
  background: var(--color-bg); color: var(--color-text);
}
.pipeline-node.core { border-color: var(--color-primary); color: var(--color-primary-dark); background: var(--color-primary-tint); }
.pipeline-node.result { border-color: var(--color-verified); color: var(--color-verified); background: var(--color-verified-tint); }
.pipeline-node.runtime { background: var(--ink); color: var(--text-on-ink); border-color: var(--ink); }
.pipeline-plus, .pipeline-arrow { font-family: var(--font-mono); color: var(--color-muted); font-size: 1.1rem; flex: none; }
.pipeline-caption { max-width: 780px; color: var(--color-muted); font-size: 0.97rem; }

/* --- Explorer --- */

.explorer { padding: 3.5rem 0; border-bottom: 1px solid var(--color-border); }
.explorer-shell {
  display: grid; grid-template-columns: minmax(220px, 300px) minmax(0, 1fr);
  gap: 1.5rem; margin-top: 2rem; align-items: start;
}
@media (max-width: 780px) { .explorer-shell { grid-template-columns: 1fr; } }

.explorer-list { display: flex; flex-direction: column; gap: 1.25rem; position: sticky; top: 5.5rem; }
.explorer-tier { display: flex; flex-direction: column; gap: 0.4rem; }
.explorer-tier-label { font-family: var(--font-mono); font-size: 0.7rem; font-weight: 500; letter-spacing: 0.07em; text-transform: uppercase; color: var(--color-muted); margin-bottom: 0.2rem; }

.explorer-card {
  display: flex; flex-direction: column; align-items: flex-start; gap: 0.15rem;
  width: 100%; text-align: left; background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-sm); padding: 0.7rem 0.9rem; cursor: pointer; font: inherit;
  transition: border-color 0.12s ease, box-shadow 0.12s ease;
}
.explorer-card:hover { border-color: var(--color-primary); box-shadow: var(--shadow-1); }
.explorer-card.is-selected { border-color: var(--color-primary); background: var(--color-primary-tint); box-shadow: var(--shadow-1); }
.explorer-card-title { font-family: var(--font-display); font-weight: 700; font-size: 0.94rem; color: var(--color-text); }
.explorer-card-tagline { font-size: 0.8rem; color: var(--color-muted); line-height: 1.35; }

.explorer-detail {
  background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius);
  box-shadow: var(--shadow-1); padding: 1.75rem 2rem; min-height: 300px;
}
.detail-tier {
  display: inline-block; font-family: var(--font-mono); font-size: 0.7rem; font-weight: 500;
  letter-spacing: 0.05em; text-transform: uppercase; padding: 0.2rem 0.6rem; border-radius: 999px; margin-bottom: 0.75rem;
}
.detail-tier.tier-core { color: var(--color-primary-dark); background: var(--color-primary-tint); }
.detail-tier.tier-supporting { color: var(--color-verified); background: var(--color-verified-tint); }
.detail-head h3 { font-size: 1.4rem; margin-bottom: 0.4rem; }
.detail-fields { margin: 1.5rem 0; }

.field-table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
.field-table th { text-align: left; font-family: var(--font-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--color-muted); padding: 0.4rem 0.6rem; border-bottom: 1px solid var(--color-border); }
.field-table td { padding: 0.5rem 0.6rem; border-bottom: 1px solid var(--color-border-soft); }
.field-table code { font-size: 0.85rem; }
.field-type { font-family: var(--font-mono); font-size: 0.82rem; color: var(--color-muted); }

.badge { display: inline-flex; align-items: center; font-family: var(--font-mono); font-size: 0.68rem; font-weight: 500; padding: 0.15rem 0.5rem; border-radius: 999px; text-transform: uppercase; letter-spacing: 0.04em; }
.badge.required { color: var(--color-primary-dark); background: var(--color-primary-tint); }
.badge.optional { color: var(--color-muted); background: var(--color-border-soft); }

.detail-example h4 { margin-top: 1.5rem; }

/* --- Code panels (shared with spurstore.com styling) --- */

.code-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.25rem; margin-top: 1.5rem; }
.code-panel { background: var(--ink); border-radius: var(--radius); overflow: hidden; border: 1px solid var(--ink-line); box-shadow: var(--shadow-2); }
.code-panel-head { display: flex; align-items: center; gap: 0.65rem; padding: 0.6rem 0.9rem; background: var(--ink-raised); border-bottom: 1px solid var(--ink-line); }
.code-tag { font-family: var(--font-mono); font-size: 0.66rem; font-weight: 500; letter-spacing: 0.06em; color: var(--accent); background: rgba(96, 165, 250, 0.16); border: 1px solid rgba(96, 165, 250, 0.34); padding: 0.12rem 0.45rem; border-radius: 5px; flex: none; }
.code-filename { font-size: 0.76rem; color: var(--text-on-ink-soft); font-family: var(--font-mono); }
.code-block { margin: 0; padding: 1.1rem 1.2rem; overflow-x: auto; font-family: var(--font-mono); font-size: 0.8rem; line-height: 1.65; color: var(--text-on-ink); }
.tok-key { color: var(--accent); }
.tok-str { color: #5eead4; }
.tok-bool { color: #a5b4fc; }
.tok-comment { color: var(--text-on-ink-soft); font-style: italic; }
.code-caption { margin-top: 1.25rem; }

/* --- Getting started --- */

.getting-started { padding: 3.5rem 0; border-bottom: 1px solid var(--color-border); }

/* --- Ecosystem --- */

.ecosystem { padding: 3.5rem 0; }
.ecosystem-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1.25rem; margin-top: 1.5rem; }
.ecosystem-card {
  display: block; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius);
  padding: 1.5rem 1.6rem; box-shadow: var(--shadow-1); transition: transform 0.14s ease, box-shadow 0.14s ease, border-color 0.14s ease;
}
.ecosystem-card:hover { border-color: var(--color-primary); box-shadow: var(--shadow-2); transform: translateY(-2px); text-decoration: none; }
.ecosystem-kicker { font-family: var(--font-mono); font-size: 0.72rem; font-weight: 500; letter-spacing: 0.06em; text-transform: uppercase; color: var(--color-primary); }
.ecosystem-card h3 { margin: 0.4rem 0 0.4rem; color: var(--color-text); }

/* --- Footer --- */

.site-footer { border-top: 1px solid var(--color-border); background: var(--color-surface); padding: 3rem 0 2rem; color: var(--color-muted); font-size: 0.9rem; }
.footer-grid { display: grid; grid-template-columns: minmax(0, 2fr) repeat(2, minmax(0, 1fr)); gap: 2.5rem; padding-bottom: 2rem; }
@media (max-width: 640px) { .footer-grid { grid-template-columns: 1fr; gap: 1.75rem; } }
.footer-brand .brand { margin-bottom: 0.8rem; }
.footer-brand .brand-mark { width: 22px; height: 22px; }
.footer-tagline { max-width: 300px; font-size: 0.88rem; line-height: 1.5; margin: 0; }
.footer-col { display: flex; flex-direction: column; gap: 0.55rem; }
.footer-col a { color: var(--color-muted); font-size: 0.88rem; }
.footer-col a:hover { color: var(--color-primary-dark); }
.footer-bottom { border-top: 1px solid var(--color-border-soft); padding-top: 1.25rem; font-size: 0.8rem; line-height: 1.6; }