/* SPLITSTEEL · styles.css
   One deliberate look: graphite, steel, and colour only where it means something. */

/* ---------- fonts (self-hosted, latin) ---------- */
@font-face { font-family: "Space Grotesk"; src: url("/fonts/SpaceGrotesk-400.woff2") format("woff2"); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: "Space Grotesk"; src: url("/fonts/SpaceGrotesk-500.woff2") format("woff2"); font-weight: 500; font-style: normal; font-display: swap; }
@font-face { font-family: "Space Grotesk"; src: url("/fonts/SpaceGrotesk-700.woff2") format("woff2"); font-weight: 700; font-style: normal; font-display: swap; }
@font-face { font-family: "IBM Plex Mono"; src: url("/fonts/IBMPlexMono-400.woff2") format("woff2"); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: "IBM Plex Mono"; src: url("/fonts/IBMPlexMono-500.woff2") format("woff2"); font-weight: 500; font-style: normal; font-display: swap; }
@font-face { font-family: "IBM Plex Mono"; src: url("/fonts/IBMPlexMono-600.woff2") format("woff2"); font-weight: 600; font-style: normal; font-display: swap; }

/* ---------- tokens ---------- */
:root {
  /* graphite and steel. Saturated colour is reserved for meaning only:
     --pad and --cipher mark which half of the secret something belongs to. */
  --bg: #0b0c0e;
  --bg-2: #131519;
  --bg-3: #1a1d22;
  --line: rgba(226, 232, 240, 0.10);
  --line-soft: rgba(226, 232, 240, 0.055);
  --fg: #eceef1;
  --muted: #868e99;
  --accent: #a8c0d8;
  --accent-hi: #dceaf6;
  --steel: #b6bfc9;
  --pad: #e8695f;
  --cipher: #5aa9e8;
  --ok: #6fbf95;
  --bad: #e07a5f;
  --display: "Space Grotesk", "Segoe UI", system-ui, sans-serif;
  --serif: "Space Grotesk", "Segoe UI", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "Cascadia Mono", Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --shadow: 0 0 0 1px var(--line);
  --wrap: 1100px;
}

/* ---------- reset-ish ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 16.5px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hi); }
.prose a, .prose-sm a, .foot-small a { text-decoration: underline; text-underline-offset: 3px; text-decoration-color: rgba(168, 192, 216, 0.4); }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
.mono { font-family: var(--mono); }
.dim { color: var(--muted); }

::selection { background: rgba(168, 192, 216, 0.30); }

h1, h2, h3 { font-family: var(--display); font-weight: 700; line-height: 1.08; letter-spacing: -0.022em; text-wrap: balance; }
h2 { font-size: clamp(1.9rem, 4.2vw, 2.9rem); margin-top: 0.9rem; }
h3 { font-size: 1.3rem; font-weight: 500; letter-spacing: -0.012em; }

.kicker {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--accent);
}
.lede { max-width: 46rem; margin-top: 1.1rem; color: var(--muted); font-size: 1.06rem; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 1.25rem; }
main > section, section.wrap { margin-top: clamp(6rem, 12vh, 9.5rem); }
main > section:first-child { margin-top: 4rem; }

/* reveal on scroll */
.rev { opacity: 0; transform: translateY(22px); transition: opacity 0.7s ease, transform 0.7s ease; }
.rev.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .rev { opacity: 1; transform: none; transition: none; }
}

/* ---------- nav ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  display: flex; align-items: center; gap: 1.5rem;
  padding: 0.85rem 1.4rem;
  transition: background 0.35s ease, box-shadow 0.35s ease;
}
.nav.scrolled { background: rgba(11, 12, 14, 0.88); backdrop-filter: blur(10px); box-shadow: 0 1px 0 var(--line-soft); }
.wordmark {
  font-family: var(--mono); font-weight: 600; letter-spacing: 0.22em;
  font-size: 0.95rem; color: var(--fg);
}
.wordmark span { color: var(--accent); }
.nav-links { display: flex; gap: 1.15rem; margin-left: auto; overflow-x: auto; scrollbar-width: none; }
.nav-links::-webkit-scrollbar { display: none; }
.nav-links a {
  font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--muted); padding: 0.35rem 0; border-bottom: 1px solid transparent; white-space: nowrap;
}
.nav-links a:hover { color: var(--fg); }
.nav-links a.nav-home { color: var(--accent); }
.nav-links a.active { color: var(--accent); border-bottom-color: var(--accent); }

