:root {
  --bg: #f6f6fb;
  --surface: #ffffff;
  --surface-2: #eef0f7;
  --border: #e0e2ee;
  --ink: #171626;
  --ink-dim: #565575;
  --ink-faint: #8f8ea8;
  --accent: #6a3df5;
  --accent-ink: #ffffff;
  --accent-soft: #efe9ff;
  --host-accent: #f57a1a;
  --ok: #1a8c5c;
  --ok-soft: #e2f6ec;
  --warn: #b3790b;
  --warn-soft: #fdf1d8;
  --danger: #c22c4a;
  --danger-soft: #fbe6ea;
  --code-bg: #f0f0f8;
  --sidebar-w: 272px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f0d1e;
    --surface: #17152a;
    --surface-2: #1d1b34;
    --border: #2f2c4d;
    --ink: #f1f0fb;
    --ink-dim: #b3b1cc;
    --ink-faint: #7d7aa0;
    --accent: #9b7bff;
    --accent-ink: #16102e;
    --accent-soft: #291f4d;
    --host-accent: #ff9b4d;
    --ok: #4fd699;
    --ok-soft: #123526;
    --warn: #f0b649;
    --warn-soft: #3a2c0c;
    --danger: #ff6b8b;
    --danger-soft: #3a1520;
    --code-bg: #1d1b34;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
}

body {
  font-family: "IBM Plex Sans", -apple-system, "Segoe UI", sans-serif;
  font-size: 15px;
  line-height: 1.65;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

code, pre, .mono {
  font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, monospace;
}

code {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 1px 6px;
  font-size: 0.88em;
}

pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  overflow-x: auto;
}
pre code { background: none; border: none; padding: 0; }

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

.shell {
  display: flex;
  min-height: 100vh;
}

.topbar {
  display: none;
}

#sidebar {
  width: var(--sidebar-w);
  flex: none;
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 20px 16px 40px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 4px 8px 18px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 14px;
}

.brand .mark {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--host-accent));
  flex: none;
}

.brand .name {
  font-family: "Sora", sans-serif;
  font-weight: 700;
  font-size: 15px;
  line-height: 1.2;
}

.brand .sub {
  font-size: 11px;
  color: var(--ink-faint);
  font-family: "IBM Plex Mono", monospace;
}

.nav-group {
  margin-bottom: 4px;
}

.nav-group-label {
  font-family: "IBM Plex Mono", monospace;
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
  padding: 14px 8px 6px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 7px 8px;
  border-radius: 8px;
  color: var(--ink-dim);
  font-size: 13.5px;
  font-weight: 500;
}

.nav-link:hover {
  background: var(--surface-2);
  text-decoration: none;
  color: var(--ink);
}

.nav-link.active {
  background: var(--accent-soft);
  color: var(--accent);
}

.nav-link .ic {
  width: 16px;
  text-align: center;
  flex: none;
  opacity: 0.85;
}

main {
  flex: 1;
  min-width: 0;
  padding: 48px 56px 100px;
}

.content {
  max-width: 880px;
  margin: 0 auto;
}

.crumb {
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px;
  color: var(--ink-faint);
  margin-bottom: 10px;
}

.crumb a { color: var(--ink-faint); }

h1 {
  font-family: "Sora", sans-serif;
  font-size: 32px;
  font-weight: 700;
  margin: 0 0 8px;
  text-wrap: balance;
  letter-spacing: -0.01em;
}

.dek {
  color: var(--ink-dim);
  font-size: 16px;
  margin: 0 0 32px;
  max-width: 68ch;
}

h2 {
  font-family: "Sora", sans-serif;
  font-size: 21px;
  font-weight: 700;
  margin: 42px 0 14px;
  padding-top: 6px;
  scroll-margin-top: 20px;
}

h2:first-of-type { margin-top: 0; }

h3 {
  font-family: "Sora", sans-serif;
  font-size: 16.5px;
  font-weight: 600;
  margin: 26px 0 10px;
  scroll-margin-top: 20px;
}

p { margin: 0 0 14px; }
ul, ol { margin: 0 0 14px; padding-left: 22px; }
li { margin-bottom: 5px; }

table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 22px;
  font-size: 13.5px;
}

th, td {
  text-align: left;
  padding: 9px 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

th {
  font-family: "IBM Plex Mono", monospace;
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-faint);
  border-bottom: 2px solid var(--border);
}

tr:last-child td { border-bottom: none; }

.table-wrap { overflow-x: auto; margin-bottom: 22px; }
.table-wrap table { margin-bottom: 0; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px 22px;
  margin: 0 0 18px;
}

.card h3 { margin-top: 0; }

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 22px;
}

.badge {
  display: inline-flex;
  align-items: center;
  font-family: "IBM Plex Mono", monospace;
  font-size: 10.5px;
  letter-spacing: 0.03em;
  padding: 3px 9px;
  border-radius: 999px;
  white-space: nowrap;
}
.badge.ok { background: var(--ok-soft); color: var(--ok); }
.badge.warn { background: var(--warn-soft); color: var(--warn); }
.badge.danger { background: var(--danger-soft); color: var(--danger); }
.badge.shared { background: var(--accent-soft); color: var(--accent); }

.callout {
  border-radius: 12px;
  padding: 14px 18px;
  margin: 0 0 20px;
  display: flex;
  gap: 12px;
  font-size: 14px;
}
.callout .icon { flex: none; font-size: 16px; line-height: 1.4; }
.callout p { margin: 0; }
.callout.warn { background: var(--warn-soft); border: 1px solid color-mix(in srgb, var(--warn) 40%, transparent); }
.callout.info { background: var(--accent-soft); border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent); }
.callout.danger { background: var(--danger-soft); border: 1px solid color-mix(in srgb, var(--danger) 35%, transparent); }

.pillnav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 30px;
}
.pillnav a {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 13px;
  color: var(--ink-dim);
}
.pillnav a:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }

.next-prev {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 56px;
  padding-top: 22px;
  border-top: 1px solid var(--border);
}
.next-prev a {
  flex: 1;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
  color: var(--ink);
}
.next-prev a:hover { border-color: var(--accent); text-decoration: none; }
.next-prev .lbl { display: block; font-family: "IBM Plex Mono", monospace; font-size: 10.5px; color: var(--ink-faint); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 3px; }
.next-prev .to-prev { text-align: left; }
.next-prev .to-next { text-align: right; }

.copyf {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.copyf button {
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--ink-dim);
  border-radius: 6px;
  width: 24px;
  height: 24px;
  font-size: 11px;
  cursor: pointer;
}
.copyf button:hover { color: var(--accent); border-color: var(--accent); }
.copyf button.copied { color: var(--ok); border-color: var(--ok); }

@media (max-width: 900px) {
  :root { --sidebar-w: 240px; }
  main { padding: 36px 24px 80px; }
  .grid-2 { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .shell { flex-direction: column; }
  #sidebar {
    position: relative;
    width: 100%;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border);
    display: none;
  }
  #sidebar.open { display: block; }
  .topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    border-bottom: 1px solid var(--border);
    background: var(--surface);
    position: sticky;
    top: 0;
    z-index: 5;
  }
  .topbar .name { font-family: "Sora", sans-serif; font-weight: 700; font-size: 15px; }
  .topbar button {
    border: 1px solid var(--border);
    background: var(--surface-2);
    color: var(--ink);
    border-radius: 8px;
    padding: 6px 10px;
    font-size: 13px;
  }
  main { padding: 28px 18px 70px; }
  h1 { font-size: 26px; }
}