:root {
  --bg: #0b0f17;
  --bg-2: #111827;
  --panel: #151c2b;
  --panel-2: #1b2436;
  --line: #2a3550;
  --text: #e6ebf5;
  --muted: #8b97b1;

  --emerald: #2fd3a0;
  --sapphire: #4f8cff;
  --amethyst: #a77bff;
  --ruby: #ff5c7a;
  --topaz: #ffc457;
  --aqua: #4fd6e3;

  --cell-bg: #f3f5fa;
  --cell-text: #0b0f17;
  --cell-word: #cfe0ff;
  --cell-active: #ffc457;
  --cell-block: transparent;
  --cell-edge: rgba(0, 0, 0, 0.15);
  --cell-num: #3a4560;
  --cell-wrong: #d0213f;
  --cell-revealed: #3d5fd6;
  --cell-solved: #d3f7ea;

  --primary: var(--sapphire);
  --primary-soft: rgba(79, 140, 255, 0.18);
  --primary-faint: rgba(79, 140, 255, 0.07);
  --glow-1: rgba(79, 140, 255, 0.12);
  --glow-2: rgba(167, 123, 255, 0.10);
  --kb-bg: rgba(11, 15, 23, 0.94);
  --backdrop: rgba(5, 8, 14, 0.7);
  --shadow: rgba(0, 0, 0, 0.45);
  --overlay: rgba(11, 15, 23, 0.64);

  --radius: 10px;
  --sans: "Space Grotesk", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
}

* { box-sizing: border-box; }

html, body { margin: 0; }

body {
  background:
    radial-gradient(1200px 600px at 10% -10%, var(--glow-1), transparent 60%),
    radial-gradient(900px 500px at 110% 10%, var(--glow-2), transparent 60%),
    var(--bg);
  background-attachment: fixed;
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

button { font: inherit; color: inherit; }

.skip {
  position: absolute; left: -999px; top: 8px;
  background: var(--topaz); color: #000; padding: 8px 12px; border-radius: 6px; z-index: 10;
}
.skip:focus { left: 8px; }

/* ---------- header ---------- */
.top {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 14px max(16px, env(safe-area-inset-left)) 10px;
  max-width: 1200px; margin: 0 auto;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand img { display: block; border-radius: 6px; }
.brand-name { font-weight: 700; font-size: 1.15rem; letter-spacing: -0.01em; display: block; line-height: 1.1; }
.brand-domain { font-family: var(--mono); font-size: 0.72rem; color: var(--emerald); display: block; }
.top-actions { display: flex; align-items: center; gap: 8px; }
.timer {
  font-family: var(--mono); font-size: 0.95rem; color: var(--topaz);
  padding: 6px 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--bg-2);
  min-width: 70px; text-align: center; font-variant-numeric: tabular-nums;
}

/* ---------- buttons ---------- */
.btn {
  appearance: none; border: 1px solid var(--line); background: var(--panel-2);
  padding: 7px 14px; border-radius: 8px; cursor: pointer; font-weight: 500; font-size: 0.92rem;
  transition: background .15s, border-color .15s, transform .05s;
}
.btn:hover { border-color: var(--primary); }
.btn:active { transform: translateY(1px); }
.btn:focus-visible, .nav-btn:focus-visible, .clues li:focus-visible, .key:focus-visible {
  outline: 2px solid var(--topaz); outline-offset: 2px;
}
.btn.ghost { background: transparent; }
.btn.danger:hover { border-color: var(--ruby); color: var(--ruby); }

/* ---------- puzzle picker ---------- */
.picker { max-width: 1200px; margin: 0 auto; padding: 4px 16px 14px; }

/* Category switch: a segmented control */
.picker-tabs {
  display: inline-flex; gap: 2px; padding: 3px; margin-bottom: 10px;
  max-width: 100%; overflow-x: auto; scrollbar-width: none;
  background: var(--bg-2); border: 1px solid var(--line); border-radius: 10px;
}
.picker-tab {
  appearance: none; background: none; border: 0; border-radius: 7px; cursor: pointer;
  padding: 6px 14px; color: var(--muted); white-space: nowrap;
  font-size: 0.88rem; font-weight: 500;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
}
.picker-tab:hover { color: var(--text); }
.picker-tab[aria-selected="true"] {
  color: var(--text); background: var(--panel-2);
  box-shadow: inset 0 0 0 1px var(--accent, var(--primary));
}
.picker-tab:focus-visible { outline: 2px solid var(--topaz); outline-offset: 1px; }
.picker-tab .count {
  font-family: var(--mono); font-size: 0.7rem; padding: 1px 6px; border-radius: 999px;
  background: var(--bg); color: var(--muted);
}
.picker-tab[aria-selected="true"] .count { color: var(--accent, var(--primary)); }
.tab-short { display: none; }

