* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  color: #e8e4d8;
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Consolas", "Courier New", sans-serif;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background:
    linear-gradient(rgba(0,0,0,0.4), rgba(0,0,0,0.75)),
    url("assets/bg/battlefield.svg") center / cover no-repeat fixed,
    #1a1510;
}

/* ---------- Iceberg scene ---------- */
#iceberg-scene {
  text-align: center;
  padding: 20px;
  width: 100%;
  max-width: 640px;
}
#iceberg-scene h1 {
  margin: 0;
  font-size: 40px;
  letter-spacing: 4px;
  color: #d9ecff;
  text-shadow: 0 2px 12px rgba(0,0,0,0.8);
}
#iceberg-scene .subtitle {
  margin: 4px 0 16px;
  opacity: 0.75;
  font-size: 14px;
}
#iceberg-scene .hint {
  margin-top: 12px;
  font-size: 13px;
  opacity: 0.6;
}

/* Iceberg meta-panel: shared wallet, casino entry, bonus shop */
#meta-panel {
  margin: 18px auto 0;
  max-width: 460px;
  padding: 12px 16px;
  background: linear-gradient(rgba(40,32,20,0.85), rgba(20,16,12,0.85));
  border: 1px solid #4a3d2a;
  border-radius: 6px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.06), 0 4px 18px rgba(0,0,0,0.5);
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-family: "Consolas", "Courier New", "PingFang SC", monospace;
}
#meta-panel .meta-wallet {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 18px;
  color: #ffe070;
  letter-spacing: 1px;
}
#meta-panel .meta-wallet .meta-label { color: #a8946a; font-size: 13px; }
#meta-panel .meta-wallet .hud-icon { font-size: 18px; }
#meta-panel .meta-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
#meta-panel .meta-btn {
  flex: 1 1 200px;
  padding: 9px 12px;
  background: linear-gradient(#3a3020, #1a1410);
  color: #ffd880;
  border: 1.5px solid #7a6238;
  border-radius: 3px;
  cursor: pointer;
  font: inherit;
  font-size: 13px;
  letter-spacing: 1px;
  text-align: center;
  text-decoration: none;
  transition: border-color 0.12s, background 0.12s, transform 0.12s;
}
#meta-panel .meta-btn:hover:not(:disabled) {
  background: linear-gradient(#4a3c28, #24201a);
  border-color: #ffc040;
  transform: translateY(-1px);
}
#meta-panel .meta-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
#meta-panel .casino-btn {
  background: linear-gradient(#4a2050, #2a1030);
  color: #ffb8e8;
  border-color: #a060a0;
}
#meta-panel .casino-btn:hover {
  background: linear-gradient(#5a3060, #3a1840);
  border-color: #ff80ff;
}
#meta-panel .meta-info {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: #a8946a;
  letter-spacing: 1px;
}
#meta-panel .meta-info b { color: #e8dcb0; }

#end-overlay .end-reward {
  margin: -8px 0 18px;
  padding: 8px 12px;
  font-size: 14px;
  color: #ffe070;
  background: rgba(0,0,0,0.35);
  border: 1px solid rgba(255,200,70,0.3);
  border-radius: 3px;
  letter-spacing: 1px;
}
#end-overlay .end-reward .end-reward-sub {
  font-size: 12px;
  color: #a8946a;
  margin-left: 4px;
}
#iceberg {
  position: relative;
  width: 420px;
  height: 580px;
  margin: 0 auto;
}
#iceberg::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 50% 6%, rgba(255,255,255,0.85), rgba(255,255,255,0.1) 18%, transparent 24%),
    linear-gradient(to bottom,
      rgba(225,245,255,0.92) 0%,
      rgba(170,210,240,0.88) 12%,
      rgba(100,155,200,0.85) 30%,
      rgba(60,110,160,0.8) 55%,
      rgba(25,55,95,0.82) 80%,
      rgba(10,25,50,0.9) 100%);
  -webkit-mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 500 700' preserveAspectRatio='none'><polygon points='240,20 300,60 330,140 500,150 470,700 30,700 0,150 170,140 200,60' fill='white'/></svg>") center/100% 100% no-repeat;
          mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 500 700' preserveAspectRatio='none'><polygon points='240,20 300,60 330,140 500,150 470,700 30,700 0,150 170,140 200,60' fill='white'/></svg>") center/100% 100% no-repeat;
  pointer-events: none;
  filter: drop-shadow(0 0 18px rgba(120,180,230,0.25));
}
#iceberg .water-line {
  position: absolute;
  left: -40px;
  right: -40px;
  top: 11%;
  height: 3px;
  background: linear-gradient(90deg, transparent, #7ab9e8, transparent);
  opacity: 0.6;
}
#iceberg .layer {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  padding: 6px 14px;
  border-radius: 16px;
  background: rgba(0,0,0,0.4);
  backdrop-filter: blur(2px);
  border: 1.5px solid rgba(255,255,255,0.15);
  color: rgba(255,255,255,0.35);
  cursor: not-allowed;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 110px;
  user-select: none;
  transition: transform 0.15s ease, background 0.15s ease;
}
#iceberg .layer .layer-name { font-size: 15px; font-weight: 600; letter-spacing: 2px; }
#iceberg .layer .layer-tag { font-size: 10px; opacity: 0.7; margin-top: 2px; }
#iceberg .layer[data-unlocked="true"] {
  color: #fff;
  background: rgba(255,200,70,0.22);
  border-color: rgba(255,200,70,0.8);
  cursor: pointer;
  box-shadow: 0 0 20px rgba(255,200,70,0.35);
}
#iceberg .layer[data-unlocked="true"]:hover {
  transform: translateX(-50%) scale(1.06);
  background: rgba(255,200,70,0.35);
}

