html, body {
  height: 100%;
  margin: 0;
  background: #0b1b2a;
  color: #e6f2ff;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Microsoft YaHei", sans-serif;
}
#tank {
  width: 100vw;
  height: 100vh;
  display: block;
  background: radial-gradient(ellipse at center, rgba(20,60,90,0.9) 0%, rgba(6,20,36,0.95) 60%, rgba(2,10,18,1) 100%);
}
#hud {
  position: fixed;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 20px;
  background: rgba(0,0,0,0.35);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 12px;
  padding: 8px 14px;
  backdrop-filter: blur(6px);
  z-index: 10;
}
#feed-control {
  position: fixed;
  left: 12px;
  bottom: 12px;
  z-index: 11;
}
#feed-select-btn {
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.08);
  color: #e6f2ff;
  cursor: pointer;
}
.panel {
  margin-top: 8px;
  width: 240px;
  max-height: 280px;
  overflow: auto;
  background: rgba(0,0,0,0.5);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 10px;
}
.panel-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 12px;
  cursor: pointer;
}
.panel-item:hover { background: rgba(255,255,255,0.08); }
.hidden { display: none; }

#nav {
  position: fixed;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 11;
}
.nav-btn {
  width: 84px;
  height: 84px;
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,0.18);
  background: rgba(255,255,255,0.06);
  color: #e6f2ff;
  font-size: 16px;
  cursor: pointer;
  transform: scale(1);
  transition: transform 0.12s ease, background 0.12s ease;
}
.nav-btn:hover { transform: scale(1.08); background: rgba(255,255,255,0.12); }

#overlay {
  position: fixed;
  inset: 0;
  background: rgba(2,10,18,0.88);
  backdrop-filter: blur(6px);
  z-index: 20;
}
#overlay-bar {
  position: sticky;
  top: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: rgba(0,0,0,0.45);
  border-bottom: 1px solid rgba(255,255,255,0.12);
}
#overlay-title { font-size: 18px; }
#overlay-close {
  padding: 8px 12px;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.08);
  color: #e6f2ff;
  cursor: pointer;
}
#overlay-content {
  padding: 16px;
  height: calc(100% - 58px);
  overflow: auto;
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
}
.card {
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.16);
  padding: 12px;
  transition: transform .12s ease, box-shadow .12s ease;
}
.card:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.35); }
.card-header { display: flex; justify-content: space-between; margin-bottom: 8px; }
.card-title { font-weight: 600; }
.card-meta { opacity: .8; }
.card-detail { display: none; margin-top: 8px; opacity: .95; }
.card:hover .card-detail { display: block; }
.badge { padding: 2px 8px; border-radius: 999px; font-size: 12px; }
.q-normal { background: #4a5d73; }
.q-rare { background: #3b7bd9; }
.q-epic { background: #7c3bd9; }
.q-legend { background: #d99a3b; }
.tabs { display: flex; gap: 8px; margin-bottom: 12px; }
.tab-btn { padding: 8px 12px; border-radius: 8px; border: 1px solid rgba(255,255,255,0.18); background: rgba(255,255,255,0.06); color: #e6f2ff; cursor: pointer; }
.tab-btn.active { background: rgba(255,255,255,0.16); }
.price { font-weight: 600; }
.row { display: flex; gap: 8px; align-items: center; }
.qty { width: 60px; }
.battle {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.team { border: 1px solid rgba(255,255,255,0.16); border-radius: 12px; padding: 12px; }
.log { border: 1px solid rgba(255,255,255,0.16); border-radius: 12px; padding: 12px; height: 280px; overflow: auto; }
.bar { height: 8px; background: rgba(255,255,255,0.12); border-radius: 6px; overflow: hidden; }
.hp { height: 100%; background: #3bd97c; }
.btn { padding: 8px 12px; border-radius: 8px; border: 1px solid rgba(255,255,255,0.2); background: rgba(255,255,255,0.08); color: #e6f2ff; cursor: pointer; }