@font-face {
  font-family: 'Fredoka';
  font-style: normal;
  font-display: swap;
  font-weight: 500 700;
  src: url('/assets/fonts/Fredoka-Variable.woff2') format('woff2-variations');
}

@font-face {
  font-family: 'Nunito';
  font-style: normal;
  font-display: swap;
  font-weight: 400 800;
  src: url('/assets/fonts/Nunito-Variable.woff2') format('woff2-variations');
}

@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-display: swap;
  font-weight: 500;
  src: url('/assets/fonts/IBMPlexMono-Medium.woff2') format('woff2');
}

@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-display: swap;
  font-weight: 600;
  src: url('/assets/fonts/IBMPlexMono-SemiBold.woff2') format('woff2');
}

:root {
  --ink: #3a2c35;
  --muted-ink: #705f6a;
  --page-blush: #fff9f5;
  --surface: #fff;
  --soft-rose: #fff1f4;
  --decorative-border: #ded1d8;
  --control-border: #a58f9b;
  --raised-shadow: #f0e5e8;
  --brand: #c64a65;
  --brand-strong: #a43d57;
  --brand-soft: #f4f0fc;
  --coral: var(--brand);
  --coral-accessible: var(--brand-strong);
  --coral-deep: #8f3049;
  --excluded-rose-border: #c64a65;
  --excluded-ink: #a43d57;
  --lavender: #8870c5;
  --lavender-deep: #6f59b8;
  --soft-lavender: #f4f0fc;
  --mint: #bfe7d9;
  --mint-accent: #72b9a2;
  --mint-deep: #286b58;
  --verified-mint-border: #2f7a65;
  --soft-mint: #eaf8f2;
  --butter: #f2ca63;
  --butter-border: #d4a536;
  --butter-deep: #664c05;
  --soft-butter: #fff4c9;
  --selection: #ffe8a3;
  --selection-border: #c64a65;
  --run-highlight: #ffe5dc;
  --derived-border: #a795d2;
  --kakuro-block: #e8dde4;
  --kakuro-clue: #f3eaf0;
  --kakuro-clue-ink: #4c3a46;
  --kakuro-grid-line: #816c78;
  --contradiction: #a43d57;
  --soft-contradiction: #fff1f4;
  --nav-ink: #382d3c;
  --nav-accent: #6f59b8;
  --nav-accent-strong: #5e48a5;
  --nav-soft: #f1edff;
  --nav-border: #ded7ed;
  --panel-shadow: 0 12px 32px rgb(120 70 92 / 10%);
  --display: 'Fredoka', 'Arial Rounded MT Bold', ui-rounded, system-ui, sans-serif;
  --sans: 'Nunito', ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono: 'IBM Plex Mono', 'SFMono-Regular', Consolas, 'Liberation Mono', monospace;

  /* Temporary game-board aliases retained until the board-specific M4 passes. */
  --ink-2: var(--ink);
  --paper: var(--page-blush);
  --sheet: var(--surface);
  --amber: var(--coral-accessible);
  --amber-deep: var(--coral-deep);
  --moss: var(--muted-ink);
  --moss-dark: var(--muted-ink);
  --mist: var(--decorative-border);
  --error: var(--contradiction);
  --shadow-row: var(--panel-shadow);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; background: var(--page-blush); }

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background: var(--page-blush);
  font-family: var(--sans);
  line-height: 1.5;
}

button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 4px; }
button:focus-visible, a:focus-visible, summary:focus-visible { outline: 3px solid var(--nav-accent-strong); outline-offset: 3px; }

.skip-link {
  position: fixed;
  left: 1rem;
  top: -5rem;
  z-index: 100;
  padding: .7rem 1rem;
  background: var(--lavender-deep);
  color: var(--surface);
}
.skip-link:focus { top: 1rem; }

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  min-height: 82px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: clamp(1rem, 2.8vw, 2.5rem);
  padding: .75rem clamp(1rem, 3.5vw, 3.5rem);
  border-bottom: 1px solid var(--nav-border);
  color: var(--nav-ink);
  background: #fff;
  box-shadow: 0 5px 18px rgb(82 63 132 / 7%);
}

.wordmark {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: .65rem;
  width: max-content;
  font: 700 31px/1 var(--display);
  text-decoration: none;
}
.wordmark-symbol { width: 40px; height: 40px; flex: 0 0 40px; }
.wordmark-accent { color: var(--brand); }

.progress-hud { min-width: 0; display: grid; gap: .4rem; }
.progress-hud strong { font: 600 13px/1.2 var(--mono); letter-spacing: .02em; }
.progress-hud strong span { color: var(--nav-accent-strong); font-size: 16px; }
.progress-track { display: grid; grid-template-columns: repeat(6, 1fr); align-items: center; gap: .35rem; }
.progress-track span { height: 9px; border-radius: 9px; background: var(--decorative-border); }
.progress-track span.is-confirmed { background: var(--nav-accent); }

.site-header nav { justify-self: end; display: flex; gap: 28px; font-size: 16px; font-weight: 800; }
.site-header nav a { position: relative; min-width: 44px; min-height: 44px; display: inline-flex; align-items: center; justify-content: center; padding-block: 10px; text-decoration: none; }
.site-header nav a:focus-visible { outline: 3px solid var(--nav-accent-strong); outline-offset: -3px; border-radius: 6px; }
.site-header nav a[aria-current='page'] { color: var(--nav-accent-strong); }
.site-header nav a[aria-current='page']::after {
  position: absolute;
  right: 0;
  bottom: 3px;
  left: 0;
  height: 3px;
  border-radius: 3px;
  background: var(--nav-accent);
  content: '';
}

.play-statusbar {
  min-width: 0;
  display: grid;
  grid-template-columns: minmax(180px, 1fr) auto;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
  padding: .8rem 1rem;
  border: 1px solid var(--decorative-border);
  border-radius: 12px;
  background: var(--page-blush);
}
.play-statusbar .progress-hud { width: min(100%, 390px); }
.play-actions { display: flex; align-items: center; justify-self: end; gap: .65rem; }
.timer { display: inline-flex; align-items: center; gap: .45rem; min-width: 80px; color: var(--ink); font: 600 14px/1 var(--mono); }
.timer i { color: var(--brand); font-size: 1.15rem; }

.primary-button, .secondary-button, .hint-button {
  min-height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .45rem;
  padding: .7rem 1.15rem;
  border-radius: 9px;
  font-weight: 800;
  text-decoration: none;
  cursor: pointer;
}
.primary-button { border: 1px solid var(--brand-strong); color: white; background: var(--brand); box-shadow: none; transition: background-color 180ms ease, transform 180ms ease; }
.primary-button:hover { border-color: var(--brand-strong); background: var(--brand-strong); }
.secondary-button { border: 1px solid var(--decorative-border); color: var(--ink); background: var(--surface); }
.hint-button { border: 1px solid var(--nav-accent); color: var(--nav-accent-strong); background: var(--nav-soft); }
.hint-button:hover { color: white; background: var(--nav-accent-strong); }
.primary-button:active, .secondary-button:active, .hint-button:active { transform: translateY(1px); }

main { width: 100%; }

.case-bar {
  min-height: 174px;
  display: grid;
  grid-template-columns: 180px minmax(420px, 1fr) minmax(320px, .9fr);
  align-items: center;
  gap: clamp(1.5rem, 3.5vw, 3.5rem);
  padding: 1rem clamp(1rem, 3.5vw, 3.5rem);
  border-bottom: 1px solid rgb(243 239 229 / 15%);
  color: var(--surface);
  background: var(--ink-2);
}

.case-art { width: 180px; height: 135px; margin: 0; overflow: hidden; border: 7px solid var(--paper); box-shadow: 0 8px 24px rgb(0 0 0 / 22%); transform: rotate(-.35deg); }
.case-art img { width: 100%; height: 100%; display: block; object-fit: cover; }

.eyebrow { margin: 0 0 .45rem; color: var(--amber); font-size: .7rem; font-weight: 850; letter-spacing: .16em; text-transform: uppercase; }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 18ch; margin-bottom: 0; font: 700 clamp(2.2rem, 3.2vw, 3.45rem)/.94 var(--display); letter-spacing: -.035em; }
.case-setup { display: none; max-width: 54ch; margin-bottom: 0; color: rgb(243 239 229 / 66%); font-size: .88rem; }

.game-goal { min-height: 110px; display: grid; align-content: center; gap: .5rem; padding-left: clamp(1.5rem, 4vw, 4rem); border-left: 1px solid rgb(243 239 229 / 18%); }
.game-goal span { color: var(--amber); font-size: .68rem; font-weight: 850; letter-spacing: .16em; text-transform: uppercase; }
.case-bar .eyebrow, .case-bar .game-goal span { color: var(--surface); }
.game-goal strong { max-width: 28ch; font: 700 clamp(1.45rem, 2.4vw, 2.35rem)/1.15 var(--display); }