/* ---------- hero ---------- */
.hero {
  position: relative; isolation: isolate;
  min-height: 100svh;
  display: flex; flex-direction: column; justify-content: flex-end;
  overflow: hidden;
  background:
    radial-gradient(120% 90% at 78% 10%, #1d222a 0%, rgba(29, 34, 42, 0) 55%),
    radial-gradient(100% 100% at 20% 100%, #101216 0%, var(--bg) 70%),
    var(--bg);
}
.hero-video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: -1; }
.hero-shade {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background:
    linear-gradient(to top, var(--bg) 0%, rgba(11, 12, 14, 0.74) 22%, rgba(11, 12, 14, 0.20) 52%, rgba(11, 12, 14, 0.08) 100%),
    radial-gradient(140% 100% at 50% 50%, rgba(0,0,0,0) 60%, rgba(4, 5, 7, 0.55) 100%);
}
.hero-inner { position: relative; z-index: 1; max-width: var(--wrap); width: 100%; margin: 0 auto; padding: 7rem 1.25rem 5.5rem; }
.hero h1 { font-size: clamp(2.5rem, 6.4vw, 4.6rem); margin-top: 1.1rem; max-width: 18ch; }
.hero-sub { max-width: 34rem; margin-top: 1.4rem; color: rgba(239, 233, 221, 0.82); font-size: 1.1rem; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-top: 2rem; }
.hero-pdf {
  display: inline-block; margin-top: 1.1rem;
  font-size: 0.7rem; letter-spacing: 0.18em; text-transform: uppercase;
  color: rgba(239, 233, 221, 0.66);
}
.hero-pdf:hover { color: var(--accent-hi); }
.hero-badge {
  position: absolute; top: 4.4rem; right: 1.4rem; z-index: 1;
  font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--muted); border: 1px solid var(--line); border-radius: 999px; padding: 0.45rem 0.9rem;
  background: rgba(11, 12, 14, 0.55);
}
@media (max-width: 720px) { .hero-badge { display: none; } }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--mono); font-size: 0.72rem; font-weight: 600;
  letter-spacing: 0.18em; text-transform: uppercase;
  padding: 0.85rem 1.35rem; border-radius: 4px;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.15s ease;
}
.btn:active { transform: translateY(1px); }
.btn-amber { background: var(--fg); color: #0b0c0e; }
.btn-amber:hover { background: #fff; color: #0b0c0e; }
.btn-ghost { border: 1px solid var(--line); color: var(--fg); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent-hi); }
.btn-ghost:disabled { opacity: 0.35; cursor: default; }
.btn-ghost:disabled:hover { border-color: var(--line); color: var(--fg); }
.btn-inline { padding: 0.5rem 0.9rem; margin-left: 0.6rem; vertical-align: middle; }

/* ---------- cards ---------- */
.card {
  background: var(--bg-2);
  border-radius: 10px;
  box-shadow: var(--shadow);
  padding: 1.5rem;
}
.card-inset { background: var(--bg); border-radius: 8px; box-shadow: 0 0 0 1px var(--line-soft); padding: 1rem 1.25rem; }
.pad-card h3 { margin-bottom: 0.7rem; }

/* ---------- hard rule ---------- */
.hardrule {
  border-left: 3px solid var(--accent);
  background: linear-gradient(90deg, rgba(168, 192, 216, 0.06), rgba(168, 192, 216, 0) 65%);
  padding: 1.6rem 1.8rem;
  border-radius: 0 10px 10px 0;
}
.hardrule-big { font-family: var(--serif); font-size: clamp(1.15rem, 2vw, 1.45rem); line-height: 1.5; margin-top: 0.8rem; max-width: 58rem; }
.hardrule-big strong { color: var(--accent-hi); font-weight: 600; }

/* ---------- columns ---------- */
.cols { display: grid; gap: 2rem; margin-top: 2.4rem; }
@media (min-width: 900px) { .cols { grid-template-columns: 1fr 1fr; gap: 3rem; } }
.cols-center { align-items: center; }
.prose p + p, .prose-sm + .prose-sm { margin-top: 1rem; }
.prose { color: var(--muted); }
.prose strong, .prose em { color: var(--fg); }
.prose h3 { color: var(--fg); margin-bottom: 0.8rem; }
.prose-sm { font-size: 0.92rem; color: var(--muted); }
.prose-sm strong { color: var(--fg); }
.photo { border-radius: 10px; box-shadow: var(--shadow); }

