.game-screen {
  width: 100%;
  align-self: stretch;
}

.game-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 0 2px 14px;
  border-bottom: 1px solid var(--line);
}

.brand--compact .brand-mark {
  width: 38px;
  height: 38px;
}

.text-button,
.quiet-button {
  color: var(--ink-muted);
  background: transparent;
  font-size: 0.78rem;
  font-weight: 750;
}

.text-button:hover,
.quiet-button:hover {
  color: var(--coral-dark);
}

.game-layout {
  display: grid;
  grid-template-columns: 210px minmax(0, 1fr);
  gap: clamp(28px, 5vw, 54px);
  padding-top: 20px;
}

.game-sidebar {
  padding-top: 4px;
}

.round-label {
  color: var(--coral-dark);
  font-size: 0.68rem;
  font-weight: 850;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.game-sidebar h2 {
  margin: 0 0 8px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.7rem;
  font-weight: 500;
  letter-spacing: -0.03em;
}

.match-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.match-tags > span {
  padding: 5px 9px;
  border-radius: 999px;
  color: var(--ink-muted);
  background: var(--surface-soft);
  font-size: 0.67rem;
  font-weight: 800;
}

.match-tags .difficulty-badge {
  color: var(--color-ink);
  background: var(--color-primary-soft);
}

.win-rule {
  margin: 0;
  color: var(--ink-muted);
  font-size: 0.82rem;
}

.status-card {
  display: flex;
  align-items: center;
  gap: 13px;
  margin: 18px 0 13px;
  padding: 11px 12px;
  border: 1px solid color-mix(in srgb, var(--color-primary-hover) 34%, transparent);
  border-radius: var(--radius-md);
  background: var(--color-primary-soft);
}

.status-card.is-thinking {
  border-color: color-mix(in srgb, var(--color-secondary) 34%, transparent);
  background: var(--color-secondary-soft);
}

.status-card.is-thinking .status-dot {
  background: var(--color-secondary);
  animation: pulse 1s ease-in-out infinite;
}

.status-card.is-finished {
  border-color: var(--line);
  background: var(--surface-soft);
}

.status-dot {
  width: 10px;
  height: 10px;
  flex: none;
  border-radius: 50%;
  background: var(--color-primary-hover);
  box-shadow: 0 0 0 5px color-mix(in srgb, var(--color-primary) 18%, transparent);
}

.status-card strong {
  font-size: 0.86rem;
}

.scoreboard {
  border-top: 1px solid var(--line);
}

.score-row {
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--line);
}

.score-row > div {
  display: flex;
  align-items: center;
  gap: 11px;
}

.score-row > strong {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.5rem;
  font-weight: 500;
}

.score-row p,
.score-row p strong,
.score-row p span {
  display: block;
  margin: 0;
}

.score-row p strong {
  font-size: 0.8rem;
}

.score-row p span {
  margin-top: 2px;
  color: var(--ink-muted);
  font-size: 0.67rem;
}

.score-symbol {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: var(--surface-soft);
  font-size: 1.35rem;
  font-weight: 700;
}

.score-symbol--x {
  color: var(--coral);
  background: var(--color-attention-soft);
}

.score-symbol--o {
  color: var(--color-secondary);
  background: var(--color-secondary-soft);
}

.sidebar-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 13px;
  margin-top: 16px;
}

.secondary-button {
  min-height: 42px;
  border: 1px solid var(--ink);
  border-radius: 12px;
  color: var(--ink);
  background: transparent;
  font-size: 0.78rem;
  font-weight: 800;
  transition: color 160ms ease, background 160ms ease;
}

.secondary-button:hover {
  color: white;
  background: var(--ink);
}

.board-area {
  width: 100%;
  max-width: 550px;
  justify-self: center;
}

.game-screen[data-size="3"] .board-area { max-width: 440px; }
.game-screen[data-size="5"] .board-area { max-width: 490px; }
.game-screen[data-size="7"] .board-area { max-width: 525px; }
.game-screen[data-size="9"] .board-area { max-width: 550px; }

.turn-strip {
  min-height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 18px;
}

.turn-player {
  display: flex;
  align-items: center;
  gap: 11px;
}

.turn-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  color: var(--coral);
  background: var(--color-attention-soft);
  font-size: 2rem;
  font-weight: 600;
  line-height: 1;
}

.turn-player p,
.turn-player span,
.turn-player strong {
  display: block;
  margin: 0;
}

.turn-player p > span {
  color: var(--ink-muted);
  font-size: 0.67rem;
}

.turn-player strong {
  margin-top: 2px;
  font-size: 0.86rem;
}

.move-count {
  margin: 8px 0 0;
  color: var(--ink-muted);
  font-size: 0.73rem;
  font-weight: 700;
  text-align: center;
}

.board-wrap {
  width: 100%;
  padding: clamp(8px, 1.7vw, 14px);
  border: 1px solid color-mix(in srgb, var(--color-ink) 11%, transparent);
  border-radius: clamp(20px, 3vw, 30px);
  background: color-mix(in srgb, var(--color-surface-raised) 82%, transparent);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(8px);
}