.game-board {
  min-height: 660px;
  display: grid;
  grid-template-columns: minmax(270px, 25%) minmax(0, 75%);
  border-bottom: 1px solid rgb(243 239 229 / 14%);
}

.clue-rail { color: var(--ink); background: var(--paper); border-right: 1px solid rgb(58 44 53 / 22%); }
.rail-heading { min-height: 80px; display: flex; align-items: center; justify-content: space-between; padding: 1rem clamp(1rem, 2.8vw, 2.5rem); border-bottom: 1px solid rgb(58 44 53 / 18%); }
.rail-heading > div { display: flex; align-items: center; gap: .75rem; }
.rail-heading h2 { margin: 0; font: 700 1.65rem var(--display); }
.rail-icon { color: var(--amber); font-size: 1.35rem; }
.clue-toggle { display: none; min-height: 44px; border: 0; color: var(--ink); background: transparent; font-weight: 800; text-decoration: underline; text-underline-offset: 4px; }

.case-grid-page .clue-body { display: none; }
.case-grid-page .clue-body.is-open { display: block; }
.clue-body { padding: 0 clamp(1rem, 2.8vw, 2.5rem) 1.4rem; }
.clue-body > p { margin: 1rem 0 .4rem; color: var(--moss-dark); font-size: .78rem; }
.clue-list { margin: 0; padding: 0; list-style: none; }
.clue-list li { display: grid; grid-template-columns: 2rem 1fr; gap: .65rem; padding: .8rem 0; border-top: 1px solid rgb(58 44 53 / 14%); }
.clue-list li > span { padding-top: .1rem; color: var(--amber); font-size: .7rem; font-weight: 850; }
.clue-list p { margin: 0; font-size: clamp(.78rem, 1vw, .94rem); line-height: 1.42; }
.hint-region { margin-top: .6rem; padding: .85rem 0 0; border-top: 1px solid rgb(58 44 53 / 18%); }
.hint-region p { margin: 0 0 .35rem; color: var(--moss-dark); font-size: .78rem; }
.hint-region strong { color: var(--ink); }

.chain-panel { position: relative; padding: 1rem clamp(1rem, 3vw, 3rem) 1.25rem; color: var(--surface); background: var(--ink); }
.chain-heading { min-height: 64px; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.chain-heading h2 { display: flex; align-items: center; gap: .6rem; margin: 0; font: 700 clamp(1.45rem, 2.3vw, 2rem) var(--display); }
.chain-heading h2 i { color: var(--amber); }
.reset-button { min-height: 44px; border: 0; color: rgb(243 239 229 / 72%); background: transparent; font-weight: 750; text-decoration: underline; text-underline-offset: 4px; cursor: pointer; }

.sortable-chain { display: grid; gap: .48rem; }
.event-row { min-height: 76px; display: grid; grid-template-columns: 58px minmax(0, 1fr) 92px; align-items: stretch; overflow: hidden; border: 1px solid rgb(243 239 229 / 22%); border-radius: 7px; color: var(--ink); background: var(--paper); box-shadow: var(--shadow-row); transition: transform .16s ease, border-color .16s ease, box-shadow .16s ease; }
.event-row:hover { transform: translateY(-1px); border-color: var(--brand); }
.event-row.is-selected { border: 2px solid var(--selection-border); background: var(--selection); box-shadow: 0 0 0 3px rgb(198 74 101 / 12%), var(--shadow-row); }
.event-row.is-correct { border-color: var(--amber); }
.event-row.is-coached { border-color: var(--brand); box-shadow: 0 0 0 2px rgb(198 74 101 / 14%), var(--shadow-row); }
.event-position { display: grid; place-items: center; color: var(--paper); background: var(--moss-dark); font: 700 2rem var(--display); }
.is-selected .event-position, .is-correct .event-position { background: var(--amber); }

.event-select { min-width: 0; display: grid; grid-template-columns: 52px minmax(0, 1fr); align-items: center; gap: .85rem; padding: .55rem 1rem; border: 0; color: var(--ink); background: transparent; text-align: left; cursor: pointer; }
.event-icon { display: grid; place-items: center; color: var(--moss-dark); font-size: 1.7rem; }
.event-copy { min-width: 0; display: grid; gap: .12rem; }
.event-copy strong { overflow: hidden; font: 700 clamp(.95rem, 1.4vw, 1.14rem) var(--display); text-overflow: ellipsis; white-space: nowrap; }
.event-copy small { overflow: hidden; color: var(--moss-dark); font-size: .72rem; text-overflow: ellipsis; white-space: nowrap; }
.event-coach { color: var(--amber); font-size: .68rem; font-weight: 850; letter-spacing: .04em; text-transform: uppercase; }
.event-row.is-coached .event-copy small { display: none; }

.move-actions { display: grid; grid-template-columns: repeat(2, 42px); align-items: center; gap: .35rem; padding-right: .7rem; }
.move-actions button { width: 42px; min-height: 44px; border: 1px solid rgb(58 44 53 / 22%); border-radius: 5px; color: var(--ink); background: var(--sheet); cursor: pointer; }
.move-actions button:hover:not(:disabled) { border-color: var(--amber); color: var(--amber); }
.move-actions button:disabled { opacity: .26; cursor: not-allowed; }

.chain-footer { min-height: 74px; display: flex; align-items: center; justify-content: center; padding-top: .8rem; }
.chain-footer > p { margin: 0; color: rgb(243 239 229 / 68%); font-size: .8rem; }
.mobile-actions { display: none; }

.resolution { margin: 0; padding: clamp(3rem, 8vw, 7rem) clamp(1rem, 8vw, 8rem); color: var(--ink); background: var(--paper); border-top: 4px solid var(--amber); }
.resolution h2 { max-width: 15ch; margin-bottom: 1.2rem; font: 700 clamp(2.7rem, 7vw, 6rem)/.95 var(--display); }
.resolution > p:not(.eyebrow) { max-width: 62ch; color: var(--moss-dark); font-size: 1.05rem; }
.result-line { margin: 1.5rem 0; font-weight: 800; }
.resolution-actions { display: flex; flex-wrap: wrap; gap: .75rem; }
.resolution .secondary-button { border-color: var(--ink); color: var(--ink); }

.archive-game .case-bar { grid-template-columns: minmax(0, 1.35fr) minmax(300px, .65fr); }

/* Evidence Chain M4 surface. Case Grid keeps its existing rules until its own pass. */
.case-bar.evidence-casebar {
  min-height: 0;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, .9fr);
  align-items: stretch;
  gap: clamp(2rem, 5vw, 5rem);
  padding: clamp(2rem, 5vw, 4.5rem) clamp(1rem, 7vw, 7rem);
  border-bottom: 0;
  color: var(--ink);
  background: var(--surface);
}
.evidence-casebar .case-copy { display: grid; align-content: center; gap: 1.5rem; }
.evidence-casebar .eyebrow { color: var(--coral-accessible); }
.evidence-casebar h1 {
  max-width: 16ch;
  margin-bottom: .8rem;
  font: 700 clamp(46px, 6vw, 76px)/.98 var(--display);
  letter-spacing: -.035em;
}
.evidence-casebar .case-setup {
  max-width: 54ch;
  display: block;
  margin-bottom: 0;
  color: var(--muted-ink);
  font-size: 16px;
  line-height: 1.6;
}
.evidence-casebar .game-goal {
  min-height: 96px;
  display: grid;
  align-content: center;
  gap: .4rem;
  padding: 1rem 1.2rem;
  border: 1px solid var(--butter-border);
  border-radius: 12px;
  color: var(--butter-deep);
  background: var(--soft-butter);
}
.evidence-casebar .game-goal span { color: var(--butter-deep); }
.evidence-casebar .game-goal strong { max-width: 34ch; font: 700 18px/1.35 var(--sans); }
.evidence-casebar .case-art {
  width: 100%;
  height: auto;
  min-height: 280px;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--decorative-border);
  border-radius: 16px;
  box-shadow: var(--panel-shadow);
  transform: none;
}

