/* handson — DevOps hands-on documentation site */

:root {
  --bg: #fbfbfa;
  --bg-elev: #ffffff;
  --bg-sunk: #f2f2f0;
  --line: #e4e4e1;
  --line-strong: #d0d0cc;
  --ink: #1a1a19;
  --ink-2: #55554f;
  --ink-3: #86867e;
  --accent: #0b7285;
  --accent-soft: #e2f2f4;
  --on-accent: #ffffff;
  --ok: #1f8a5c;
  --warn: #b26a00;
  --danger: #c02b2b;

  --d-inbox: #b8860b;
  --d-install: #6b4dfa;
  --d-runbook: #1f7a4d;
  --d-troubleshoot: #c02b2b;
  --d-reference: #2563c9;
  --d-daily: #c2325f;
  --d-archive: #6b7280;

  --radius: 12px;
  --radius-lg: 16px;
  --shadow: 0 1px 2px rgb(0 0 0 / .05), 0 8px 24px -12px rgb(0 0 0 / .12);
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
          "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  --wrap: 1120px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101011;
    --bg-elev: #191919;
    --bg-sunk: #0b0b0c;
    --line: #2a2a2b;
    --line-strong: #3a3a3c;
    --ink: #ececea;
    --ink-2: #a8a8a2;
    --ink-3: #74746e;
    --accent: #4ec9d8;
    --accent-soft: #10333a;
    --on-accent: #06222a;
    --ok: #4ec98d;
    --warn: #e0a54a;
    --danger: #f0736f;

    --d-inbox: #d9a63c;
    --d-install: #9b86ff;
    --d-runbook: #4ec98d;
    --d-troubleshoot: #f0736f;
    --d-reference: #6fa4f5;
    --d-daily: #f0709a;
    --d-archive: #9aa2ae;
    --shadow: 0 1px 2px rgb(0 0 0 / .4), 0 8px 24px -12px rgb(0 0 0 / .7);
  }
}

:root[data-theme="light"] {
  --bg: #fbfbfa; --bg-elev: #fff; --bg-sunk: #f2f2f0;
  --line: #e4e4e1; --line-strong: #d0d0cc;
  --ink: #1a1a19; --ink-2: #55554f; --ink-3: #86867e;
  --accent: #0b7285; --accent-soft: #e2f2f4; --on-accent: #ffffff;
  --ok: #1f8a5c; --warn: #b26a00; --danger: #c02b2b;
  --d-inbox: #b8860b; --d-install: #6b4dfa; --d-runbook: #1f7a4d;
  --d-troubleshoot: #c02b2b; --d-reference: #2563c9; --d-daily: #c2325f; --d-archive: #6b7280;
  --shadow: 0 1px 2px rgb(0 0 0 / .05), 0 8px 24px -12px rgb(0 0 0 / .12);
}
:root[data-theme="dark"] {
  --bg: #101011; --bg-elev: #191919; --bg-sunk: #0b0b0c;
  --line: #2a2a2b; --line-strong: #3a3a3c;
  --ink: #ececea; --ink-2: #a8a8a2; --ink-3: #74746e;
  --accent: #4ec9d8; --accent-soft: #10333a; --on-accent: #06222a;
  --ok: #4ec98d; --warn: #e0a54a; --danger: #f0736f;
  --d-inbox: #d9a63c; --d-install: #9b86ff; --d-runbook: #4ec98d;
  --d-troubleshoot: #f0736f; --d-reference: #6fa4f5; --d-daily: #f0709a; --d-archive: #9aa2ae;
  --shadow: 0 1px 2px rgb(0 0 0 / .4), 0 8px 24px -12px rgb(0 0 0 / .7);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: var(--font); font-size: 15px; line-height: 1.65;
  -webkit-font-smoothing: antialiased; overflow-x: hidden;
  display: flex; flex-direction: column; min-height: 100vh;
}
a { color: inherit; text-decoration: none; }
svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
kbd {
  font-family: var(--mono); font-size: 11px; padding: 1px 5px;
  border: 1px solid var(--line-strong); border-radius: 5px; color: var(--ink-3);
  background: var(--bg-sunk);
}
code { font-family: var(--mono); font-size: .89em; background: var(--bg-sunk); padding: .1em .38em; border-radius: 5px; }

