/* Sudoku: crisp paper grid, calm highlights, large clear numbers. */

:root {
  --paper: #fffdf7;
  --ink: #1d1b16;
  --given-ink: #1d1b16;
  --entry-ink: #1f5fbf;
  --thin: rgba(30, 27, 22, 0.16);
  --thick: #2b2822;
  --sel: #ffe08a;
  --peer: #f1ece0;
  --same: #d8e7fb;
  --bad: #d23c2e;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    --paper: #23262b;
    --ink: #eceae4;
    --given-ink: #eceae4;
    --entry-ink: #7fb2ff;
    --thin: rgba(255, 255, 255, 0.1);
    --thick: #0b0c0e;
    --sel: #6b5a22;
    --peer: #2b2f35;
    --same: #243650;
    --bad: #ff6b5e;
  }
}
:root[data-theme='dark'] {
  --paper: #23262b;
  --ink: #eceae4;
  --given-ink: #eceae4;
  --entry-ink: #7fb2ff;
  --thin: rgba(255, 255, 255, 0.1);
  --thick: #0b0c0e;
  --sel: #6b5a22;
  --peer: #2b2f35;
  --same: #243650;
  --bad: #ff6b5e;
}
:root[data-theme='hallows'] {
  --paper: #2a2140;
  --ink: #f4e8cc;
  --given-ink: #f4e8cc;
  --entry-ink: #ffc27a;
  --thin: rgba(232, 176, 74, 0.14);
  --thick: #0d0818;
  --sel: #6e4a1c;
  --peer: #33294d;
  --same: #4a3560;
  --bad: #ff7a5c;
}
:root[data-theme='hallows'] .hw-candle {
  display: none;
}
:root[data-theme='hallows'] .title-main {
  font-family: var(--font-display);
  letter-spacing: 0;
}
body {
  min-height: var(--app-height);
  padding: var(--safe-top) var(--safe-right) var(--safe-bottom) var(--safe-left);
}
#announce {
  margin: 0;
  top: 0;
}
.app {
  display: flex;
  flex-direction: column;
  height: calc(var(--app-height) - var(--safe-top) - var(--safe-bottom));
  min-height: 520px;
  max-width: 520px;
  margin: 0 auto;
}
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 14px 6px;
}
.title-btn {
  appearance: none;
  border: 0;
  background: none;
  text-align: left;
  cursor: pointer;
  padding: 4px 6px;
  border-radius: 12px;
  color: var(--text);
  min-width: 0;
}
.title-btn:hover {
  background: var(--accent-soft);
}
.title-main {
  display: block;
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.title-main::after {
  content: ' ▾';
  font-size: 0.7em;
  color: var(--text-muted);
}
.title-sub {
  display: block;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.8rem;
}
.score {
  display: flex;
  gap: 8px;
}
.chip {
  min-width: 64px;
  text-align: center;
  padding: 6px 12px;
  border-radius: 14px;
  background: var(--surface);
  border: 1px solid var(--border);
}
.chip small {
  display: block;
  font-size: 0.66rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}
.chip b {
  display: block;
  font-size: 1.3rem;
  font-variant-numeric: tabular-nums;
}

