/* nanocached docs — shared stylesheet.
   Light palette on :root; dark overrides via prefers-color-scheme. */

:root {
  --bg: #f5f8fb;
  --surface: #ffffff;
  --ink: #17222e;
  --muted: #5a6a7d;
  --faint: #8a97a8;
  --accent: #1e5fe0;
  --cyan: #0f9fd0;
  --border: #dbe3ee;
  --code-bg: #eef3f9;
  --code-ink: #24405c;
  --tile: #1a2029;      /* the logo's own ground — same in both themes */
  --tile-ink: #e8eef5;
  --warn-bg: #fff7e6;
  --warn-border: #e8c877;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
          Arial, "Hiragino Sans", "Noto Sans JP", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e141d;
    --surface: #151d29;
    --ink: #e7edf5;
    --muted: #97a6ba;
    --faint: #6b7a8e;
    --accent: #5ea3ff;
    --cyan: #35d4f5;
    --border: #24303f;
    --code-bg: #0b1017;
    --code-ink: #b9cce2;
    --warn-bg: #2a2410;
    --warn-border: #7a6528;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
}

/* ---------- header ---------- */

.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.site-header nav {
  max-width: 68rem;
  margin: 0 auto;
  padding: 0.7rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  color: var(--ink);
  font-size: 1.06rem;
  letter-spacing: 0.01em;
  margin-right: auto;
}

.brand img { width: 26px; height: 26px; display: block; }
.brand b { font-weight: 750; }
.brand span { font-weight: 350; color: var(--muted); }

.site-header .links {
  display: flex;
  gap: 0.25rem 1.1rem;
  flex-wrap: wrap;
}

.site-header .links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.92rem;
  padding: 0.15rem 0;
  border-bottom: 2px solid transparent;
}

.site-header .links a:hover { color: var(--ink); }
.site-header .links a[aria-current="page"] {
  color: var(--ink);
  border-bottom-color: var(--accent);
}

/* ---------- layout ---------- */

main {
  max-width: 47rem;
  margin: 0 auto;
  padding: 2.2rem 1.25rem 4rem;
}

main.wide { max-width: 68rem; }

h1 {
  font-size: 1.9rem;
  line-height: 1.25;
  letter-spacing: -0.015em;
  text-wrap: balance;
  margin: 0 0 0.4rem;
}

h2 {
  font-size: 1.28rem;
  letter-spacing: -0.01em;
  margin: 2.4rem 0 0.6rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--border);
}

h3 { font-size: 1.05rem; margin: 1.7rem 0 0.4rem; }

p, ul, ol { margin: 0.65rem 0; }
li { margin: 0.25rem 0; }

a { color: var(--accent); }

.lede { color: var(--muted); font-size: 1.05rem; margin-bottom: 1.6rem; }

hr { border: none; border-top: 1px solid var(--border); margin: 2rem 0; }

/* ---------- code ---------- */

code {
  font-family: var(--mono);
  font-size: 0.86em;
  background: var(--code-bg);
  color: var(--code-ink);
  padding: 0.12em 0.35em;
  border-radius: 4px;
}

pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.85rem 1rem;
  overflow-x: auto;
  line-height: 1.55;
  margin: 0.8rem 0;
}

pre code {
  background: none;
  padding: 0;
  font-size: 0.84rem;
  color: var(--code-ink);
}

/* ---------- tables ---------- */

.table-wrap { overflow-x: auto; margin: 0.8rem 0; }

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.92rem;
}

th, td {
  text-align: left;
  padding: 0.45rem 0.8rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

th { color: var(--muted); font-weight: 600; white-space: nowrap; }
td code { white-space: nowrap; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }

/* ---------- callouts ---------- */

.note {
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  background: var(--surface);
  border-radius: 6px;
  padding: 0.7rem 1rem;
  margin: 1rem 0;
  font-size: 0.94rem;
}

.warn {
  border: 1px solid var(--warn-border);
  border-left: 3px solid var(--warn-border);
  background: var(--warn-bg);
  border-radius: 6px;
  padding: 0.7rem 1rem;
  margin: 1rem 0;
  font-size: 0.94rem;
}

/* ---------- landing page ---------- */

.hero {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  padding: 2.2rem 0 1rem;
}

.hero .mark {
  flex: 0 0 auto;
  width: 200px;
  height: 200px;
  border-radius: 22px;
  overflow: hidden;
  background: var(--tile);
  box-shadow: 0 10px 34px rgba(20, 90, 200, 0.22);
}

.hero .mark img { width: 100%; height: 100%; display: block; }

.hero h1 {
  font-size: 2.5rem;
  margin: 0 0 0.6rem;
}

.hero h1 b { font-weight: 800; }
.hero h1 span { font-weight: 300; color: var(--muted); }

.hero .tagline {
  font-size: 1.12rem;
  color: var(--muted);
  max-width: 34rem;
  margin: 0 0 1.3rem;
}

.hero .actions { display: flex; gap: 0.7rem; flex-wrap: wrap; }

.button {
  display: inline-block;
  text-decoration: none;
  font-size: 0.95rem;
  padding: 0.5rem 1.1rem;
  border-radius: 8px;
  border: 1px solid var(--accent);
}

.button.primary { background: var(--accent); color: #fff; }
.button.ghost { color: var(--accent); }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 0.9rem;
  margin: 1.4rem 0;
}

.feature {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.95rem 1.1rem;
}

.feature h3 { margin: 0 0 0.3rem; font-size: 0.99rem; }
.feature p { margin: 0; font-size: 0.9rem; color: var(--muted); }

.lang-row {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin: 0.9rem 0;
}

.lang-row span {
  font-family: var(--mono);
  font-size: 0.82rem;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--muted);
  border-radius: 999px;
  padding: 0.22rem 0.75rem;
}

@media (max-width: 40rem) {
  .hero { flex-direction: column; align-items: flex-start; gap: 1.5rem; }
  .hero .mark { width: 132px; height: 132px; border-radius: 16px; }
  .hero h1 { font-size: 2rem; }
}

/* ---------- footer ---------- */

.site-footer {
  border-top: 1px solid var(--border);
  color: var(--faint);
  font-size: 0.85rem;
}

.site-footer div {
  max-width: 68rem;
  margin: 0 auto;
  padding: 1.1rem 1.25rem;
  display: flex;
  gap: 1.2rem;
  flex-wrap: wrap;
}

.site-footer a { color: var(--muted); }