:root {
  --ink: #1c1915;
  --paper: #f4efe6;
  --board: #efe6d6;
  --line: #1c1915;
  --x: #c4492c;
  --o: #1f6f6a;
  --muted: #6d6458;
  --win: #f3d27a;
  --shadow: 0 24px 60px rgba(28, 25, 21, 0.16);
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Iowan Old Style", Palatino, "Palatino Linotype", Georgia, serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, #fffaf2 0, transparent 42%),
    linear-gradient(160deg, #e7dcc8, #f7f1e7 48%, #d9cbb6);
}

button,
.board {
  font: inherit;
}

.stage {
  width: min(640px, calc(100% - 32px));
  margin: 0 auto;
  padding: 48px 0 64px;
}

.mast {
  margin-bottom: 20px;
}

.eyebrow {
  margin: 0 0 6px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: 0.72rem;
  color: var(--muted);
}

h1 {
  margin: 0;
  font-weight: 600;
  font-size: clamp(2.6rem, 6vw, 4rem);
  letter-spacing: -0.03em;
}

.status {
  min-height: 1.6em;
  margin: 8px 0 0;
  font-size: 1.2rem;
}

.panel {
  background: rgba(255, 250, 242, 0.72);
  border: 1px solid rgba(28, 25, 21, 0.08);
  border-radius: 28px;
  box-shadow: var(--shadow);
  padding: 22px;
}

.toolbar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin-bottom: 18px;
}

.modes {
  display: flex;
  gap: 6px;
  padding: 4px;
  background: rgba(28, 25, 21, 0.06);
  border-radius: 999px;
}

.mode,
.actions button {
  border: 0;
  cursor: pointer;
  border-radius: 999px;
}

.mode {
  background: transparent;
  color: var(--ink);
  padding: 8px 14px;
}

.mode.is-active {
  background: var(--ink);
  color: var(--paper);
}

.scores {
  display: flex;
  gap: 16px;
  margin: 0;
}

.scores p {
  margin: 0;
  text-align: center;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.scores strong {
  display: block;
  margin-top: 2px;
  font-size: 1.35rem;
  letter-spacing: 0;
  color: var(--ink);
}

.board {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  background: var(--line);
  padding: 10px;
  border-radius: 18px;
}

.cell {
  aspect-ratio: 1;
  border: 0;
  border-radius: 12px;
  background: var(--board);
  color: var(--ink);
  font-size: clamp(2.8rem, 9vw, 4.6rem);
  cursor: pointer;
  line-height: 1;
}

.cell:hover:not(:disabled) {
  background: #fff8ec;
}

.cell:focus-visible,
button:focus-visible {
  outline: 3px solid var(--o);
  outline-offset: 3px;
}

.cell.mark-x {
  color: var(--x);
}

.cell.mark-o {
  color: var(--o);
}

.cell.is-win {
  background: var(--win);
}

.cell:disabled {
  cursor: default;
}

.actions {
  display: flex;
  gap: 10px;
  margin-top: 16px;
}

.actions button {
  background: var(--ink);
  color: var(--paper);
  padding: 12px 18px;
}

.actions .ghost {
  background: transparent;
  color: var(--ink);
  box-shadow: inset 0 0 0 1.5px rgba(28, 25, 21, 0.28);
}

@media (max-width: 560px) {
  .toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .scores {
    justify-content: space-between;
  }
}