/* Plainsum hub. Same ledger-green-on-paper language as the two tools (tokens and base copied from the tool stylesheets). No inline styles: the CSP forbids them. */
:root {
  --bg: #f5f1e8; --surface: #fbf9f4; --sunk: #ede7da; --ink: #1e2521; --ink-2: #4a534d; --ink-3: #6a726b;
  --rule: #ddd5c6; --rule-strong: #b9b0a0; --accent: #23614a; --accent-hover: #1a4d3a; --accent-ink: #fff; --accent-soft: #dce7dd;
  --over: #a5432a; --over-soft: #f2ddd3; --warn: #7d5300; --warn-soft: #f5e7c4; --focus: #23614a;
  --shadow: 0 1px 0 rgba(30,37,33,.04), 0 10px 30px rgba(30,37,33,.08);
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", "URW Palladio L", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --gutter: 28px; --maxw: 1120px; --radius: 6px; color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #141816; --surface: #1b201d; --sunk: #101311; --ink: #ece7dc; --ink-2: #bdb9ae; --ink-3: #8f918a;
    --rule: #2d3430; --rule-strong: #47504a; --accent: #7cc3a0; --accent-hover: #95d3b3; --accent-ink: #0f1a14; --accent-soft: #1f3529;
    --over: #e88d6c; --over-soft: #3b251d; --warn: #e6b85c; --warn-soft: #3a2d12; --focus: #7cc3a0; --shadow: 0 10px 30px rgba(0,0,0,.45); color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #141816; --surface: #1b201d; --sunk: #101311; --ink: #ece7dc; --ink-2: #bdb9ae; --ink-3: #8f918a;
  --rule: #2d3430; --rule-strong: #47504a; --accent: #7cc3a0; --accent-hover: #95d3b3; --accent-ink: #0f1a14; --accent-soft: #1f3529;
  --over: #e88d6c; --over-soft: #3b251d; --warn: #e6b85c; --warn-soft: #3a2d12; --focus: #7cc3a0; --shadow: 0 10px 30px rgba(0,0,0,.45); color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.6 var(--sans); font-variant-numeric: tabular-nums; -webkit-font-smoothing: antialiased; overflow-x: hidden; }
h1, h2, h3 { font-family: var(--serif); font-weight: 600; letter-spacing: -.012em; margin: 0; line-height: 1.12; }
h1 { font-size: clamp(32px, 5.2vw, 52px); }
h2 { font-size: clamp(24px, 3.2vw, 32px); }
h3 { font-size: 20px; }
h1 em, h2 em { font-style: italic; color: var(--accent); font-weight: 600; }
p { margin: 0 0 14px; }
a { color: var(--accent); text-underline-offset: 3px; }
a:hover { color: var(--accent-hover); }
button, input, select, textarea { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }
[hidden] { display: none !important; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--gutter); }
.num { font-variant-numeric: tabular-nums lining-nums; text-align: right; white-space: nowrap; }
.muted { color: var(--ink-3); }
.small { font-size: 14px; }

/* ---------- header ---------- */
.site-head { border-bottom: 1px solid var(--rule); background: var(--bg); position: sticky; top: 0; z-index: 20; }
@media (max-width: 700px) { .site-head { position: static; } }
.site-head .wrap { display: flex; align-items: center; gap: 22px; min-height: 60px; flex-wrap: wrap; padding-top: 8px; padding-bottom: 8px; }
.brand { display: flex; align-items: baseline; gap: 10px; text-decoration: none; color: var(--ink); }
.brand:hover { color: var(--ink); }
.brand svg { width: 22px; height: 18px; color: var(--accent); align-self: center; flex: none; }
.brand b { font-family: var(--serif); font-size: 22px; font-weight: 700; letter-spacing: -.01em; }
.brand i { font-family: var(--serif); font-size: 22px; color: var(--ink-3); }
.site-head nav { display: flex; gap: 22px; margin-left: auto; align-items: center; flex-wrap: wrap; }
.site-head nav a { color: var(--ink-2); text-decoration: none; font-size: 15px; padding: 6px 0; border-bottom: 2px solid transparent; }
.site-head nav a:hover, .site-head nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--accent); }

/* ---------- buttons ---------- */
.btn { appearance: none; border: 1px solid var(--accent); background: var(--accent); color: var(--accent-ink); padding: 10px 18px; border-radius: var(--radius); cursor: pointer; font-weight: 600; font-size: 15px; line-height: 1.2; text-decoration: none; display: inline-flex; align-items: center; gap: 8px; }
.btn:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: var(--accent-ink); }
.btn.ghost { background: transparent; color: var(--accent); }
.btn.ghost:hover { background: var(--accent-soft); color: var(--accent-hover); }
.btn.small { padding: 7px 12px; font-size: 14px; }
.btn[disabled] { opacity: .5; cursor: not-allowed; }
.btn .lock { width: 13px; height: 13px; flex: none; }
.btn.pro-locked { border-style: dashed; }
.linkbtn { appearance: none; background: none; border: 0; padding: 0; color: var(--accent); text-decoration: underline; text-underline-offset: 3px; cursor: pointer; font-size: inherit; }

.hero { padding: 30px 0 20px; }
.hero .kicker { font-family: var(--serif); font-style: italic; color: var(--ink-3); font-size: 17px; margin-bottom: 6px; }
.hero h1 { max-width: 24ch; font-size: clamp(30px, 4.6vw, 46px); }
.hero .lede { font-size: 18px; color: var(--ink-2); max-width: 66ch; margin: 12px 0 0; }
.trust { display: flex; gap: 10px 22px; flex-wrap: wrap; margin: 14px 0 0; padding: 0; list-style: none; font-size: 14.5px; color: var(--ink-2); }
.trust li { display: flex; gap: 8px; align-items: center; }
.trust svg { width: 16px; height: 16px; color: var(--accent); flex: none; }