/* ---------- equation ---------- */
.equation svg { width: 100%; height: auto; }
.eq-box rect { fill: var(--bg); stroke: var(--line); stroke-width: 1; }
.eq-box .eq-label { fill: var(--muted); font-family: var(--mono); font-size: 11px; letter-spacing: 0.2em; text-anchor: middle; }
.eq-box .eq-hex { fill: var(--fg); font-family: var(--mono); font-size: 15px; text-anchor: middle; }
.eq-amber rect { fill: rgba(168, 192, 216, 0.12); stroke: var(--accent); }
.eq-amber .eq-label { fill: var(--accent); }
.eq-amber .eq-hex { fill: var(--accent-hi); }
.eq-op { fill: var(--accent); font-family: var(--mono); font-size: 26px; text-anchor: middle; }
.eq-line { stroke: var(--line); stroke-width: 1.5; fill: none; }
.equation figcaption { margin-top: 0.9rem; font-family: var(--mono); font-size: 0.72rem; line-height: 1.7; color: var(--muted); }

/* ---------- objects ---------- */
.objects { display: grid; gap: 1.4rem; margin-top: 3rem; }
@media (min-width: 820px) { .objects { grid-template-columns: repeat(3, 1fr); } }
.object { padding: 0; overflow: hidden; transition: transform 0.35s ease, box-shadow 0.35s ease; }
.object:hover { transform: translateY(-5px); box-shadow: var(--shadow), 0 18px 40px rgba(0, 0, 0, 0.45); }
.object img { aspect-ratio: 4 / 3; object-fit: cover; filter: saturate(1); }
.object figcaption { padding: 1.15rem 1.3rem 1.4rem; font-size: 0.9rem; color: var(--muted); }
.obj-name { font-family: var(--mono); font-size: 0.72rem; font-weight: 600; letter-spacing: 0.24em; text-transform: uppercase; color: var(--accent); margin-bottom: 0.45rem; }

/* ---------- lab ---------- */
.lab { margin-top: 2.4rem; padding: 1.8rem; }
.lab-toy {
  font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--muted);
  border: 1px dashed var(--line); border-radius: 6px;
  padding: 0.55rem 0.9rem; display: inline-block;
}
.lab-grid { display: grid; grid-template-columns: auto 1fr; gap: 0.7rem 1.1rem; align-items: center; margin-top: 1.4rem; }
.lab-rowlabel { font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--muted); text-align: right; }
.lab-row { display: flex; flex-wrap: wrap; gap: 0.3rem; }
.lab-cell {
  font-family: var(--mono); font-size: 1.02rem; font-weight: 500;
  width: 2.05rem; height: 2.5rem; display: grid; place-items: center;
  background: var(--bg); border-radius: 6px; box-shadow: 0 0 0 1px var(--line-soft);
  cursor: pointer; transition: box-shadow 0.15s ease, background 0.15s ease, color 0.2s ease;
}
.lab-cell:hover { box-shadow: 0 0 0 1px var(--line); }
.lab-cell.sel { box-shadow: 0 0 0 1.5px var(--accent); background: rgba(168, 192, 216, 0.08); }
.lab-out .lab-cell { color: var(--accent-hi); background: rgba(168, 192, 216, 0.07); }
.lab-out .lab-cell.ghost { color: transparent; }
.lab-cell.flip { animation: labflip 0.5s ease; }
@keyframes labflip { 0% { transform: rotateX(90deg); opacity: 0; } 100% { transform: none; opacity: 1; } }
.lab-binary { margin-top: 1.2rem; font-family: var(--mono); font-size: 0.9rem; line-height: 2; }
.lab-binary .bit-same { color: var(--muted); }
.lab-binary .bit-diff { color: var(--accent-hi); font-weight: 600; }
.lab-binary .bin-label { display: inline-block; width: 6.2rem; color: var(--muted); font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; }
.lab-buttons { display: flex; flex-wrap: wrap; gap: 0.7rem; margin-top: 1.5rem; }
.lab-hint { margin-top: 1rem; font-size: 0.82rem; color: var(--muted); }
.check-cols { margin-top: 3rem; }
.checkdemo-body { margin-top: 1rem; font-size: 0.95rem; line-height: 2.1; }
.checkdemo-body .cg { color: var(--accent-hi); font-weight: 600; }
.checkdemo-body .zero { color: var(--ok); font-weight: 600; }

