/* Tages-Sudoku – game specific styles (shared styles: ../shared/base.css) */
/* Large numbers and buttons on purpose: easy to read and tap for everyone. */

:root {
  --cell-given: #0d1821;
  --cell-user: #344966;
  --cell-select: #b4cded;
  --cell-peer: #e4ebf3;
  --cell-same: #dfe6c8;
  --cell-error: #b8433f;
  --grid-thin: #b9c6d6;
  --grid-thick: #0d1821;
}
@media (prefers-color-scheme: dark) {
  :root {
    --cell-given: #f0f4ef;
    --cell-user: #b4cded;
    --cell-select: #344966;
    --cell-peer: #1c2c42;
    --cell-same: #3b4a2e;
    --cell-error: #ef7a74;
    --grid-thin: #2e4260;
    --grid-thick: #b4cded;
  }
}
html.halloween {
  --cell-given: #f0f4ef;
  --cell-user: #b4cded;
  --cell-select: #344966;
  --cell-peer: #1c2c42;
  --cell-same: #3b4a2e;
  --cell-error: #ef7a74;
  --grid-thin: #2e4260;
  --grid-thick: #b4cded;
}

/* difficulty tabs */
.levels { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; margin: 4px 0 10px; }
.levels button {
  padding: 10px 6px;
  font: inherit;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  background: var(--card);
  border: 2px solid var(--line);
  border-radius: 12px;
  cursor: pointer;
}
.levels button[aria-selected="true"] { color: var(--on-accent); background: var(--accent); border-color: var(--accent); }
.levels button .done { margin-left: 4px; }

/* the grid */
.board {
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  width: 100%;
  max-width: 500px;
  margin: 0 auto;
  aspect-ratio: 1;
  background: var(--card);
  border: 3px solid var(--grid-thick);
  border-radius: 8px;
  overflow: hidden;
  user-select: none;
  -webkit-user-select: none;
}
.cell {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  font: 600 clamp(1.25rem, 6.4vw, 2rem) / 1 "DM Sans", system-ui, sans-serif;
  color: var(--cell-user);
  background: transparent;
  border: 0 solid var(--grid-thin);
  border-right-width: 1px;
  border-bottom-width: 1px;
  cursor: pointer;
}
.cell:nth-child(9n) { border-right-width: 0; }
.cell:nth-child(n + 73) { border-bottom-width: 0; }
.cell.bx { border-right: 2px solid var(--grid-thick); }       /* thick line after columns 3 and 6 */
.cell.by { border-bottom: 2px solid var(--grid-thick); }      /* thick line after rows 3 and 6 */
.cell.given { color: var(--cell-given); font-weight: 700; cursor: default; }
.cell.peer { background: var(--cell-peer); }
.cell.same { background: var(--cell-same); }
.cell.selected { background: var(--cell-select); }
.cell.error { color: var(--cell-error); }
.cell.error::after {
  content: "";
  position: absolute;
  left: 22%;
  right: 22%;
  bottom: 12%;
  height: 2px;
  background: var(--cell-error);
}
.cell:focus-visible { outline: 3px solid var(--accent); outline-offset: -3px; z-index: 1; }

/* pencil marks: 3 x 3 small numbers */
.notes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  width: 100%;
  height: 100%;
  padding: 2px;
  font-size: clamp(0.5rem, 2.2vw, 0.78rem);
  font-weight: 600;
  color: var(--muted);
}
.notes span { display: flex; align-items: center; justify-content: center; }

.board.solved .cell { cursor: default; }
.board.solved .cell:not(.given) { animation: solved 0.6s ease both; }
@keyframes solved { 50% { background: var(--good); } }
@media (prefers-reduced-motion: reduce) { .board.solved .cell:not(.given) { animation: none; } }

/* controls: big buttons */
.controls { max-width: 500px; margin: 12px auto 0; }
.tools { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; }
.tool {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 8px 4px;
  font: inherit;
  font-size: 0.85rem;
  color: var(--text);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  cursor: pointer;
}
.tool span { font-size: 1.35rem; line-height: 1.2; }
.tool[aria-pressed="true"] { background: var(--good); color: #0d1821; border-color: var(--good); }
.tool b { font-weight: 700; }
.numpad { display: grid; grid-template-columns: repeat(9, 1fr); gap: 5px; margin-top: 8px; }
.num {
  position: relative;
  padding: 12px 0 14px;
  font: 700 clamp(1.3rem, 6vw, 1.8rem) / 1 "DM Sans", system-ui, sans-serif;
  color: var(--on-accent);
  background: var(--accent);
  border: 0;
  border-radius: 10px;
  cursor: pointer;
}
.num small { position: absolute; left: 0; right: 0; bottom: 3px; font-size: 0.6rem; font-weight: 600; opacity: 0.8; }
.num:disabled { opacity: 0.3; cursor: default; }

.result {
  max-width: 500px;
  margin: 14px auto 0;
  padding: 20px;
  text-align: center;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
}
.result h2 { font: 700 1.5rem "Outfit", system-ui, sans-serif; margin: 0 0 4px; }
.result .time { font: 800 2.4rem "Outfit", system-ui, sans-serif; color: var(--accent); }
.result .actions { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-top: 12px; }

/* ---------- printing: only the clean puzzle sheet ---------- */
.print-sheet { display: none; }
@media print {
  @page { margin: 18mm; }
  body > *:not(.print-sheet) { display: none !important; }
  html, body { background: #fff !important; }
  body::before, body::after { display: none !important; }
  .print-sheet { display: block !important; color: #000; font-family: "DM Sans", Arial, sans-serif; }
  .print-sheet h2 { font: 700 20pt "Outfit", Arial, sans-serif; margin: 0 0 2mm; }
  .print-sheet p { margin: 0 0 6mm; font-size: 11pt; }
  .print-grid { display: grid; grid-template-columns: repeat(9, 1fr); width: 150mm; height: 150mm; border: 1mm solid #000; }
  .print-grid div {
    display: flex; align-items: center; justify-content: center;
    font-size: 22pt; font-weight: 700;
    border-right: 0.2mm solid #777; border-bottom: 0.2mm solid #777;
  }
  .print-grid div:nth-child(9n) { border-right: 0; }
  .print-grid div:nth-child(n + 73) { border-bottom: 0; }
  .print-grid div.bx { border-right: 0.8mm solid #000; }
  .print-grid div.by { border-bottom: 0.8mm solid #000; }
  .print-sheet footer { margin-top: 6mm; font-size: 9pt; color: #444; }
}

/* statistics table */
.stat-table { width: 100%; border-collapse: collapse; margin: 8px 0; font-size: 0.95rem; }
.stat-table th, .stat-table td { padding: 8px 6px; text-align: center; border-bottom: 1px solid var(--line); }
.stat-table th { color: var(--muted); font-weight: 500; }
.stat-table td:first-child { text-align: left; font-weight: 700; }