/* FreeCoder — shared design system (landing + docs + blog) */

:root {
  --bg: #ffffff;
  --bg-soft: #f7f6fb;
  --bg-dark: #0b0b12;
  --ink: #0d0d12;
  --ink-2: #3b3b46;
  --muted: #6b7280;
  --line: #ebe9f3;
  --line-2: #e4e4ee;
  --violet: #7c3aed;
  --violet-600: #6d28d9;
  --violet-050: #f3eeff;
  --violet-100: #e9e0ff;
  --good: #16a34a;
  --glow: rgba(124, 58, 237, .26);

  --display: "Space Grotesk", ui-sans-serif, system-ui, -apple-system, sans-serif;
  --body: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --r: 16px;
  --r-sm: 11px;
  --maxw: 1140px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--body);
  color: var(--ink);
  /* Subtle on-brand background: soft violet bloom from the top + a faint violet
     dot grid. Low-contrast so it reads as texture and never fights the content. */
  background-color: var(--bg);
  background-image:
    radial-gradient(58% 40% at 50% -6%, rgba(124, 58, 237, .10), transparent 72%),
    radial-gradient(45% 45% at 100% 100%, rgba(124, 58, 237, .06), transparent 70%),
    radial-gradient(circle at 1px 1px, rgba(109, 40, 217, .08) 1.1px, transparent 1.8px);
  background-size: auto, auto, 22px 22px;
  background-attachment: fixed, fixed, fixed;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
::selection { background: var(--violet-100); color: var(--violet-600); }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.section { padding: 88px 0; }
.section--soft { background: var(--bg-soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

/* type */
h1, h2, h3, h4 { font-family: var(--display); font-weight: 700; letter-spacing: -0.02em; line-height: 1.08; color: var(--ink); }
h2 { font-size: clamp(1.9rem, 3.4vw, 2.7rem); }
h3 { font-size: 1.3rem; letter-spacing: -0.01em; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 0.72rem; font-weight: 500; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--violet-600);
}
.eyebrow::before { content: ""; width: 18px; height: 1.5px; background: var(--violet); display: inline-block; }
.lead { color: var(--muted); font-size: 1.08rem; max-width: 46ch; }
.section-head { max-width: 640px; margin-bottom: 48px; }
.section-head h2 { margin-top: 14px; }
.section-head p { color: var(--muted); margin-top: 14px; font-size: 1.05rem; }

/* buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--body); font-weight: 600; font-size: 0.95rem;
  padding: 12px 20px; border-radius: 12px; border: 1px solid transparent; cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease, border-color .15s ease;
}
.btn svg { width: 17px; height: 17px; }
.btn-primary { background: var(--violet-600); color: #fff; box-shadow: 0 10px 26px -10px var(--glow); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 34px -12px var(--glow); background: var(--violet); }
.btn-ghost { background: #fff; color: var(--ink); border-color: var(--line-2); }
.btn-ghost:hover { border-color: #cfc8e6; transform: translateY(-2px); }

/* header / nav */
.site-header {
  position: sticky; top: 0; z-index: 60;
  background: rgba(255,255,255,.78); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 62px; }
.brand { display: inline-flex; align-items: center; gap: 9px; font-family: var(--display); font-weight: 700; font-size: 1.05rem; letter-spacing: -0.01em; }
.brand img { width: 26px; height: 26px; filter: drop-shadow(0 4px 10px var(--glow)); }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  font-size: 0.92rem; font-weight: 500; color: var(--ink-2); padding: 8px 12px; border-radius: 9px;
  transition: background .15s, color .15s;
}
.nav-links a:hover { color: var(--ink); background: var(--violet-050); }
.nav-links a.active { color: var(--violet-600); }
@media (max-width: 720px) { .nav-links .hide-sm { display: none; } }

/* cards / feature grid */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 24px;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: 0 22px 50px -28px rgba(20,16,40,.4); border-color: #ddd6f0; }
.card .ic {
  display: grid; place-items: center; width: 40px; height: 40px; border-radius: 11px;
  background: var(--violet-050); color: var(--violet-600); margin-bottom: 16px;
}
.card .ic svg { width: 20px; height: 20px; }
.card h3 { font-size: 1.08rem; }
.card p { color: var(--muted); font-size: 0.92rem; margin-top: 7px; line-height: 1.55; }
@media (max-width: 920px) { .cards { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .cards { grid-template-columns: 1fr; } }