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--accent); color: var(--on-accent); padding: 10px 16px; border-radius: 0 0 8px 0;
}
.skip:focus { left: 0; }

/* ---------- topbar ---------- */

.topbar {
  position: sticky; top: 0; z-index: 40;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.topbar-in {
  max-width: var(--wrap); margin: 0 auto; padding: 10px 20px;
  display: flex; align-items: center; gap: 16px;
}
.brand { display: flex; align-items: center; gap: 10px; min-width: 0; }
.brand-mark { font-size: 22px; line-height: 1; }
.brand-text { display: flex; flex-direction: column; line-height: 1.25; min-width: 0; }
.brand-text strong { font-size: 15px; letter-spacing: -.01em; }
/* The tagline is a full sentence — cap it so it never pushes the nav or the actions off the bar. */
.brand-text small {
  font-size: 11.5px; color: var(--ink-3);
  max-width: 34ch; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
@media (max-width: 1080px) { .brand-text small { display: none; } }

.nav { display: flex; gap: 2px; margin-left: auto; }
.nav a {
  padding: 6px 13px; border-radius: 999px; font-size: 13.5px; color: var(--ink-2);
  white-space: nowrap; transition: background .15s, color .15s;
}
.nav a:hover { background: var(--bg-sunk); color: var(--ink); }
.nav a.active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }

.topbar-actions { display: flex; align-items: center; gap: 8px; }
.btn-ghost, .btn-primary {
  display: inline-flex; align-items: center; gap: 7px; cursor: pointer;
  border-radius: 9px; font: inherit; font-size: 13px; padding: 7px 12px;
  border: 1px solid var(--line); background: var(--bg-elev); color: var(--ink-2);
  transition: border-color .15s, color .15s, background .15s;
}
.btn-ghost:hover { border-color: var(--line-strong); color: var(--ink); }
.btn-ghost.icon { padding: 7px 9px; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--on-accent); font-weight: 600; }
.btn-primary:hover { filter: brightness(1.08); }

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

.main { flex: 1; max-width: var(--wrap); width: 100%; margin: 0 auto; padding: 28px 20px 64px; }
.loading { padding: 80px 0; text-align: center; color: var(--ink-3); }

.section-head { display: flex; align-items: baseline; gap: 12px; margin: 34px 0 14px; }
.section-head:first-child { margin-top: 0; }
.section-head h2 { font-size: 15px; margin: 0; letter-spacing: -.01em; }
.section-head .hint { font-size: 12.5px; color: var(--ink-3); }
.section-head .spacer { flex: 1; }
.section-head a.more { font-size: 12.5px; color: var(--accent); }

.page-head { margin-bottom: 22px; }
.page-head h1 { font-size: 24px; margin: 0 0 4px; letter-spacing: -.02em; }
.page-head p { margin: 0; color: var(--ink-3); font-size: 13.5px; }

/* ---------- stat tiles ---------- */

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(132px, 1fr)); gap: 10px; }
.stat {
  background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 14px 15px;
}
.stat .n { font-size: 25px; font-weight: 650; letter-spacing: -.03em; line-height: 1.15; font-variant-numeric: tabular-nums; }
.stat .l { font-size: 12px; color: var(--ink-3); margin-top: 3px; }
.stat .sub { font-size: 11.5px; color: var(--ink-3); margin-top: 6px; }
.stat.accent .n { color: var(--accent); }
.stat.alert .n { color: var(--warn); }

