/* Number Draw Ledger — graph-paper numerical editorial */

:root {
  --bg: #F5F2EA;
  --ink: #24313A;
  --slate: #202C35;
  --accent: #D86B45;
  --sage: #76918B;
  --border: #D7D3C9;
  --muted: #727B7D;
  --panel: #FFF4DC;
  --paper: #FFFdf6;
  --max: 1240px;
  --read: 720px;
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --serif: ui-serif, Georgia, "Times New Roman", serif;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background-color: var(--bg);
  background-image:
    repeating-linear-gradient(0deg, transparent 0, transparent 27px, rgba(36, 49, 58, 0.04) 27px, rgba(36, 49, 58, 0.04) 28px),
    repeating-linear-gradient(90deg, transparent 0, transparent 27px, rgba(36, 49, 58, 0.04) 27px, rgba(36, 49, 58, 0.04) 28px);
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.65;
}

a { color: var(--accent); text-underline-offset: 3px; }
a:hover { color: var(--ink); }

h1, h2, h3 {
  font-family: var(--sans);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.15;
  margin: 0 0 0.5em;
}

p { margin: 0 0 1em; }

code, .num, .draw-value, .face, .mono {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -44px;
  background: var(--slate);
  color: var(--panel);
  padding: 8px 12px;
  z-index: 30;
}
.skip-link:focus { top: 8px; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.wrap { width: min(100% - 32px, var(--max)); margin-inline: auto; }
.wrap-narrow { width: min(100% - 32px, var(--read)); margin-inline: auto; }

.masthead {
  height: 68px;
  border-bottom: 1px solid var(--border);
  background: rgba(245, 242, 234, 0.94);
  position: sticky;
  top: 0;
  z-index: 20;
}

.masthead-inner {
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: var(--ink);
  line-height: 1.05;
  font-family: var(--sans);
  font-weight: 800;
  letter-spacing: 0.12em;
  font-size: 12px;
}
.brand span { letter-spacing: 0.22em; }

.nav {
  display: flex;
  flex-wrap: nowrap;
  gap: 14px;
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}
.nav a { color: var(--ink); text-decoration: none; }
.nav a[aria-current="page"] { color: var(--accent); }

.nav-toggle {
  display: none;
  border: 1px solid var(--border);
  background: var(--paper);
  min-height: 36px;
  padding: 0 12px;
  font: 700 13px var(--sans);
  cursor: pointer;
  border-radius: 4px;
}

.anno {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted);
  margin-bottom: 8px;
}

.intro { max-width: 58ch; color: #3a474d; }

.section {
  padding: 52px 0;
  border-top: 1px solid var(--border);
}
.section h2 { font-size: clamp(24px, 3vw, 32px); }

.instrument {
  padding: 28px 0 12px;
}

.instrument-grid {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: 28px;
  align-items: stretch;
}

.display-panel {
  background: var(--panel);
  border: 1px solid var(--border);
  min-height: 280px;
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.face {
  font-size: clamp(56px, 9vw, 104px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  text-align: center;
  color: var(--slate);
}

.status-kicker {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-align: center;
  color: var(--muted);
}

.display-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}

.desk {
  background: var(--paper);
  border: 1px solid var(--border);
  padding: 20px;
}

.field { margin-bottom: 14px; }
.field label {
  display: block;
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.12em;
  margin-bottom: 6px;
}

input[type="number"],
input[type="text"],
select,
textarea {
  width: 100%;
  font: 15px var(--mono);
  border: 1px solid var(--border);
  background: #fff;
  color: var(--ink);
  min-height: 42px;
  padding: 8px 10px;
  border-radius: 4px;
}

textarea {
  min-height: 220px;
  resize: vertical;
  line-height: 1.5;
}

.field-error {
  min-height: 1.3em;
  font-size: 13px;
  color: #9a3b22;
  margin: 4px 0 0;
}

.check {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--sans);
  font-size: 14px;
}

.btn {
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.04em;
  border: 1px solid transparent;
  min-height: 44px;
  padding: 0 16px;
  cursor: pointer;
  background: var(--accent);
  color: #fff;
  border-radius: 5px;
}
.btn:hover { filter: brightness(1.05); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; filter: none; }

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--border);
}

.btn-slate {
  background: var(--slate);
  color: var(--panel);
}

.results-split {
  display: grid;
  grid-template-columns: 1.6fr 0.9fr;
  gap: 28px;
}

.ledger-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--border);
}

.ledger-list li {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-family: var(--mono);
}

.draw-index { color: var(--muted); letter-spacing: 0.08em; font-size: 12px; }
.draw-value { font-size: 22px; font-weight: 700; }
.ledger-meta { font-size: 14px; color: var(--muted); }
.muted { color: var(--muted); }