#game-board {
  min-height: 660px;
  display: grid;
  grid-template-columns: minmax(280px, .32fr) minmax(0, .68fr);
  grid-template-areas: "clues chain";
  gap: clamp(1rem, 2.5vw, 2rem);
  padding: clamp(1.5rem, 3.5vw, 3rem) clamp(1rem, 5vw, 5rem);
  border-bottom: 0;
  background: var(--page-blush);
}
#game-board .chain-panel {
  grid-area: chain;
  min-width: 0;
  padding: 1rem clamp(1rem, 2.5vw, 2rem) 1.4rem;
  border: 1px solid var(--decorative-border);
  border-radius: 16px;
  color: var(--ink);
  background: var(--surface);
}
#game-board .clue-rail {
  grid-area: clues;
  align-self: start;
  overflow: hidden;
  border: 1px solid var(--decorative-border);
  border-radius: 14px;
  color: var(--ink);
  background: var(--brand-soft);
  box-shadow: var(--panel-shadow);
}
#game-board .rail-heading { min-height: 76px; border-bottom: 1px solid var(--decorative-border); }
#game-board .rail-heading h2 { font: 700 28px/1 var(--display); }
#game-board .rail-icon { color: var(--brand); }
#game-board .clue-body > p,
#game-board .hint-region p { color: var(--muted-ink); font-size: 14px; line-height: 1.6; }
#game-board .clue-list li {
  grid-template-columns: 34px minmax(0, 1fr);
  gap: .75rem;
  padding: .85rem 0;
  border-top: 1px solid var(--decorative-border);
}
#game-board .clue-list li > span {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  padding: 0;
  border-radius: 8px;
  color: var(--surface);
  background: var(--brand);
  font: 600 12px/1 var(--mono);
}
#game-board .clue-list p { margin: 0; font-size: 14px; line-height: 1.6; }
#game-board .hint-region { border-top: 1px solid var(--decorative-border); }
#game-board .chain-heading { min-height: 74px; }
#game-board .chain-heading h2 { font: 700 clamp(26px, 2.3vw, 30px)/1.1 var(--display); }
#game-board .chain-heading h2 i { color: var(--coral-accessible); }
#game-board .chain-tools { display: flex; align-items: center; gap: .5rem; }
#game-board .clue-toggle { display: none; }
#game-board .reset-button {
  min-height: 44px;
  padding: .5rem .7rem;
  border: 1px solid var(--decorative-border);
  border-radius: 8px;
  color: var(--ink);
  background: var(--surface);
  text-decoration: none;
}
#game-board .sortable-chain { gap: 14px; padding-bottom: 7px; }
#game-board .event-row {
  min-height: 78px;
  grid-template-columns: 64px minmax(0, 1fr) 116px;
  overflow: hidden;
  border: 1px solid var(--decorative-border);
  border-radius: 10px;
  color: var(--ink);
  background: var(--surface);
  box-shadow: var(--panel-shadow);
}
#game-board .event-row:focus-within { outline: 3px solid var(--brand-strong); outline-offset: 2px; }
#game-board .event-row:hover { border-color: var(--brand); transform: translateY(-1px); }
#game-board .event-row.is-selected {
  border: 2px solid var(--selection-border);
  background: var(--selection);
  box-shadow: 0 0 0 3px rgb(198 74 101 / 12%);
}
#game-board .event-row.is-correct {
  border-color: var(--verified-mint-border);
  background: var(--soft-mint);
}
#game-board .event-position {
  min-width: 64px;
  color: var(--surface);
  background: var(--brand);
  font: 900 22px/1 var(--display);
}
#game-board .event-row.is-correct .event-position { color: var(--ink); background: var(--mint); }
#game-board .event-select { grid-template-columns: 46px minmax(0, 1fr); padding: .55rem .8rem; }
#game-board .event-icon { color: var(--muted-ink); font-size: 24px; }
#game-board .event-copy { gap: .14rem; }
#game-board .event-copy strong { font: 700 clamp(17px, 1.5vw, 18px)/1.25 var(--display); }
#game-board .event-copy small { color: var(--muted-ink); font-size: 14px; }
#game-board .event-confirmed {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  color: var(--mint-deep);
  font-size: 14px;
  font-weight: 800;
}
#game-board .event-confirmed i { font-size: 22px; font-weight: 900; }
#game-board .move-actions { grid-template-columns: repeat(2, 48px); gap: 8px; padding-right: 12px; }
#game-board .move-actions button {
  width: 48px;
  min-height: 48px;
  border: 1px solid var(--decorative-border);
  border-radius: 8px;
  color: var(--ink);
  background: var(--surface);
}
#game-board .move-icon { width: 24px; height: 24px; fill: none; stroke: currentColor; stroke-width: 2.8; stroke-linecap: round; stroke-linejoin: round; }
#game-board .move-actions button:hover:not(:disabled) { border-color: var(--brand); color: var(--brand); background: var(--brand-soft); }
#game-board .chain-footer { min-height: 82px; }
#game-board .chain-footer > p { color: var(--muted-ink); font-size: 14px; }
#game-board.is-solved .chain-panel { border-color: var(--verified-mint-border); }

.archive-game .case-setup { display: block; }
.case-record { padding: clamp(3.5rem, 8vw, 7rem) clamp(1rem, 8vw, 8rem); color: var(--ink); background: var(--page-blush); }
.case-record > h2 { max-width: 18ch; margin-bottom: 1rem; font: 700 clamp(2.4rem, 6vw, 5rem)/1 var(--display); }
.case-record > p:not(.eyebrow) { max-width: 66ch; color: var(--muted-ink); font-size: 16px; line-height: 1.65; }
.case-record-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(2rem, 6vw, 6rem); }
.case-record-grid section { margin-top: 2.5rem; }
.case-record-grid h3 { margin-bottom: 0; font: 700 clamp(1.35rem, 3vw, 2rem) var(--display); }
.archive-game-nav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; margin-top: 2rem; }
.archive-game-nav a { min-height: 48px; display: flex; align-items: center; color: var(--ink); font-weight: 800; text-underline-offset: 4px; }
.archive-game-nav a:last-child { justify-content: flex-end; text-align: right; }

.how-it-works { padding: clamp(3.5rem, 8vw, 7rem) clamp(1rem, 8vw, 8rem); color: var(--ink); background: var(--surface); }
.how-it-works h2 { margin-bottom: 2rem; font: 700 clamp(2.2rem, 6vw, 5rem)/1 var(--display); }
.rules { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.rules p { padding-top: 1rem; border-top: 2px solid var(--decorative-border); color: var(--muted-ink); font-size: 16px; line-height: 1.6; }
.rules strong { color: var(--ink); }
.alternate-game { margin: 2rem 0 0; padding-top: 1.2rem; border-top: 2px solid var(--decorative-border); color: var(--muted-ink); font-size: 16px; }
.alternate-game a { color: var(--ink); font-weight: 850; }

