/* metaweave docs — light/dark theming is pure CSS:
   • default follows the OS (prefers-color-scheme)
   • the radio buttons in the header override it via :has() */

:root {
  color-scheme: light dark;
  --bg: #f5f6fb;
  --bg-soft: #eceef8;
  --ink: #15172e;
  --ink-soft: #4a4e6d;
  --line: #d5d8ea;
  --accent: #4536d0;
  --accent-ink: #ffffff;
  --thread: #0b7d70;
  --code-bg: #e6e8f6;
  --focus: #4536d0;
  --serif:  "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

@media (prefers-color-scheme: dark) {
  :root:not(:has(#theme-light:checked)) {
    --bg: #0f1226;
    --bg-soft: #171a35;
    --ink: #e9ebfb;
    --ink-soft: #a9aed0;
    --line: #2b2f56;
    --accent: #a99cff;
    --accent-ink: #0f1226;
    --thread: #4fd8c4;
    --code-bg: #1b1f3f;
    --focus: #a99cff;
  }
}

:root:has(#theme-dark:checked) {
  color-scheme: dark;
  --bg: #0f1226;
  --bg-soft: #171a35;
  --ink: #e9ebfb;
  --ink-soft: #a9aed0;
  --line: #2b2f56;
  --accent: #a99cff;
  --accent-ink: #0f1226;
  --thread: #4fd8c4;
  --code-bg: #1b1f3f;
  --focus: #a99cff;
}

:root:has(#theme-light:checked) { color-scheme: light; }

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 5rem; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-underline-offset: 0.2em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; border-radius: 4px; }

.skip {
  position: absolute; left: 1rem; top: -4rem; z-index: 20;
  background: var(--accent); color: var(--accent-ink);
  padding: 0.6rem 1rem; border-radius: 6px; text-decoration: none; font-weight: 600;
}
.skip:focus { top: 1rem; }

.wrap { max-width: 1200px; width: 100%; padding-inline: 16px; margin-inline: auto; }

/* ── header ─────────────────────────────────────────── */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.bar { display: flex; align-items: center; gap: 1.5rem; min-height: 3.75rem; }
.brand {
  display: inline-flex; align-items: center; gap: 0.6rem;
  font-weight: 800; font-size: 1.2rem; letter-spacing: -0.02em;
  color: var(--ink); text-decoration: none;
}
.brand svg { width: 1.7rem; height: 1.7rem; }
.nav { display: flex; gap: 1.25rem; margin-left: auto; }
.nav a { color: var(--ink-soft); text-decoration: none; font-weight: 500; font-size: 0.95rem; }
.nav a:hover { color: var(--ink); text-decoration: underline; }

.theme { border: 0; margin: 0; padding: 0; display: flex; border: 1px solid var(--line); border-radius: 999px; overflow: hidden; }
.theme legend { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
.theme input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.theme label {
  padding: 0.3rem 0.75rem; font-size: clamp(0.75rem, 2.5vw, 0.85rem); font-weight: 500; cursor: pointer;
  color: var(--ink-soft); user-select: none;
}
.theme label:hover { color: var(--ink); }
.theme input:checked + label { background: var(--accent); color: var(--accent-ink); }
.theme input:focus-visible + label { outline: 3px solid var(--focus); outline-offset: -3px; }

/* ── hero ───────────────────────────────────────────── */
.hero { padding: clamp(2.5rem, 7vw, 5.5rem) 0 clamp(2.5rem, 6vw, 4.5rem); }
.hero .wrap { display: grid; gap: 3rem; grid-template-columns: minmax(0, 1fr); align-items: center; }
@media (min-width: 62rem) { .hero .wrap { grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); gap: 4rem; } }

h1 {
  margin: 0 0 1.25rem;
  font-size: clamp(2.4rem, 5.4vw, 4.1rem);
  line-height: 1.04; letter-spacing: -0.035em; font-weight: 800;
  text-wrap: balance;
}
.lead { font-size: clamp(1.1rem, 2vw, 1.3rem); color: var(--ink-soft); max-width: 34rem; margin: 0 0 2rem; }
.cta { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.btn {
  display: inline-block; padding: 0.7rem 1.3rem; border-radius: 8px; font-weight: 600;
  text-decoration: none; border: 2px solid var(--accent);
}
.btn.primary { background: var(--accent); color: var(--accent-ink); }
.btn.primary:hover { filter: brightness(1.1); }
.btn.ghost { color: var(--accent); }
.btn.ghost:hover { background: var(--bg-soft); }