/* ---------- heatmap ---------- */

.heat { display: grid; grid-auto-flow: column; grid-template-rows: repeat(7, 1fr); gap: 3px; overflow-x: auto; padding-bottom: 4px; }
.heat i, .heat-legend i {
  width: 12px; height: 12px; border-radius: 3px; background: var(--bg-sunk);
  border: 1px solid color-mix(in srgb, var(--line) 60%, transparent); display: block;
}
.heat i[data-c="1"], .heat-legend i[data-c="1"] { background: color-mix(in srgb, var(--accent) 30%, var(--bg-sunk)); }
.heat i[data-c="2"], .heat-legend i[data-c="2"] { background: color-mix(in srgb, var(--accent) 58%, var(--bg-sunk)); }
.heat i[data-c="3"], .heat-legend i[data-c="3"] { background: var(--accent); border-color: var(--accent); }
.heat-legend { display: flex; align-items: center; gap: 4px; font-size: 11.5px; color: var(--ink-3); margin-top: 10px; }
.heat-legend i:first-of-type { margin-left: 4px; }
.heat-legend i:last-of-type { margin-right: 4px; }

/* ---------- folder bars ---------- */

.folders { display: flex; flex-direction: column; gap: 9px; }
.fold { display: grid; grid-template-columns: 108px 1fr 38px; align-items: center; gap: 12px; font-size: 13px; }
.fold .name { color: var(--ink-2); display: flex; align-items: center; gap: 7px; }
.fold .dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.fold .track { display: block; height: 7px; background: var(--bg-sunk); border-radius: 99px; overflow: hidden; }
.fold .fill { display: block; height: 100%; min-width: 2px; border-radius: 99px; }
.fold .cnt { text-align: right; color: var(--ink-3); font-variant-numeric: tabular-nums; font-size: 12.5px; }

/* ---------- cards ---------- */

.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(288px, 1fr)); gap: 12px; }
.card {
  display: flex; flex-direction: column; gap: 8px;
  background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 15px 16px; transition: border-color .15s, transform .15s, box-shadow .15s;
}
.card:hover { border-color: var(--line-strong); transform: translateY(-1px); box-shadow: var(--shadow); }
.card-top { display: flex; align-items: center; gap: 8px; font-size: 11.5px; color: var(--ink-3); flex-wrap: wrap; }
.card h3 { margin: 0; font-size: 14.5px; line-height: 1.45; letter-spacing: -.01em; }
.card p { margin: 0; font-size: 13px; color: var(--ink-2); line-height: 1.6;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.card-foot { display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; padding-top: 4px; align-items: center; }

.pill {
  font-size: 11px; padding: 2px 8px; border-radius: 999px;
  border: 1px solid var(--line); color: var(--ink-3); background: var(--bg-sunk);
}
.pill.tag { cursor: pointer; }
.pill.tag:hover { border-color: var(--accent); color: var(--accent); }
.pill.stack {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: -.01em;
  color: var(--ink-2); background: var(--bg-elev); border-color: var(--line-strong);
}
.pill.stack:hover { border-color: var(--accent); color: var(--accent); }

.domain {
  font-size: 11px; font-weight: 600; letter-spacing: .01em;
  padding: 2px 8px; border-radius: 999px;
  background: color-mix(in srgb, var(--dc) 14%, transparent);
  color: var(--dc); border: 1px solid color-mix(in srgb, var(--dc) 30%, transparent);
}
.d-inbox { --dc: var(--d-inbox); } .d-install { --dc: var(--d-install); }
.d-runbook { --dc: var(--d-runbook); } .d-troubleshoot { --dc: var(--d-troubleshoot); }
.d-reference { --dc: var(--d-reference); } .d-daily { --dc: var(--d-daily); }
.d-archive { --dc: var(--d-archive); }

/* Risk and freshness badges — the two things you must see before opening a procedure */
.risk { font-size: 10.5px; font-weight: 600; padding: 1px 7px; border-radius: 999px; border: 1px solid; }
.risk.low { color: var(--ok); border-color: color-mix(in srgb, var(--ok) 40%, transparent); background: color-mix(in srgb, var(--ok) 10%, transparent); }
.risk.medium { color: var(--warn); border-color: color-mix(in srgb, var(--warn) 40%, transparent); background: color-mix(in srgb, var(--warn) 10%, transparent); }
.risk.high { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 40%, transparent); background: color-mix(in srgb, var(--danger) 10%, transparent); }
.verified { font-size: 11px; color: var(--ok); font-variant-numeric: tabular-nums; }
.verified.stale { color: var(--warn); }
.verified.none { color: var(--ink-3); }

