/* Shared shell for the puzzle routes. The page owns its puzzle mechanics.
   Same palette and type as game.css and hub.css: dark navy ground, warm
   ink, indigo for structure and ember for the thing you are chasing. The
   tokens are prefixed rather than shared because this shell lays a page out
   nothing like a Read the Crowd round does. Values must not drift. */

:root {
  --puzzle-ground: #0d1020;
  --puzzle-ground-lift: #151a30;
  --puzzle-rule: #2b3252;
  --puzzle-ink: #e8e4d9;
  --puzzle-quiet: #9aa0bd;
  --puzzle-indigo: #6b7ccf;
  --puzzle-indigo-bright: #94a4ee;
  --puzzle-ember: #e0a458;
  --puzzle-display: "Alfa Slab One", "Baumans", Georgia, serif;
  --puzzle-data: "Baumans", "Trebuchet MS", system-ui, sans-serif;
  --puzzle-text: ui-sans-serif, system-ui, "Segoe UI", Helvetica, Arial, sans-serif;
}

body {
  margin: 0;
  background: var(--puzzle-ground);
  color: var(--puzzle-ink);
  font-family: var(--puzzle-text);
}

.skip-link {
  position: absolute;
  top: 1rem;
  left: -9999px;
  z-index: 10;
  padding: 0.7rem 1rem;
  color: var(--puzzle-ground);
  background: var(--puzzle-indigo);
}

.skip-link:focus-visible {
  left: 1rem;
}

.puzzle-shell {
  min-height: 100vh;
  background:
    radial-gradient(900px 500px at 50% -12%, #1b2140 0%, transparent 63%),
    var(--puzzle-ground);
  color: var(--puzzle-ink);
  font-family: var(--puzzle-text);
  line-height: 1.5;
}

.puzzle-shell a:focus-visible,
.puzzle-shell button:focus-visible,
.puzzle-shell input:focus-visible,
.puzzle-shell textarea:focus-visible,
.puzzle-shell [tabindex]:focus-visible {
  outline: 3px solid var(--puzzle-indigo-bright);
  outline-offset: 3px;
}

/* ---------- site chrome ----------
   Duplicated from hub.css on purpose, same as game.css duplicates it. Three
   copies of a masthead is not yet a DRY emergency, and a shared base file is
   later work. What matters is that the values match, which the theme test
   enforces. */

.masthead {
  border-bottom: 1px solid var(--puzzle-rule);
  padding: 1.1rem 1rem 0.9rem;
  text-align: center;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.06em;
  font-family: var(--puzzle-data);
  font-size: clamp(1.15rem, 5vw, 1.6rem);
  letter-spacing: 0.06em;
  color: var(--puzzle-indigo-bright);
  text-decoration: none;
}
.wordmark:hover,
.wordmark:focus-visible { color: var(--puzzle-ink); }

.brain-o {
  /* Jeff's own 2018 artwork, cropped out of the original horizontal lockup.
     It is a painting, not a geometry, so it ships as the raster rather than
     as a trace that would throw away the texture. Sized to the proportion it
     holds in that lockup: about 1.5x the cap height of the letters either
     side of it. */
  width: 1.6em;
  height: 1.6em;
  margin: 0 -0.08em;
  flex: none;
  display: block;
}

.foot {
  border-top: 1px solid var(--puzzle-rule);
  padding: 1rem;
  text-align: center;
}
.foot p { margin: 0; font-size: 0.78rem; color: var(--puzzle-quiet); }
.foot a { color: var(--puzzle-quiet); text-decoration-color: var(--puzzle-rule); }
.foot a:hover, .foot a:focus-visible { color: var(--puzzle-ink); }
.foot p.foot-brand { font-family: var(--puzzle-data); letter-spacing: 0.04em; }
.foot p.studio-credit { margin-top: 0.5rem; }
.foot-social {
  display: flex;
  justify-content: center;
  gap: 1.1rem;
  margin: 0.7rem 0 0;
  padding: 0;
  list-style: none;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.puzzle-header {
  max-width: 42rem;
  margin: 0 auto;
  padding: 1.25rem 1rem 0.85rem;
  border-bottom: 1px solid var(--puzzle-rule);
}

.puzzle-header h1 {
  margin: 0;
  color: var(--puzzle-ember);
  font-family: var(--puzzle-display);
  font-size: clamp(2rem, 10vw, 3.5rem);
  line-height: 1;
  letter-spacing: 0.012em;
  margin-right: -0.012em;
}

