/* WHYSCOPE question pages — one stylesheet for all 84.
   Each page sets only --accent / --band-bg for its chapter, inline in <head>.
   Layout: one narrow reading column on book-cream paper, opened by the chapter
   band; every module is a labelled block separated by a hairline. Phone first. */

:root {
  --paper: #FFF8EE;
  --card: #FFFDF8;
  --ink: #241F1A;
  --ink-soft: #5D5247;
  --rule: #E6D9C6;
  --amber: #B06410;
  --amber-tint: #FBEFDF;
  --ice: #CBDEE9;
  --ice-line: #7FA3B8;
  --accent: #2E3A8C;
  --band-bg: #2E3A8C;
  --band-fg: #FFF8EE;
  --display: "Baloo 2", "Trebuchet MS", system-ui, sans-serif;
  --body: "Andika", "Segoe UI", system-ui, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #14120E;
    --card: #1D1A15;
    --ink: #F4ECE0;
    --ink-soft: #B3A696;
    --rule: #342D24;
    --amber: #EDA55E;
    --amber-tint: #2B2013;
    --ice: #3C5464;
    --ice-line: #8FB4C8;
    --band-fg: #F1E9DD;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #14120E;
  --card: #1D1A15;
  --ink: #F4ECE0;
  --ink-soft: #B3A696;
  --rule: #342D24;
  --amber: #EDA55E;
  --amber-tint: #2B2013;
  --ice: #3C5464;
  --ice-line: #8FB4C8;
  --band-fg: #F1E9DD;
  color-scheme: dark;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}
img { max-width: 100%; }
.wrap {
  max-width: 38rem;
  margin: 0 auto;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}

/* --- opening band --- */
.band { background: var(--band-bg); color: var(--band-fg); }
.band .wrap { padding-block: 1.75rem 2rem; }
.mark {
  display: flex; flex-wrap: wrap; align-items: baseline; gap: .5rem .9rem;
  font-family: var(--display); font-weight: 700;
  letter-spacing: .14em; text-transform: uppercase; font-size: .75rem;
  opacity: .82; margin: 0;
}
.mark b { font-size: .9rem; letter-spacing: .2em; opacity: 1; }
h1 {
  font-family: var(--display); font-weight: 700;
  font-size: clamp(2rem, 8.5vw, 3rem); line-height: 1.05;
  margin: .85rem 0 0; text-wrap: balance;
}
.lede { margin: .85rem 0 0; font-size: 1.125rem; max-width: 30rem; }
.url-chip {
  display: inline-block; margin: 1.25rem 0 0;
  font-size: .8125rem; letter-spacing: .04em;
  padding: .3rem .6rem; border: 1px solid currentColor; border-radius: 4px;
  opacity: .75;
}

/* --- modules --- */
main .wrap { padding-block: 2.25rem 0; }
section { padding-block: 1.75rem; border-top: 1px solid var(--rule); }
section:first-of-type { border-top: 0; padding-top: 0; }
.label {
  font-family: var(--display); font-weight: 700; font-size: .75rem;
  letter-spacing: .16em; text-transform: uppercase;
  color: var(--accent); margin: 0 0 .6rem;
}
h2 {
  font-family: var(--display); font-weight: 600;
  font-size: 1.5rem; line-height: 1.2; margin: 0 0 .5rem; text-wrap: balance;
}
p { margin: 0 0 .85rem; }
p:last-child { margin-bottom: 0; }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }

/* --- the number that changes --- */
.live {
  background: var(--card); border: 2px solid var(--accent); border-radius: 12px;
  padding: 1.1rem 1.2rem 1rem;
}
.clock {
  display: inline-flex; align-items: center; gap: .4rem; margin: 0;
  font-family: var(--display); font-weight: 700; font-size: .75rem;
  letter-spacing: .13em; text-transform: uppercase; color: var(--accent);
}
.big {
  font-family: var(--display); font-weight: 700;
  font-size: clamp(3.25rem, 16vw, 4.75rem); line-height: .95;
  color: var(--accent); margin: .5rem 0 0;
  font-variant-numeric: tabular-nums;
}
.big small {
  display: block; font-size: 1.125rem; font-weight: 600;
  color: var(--ink); letter-spacing: 0; margin-top: .2rem;
}
.live dl {
  margin: 1rem 0 0; padding-top: .9rem; border-top: 1px solid var(--rule);
  display: grid; gap: .55rem; grid-template-columns: auto 1fr;
  font-size: .9375rem;
}
.live dt {
  font-family: var(--display); font-weight: 700; color: var(--ink-soft);
  font-size: .8125rem; letter-spacing: .08em; text-transform: uppercase;
  padding-top: .15rem;
}
.live dd { margin: 0; min-width: 0; }

