:root {
  --bg: #14161c;
  --panel: #1d2029;
  --text: #eef1f6;
  --muted: #b9c0cd;
  --accent: #f0c75e;
  --line: #3a4050;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: 100vh;
  min-height: 100svh;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  padding: env(safe-area-inset-top) max(10px, env(safe-area-inset-right)) env(safe-area-inset-bottom) max(10px, env(safe-area-inset-left));
  -webkit-tap-highlight-color: transparent;
}
[hidden] { display: none !important; }
button {
  font: inherit;
  color: var(--text);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  min-height: 44px;
  padding: 6px 12px;
  cursor: pointer;
  touch-action: manipulation;
}
button[aria-pressed="true"] { border-color: var(--accent); box-shadow: inset 0 0 0 2px var(--accent); }
button:disabled { opacity: 0.55; cursor: default; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
kbd {
  font: 600 0.8em ui-monospace, SFMono-Regular, Menlo, monospace;
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 0 4px;
  background: #11131a;
}
.top { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 6px 12px; max-width: 980px; margin: 8px auto 4px; }
h1 { font-size: 1.35rem; margin: 0; letter-spacing: 0.02em; color: var(--accent); }
.modes { display: flex; flex-wrap: wrap; gap: 6px; }
.modes button { min-height: 44px; padding: 4px 10px; font-size: 0.95rem; }
.notice { max-width: 980px; margin: 6px auto; padding: 8px 12px; border-radius: 10px; background: #2c2a1e; border: 1px solid #6b5d2a; color: var(--text); }
.newday { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; justify-content: space-between; }
main {
  max-width: 980px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  grid-template-areas: "info" "board" "controls";
  gap: 6px;
}
.info { grid-area: info; }
.board-wrap { grid-area: board; display: flex; justify-content: center; }
.controls { grid-area: controls; }
.puzzle-title { margin: 0; font-weight: 600; }
.streak { margin: 0; color: var(--muted); font-size: 0.95rem; }
.levels { display: flex; gap: 4px; }
.levels button { min-height: 44px; }
.practice-controls { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-top: 4px; }
.board {
  width: 100%;
  max-width: min(640px, calc((100svh - 230px) * 1.48));
  min-width: 280px;
  height: auto;
  aspect-ratio: 107 / 72;
  touch-action: manipulation;
  user-select: none;
  -webkit-user-select: none;
  border-radius: 8px;
}
.board:focus-visible { outline: 3px solid var(--accent); }
.board text { font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif; }
.board .cell { cursor: pointer; }
.board.done { filter: saturate(1.15) brightness(1.06); }
.palette { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; }
.brush { display: flex; flex-direction: column; align-items: center; gap: 2px; padding: 6px 4px; font-size: 0.9rem; }
.brush .sw { width: 26px; height: 26px; }
.actions { display: flex; gap: 6px; margin-top: 6px; }
.actions button { flex: 1; }
.status { min-height: 2.9em; margin: 6px 0 0; color: var(--muted); font-size: 0.95rem; }
.defs { position: absolute; width: 0; height: 0; overflow: hidden; }
dialog {
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 14px;
  max-width: min(92vw, 520px);
  padding: 16px 20px;
}
dialog::backdrop { background: rgba(0, 0, 0, 0.6); }
dialog h2 { margin-top: 0; color: var(--accent); }
dialog ul { padding-left: 1.2em; }
.win-art .mini { width: 160px; display: block; margin: 0 auto; }
.gallery { max-width: 980px; margin: 0 auto; }
.gallery-list { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(96px, 1fr)); gap: 12px; }
.gallery-list li { display: flex; flex-direction: column; align-items: center; gap: 4px; color: var(--muted); font-size: 0.9rem; }
.gallery-list .mini { width: 100%; max-width: 120px; }

/* Phones held sideways and other short, wide screens: board beside controls. */
@media (orientation: landscape) and (max-height: 560px) {
  body { font-size: 15px; }
  .top { margin-top: 4px; }
  main {
    grid-template-columns: auto minmax(220px, 300px);
    grid-template-areas: "board info" "board controls";
    align-items: start;
  }
  .board { max-width: calc((100svh - 80px) * 1.48); min-width: 0; }
  .brush { font-size: 0.8rem; }
  .status { min-height: 0; }
}
@media (min-width: 900px) and (min-height: 600px) {
  main {
    grid-template-columns: minmax(0, 1fr) 300px;
    grid-template-areas: "info info" "board controls";
    align-items: start;
  }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}