.puzzle-header p {
  margin: 0.45rem 0 0;
  color: var(--puzzle-quiet);
}

.mode-switch {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.mode-switch a,
.mode-switch button {
  min-height: 44px;
  padding: 0.65rem 0.9rem;
  border: 1px solid var(--puzzle-rule);
  border-radius: 0.25rem;
  color: var(--puzzle-ink);
  background: var(--puzzle-ground-lift);
  font: inherit;
  text-decoration: none;
}

.mode-switch [aria-current="page"],
.mode-switch .is-active {
  border-color: var(--puzzle-indigo);
  color: var(--puzzle-ground);
  background: var(--puzzle-indigo);
}

.game-status {
  min-height: 1.5rem;
  margin: 1rem auto;
  color: var(--puzzle-quiet);
  font-family: var(--puzzle-data);
  font-size: 0.82rem;
}

/* ---------- first-run tutorial ----------
 * Sits at the top of the game shell, so the board it is talking about is
 * visible underneath it. The ember rule is the only thing that separates it
 * from the round itself, which is the point: it is not a modal and it does
 * not stop you touching the board. */
.tutorial-panel {
  max-width: 42rem;
  margin: 0 auto 1rem;
  padding: .9rem 1rem 1rem;
  border: 1px solid var(--puzzle-ember);
  border-left-width: 4px;
  background: var(--puzzle-ground-lift);
}

.tutorial-counter {
  margin: 0;
  color: var(--puzzle-ember);
  font-family: var(--puzzle-data);
  font-size: .72rem;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.tutorial-title {
  margin: .2rem 0 .35rem;
  color: var(--puzzle-ink);
  font-family: var(--puzzle-display);
  font-size: 1.05rem;
  font-weight: 400;
}

.tutorial-title:focus-visible { outline: 3px solid var(--puzzle-indigo-bright); outline-offset: 3px; }

.tutorial-body { margin: 0 0 .75rem; color: var(--puzzle-ink); font-size: .9rem; line-height: 1.5; }

.tutorial-actions { display: flex; flex-wrap: wrap; gap: .5rem; }

.tutorial-actions button {
  min-height: 44px;
  padding: .55rem .95rem;
  border: 1px solid var(--puzzle-rule);
  border-radius: .2rem;
  color: var(--puzzle-ink);
  background: var(--puzzle-ground);
  font: inherit;
  cursor: pointer;
}

.tutorial-next { border-color: var(--puzzle-ember); }
.tutorial-skip { color: var(--puzzle-quiet); }

.tutorial-actions button:hover,
.tutorial-actions button:focus-visible { color: var(--puzzle-ground); background: var(--puzzle-ember); }

.result-panel {
  max-width: 42rem;
  margin: 1rem auto;
  padding: 1.25rem 1rem;
  border: 1px solid var(--puzzle-rule);
  background: var(--puzzle-ground-lift);
}

.result-panel h2 {
  margin: 0;
  color: var(--puzzle-ember);
  font-family: var(--puzzle-display);
}

.result-panel button,
.result-panel a {
  min-height: 44px;
}
.result-panel button { padding: .65rem .85rem; border: 1px solid var(--puzzle-rule); border-radius: .2rem; color: var(--puzzle-ink); background: var(--puzzle-ground); font: inherit; cursor: pointer; }

.studio-credit {
  color: var(--puzzle-quiet);
  font-size: 0.8rem;
}

.studio-credit a { color: var(--puzzle-indigo-bright); }

.puzzle-kicker,
.buried-edition,
.buried-clue-label,
.buried-length,
.buried-help,
.buried-stats,
.buried-cell,
.buried-actions,
.signal-edition,
.signal-label,
.signal-stats,
.signal-piece-name,
.signal-rail,
.signal-control,
.signal-actions,
.signal-help { font-family: var(--puzzle-data); }

