:root {
  --ground: #f8f7f4;
  --surface: #f0eeea;
  --text: #1a1a1a;
  --muted: #6b6b6b;
  --faint: #999999;
  --border: #d4d1cb;
  --border-light: #e8e5df;
  --accent: oklch(45.7% 0.24 277.023);
  --accent-hover: oklch(38% 0.27 277.023);
  --serif: 'Instrument Serif', 'Times New Roman', serif;
  --sans: 'Geist', system-ui, -apple-system, sans-serif;
  --mono: 'Geist Mono', ui-monospace, 'SF Mono', monospace;
  --max-w: 920px;
  --pad-x: 32px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--sans);
  color: var(--text);
  background: var(--ground);
  font-size: 16px;
  line-height: 1.7;
}
a { color: var(--text); text-decoration: underline; text-decoration-color: var(--accent); text-underline-offset: 3px; }
a:hover { color: var(--accent); }
::selection { background: var(--accent); color: var(--ground); }

.w { max-width: var(--max-w); margin: 0 auto; padding: 0 var(--pad-x); }

nav.top {
  border-bottom: 1px solid var(--border-light);
  background: var(--ground);
}
nav.top .row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--text);
}
/* Same brand mark as landing index.html and the dashboard's
   InboxArrowMark — 12x2 + 7x2 bars inside a 16x16 framed box. */
.logo-mark {
  width: 30px; height: 30px;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none'><rect x='0.5' y='0.5' width='23' height='23' stroke='%233d27d7' stroke-width='0.5'/><rect x='5' y='9' width='14' height='2' fill='%233d27d7'/><rect x='5' y='13' width='8' height='2' fill='%23a78bfa'/></svg>");
  background-repeat: no-repeat;
  background-size: contain;
  background-position: center;
}
nav.top .links {
  display: flex;
  gap: 24px;
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}
nav.top .links a {
  text-decoration: none;
  color: var(--muted);
}
nav.top .links a:hover { color: var(--text); }

main {
  padding: 64px 0 96px;
}
.crumb {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--faint);
  margin-bottom: 16px;
}
h1 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(36px, 5vw, 56px);
  line-height: 1.05;
  letter-spacing: -0.01em;
  color: var(--text);
  margin-bottom: 16px;
}
.subtitle {
  font-size: 18px;
  color: var(--muted);
  max-width: 720px;
  margin-bottom: 48px;
}
h2 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 32px;
  line-height: 1.2;
  letter-spacing: -0.005em;
  margin: 56px 0 16px;
  padding-top: 24px;
  border-top: 1px solid var(--border-light);
}
h2:first-of-type { border-top: none; padding-top: 0; }
h3 {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 18px;
  line-height: 1.3;
  margin: 32px 0 12px;
}
p {
  margin-bottom: 16px;
  color: var(--text);
}
p.muted { color: var(--muted); }
ul, ol {
  margin: 0 0 16px 24px;
  padding: 0;
}
li { margin-bottom: 8px; }
ol li::marker { font-family: var(--mono); color: var(--accent); }
code {
  font-family: var(--mono);
  font-size: 13px;
  background: var(--surface);
  color: var(--text);
  padding: 2px 6px;
  word-break: break-word;
}
pre {
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.6;
  background: var(--text);
  color: var(--ground);
  padding: 20px 24px;
  margin-bottom: 24px;
  overflow-x: auto;
  white-space: pre;
}
pre code {
  background: transparent;
  color: inherit;
  padding: 0;
  font-size: inherit;
}
table {
  width: 100%;
  border: 1px solid var(--border);
  border-collapse: collapse;
  margin-bottom: 24px;
  font-size: 14px;
}
th {
  text-align: left;
  background: var(--surface);
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
}
td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-light);
  vertical-align: top;
}
td:first-child { font-family: var(--mono); font-size: 12px; }
tr:last-child td { border-bottom: none; }

blockquote {
  border-left: 2px solid var(--accent);
  padding: 4px 16px;
  margin: 24px 0;
  background: var(--surface);
  color: var(--text);
}
blockquote p:last-child { margin-bottom: 0; }

footer {
  padding: 48px 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border-top: 1px solid var(--border-light);
}
footer .row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}
footer a { text-decoration: none; color: var(--muted); }
footer a:hover { color: var(--text); }
footer .links { display: flex; gap: 24px; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 12px 20px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  text-decoration: none;
  margin-top: 8px;
}
.btn:hover { background: var(--surface); border-color: var(--muted); color: var(--text); }
.btn.primary { background: var(--accent); color: var(--ground); border-color: var(--accent); }
.btn.primary:hover { background: var(--accent-hover); color: var(--ground); }

/* Wraps wide tables so they horizontally scroll on small viewports
   instead of forcing the whole page to scroll. Use:
     <div class="table-scroll"><table>...</table></div>
   The shadow on the right edge hints "you can scroll". */
.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin-bottom: 24px;
  background:
    linear-gradient(to right, var(--ground), var(--ground)) left center / 20px 100% no-repeat,
    linear-gradient(to right, transparent, var(--ground)) right center / 20px 100% no-repeat,
    linear-gradient(to right, transparent, rgba(0, 0, 0, 0.08)) right center / 12px 100% no-repeat;
  background-attachment: local, local, scroll;
}
.table-scroll table { margin-bottom: 0; }

/* ── Mobile: ≤ 880px ─────────────────────────────────────────────── */
@media (max-width: 880px) {
  :root { --pad-x: 20px; }
  body { font-size: 15px; line-height: 1.65; }
  main { padding: 40px 0 64px; }
  nav.top .row { height: 56px; }
  nav.top .links {
    gap: 14px;
    flex-wrap: wrap;
    justify-content: flex-end;
    max-width: 60%;
  }
  nav.top .links a {
    padding: 10px 4px;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }
  h1 { font-size: clamp(30px, 7vw, 44px); }
  h2 { font-size: 26px; margin: 40px 0 14px; padding-top: 20px; }
  h3 { font-size: 17px; margin: 24px 0 10px; }
  .subtitle { font-size: 16px; margin-bottom: 32px; }
  pre {
    padding: 16px 18px;
    font-size: 12px;
  }
  table { font-size: 13px; }
  th, td { padding: 10px 12px; }
  .btn {
    padding: 12px 18px;
    min-height: 44px;
  }
  footer .row { padding: 0 var(--pad-x); }
}

/* ── Small phones: ≤ 520px ───────────────────────────────────────── */
@media (max-width: 520px) {
  :root { --pad-x: 16px; }
  body { font-size: 14.5px; }
  pre { font-size: 11.5px; padding: 14px 16px; }
  /* Allow long curl/URL lines to wrap rather than scroll horizontally. */
  pre, pre code { white-space: pre-wrap; word-break: break-all; }
  nav.top .links { font-size: 10.5px; gap: 10px; }
  footer { padding: 32px 0; }
  footer .links { gap: 14px; }
}