.game-board {
  --board-size: 3;
  --board-gap: 10px;
  --cell-radius: 15px;
  --mark-stroke: 7px;
  display: grid;
  grid-template-columns: repeat(var(--board-size), minmax(0, 1fr));
  gap: var(--board-gap);
  width: 100%;
  aspect-ratio: 1;
  padding: 5px;
  touch-action: manipulation;
}

.game-board[data-size="5"] {
  --board-gap: 7px;
  --cell-radius: 12px;
  --mark-stroke: 6px;
}

.game-board[data-size="7"] {
  --board-gap: 5px;
  --cell-radius: 9px;
  --mark-stroke: 4px;
}

.game-board[data-size="9"] {
  --board-gap: 4px;
  --cell-radius: 6px;
  --mark-stroke: 3px;
}

.cell {
  position: relative;
  display: grid;
  place-items: center;
  min-width: 0;
  min-height: 0;
  padding: 0;
  border: 1px solid color-mix(in srgb, var(--color-ink) 10%, transparent);
  border-radius: var(--cell-radius);
  background: var(--surface-soft);
  cursor: pointer;
  overflow: hidden;
  transition: background 120ms ease, border-color 120ms ease, transform 120ms ease;
}

.cell:hover:not(:disabled) {
  border-color: var(--color-primary-hover);
  background: var(--color-primary-soft);
  transform: translateY(-1px);
}

.cell:disabled {
  cursor: default;
}

.cell.is-last {
  border-color: color-mix(in srgb, var(--color-ink) 28%, transparent);
}

.cell.is-winning {
  border-color: var(--color-primary-hover);
  background: color-mix(in srgb, var(--color-primary) 48%, transparent);
  animation: winner 640ms ease both;
}

.cell[data-mark="X"]::before,
.cell[data-mark="X"]::after {
  content: "";
  position: absolute;
  width: 55%;
  height: var(--mark-stroke);
  border-radius: 999px;
  background: var(--coral);
  animation: draw-x 230ms cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

.cell[data-mark="X"]::before {
  transform: rotate(45deg);
}

.cell[data-mark="X"]::after {
  transform: rotate(-45deg);
}

.cell[data-mark="O"]::before {
  content: "";
  position: absolute;
  width: 46%;
  aspect-ratio: 1;
  border: var(--mark-stroke) solid var(--color-secondary);
  border-radius: 50%;
  animation: draw-o 260ms cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

.cell-mark-label {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.board-caption {
  margin: 14px 0 0;
  color: var(--ink-muted);
  font-size: 0.72rem;
  text-align: center;
}

/* Result dialog */
.result-overlay {
  position: fixed;
  z-index: 10;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 20px;
  background: var(--color-overlay);
  backdrop-filter: blur(8px);
  animation: fade-in 180ms ease both;
}

.result-dialog {
  width: min(390px, 100%);
  padding: 30px;
  border-radius: var(--radius-xl);
  background: var(--surface);
  box-shadow: 0 35px 90px color-mix(in srgb, var(--color-ink) 32%, transparent);
  text-align: center;
  animation: dialog-in 280ms cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

.result-symbol {
  width: 68px;
  height: 68px;
  display: grid;
  place-items: center;
  margin: 0 auto 16px;
  border-radius: 24px;
  color: var(--coral);
  background: var(--color-attention-soft);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 3.7rem;
  line-height: 1;
}

.result-symbol.is-computer {
  color: var(--color-secondary);
  background: var(--color-secondary-soft);
}

.result-symbol.is-draw {
  color: var(--ink-muted);
  background: var(--surface-soft);
  font-size: 2.4rem;
}

.result-kicker {
  margin: 0 0 9px;
  color: var(--coral-dark);
  font-size: 0.69rem;
  font-weight: 850;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.result-dialog h2 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 2.1rem;
  font-weight: 500;
  letter-spacing: -0.04em;
}

.result-dialog > p:not(.result-kicker) {
  margin: 11px auto 21px;
  color: var(--ink-muted);
  line-height: 1.6;
}

.result-actions {
  display: flex;
  align-items: center;
  gap: 15px;
}

.result-actions .primary-button {
  flex: 1;
}

@keyframes draw-x {
  from { opacity: 0; scale: 0.45; }
  to { opacity: 1; scale: 1; }
}

@keyframes draw-o {
  from { opacity: 0; scale: 0.45; rotate: -35deg; }
  to { opacity: 1; scale: 1; rotate: 0; }
}

@keyframes pulse {
  0%, 100% { opacity: 0.45; scale: 0.8; }
  50% { opacity: 1; scale: 1; }
}

@keyframes winner {
  0%, 100% { transform: translateY(0); }
  45% { transform: translateY(-4px); }
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes dialog-in {
  from { opacity: 0; transform: translateY(20px) scale(0.96); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}