.stage {
  flex: 1 1 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 6px 12px;
  container-type: size;
}
.loading {
  margin: auto;
  color: var(--text-muted);
  font-weight: 600;
}
.loading[hidden] {
  display: none;
}
.grid-wrap {
  width: min(100cqw, 100cqh - 150px, 560px);
  flex: none;
}
.su-grid {
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  aspect-ratio: 1;
  border: 3px solid var(--thick);
  border-radius: 8px;
  overflow: hidden;
  background: var(--paper);
}
.su-cell {
  position: relative;
  appearance: none;
  border: 0;
  padding: 0;
  background: var(--paper);
  color: var(--entry-ink);
  box-shadow: inset -1px -1px 0 var(--thin);
  cursor: pointer;
  font: inherit;
  container-type: inline-size;
}
.su-cell.c2,
.su-cell.c5 {
  border-right: 2.5px solid var(--thick);
}
.su-cell.r2,
.su-cell.r5 {
  border-bottom: 2.5px solid var(--thick);
}
.su-cell b {
  font-size: 62cqi;
  font-weight: 700;
  line-height: 1;
}
.su-cell.given {
  color: var(--given-ink);
}
.su-cell.given b {
  font-weight: 800;
}
.su-cell.peer {
  background: var(--peer);
}
.su-cell.same {
  background: var(--same);
}
.su-cell.sel {
  background: var(--sel);
}
.su-cell.bad b {
  color: var(--bad);
}
.su-cell.bad {
  box-shadow: inset 0 0 0 2px color-mix(in srgb, var(--bad) 55%, transparent);
}
.su-cell .notes {
  position: absolute;
  inset: 4%;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  pointer-events: none;
}
.su-cell .notes i {
  font-style: normal;
  font-size: 24cqi;
  line-height: 1;
  display: grid;
  place-items: center;
  color: var(--text-muted);
  visibility: hidden;
}
.su-cell .notes i.on {
  visibility: visible;
}
.su-cell b:not(:empty) + .notes {
  display: none;
}
.su-grid.solved .su-cell {
  animation: wave 0.6s ease both;
  animation-delay: calc((var(--d, 0)) * 1ms);
}
@keyframes wave {
  50% {
    background: var(--same);
  }
}
.pad {
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  gap: 5px;
  width: min(100%, 560px);
}
.pad-key {
  appearance: none;
  position: relative;
  min-height: 52px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  cursor: pointer;
}
.pad-key b {
  font-size: 1.5rem;
  font-weight: 800;
}
.pad-key small {
  position: absolute;
  top: 3px;
  right: 6px;
  font-size: 0.62rem;
  color: var(--text-muted);
  font-weight: 700;
}
.pad-key.used-up {
  opacity: 0.35;
}
.pad-key:active {
  transform: scale(0.95);
}
.pad-tools {
  display: flex;
  gap: 6px;
  width: min(100%, 560px);
}
.pad-tools .pad-key {
  flex: 1;
  min-height: 42px;
  font-weight: 700;
  font-size: 0.92rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}
.pad-key.on {
  background: var(--accent);
  color: var(--accent-contrast);
  border-color: transparent;
}
body.big .pad-key {
  min-height: 60px;
}
body.big .pad-key b {
  font-size: 1.8rem;
}
body.big .grid-wrap {
  width: min(100cqw, 100cqh - 180px, 640px);
}
.results .stamp {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  .su-grid.solved .su-cell {
    animation: none;
  }
}

/* Print just the puzzle, big and black on white. */
@media print {
  body {
    background: #fff !important;
    color: #000;
  }
  .topbar .score,
  .toolbar,
  .pad,
  .pad-tools,
  .hallows-scene,
  .toast,
  .hub-link,
  dialog {
    display: none !important;
  }
  .app {
    height: auto;
    display: block;
  }
  .grid-wrap {
    width: 16cm;
    margin: 1cm auto;
  }
  .su-grid {
    --paper: #fff;
    border-color: #000;
  }
  .su-cell {
    --thick: #000;
    background: #fff !important;
    box-shadow: inset -1px -1px 0 #999;
  }
  .su-cell:not(.given) b {
    visibility: hidden;
  }
  .su-cell .notes {
    display: none;
  }
  .su-cell.given b {
    color: #000;
  }
}
/* ---------- Toolbar and menus ---------- */

.toolbar {
  display: flex;
  justify-content: center;
  gap: 6px;
  padding: 6px 8px 10px;
}
.tool {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--text);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  min-width: 64px;
  min-height: 50px;
  padding: 6px 8px;
  border-radius: 14px;
  font-size: 0.76rem;
  font-weight: 600;
  cursor: pointer;
}
.tool:hover:not(:disabled) {
  background: var(--accent-soft);
}
.tool:disabled {
  opacity: 0.38;
}
.menu-list {
  display: grid;
  gap: 10px;
}
.menu-card {
  appearance: none;
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  text-align: left;
  padding: 14px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  cursor: pointer;
}
.menu-card .menu-icon {
  display: grid;
  place-items: center;
  flex: none;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent);
}
.menu-card b {
  display: block;
  font-size: 1.05rem;
}
.menu-card small {
  color: var(--text-muted);
}
.menu-row {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}
.menu-row .btn {
  flex: 1;
}
@media (prefers-reduced-motion: reduce) {
  .row.reveal .pegs .peg {
    animation: none;
  }
}