/* ---------- tables ---------- */
.tablewrap { margin-top: 2.2rem; padding: 0; overflow-x: auto; }
table { width: 100%; border-collapse: collapse; text-align: left; font-size: 0.92rem; min-width: 560px; }
thead th {
  font-family: var(--mono); font-weight: 500; font-size: 0.68rem; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--accent); padding: 1.05rem 1.3rem;
}
tbody td { padding: 1rem 1.3rem; border-top: 1px solid var(--line-soft); color: var(--muted); vertical-align: top; }
tbody td:first-child { color: var(--fg); }
td.good { color: var(--ok); }
td.bad { color: var(--bad); }
.layers { padding-left: 1.2rem; color: var(--muted); font-size: 0.92rem; display: grid; gap: 0.7rem; }
.layers strong { color: var(--fg); }
.layers em { color: var(--accent-hi); font-style: normal; }

/* ---------- stats ---------- */
.statcard { display: flex; flex-direction: column; justify-content: center; gap: 1.1rem; padding: 2rem; }
.statcard hr { border: none; border-top: 1px solid var(--line-soft); }
.stat-big { font-family: var(--serif); font-size: 3.4rem; line-height: 1; color: var(--accent-hi); }
.stat-big span { font-size: 1.3rem; color: var(--muted); margin-left: 0.35rem; }
.stat-cap { color: var(--muted); font-size: 0.9rem; max-width: 26rem; }

/* ---------- dice card ---------- */
.dicecard { padding: 1.6rem; }
.dicecard-head { font-family: var(--mono); font-size: 0.72rem; font-weight: 600; letter-spacing: 0.2em; text-transform: uppercase; color: var(--accent); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 0.4rem; }
.dicecard-head span { color: var(--muted); font-weight: 400; letter-spacing: 0.1em; }
.dicetable { margin-top: 1.1rem; min-width: 0; width: 100%; border-collapse: separate; border-spacing: 4px; }
.dicetable th { font-size: 0.78rem; color: var(--muted); font-weight: 500; padding: 0.3rem; text-align: center; }
.dicetable td {
  border: none; padding: 0;
  height: 2.7rem; text-align: center; vertical-align: middle;
  font-size: 1.05rem; font-weight: 600; color: var(--fg);
  background: var(--bg); border-radius: 6px; box-shadow: 0 0 0 1px var(--line-soft);
}
.dicetable td.reroll { color: var(--muted); background: transparent; box-shadow: 0 0 0 1px transparent; border: 1px dashed var(--line); }
.dicecard-foot { margin-top: 1rem; font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.08em; color: var(--muted); }

/* ---------- steps ---------- */
.kitpath { margin-top: 2rem; border-left: 3px solid var(--accent); border-radius: 0 10px 10px 0; }
.kitpath .prose-sm { margin-top: 0.6rem; }
.kitpath strong { color: var(--fg); }
.diy-tag {
  display: inline-block; margin-left: 0.7rem; vertical-align: middle;
  font-family: var(--mono); font-size: 0.62rem; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--muted); border: 1px dashed var(--line); border-radius: 999px; padding: 0.25rem 0.6rem;
}
.steps { list-style: none; margin-top: 2.6rem; display: grid; gap: 1rem; counter-reset: step; }
.steps > li { display: grid; grid-template-columns: 4.2rem 1fr; gap: 1.2rem; padding: 1.6rem 1.7rem; }
.step-n { font-family: var(--mono); font-weight: 600; color: var(--accent); letter-spacing: 0.15em; padding-top: 0.35rem; }
.steps h3 { margin-bottom: 0.5rem; }
.steps p { color: var(--muted); font-size: 0.95rem; }
.steps strong { color: var(--fg); }
@media (max-width: 620px) { .steps > li { grid-template-columns: 1fr; gap: 0.4rem; } }

.codecard { margin-top: 2rem; overflow-x: auto; }
.codecard pre { margin-top: 1rem; font-size: 0.84rem; line-height: 1.75; color: var(--steel); }
.codecard code { font-family: var(--mono); }