/* Puzzles: an even grid of tiles */
.picker-chips {
  display: grid; gap: 8px;
  grid-template-columns: repeat(auto-fill, minmax(176px, 1fr));
}
.tile {
  appearance: none; position: relative; overflow: hidden; cursor: pointer; text-align: left;
  display: flex; flex-direction: column; gap: 3px; min-width: 0;
  padding: 9px 12px 11px; border-radius: 10px;
  background: var(--bg-2); border: 1px solid var(--line);
  transition: border-color .15s, background .15s;
}
.tile:hover { border-color: var(--muted); }
.tile:focus-visible { outline: 2px solid var(--topaz); outline-offset: 2px; }
.tile[aria-current="true"] {
  background: var(--panel-2); border-color: var(--accent, var(--primary));
  box-shadow: inset 0 0 0 1px var(--accent, var(--primary));
}
.tile-title {
  font-weight: 500; font-size: 0.92rem; line-height: 1.25;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.tile-meta {
  display: flex; justify-content: space-between; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 0.7rem; color: var(--muted);
}
.diff { display: inline-flex; align-items: center; gap: 5px; }
.diff::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.diff-easy::before { background: var(--emerald); }
.diff-medium::before { background: var(--topaz); }
.diff-hard::before { background: var(--ruby); }
.diff-expert::before { background: var(--amethyst); box-shadow: 0 0 0 2px rgba(167, 123, 255, 0.35); }
.diff-cryptic::before { background: var(--sapphire); box-shadow: 0 0 0 2px rgba(79, 140, 255, 0.35); }
.tile.done .tile-status { color: var(--emerald); }
.tile-bar {
  position: absolute; left: 0; bottom: 0; height: 3px; width: var(--pct, 0%);
  background: var(--accent, var(--primary)); opacity: .85;
}
.tile.done .tile-bar { background: var(--emerald); }
[data-cat="general"] { --accent: var(--amethyst); }
[data-cat="cyber"] { --accent: var(--emerald); }
[data-cat="ai"] { --accent: var(--sapphire); }
[data-cat="economics"] { --accent: var(--topaz); }
[data-cat="psychology"] { --accent: var(--ruby); }
[data-cat="philosophy"] { --accent: var(--aqua); }

.picker-tabs::-webkit-scrollbar { display: none; }
@media (max-width: 900px) {
  .tab-full { display: none; }
  .tab-short { display: inline; }
}
@media (max-width: 700px) {
  .picker-tabs { display: flex; width: 100%; }
  .picker-tab { flex: 1 0 auto; padding: 7px 8px; }
  /* Tiles become a swipeable row, with a fade hinting there's more */
  .picker-chips {
    grid-template-columns: none; grid-auto-flow: column; grid-auto-columns: minmax(150px, 44%);
    overflow-x: auto; scroll-snap-type: x mandatory; scrollbar-width: none;
    padding-bottom: 2px;
    -webkit-mask-image: linear-gradient(to right, #000 82%, transparent);
            mask-image: linear-gradient(to right, #000 82%, transparent);
  }
  .picker-chips::-webkit-scrollbar { display: none; }
  .tile { scroll-snap-align: start; }
  .tile-title {
    white-space: normal; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
    min-height: 2.5em;
  }
}
@media (max-width: 560px) {
  /* Counts move off the tabs on phones; each tile still shows its progress */
  .picker-tab .count { display: none; }
  .picker-tab { padding: 7px 4px; font-size: 0.85rem; }
}

/* ---------- layout ---------- */
.layout {
  max-width: 1200px; margin: 0 auto; padding: 6px 16px 24px;
  display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(280px, 1fr); gap: 24px; align-items: start;
}
.play { min-width: 0; }

