/* SparkGuide documentation site — shared styles.
   Deliberately dependency-free (no CSS framework), matching the library's
   own zero-dependency philosophy. */

:root {
  --sg-primary: #4f46e5;
  --sg-primary-dark: #4338ca;
  --sg-primary-light: #eef2ff;
  --sg-text: #1f2933;
  --sg-text-muted: #5b6472;
  --sg-bg: #ffffff;
  --sg-bg-alt: #f6f7fb;
  --sg-border: #e5e7eb;
  --sg-code-bg: #0f172a;
  --sg-code-text: #e2e8f0;
  --sg-radius: 12px;
  --sg-max-width: 1120px;
  --sg-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --sg-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --sg-primary: #818cf8;
    --sg-primary-dark: #a5b4fc;
    --sg-primary-light: #1e1b4b;
    --sg-text: #e5e7eb;
    --sg-text-muted: #9aa4b2;
    --sg-bg: #0b0f19;
    --sg-bg-alt: #111827;
    --sg-border: #1f2937;
    --sg-code-bg: #060a13;
    --sg-code-text: #e2e8f0;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--sg-font);
  color: var(--sg-text);
  background: var(--sg-bg);
  line-height: 1.6;
}
a { color: var(--sg-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; }
code, pre { font-family: var(--sg-mono); }
code {
  background: var(--sg-bg-alt);
  border: 1px solid var(--sg-border);
  border-radius: 5px;
  padding: 1px 6px;
  font-size: .9em;
}
pre {
  background: var(--sg-code-bg);
  color: var(--sg-code-text);
  border-radius: var(--sg-radius);
  padding: 18px 20px;
  overflow-x: auto;
  font-size: 13.5px;
  line-height: 1.6;
}
pre code { background: none; border: none; padding: 0; color: inherit; }

.container { max-width: var(--sg-max-width); margin: 0 auto; padding: 0 24px; }

/* ---- header / nav ---- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--sg-bg) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--sg-border);
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; padding: 14px 24px; gap: 20px; }
.brand { display: flex; align-items: center; gap: 8px; font-weight: 800; font-size: 18px; color: var(--sg-text); }
.brand .dot { color: var(--sg-primary); }
.brand:hover { text-decoration: none; }
.site-nav { display: flex; align-items: center; gap: 22px; font-size: 14.5px; font-weight: 600; flex-wrap: wrap; }
.site-nav a { color: var(--sg-text-muted); }
.site-nav a:hover, .site-nav a.active { color: var(--sg-primary); text-decoration: none; }
.site-nav .btn { color: #fff; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--sg-primary); color: #fff !important; border: none;
  padding: 10px 18px; border-radius: 8px; font-weight: 700; font-size: 14.5px;
  cursor: pointer; transition: background .15s;
}
.btn:hover { background: var(--sg-primary-dark); text-decoration: none; }
.btn-outline {
  background: transparent; color: var(--sg-primary) !important;
  border: 1.5px solid var(--sg-primary);
}
.btn-outline:hover { background: var(--sg-primary-light); }
.btn-row { display: flex; gap: 12px; flex-wrap: wrap; }

/* ---- hero ---- */
.hero { padding: 72px 0 56px; text-align: center; }
.hero .eyebrow {
  display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: .04em;
  text-transform: uppercase; color: var(--sg-primary); background: var(--sg-primary-light);
  padding: 6px 14px; border-radius: 999px; margin-bottom: 20px;
}
.hero h1 { font-size: clamp(32px, 5vw, 52px); line-height: 1.1; margin: 0 0 18px; letter-spacing: -0.02em; }
.hero p.lead { font-size: 19px; color: var(--sg-text-muted); max-width: 640px; margin: 0 auto 30px; }
.hero .btn-row { justify-content: center; margin-bottom: 18px; }
.hero .meta-line { font-size: 13.5px; color: var(--sg-text-muted); }
.hero .meta-line code { margin: 0 3px; }

/* ---- sections / cards ---- */
section { padding: 56px 0; }
section.alt { background: var(--sg-bg-alt); }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 40px; }
.section-head h2 { font-size: 30px; margin: 0 0 10px; letter-spacing: -0.01em; }
.section-head p { color: var(--sg-text-muted); margin: 0; }

.grid { display: grid; gap: 20px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 860px) { .grid-3, .grid-2 { grid-template-columns: 1fr; } }