/* ---------- recover ---------- */
.recover-list { list-style: none; counter-reset: rec; display: grid; gap: 1.1rem; color: var(--muted); font-size: 0.97rem; }
.recover-list li { counter-increment: rec; display: grid; grid-template-columns: 2.4rem 1fr; gap: 0.6rem; }
.recover-list li::before {
  content: counter(rec, decimal-leading-zero);
  font-family: var(--mono); font-size: 0.8rem; font-weight: 600; color: var(--accent); padding-top: 0.2rem;
}

/* ---------- fire drill ---------- */
.fire-band {
  background:
    linear-gradient(rgba(11, 12, 14, 0.90), rgba(11, 12, 14, 0.965)),
    url("/images/two-houses.jpg") center 30% / cover no-repeat fixed;
  padding: clamp(5rem, 10vh, 8rem) 0;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}
@media (max-width: 900px) { .fire-band { background-attachment: scroll; } }
.drill { margin-top: 2.4rem; }
.drill-modes { display: flex; gap: 0.7rem; flex-wrap: wrap; }
.btn-mode { border: 1px solid var(--line); color: var(--muted); }
.btn-mode.is-on { background: var(--fg); border-color: var(--fg); color: #0b0c0e; }
.drill-sites { display: grid; gap: 1rem; margin-top: 1.4rem; }
@media (min-width: 820px) { .drill-sites { grid-template-columns: repeat(3, 1fr); } }
.site { text-align: left; position: relative; transition: transform 0.25s ease, box-shadow 0.25s ease, opacity 0.3s ease; }
.site:hover { transform: translateY(-3px); }
.site-name { font-family: var(--serif); font-size: 1.25rem; color: var(--fg); }
.site-name span { display: block; font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted); margin-top: 0.3rem; }
.site ul { list-style: none; margin-top: 0.9rem; display: grid; gap: 0.35rem; }
.site li { font-family: var(--mono); font-size: 0.8rem; color: var(--steel); }
.site li::before { content: "▪ "; color: var(--accent); }
.site li em { color: var(--muted); font-style: normal; font-size: 0.7rem; }
.site-state { position: absolute; top: 1rem; right: 1.1rem; font-size: 1.5rem; }
.site.hit { box-shadow: 0 0 0 1.5px var(--bad); }
.site.hit .site-name, .site.hit li { color: var(--muted); text-decoration: line-through; text-decoration-color: rgba(207, 122, 85, 0.6); }
.site.hit .site-name span { text-decoration: none; }
.drill-verdict { margin-top: 1.4rem; display: grid; grid-template-columns: auto 1fr; gap: 1.4rem; align-items: center; padding: 1.4rem 1.7rem; }
@media (max-width: 620px) { .drill-verdict { grid-template-columns: 1fr; gap: 0.5rem; } }
.verdict-word { font-family: var(--mono); font-weight: 600; font-size: 1.05rem; letter-spacing: 0.22em; }
.verdict-word.ok { color: var(--ok); }
.verdict-word.warn { color: var(--accent-hi); }
.verdict-word.lost { color: var(--bad); }
.verdict-body { color: var(--muted); font-size: 0.95rem; }
.drill-note { margin-top: 1.6rem; max-width: 46rem; color: var(--muted); font-size: 0.9rem; font-style: italic; }

/* ---------- metal ---------- */
.dodont { list-style: none; display: grid; gap: 0.7rem; font-size: 0.92rem; color: var(--muted); }
.dodont li { padding-left: 1.7rem; position: relative; }
.dodont li::before { position: absolute; left: 0; font-family: var(--mono); font-weight: 600; }
.dodont .do::before { content: "✓"; color: var(--ok); }
.dodont .dont::before { content: "✕"; color: var(--bad); }

/* ---------- heirs ---------- */
.letter { background: #eef1f4; color: #14171b; padding: 2rem 2.1rem; }
.letter-head { font-family: var(--mono); font-size: 0.7rem; font-weight: 600; letter-spacing: 0.22em; text-transform: uppercase; color: #5b6675; }
.letter-body { margin-top: 1.2rem; font-family: var(--display); font-size: 0.95rem; line-height: 1.75; font-weight: 400; }
.letter-body p + p { margin-top: 0.9rem; }
.letter-body strong { font-weight: 600; }
.blank {
  display: inline-block; min-width: 7rem; text-align: center;
  border-bottom: 1px solid #5b6675; color: #5b6675;
  font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.06em;
  padding: 0 0.4rem;
}
.letter-sign { margin-top: 1.4rem; }