.puzzle-head { display: flex; justify-content: space-between; align-items: end; gap: 12px; flex-wrap: wrap; margin-bottom: 10px; }
.eyebrow { margin: 0; font-family: var(--mono); font-size: 0.74rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em; }
.eyebrow .cat-cyber { color: var(--emerald); }
.eyebrow .cat-general { color: var(--amethyst); }
.eyebrow .cat-ai { color: var(--sapphire); }
.eyebrow .cat-economics { color: var(--topaz); }
.eyebrow .cat-psychology { color: var(--ruby); }
.eyebrow .cat-philosophy { color: var(--aqua); }
h1 { margin: 2px 0 0; font-size: 1.6rem; letter-spacing: -0.02em; line-height: 1.15; }
.tools { display: flex; gap: 8px; }

.menu { position: relative; }
.menu-list {
  position: absolute; right: 0; top: calc(100% + 6px); z-index: 5;
  background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 4px;
  display: flex; flex-direction: column; min-width: 130px; box-shadow: 0 12px 32px var(--shadow);
}
.menu-list[hidden] { display: none; }
.menu-list button {
  appearance: none; background: none; border: 0; text-align: left; padding: 8px 12px; border-radius: 6px; cursor: pointer; font-size: 0.9rem;
}
.menu-list button:hover, .menu-list button:focus-visible { background: var(--panel-2); outline: none; }

/* ---------- clue bar ---------- */
.clue-bar {
  display: flex; align-items: center; gap: 8px; margin-bottom: 12px;
  background: var(--panel); border: 1px solid var(--line); border-left: 3px solid var(--primary);
  border-radius: var(--radius); padding: 8px 8px; min-height: 54px;
}
.clue-bar p { margin: 0; flex: 1; font-size: 1rem; }
.clue-bar .num { font-family: var(--mono); font-weight: 600; color: var(--primary); margin-right: 8px; }
.clue-bar .enum { color: var(--muted); font-family: var(--mono); font-size: 0.85em; margin-left: 4px; }
.clue-bar .explain { display: block; margin-top: 4px; font-size: 0.84rem; color: var(--muted); }
.clue-bar .explain strong { color: var(--emerald); font-weight: 600; }
.puzzle-note { margin: 4px 0 0; max-width: 46ch; font-size: 0.84rem; color: var(--muted); line-height: 1.4; }
.nav-btn {
  appearance: none; border: 1px solid var(--line); background: var(--bg-2); border-radius: 8px;
  width: 34px; height: 34px; font-size: 1.3rem; line-height: 1; cursor: pointer; flex-shrink: 0;
}
.nav-btn:hover { border-color: var(--primary); }

/* ---------- board ---------- */
.board-wrap { display: flex; justify-content: center; }
.board {
  --cols: 15; --rows: 15;
  container-type: inline-size;
  width: min(100%, calc(var(--cols) * 44px), calc((100svh - 330px) * var(--cols) / var(--rows)));
  min-width: min(100%, 300px);
  display: grid;
  grid-template-columns: repeat(var(--cols), 1fr);
  gap: 2px;
  outline: none;
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
}
.board:focus-visible { outline: none; }

.cell {
  position: relative; aspect-ratio: 1 / 1; border-radius: 3px;
  background: var(--cell-block);
}
.cell.letter {
  background: var(--cell-bg); color: var(--cell-text); cursor: pointer;
  box-shadow: 0 0 0 1px var(--cell-edge);
  transition: background .08s;
}
.cell.letter.word { background: var(--cell-word); }
.cell.letter.active { background: var(--cell-active); }
.cell .n {
  position: absolute; top: 1px; left: 2px;
  font-family: var(--mono); font-weight: 500; line-height: 1;
  font-size: max(7px, calc(100cqw / var(--cols) * 0.24));
  color: var(--cell-num); pointer-events: none;
}
.cell .ch {
  position: absolute; inset: 0; display: grid; place-items: center;
  font-family: var(--sans); font-weight: 600; text-transform: uppercase;
  font-size: calc(100cqw / var(--cols) * 0.56);
  padding-top: 8%;
  pointer-events: none;
}
.cell.wrong .ch { color: var(--cell-wrong); }
.cell.wrong::after {
  content: ""; position: absolute; left: 12%; right: 12%; top: 50%; height: 2px;
  background: var(--cell-wrong); transform: rotate(-35deg); opacity: .8; pointer-events: none;
}
.cell.revealed .ch { color: var(--cell-revealed); }
.cell.revealed::before {
  content: ""; position: absolute; right: 0; top: 0;
  border-style: solid; border-width: 0 7px 7px 0; border-color: transparent var(--cell-revealed) transparent transparent;
  border-top-right-radius: 3px; pointer-events: none;
}
.cell.correct .ch { color: #0d8a5f; }
.board.solved .cell.letter,
.board.solved .cell.letter.active,
.board.solved .cell.letter.word { background: var(--cell-solved); }