.case-grid-page .case-grid-casebar {
  min-height: 0;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, .65fr);
  gap: clamp(1.5rem, 4vw, 4rem);
  padding: 1.5rem clamp(1rem, 4vw, 4rem);
  border-bottom: 0;
  color: var(--ink);
  background: var(--page-blush);
}
.case-grid-page .case-identity {
  min-width: 0;
  display: grid;
  grid-template-columns: minmax(160px, .42fr) minmax(0, 1fr);
  grid-template-rows: auto auto 1fr;
  align-items: center;
  column-gap: clamp(1rem, 2.5vw, 2rem);
}
.case-grid-page .case-grid-art {
  grid-row: 1 / 4;
  width: 100%;
  aspect-ratio: 3 / 2;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--decorative-border);
  border-radius: 14px;
  background: var(--surface);
  box-shadow: var(--panel-shadow);
}
.case-grid-page .case-grid-art img { width: 100%; height: 100%; display: block; object-fit: cover; }
.case-grid-page .case-identity > .eyebrow { color: var(--lavender-deep); }
.case-grid-page .case-grid-casebar h1 {
  max-width: 16ch;
  margin-bottom: .5rem;
  font: 700 clamp(34px, 3.5vw, 52px)/1 var(--display);
  text-wrap: balance;
}
.case-grid-page .case-setup { display: block; max-width: 58ch; color: var(--muted-ink); font-size: 16px; line-height: 1.55; }
.case-grid-page .case-grid-casebar .game-goal {
  min-height: 104px;
  padding: 1rem 1.2rem;
  border: 1px solid var(--butter-border);
  border-radius: 12px;
  color: var(--butter-deep);
  background: var(--soft-butter);
}
.case-grid-page .case-grid-casebar .game-goal span { color: var(--butter-deep); }
.case-grid-page .case-grid-casebar .game-goal strong { font: 700 18px/1.35 var(--sans); }
.case-grid-page .case-grid-board {
  grid-template-columns: minmax(280px, 24fr) minmax(0, 76fr);
  gap: clamp(1rem, 2.5vw, 2rem);
  padding: clamp(1.5rem, 3vw, 2.5rem) clamp(1rem, 4vw, 4rem);
  border-bottom: 0;
  background: var(--page-blush);
}
.case-grid-page .case-grid-track { grid-template-columns: repeat(4, 1fr); }
.case-grid-page .case-grid-dossier {
  position: relative;
  align-self: start;
  overflow: hidden;
  border: 1px solid var(--decorative-border);
  border-radius: 14px;
  color: var(--ink);
  background: var(--brand-soft);
  box-shadow: var(--panel-shadow);
}
.case-grid-page .case-grid-dossier .rail-heading { min-height: 76px; border-bottom: 1px solid var(--decorative-border); }
.case-grid-page .case-grid-dossier .rail-icon { color: var(--brand); }
.case-grid-page .case-grid-dossier .clue-toggle { min-height: 44px; display: block; }
.case-grid-page .case-grid-dossier .clue-list li { grid-template-columns: 2.15rem 1fr; padding: .82rem 0; }
.case-grid-page .case-grid-dossier .clue-list li > span {
  width: 1.7rem;
  height: 1.7rem;
  display: grid;
  place-items: center;
  padding: 0;
  border-radius: 8px;
  color: var(--sheet);
  background: var(--brand);
  font: 600 .68rem/1 var(--mono);
}
.case-grid-page .case-grid-dossier .clue-list li { border-top-color: var(--decorative-border); }
.case-grid-page .case-grid-dossier .clue-body > p { font-size: 14px; line-height: 1.6; }
.case-grid-page .case-grid-dossier .clue-list p { font-size: 14px; line-height: 1.6; }
.case-grid-page .case-grid-dossier .hint-region p { font-size: 14px; line-height: 1.6; }
.case-grid-page .case-grid-dossier .hint-region { margin-top: 1rem; padding-top: 1rem; border-top: 1px solid var(--decorative-border); }
.case-grid-page .case-grid-evidence-desk {
  min-width: 0;
  padding: 1rem clamp(1rem, 2.5vw, 2.5rem) 1.5rem;
  border: 1px solid var(--decorative-border);
  border-radius: 16px;
  color: var(--ink);
  background: var(--surface);
}
.case-grid-page .case-grid-heading { min-height: 62px; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.case-grid-page .case-grid-heading h2 { display: flex; align-items: center; gap: .6rem; margin: 0; font: 700 clamp(1.45rem, 2.3vw, 2rem) var(--display); }
.case-grid-page .case-grid-heading h2 i { color: var(--lavender-deep); }
.case-grid-page .case-grid-secondary-actions { display: flex; align-items: center; gap: 1rem; }
.case-grid-page .case-grid-secondary-actions a { min-height: 44px; display: inline-flex; align-items: center; color: var(--muted-ink); font-size: .8rem; font-weight: 800; }
.case-grid-page .case-grid-secondary-actions .reset-button {
  min-height: 44px;
  padding: .45rem .65rem;
  border: 1px solid var(--decorative-border);
  border-radius: 8px;
  color: var(--ink);
  background: var(--surface);
  text-decoration: none;
}
.case-grid-page .case-grid-secondary-actions .undo-button {
  min-height: 44px;
  padding: .45rem .65rem;
  border: 1px solid var(--lavender-deep);
  border-radius: 8px;
  color: var(--lavender-deep);
  background: var(--soft-lavender);
  font-weight: 800;
}
.case-grid-page .case-grid-secondary-actions .undo-button:disabled { border-color: var(--decorative-border); color: var(--muted-ink); background: var(--sheet); cursor: not-allowed; opacity: .62; }
.case-grid-page .case-grid-marking-bar { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin: .35rem 0 1rem; }
.case-grid-page .mark-mode { display: inline-flex; align-items: center; gap: .3rem; padding: .3rem; border: 1px solid var(--decorative-border); border-radius: 11px; background: var(--sheet); }
.case-grid-page .mark-mode-label { padding: 0 .5rem; color: var(--muted-ink); font-size: .76rem; font-weight: 900; letter-spacing: .03em; text-transform: uppercase; }
.case-grid-page .mark-mode-button {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .45rem .8rem;
  border: 2px solid transparent;
  border-radius: 8px;
  color: var(--muted-ink);
  background: transparent;
  font-weight: 900;
  transition: color .15s ease, background .15s ease, border-color .15s ease;
}
.case-grid-page .mark-mode-button i { font-size: 1.15rem; font-weight: 900; }
.case-grid-page #case-grid-mode-exclude.is-active { border-color: var(--excluded-rose-border); color: var(--excluded-ink); background: var(--soft-rose); }
.case-grid-page #case-grid-mode-confirm.is-active { border-color: var(--verified-mint-border); color: var(--mint-deep); background: var(--soft-mint); }
.case-grid-page .automatic-note { display: inline-flex; align-items: center; gap: .45rem; margin: 0; color: var(--muted-ink); font-size: .78rem; font-weight: 800; }
.case-grid-page .matrix-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.case-grid-page .logic-matrix {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--decorative-border);
  border-radius: 12px;
  color: var(--ink);
  background: var(--surface);
  box-shadow: var(--panel-shadow);
}
.case-grid-page .logic-matrix:last-child { grid-column: 1 / -1; width: calc(50% - .5rem); justify-self: center; }
.case-grid-page .logic-matrix h3 {
  min-height: 48px;
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr) auto;
  align-items: center;
  gap: .55rem;
  margin: 0;
  padding: .65rem .75rem;
  border-bottom: 1px solid var(--decorative-border);
  font: 700 .95rem var(--display);
}
.case-grid-page .matrix-index { color: var(--lavender-deep); font: 600 .68rem var(--mono); letter-spacing: .08em; }
.case-grid-page .matrix-status { color: var(--muted-ink); font: 800 .68rem var(--sans); letter-spacing: .045em; text-transform: uppercase; }
.case-grid-page .logic-matrix table { width: 100%; table-layout: fixed; border-collapse: collapse; }
.case-grid-page .logic-matrix th,
.case-grid-page .logic-matrix td { overflow-wrap: anywhere; border-right: 1px solid var(--decorative-border); border-bottom: 1px solid var(--decorative-border); }
.case-grid-page .logic-matrix tr > :last-child { border-right: 0; }
.case-grid-page .logic-matrix tbody tr:last-child > * { border-bottom: 0; }
.case-grid-page .logic-matrix thead th { height: 62px; padding: .45rem .3rem; color: var(--muted-ink); font-size: .75rem; font-weight: 800; line-height: 1.18; text-align: center; vertical-align: bottom; }
.case-grid-page .logic-matrix thead th:first-child { width: 32%; }
.case-grid-page .logic-matrix tbody th { padding: .6rem .65rem; font-family: var(--sans); font-size: .81rem; font-weight: 800; line-height: 1.2; text-align: left; }
.case-grid-page .logic-matrix td { padding: 0; background: var(--sheet); }
.case-grid-page .grid-cell {
  position: relative;
  width: 100%;
  min-height: 44px;
  display: grid;
  place-items: center;
  padding: 0;
  border: 2px solid transparent;
  color: var(--ink);
  background: var(--surface);
  font-size: 22px;
  font-weight: 900;
  cursor: pointer;
  transition: color .15s ease, background .15s ease, border-color .15s ease, transform .15s ease, box-shadow .15s ease;
}
.case-grid-page .grid-cell:hover:not(:disabled) { border-color: var(--brand); color: var(--brand-strong); background: var(--brand-soft); }
.case-grid-page .grid-cell:active:not(:disabled) { transform: scale(.95); }
.case-grid-page .grid-cell:focus-visible { outline: 3px solid var(--nav-accent-strong); outline-offset: -3px; }
.case-grid-page .grid-cell.is-excluded { border-color: var(--excluded-rose-border); color: var(--excluded-ink); background: var(--soft-rose); }
.case-grid-page .grid-cell.is-confirmed { border-color: var(--mint-deep); color: white; background: var(--mint-deep); }
.case-grid-page .grid-cell.is-confirmed.source-explicit {
  border-color: var(--mint-deep);
  color: white;
  background: var(--mint-deep);
  box-shadow: inset 0 -3px 0 rgb(16 70 56 / 42%), 0 3px 8px rgb(40 107 88 / 18%);
}
.case-grid-page .grid-cell.is-confirmed.source-explicit:hover:not(:disabled) {
  border-color: #225f50;
  color: white;
  background: #225f50;
}
.case-grid-page .grid-cell.source-derived { box-shadow: inset 0 0 0 1px rgb(138 116 132 / 14%); }
.case-grid-page .grid-cell.source-derived.is-excluded { border-color: #e9cfd6; color: #a8455a; background: #fff8fa; }
.case-grid-page .grid-cell.source-derived.is-confirmed {
  border-color: var(--mint-deep);
  color: white;
  background: var(--mint-deep);
  box-shadow: inset 0 -3px 0 rgb(16 70 56 / 42%), 0 2px 6px rgb(40 107 88 / 14%);
}
.case-grid-page .grid-cell.source-derived:not(:disabled) { cursor: help; }
.case-grid-page .grid-cell.is-verified.is-confirmed { border-color: var(--verified-mint-border); color: var(--mint-deep); background: var(--soft-mint); }
.case-grid-page .grid-cell.is-newly-derived { animation: case-grid-derived 220ms ease-out; }
.case-grid-page .grid-cell.is-source-premise { animation: case-grid-source 700ms ease-out; }
.case-grid-page .grid-cell:disabled { cursor: not-allowed; opacity: 1; }
.case-grid-page .case-grid-footer { min-height: 78px; display: grid; align-content: center; justify-items: center; padding-top: .8rem; }
.case-grid-page .case-grid-footer > p.is-contradiction {
  padding: .65rem .85rem;
  border: 2px solid var(--contradiction);
  border-radius: 10px;
  color: var(--contradiction);
  background: var(--soft-contradiction);
}
.case-grid-page .case-grid-footer > p.is-contradiction .contradiction-icon { display: inline-block; }
.case-grid-page .case-grid-footer > p.has-contradiction { animation: case-grid-contradiction 220ms ease-out; }
.case-grid-page .contradiction-icon { display: none; font-size: 1.25rem; }
.case-grid-page .case-grid-footer > p { display: inline-flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: .45rem .7rem; margin: 0; color: var(--muted-ink); font-size: 14px; text-align: center; }
.case-grid-page .message-action {
  min-height: 40px;
  padding: .4rem .7rem;
  border: 1px solid currentColor;
  border-radius: 8px;
  color: inherit;
  background: var(--surface);
  font-weight: 900;
}
.case-grid-page .message-action:hover { background: var(--soft-lavender); }
.case-grid-page .case-grid-footer .mobile-actions { width: 100%; }
.case-grid-page .resolution { border-top-color: var(--verified-mint-border); background: var(--soft-mint); }
.case-grid-page .resolution:not([hidden]) { animation: case-grid-resolution 300ms ease-out both; }