/* ---------- checklist ---------- */
.checklist { margin-top: 2rem; padding: 1.8rem; }
.check-progress { font-size: 0.72rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--accent); }
#check-items { list-style: none; margin-top: 1.2rem; display: grid; gap: 0.15rem; }
#check-items label {
  display: grid; grid-template-columns: 1.5rem 1fr; gap: 0.9rem; align-items: start;
  padding: 0.6rem 0.7rem; border-radius: 6px; cursor: pointer;
  color: var(--muted); font-size: 0.95rem; transition: background 0.15s ease;
}
#check-items label:hover { background: rgba(168, 192, 216, 0.05); }
#check-items input {
  appearance: none; width: 1.15rem; height: 1.15rem; margin-top: 0.2rem;
  border: 1px solid var(--line); border-radius: 4px; cursor: pointer;
  display: grid; place-items: center; background: var(--bg);
}
#check-items input:checked { background: var(--fg); border-color: var(--fg); }
#check-items input:checked::after { content: "✓"; color: #0b0c0e; font-size: 0.8rem; font-weight: 700; }
#check-items input:checked + span { color: var(--fg); text-decoration: line-through; text-decoration-color: rgba(168, 192, 216, 0.5); }

/* ---------- kit ---------- */
.kitcard { display: grid; gap: 2rem; padding: 2.2rem; align-items: center; overflow: hidden; }
@media (min-width: 900px) { .kitcard { grid-template-columns: 1.1fr 1fr; } }
.kit-h { font-size: clamp(1.6rem, 3vw, 2.2rem); margin: 0.8rem 0 1rem; }
.kit-img { border-radius: 8px; }

.sub-h { margin-top: 2.6rem; font-size: 1.25rem; }

/* ---------- footer ---------- */
.footer { margin-top: clamp(6rem, 12vh, 9rem); border-top: 1px solid var(--line-soft); padding: 3.5rem 1.25rem 4.5rem; text-align: center; }
.foot-line { margin-top: 1rem; font-size: 0.72rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--muted); }
.foot-small { margin: 1.6rem auto 0; max-width: 44rem; font-size: 0.8rem; color: var(--muted); }

/* ---------- print ---------- */
@media print {
  body { background: #fff; color: #111; font-size: 12pt; }
  body::after, .nav, .hero, .hero-badge, .btn, .lab-hint, .footer { display: none !important; }
  main > section { margin-top: 2rem; }
  .card, .fire-band { background: #fff; box-shadow: none; border: 1px solid #bbb; }
  .kicker { color: #7a5f33; }
  a { color: #111; }
  /* focused prints: html[data-print] shows only the target */
  html[data-print] body > * { display: none !important; }
  html[data-print] main { display: block !important; }
  html[data-print] main > section { display: none !important; }
  html[data-print="dice"] #dice { display: block !important; margin: 0; }
  html[data-print="dice"] #dice .cols > .prose { display: none; }
  html[data-print="heirs"] #heirs { display: block !important; margin: 0; }
  html[data-print="heirs"] #heirs .cols > .prose { display: none; }
  html[data-print="heirs"] .letter { background: #fff; color: #111; }
  html[data-print="checklist"] #checklist { display: block !important; margin: 0; }
  .dicetable td, .dicetable th { color: #111; background: #fff; box-shadow: none; border: 1px solid #999; }
  .dicetable td.reroll { border-style: dashed; color: #999; }
  .rev { opacity: 1 !important; transform: none !important; }
}

/* ---------- XOR lookup card ---------- */
.xorcard { margin-bottom: 1.4rem; }
.xortable { border-spacing: 2px; }
.xortable td, .xortable th { height: 1.55rem; font-size: 0.72rem; padding: 0; }
.xortable td { background: var(--bg); box-shadow: 0 0 0 1px var(--line-soft); color: var(--steel); }
@media print { html[data-print="dice"] #print-xor { display: block !important; } }

/* verification block on the landing: the long command lines must not force the code column wide */
#proof.cols > .card { min-width: 0; }
#proof pre { overflow-x: auto; }