/* ---------- correct-word ripple and solve wave ---------- */
.cell.ripple, .cell.wave { z-index: 1; }
.cell.ripple { animation: cell-ripple 520ms cubic-bezier(.3, .7, .4, 1) var(--fx-delay, 0ms) both; }
.cell.wave { animation: cell-wave 700ms cubic-bezier(.3, .7, .4, 1) var(--fx-delay, 0ms) both; }
.cell.ripple .ch, .cell.wave .ch { animation: cell-letter 520ms ease-out var(--fx-delay, 0ms); }
@keyframes cell-ripple {
  0%   { transform: scale(1); box-shadow: 0 0 0 1px var(--cell-edge); }
  35%  { transform: scale(1.22) translateY(-2px); box-shadow: 0 0 0 2px var(--emerald), 0 6px 18px rgba(47, 211, 160, 0.55); }
  100% { transform: scale(1); box-shadow: 0 0 0 1px var(--cell-edge); }
}
@keyframes cell-wave {
  0%   { transform: scale(1); box-shadow: 0 0 0 1px var(--cell-edge); }
  40%  { transform: scale(1.16) rotate(-3deg); box-shadow: 0 0 0 2px var(--topaz), 0 6px 18px rgba(255, 196, 87, 0.5); }
  100% { transform: scale(1); box-shadow: 0 0 0 1px var(--cell-edge); }
}
@keyframes cell-letter {
  35% { color: #0d8a5f; }
}

/* ---------- banner ---------- */
.banner {
  margin: 14px auto 0; max-width: 520px; text-align: center; padding: 10px 14px; border-radius: var(--radius);
  border: 1px solid var(--line); background: var(--panel);
}
.banner.win { border-color: var(--emerald); color: var(--emerald); }
.banner.warn { border-color: var(--topaz); color: var(--topaz); }
.banner-actions { display: flex; justify-content: center; margin-top: 8px; }
.banner-next { border-color: var(--emerald); color: var(--text); }
.banner-next:hover { background: var(--emerald); border-color: var(--emerald); color: var(--bg); }
.all-done { font-weight: 600; }
/* The grid is locked once solved, so the on-screen keyboard steps aside. */
.play:has(.board.solved) .keyboard { display: none; }

/* ---------- clues ---------- */
.clues {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
  position: sticky; top: 12px;
}
.clue-col {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 12px 6px 8px 12px; max-height: calc(100svh - 140px); overflow-y: auto; scrollbar-width: thin;
}
.clue-col h2 {
  font-family: var(--mono); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--muted); margin: 0 0 8px; font-weight: 600;
}
.clues ol { list-style: none; margin: 0; padding: 0; }
.clues li {
  display: flex; gap: 8px; padding: 6px 8px; border-radius: 6px; cursor: pointer; font-size: 0.92rem;
  border-left: 3px solid transparent; line-height: 1.35;
}
.clues li:hover { background: var(--panel-2); }
.clues li .num { font-family: var(--mono); font-weight: 600; min-width: 1.6em; color: var(--muted); }
.clues li .enum { color: var(--muted); font-family: var(--mono); font-size: 0.82em; white-space: nowrap; }
.clues li.cross { background: var(--primary-faint); }
.clues li.current { background: var(--primary-soft); border-left-color: var(--primary); }
.clues li.current .num { color: var(--primary); }
.clues li.filled .txt { color: var(--muted); }
.clues li.filled .num { opacity: .6; }

/* ---------- on-screen keyboard ---------- */
.keyboard { display: none; margin-top: 14px; }
.kb-row { display: flex; justify-content: center; gap: 5px; margin-bottom: 6px; }
.key {
  appearance: none; border: 1px solid var(--line); background: var(--panel-2); border-radius: 6px;
  flex: 1 1 0; max-width: 42px; height: 46px; font-weight: 600; font-size: 1.05rem; cursor: pointer; padding: 0;
  touch-action: manipulation;
}
.key:active { background: var(--primary); color: var(--on-primary, #fff); }
.key.wide { max-width: 64px; flex-grow: 1.6; font-size: 0.85rem; }