/* terminal / code block */
.terminal-block {
  background: var(--bg-dark); border-radius: var(--r); overflow: hidden;
  box-shadow: 0 40px 90px -40px rgba(12,10,30,.7); border: 1px solid #1c1b29;
}
.terminal-bar { display: flex; align-items: center; gap: 7px; padding: 13px 16px; border-bottom: 1px solid #1a1928; }
.terminal-bar .dot { width: 11px; height: 11px; border-radius: 50%; background: #2a2940; }
.terminal-bar .ttl { margin-left: 8px; font-family: var(--mono); font-size: 0.74rem; color: #6b6a86; }
.terminal-body { padding: 20px 20px 22px; font-family: var(--mono); font-size: 0.86rem; line-height: 1.75; color: #c9c7e6; overflow-x: auto; }
.terminal-body .c-prompt { color: #7c8cff; }
.terminal-body .c-cmd { color: #e8e6ff; }
.terminal-body .c-dim { color: #6b6a86; }
.terminal-body .c-ok { color: #46d39a; }
.terminal-body .c-violet { color: #b794ff; }

/* compare strip */
.compare { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 14px 28px; }
.compare .vs { font-family: var(--mono); font-size: 0.8rem; color: var(--muted); }
.compare .name { font-family: var(--display); font-weight: 600; color: var(--ink-2); font-size: 1.05rem; opacity: .75; }
.compare .name.us { color: var(--violet-600); opacity: 1; }

/* footer */
.site-footer { background: var(--bg-dark); color: #b9b8cf; padding: 64px 0 40px; }
.site-footer a { color: #b9b8cf; transition: color .15s; }
.site-footer a:hover { color: #fff; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 36px; }
.footer-brand .brand { color: #fff; }
.footer-brand p { color: #7c7b97; font-size: 0.9rem; margin-top: 14px; max-width: 30ch; }
.footer-col h5 { font-family: var(--display); color: #fff; font-size: 0.82rem; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 14px; }
.footer-col a { display: block; font-size: 0.92rem; padding: 5px 0; }
.footer-bottom { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; justify-content: space-between; margin-top: 44px; padding-top: 22px; border-top: 1px solid #1c1b29; color: #6b6a86; font-size: 0.85rem; }
.footer-support { text-align: center; }
.footer-support a { color: #b9b8cf; }
.footer-support a:hover { color: #fff; text-decoration: underline; }
.footer-social { display: inline-flex; gap: 10px; }
.footer-social a { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 9px; background: #15141f; }
.footer-social a:hover { background: #221f33; }
.footer-social svg { width: 17px; height: 17px; }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; } }