@keyframes case-grid-derived {
  0% { box-shadow: inset 0 0 0 0 rgb(198 74 101 / 0%); transform: scale(.96); }
  55% { box-shadow: inset 0 0 0 3px rgb(198 74 101 / 24%); }
  100% { transform: scale(1); }
}

@keyframes case-grid-source {
  0%, 100% { box-shadow: inset 0 0 0 1px var(--derived-border); }
  40% { box-shadow: inset 0 0 0 4px rgb(107 76 194 / 42%); }
}

@keyframes case-grid-contradiction {
  0%, 100% { transform: translateX(0); }
  35% { transform: translateX(-5px); }
  70% { transform: translateX(5px); }
}

@keyframes case-grid-resolution {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}

footer { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 2rem; padding: 2rem clamp(1rem, 4vw, 4rem); border-top: 2px solid var(--decorative-border); color: var(--muted-ink); background: var(--page-blush); font-size: 14px; }
.footer-tagline { margin: 0; color: var(--ink); font-weight: 800; }
.footer-groups { display: grid; grid-template-columns: repeat(2, minmax(150px, auto)); gap: clamp(2rem, 5vw, 4rem); }
.footer-group { display: grid; align-content: start; gap: .55rem; }
.footer-group strong { margin-bottom: .2rem; color: var(--ink); font: 700 17px var(--display); }
.footer-group a { min-height: 44px; display: flex; align-items: center; font-weight: 700; }

.editorial-page { width: min(100%, 1040px); min-height: calc(100svh - 170px); margin: 0 auto; padding: clamp(2rem, 6vw, 5rem) clamp(1rem, 4vw, 3rem); color: var(--ink); background: var(--page-blush); }
.editorial-page article { padding: clamp(1.5rem, 5vw, 4rem); border: 1px solid var(--decorative-border); border-radius: 20px; background: var(--surface); box-shadow: var(--panel-shadow); }
.editorial-page article > h1 { max-width: 14ch; font: 700 clamp(3rem, 9vw, 6.5rem)/1 var(--display); }
.editorial-page article p { font-size: 16px; line-height: 1.65; }
.article-lede { max-width: 60ch; margin-bottom: 2rem; color: var(--muted-ink); font-size: clamp(1.05rem, 2.5vw, 1.3rem); }
.editorial-page section { margin-top: clamp(3rem, 7vw, 5rem); }
.editorial-page h2 { font: 700 clamp(1.8rem, 5vw, 3rem) var(--display); }
.editorial-page section p { max-width: 68ch; color: var(--muted-ink); }
.inline-action { width: max-content; margin-top: .5rem; }
.archive-switcher {
  display: flex;
  flex-wrap: wrap;
  gap: .65rem;
  margin: 2rem 0 .5rem;
  font-size: 15px;
  font-weight: 800;
}
.archive-switcher a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding: .65rem .9rem;
  border: 1px solid var(--decorative-border);
  border-radius: 10px;
  color: var(--muted-ink);
  background: var(--surface);
  text-decoration: none;
}
.archive-switcher a:hover { border-color: var(--control-border); color: var(--ink); }
.archive-switcher a[aria-current='page'] {
  border-color: var(--nav-accent);
  color: var(--nav-accent-strong);
  background: var(--nav-soft);
}
.archive-list, .archive-evidence, .article-clues { margin: 2rem 0 0; padding: 0; list-style: none; }
.archive-list { display: grid; gap: 1.25rem; }
.archive-list li { border: 0; }
.archive-list a { display: grid; grid-template-columns: minmax(160px, 220px) minmax(0, 1fr); gap: 1.25rem; padding: 1rem; border: 1px solid var(--decorative-border); border-radius: 14px; background: var(--surface); box-shadow: var(--panel-shadow); text-decoration: none; transition: transform 160ms ease, border-color 160ms ease; }
.archive-list a:hover { border-color: var(--control-border); transform: translateY(-2px); }
.archive-list img { width: 100%; height: auto; aspect-ratio: 3 / 2; border: 1px solid var(--decorative-border); border-radius: 10px; object-fit: cover; }
.archive-card-copy { display: grid; align-content: center; gap: .4rem; max-width: 62ch; color: var(--muted-ink); font-family: var(--sans); }
.archive-list time { color: var(--coral-deep); font: 600 14px var(--mono); }
.archive-list strong { color: var(--ink); font: 700 1.35rem var(--display); }
.archive-card-copy > span { color: var(--muted-ink); font-size: 15px; line-height: 1.6; }
.archive-evidence li, .article-clues li { border-top: 2px solid var(--decorative-border); }
.archive-evidence li { display: grid; gap: .25rem; padding: 1rem 0; }
.archive-evidence span { color: var(--muted-ink); font-size: 14px; line-height: 1.6; }
.article-clues { counter-reset: article-clues; }
.article-clues li { counter-increment: article-clues; display: grid; grid-template-columns: 2rem 1fr; gap: 1rem; padding: 1rem 0; }
.article-clues li::before { content: counter(article-clues, decimal-leading-zero); color: var(--coral-deep); font: 600 14px var(--mono); }
details { margin-top: 3rem; padding: 1.3rem 0; border-top: 2px solid var(--control-border); border-bottom: 2px solid var(--control-border); }
summary { min-height: 44px; font-weight: 800; cursor: pointer; }

@media (max-width: 1050px) {
  .site-header { grid-template-columns: auto minmax(0, 1fr); }
  .site-header .wordmark { grid-column: 1; grid-row: 1; }
  .site-header nav { grid-column: 1 / -1; grid-row: 2; display: flex; overflow-x: auto; padding-top: .5rem; border-top: 1px solid var(--decorative-border); white-space: nowrap; }
  .case-bar { grid-template-columns: 150px minmax(300px, 1fr) minmax(250px, .8fr); }
  .case-art { width: 150px; height: 120px; }
  .event-row { grid-template-columns: 50px minmax(0, 1fr) 88px; }
  .matrix-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .logic-matrix:last-child { grid-column: 1 / -1; width: calc(50% - .5rem); justify-self: center; }
}

@media (min-width: 761px) and (max-width: 1050px) {
  .case-grid-page .case-grid-board { width: 100%; grid-template-columns: 1fr; }
  .case-grid-page .case-grid-dossier { grid-column: 1 / -1; box-shadow: var(--panel-shadow); }
  .case-grid-page .case-grid-dossier .clue-body { columns: 2; column-gap: 2rem; }
  .case-grid-page .case-grid-dossier .clue-list,
  .case-grid-page .case-grid-dossier .hint-region { break-inside: avoid; }
  .case-grid-page .matrix-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .case-grid-page .logic-matrix:last-child { grid-column: 1 / -1; width: calc(50% - .5rem); justify-self: center; }
}

