:root {
  --bg1: #0b1020;
  --bg2: #152038;
  --text: #f0f4ff;
  --accent: #ffd54f;
  --lit: #ffe082;
  --lit-glow: #ffca28;
  --off: #1a2236;
  --off-border: #3a4a6a;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Outfit", sans-serif;
  background: linear-gradient(160deg, var(--bg1), 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: 480px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.level-badge {
  padding: 4px 10px;
  border-radius: 20px;
  background: rgba(255,213,79,0.2);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
}

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

.hud { font-weight: 700; color: var(--accent); }

.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; width: 100%; }

.game-container {
  display: flex;
  justify-content: center;
  padding: 8px 0;
}

.board {
  display: grid;
  gap: 8px;
  width: min(92vw, 420px);
  aspect-ratio: 1;
  padding: 10px;
  background: rgba(0,0,0,0.25);
  border-radius: 16px;
  border: 2px solid rgba(255,255,255,0.12);
}

.cell {
  border: 2px solid var(--off-border);
  border-radius: 12px;
  background: var(--off);
  cursor: pointer;
  min-width: 0;
  min-height: 44px;
  transition: background 0.15s, box-shadow 0.15s, transform 0.1s;
  font-family: inherit;
  padding: 0;
}

.cell.on {
  background: radial-gradient(circle at 35% 30%, #fff8e1, var(--lit) 45%, var(--lit-glow));
  border-color: #ffecb3;
  box-shadow: 0 0 16px rgba(255, 202, 40, 0.55), inset 0 0 10px rgba(255,255,255,0.35);
}

.cell:active { transform: scale(0.96); }

.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, #152038, #1e2d4a);
  border: 2px solid rgba(255,213,79,0.35);
  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;
  min-width: 44px;
  min-height: 44px;
  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; }
  .board { gap: 6px; padding: 8px; }
}