/* RTS Defense — clean top-down style */
:root {
  --bg-dark: #0f1419;
  --panel-bg: #1a2332;
  --panel-border: #2d3d52;
  --accent: #4a9eff;
  --accent-dim: #2d6bb8;
  --gold: #e8c547;
  --crystal: #7b68ee;
  --danger: #e85555;
  --success: #4ade80;
  --text: #e6edf3;
  --text-dim: #8b949e;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Segoe UI', system-ui, sans-serif;
  background: var(--bg-dark);
  color: var(--text);
  overflow: hidden;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

#game-container {
  position: relative;
  width: 100%;
  max-width: 1750px;
  height: 100vh;
  max-height: 1125px;
  display: flex;
  flex-direction: column;
  background: var(--bg-dark);
}

#game-canvas {
  flex: 1;
  width: 100%;
  height: 100%;
  display: block;
  cursor: default;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

#game-canvas.place-mode {
  cursor: crosshair;
}

#minimap-canvas {
  position: absolute;
  bottom: 60px;
  right: 12px;
  width: 160px;
  height: 120px;
  border: 2px solid var(--panel-border);
  background: #0a0e12;
  border-radius: 4px;
  image-rendering: pixelated;
  z-index: 10;
}

#hud {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  padding: 8px 12px;
  background: linear-gradient(to bottom, rgba(26, 35, 50, 0.95), transparent);
  display: flex;
  flex-direction: column;
  gap: 6px;
  pointer-events: none;
  z-index: 10;
}

#hud > * {
  pointer-events: auto;
}

#resource-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 14px;
  font-weight: 600;
}

#resource-gold { color: var(--gold); }
#resource-crystal { color: var(--crystal); }
#supply-info { color: #a3e635; }
.icon { font-size: 12px; opacity: 0.9; }

#wave-info {
  margin-left: auto;
  color: var(--accent);
}

.hud-event {
  color: #4ade80;
  font-size: 12px;
  margin-left: 8px;
}

.hud-objective {
  color: #fbbf24;
  font-size: 12px;
  margin-left: 8px;
}

.hero-hint {
  font-size: 11px;
  color: var(--text-dim);
  margin-top: -4px;
}

#send-wave-btn {
  margin-left: 8px;
  padding: 2px 12px;
  font-size: 12px;
  font-weight: 700;
  background: var(--danger);
  border: 1px solid #ff7777;
  border-radius: 4px;
  color: #fff;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

#send-wave-btn:hover {
  background: #ff4444;
  transform: scale(1.05);
}

#send-wave-btn:active {
  transform: scale(0.95);
}

#sound-btn {
  margin-left: 6px;
  padding: 2px 8px;
  font-size: 14px;
  background: rgba(255,255,255,0.08);
  border: 1px solid var(--panel-border);
  border-radius: 4px;
  cursor: pointer;
  color: var(--text);
  transition: background 0.15s;
  line-height: 1;
}

#sound-btn:hover {
  background: rgba(255,255,255,0.15);
}

#build-hotbar {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.build-btn {
  position: relative;
  padding: 6px 10px;
  font-size: 12px;
  font-weight: 600;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 4px;
  color: var(--text);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.build-btn .btn-tooltip {
  display: none;
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  margin-top: 6px;
  padding: 8px 10px;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 5px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.5);
  white-space: nowrap;
  z-index: 200;
  pointer-events: none;
  font-weight: 400;
  font-size: 11px;
  line-height: 1.6;
  text-align: left;
  color: var(--text-dim);
  min-width: 140px;
}

.build-btn .btn-tooltip .tt-name {
  font-weight: 700;
  font-size: 12px;
  color: var(--text);
  margin-bottom: 2px;
}

.build-btn .btn-tooltip .tt-cost {
  color: var(--gold);
}

.build-btn .btn-tooltip .tt-stat {
  color: var(--text-dim);
}

.build-btn:hover .btn-tooltip {
  display: block;
}

.build-btn:hover {
  background: var(--panel-border);
  border-color: var(--accent);
}

.build-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.build-btn.active {
  background: var(--accent-dim);
  border-color: var(--accent);
}

#side-panel {
  position: absolute;
  top: 80px;
  right: 12px;
  width: 200px;
  min-height: 120px;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  padding: 10px;
  font-size: 13px;
  z-index: 10;
}

.panel-section h3 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-dim);
  margin-bottom: 8px;
}

.panel-section.hidden {
  display: none !important;
}

#selection-info {
  min-height: 40px;
  color: var(--text-dim);
}

#tooltip {
  position: fixed;
  padding: 6px 10px;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 4px;
  font-size: 12px;
  max-width: 260px;
  pointer-events: none;
  z-index: 1000;
  opacity: 0;
  transition: opacity 0.1s;
  box-shadow: 0 4px 12px rgba(0,0,0,0.4);
}

#tooltip.visible {
  opacity: 1;
}

.modal {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--panel-bg);
  border: 2px solid var(--panel-border);
  border-radius: 12px;
  padding: 32px;
  text-align: center;
  max-width: 420px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
}

.modal h1, .modal h2 {
  margin-bottom: 12px;
  color: var(--accent);
}

.modal p {
  color: var(--text-dim);
  margin-bottom: 20px;
  line-height: 1.5;
}

.modal button {
  padding: 12px 24px;
  font-size: 16px;
  font-weight: 600;
  background: var(--accent);
  border: none;
  border-radius: 6px;
  color: #fff;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
}

.modal button:hover {
  background: var(--accent-dim);
  transform: scale(1.02);
}