@media (min-width: 760.01px) and (max-width: 1050px) {
  #game-board { min-height: 0; width: 100%; display: block; }
  #game-board .chain-panel { width: 100%; }
  #game-board .clue-rail { width: 100%; margin-top: 1.5rem; }
  #game-board .event-copy strong { overflow: visible; text-overflow: clip; white-space: normal; }
}

@media (max-width: 760px) {
  body { overflow-x: clip; }
  .site-header { position: sticky; top: 0; z-index: 20; grid-template-columns: 1fr; min-height: 76px; padding: .65rem 1rem; }
  .wordmark { font-size: 29px; }
  .site-header nav { grid-column: 1; grid-row: 2; justify-self: stretch; display: flex; gap: 24px; overflow-x: auto; padding-top: .45rem; border-top: 1px solid var(--decorative-border); font-size: 15px; font-weight: 800; white-space: nowrap; }
  .play-statusbar { grid-template-columns: minmax(0, 1fr) auto; gap: .75rem; padding: .7rem .75rem; }
  .play-statusbar .play-actions .hint-button,
  .play-statusbar .play-actions .primary-button { display: none; }
  .play-actions { gap: 0; }
  .timer { min-width: 66px; font-size: .82rem; }

  .case-bar { min-height: 140px; grid-template-columns: 84px 1fr; gap: 1rem; padding: 1rem; }
  .case-art { width: 84px; height: 84px; border-width: 4px; }
  h1 { font-size: clamp(1.7rem, 8.5vw, 2.5rem); }
  .case-setup { display: none; }
  .game-goal { grid-column: 1 / -1; min-height: auto; padding: .8rem 0 0; border-top: 1px solid rgb(243 239 229 / 18%); border-left: 0; }
  .game-goal strong { font: 700 1rem var(--sans); }
  .archive-game .case-bar { grid-template-columns: 1fr; }
  .archive-game .case-setup { display: block; }
  .case-grid-page .case-grid-casebar { grid-template-columns: 1fr; gap: 1rem; padding: 1rem; }
  .case-grid-page .case-identity { grid-template-columns: 1fr; grid-template-rows: auto; gap: .5rem; }
  .case-grid-page .case-grid-art { grid-row: auto; width: 100%; max-height: 160px; aspect-ratio: 16 / 7; }
  .case-grid-page .case-grid-casebar h1 { overflow-wrap: anywhere; text-wrap: balance; }
  .case-grid-page .case-grid-casebar .game-goal { min-height: 0; padding: .85rem 1rem; }
  .case-grid-page .case-setup { display: block; }
  .case-grid-page .case-grid-board { display: flex; flex-direction: column; min-height: 0; }
  .case-grid-page .case-grid-dossier { order: 1; align-self: stretch; width: 100%; border: 1px solid var(--decorative-border); box-shadow: var(--panel-shadow); }
  .case-grid-page .case-grid-evidence-desk { order: 2; padding: .8rem 1rem 1.2rem; }
  .case-grid-page .matrix-grid { grid-template-columns: 1fr; }
  .case-grid-page .logic-matrix:last-child { grid-column: auto; width: 100%; }
  .case-grid-page .logic-matrix thead th { height: 50px; font-size: .56rem; }
  .case-grid-page .logic-matrix tbody th { font-size: .62rem; }
  .case-grid-page .case-grid-heading { min-height: 58px; }
  .case-grid-page .case-grid-heading .eyebrow { display: none; }
  .case-grid-page .case-grid-footer { min-height: 116px; gap: .8rem; }
  .case-grid-page.is-case-grid-active { padding-bottom: var(--case-grid-action-height, 0px); scroll-padding-bottom: var(--case-grid-action-height, 0px); }
  .case-grid-page #case-grid-mobile-actions {
    position: fixed;
    z-index: 30;
    right: 0;
    bottom: 0;
    left: 0;
    display: grid;
    grid-template-columns: .8fr 1.2fr;
    gap: .55rem;
    padding: .7rem 1rem;
    padding-bottom: calc(.7rem + env(safe-area-inset-bottom));
    border-top: 2px solid var(--decorative-border);
    background: rgb(255 248 251 / 97%);
    box-shadow: 0 -10px 24px rgb(120 70 92 / 12%);
  }
  .case-grid-page:not(.is-case-grid-active) #case-grid-mobile-actions { display: none; }

  .game-board { display: flex; flex-direction: column; min-height: 0; }
  .chain-panel { padding: .8rem 1rem 1rem; }
  .case-grid-workspace { order: 1; padding: .8rem 1rem 1rem; }
  .clue-rail { border-right: 0; border-top: 1px solid rgb(58 44 53 / 20%); }
  .case-grid-page .clue-rail { order: 1; border-top: 0; border-bottom: 1px solid rgb(58 44 53 / 20%); }
  .case-grid-page .case-grid-workspace { order: 2; }
  .rail-heading { min-height: 64px; }
  .clue-toggle { display: block; }
  .clue-body { display: none; }
  .clue-body.is-open { display: block; }
  .chain-heading { min-height: 58px; }
  .chain-heading .eyebrow { display: none; }
  .chain-heading h2 { font-size: 1.35rem; }
  .sortable-chain { gap: .4rem; }
  .event-row { min-height: 70px; grid-template-columns: 42px minmax(0, 1fr) 82px; }
  .event-position { font-size: 1.35rem; }
  .event-select { grid-template-columns: 32px minmax(0, 1fr); gap: .45rem; padding: .45rem .55rem; }
  .event-icon { font-size: 1.25rem; }
  .event-copy strong { font-size: .86rem; }
  .event-copy small { display: none; }
  .move-actions { grid-template-columns: repeat(2, 38px); gap: .22rem; padding-right: .35rem; }
  .move-actions button { width: 38px; min-height: 44px; }

  .chain-footer { display: grid; gap: .8rem; min-height: 110px; justify-items: stretch; }
  .chain-footer > p { text-align: center; }
  .mobile-actions { display: grid; grid-template-columns: .8fr 1.2fr; gap: .55rem; }
  .matrix-grid { grid-template-columns: 1fr; }
  .logic-matrix:last-child { grid-column: auto; width: 100%; }
  .logic-matrix thead th { height: 54px; font-size: .68rem; }
  .logic-matrix tbody th { font-size: .75rem; }
  .case-grid-heading { min-height: 58px; }
  .case-grid-page .case-grid-marking-bar { align-items: stretch; flex-direction: column; }
  .case-grid-page .mark-mode { width: 100%; display: grid; grid-template-columns: auto 1fr 1fr; }
  .case-grid-page .mark-mode-button { justify-content: center; padding-inline: .5rem; }
  .case-grid-page .automatic-note { padding-inline: .35rem; }
  .case-grid-heading .eyebrow { display: none; }
  .case-grid-footer { min-height: 116px; gap: .8rem; }
  .rules { grid-template-columns: 1fr; gap: .5rem; }
  .case-record-grid { grid-template-columns: 1fr; gap: 0; }
  .editorial-page { padding: 1rem; }
  .editorial-page article { padding: 1.25rem; border-radius: 14px; }
  .archive-list a { grid-template-columns: 1fr; }
  .footer-groups { width: 100%; grid-template-columns: 1fr 1fr; gap: 1.5rem; }

  .case-bar.evidence-casebar {
    min-height: 0;
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    padding: 1.25rem 1rem 1.5rem;
  }
  .evidence-casebar h1 { max-width: 100%; margin-bottom: .65rem; overflow-wrap: anywhere; font-size: clamp(46px, 12vw, 52px); text-wrap: balance; }
  .evidence-casebar .case-copy { gap: 1rem; }
  .evidence-casebar .game-goal { min-height: 82px; padding: .85rem 1rem; }
  .evidence-casebar .case-art { width: 100%; height: min(220px, 60vw); min-height: 0; max-height: 220px; }