/* ---------- filters ---------- */

.filters { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 18px; align-items: center; }
.chip {
  font-size: 12.5px; padding: 5px 12px; border-radius: 999px; cursor: pointer;
  border: 1px solid var(--line); background: var(--bg-elev); color: var(--ink-2); font-family: inherit;
}
.chip:hover { border-color: var(--line-strong); color: var(--ink); }
.chip[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: var(--on-accent); font-weight: 600; }
.filters input {
  flex: 1; min-width: 180px; font: inherit; font-size: 13px; padding: 6px 12px;
  border: 1px solid var(--line); border-radius: 999px; background: var(--bg-elev); color: var(--ink);
}
.filters input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }

/* ---------- tasks ---------- */

.tasklist { display: flex; flex-direction: column; gap: 2px; }
.task {
  display: flex; align-items: flex-start; gap: 11px; padding: 11px 14px;
  border: 1px solid var(--line); border-radius: 10px; background: var(--bg-elev);
  font-size: 13.5px; transition: border-color .15s;
}
.task:hover { border-color: var(--line-strong); }
.task .box {
  width: 15px; height: 15px; border: 1.6px solid var(--line-strong);
  border-radius: 4px; flex-shrink: 0; margin-top: 3px;
}
.task .body { flex: 1; min-width: 0; }
.task .meta { font-size: 11.5px; color: var(--ink-3); margin-top: 3px; display: flex; gap: 9px; flex-wrap: wrap; }
.task .due { font-variant-numeric: tabular-nums; font-weight: 600; }
.task .due.overdue { color: var(--danger); }
.task .due.soon { color: var(--warn); }

/* ---------- verification freshness list ---------- */

.freshlist { display: flex; flex-direction: column; gap: 2px; }
.fresh {
  display: flex; align-items: center; gap: 10px; padding: 9px 12px;
  border: 1px solid var(--line); border-radius: 10px; background: var(--bg-elev);
  font-size: 13px; transition: border-color .15s;
}
.fresh:hover { border-color: var(--line-strong); }
.fresh .t { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.fresh .age { font-size: 11.5px; font-variant-numeric: tabular-nums; white-space: nowrap; }

/* ---------- doc reader ---------- */

.reader { display: grid; grid-template-columns: minmax(0, 1fr) 244px; gap: 40px; align-items: start; }
.note-head { border-bottom: 1px solid var(--line); padding-bottom: 16px; margin-bottom: 22px; }
.note-head h1 { font-size: 27px; margin: 8px 0 8px; letter-spacing: -.025em; line-height: 1.3; }
.note-head .note-sum { color: var(--ink-2); font-size: 14.5px; margin: 0; }
.note-meta { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-top: 12px; }

/* Environment box — pins down where this actually ran, before the body starts */
.envbox {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 1px;
  background: var(--line); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; margin-top: 16px;
}
.envbox div { background: var(--bg-elev); padding: 10px 13px; }
.envbox dt { font-size: 10.5px; text-transform: uppercase; letter-spacing: .06em; color: var(--ink-3); margin: 0 0 3px; }
.envbox dd { margin: 0; font-size: 12.5px; color: var(--ink); font-family: var(--mono); line-height: 1.5; word-break: break-word; }