.card {
  background: var(--sg-bg); border: 1px solid var(--sg-border); border-radius: var(--sg-radius);
  padding: 26px; text-align: left;
}
.card .icon { font-size: 26px; margin-bottom: 12px; display: block; }
.card h3 { margin: 0 0 8px; font-size: 17px; }
.card p { margin: 0; color: var(--sg-text-muted); font-size: 14.5px; }

/* ---- footer ---- */
.site-footer { border-top: 1px solid var(--sg-border); padding: 40px 0; color: var(--sg-text-muted); font-size: 13.5px; }
.site-footer .container { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.site-footer a { color: var(--sg-text-muted); }
.site-footer a:hover { color: var(--sg-primary); }
.footer-links { display: flex; gap: 18px; flex-wrap: wrap; }

/* ---- docs layout (getting-started / guide / api) ---- */
.docs-layout { display: grid; grid-template-columns: 240px 1fr; gap: 48px; padding: 40px 0 80px; align-items: start; }
@media (max-width: 900px) { .docs-layout { grid-template-columns: 1fr; } }

.docs-sidebar { position: sticky; top: 84px; font-size: 14px; max-height: calc(100vh - 100px); overflow-y: auto; }
.docs-sidebar .group-title { font-size: 11.5px; text-transform: uppercase; letter-spacing: .06em; color: var(--sg-text-muted); margin: 18px 0 8px; }
.docs-sidebar .group-title:first-child { margin-top: 0; }
.docs-sidebar ul { list-style: none; margin: 0; padding: 0; }
.docs-sidebar li a {
  display: block; padding: 6px 10px; border-radius: 6px; color: var(--sg-text-muted);
  border-left: 2px solid transparent;
}
.docs-sidebar li a:hover { color: var(--sg-primary); text-decoration: none; background: var(--sg-bg-alt); }
.docs-sidebar li a.active { color: var(--sg-primary); border-left-color: var(--sg-primary); font-weight: 700; background: var(--sg-primary-light); }

.docs-content h1 { font-size: 34px; margin: 0 0 12px; letter-spacing: -0.01em; }
.docs-content > .lede { font-size: 17px; color: var(--sg-text-muted); margin: 0 0 40px; }
.docs-content h2 {
  font-size: 24px; margin: 48px 0 16px; padding-top: 8px; border-top: 1px solid var(--sg-border);
  scroll-margin-top: 90px;
}
.docs-content h2:first-of-type { border-top: none; margin-top: 0; }
.docs-content h3 { font-size: 18px; margin: 28px 0 10px; scroll-margin-top: 90px; }
.docs-content p { color: var(--sg-text); }
.docs-content > p, .docs-content li { color: var(--sg-text); }
.docs-content ul, .docs-content ol { padding-left: 22px; }
.docs-content pre { margin: 16px 0; }
.docs-content table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 14px; }
.docs-content th, .docs-content td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--sg-border); vertical-align: top; }
.docs-content th { color: var(--sg-text-muted); font-size: 12.5px; text-transform: uppercase; letter-spacing: .04em; }
.docs-content .callout {
  background: var(--sg-primary-light); border: 1px solid color-mix(in srgb, var(--sg-primary) 30%, transparent);
  border-radius: var(--sg-radius); padding: 16px 18px; font-size: 14.5px; margin: 20px 0;
}
.docs-content .callout strong { color: var(--sg-primary-dark); }

.badge-row { display: flex; gap: 8px; flex-wrap: wrap; margin: 18px 0; }
.pill {
  font-size: 12px; font-weight: 700; padding: 4px 11px; border-radius: 999px;
  background: var(--sg-bg-alt); border: 1px solid var(--sg-border); color: var(--sg-text-muted);
}

/* ---- demo page ---- */
.demo-frame-wrap {
  border: 1px solid var(--sg-border); border-radius: var(--sg-radius); overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,.08);
}
.demo-frame-wrap iframe { display: block; width: 100%; height: 780px; border: none; background: #f5f6fa; }
.demo-toolbar {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 10px 14px; background: var(--sg-bg-alt); border-bottom: 1px solid var(--sg-border); font-size: 13px;
}
.demo-toolbar .dots { display: flex; gap: 6px; }
.demo-toolbar .dots span { width: 10px; height: 10px; border-radius: 50%; background: var(--sg-border); }

@media (max-width: 640px) {
  .site-header .container { flex-direction: column; align-items: flex-start; gap: 10px; }
  .site-nav { gap: 14px; }
  .demo-frame-wrap iframe { height: 560px; }
}