/* ---------- Level scene ---------- */
#level-scene {
  position: relative;
}
#stage {
  display: flex;
  gap: 14px;
  padding: 14px;
  background: rgba(20, 18, 14, 0.7);
  border: 1px solid #3a3228;
  border-radius: 6px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.6), inset 0 0 0 1px rgba(90,75,55,0.3);
}
#battle-pane {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* --- HUD --- */
#hud {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 8px 14px;
  background: linear-gradient(#2a251d, #1a1510);
  border: 1px solid #4a3d2a;
  border-radius: 4px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.08), 0 2px 6px rgba(0,0,0,0.5);
  font-family: "Consolas", "Courier New", "PingFang SC", monospace;
  min-height: 36px;
}
.hud-cell {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  font-weight: 600;
  color: #e8dcb0;
  letter-spacing: 1px;
}
.hud-cell .hud-icon {
  font-size: 17px;
  filter: drop-shadow(0 1px 1px rgba(0,0,0,0.5));
}
.hud-cell.hud-wave {
  flex: 1;
  gap: 10px;
}
.hud-wave-bar {
  flex: 1;
  height: 8px;
  background: #0d0a07;
  border: 1px solid #4a3d2a;
  border-radius: 2px;
  overflow: hidden;
  min-width: 80px;
}
#hud-wave-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #8a6a2a, #d4a040, #ffe070);
  transition: width 0.3s ease;
}
#hud-gold { color: #ffe070; }
#hud-base { color: #f08080; }

#hud-mute {
  margin-left: auto;
  width: 32px;
  height: 32px;
  padding: 0;
  background: linear-gradient(#2d2820, #1e1a13);
  border: 1.5px solid #4a3d2a;
  border-radius: 3px;
  color: inherit;
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.12s, background 0.12s;
}
#hud-mute:hover {
  border-color: #ffc040;
  background: linear-gradient(#3a3428, #24201a);
}

/* --- Canvas --- */
#canvas-wrap {
  position: relative;
  border: 1px solid #2a2418;
  box-shadow: 0 0 0 2px #4a3d2a, 0 4px 20px rgba(0,0,0,0.7);
}
canvas {
  display: block;
  background: #3d5526;
}

/* Toast over canvas */
#toast {
  position: absolute;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  padding: 6px 14px;
  background: rgba(40, 10, 10, 0.85);
  color: #ffd8a0;
  border: 1px solid #7a3a2a;
  border-radius: 3px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  pointer-events: none;
  white-space: nowrap;
  box-shadow: 0 2px 10px rgba(0,0,0,0.7);
  opacity: 0;
}
#toast.toast-anim {
  animation: toast-fade 1.5s ease-out forwards;
}
@keyframes toast-fade {
  0%   { opacity: 0; transform: translate(-50%, -6px); }
  15%  { opacity: 1; transform: translate(-50%, 0); }
  75%  { opacity: 1; }
  100% { opacity: 0; transform: translate(-50%, -6px); }
}

/* --- Menu --- */
#menu {
  width: 178px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.menu-title {
  font-size: 12px;
  letter-spacing: 3px;
  color: #a8946a;
  padding: 2px 4px 6px;
  border-bottom: 1px solid #3a3228;
  margin-bottom: 2px;
}
.unit-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 8px;
  background: linear-gradient(#2d2820, #1e1a13);
  border: 1.5px solid #4a3d2a;
  border-radius: 3px;
  color: #e8dcb0;
  cursor: pointer;
  font-family: inherit;
  text-align: left;
  transition: transform 0.12s, border-color 0.12s, background 0.12s, opacity 0.12s;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.05);
}
.unit-btn:hover:not(.locked) {
  background: linear-gradient(#3a3428, #24201a);
  border-color: #7a6238;
}
.unit-btn.selected {
  border-color: #ffc040;
  background: linear-gradient(#4a3a1e, #2a2010);
  box-shadow: 0 0 0 1px #ffc040, 0 2px 8px rgba(255,192,64,0.2);
  transform: translateY(-1px);
}
.unit-btn.locked {
  opacity: 0.4;
  cursor: not-allowed;
  filter: grayscale(0.5);
}
.unit-icon {
  width: 40px;
  height: 40px;
  background: rgba(0,0,0,0.4);
  border: 1px solid #3a3020;
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.unit-icon img {
  width: 38px;
  height: 38px;
  display: block;
}
.unit-meta {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 1px;
}
.unit-name {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 1px;
}
.unit-cost {
  font-size: 12px;
  color: #ffe070;
  font-family: "Consolas", "Courier New", monospace;
}

/* --- End overlay --- */
#end-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  background: rgba(0,0,0,0.65);
  backdrop-filter: blur(2px);
}
#end-overlay .end-card {
  padding: 28px 40px;
  background: linear-gradient(#2a251d, #1a1510);
  border: 2px solid #7a6238;
  border-radius: 4px;
  text-align: center;
  min-width: 280px;
  box-shadow: 0 0 0 1px rgba(255,192,64,0.2), 0 10px 30px rgba(0,0,0,0.8);
}
#end-overlay #end-text {
  font-size: 46px;
  font-weight: 800;
  letter-spacing: 6px;
  margin-bottom: 20px;
  text-shadow: 0 2px 10px rgba(0,0,0,0.6);
}
#end-overlay button {
  padding: 10px 24px;
  font-size: 15px;
  font-family: inherit;
  letter-spacing: 3px;
  background: linear-gradient(#3a3020, #1a1410);
  color: #ffd880;
  border: 1.5px solid #7a6238;
  border-radius: 3px;
  cursor: pointer;
}
#end-overlay button:hover {
  background: linear-gradient(#4a3c28, #24201a);
  border-color: #ffc040;
}