* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  user-select: none;
}

body, html {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: #04060d;
  font-family: 'Rajdhani', sans-serif;
  color: #e2f1ff;
}

#game-container {
  position: relative;
  width: 100vw;
  height: 100vh;
  background: #020308;
}

#gameCanvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: crosshair;
}

/* Sci-Fi HUD Layer */
#hud {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 20px;
  z-index: 10;
}

.hud-panel {
  background: rgba(6, 12, 26, 0.8);
  border: 1px solid rgba(0, 240, 255, 0.3);
  backdrop-filter: blur(10px);
  padding: 12px 18px;
  border-radius: 8px;
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.15);
  pointer-events: auto;
}

.top-left {
  align-self: flex-start;
  min-width: 220px;
}

.brand {
  font-family: 'Orbitron', sans-serif;
  font-size: 11px;
  letter-spacing: 2px;
  color: #00f0ff;
  font-weight: 800;
  margin-bottom: 2px;
}

.wave-title {
  font-family: 'Orbitron', sans-serif;
  font-size: 18px;
  font-weight: 900;
  color: #ffffff;
}

.hud-sub {
  font-size: 12px;
  color: #8aa3c2;
  margin-bottom: 4px;
}

.score-display {
  font-family: 'Orbitron', sans-serif;
  font-size: 16px;
  font-weight: 800;
}

.gold { color: #ffcc00; }

.top-right {
  position: absolute;
  top: 20px;
  right: 20px;
  min-width: 240px;
}

.weapon-hud {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.weapon-header {
  font-size: 10px;
  letter-spacing: 1px;
  color: #8aa3c2;
}

.weapon-name {
  font-family: 'Orbitron', sans-serif;
  font-size: 16px;
  font-weight: 800;
  color: #00f0ff;
}

.ammo-display {
  font-family: 'Orbitron', sans-serif;
  font-size: 13px;
  color: #ffcc00;
  margin-bottom: 6px;
}

.weapon-slots {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
}

.w-slot {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 3px 6px;
  border-radius: 4px;
  font-size: 10px;
  font-family: 'Orbitron', sans-serif;
  color: #8aa3c2;
  text-align: center;
}

.w-slot.active {
  background: rgba(0, 240, 255, 0.2);
  border-color: #00f0ff;
  color: #00f0ff;
  font-weight: 800;
  box-shadow: 0 0 8px rgba(0, 240, 255, 0.4);
}

.bottom-left {
  align-self: flex-start;
  min-width: 260px;
}

.gauge-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.gauge-container {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.gauge-label {
  font-size: 10px;
  letter-spacing: 1px;
  color: #8aa3c2;
}

.gauge-bar-bg {
  width: 100%;
  height: 10px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 5px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.gauge-bar-fill {
  height: 100%;
  width: 100%;
  transition: width 0.15s ease;
}

.gauge-bar-fill.health {
  background: linear-gradient(90deg, #ff0050, #ff3300);
  box-shadow: 0 0 10px #ff0050;
}

.gauge-bar-fill.shield {
  background: linear-gradient(90deg, #0099ff, #00f0ff);
  box-shadow: 0 0 10px #00f0ff;
}

.dash-badge {
  font-family: 'Orbitron', sans-serif;
  font-size: 10px;
  font-weight: 700;
  color: #00ff66;
  margin-top: 4px;
}

.bottom-right {
  position: absolute;
  bottom: 20px;
  right: 20px;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
}

.hud-btn {
  background: rgba(0, 240, 255, 0.15);
  border: 1px solid #00f0ff;
  color: #00f0ff;
  padding: 6px 12px;
  border-radius: 4px;
  font-family: 'Orbitron', sans-serif;
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
}

.hud-btn:hover {
  background: #00f0ff;
  color: #04060d;
}

.controls-mini-guide {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  font-size: 11px;
  color: #8aa3c2;
}

/* Hit Flash Overlay */
#hit-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  background: radial-gradient(circle, transparent 40%, rgba(255, 0, 80, 0.4) 100%);
  opacity: 0;
  transition: opacity 0.1s;
  z-index: 5;
}

#hit-overlay.active {
  opacity: 1;
}

/* Modal Backdrops & Cards */
.modal-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(3, 5, 12, 0.88);
  backdrop-filter: blur(15px);
  z-index: 100;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
  opacity: 1;
  transition: opacity 0.3s ease;
}

.modal-backdrop.hidden {
  opacity: 0;
  pointer-events: none;
}

.modal-card {
  background: rgba(8, 16, 32, 0.95);
  border: 2px solid #00f0ff;
  border-radius: 12px;
  width: 100%;
  max-width: 800px;
  box-shadow: 0 0 40px rgba(0, 240, 255, 0.3);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  max-height: 90vh;
}

.modal-header {
  background: linear-gradient(90deg, rgba(0, 240, 255, 0.2), transparent);
  padding: 18px 26px;
  border-bottom: 1px solid rgba(0, 240, 255, 0.3);
}

.modal-header h2 {
  font-family: 'Orbitron', sans-serif;
  font-size: 22px;
  font-weight: 900;
  color: #00f0ff;
  text-shadow: 0 0 10px rgba(0, 240, 255, 0.6);
}

.modal-header .tagline {
  font-size: 12px;
  color: #8aa3c2;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.modal-body {
  padding: 20px 26px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.story-text {
  font-size: 14px;
  line-height: 1.5;
  color: #d0e4f7;
}

.controls-guide h3, .weapons-guide h3 {
  font-family: 'Orbitron', sans-serif;
  font-size: 12px;
  color: #00f0ff;
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.controls-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
  background: rgba(0, 0, 0, 0.4);
  padding: 14px;
  border-radius: 8px;
}

.control-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.control-item .key {
  display: inline-block;
  background: rgba(0, 240, 255, 0.2);
  border: 1px solid #00f0ff;
  color: #ffffff;
  font-family: 'Orbitron', sans-serif;
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 4px;
  width: max-content;
}

.control-item .desc {
  font-size: 11px;
  color: #8aa3c2;
}

.weapon-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 10px;
}

.w-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(0, 240, 255, 0.2);
  border-radius: 6px;
  padding: 10px;
}

.w-title {
  font-family: 'Orbitron', sans-serif;
  font-size: 11px;
  font-weight: 700;
  color: #ffcc00;
  margin-bottom: 4px;
}

.w-desc {
  font-size: 11px;
  color: #8aa3c2;
}

.modal-footer {
  padding: 14px 26px;
  background: rgba(0, 0, 0, 0.3);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: flex-end;
}

.action-btn {
  background: #00f0ff;
  border: none;
  color: #04060d;
  font-family: 'Orbitron', sans-serif;
  font-size: 14px;
  font-weight: 900;
  padding: 12px 28px;
  border-radius: 6px;
  cursor: pointer;
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.4);
  transition: all 0.2s;
}

.action-btn:hover {
  background: #ffffff;
  box-shadow: 0 0 25px rgba(255, 255, 255, 0.6);
  transform: translateY(-2px);
}

/* Results modal specifics */
.results-stats {
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: rgba(0, 0, 0, 0.4);
  padding: 20px;
  border-radius: 8px;
}

.result-row {
  display: flex;
  justify-content: space-between;
  font-size: 16px;
}

.result-row.total {
  font-size: 22px;
  font-weight: 900;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: 10px;
  margin-bottom: 4px;
}