  #game-board { min-height: 0; display: block; padding: 1rem; }
  #game-board .chain-panel { padding: .75rem .75rem 1rem; }
  #game-board .chain-heading { min-height: 64px; display: grid; grid-template-columns: 1fr; align-items: start; gap: .5rem; }
  #game-board .chain-heading h2 { font-size: 26px; }
  #game-board .chain-tools { align-items: stretch; justify-content: space-between; }
  #game-board .clue-toggle {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    padding: .45rem .65rem;
    border: 2px solid var(--lavender-deep);
    border-radius: 8px;
    color: var(--lavender-deep);
    background: var(--soft-lavender);
    text-decoration: none;
  }
  #game-board .reset-button { padding-inline: .55rem; }
  #game-board .sortable-chain { gap: 14px; }
  #game-board .event-row { min-height: 78px; grid-template-columns: 52px minmax(0, 1fr) 112px; }
  #game-board .event-position { min-width: 52px; font-size: 22px; }
  #game-board .event-select { grid-template-columns: 34px minmax(0, 1fr); gap: .45rem; padding: .45rem .55rem; }
  #game-board .event-icon { font-size: 22px; }
  #game-board .event-copy strong { overflow: visible; font-size: 17px; text-overflow: clip; white-space: normal; }
  #game-board .event-copy small { display: none; }
  #game-board .move-actions { grid-template-columns: repeat(2, 48px); gap: 6px; padding-right: 8px; }
  #game-board .move-actions button { width: 48px; min-height: 48px; }
  #game-board .chain-footer { min-height: 118px; }
  #game-board .clue-rail { margin-top: 1rem; border: 1px solid var(--decorative-border); }
  #game-board .clue-body { display: none; }
  #game-board .clue-body.is-open { display: block; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
  .event-row,
  .case-grid-page .grid-cell,
  .case-grid-page .is-newly-derived,
  .case-grid-page .has-contradiction,
  .case-grid-page .resolution,
  .archive-list a { transform: none !important; }
  .case-grid-page .grid-cell { transition: none !important; transform: none !important; }
  .case-grid-page .is-newly-derived,
  .case-grid-page .has-contradiction,
  .case-grid-page .resolution { animation: none !important; transform: none !important; }
}

/* Kakuro M4 surface. */
.kakuro-page {
  --kakuro-cell: clamp(44px, calc((100vw - 48px) / 7), 58px);
  --kakuro-controls-height: 0px;
  overscroll-behavior-y: contain;
}

.kakuro-page [hidden] { display: none !important; }

.kakuro-page .kakuro-casebar {
  width: 100%;
  min-height: 0;
  display: block;
  padding: clamp(1.25rem, 3vw, 2rem) clamp(1.5rem, 5vw, 4rem);
  border-bottom: 2px solid var(--decorative-border);
  color: var(--ink);
  background: var(--page-blush);
}

.kakuro-page .kakuro-casebar .case-identity {
  width: min(100%, 920px);
  display: grid;
  grid-template-columns: auto auto minmax(280px, 1fr);
  grid-template-rows: auto auto;
  align-items: center;
  gap: .25rem 1rem;
  margin: 0 auto;
}

.kakuro-page .kakuro-casebar .eyebrow {
  grid-column: 1 / 3;
  margin: 0;
  color: var(--coral-deep);
}

.kakuro-page .kakuro-casebar h1, .kakuro-page .kakuro-hint-panel h2, .kakuro-page .kakuro-solved h2 { font-family: var(--display); }

.kakuro-page .kakuro-casebar, .kakuro-page .kakuro-hint-panel, .kakuro-page .kakuro-controls, .kakuro-page #kakuro-status { font-family: var(--sans); }

.kakuro-page .kakuro-clue-cell, .kakuro-page .kakuro-cell-value, .kakuro-page .kakuro-cell-notes, .kakuro-page #kakuro-active-sums, .kakuro-page .kakuro-progress { font-family: var(--mono); }

.kakuro-page .kakuro-casebar h1 {
  grid-column: 1;
  grid-row: 2;
  margin: 0;
  font-size: clamp(38px, 5vw, 58px);
  line-height: 1;
}

.kakuro-page .kakuro-difficulty, .kakuro-page #kakuro-rule {
  background: var(--soft-butter);
}

.kakuro-page .kakuro-difficulty {
  grid-column: 2;
  grid-row: 2;
  width: max-content;
  margin: 0;
  padding: .35rem .65rem;
  border: 2px solid var(--butter-border);
  border-radius: 8px;
  color: var(--butter-deep);
  font: 800 14px/1.2 var(--sans);
}

.kakuro-page #kakuro-rule {
  grid-column: 3;
  grid-row: 1 / 3;
  max-width: 58ch;
  display: block;
  margin: 0;
  padding: .8rem 1rem;
  border: 2px solid var(--butter-border);
  border-radius: 10px;
  color: var(--butter-deep);
  font-size: 16px;
  line-height: 1.55;
}

.kakuro-page .kakuro-board {
  width: min(100%, 920px);
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 300px);
  grid-template-areas: "status status" "workspace hint" "workspace controls";
  grid-template-rows: auto auto auto;
  align-items: start;
  align-content: start;
  gap: 1rem 1.5rem;
  margin: 0 auto;
  padding: clamp(1.5rem, 4vw, 3rem);
  border: 0;
  background: var(--page-blush);
}

.kakuro-page .kakuro-play-status { grid-area: status; width: 100%; }

.kakuro-page .kakuro-workspace {
  grid-area: workspace;
  min-width: 0;
  display: grid;
  justify-items: center;
  align-content: start;
}

.kakuro-page .kakuro-grid {
  width: min(100%, calc(var(--kakuro-cell) * 7));
  max-width: calc(100vw - 48px);
  display: flex;
  flex-direction: column;
  filter: drop-shadow(0 12px 18px rgb(120 70 92 / 10%));
}

.kakuro-page .kakuro-row {
  display: grid;
  grid-template-columns: repeat(7, var(--kakuro-cell));
}

.kakuro-page .kakuro-cell {
  position: relative;
  width: var(--kakuro-cell);
  height: var(--kakuro-cell);
  overflow: hidden;
  border-right: 2px solid var(--kakuro-grid-line);
  border-bottom: 2px solid var(--kakuro-grid-line);
}

.kakuro-page .kakuro-row:first-child .kakuro-cell { border-top: 2px solid var(--kakuro-grid-line); }
.kakuro-page .kakuro-cell:first-child { border-left: 2px solid var(--kakuro-grid-line); }

.kakuro-page .kakuro-clue-cell, .kakuro-page .kakuro-block-cell {
  color: var(--kakuro-clue-ink);
  background: var(--kakuro-block);
}
.kakuro-page .kakuro-clue-cell { background: var(--kakuro-clue); }

.kakuro-page .kakuro-clue-diagonal {
  position: absolute;
  top: 50%;
  left: -22%;
  width: 144%;
  height: 2px;
  background: var(--kakuro-grid-line);
  transform: rotate(45deg);
  transform-origin: center;
}

.kakuro-page .kakuro-clue-down,
.kakuro-page .kakuro-clue-across {
  position: absolute;
  font-size: clamp(10px, 2.7vw, 13px);
  font-weight: 600;
  line-height: 1;
}

.kakuro-page .kakuro-clue-down { top: 6px; right: 6px; }
.kakuro-page .kakuro-clue-across { bottom: 6px; left: 6px; }
.kakuro-page .kakuro-play-cell-slot { background: var(--surface); }

.kakuro-page .kakuro-play-cell {
  position: relative;
  width: 100%;
  height: 100%;
  min-width: 44px;
  min-height: 44px;
  display: grid;
  place-items: center;
  padding: 0;
  border: 0 solid transparent;
  border-radius: 0;
  color: var(--ink);
  background: var(--surface);
  cursor: pointer;
  touch-action: manipulation;
  transition: background-color 180ms ease, border-color 180ms ease, box-shadow 180ms ease, transform 180ms ease;
}

.kakuro-page .kakuro-play-cell:hover:not(:disabled) { background: var(--brand-soft); }
.kakuro-page .kakuro-play-cell:active:not(:disabled) { transform: translateY(1px); }

.kakuro-page .kakuro-play-cell.is-active-across {
  background: var(--run-highlight);
}

.kakuro-page .kakuro-play-cell.is-active-down {
  background: var(--run-highlight);
}

.kakuro-page .kakuro-play-cell.is-selected {
  border: 3px solid var(--brand);
  background: var(--selection);
  box-shadow: inset 0 0 0 2px var(--surface);
}

.kakuro-page .kakuro-play-cell.is-assisted {
  box-shadow: inset 0 0 0 2px var(--brand);
}

.kakuro-page .kakuro-play-cell.is-assisted::after {
  position: absolute;
  top: 2px;
  right: 4px;
  color: var(--brand-strong);
  content: '•';
}

.kakuro-page .kakuro-play-cell.has-contradiction {
  color: var(--contradiction);
  background: var(--soft-contradiction);
}

.kakuro-page .kakuro-play-cell.has-contradiction::before {
  position: absolute;
  top: 1px;
  left: 4px;
  color: var(--contradiction);
  font: 900 14px/1 var(--sans);
  content: '!';
}

