:root {
  --bg: #14101f;
  --panel: #1f1a33;
  --panel-2: #2a2347;
  --accent: #e8c25a;
  --accent-2: #7fd1ff;
  --hp: #e05a5a;
  --gold: #e8c25a;
  --text: #f2eee8;
  --text-dim: #b8b0d0;
  --border: #3c3260;
  --enemy: #c0392b;
  --player: #2e8b57;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Segoe UI', 'Hiragino Sans', 'Yu Gothic', sans-serif;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

#app {
  max-width: 720px;
  margin: 0 auto;
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 100vh;
}

#topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 14px;
  padding: 8px 12px;
  background: var(--panel);
  border-radius: 10px;
  border: 1px solid var(--border);
}

#topbar h1 {
  font-size: 1.1rem;
  letter-spacing: 0.06em;
  margin: 0;
  color: var(--accent);
  flex: 1 1 auto;
}

#btn-lang {
  padding: 4px 10px;
  font-size: 0.72rem;
  border-color: var(--accent-2);
}

#btn-help, #btn-mute {
  padding: 4px 9px;
  font-size: 0.85rem;
  border-color: var(--border);
}

#topbar .stat {
  font-size: 0.85rem;
  color: var(--text-dim);
  white-space: nowrap;
}

#topbar .stat b { color: var(--text); }

#stat-streak-wrap b#stat-streak.streak-win { color: #5ad15a; }
#stat-streak-wrap b#stat-streak.streak-lose { color: #e05a5a; }

#hp-bar-wrap {
  flex: 1 0 140px;
  height: 10px;
  background: #3a2020;
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--border);
}

#hp-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, #e05a5a, #ff9a5a);
  width: 100%;
  transition: width 0.3s ease;
}

main {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

#board-wrap {
  position: relative;
  background: var(--panel);
  border-radius: 10px;
  border: 1px solid var(--border);
  padding: 6px;
}

#board-canvas {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 6px;
  background: #0d0a18;
  touch-action: none;
}

#battle-controls {
  position: absolute;
  top: 14px;
  right: 14px;
}

#board-capacity {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(10, 8, 20, 0.75);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 0.78rem;
  color: var(--text-dim);
  z-index: 5;
  pointer-events: none;
}

#battle-controls button {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--accent-2);
}

#result-banner {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background: rgba(10, 8, 20, 0.92);
  border: 2px solid var(--accent);
  border-radius: 12px;
  padding: 16px 24px;
  text-align: center;
  font-size: 1.2rem;
  min-width: 60%;
}

#result-banner .sub { font-size: 0.9rem; color: var(--text-dim); margin-top: 6px; }

.hidden { display: none !important; }

#synergy-panel {
  background: var(--panel);
  border-radius: 10px;
  border: 1px solid var(--border);
  padding: 8px 12px;
}

#synergy-panel h2, #bench-panel h2 {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin: 0 0 6px 0;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

#synergy-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

#synergy-list li {
  background: var(--panel-2);
  border: 1px solid var(--accent-2);
  border-radius: 999px;
  padding: 3px 10px;
  font-size: 0.78rem;
}

#synergy-list li.empty {
  border-color: var(--border);
  color: var(--text-dim);
}

#synergy-list li.tag {
  cursor: pointer;
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text-dim);
  transition: border-color 0.1s ease, color 0.1s ease;
}

#synergy-list li.tag:active { transform: scale(0.96); }

#synergy-list li.tag.active {
  border-color: var(--accent-2);
  color: var(--text);
}

#synergy-list li.tag .progress {
  margin-left: 4px;
  font-size: 0.72rem;
  color: var(--text-dim);
}

#synergy-detail-overlay {
  position: fixed;
  inset: 0;
  background: rgba(5, 4, 10, 0.88);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 60;
  padding: 16px;
}

#synergy-detail-box {
  background: var(--panel);
  border: 2px solid var(--accent-2);
  border-radius: 14px;
  padding: 20px;
  max-width: 380px;
  width: 100%;
  max-height: 80vh;
  overflow-y: auto;
}

#synergy-detail-box h2 { color: var(--accent-2); margin-top: 0; margin-bottom: 4px; }
#synergy-detail-progress { color: var(--text-dim); font-size: 0.85rem; margin-top: 0; }

#synergy-detail-steps {
  list-style: none;
  margin: 12px 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

#synergy-detail-steps li {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 0.82rem;
}

#synergy-detail-steps li .tier-label {
  font-weight: bold;
  color: var(--text-dim);
  margin-right: 6px;
}

#synergy-detail-steps li.reached {
  border-color: var(--accent-2);
}

#synergy-detail-steps li.reached .tier-label { color: var(--accent-2); }

#btn-synergy-detail-close { width: 100%; margin-top: 4px; }

#tutorial-overlay {
  position: fixed;
  inset: 0;
  background: rgba(5, 4, 10, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 70;
  padding: 16px;
}

#tutorial-box {
  background: var(--panel);
  border: 2px solid var(--accent);
  border-radius: 14px;
  padding: 22px;
  max-width: 380px;
  width: 100%;
}