/* ---------- dialogs ---------- */
dialog {
  border: 1px solid var(--line); border-radius: 14px; background: var(--panel); color: var(--text);
  padding: 0; width: min(560px, calc(100vw - 32px));
  box-shadow: 0 24px 64px var(--shadow);
}
dialog::backdrop { background: var(--backdrop); backdrop-filter: blur(2px); }
.dlg { padding: 20px; }
.dlg h2 { margin: 0 0 6px; font-size: 1.2rem; }
.dlg p { margin: 0 0 12px; color: var(--muted); font-size: 0.93rem; }
.dlg p strong { color: var(--text); }
.dlg textarea {
  width: 100%; resize: vertical; font-family: var(--mono); font-size: 0.8rem; line-height: 1.45;
  background: var(--bg); color: var(--emerald); border: 1px solid var(--line); border-radius: 8px; padding: 10px;
  word-break: break-all;
}
.dlg textarea:focus { outline: 2px solid var(--primary); outline-offset: 1px; }
.hint { min-height: 1.4em; margin: 8px 0 0 !important; font-size: 0.85rem !important; }
.hint.error { color: var(--ruby) !important; }
.hint.ok { color: var(--emerald) !important; }
.dlg-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 12px; }

/* ---------- themes ---------- */
/* Midnight is the :root default. theme.js sets data-theme on <html>. */
:root[data-theme="daylight"] {
  --bg: #f4f6fb; --bg-2: #ffffff; --panel: #ffffff; --panel-2: #eef1f8;
  --line: #d5dbe8; --text: #121826; --muted: #5a6680;
  --emerald: #0e9f6e; --sapphire: #2563eb; --amethyst: #7c3aed; --ruby: #dc2647; --topaz: #a86a00; --aqua: #0b8a9a;
  --cell-bg: #ffffff; --cell-text: #121826; --cell-word: #dbe7ff; --cell-active: #ffd166;
  --cell-edge: #aeb9cf; --cell-num: #4a5570; --cell-solved: #d1f5e6;
  --primary-soft: rgba(37, 99, 235, 0.13); --primary-faint: rgba(37, 99, 235, 0.05);
  --glow-1: rgba(37, 99, 235, 0.07); --glow-2: rgba(124, 58, 237, 0.05);
  --kb-bg: rgba(244, 246, 251, 0.94); --backdrop: rgba(20, 26, 40, 0.45); --shadow: rgba(20, 30, 60, 0.16);
  --overlay: rgba(244, 246, 251, 0.72);
}
:root[data-theme="emerald"] {
  --bg: #06120e; --bg-2: #0b1b16; --panel: #0f221c; --panel-2: #143027;
  --line: #24493d; --text: #e3f3ec; --muted: #86a99b;
  --primary: var(--emerald); --on-primary: #06120e;
  --primary-soft: rgba(47, 211, 160, 0.18); --primary-faint: rgba(47, 211, 160, 0.07);
  --glow-1: rgba(47, 211, 160, 0.10); --glow-2: rgba(79, 140, 255, 0.07);
  --cell-word: #c6f2e1; --cell-solved: #e4f9c6;
  --kb-bg: rgba(6, 18, 14, 0.94);
  --overlay: rgba(6, 18, 14, 0.62);
}
:root[data-theme="amethyst"] {
  --bg: #0f0b1a; --bg-2: #171127; --panel: #1b1430; --panel-2: #241b3e;
  --line: #3a2e63; --text: #ece6fb; --muted: #a398c4;
  --primary: var(--amethyst);
  --primary-soft: rgba(167, 123, 255, 0.20); --primary-faint: rgba(167, 123, 255, 0.08);
  --glow-1: rgba(167, 123, 255, 0.14); --glow-2: rgba(255, 92, 122, 0.07);
  --cell-word: #e2d6ff;
  --kb-bg: rgba(15, 11, 26, 0.94);
  --overlay: rgba(15, 11, 26, 0.62);
}
:root[data-theme="contrast"] {
  --bg: #000000; --bg-2: #000000; --panel: #000000; --panel-2: #1c1c1c;
  --line: #ffffff; --text: #ffffff; --muted: #e2e2e2;
  --emerald: #3dff9e; --sapphire: #4dc3ff; --amethyst: #d9a6ff; --ruby: #ff6b6b; --topaz: #ffe600; --aqua: #5ff3ff;
  --primary: #ffe600; --on-primary: #000000;
  --primary-soft: rgba(255, 230, 0, 0.24); --primary-faint: rgba(255, 230, 0, 0.10);
  --glow-1: transparent; --glow-2: transparent;
  --cell-bg: #ffffff; --cell-text: #000000; --cell-word: #9fdcff; --cell-active: #ffe600;
  --cell-edge: #ffffff; --cell-num: #000000; --cell-wrong: #c00000; --cell-revealed: #0030c0; --cell-solved: #b4ffcc;
  --kb-bg: #000000; --backdrop: rgba(0, 0, 0, 0.85); --shadow: rgba(0, 0, 0, 0.8);
  --overlay: rgba(0, 0, 0, 0.85);
}
:root[data-theme="contrast"] .cell .n { font-weight: 600; }
:root[data-theme="contrast"] .btn, :root[data-theme="contrast"] .tile, :root[data-theme="contrast"] .picker-tabs { border-width: 2px; }