.buried-page { max-width: 42rem; margin: 0 auto; padding: 1rem; }
.puzzle-kicker,
.buried-edition,
.buried-clue-label { margin: 0; color: var(--puzzle-indigo-bright); font-size: .75rem; text-transform: uppercase; letter-spacing: .08em; }
.buried-intro h2 { margin: .4rem 0 0; font-family: var(--puzzle-display); font-size: 1.8rem; }
.buried-clue { margin: .25rem 0; font-family: var(--puzzle-display); font-size: 1.35rem; }
.buried-length { margin: 0; color: var(--puzzle-quiet); font-size: .8rem; }
.buried-stuck { margin: .5rem 0 0; color: var(--puzzle-quiet); font-size: .8rem; }
.buried-stuck summary { min-height: 44px; display: flex; align-items: center; color: var(--puzzle-indigo-bright); cursor: pointer; }
.buried-stuck summary:focus-visible { outline: 3px solid var(--puzzle-indigo-bright); outline-offset: 3px; }
.buried-stuck p { margin: .1rem 0 .4rem; color: var(--puzzle-ink); }
.result-answer { margin: .35rem 0 0; color: var(--puzzle-ember); font-family: var(--puzzle-display); font-size: 1.25rem; }
.buried-stats { display: flex; gap: 1rem; margin: 1rem 0; color: var(--puzzle-quiet); font-size: .8rem; }
.buried-stats strong { color: var(--puzzle-ember); }
/* The cells size to the board and nothing else. They used to carry a 44px
   minimum, the touch-target figure, and on an 8 wide grid that number does not
   fit any phone narrower than about 412px. The cells did not overflow when it
   did not fit, they overlapped: each one sat 44px wide on a 36px track and the
   next one painted over its right edge. Hit testing goes to whatever paints
   last, so a tap on the right few pixels of a cell opened its neighbour, and on
   a minefield that neighbour can cost a strike. Correct taps beat a nominal
   target size, and a board you have to scroll sideways is worse than both. */
.buried-board { display: grid; grid-template-columns: repeat(8, minmax(0, 1fr)); gap: .25rem; max-width: 32rem; margin: 1rem auto; }
.buried-cell { aspect-ratio: 1; min-width: 0; min-height: 0; padding: 0; border: 1px solid var(--puzzle-rule); border-radius: .15rem; color: var(--puzzle-quiet); background: #0b0f1e; font-size: clamp(.8rem, 5vw, 1.2rem); cursor: pointer; }
.buried-cell { display: flex; align-items: center; justify-content: center; gap: .2rem; }
.buried-letter { line-height: 1; }
.buried-count { color: var(--puzzle-ember); font-size: .55em; line-height: 1; }
.buried-count.is-zero { opacity: .35; }
.buried-cell.is-revealed { border-color: #3c4573; color: var(--puzzle-ink); background: #1b2140; }
.buried-cell.is-traced, .buried-cell.is-answer { border-color: var(--puzzle-indigo-bright); color: var(--puzzle-indigo-bright); background: #232b52; }
.buried-cell.is-flagged { border-color: var(--puzzle-ember); color: var(--puzzle-ember); }
.buried-cell.is-mine { border-color: var(--puzzle-ember); color: var(--puzzle-ground); background: var(--puzzle-ember); }
.buried-actions { display: flex; flex-wrap: wrap; gap: .5rem; margin: 1rem 0; font-size: .8rem; }
.buried-actions button { min-height: 44px; padding: .6rem .8rem; border: 1px solid var(--puzzle-rule); border-radius: .2rem; color: var(--puzzle-ink); background: var(--puzzle-ground-lift); font: inherit; cursor: pointer; }
.buried-actions button:disabled { opacity: .45; cursor: not-allowed; }
.buried-help { margin: 1rem 0; color: var(--puzzle-quiet); font-size: .75rem; }
.signal-page { max-width: 42rem; margin: 0 auto; padding: 1rem; }
.signal-edition, .signal-label { margin: 0; color: var(--puzzle-indigo-bright); font-size: .75rem; text-transform: uppercase; letter-spacing: .08em; }
.signal-intro h2 { margin: .4rem 0 0; font-family: var(--puzzle-display); font-size: 1.8rem; }
.signal-intro p:last-child { margin: .35rem 0; color: var(--puzzle-quiet); }
.signal-stats { display: flex; flex-wrap: wrap; gap: .5rem 1rem; margin: 1rem 0; color: var(--puzzle-quiet); font-size: .78rem; }
.signal-stats strong { color: var(--puzzle-ember); }