.kakuro-page .kakuro-play-cell.has-contradiction-across {
  border-top: 3px solid var(--contradiction);
  border-bottom: 3px solid var(--contradiction);
}

.kakuro-page .kakuro-play-cell.has-contradiction-down {
  border-right: 3px solid var(--contradiction);
  border-left: 3px solid var(--contradiction);
}

.kakuro-page .kakuro-play-cell.is-solved {
  border: 2px solid var(--verified-mint-border);
  color: var(--mint-deep);
  background: var(--soft-mint);
  border-color: var(--verified-mint-border);
}

.kakuro-page .kakuro-play-cell.is-solved::after {
  position: absolute;
  right: 3px;
  bottom: 1px;
  color: var(--mint-deep);
  font: 900 11px/1 var(--sans);
  content: '✓';
}

.kakuro-page .kakuro-play-cell:focus-visible {
  z-index: 4;
  outline: 3px solid var(--brand-strong);
  outline-offset: -4px;
}

.kakuro-page .kakuro-cell-value {
  font-size: 24px;
  font-weight: 800;
  line-height: 1;
}

.kakuro-page .kakuro-cell-notes {
  width: 100%;
  height: 100%;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  align-items: center;
  font-size: clamp(7px, 1.9vw, 10px);
  font-weight: 600;
  line-height: 1;
}

.kakuro-page .kakuro-cell-notes span { text-align: center; }

.kakuro-page #kakuro-active-sums {
  width: min(100%, calc(var(--kakuro-cell) * 7));
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: .5rem 1rem;
  margin: 1.25rem 0 .55rem;
  color: var(--muted-ink);
  font-size: 14px;
}

.kakuro-page #kakuro-active-sums span {
  padding: .35rem .55rem;
  border: 1px solid var(--derived-border);
  border-radius: 6px;
  background: var(--brand-soft);
}

.kakuro-page #kakuro-active-sums strong { color: var(--brand-strong); }

.kakuro-page #kakuro-status {
  min-height: 48px;
  max-width: 54ch;
  margin: 0;
  color: var(--muted-ink);
  font-size: 15px;
  line-height: 1.55;
  text-align: center;
  transition: color 180ms ease, background-color 180ms ease;
}

.kakuro-page .kakuro-progress {
  position: relative;
  height: 9px;
  overflow: hidden;
  border-radius: 9px;
  background: var(--decorative-border);
}

.kakuro-page .kakuro-progress::after {
  position: absolute;
  inset: 0 auto 0 0;
  width: var(--progress, 0%);
  background: var(--brand);
  content: '';
  transition: width 180ms ease;
}

.kakuro-page .kakuro-hint-panel {
  grid-area: hint;
  padding: 1rem;
  border: 1px solid var(--decorative-border);
  border-radius: 12px;
  color: var(--ink);
  background: var(--brand-soft);
}

.kakuro-page .kakuro-hint-panel h2 { margin-bottom: .5rem; font-size: 24px; }
.kakuro-page .kakuro-hint-panel p { margin-bottom: .75rem; font-size: 15px; line-height: 1.55; }
.kakuro-page .kakuro-hint-panel ul { margin: 0 0 .75rem; padding-left: 1.25rem; font-family: var(--mono); }

.kakuro-page .kakuro-controls {
  position: static;
  grid-area: controls;
  display: grid;
  gap: 8px;
  padding: .75rem;
  border: 1px solid var(--decorative-border);
  border-radius: 12px;
  background: var(--surface);
  box-shadow: var(--panel-shadow);
}

.kakuro-page .kakuro-action-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(44px, 1fr));
  gap: 8px;
}

.kakuro-page .kakuro-number-pad {
  display: grid;
  grid-template-columns: repeat(3, minmax(52px, 1fr));
  gap: 8px;
}

.kakuro-page .kakuro-edit-controls {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.kakuro-page .kakuro-controls button {
  min-width: 44px;
  min-height: 44px;
  padding: .45rem;
  border: 1px solid var(--decorative-border);
  border-radius: 8px;
  color: var(--ink);
  background: var(--surface);
  box-shadow: none;
  font-weight: 800;
  cursor: pointer;
  touch-action: manipulation;
  transition: color 180ms ease, background-color 180ms ease, border-color 180ms ease, box-shadow 180ms ease, transform 180ms ease;
}

.kakuro-page .kakuro-controls button:hover:not(:disabled) {
  border-color: var(--brand);
  color: var(--brand-strong);
  background: var(--brand-soft);
}

.kakuro-page .kakuro-controls button:active:not(:disabled) {
  box-shadow: inset 0 0 0 1px var(--brand);
  transform: translateY(1px);
}

.kakuro-page .kakuro-controls button[aria-pressed='true'] {
  border-color: var(--brand);
  color: var(--brand-strong);
  background: var(--brand-soft);
  box-shadow: inset 0 0 0 1px var(--brand);
}

.kakuro-page .kakuro-controls button:disabled { opacity: .45; cursor: not-allowed; }

.kakuro-page .kakuro-action-row button {
  min-width: 44px;
  min-height: 52px;
}

.kakuro-page .kakuro-action-row #kakuro-apply-hint {
  min-height: 52px;
}

.kakuro-page .kakuro-action-row .hint-button {
  border-color: var(--derived-border);
  color: var(--brand-strong);
  background: var(--brand-soft);
}

.kakuro-page .kakuro-action-row .primary-button {
  border-color: var(--brand-strong);
  color: var(--surface);
  background: var(--brand);
  box-shadow: none;
}

.kakuro-page .hint-button, .kakuro-page .primary-button { min-height: 52px; }

.kakuro-page .kakuro-solved {
  border-top: 4px solid var(--verified-mint-border);
  background: var(--soft-mint);
}

.kakuro-page .kakuro-solved:not([hidden]) { animation: kakuro-completion 220ms ease-out both; }

@keyframes kakuro-completion {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 1050px) {
  .kakuro-page .kakuro-board {
    width: min(100%, 720px);
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  .kakuro-page .kakuro-play-status { order: 0; width: min(100%, 560px); }
  .kakuro-page .kakuro-workspace { order: 1; }
  .kakuro-page .kakuro-hint-panel { order: 2; width: min(100%, 560px); }
  .kakuro-page .kakuro-controls { position: static; order: 3; width: min(100%, 560px); }
}

@media (max-width: 760px) {
  .kakuro-page { overflow-x: visible; }
  .kakuro-page.kakuro-active {
    padding-bottom: var(--kakuro-controls-height, 0px);
    scroll-padding-bottom: var(--kakuro-controls-height, 0px);
  }
  .kakuro-page .kakuro-casebar { padding: 1rem 1.5rem; }
  .kakuro-page .kakuro-casebar .case-identity {
    grid-template-columns: 1fr auto;
    grid-template-rows: auto auto auto;
    gap: .35rem .75rem;
  }
  .kakuro-page .kakuro-casebar .eyebrow { grid-column: 1 / -1; }
  .kakuro-page .kakuro-casebar h1 { grid-column: 1; grid-row: 2; font-size: clamp(36px, 11vw, 48px); }
  .kakuro-page .kakuro-difficulty { grid-column: 2; grid-row: 2; }
  .kakuro-page #kakuro-rule { grid-column: 1 / -1; grid-row: 3; }
  .kakuro-page .kakuro-board { width: 100%; padding: 1rem 1.5rem 1.5rem; }
  .kakuro-page .kakuro-grid { filter: drop-shadow(0 8px 12px rgb(120 70 92 / 10%)); }
  .kakuro-page #kakuro-active-sums { margin: .875rem 0 .55rem; }
  .kakuro-page .kakuro-hint-panel { width: 100%; }
  .kakuro-page .kakuro-controls {
    position: fixed;
    z-index: 18;
    right: 0;
    bottom: 0;
    left: 0;
    width: 100%;
    order: 3;
    padding: .75rem 1rem;
    padding-bottom: calc(.75rem + env(safe-area-inset-bottom));
    border-width: 2px 0 0;
    border-radius: 0;
    box-shadow: 0 -10px 24px rgb(120 70 92 / 12%);
  }
  .kakuro-page .kakuro-number-pad { grid-template-columns: repeat(5, minmax(44px, 1fr)); }
  .kakuro-page .kakuro-edit-controls { grid-template-columns: repeat(3, minmax(44px, 1fr)); }
}

@media (prefers-reduced-motion: reduce) {
  .kakuro-page .kakuro-play-cell,
  .kakuro-page #kakuro-status,
  .kakuro-page .kakuro-solved {
    transition: none !important;
    animation: none !important;
    transform: none !important;
  }
  .kakuro-page .kakuro-progress::after { transition: none !important; }
}