.modal .difficulty-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.modal .game-mode-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.modal .game-mode-btn {
  padding: 8px 16px;
  font-size: 14px;
  background: var(--panel-border);
  color: var(--text-dim);
  border: 1px solid transparent;
  border-radius: 6px;
  cursor: pointer;
}

.modal .game-mode-btn:hover {
  color: var(--text);
  background: #3d4f66;
}

.modal .game-mode-btn.active {
  background: var(--accent);
  color: #fff;
}

.modal .difficulty-btn {
  padding: 8px 16px;
  font-size: 14px;
  background: var(--panel-border);
  color: var(--text-dim);
  border: 1px solid transparent;
  border-radius: 6px;
  cursor: pointer;
}

.modal .difficulty-btn:hover {
  color: var(--text);
  background: #3d4f66;
}

.modal .difficulty-btn.active {
  background: var(--accent);
  color: #fff;
}

.modal .run-stats {
  font-size: 13px;
  color: var(--text-dim);
  margin-bottom: 12px;
}

#game-over-overlay, #victory-overlay, #start-screen {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

#game-over-overlay.hidden,
#victory-overlay.hidden,
#start-screen.hidden {
  display: none !important;
}

.hidden {
  display: none !important;
}

.upgrade-item, .build-item {
  padding: 6px 8px;
  margin: 4px 0;
  width: 100%;
  background: rgba(255,255,255,0.08);
  border: 1px solid var(--panel-border);
  border-radius: 4px;
  cursor: pointer;
  display: block;
  text-align: left;
  color: var(--text);
  font-size: 12px;
  font-family: inherit;
}

.upgrade-item:hover, .build-item:hover {
  background: rgba(74, 158, 255, 0.25);
  border-color: var(--accent);
}

.upgrade-item:disabled, .build-item:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  border-color: var(--panel-border);
}

#sell-container {
  margin-top: 0.5em;
  padding-top: 0.5em;
  border-top: 1px solid rgba(255,255,255,0.1);
}

.sell-confirm-row {
  display: flex;
  gap: 6px;
}

.sell-confirm-row .upgrade-item {
  flex: 1;
}

.sell-btn {
  background: rgba(239, 68, 68, 0.15) !important;
  border-color: rgba(239, 68, 68, 0.4) !important;
  color: #fca5a5 !important;
}

.sell-btn:hover {
  background: rgba(239, 68, 68, 0.3) !important;
  border-color: #ef4444 !important;
}

/* Developer panel */
#dev-panel {
  position: absolute;
  top: 80px;
  left: 10px;
  width: 200px;
  background: rgba(20, 10, 30, 0.92);
  border: 1px solid #a855f7;
  border-radius: 6px;
  padding: 8px;
  z-index: 200;
  flex-direction: column;
  gap: 4px;
  box-shadow: 0 0 12px rgba(168, 85, 247, 0.3);
  font-size: 11px;
}

#dev-header {
  color: #d8b4fe;
  font-weight: bold;
  font-size: 12px;
  text-align: center;
  padding-bottom: 4px;
  border-bottom: 1px solid rgba(168, 85, 247, 0.3);
  margin-bottom: 2px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

#dev-fps {
  color: #a3e635;
  font-weight: normal;
  font-size: 10px;
}

#dev-buttons {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

#dev-buttons button {
  background: rgba(168, 85, 247, 0.15);
  border: 1px solid rgba(168, 85, 247, 0.35);
  color: #e9d5ff;
  padding: 4px 6px;
  border-radius: 3px;
  cursor: pointer;
  font-size: 11px;
  font-family: inherit;
  transition: background 0.15s;
}

#dev-buttons button:hover {
  background: rgba(168, 85, 247, 0.35);
  border-color: #a855f7;
}

#dev-buttons button.active {
  background: rgba(168, 85, 247, 0.5);
  border-color: #c084fc;
  color: #fff;
}

#dev-speed-row {
  display: flex;
  gap: 2px;
  align-items: center;
  padding-top: 2px;
}

#dev-speed-row span {
  color: #a78bfa;
  font-size: 10px;
  min-width: 36px;
}

#dev-speed-row button {
  flex: 1;
  padding: 2px 0;
  font-size: 10px;
}

#dev-stats {
  color: #a78bfa;
  font-size: 10px;
  padding-top: 4px;
  border-top: 1px solid rgba(168, 85, 247, 0.2);
  line-height: 1.5;
}

#alert-stack {
  position: absolute;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column-reverse;
  align-items: center;
  gap: 6px;
  z-index: 250;
  pointer-events: none;
}

.wave-alert {
  background: rgba(15, 10, 25, 0.92);
  border: 2px solid #f59e0b;
  border-radius: 8px;
  padding: 12px 28px;
  color: #fbbf24;
  font-size: 16px;
  font-weight: bold;
  text-align: center;
  letter-spacing: 0.5px;
  pointer-events: none;
  white-space: nowrap;
  opacity: 0;
  transform: translateY(12px) scale(0.9);
  transition: opacity 0.35s ease, transform 0.35s ease;
  box-shadow: 0 0 24px rgba(245, 158, 11, 0.3), inset 0 0 16px rgba(245, 158, 11, 0.05);
  text-shadow: 0 0 10px rgba(245, 158, 11, 0.5);
}

.wave-alert.visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.wave-alert.fading {
  opacity: 0;
  transform: translateY(-8px) scale(0.95);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

#dev-mode-indicator {
  position: absolute;
  top: 4px;
  left: 50%;
  transform: translateX(-50%);
  color: #d8b4fe;
  font-size: 10px;
  font-weight: bold;
  letter-spacing: 1px;
  text-shadow: 0 0 8px rgba(168, 85, 247, 0.6);
  pointer-events: none;
  z-index: 300;
}