/* --- figures --- */
.moving {
  display: inline-flex; align-items: center; gap: .45rem; margin: 0 0 .9rem;
  font-family: var(--display); font-weight: 600; font-size: .8125rem;
  color: var(--accent);
}
figure { margin: 1rem 0 0; }
figure svg {
  display: block; width: 100%; height: auto; max-width: 100%;
  background: var(--card); border: 1px solid var(--rule); border-radius: 10px;
}
figcaption {
  margin: .75rem .25rem 0; font-size: .875rem; color: var(--ink-soft);
  display: flex; flex-wrap: wrap; gap: .75rem; align-items: baseline;
  justify-content: space-between;
}
figcaption > span { flex: 1 1 14rem; min-width: 0; }
button {
  font-family: var(--display); font-weight: 600; font-size: .8125rem;
  color: var(--accent); background: none; cursor: pointer;
  border: 1px solid var(--rule); border-radius: 999px; padding: .35rem .85rem;
}
button:hover { border-color: var(--accent); }
button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* generic animation hooks — an SVG opts in with class="rise" or class="late",
   and sets its own --delay. Nothing animates until the script adds .go, so the
   page is complete and still if the script never runs. */
.rise { transform-box: fill-box; transform-origin: bottom; }
.go .rise { animation: rise .95s cubic-bezier(.2,.85,.25,1) var(--delay, 0s) both; }
.go .late { animation: fade .6s ease var(--delay, 1.25s) both; }
@keyframes rise { from { transform: scaleY(0); } to { transform: scaleY(1); } }
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }
@media (prefers-reduced-motion: reduce) {
  .go .rise, .go .late { animation: none; }
}

/* SVG type — kept here so every figure matches without repeating itself */
.dgm-t { font-family: var(--body); font-size: 13px; fill: currentColor; }
.dgm-n { font-family: var(--display); font-weight: 700; font-size: 15px; fill: currentColor; }
.dgm-v { font-family: var(--body); font-size: 14px; fill: var(--ink-soft); font-variant-numeric: tabular-nums; }
.dgm-ax { font-family: var(--body); font-size: 13px; fill: var(--ink-soft); font-variant-numeric: tabular-nums; }
.dgm-hi { font-family: var(--body); font-weight: 700; font-size: 13px; fill: var(--amber); }
.dgm-callout { font-family: var(--display); font-weight: 700; font-size: 13px; fill: var(--band-fg); }

/* --- correction / disagreement --- */
.flag {
  background: var(--amber-tint); border-left: 4px solid var(--amber);
  border-radius: 0 8px 8px 0; padding: 1rem 1.1rem;
}
.flag .label { color: var(--amber); }
.flag .stamp { font-size: .8125rem; color: var(--ink-soft); margin: .6rem 0 0; }
.flag s { color: var(--ink-soft); }
.numbers {
  display: flex; flex-wrap: wrap; gap: .4rem; margin: 0 0 .85rem;
  font-family: var(--display); font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.numbers span {
  border: 1px solid var(--amber); border-radius: 999px;
  padding: .1rem .7rem; font-size: 1rem; color: var(--amber);
}

/* --- wow number --- */
.wow { display: flex; flex-wrap: wrap; align-items: baseline; gap: .25rem 1rem; margin: 0; }
.wow strong {
  font-family: var(--display); font-weight: 700; font-size: 2.75rem;
  line-height: 1; color: var(--accent); font-variant-numeric: tabular-nums;
}
.wow span { flex: 1 1 15rem; min-width: 0; }

/* --- steps --- */
ol.steps { margin: 1rem 0 0; padding: 0; list-style: none; display: grid; gap: .85rem; counter-reset: s; }
ol.steps li { display: grid; grid-template-columns: 1.75rem 1fr; gap: .75rem; min-width: 0; }
ol.steps li::before {
  counter-increment: s; content: counter(s);
  font-family: var(--display); font-weight: 700; font-size: .9375rem;
  width: 1.75rem; height: 1.75rem; border-radius: 50%;
  background: var(--accent); color: var(--band-fg);
  display: grid; place-items: center;
}

/* --- sources --- */
.srcs { display: grid; gap: .75rem; margin-top: 1rem; }
.src {
  background: var(--card); border: 1px solid var(--rule); border-radius: 8px;
  padding: .85rem 1rem; min-width: 0;
}
.src h3 {
  font-family: var(--body); font-weight: 700; font-size: 1rem;
  margin: 0 0 .35rem; line-height: 1.35;
}
.src .who { font-size: .9375rem; margin: 0; }
.src .who a { word-break: break-word; }
.src .when {
  font-size: .8125rem; color: var(--ink-soft); margin: .4rem 0 0;
  font-variant-numeric: tabular-nums;
}

/* --- glossary --- */
.gloss { margin: 1rem 0 0; display: grid; gap: .85rem; }
.gloss dt { font-family: var(--display); font-weight: 700; font-size: 1.0625rem; color: var(--accent); }
.gloss dd { margin: .15rem 0 0; }

/* --- try it --- */
.tryit { background: var(--amber-tint); border-radius: 10px; padding: 1.1rem 1.2rem; }
.tryit .label { color: var(--amber); }

.where { font-variant-numeric: tabular-nums; }
.more { display: grid; gap: .6rem; margin-top: .9rem; }
.more a { font-weight: 700; word-break: break-word; }

footer { border-top: 1px solid var(--rule); margin-top: 1.75rem; }
footer .wrap { padding-block: 1.5rem 2.5rem; }
footer p { font-size: .875rem; color: var(--ink-soft); }