.theme-switching *, .theme-switching *::before, .theme-switching *::after { transition: none !important; }

/* ---------- theme menu ---------- */
.icon-btn { padding: 6px; width: 36px; height: 36px; display: inline-grid; place-items: center; }
.icon-btn svg { width: 20px; height: 20px; display: block; }
.theme-menu .menu-list { min-width: 210px; max-height: calc(100svh - 80px); overflow-y: auto; overscroll-behavior: contain; }
.menu-heading {
  margin: 4px 12px 2px; font-family: var(--mono); font-size: 0.68rem; text-transform: uppercase;
  letter-spacing: 0.1em; color: var(--muted);
}
.theme-menu .menu-list button { display: flex; align-items: center; gap: 10px; }
.theme-menu .menu-list button[aria-checked="true"] { color: var(--primary); }
.theme-menu .menu-list button { padding-top: 7px; padding-bottom: 7px; }
.theme-menu .menu-list button[aria-checked="true"]::after { content: "\2713"; margin-left: auto; font-size: 0.9em; }
.menu-sep { height: 1px; background: var(--line); margin: 4px 6px; }
.theme-menu .menu-list { width: 300px; max-width: calc(100vw - 32px); }
.bg-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 2px; }
.bg-grid button { min-width: 0; }
.swatch {
  width: 18px; height: 18px; border-radius: 5px; flex-shrink: 0;
  border: 1px solid rgba(127, 127, 127, 0.45);
}
.sw-system { background: linear-gradient(135deg, #0b0f17 0 50%, #f4f6fb 50% 100%); }
.sw-midnight { background: linear-gradient(135deg, #0b0f17 0 55%, #4f8cff 55% 100%); }
.sw-daylight { background: linear-gradient(135deg, #f4f6fb 0 55%, #2563eb 55% 100%); }
.sw-emerald { background: linear-gradient(135deg, #06120e 0 55%, #2fd3a0 55% 100%); }
.sw-amethyst { background: linear-gradient(135deg, #0f0b1a 0 55%, #a77bff 55% 100%); }
.sw-contrast { background: linear-gradient(135deg, #000000 0 55%, #ffe600 55% 100%); }
.sw-bg-none { background: repeating-linear-gradient(135deg, transparent 0 4px, rgba(127, 127, 127, 0.35) 4px 5px); }
.sw-bg-forest { background: linear-gradient(180deg, #c9d6dc 0%, #8fa3a8 45%, #24352f 46%, #0f1a16 100%); }
.sw-bg-mountains { background: linear-gradient(180deg, #7fc7e8 0%, #f6c66b 40%, #e98a8a 62%, #8a5a7d 100%); }
.sw-bg-space { background: radial-gradient(circle at 60% 55%, #c9c4e6 0 6%, transparent 30%), linear-gradient(180deg, #2b3550 0%, #0c1020 100%); }
.sw-bg-cycle { background: conic-gradient(#2fd3a0, #4f8cff, #a77bff, #ff5c7a, #ffc457, #2fd3a0); }
.sw-bg-waterfall { background: linear-gradient(90deg, #12251c 0 38%, #dfeee8 38% 52%, #12251c 52% 100%); }
.sw-bg-ocean { background: radial-gradient(circle at 30% 40%, #e8f4f2 0 12%, transparent 30%), linear-gradient(160deg, #1f5f5b 0%, #0b2f33 100%); }
.sw-bg-sunrise { background: linear-gradient(180deg, #f7d9a8 0%, #f2b36b 45%, #9bb08a 46%, #4f6b4a 100%); }
.sw-bg-sunset { background: linear-gradient(180deg, #f6a04d 0%, #e5623d 45%, #2e4a6b 46%, #13243a 100%); }
.sw-bg-wildlife { background: radial-gradient(circle at 45% 50%, #e47b2c 0 26%, transparent 28%), linear-gradient(180deg, #8fb3d6 0%, #2c5f93 100%); }
.sw-bg-safari { background: linear-gradient(180deg, #e9c98f 0%, #d7a95c 55%, #8a6a3a 56%, #5b4426 100%); }
.sw-bg-horses { background: linear-gradient(180deg, #a9cdea 0%, #d9e8f4 45%, #6e9b45 46%, #4b7330 100%); }
.sw-bg-cats { background: radial-gradient(circle at 50% 58%, #f2f2f2 0 18%, #1b1b1b 19% 34%, transparent 35%), linear-gradient(180deg, #3fae8a 0%, #2b8a6c 100%); }