.signal-stage { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 5rem; padding: .65rem; border: 1px solid var(--puzzle-rule); background: var(--puzzle-ground-lift); }
.signal-piece-name { margin: .25rem 0 0; color: var(--puzzle-ink); }
.signal-piece { display: grid; grid-template-columns: repeat(3, 28px); grid-template-rows: repeat(3, 28px); width: 84px; height: 84px; }
.signal-preview-cell { position: relative; width: 28px; height: 28px; }
.signal-receiver { display: grid; grid-template-columns: 1.4rem minmax(0, 24rem) 1.4rem; align-items: stretch; justify-content: center; gap: .25rem; max-width: 100%; margin: 1rem auto; }
.signal-rail { display: flex; align-items: center; justify-content: center; padding: .25rem 0; border: 1px solid #7a5c2e; color: var(--puzzle-ember); background: #241a0d; font-size: .6rem; line-height: 1; text-transform: uppercase; letter-spacing: .08em; writing-mode: vertical-rl; }
.signal-board { display: grid; grid-template-columns: repeat(8, minmax(0, 1fr)); width: 100%; border: 1px solid var(--puzzle-rule); background: #080b18; }
.signal-cell { position: relative; aspect-ratio: 1; min-width: 0; border: 1px solid #1c2340; background: #0b0f1e; }
.signal-cell.is-occupied { background: #232b52; }
.signal-cell.is-landing { box-shadow: inset 0 0 0 2px var(--puzzle-ember); background: #2a2110; }
.signal-node { position: absolute; top: 43%; left: 43%; width: 14%; height: 14%; border-radius: 50%; background: var(--puzzle-indigo-bright); }
.signal-trace { position: absolute; background: var(--puzzle-indigo-bright); }
.signal-trace-n { top: 0; bottom: 50%; left: calc(50% - 1px); width: 2px; }
.signal-trace-e { top: calc(50% - 1px); right: 0; left: 50%; height: 2px; }
.signal-trace-s { top: 50%; bottom: 0; left: calc(50% - 1px); width: 2px; }
.signal-trace-w { top: calc(50% - 1px); right: 50%; left: 0; height: 2px; }
.signal-cell.is-landing .signal-node, .signal-cell.is-landing .signal-trace { background: var(--puzzle-ember); }
.signal-controls { display: grid; grid-template-columns: repeat(5, minmax(44px, 1fr)); gap: .35rem; }
.signal-control, .signal-actions button { min-height: 44px; padding: .55rem .4rem; border: 1px solid var(--puzzle-rule); border-radius: .2rem; color: var(--puzzle-ink); background: var(--puzzle-ground-lift); font: inherit; font-size: .68rem; cursor: pointer; }
.signal-control.is-primary { border-color: var(--puzzle-ember); color: var(--puzzle-ember); }
.signal-control:disabled, .signal-actions button:disabled { opacity: .4; cursor: not-allowed; }
.signal-actions { display: flex; flex-wrap: wrap; gap: .5rem; margin: .75rem 0; }
.signal-actions button { padding-left: .8rem; padding-right: .8rem; }
.signal-help { margin: .75rem 0; color: var(--puzzle-quiet); font-size: .72rem; }
.signal-game.is-discharging .signal-board { animation: signal-discharge .32s ease-out; }
.result-panel textarea { box-sizing: border-box; width: 100%; margin-top: .75rem; color: var(--puzzle-ink); background: var(--puzzle-ground); }
@keyframes signal-discharge { 50% { border-color: var(--puzzle-indigo-bright); box-shadow: 0 0 1.5rem #94a4ee66; } }

@media (max-width: 320px) {
  .buried-page { padding-left: 0; padding-right: 0; }
  .buried-board { width: calc(100% - 1px); max-width: none; margin-left: 0; margin-right: 0; gap: 0; }
}

@media (max-width: 319px) {
  .buried-board { width: 100%; grid-template-columns: repeat(8, 44px); overflow-x: auto; overscroll-behavior-inline: contain; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}

@media (max-width: 320px) {
  .signal-page { padding-left: 0; padding-right: 0; }
  .signal-intro, .signal-stats, .signal-stage, .signal-controls, .signal-actions, .signal-help, .signal-page > .game-status { margin-left: .5rem; margin-right: .5rem; }
  .signal-receiver { grid-template-columns: 1rem minmax(0, 1fr) 1rem; gap: .15rem; }
  .signal-rail { font-size: .48rem; }
  .puzzle-header,
  .result-panel { padding-left: 0.75rem; padding-right: 0.75rem; }
}