:root {
  color-scheme: light;
  --bg: #f5f7f4;
  --panel: #ffffff;
  --text: #142018;
  --muted: #607064;
  --line: #cdd7cf;
  --line-strong: #9eb0a4;
  --accent: #235c96;
  --accent-pressed: #184977;
  --selected: #dcecff;
  --selected-border: #2d6fb0;
  --good: #cdeed7;
  --good-border: #2f8b4f;
  --bad: #ffd7d2;
  --bad-border: #b84235;
  --locked: #eef0ed;
  --shadow: 0 12px 30px rgba(20, 32, 24, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
select {
  font: inherit;
}

button {
  min-height: 44px;
  border: 1px solid var(--accent);
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  padding: 0 18px;
  font-weight: 700;
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

button:not(:disabled):active {
  background: var(--accent-pressed);
}

select {
  min-height: 44px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: #fff;
  color: var(--text);
  padding: 0 34px 0 12px;
}

.app {
  width: min(1180px, 100%);
  margin: 0 auto;
  padding: 18px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: end;
  margin-bottom: 14px;
}

h1 {
  margin: 0;
  font-size: clamp(1.7rem, 4vw, 2.7rem);
  line-height: 1.05;
}

p {
  margin: 8px 0 0;
  color: var(--muted);
}

.controls,
.actionbar {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.controls label {
  color: var(--muted);
  font-weight: 700;
}

.statsTable {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  padding: 12px 14px;
  box-shadow: var(--shadow);
}

.finalResults span {
  display: block;
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 700;
}

.finalResults strong {
  display: block;
  margin-top: 3px;
  font-size: 1.35rem;
}

.finalResults {
  margin-bottom: 14px;
}

.roundResults {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.statsTable {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-variant-numeric: tabular-nums;
}

.statsTable th,
.statsTable td {
  padding: 8px 12px;
  text-align: right;
  white-space: nowrap;
}

.statsTable th:first-child {
  text-align: left;
}

.statsTable .roundCell {
  cursor: pointer;
}

.statsTable .roundCell:hover {
  background: #f1f8ff;
}

.statsTable .inspected {
  background: #e4f4ff;
  color: #123a50;
}

.boardShell {
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
  -webkit-overflow-scrolling: touch;
}

.matrix {
  --cell-size: 46px;
  display: grid;
  grid-template-columns: 42px repeat(var(--players), var(--cell-size)) 70px;
  width: max-content;
  min-width: 100%;
  padding: 12px;
  gap: 3px;
}

.corner,
.axis,
.elo,
.cell {
  min-width: 0;
  height: var(--cell-size);
  display: grid;
  place-items: center;
  border-radius: 6px;
}

.axis,
.elo {
  color: var(--muted);
  font-weight: 800;
}

.rowAxis {
  justify-content: end;
  padding-right: 9px;
}

.elo {
  justify-content: start;
  padding-left: 10px;
  font-variant-numeric: tabular-nums;
}

.cell {
  border: 1px solid var(--line);
  background: #fbfcfb;
  color: var(--text);
  font-size: 0.85rem;
  font-variant-numeric: tabular-nums;
  touch-action: manipulation;
  position: relative;
  padding: 0;
}

.cell:disabled {
  opacity: 1;
}

.cell.clickable {
  cursor: pointer;
}

.cell.clickable:focus-visible {
  outline: 3px solid rgba(35, 92, 150, 0.35);
  outline-offset: 1px;
}

.cell.diagonal {
  border-color: transparent;
  background: transparent;
}

.cell.locked {
  background: #fbfcfb;
  color: var(--text);
  border-color: var(--line-strong);
  border-style: dashed;
}

.cell.selected {
  background: var(--selected);
  border-color: var(--selected-border);
  box-shadow: inset 0 0 0 1px var(--selected-border);
}

.cell.correct,
.cell.missing {
  background: var(--good);
  border-color: var(--good-border);
  box-shadow: inset 0 0 0 2px var(--good-border);
}

.cell.unchanged {
  background: #fff4c7;
  border-color: #b68a1f;
  box-shadow: inset 0 0 0 2px #b68a1f;
}

.cell.wrong {
  background: var(--bad);
  border-color: var(--bad-border);
  box-shadow: inset 0 0 0 2px var(--bad-border);
}

.actionbar {
  justify-content: flex-end;
  margin-top: 14px;
}

#clearButton {
  background: #fff;
  color: var(--accent);
}

@media (max-width: 760px) {
  .app {
    padding: 12px;
  }

  .topbar {
    align-items: stretch;
    flex-direction: column;
  }

  .controls,
  .actionbar {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .controls label {
    grid-column: 1 / -1;
  }

  .matrix {
    --cell-size: 40px;
    grid-template-columns: 34px repeat(var(--players), var(--cell-size)) 62px;
    padding: 8px;
  }

  .cell {
    font-size: 0.76rem;
  }
}