:root {
  --bg: #f6f5f2;
  --surface: #ffffff;
  --ink: #1b1d21;
  --muted: #5c626b;
  --line: #e3e0d8;
  --accent: #3b4fc4;
  --accent-soft: #e8ebfa;
  --ok: #1f6b4a;
  --ok-soft: #e2f1e9;
  --warn: #8a5a00;
  --warn-soft: #fbf0d9;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #14161a; --surface: #1c1f25; --ink: #e8e7e3; --muted: #a0a6ae; --line: #2e333a;
    --accent: #9aa8ff; --accent-soft: #252b4a; --ok: #7fd1a8; --ok-soft: #1c3329; --warn: #e8b85c; --warn-soft: #3a2f19;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #14161a; --surface: #1c1f25; --ink: #e8e7e3; --muted: #a0a6ae; --line: #2e333a;
  --accent: #9aa8ff; --accent-soft: #252b4a; --ok: #7fd1a8; --ok-soft: #1c3329; --warn: #e8b85c; --warn-soft: #3a2f19;
  color-scheme: dark;
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.6 Inter, system-ui, sans-serif; }
.wrap { max-width: 1060px; margin: 0 auto; padding: 0 16px; }
a { color: var(--accent); }
h1, h2, h3 { font-family: "Source Serif 4", Georgia, serif; font-weight: 600; line-height: 1.2; }
h1 { font-size: clamp(1.9rem, 4.6vw, 2.9rem); margin: .3em 0 .45em; max-width: 22ch; }
h2 { font-size: 1.65rem; margin: 0 0 .5em; }
h3 { font-size: 1.15rem; margin: 0 0 6px; }

.hero { padding-top: 56px; padding-bottom: 24px; }
.eyebrow { color: var(--muted); font-size: .82rem; letter-spacing: .05em; text-transform: uppercase; margin: 0; }
.lede { font-size: 1.12rem; max-width: 66ch; }
.toc { display: flex; flex-wrap: wrap; gap: 6px 16px; margin-top: 18px; font-size: .9rem; }
.toc a { text-decoration: none; border-bottom: 1px solid var(--line); }

section { padding: 40px 0; border-top: 1px solid var(--line); }
.note { color: var(--muted); max-width: 70ch; }
.muted { color: var(--muted); margin: 4px 0 10px; font-size: .9rem; }

.section-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 10px; }
.filters, .samples { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.filters button, .samples button {
  font: inherit; font-size: .82rem; padding: 4px 11px; border-radius: 999px; cursor: pointer;
  border: 1px solid var(--line); background: var(--surface); color: var(--ink);
}
.filters button[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: var(--bg); }
.filters button:hover, .samples button:hover { border-color: var(--accent); }
.samples span { font-size: .82rem; color: var(--muted); }

.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 14px; margin-top: 14px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 18px; display: flex; flex-direction: column; }
.card p { margin: 0 0 10px; font-size: .93rem; }
.kind { font-size: .72rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin: 0 0 4px; }
.fact { font-weight: 500; }
.lbl { display: block; font-size: .72rem; text-transform: uppercase; letter-spacing: .05em; color: var(--accent); margin-bottom: 2px; }
.ask { background: var(--accent-soft); border-radius: 8px; padding: 10px; }
.src { font-size: .8rem; color: var(--muted); margin-top: auto !important; }

.themes { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 14px; }
.theme { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 16px; }
.theme p { margin: 0 0 8px; font-size: .93rem; }
.theme .num { font-family: "Source Serif 4", Georgia, serif; color: var(--accent); font-size: 1.3rem; margin: 0; }

.demo { display: grid; grid-template-columns: 1.1fr 1fr; gap: 20px; background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 20px; }
.demo-in { display: grid; gap: 10px; align-content: start; }
.demo-in label { font-weight: 500; font-size: .92rem; }
textarea { width: 100%; min-height: 120px; padding: 10px; font: inherit; font-size: .93rem; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); color: var(--ink); }
input[type="range"] { width: 100%; accent-color: var(--accent); }
.demo-out .big { font-family: "Source Serif 4", Georgia, serif; font-size: 1.8rem; font-weight: 600; margin: 0 0 8px; color: var(--accent); }
.bar { height: 8px; background: var(--line); border-radius: 999px; overflow: hidden; }
.bar span { display: block; height: 100%; width: 0; background: var(--accent); transition: width .2s ease; }
.action { padding: 10px; border-radius: 8px; font-size: .92rem; }
.action.ok { background: var(--ok-soft); color: var(--ok); }
.action.warn { background: var(--warn-soft); color: var(--warn); }
.msg { font-size: .93rem; border-left: 3px solid var(--line); padding-left: 10px; }

.plan { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.phase { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 16px; }
.phase ul { padding-left: 1.1em; margin: 0; font-size: .93rem; }
.phase li { margin-bottom: 8px; }
.wk { font-size: .78rem; text-transform: uppercase; letter-spacing: .05em; color: var(--accent); font-weight: 600; margin: 0 0 8px; }

.table-wrap { overflow-x: auto; background: var(--surface); border: 1px solid var(--line); border-radius: 12px; }
table { border-collapse: collapse; width: 100%; font-size: .92rem; }
th, td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: .75rem; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); }
tr:last-child td { border-bottom: 0; }

.sources { font-size: .85rem; word-break: break-word; }
.foot { color: var(--muted); font-size: .85rem; padding-top: 24px; padding-bottom: 48px; border-top: 1px solid var(--line); }

@media (max-width: 760px) {
  .demo, .plan { grid-template-columns: 1fr; }
  .cards, .themes { grid-template-columns: 1fr; }
  .hero { padding-top: 32px; }
}