/* ---------- photo backgrounds (Unsplash) ---------- */
/* A fixed layer behind the page, so it also works on iOS where
   background-attachment: fixed is ignored. The theme's --overlay tints it
   and keeps text readable. Images load only when a background is chosen. */
:root[data-bg] body::before {
  content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background-color: var(--bg);
  background-image: linear-gradient(var(--overlay), var(--overlay)), var(--bg-photo);
  background-size: cover;
  background-position: var(--bg-pos, center);
  background-repeat: no-repeat;
}
/* The photo URL and focal point are set on <html> by theme.js
   (--bg-photo, --bg-pos), which also picks a portrait crop on phones. */

/* Crossfade layer used when the background changes in Cycle mode */
.bg-fade {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background-size: cover; background-repeat: no-repeat;
  opacity: 1; transition: opacity 1.6s ease;
}
.bg-fade.out { opacity: 0; }

.credit { margin-top: 6px !important; font-size: 0.78rem; }
.credit a { color: inherit; text-decoration: underline; text-decoration-color: var(--line); text-underline-offset: 2px; }
.credit a:hover { color: var(--text); text-decoration-color: currentColor; }

/* ---------- footer ---------- */
.foot { max-width: 1200px; margin: 0 auto; padding: 8px 16px 28px; color: var(--muted); font-size: 0.82rem; }
.foot p { margin: 0; }
.noscript { text-align: center; padding: 20px; }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .clues { position: static; }
  .clue-col { max-height: 320px; }
  .board { width: min(100%, calc(var(--cols) * 44px)); }
}
@media (max-width: 560px) {
  .top { padding-top: 10px; }
  .brand-name { font-size: 1rem; }
  .top-actions .btn { padding: 6px 10px; font-size: 0.82rem; }
  .top-actions .icon-btn { padding: 6px; width: 34px; height: 34px; }
  .top-actions { gap: 6px; margin-left: auto; }
  .top { flex-wrap: wrap; row-gap: 8px; }
  .hide-sm { display: none; }
  .timer { min-width: 0; padding: 5px 8px; font-size: 0.85rem; }
  h1 { font-size: 1.3rem; }
  .clues { grid-template-columns: 1fr; }
  .board { gap: 1px; }
  .cell .n { top: 0; left: 1px; }
}
@media (pointer: coarse) {
  .keyboard {
    display: block; position: sticky; bottom: 0; z-index: 4;
    margin: 14px -16px 0; padding: 8px 10px calc(4px + env(safe-area-inset-bottom));
    background: var(--kb-bg); border-top: 1px solid var(--line);
    backdrop-filter: blur(6px);
  }
  .clues li { padding: 8px; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
  .cell.ripple, .cell.wave, .cell.ripple .ch, .cell.wave .ch { animation: none !important; }
}