.prose { font-size: 15px; line-height: 1.78; }
.prose > :first-child { margin-top: 0; }
.prose h2 { font-size: 18px; margin: 34px 0 10px; letter-spacing: -.015em; padding-bottom: 6px; border-bottom: 1px solid var(--line); }
.prose h3 { font-size: 15.5px; margin: 26px 0 8px; }
.prose h4 { font-size: 14px; margin: 20px 0 6px; color: var(--ink-2); }
.prose p { margin: 0 0 14px; }
.prose a { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; text-decoration-thickness: 1px; }
.prose ul, .prose ol { padding-left: 22px; margin: 0 0 14px; }
.prose li { margin: 4px 0; }
.prose li::marker { color: var(--ink-3); }
.prose blockquote {
  margin: 16px 0; padding: 2px 0 2px 16px; border-left: 3px solid var(--accent);
  color: var(--ink-2); font-style: normal;
}
.prose pre {
  background: var(--bg-sunk); border: 1px solid var(--line); border-radius: 10px;
  padding: 14px 16px; overflow-x: auto; font-size: 12.5px; line-height: 1.62; margin: 0 0 16px;
}
.prose pre code { background: none; padding: 0; font-size: inherit; }
.prose table { width: 100%; border-collapse: collapse; font-size: 13.5px; margin: 0 0 16px; display: block; overflow-x: auto; }
.prose th, .prose td { border: 1px solid var(--line); padding: 8px 11px; text-align: left; vertical-align: top; }
.prose th { background: var(--bg-sunk); font-weight: 600; }
.prose td code { white-space: nowrap; }
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 28px 0; }
.prose input[type="checkbox"] { margin-right: 7px; accent-color: var(--accent); }
.prose .due { font-size: 11.5px; color: var(--warn); font-variant-numeric: tabular-nums; margin-left: 6px; }
.wikilink-missing { color: var(--ink-3); border-bottom: 1px dashed var(--line-strong); cursor: help; }

.aside { position: sticky; top: 74px; display: flex; flex-direction: column; gap: 22px; font-size: 13px; max-height: calc(100vh - 96px); overflow-y: auto; }
.aside h4 { font-size: 11.5px; text-transform: uppercase; letter-spacing: .07em; color: var(--ink-3); margin: 0 0 8px; font-weight: 600; }
.aside ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 5px; }
.aside li a { color: var(--ink-2); display: block; line-height: 1.45; }
.aside li a:hover { color: var(--accent); }
.aside .empty { color: var(--ink-3); font-size: 12.5px; }
.toc li a { font-size: 12.5px; }
.toc li.h3 { padding-left: 10px; }

/* ---------- graph ---------- */

.graph-wrap {
  position: relative; border: 1px solid var(--line); border-radius: var(--radius-lg);
  background: var(--bg-elev); overflow: hidden;
}
#graph { display: block; width: 100%; height: 560px; touch-action: none; cursor: grab; }
#graph:active { cursor: grabbing; }
.graph-legend {
  position: absolute; left: 14px; bottom: 14px; display: flex; flex-wrap: wrap; gap: 10px;
  background: color-mix(in srgb, var(--bg-elev) 90%, transparent); backdrop-filter: blur(8px);
  border: 1px solid var(--line); border-radius: 10px; padding: 8px 11px; font-size: 11.5px;
}
.graph-legend span { display: flex; align-items: center; gap: 5px; color: var(--ink-2); }
.graph-legend i { width: 8px; height: 8px; border-radius: 50%; }
.graph-hint { position: absolute; right: 14px; top: 14px; font-size: 11.5px; color: var(--ink-3); }

/* ---------- stacks & tags ---------- */

.tagcloud { display: flex; flex-wrap: wrap; gap: 8px; }
.tagcloud a {
  display: inline-flex; align-items: baseline; gap: 6px; padding: 6px 13px;
  border: 1px solid var(--line); border-radius: 999px; background: var(--bg-elev);
  transition: border-color .15s, color .15s;
}
.tagcloud a:hover { border-color: var(--accent); color: var(--accent); }
.tagcloud b { font-weight: 600; }
.tagcloud b.mono { font-family: var(--mono); font-size: .95em; }
.tagcloud small { color: var(--ink-3); font-variant-numeric: tabular-nums; }