.history-log {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 420px;
  overflow: auto;
}

.history-item {
  text-align: left;
  font: 12px/1.4 var(--mono);
  background: var(--paper);
  border: 1px solid var(--border);
  padding: 8px 10px;
  cursor: pointer;
  border-radius: 3px;
}

.slips {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: flex-start;
  min-height: 120px;
}

.slip {
  background: var(--panel);
  border: 1px solid var(--border);
  min-width: 92px;
  padding: 14px 12px 10px;
  transform: translateY(calc(var(--stagger, 0) * 6px)) rotate(calc(var(--stagger, 0) * 0.6deg));
}
.slip-idx { display: block; font: 11px var(--mono); color: var(--muted); }
.slip-val { font: 700 28px/1 var(--mono); }

.preset-row {
  display: grid;
  grid-template-columns: 140px 1fr auto;
  gap: 16px;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 15px;
}
.preset-range { font-family: var(--mono); font-weight: 700; }

.dice-tray {
  background: var(--slate);
  color: #e8e2d6;
  padding: 36px 0;
}
.dice-tray h2, .dice-tray p, .dice-tray label { color: #e8e2d6; }
.dice-tray .muted, .dice-tray .field-error { color: #b7c0c3; }
.dice-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 32px;
}
.dice-faces { display: flex; flex-wrap: wrap; gap: 10px; min-height: 88px; }
.die-face {
  width: 56px;
  height: 56px;
  border: 1px solid #4a5861;
  display: grid;
  place-items: center;
  font: 700 22px var(--mono);
  color: var(--panel);
  background: #2a3842;
}
.dice-total { font: 700 48px/1 var(--mono); color: var(--panel); }

.coin-stage { text-align: center; padding: 12px 0 8px; }
.coin-token {
  width: 180px;
  height: 180px;
  margin: 0 auto 16px;
  border-radius: 50%;
  border: 4px solid var(--slate);
  background: var(--panel);
  display: grid;
  place-items: center;
  font: 800 22px/1 var(--sans);
  letter-spacing: 0.12em;
}
.coin-token[data-side="heads"] { background: #f3e2c4; }
.coin-token[data-side="tails"] { background: #dfe8e4; }
.coin-label {
  font: 800 clamp(36px, 6vw, 64px)/1 var(--sans);
  letter-spacing: -0.05em;
  margin: 8px 0 18px;
}
.coin-counts {
  display: flex;
  justify-content: center;
  gap: 28px;
  font-family: var(--mono);
}

.list-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.9fr;
  gap: 24px;
}
.picked-row {
  display: flex;
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}

.notebook { counter-reset: note; }
.note {
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}
.note h3::before {
  counter-increment: note;
  content: counter(note, decimal-leading-zero) " / ";
  font-family: var(--mono);
  color: var(--muted);
  font-size: 0.72em;
  letter-spacing: 0.08em;
}

.usecase-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 40px;
}
.usecase {
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}
.usecase h3 { font-size: 18px; }

.article-index a {
  display: block;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
  text-decoration: none;
  color: inherit;
}
.article-index strong {
  display: block;
  font-family: var(--sans);
  font-size: 20px;
  letter-spacing: -0.03em;
}

.article-body { padding: 48px 0 80px; }
.article-body h1 { font-size: clamp(30px, 4.4vw, 44px); }
.article-body h2 { margin-top: 1.4em; }
.crumb { font-family: var(--sans); font-size: 13px; color: var(--muted); margin-bottom: 16px; }
.faq dt { font-family: var(--sans); font-weight: 800; margin-top: 14px; }
.faq dd { margin: 4px 0 0; }

.contact-block { font-size: 16px; line-height: 1.8; }

.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0 48px;
  font-size: 14px;
  font-family: var(--sans);
}
.footer-id { font-weight: 800; margin-bottom: 10px; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 6px 0; margin-bottom: 10px; }
.footer-nav span { margin: 0 8px; color: var(--border); }
.footer-nav a { color: var(--ink); text-decoration: none; }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .slip { transform: none; }
}

@media (max-width: 1100px) and (min-width: 761px) {
  .nav { gap: 9px; font-size: 11px; }
}

@media (max-width: 760px) {
  .nav {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 12px 16px 16px;
    gap: 10px;
    white-space: normal;
  }
  .nav.is-open { display: flex; }
  .nav-toggle { display: inline-flex; align-items: center; }
  .instrument-grid,
  .results-split,
  .dice-grid,
  .list-grid,
  .usecase-grid,
  .preset-row {
    grid-template-columns: 1fr;
  }
  .btn { width: 100%; }
  .display-actions .btn { width: auto; flex: 1; }
  .ledger-list { overflow-x: auto; }
  .face { font-size: 64px; }
}