/* docs + blog article */
.prose { max-width: 760px; }
.prose h1 { font-size: clamp(2rem, 4vw, 2.6rem); margin-bottom: 14px; }
.prose h2 { font-size: 1.6rem; margin: 40px 0 14px; }
.prose h3 { font-size: 1.2rem; margin: 28px 0 10px; }
.prose p { color: var(--ink-2); margin: 14px 0; }
.prose ul, .prose ol { margin: 14px 0 14px 22px; color: var(--ink-2); }
.prose li { margin: 7px 0; }
.prose a { color: var(--violet-600); font-weight: 500; text-decoration: underline; text-underline-offset: 2px; text-decoration-thickness: 1px; }
.prose a:hover { color: var(--violet); }
.prose code { font-family: var(--mono); font-size: 0.86em; background: var(--violet-050); color: var(--violet-600); padding: 2px 6px; border-radius: 6px; }
.prose pre { background: var(--bg-dark); color: #c9c7e6; font-family: var(--mono); font-size: 0.84rem; line-height: 1.7; padding: 18px 20px; border-radius: 12px; overflow-x: auto; margin: 18px 0; }
.prose pre code { background: none; color: inherit; padding: 0; }
.prose blockquote { border-left: 3px solid var(--violet); background: var(--violet-050); padding: 14px 18px; border-radius: 0 10px 10px 0; margin: 18px 0; color: var(--ink-2); }
.prose .callout { border: 1px solid var(--line); border-radius: 12px; padding: 16px 18px; margin: 18px 0; background: #fff; display: flex; gap: 12px; }
.prose .callout svg { flex: none; width: 20px; height: 20px; color: var(--violet-600); margin-top: 2px; }
/* guard: inline icons inside prose text must never render at replaced-element default size */
.prose li svg, .prose p svg, .prose td svg { width: 1.05em; height: 1.05em; vertical-align: -0.15em; flex: none; }
/* checklist bullets */
.prose ul.safe { list-style: none; margin-left: 0; }
.prose ul.safe > li { position: relative; padding-left: 30px; margin: 10px 0; }
.prose ul.safe > li::before { content: ""; position: absolute; left: 0; top: 3px; width: 18px; height: 18px; border-radius: 50%; background: var(--violet-050); }
.prose ul.safe > li::after { content: ""; position: absolute; left: 6px; top: 8px; width: 6px; height: 3px; border-left: 2px solid var(--violet-600); border-bottom: 2px solid var(--violet-600); transform: rotate(-45deg); }
.prose .faq { margin: 18px 0; }
.prose .faq > summary { cursor: pointer; font-family: var(--display); font-weight: 600; font-size: 1.02rem; padding: 12px 0; border-bottom: 1px solid var(--line); list-style: none; }
.prose .faq > summary::-webkit-details-marker { display: none; }
.prose .faq > summary::before { content: "+ "; color: var(--violet-600); font-weight: 700; }
.prose .faq[open] > summary::before { content: "– "; }
.prose .faq > p { padding: 4px 0 6px; }
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 36px 0; }
.prose table { width: 100%; border-collapse: collapse; margin: 22px 0; font-size: 0.94rem; display: block; overflow-x: auto; }
.prose table thead th { font-family: var(--display); font-size: 0.9rem; text-align: left; background: var(--violet-050); color: var(--ink); padding: 11px 14px; border-bottom: 2px solid var(--violet-100); white-space: nowrap; }
.prose table td { padding: 11px 14px; border-bottom: 1px solid var(--line); color: var(--ink-2); vertical-align: top; }
.prose table tbody tr:hover { background: #faf9ff; }
.prose table td:first-child { font-weight: 600; color: var(--ink); }
.prose table .yes { color: var(--good); font-weight: 600; }
.prose table .no { color: #b91c1c; }

/* docs shell with sidebar */
.docs-shell { display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: 56px; padding: 48px 0 80px; }
.docs-nav { position: sticky; top: 84px; align-self: start; max-height: calc(100vh - 100px); overflow-y: auto; }
.docs-nav .grp { font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); margin: 20px 0 8px; }
.docs-nav a { display: block; font-size: 0.92rem; color: var(--ink-2); padding: 6px 10px; border-radius: 8px; }
.docs-nav a:hover { background: var(--violet-050); color: var(--ink); }
.docs-nav a.active { background: var(--violet-050); color: var(--violet-600); font-weight: 600; }
@media (max-width: 860px) { .docs-shell { grid-template-columns: 1fr; gap: 8px; } .docs-nav { position: static; max-height: none; border-bottom: 1px solid var(--line); padding-bottom: 16px; margin-bottom: 8px; } }

/* index lists (docs/blog cards) */
.list-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.list-card { display: block; border: 1px solid var(--line); border-radius: var(--r); padding: 22px; background: #fff; transition: transform .16s, box-shadow .16s, border-color .16s; }
.list-card:hover { transform: translateY(-3px); border-color: #ddd6f0; box-shadow: 0 22px 50px -30px rgba(20,16,40,.4); }
.list-card .tag { font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--violet-600); }
.list-card h3 { margin: 8px 0 6px; font-size: 1.12rem; }
.list-card p { color: var(--muted); font-size: 0.92rem; }
@media (max-width: 640px) { .list-grid { grid-template-columns: 1fr; } }

/* a11y */
:focus-visible { outline: 2px solid var(--violet); outline-offset: 2px; border-radius: 4px; }
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; scroll-behavior: auto; } }