#tutorial-box h2 { color: var(--accent); margin-top: 0; margin-bottom: 10px; font-size: 1.05rem; }
#tutorial-box p { color: var(--text); font-size: 0.9rem; line-height: 1.55; margin: 0 0 14px 0; }

#tutorial-dots {
  display: flex;
  justify-content: center;
  gap: 6px;
  margin-bottom: 14px;
}

.tutorial-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--border);
}

.tutorial-dot.active { background: var(--accent); }

#tutorial-actions {
  display: flex;
  gap: 8px;
}

#btn-tutorial-skip { flex: 0 0 auto; background: transparent; border-color: var(--border); color: var(--text-dim); }
#btn-tutorial-prev { flex: 0 0 auto; }
#btn-tutorial-next {
  flex: 1 1 auto;
  background: linear-gradient(90deg, #7a4fd1, #4f8fd1);
  border: none;
  font-weight: bold;
  color: #fff;
}

#selected-panel {
  background: var(--panel-2);
  border: 1px solid var(--accent);
  border-radius: 10px;
  padding: 10px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

#shop-panel, #bench-panel {
  background: var(--panel);
  border-radius: 10px;
  border: 1px solid var(--border);
  padding: 10px;
}

#shop-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 8px;
  margin-bottom: 10px;
}

.shop-card {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px;
  text-align: center;
  cursor: pointer;
  transition: transform 0.1s ease, border-color 0.1s ease;
}

.shop-card:active { transform: scale(0.97); }

.shop-card.affordable { border-color: var(--accent); }
.shop-card.disabled { opacity: 0.4; cursor: not-allowed; }
.shop-card.empty { visibility: hidden; }

.shop-card .swatch {
  width: 64px;
  height: 88px;
  border-radius: 6px;
  margin: 0 auto 6px auto;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  font-weight: bold;
  font-size: 0.65rem;
  color: #10101a;
  background-size: cover;
  background-position: center top;
  border: 1px solid rgba(255,255,255,0.12);
}

.shop-card .name { font-size: 0.78rem; margin-bottom: 2px; }
.shop-card .tags { font-size: 0.68rem; color: var(--text-dim); margin-bottom: 4px; }
.shop-card .skill-name { font-size: 0.66rem; color: var(--accent-2); margin-bottom: 4px; }
.shop-card .cost { font-size: 0.8rem; color: var(--gold); font-weight: bold; }

#shop-actions {
  display: flex;
  gap: 8px;
}

button {
  font-family: inherit;
  font-size: 0.85rem;
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  cursor: pointer;
}

button:disabled { opacity: 0.4; cursor: not-allowed; }

#btn-start-battle {
  flex: 1;
  background: linear-gradient(90deg, #7a4fd1, #4f8fd1);
  border: none;
  font-weight: bold;
  color: #fff;
}

#bench-slots {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 6px;
}

.bench-slot {
  aspect-ratio: 1 / 1;
  background-color: var(--panel-2);
  background-size: cover;
  background-position: center top;
  border: 1px solid var(--border);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  text-align: center;
  cursor: pointer;
  position: relative;
}

.bench-slot.selected { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent) inset; }
.bench-slot.empty { cursor: default; }

.bench-slot .stars {
  position: absolute;
  bottom: 1px;
  left: 0;
  right: 0;
  font-size: 0.6rem;
  color: #fff59d;
  text-shadow: 0 0 3px #000, 0 0 3px #000;
  pointer-events: none;
}

.bench-slot .code-badge {
  position: absolute;
  top: 2px;
  left: 2px;
  font-size: 0.5rem;
  font-weight: bold;
  padding: 0 3px;
  border-radius: 3px;
  background: rgba(10, 8, 20, 0.65);
  color: var(--text);
  pointer-events: none;
}

#selected-panel {
  gap: 12px;
}

#selected-thumb {
  flex: 0 0 auto;
  width: 48px;
  height: 66px;
  border-radius: 6px;
  border: 1px solid var(--accent);
  background-color: var(--panel);
  background-size: cover;
  background-position: center top;
}

#selected-info { flex: 1 1 auto; }

#gameover-overlay {
  position: fixed;
  inset: 0;
  background: rgba(5, 4, 10, 0.88);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
  padding: 16px;
}

#gameover-box {
  background: var(--panel);
  border: 2px solid var(--accent);
  border-radius: 14px;
  padding: 24px;
  text-align: center;
  max-width: 340px;
}

#gameover-box h2 { color: var(--accent); margin-top: 0; }

#gameover-actions {
  display: flex;
  gap: 8px;
  margin-top: 16px;
}

#btn-share-x {
  flex: 1 1 auto;
  background: #000;
  border: 1px solid #333;
  color: #fff;
  font-weight: bold;
}

#btn-restart { flex: 1 1 auto; }

#toast {
  position: fixed;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%);
  background: rgba(20, 16, 31, 0.96);
  border: 1px solid var(--accent);
  color: var(--text);
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 0.8rem;
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

#toast.show { opacity: 1; }

@media (min-width: 640px) {
  #app { padding: 16px; gap: 12px; }
}