/* terminal — always dark, like a real one */
.term {
  background: #0c0e1f; color: #d9dcf3; border-radius: 14px;
  border: 1px solid #2b2f56; box-shadow: 0 30px 60px -30px rgba(20, 20, 70, 0.55);
  overflow: hidden; min-width: 0;
}
.term-bar { display: flex; align-items: center; gap: 0.45rem; padding: 0.7rem 1rem; background: #151833; border-bottom: 1px solid #2b2f56; }
.dot { width: 0.7rem; height: 0.7rem; border-radius: 50%; background: #3a3f73; }
.term-title { margin-left: 0.6rem; font: 0.8rem var(--mono); color: #9aa0cf; }
.term pre { margin: 0; padding: 1.1rem 1.25rem 1.3rem; overflow-x: auto; font: 0.78rem/1.55 var(--mono); tab-size: 2; }
.term .p { color: #7ee7d6; }
.term .d { color: #7f86b8; }
.term .b { font-weight: 700; color: #ffffff; }
.term .g { color: #5fe0a0; }
.term .r { color: #ff7a8a; }
.term .y { color: #f2c35b; }
.term .u { color: #7cb0ff; }
.term .c { color: #82e0ff; }
.term .m { color: #c3b8ff; font-weight: 700; }

/* ── sections ───────────────────────────────────────── */
section { padding: clamp(2.5rem, 6vw, 4.5rem) 0; border-top: 1px solid var(--line); }
h2 { margin: 0 0 1rem; font-size: clamp(1.7rem, 3.4vw, 2.4rem); line-height: 1.15; letter-spacing: -0.025em; font-weight: 800; }
h3 { margin: 2rem 0 0.5rem; font-size: 1.2rem; letter-spacing: -0.01em; }
p { margin: 0 0 1rem; max-width: 46rem; }
.muted { color: var(--ink-soft); }

.split { display: grid; gap: 2rem 4rem; }
@media (min-width: 56rem) { .split { grid-template-columns: minmax(0, 18rem) minmax(0, 1fr); } }
.split > :first-child h2 { position: sticky; top: 5.5rem; }

code, kbd { font-family: var(--mono); font-size: 0.88em; background: var(--code-bg); padding: 0.12em 0.4em; border-radius: 5px; }
pre.code {
  background: var(--code-bg); border: 1px solid var(--line); border-radius: 10px;
  padding: 1rem 1.2rem; overflow-x: auto; font: 0.88rem/1.6 var(--mono); margin: 0 0 1.25rem; max-width: 100%;
}
.pre-code-holder { overflow-x: auto; }
pre.code code { background: none; padding: 0; font-size: inherit; overflow-x: auto; width: 100%; }
pre.code .c { color: var(--ink-soft); }

.table-scroll { overflow-x: auto; margin: 0 0 1.5rem; }
table { border-collapse: collapse; width: 100%; font-size: 0.95rem; }
th, td { text-align: left; padding: 0.65rem 0.9rem 0.65rem 0; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-weight: 700; color: var(--ink); white-space: nowrap; }
td:first-child { white-space: nowrap; }

.why { display: grid; gap: 2rem; }
.why p { margin: 0; }
.why strong { display: block; font-size: 1.15rem; margin-bottom: 0.2rem; letter-spacing: -0.01em; }
@media (min-width: 56rem) { .why { grid-template-columns: repeat(3, 1fr); gap: 2.5rem; } }

/* check catalogue */
.cat { border-top: 1px solid var(--line); }
.cat:last-of-type { border-bottom: 1px solid var(--line); }
.cat summary {
  cursor: pointer; padding: 1rem 0; display: flex; gap: 1rem; align-items: baseline; list-style: none;
  font-weight: 700; font-size: 1.1rem;
}
.cat summary::-webkit-details-marker { display: none; }
.cat summary::before { content: "+"; font-family: var(--mono); color: var(--accent); width: 1rem; flex: none; }
.cat[open] summary::before { content: "−"; }
.cat summary .n { margin-left: auto; font: 500 0.85rem var(--mono); color: var(--ink-soft); }
.cat dl { margin: 0 0 1.25rem 2rem; display: grid; gap: 0.9rem; }
.cat dt { font: 500 0.85rem var(--mono); color: var(--thread); }
.cat dd { margin: 0.1rem 0 0; }
.cat dd small { display: block; color: var(--ink-soft); font-size: 0.9rem; }

footer { border-top: 1px solid var(--line); padding: 2.5rem 0 3.5rem; color: var(--ink-soft); font-size: 0.95rem; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 0.75rem 2rem; justify-content: space-between; }
footer p { margin: 0; }

@media (max-width: 40rem) {
  .nav { display: none; }
  .theme { margin-left: auto; }
  .cta { display: grid; text-align: center; }
}

@media (max-width: 400px) {
  .brand span {
    display: none;
  }
}

@media print {
  .site-header, .skip { display: none; }
}