/* ---------- tool ---------- */
/* ---------- content sections ---------- */
section.block { padding: 56px 0 8px; }
section.block > .wrap > h2 { margin-bottom: 18px; }
.prose { max-width: 70ch; }
.wrap.prose { max-width: var(--maxw); }
.wrap.prose > * { max-width: 70ch; }
.prose p, .prose li { color: var(--ink-2); }
.prose h3 { margin: 28px 0 10px; }
.prose ul, .prose ol { padding-left: 22px; margin: 0 0 16px; }
.prose li { margin: 6px 0; }
.cols-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card { background: var(--surface); border: 1px solid var(--rule); border-radius: 8px; padding: 20px; }
.card h3 { margin-bottom: 8px; }
.card p { margin: 0; color: var(--ink-2); font-size: 15px; }
.step-no { font-family: var(--serif); font-style: italic; font-size: 34px; color: var(--accent); line-height: 1; display: block; margin-bottom: 6px; }
.example { border: 1px solid var(--rule-strong); border-radius: 8px; overflow: hidden; background: var(--surface); }
.related { display: flex; gap: 10px; flex-wrap: wrap; }
.related a { border: 1px solid var(--rule-strong); border-radius: 999px; padding: 7px 14px; text-decoration: none; color: var(--ink); font-size: 14.5px; background: var(--surface); }
.related a:hover { border-color: var(--accent); color: var(--accent); }
.callout { border-left: 4px solid var(--accent); background: var(--accent-soft); padding: 14px 18px; border-radius: 0 8px 8px 0; margin: 18px 0; max-width: 70ch; color: var(--ink); }
.callout p { margin: 0; color: var(--ink); }
code, kbd { font-family: var(--mono); font-size: .9em; background: var(--sunk); padding: 1px 6px; border-radius: 4px; }
/* ---------- footer ---------- */
.site-foot { margin-top: 80px; border-top: 3px double var(--rule-strong); padding: 30px 0 48px; font-size: 14.5px; color: var(--ink-2); }
.site-foot .wrap { display: grid; grid-template-columns: 1.3fr 1fr 1fr 1fr; gap: 28px; }
.site-foot h4 { margin: 0 0 8px; font-family: var(--serif); font-size: 17px; color: var(--ink); }
.site-foot ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.site-foot a { color: var(--ink-2); }
.site-foot .fine { grid-column: 1 / -1; font-size: 13px; color: var(--ink-3); border-top: 1px solid var(--rule); padding-top: 16px; }
.trust { display: flex; gap: 10px 22px; flex-wrap: wrap; margin: 14px 0 0; padding: 0; list-style: none; font-size: 14.5px; color: var(--ink-2); }
.trust li { display: flex; gap: 8px; align-items: center; }
.trust svg { width: 16px; height: 16px; color: var(--accent); flex: none; }

/* ---------- hub ---------- */
.hub-hero { padding: 54px 0 12px; }
.hub-hero h1 { max-width: 20ch; font-size: clamp(34px, 5.6vw, 58px); }
.hub-hero .lede { font-size: 19px; max-width: 60ch; }
.tools { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; margin-top: 8px; }
.tool-card { background: var(--surface); border: 1px solid var(--rule-strong); border-radius: 10px; box-shadow: var(--shadow); padding: 26px; display: flex; flex-direction: column; gap: 4px; }
.tool-card .tag { align-self: flex-start; margin-bottom: 10px; }
.tool-card h2 { font-size: 28px; margin-bottom: 8px; }
.tool-card p { color: var(--ink-2); margin: 0 0 12px; }
.tool-card ul.facts { list-style: none; margin: 0 0 16px; padding: 0; display: grid; gap: 6px; font-size: 15px; color: var(--ink-2); }
.tool-card ul.facts li { display: flex; gap: 9px; align-items: flex-start; }
.tool-card ul.facts svg { width: 16px; height: 16px; color: var(--accent); flex: none; margin-top: 4px; }
.tool-card .actions { margin-top: auto; display: flex; gap: 10px; flex-wrap: wrap; align-items: center; padding-top: 6px; }
.tool-card .also { margin: 14px 0 0; font-size: 14px; color: var(--ink-3); }
.tool-card .also a { color: var(--ink-2); }
.tag { display: inline-block; font-size: 11px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; padding: 3px 8px; border-radius: 3px; background: var(--accent-soft); color: var(--accent); }
.cols-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }

@media (max-width: 860px) {
  .tools, .cols-3, .site-foot .wrap { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  :root { --gutter: 16px; }
  .site-head .wrap { gap: 8px 14px; }
  .site-head nav { gap: 14px; margin-left: 0; width: 100%; }
  .site-head nav a { font-size: 14px; }
  .hub-hero { padding-top: 32px; }
  .hub-hero .lede { font-size: 16.5px; }
  .tool-card { padding: 20px; }
  .trust { display: grid; grid-template-columns: 1fr; gap: 6px; font-size: 14px; }
  .btn { padding: 10px 14px; }
  section.block { padding-top: 40px; }
}
@media print { .site-head, .site-foot { display: none; } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
.hub-hero .kicker { font-family: var(--serif); font-style: italic; color: var(--ink-3); font-size: 17px; margin-bottom: 6px; }
.hub-hero .trust { margin-top: 18px; }