:root {
  color-scheme: light;
  --ink: #202a35;
  --muted: #5a6874;
  --paper: #fbfaf6;
  --panel: #fff;
  --line: #d8dedc;
  --accent: #146b65;
  --accent-soft: #e4f2ef;
  --warm: #b65a32;
  --good: #17643d;
  --bad: #9b342d;
  --shadow: 0 18px 55px rgb(28 52 50 / 8%);
  font: 16px/1.65 Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
body { margin: 0; color: var(--ink); background: var(--paper); }
a { color: var(--accent); text-underline-offset: .18em; }
a:hover { color: var(--warm); }
.page { width: min(920px, calc(100% - 2rem)); margin: 0 auto; padding: 3rem 0 5rem; }
.eyebrow { color: var(--accent); font-size: .78rem; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
h1, h2, h3 { font-family: Georgia, "Times New Roman", serif; line-height: 1.18; }
h1 { max-width: 16ch; margin: .45rem 0 1rem; font-size: clamp(2.45rem, 7vw, 4.6rem); letter-spacing: -.045em; }
h2 { margin-top: 3rem; font-size: clamp(1.65rem, 4vw, 2.2rem); }
h3 { margin-bottom: .35rem; font-size: 1.25rem; }
.dek { max-width: 66ch; color: var(--muted); font-size: 1.18rem; }
.meta { display: flex; flex-wrap: wrap; gap: .6rem; margin: 1.4rem 0 2rem; }
.pill { padding: .28rem .68rem; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); font-size: .82rem; }
.card { margin: 1.2rem 0; padding: 1.35rem 1.5rem; border: 1px solid var(--line); border-radius: 1rem; background: var(--panel); box-shadow: var(--shadow); }
.callout { border-left: 4px solid var(--accent); background: var(--accent-soft); }
.question { color: var(--accent); font-weight: 800; }
.flow { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: .55rem; margin: 1.6rem 0; }
.step { min-width: 145px; padding: .85rem; border: 1px solid var(--line); border-radius: .75rem; background: var(--panel); text-align: center; }
.arrow { color: var(--warm); font-size: 1.3rem; font-weight: 800; }
code, pre { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
code { padding: .08rem .28rem; border-radius: .25rem; background: #edf0ee; font-size: .92em; }
pre { overflow-x: auto; padding: 1rem 1.15rem; border-radius: .75rem; background: #18252d; color: #f2f5f3; line-height: 1.55; }
pre code { padding: 0; background: transparent; color: inherit; }
.quiz { margin-top: 1rem; }
.question-block { padding: 1rem 0; border-top: 1px solid var(--line); }
.option { display: block; margin: .55rem 0; padding: .7rem .85rem; border: 1px solid var(--line); border-radius: .6rem; cursor: pointer; }
.option:hover { border-color: var(--accent); background: var(--accent-soft); }
.option input { margin-right: .55rem; accent-color: var(--accent); }
button { padding: .7rem 1rem; border: 0; border-radius: .6rem; color: #fff; background: var(--accent); font: inherit; font-weight: 750; cursor: pointer; }
button:hover { background: #0d514d; }
.feedback { min-height: 1.8em; margin: .75rem 0 0; font-weight: 700; }
.feedback[data-state="correct"] { color: var(--good); }
.feedback[data-state="incorrect"] { color: var(--bad); }
.small { color: var(--muted); font-size: .92rem; }
.two-col { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: .72rem; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { color: var(--accent); }
fieldset { min-width: 0; margin: 0; padding: 0; border: 0; }
legend { margin-bottom: .65rem; }
footer { margin-top: 3rem; padding-top: 1rem; border-top: 1px solid var(--line); color: var(--muted); font-size: .9rem; }
@media (max-width: 650px) { .two-col { grid-template-columns: 1fr; } .page { padding-top: 2rem; } }
@media print {
  :root { --paper: #fff; --panel: #fff; --shadow: none; }
  .page { width: 100%; padding: 0; }
  .card { break-inside: avoid; box-shadow: none; }
  button, .quiz { display: none; }
  a { color: inherit; }
}