:root {
  color-scheme: dark;
  --paper: #171d19; --ink: #e7e9e1; --muted: #a6afa6; --line: #39453c;
  --green: #9fc9a8; --green-soft: #25362b; --gold: #e2b96f; --serif: Georgia, "Times New Roman", serif;
  --sans: system-ui, -apple-system, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
html { background: #101411; }
body { margin: 0 auto; max-width: 920px; padding: 48px 70px 64px; background: var(--paper); color: var(--ink); font: 17px/1.66 var(--serif); box-shadow: 0 0 36px #0006; }
a { color: var(--green); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
header { margin: 0 0 2rem; padding-bottom: 1.25rem; border-bottom: 1px solid var(--line); }
.kicker, .eyebrow, .meta, .small, nav, .tag { font: 600 .76rem/1.4 var(--sans); letter-spacing: .09em; text-transform: uppercase; color: var(--muted); }
h1, h2, h3 { font-family: var(--serif); font-weight: 500; line-height: 1.16; }
h1 { max-width: 720px; margin: .5rem 0 .7rem; font-size: clamp(2.2rem, 6vw, 3.4rem); letter-spacing: -.035em; }
h2 { margin: 2.2rem 0 .7rem; font-size: 1.65rem; }
h3 { margin: 0 0 .4rem; font-size: 1.22rem; }
p { margin: .7rem 0 1rem; }
.lede { max-width: 660px; color: #c3cbc1; font-size: 1.22rem; line-height: 1.5; }
.meta { letter-spacing: .04em; text-transform: none; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin: 1.1rem 0; }
.step { padding: 17px 18px; border-top: 3px solid var(--green); background: #202923; }
.step .num { display: block; margin-bottom: .45rem; color: var(--green); font: 700 .76rem var(--sans); letter-spacing: .08em; text-transform: uppercase; }
.callout { margin: 1.5rem 0; padding: 14px 20px; border-left: 3px solid var(--gold); background: #29251b; }
.callout p:last-child { margin-bottom: 0; }
.prompt { margin: 1.1rem 0; padding: 22px 25px; border: 1px solid var(--line); background: #1c241f; }
.prompt ol, .prompt ul { margin: .5rem 0 0; padding-left: 1.3rem; }
.path { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 1rem 0; font: .88rem/1.5 var(--sans); }
.path span { padding: 7px 10px; border: 1px solid var(--line); border-radius: 3px; background: #1c241f; }
.path b { color: var(--gold); }
.quiz { margin: 1.1rem 0; padding: 18px 20px; border: 1px solid var(--line); background: #1c241f; }
.quiz fieldset { min-width: 0; margin: 0 0 1rem; padding: 0; border: 0; }
.quiz legend { margin-bottom: .65rem; font: 600 1rem/1.45 var(--sans); }
.quiz-options { display: grid; gap: 7px; }
.quiz-option { display: flex; gap: .65rem; align-items: baseline; padding: 8px 10px; border: 1px solid var(--line); border-radius: 3px; background: #202923; font: .94rem/1.5 var(--sans); cursor: pointer; }
.quiz-option:hover, .quiz-option:focus-within { border-color: var(--green); }
.quiz-option input { flex: 0 0 auto; accent-color: var(--green); }
.quiz-feedback { min-height: 1.5em; margin: .65rem 0 0; color: var(--muted); font: .88rem/1.5 var(--sans); }
.quiz-feedback:empty { min-height: 0; margin-top: 0; }
.quiz-feedback.is-correct { color: var(--green); }
.quiz-feedback.is-incorrect { color: var(--gold); }
.quiz button { margin: .2rem .5rem .2rem 0; padding: .55rem .8rem; border: 1px solid var(--line); border-radius: 3px; background: var(--green-soft); color: var(--ink); font: 600 .84rem var(--sans); cursor: pointer; }
.quiz button:hover { border-color: var(--green); }
.quiz button:focus-visible { outline: 2px solid var(--gold); outline-offset: 2px; }
footer { margin-top: 2.5rem; padding-top: 1rem; border-top: 1px solid var(--line); color: var(--muted); font-size: .92rem; }
.ref-list li { margin: .5rem 0; }
table { width: 100%; border-collapse: collapse; margin: 1rem 0; font-size: .96rem; }
th, td { padding: 10px 12px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { color: var(--green); font: 600 .76rem/1.4 var(--sans); letter-spacing: .06em; text-transform: uppercase; }
@media (max-width: 700px) { body { padding: 28px 23px 42px; } .grid { grid-template-columns: 1fr; gap: 9px; } table { font-size: .88rem; } th, td { padding: 8px 6px; } }
@media print { :root { color-scheme: light; --paper: #fff; --ink: #222; --muted: #555; --line: #ccc; --green: #285943; --gold: #89621f; } html { background: white; } body { max-width: none; padding: 0; box-shadow: none; font-size: 11pt; } .lede { color: #444; } a { color: inherit; } .step, .callout, .prompt, .quiz { background: #f4f4ef; break-inside: avoid; } .path span, .quiz-option { background: white; } .quiz button { display: none; } details:not([open]) > :not(summary) { display: block !important; } }