/* ---------- palette ---------- */

.palette { position: fixed; inset: 0; z-index: 60; display: flex; align-items: flex-start; justify-content: center; }
.palette[hidden] { display: none; }
.palette-backdrop { position: absolute; inset: 0; background: rgb(0 0 0 / .42); backdrop-filter: blur(3px); }
.palette-box, .capture-box {
  position: relative; margin-top: 11vh; width: min(600px, 92vw);
  background: var(--bg-elev); border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg); box-shadow: 0 24px 60px -12px rgb(0 0 0 / .35); overflow: hidden;
}
#palette-input {
  width: 100%; border: 0; border-bottom: 1px solid var(--line); background: none; color: var(--ink);
  font: inherit; font-size: 16px; padding: 16px 18px; outline: none;
}
.palette-results { list-style: none; margin: 0; padding: 6px; max-height: 46vh; overflow-y: auto; }
.palette-results li a { display: block; padding: 9px 12px; border-radius: 9px; }
.palette-results li a:hover, .palette-results li.sel a { background: var(--bg-sunk); }
.palette-results .t { font-size: 13.5px; display: flex; align-items: center; gap: 8px; }
.palette-results .s { font-size: 11.5px; color: var(--ink-3); margin-top: 2px;
  display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden; }
.palette-results mark { background: color-mix(in srgb, var(--accent) 26%, transparent); color: inherit; border-radius: 3px; padding: 0 2px; }
.palette-foot { border-top: 1px solid var(--line); padding: 8px 14px; font-size: 11.5px; color: var(--ink-3); display: flex; gap: 6px; align-items: center; }
.palette-empty { padding: 26px 18px; text-align: center; color: var(--ink-3); font-size: 13px; }

/* ---------- capture sheet ---------- */

.capture-box { padding: 24px 26px 22px; }
.capture-box h2 { margin: 0 0 8px; font-size: 18px; letter-spacing: -.02em; }
.capture-lede { margin: 0 0 18px; font-size: 13px; color: var(--ink-2); line-height: 1.7; }
.capture-grid { display: grid; gap: 9px; }
.capture-grid a {
  display: flex; gap: 12px; align-items: flex-start; padding: 13px 15px;
  border: 1px solid var(--line); border-radius: 11px; transition: border-color .15s, background .15s;
}
.capture-grid a:hover { border-color: var(--accent); background: var(--accent-soft); }
.capture-grid .ico { font-size: 19px; line-height: 1.3; }
.capture-grid b { display: block; font-size: 13.5px; }
.capture-grid small { color: var(--ink-3); font-size: 12px; line-height: 1.55; }
.capture-note { font-size: 11.5px; color: var(--ink-3); margin: 16px 0 0; line-height: 1.6; }
.capture-close { margin-top: 14px; width: 100%; justify-content: center; }

/* ---------- misc ---------- */

.empty-state { padding: 56px 20px; text-align: center; color: var(--ink-3); font-size: 13.5px;
  border: 1px dashed var(--line-strong); border-radius: var(--radius-lg); }
.panel { background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; align-items: start; }
.back-link { display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; color: var(--ink-3); margin-bottom: 4px; }
.back-link:hover { color: var(--accent); }

.footer { border-top: 1px solid var(--line); margin-top: auto; }
.footer-in {
  max-width: var(--wrap); margin: 0 auto; padding: 18px 20px 28px;
  display: flex; flex-wrap: wrap; gap: 10px; justify-content: space-between;
  font-size: 12px; color: var(--ink-3);
}
.footer-meta { display: flex; gap: 14px; }
.footer a:hover { color: var(--accent); }

@media (max-width: 900px) {
  .reader { grid-template-columns: 1fr; gap: 26px; }
  .aside { position: static; max-height: none; border-top: 1px solid var(--line); padding-top: 20px; }
  .two-col { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .topbar-in { flex-wrap: wrap; padding: 10px 14px; gap: 10px; }
  .nav { order: 3; width: 100%; margin-left: 0; overflow-x: auto; padding-bottom: 2px; }
  .topbar-actions { margin-left: auto; }
  .brand-text small { display: none; }
  #search-open kbd { display: none; }
  .btn-primary { font-size: 12.5px; padding: 7px 11px; }
  .main { padding: 20px 14px 48px; }
  .note-head h1 { font-size: 22px; }
  #graph { height: 420px; }
  .fold { grid-template-columns: 84px 1fr 32px; gap: 9px; font-size: 12.5px; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}