:root {
  --bg: #0f2e1c;
  --bg2: #1a4d2e;
  --board: #1b7a4a;
  --sq: #159a57;
  --text: #f0f5f2;
  --accent: #e8c547;
  --legal: rgba(255, 255, 255, 0.35);
  --hint: #ffeb3b;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Outfit", sans-serif;
  background: linear-gradient(160deg, #061a10, var(--bg) 45%, var(--bg2));
  min-height: 100vh;
  color: var(--text);
  -webkit-tap-highlight-color: transparent;
}

.wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 12px;
}

.hidden { display: none !important; }

.level-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 80vh;
  text-align: center;
}

.level-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.level-header h1, .header h1 {
  margin: 0;
  font-size: clamp(1.4rem, 4vw, 2rem);
}

.level-screen > p { margin: 0 0 24px; opacity: 0.9; }

.level-buttons {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: 100%;
  max-width: 320px;
}

.level-btn {
  padding: 16px 20px;
  border: 2px solid rgba(255,255,255,0.3);
  border-radius: 12px;
  background: rgba(255,255,255,0.08);
  color: inherit;
  font-family: inherit;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.level-btn:hover { background: rgba(255,255,255,0.15); }
.level-name { font-weight: 700; font-size: 1.1rem; }
.level-desc { font-size: 0.85rem; opacity: 0.85; }

.help-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.4);
  background: rgba(255,255,255,0.1);
  color: inherit;
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
}

.game-screen {
  width: 100%;
  max-width: 520px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}

.level-badge {
  padding: 4px 10px;
  border-radius: 20px;
  background: rgba(255,255,255,0.2);
  font-size: 0.8rem;
  font-weight: 600;
}

.header-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-left: auto;
  align-items: center;
}

.score, .turn { font-weight: 600; font-size: 0.9rem; }
.turn.ai { opacity: 0.75; }

.btn {
  padding: 10px 14px;
  min-height: 44px;
  border: none;
  border-radius: 8px;
  background: rgba(255,255,255,0.25);
  color: inherit;
  font-family: inherit;
  font-weight: 600;
  cursor: pointer;
}

.btn-ghost {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.4);
}

.btn-large { padding: 12px 22px; }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }

.game-container {
  display: flex;
  justify-content: center;
}

.board {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  width: min(92vw, 440px);
  aspect-ratio: 1;
  background: var(--board);
  border: 6px solid #0d3d26;
  border-radius: 8px;
  gap: 2px;
  padding: 4px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}

.square {
  background: var(--sq);
  border-radius: 3px;
  position: relative;
  cursor: default;
  display: flex;
  align-items: center;
  justify-content: center;
}

.square.legal { cursor: pointer; }
.square.legal::after {
  content: "";
  width: 22%;
  height: 22%;
  border-radius: 50%;
  background: var(--legal);
}
.square.hint::after {
  background: var(--hint);
  width: 28%;
  height: 28%;
}

.disc {
  width: 78%;
  height: 78%;
  border-radius: 50%;
  box-shadow: 0 2px 4px rgba(0,0,0,0.35), inset 0 2px 4px rgba(255,255,255,0.2);
}

.disc.black {
  background: radial-gradient(circle at 35% 30%, #555, #111 60%, #000);
}
.disc.white {
  background: radial-gradient(circle at 35% 30%, #fff, #e8e8e8 55%, #ccc);
}

.result-overlay, .help-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.75);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 20px;
}

.help-overlay { z-index: 300; }

.result-box, .help-modal {
  background: linear-gradient(145deg, #0d3d26, #1b7a4a);
  border: 2px solid rgba(255,255,255,0.2);
  border-radius: 16px;
  padding: 28px;
  max-width: 400px;
  width: 100%;
  text-align: center;
}

.help-modal { text-align: left; }
.help-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}
.help-header h2 { margin: 0; }
.help-close {
  width: 36px;
  height: 36px;
  border: none;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  color: inherit;
  font-size: 1.5rem;
  cursor: pointer;
}
.help-body ul { padding-left: 20px; }
.help-body li { margin-bottom: 8px; line-height: 1.4; }
.result-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 16px;
}
.result-box h2 { color: var(--accent); margin: 0 0 8px; }

@media (max-width: 480px) {
  .header-actions { width: 100%; margin-left: 0; }
}