h1, h2, h3 {
  font-family: var(--display);
  font-weight: 700;
  line-height: 1.15;
  text-wrap: balance;
  margin: 0;
}

p { margin: 0; }

.masthead {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 32px;
  align-items: center;
  padding-block: 12px 36px;
  border-bottom: 3px solid var(--ink);
}

.eyebrow {
  font-family: var(--display);
  font-size: 15px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--berry);
}

h1 {
  font-family: var(--pixel);
  font-size: clamp(38px, 6vw, 62px);
  margin-block: 8px 16px;
}

.lede {
  font-size: 19px;
  max-width: 34em;
  color: var(--ink-soft);
}

.lede strong { color: var(--ink); }

.screen {
  background: var(--ink);
  border-radius: 14px;
  padding: 12px;
  box-shadow: var(--shadow);
}

.screen img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 6px;
  image-rendering: pixelated;
}

.how {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-block: 28px 8px;
  padding: 20px;
  background: var(--ask);
  color: var(--ask-ink);
  border-radius: 12px;
}

.how h2 {
  grid-column: 1 / -1;
  font-size: 22px;
}

.how div { display: grid; gap: 4px; }

.how a { color: inherit; }

.how b {
  font-family: var(--display);
  font-size: 17px;
}

nav.contents {
  position: sticky;
  top: env(safe-area-inset-top, 0px);
  z-index: 5;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-block: 12px;
  margin-block: 20px 8px;
  background: var(--ground);
  border-bottom: 1px solid var(--rule);
  scrollbar-width: thin;
}

nav.contents a {
  flex: none;
  font-family: var(--display);
  font-size: 15px;
  color: var(--ink);
  text-decoration: none;
  padding: 6px 12px;
  border: 2px solid var(--ink);
  border-radius: 999px;
  background: var(--panel);
}

nav.contents a:hover,
nav.contents a:focus-visible {
  background: var(--ink);
  color: var(--panel);
  outline: none;
}

section.chapter {
  display: grid;
  gap: 20px;
  padding-block: 44px 8px;
  scroll-margin-top: 72px;
}

.chapter-head {
  display: grid;
  gap: 8px;
  max-width: 44em;
}

.chapter-head h2 { font-size: clamp(28px, 4vw, 38px); }

.chapter-head p { color: var(--ink-soft); }

.figure {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 20px;
  align-items: center;
}

.figure figcaption {
  color: var(--ink-soft);
  font-size: 15px;
}

.figure figure {
  margin: 0;
  display: grid;
  gap: 8px;
}

.legend {
  display: grid;
  gap: 6px;
  font-size: 15px;
  color: var(--ink-soft);
}

.legend span b { color: var(--ink); }

.rules {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.rule {
  display: grid;
  grid-template-rows: auto 1fr auto auto;
  gap: 10px;
  padding: 20px;
  background: var(--panel);
  border: 2px solid var(--rule);
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.rule h3 { font-size: 21px; }

.rule .said { color: var(--ink); }

.rule .said em { color: var(--ink-soft); }

.ask {
  padding: 10px 12px;
  background: var(--ask);
  color: var(--ask-ink);
  border-radius: 8px;
  font-size: 16px;
}

.ask::before {
  content: "Your call";
  display: block;
  font-family: var(--display);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.tell {
  justify-self: start;
  font: 700 15px var(--body);
  color: var(--panel);
  background: var(--berry);
  border: 0;
  border-radius: 8px;
  padding: 8px 14px;
  text-decoration: none;
}

.tell:hover { filter: brightness(1.08); }

.tell:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 2px;
}

.hint {
  font-size: 14px;
  color: var(--ink-soft);
}

.numbers {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.numbers div {
  display: grid;
  gap: 2px;
  padding: 14px;
  border: 2px solid var(--ink);
  border-radius: 10px;
  background: var(--panel);
}

.numbers b {
  font-family: var(--display);
  font-size: 28px;
  font-variant-numeric: tabular-nums;
}

.numbers span {
  font-size: 14px;
  color: var(--ink-soft);
}

.table-wrap { overflow-x: auto; }

table {
  border-collapse: collapse;
  width: 100%;
  min-width: 520px;
  background: var(--panel);
  border-radius: 10px;
  overflow: hidden;
  font-size: 16px;
}

th, td {
  text-align: left;
  padding: 10px 14px;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
}

th {
  font-family: var(--display);
  font-weight: 500;
  font-size: 15px;
  background: var(--ink);
  color: var(--panel);
}

td.num { font-variant-numeric: tabular-nums; white-space: nowrap; }

.missing {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.missing div {
  padding: 14px;
  border: 2px dashed var(--rule);
  border-radius: 10px;
  display: grid;
  gap: 4px;
}

.missing b { font-family: var(--display); font-size: 17px; }

.missing span { font-size: 15px; color: var(--ink-soft); }

.handbook-foot {
  margin-top: 56px;
  padding-top: 20px;
  border-top: 3px solid var(--ink);
  color: var(--ink-soft);
  font-size: 15px;
  display: grid;
  gap: 8px;
}

@media (max-width: 760px) {
  .masthead, .figure { grid-template-columns: minmax(0, 1fr); }
  .rules { grid-template-columns: minmax(0, 1fr); }
  .how { grid-template-columns: minmax(0, 1fr); }
  .numbers { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .missing { grid-template-columns: minmax(0, 1fr); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}