:root { color-scheme: light; --ink: #263c36; --muted: #4b6059; --leaf: #285846; --sky: #edf5fc; --mint: #e8f1eb; --line: #c8d9d0; }
* { box-sizing: border-box; }
html { background: #f5f9fc; scroll-behavior: auto; }
body { margin: 0; color: var(--ink); background: #f5f9fc; font-family: Optima, Candara, Calibri, "Segoe UI", sans-serif; font-size: 18px; line-height: 1.6; }
button, input { font: inherit; }
a { color: var(--leaf); text-underline-offset: .2em; text-decoration-thickness: .08em; }
a:hover { text-decoration-thickness: .14em; }
a:focus-visible, button:focus-visible, summary:focus-visible, input:focus-visible { outline: 3px solid #235e8a; outline-offset: 5px; }
button { cursor: pointer; }
[hidden] { display: none !important; }
.reader-skip { position: fixed; top: 8px; left: 12px; transform: translateY(-180%); z-index: 20; padding: 12px 20px; min-height: 48px; background: #fff; border: 2px solid var(--leaf); border-radius: 24px; }
.reader-skip:focus { transform: none; }
.primer-shell { width: min(1184px, calc(100% - 64px)); margin: 28px auto; background: #fff; border-radius: 36px; }
.guide-top { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 26px 40px 20px; }
.guide-top__name { display: inline-flex; flex-direction: column; justify-content: center; min-height: 56px; font-size: 25px; font-weight: 700; line-height: 1.2; text-decoration: none; }
.guide-top__descriptor { font-size: 16px; font-weight: 400; margin-top: 7px; color: var(--muted); }
.guide-top__questions { display: inline-flex; align-items: center; justify-content: center; gap: 16px; min-height: 48px; padding: 10px 22px; border-radius: 30px; background: var(--mint); text-decoration: none; font-size: 17px; }
.topic-paths { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 12px; align-items: start; padding: 0 40px 24px; }
.topic-paths__cluster { position: relative; background: #edf5fc; border-radius: 22px; min-width: 0; }
.topic-paths__cluster:nth-child(2) { background: #e8f1eb; }
.topic-paths__cluster:nth-child(3) { background: #f8f1cc; }
.topic-paths__name { cursor: pointer; min-height: 50px; padding: 12px 20px; font-size: 17px; font-weight: 700; }
.topic-paths__items { list-style: none; margin: 0; padding: 0 12px 12px; }
.topic-paths__link { display: flex; align-items: center; min-height: 46px; padding: 9px 12px; border-radius: 15px; line-height: 1.45; font-size: 17px; }
.topic-paths__link:hover { background: #fff; }
.chapter { padding: 28px 72px 56px; }
.chapter-mouth { padding-bottom: 26px; }
.chapter-mouth__kind { margin: 0 0 18px; font-size: 17px; color: var(--muted); }
.chapter-mouth__word-help { max-width: 62ch; margin: 24px 0 0; color: var(--muted); font-size: 17px; }
h1,h2,h3,p { margin-top: 0; }
h1 { font-size: clamp(36px,4vw,58px); line-height: 1.12; font-weight: 600; max-width: 19ch; margin-bottom: 28px; letter-spacing: -.025em; text-wrap: balance; }
h2 { font-size: 29px; line-height: 1.25; font-weight: 600; margin-bottom: 18px; text-wrap: pretty; }
h3 { font-size: 22px; line-height: 1.3; }
p { margin-bottom: 18px; }
.word-entry { display: grid; grid-template-columns: minmax(120px, .48fr) minmax(0, 1fr); gap: 20px; margin: 24px 0 0; padding: 28px 32px; border-radius: 28px; max-width: 880px; }
.word-entry dt { font-weight: 700; font-size: 21px; }
.word-entry dd { margin: 0; max-width: 58ch; }
.answer-stream { width: min(100%, 760px); }
.short-answer { padding: 30px 0; }
.short-answer + .short-answer { border-top: 2px solid #e3ece7; }
.short-answer p { max-width: 68ch; }
.reading-flow__choices { display: flex; flex-wrap: wrap; gap: 8px 24px; margin-top: 8px; }
.reading-flow__link { display: inline-flex; align-items: center; min-height: 48px; max-width: 100%; padding: 9px 0; line-height: 1.4; }
.say-it { max-width: 760px; margin: 20px 0 34px; padding: 26px 30px; }
.say-it p { font-size: 23px; line-height: 1.45; margin: 0; }
.still-life { width: min(100%, 760px); margin: 24px 0 40px; border-radius: 32px; background: #edf5fc; }
.still-life img { width: 100%; height: auto; display: block; border-radius: 32px; color: var(--muted); font-size: 18px; }
.source-slip { width: min(100%,760px); padding: 28px 0; }
.source-slip__label { margin-bottom: 6px; font-weight: 700; }
.source-slip ul { list-style: none; padding: 0; margin: 0; }
.source-slip__link { display: inline-flex; align-items: center; min-height: 48px; padding: 10px 0; font-size: 17px; line-height: 1.45; }
.continue-path { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 24px 30px; margin-top: 24px; border-radius: 28px; }
.continue-path p { margin: 0; font-size: 18px; }
.continue-path__next { display: inline-flex; align-items: center; justify-content: center; min-height: 50px; padding: 12px 24px; border-radius: 28px; background: #fff; line-height: 1.4; font-weight: 700; text-decoration: none; }
.guide-foot { padding: 32px 40px 36px; background: #e9f1f7; border-radius: 0 0 36px 36px; }
.guide-foot p { font-size: 17px; max-width: 72ch; margin-bottom: 18px; }
.guide-foot__links { display: flex; flex-wrap: wrap; gap: 8px 28px; }
.guide-foot__links a { display: inline-flex; align-items: center; min-height: 48px; padding: 8px 0; font-size: 17px; }
@media (max-width: 760px) {
 .primer-shell { width: calc(100% - 24px); margin: 12px auto; border-radius: 28px; }
 .guide-top { padding: 24px 22px 20px; gap: 18px; align-items: flex-start; }
 .guide-top__name { font-size: 23px; }
 .guide-top__descriptor { max-width: 17ch; }
 .guide-top__questions { padding: 10px 14px; font-size: 16px; max-width: 130px; gap: 6px; }
 .topic-paths { padding: 0 22px 20px; gap: 8px; grid-template-columns: 1fr; }
 .topic-paths__name { min-height: 48px; padding: 11px 18px; }
 .chapter { padding: 26px 24px 36px; }
 h1 { font-size: 38px; line-height: 1.13; max-width: 18ch; }
 h2 { font-size: 27px; }
 .word-entry { display: block; padding: 24px; }
 .word-entry dt { margin-bottom: 12px; }
 .short-answer { padding: 26px 0; }
 .say-it { padding: 26px; }
 .continue-path { flex-direction: column; align-items: flex-start; padding: 24px; gap: 14px; }
 .continue-path__next { max-width: 100%; text-align: left; }
 .guide-foot { padding: 28px 24px; border-radius: 0 0 28px 28px; }
}
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; animation: none !important; transition: none !important; } }
@media print {
 html, body { background: #fff; color: #000; }
 .primer-shell { width: 100%; margin: 0; }
 .guide-top, .topic-paths, .guide-foot, .continue-path, .reader-skip, .still-life, .reading-flow__choices { display: none; }
 .chapter { padding: 0; }
 .word-entry { padding: 16px 0; }
 .short-answer { break-inside: avoid; }
 h1 { font-size: 30px; }
 h2 { font-size: 23px; }
}