:root {
  --board-bg: #1a1510;
  --square-light: #e8dcc8;
  --square-dark: #c4a574;
  --square-hover: rgba(255, 255, 255, 0.35);
  --piece-white: #f5f2eb;
  --piece-black: #1c1914;
  --accent: #8b6914;
  --text: #f2ebe0;
  --muted: #a89880;
  --win: #3d9c5c;
  --panel: rgba(28, 24, 18, 0.92);
  --radius: 14px;
  font-size: clamp(15px, 2.2vw, 18px);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", system-ui, sans-serif;
  color: var(--text);
  background:
    radial-gradient(ellipse 100% 80% at 50% 0%, #2a241c 0%, #0f0d0a 55%, #050403 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1.25rem 1rem 2rem;
}

.board-page {
  width: 100%;
  max-width: 28rem;
}

.board-header {
  text-align: center;
  margin-bottom: 1.25rem;
}

.board-header h1 {
  margin: 0 0 0.35rem;
  font-weight: 700;
  font-size: 1.65rem;
  letter-spacing: 0.02em;
}

.board-header p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.45;
}

.board-header a {
  color: #d4b87a;
}

.status-panel {
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  margin-bottom: 1rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
}

.status-msg {
  margin: 0;
  font-weight: 600;
  font-size: 1rem;
}

.status-msg[data-side="white"] {
  color: #fff;
  text-shadow: 0 0 12px rgba(255, 255, 255, 0.25);
}

.status-msg[data-side="black"] {
  color: #c9b896;
}

.status-msg.win {
  color: #7ee8a8;
}

.status-msg.draw {
  color: var(--muted);
}

.turn-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.turn-dot {
  width: 0.65rem;
  height: 0.65rem;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.35);
}

.turn-dot--white {
  background: var(--piece-white);
}

.turn-dot--black {
  background: var(--piece-black);
}

.board-wrap {
  position: relative;
  padding: 0.6rem;
  background: linear-gradient(145deg, #3a3026, #221c16);
  border-radius: calc(var(--radius) + 4px);
  box-shadow:
    0 4px 0 #120f0c,
    0 20px 50px rgba(0, 0, 0, 0.5);
}

.board {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  width: 100%;
  aspect-ratio: 1;
  border: 3px solid #0a0907;
  border-radius: 6px;
  overflow: hidden;
  user-select: none;
}

.square {
  position: relative;
  border: none;
  padding: 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.12s ease;
}

.square:focus-visible {
  outline: 2px solid #d4b87a;
  outline-offset: -2px;
  z-index: 1;
}

.square--light {
  background: var(--square-light);
}

.square--dark {
  background: var(--square-dark);
}

.square:not(:disabled):hover {
  background-image: linear-gradient(var(--square-hover), var(--square-hover));
}

.square:disabled {
  cursor: default;
}

.square--win {
  box-shadow: inset 0 0 0 3px var(--win);
}

.piece {
  width: 58%;
  aspect-ratio: 1;
  border-radius: 50%;
  box-shadow:
    inset 0 2px 4px rgba(255, 255, 255, 0.35),
    0 4px 8px rgba(0, 0, 0, 0.35);
}

.piece--white {
  background: radial-gradient(circle at 30% 30%, #fff, var(--piece-white));
  border: 2px solid #b8b0a0;
}

.piece--black {
  background: radial-gradient(circle at 30% 30%, #4a4540, var(--piece-black));
  border: 2px solid #000;
}

.board-actions {
  margin-top: 1.1rem;
  display: flex;
  justify-content: center;
  gap: 0.75rem;
}

.btn {
  font: inherit;
  font-weight: 600;
  padding: 0.55rem 1.15rem;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: linear-gradient(180deg, #4a4035, #2e2820);
  color: var(--text);
  cursor: pointer;
}

.btn:hover {
  filter: brightness(1.08);
}

.btn:active {
  transform: translateY(1px);
}

.rules {
  margin-top: 1.5rem;
  padding: 1rem;
  background: rgba(0, 0, 0, 0.25);
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.rules h2 {
  margin: 0 0 0.5rem;
  font-size: 0.95rem;
  color: var(--muted);
  font-weight: 600;
}

.rules ul {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.55;
}