/* Modern CSS Reset & styling variable definitions */
:root {
  --font-hud: 'Outfit', sans-serif;
  --font-retro: 'Press Start 2P', monospace;

  --color-bg-glass: rgba(15, 23, 42, 0.45);
  --color-border-glass: rgba(255, 255, 255, 0.08);
  --color-glow: rgba(99, 102, 241, 0.3);

  --color-text: #f8fafc;
  --color-text-muted: #94a3b8;

  --color-primary: #6366f1;
  --color-primary-hover: #4f46e5;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;
  --color-danger-hover: #dc2626;

  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-medium: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  background-color: #090d16;
  color: var(--color-text);
  font-family: var(--font-hud);
  font-weight: 400;
}

#canvas-container {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 1;
}

/* Glassmorphic panels */
.glass-panel {
  background: var(--color-bg-glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--color-border-glass);
  border-radius: 16px;
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.glass-panel:hover {
  border-color: rgba(255, 255, 255, 0.15);
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.5), 0 0 15px var(--color-glow);
}

/* Splash Overlay (Interactive Start Screen) */
.splash-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at center, #111827 0%, #030712 100%);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 999;
  transition: opacity 0.8s ease-in-out, visibility 0.8s ease-in-out;
}

.splash-overlay.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.splash-content {
  text-align: center;
  max-width: 600px;
  padding: 40px;
  border-radius: 24px;
  background: rgba(17, 24, 39, 0.8);
  border: 2px solid rgba(99, 102, 241, 0.2);
  box-shadow: 0 0 50px rgba(99, 102, 241, 0.15);
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.game-title {
  font-family: var(--font-retro);
  font-size: 3rem;
  line-height: 1.2;
  letter-spacing: 2px;
  margin-bottom: 10px;
  color: #fff;
  text-shadow: 0 0 10px rgba(99, 102, 241, 0.5), 0 0 20px rgba(99, 102, 241, 0.3);
}

.game-title .highlight {
  color: #fb7185;
  text-shadow: 0 0 10px rgba(251, 113, 133, 0.5);
}

.tagline {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  margin-bottom: 30px;
  letter-spacing: 1px;
}

.how-to-play {
  text-align: left;
  background: rgba(0, 0, 0, 0.3);
  padding: 20px;
  border-radius: 12px;
  margin-bottom: 35px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.how-to-play h3 {
  font-size: 0.9rem;
  font-family: var(--font-retro);
  color: #fb7185;
  margin-bottom: 12px;
}

.how-to-play ul {
  list-style: none;
}

.how-to-play li {
  margin-bottom: 10px;
  font-size: 0.95rem;
  color: #cbd5e1;
  display: flex;
  align-items: center;
}

.how-to-play li::before {
  content: "";
  margin-right: 10px;
}

.arcade-btn {
  font-family: var(--font-retro);
  font-size: 1.1rem;
  padding: 18px 36px;
  background: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%);
  color: #fff;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.4), inset 0 -4px 0 rgba(0, 0, 0, 0.3);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.arcade-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 0 30px rgba(99, 102, 241, 0.7), inset 0 -4px 0 rgba(0, 0, 0, 0.3);
}

.arcade-btn:active {
  transform: scale(0.98);
  box-shadow: 0 0 10px rgba(99, 102, 241, 0.4);
}

.arcade-btn.danger-btn {
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  box-shadow: 0 0 20px rgba(239, 68, 68, 0.4), inset 0 -4px 0 rgba(0, 0, 0, 0.3);
  width: 100%;
}

.arcade-btn.danger-btn:hover {
  box-shadow: 0 0 30px rgba(239, 68, 68, 0.7), inset 0 -4px 0 rgba(0, 0, 0, 0.3);
}

/* HUD System (Visible elements during play) */
#hud-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 10;
  pointer-events: none; /* Let clicks pass through to Three.js canvas */
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 20px;
}

#hud-container.hidden {
  display: none !important;
}

.hud-panel {
  pointer-events: auto; /* Re-enable pointer events for UI interaction */
  padding: 16px;
  position: absolute;
}

/* Top bar style */
.top-bar {
  top: 20px;
  left: 20px;
  right: 20px;
  height: 70px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-emoji {
  font-size: 2rem;
  animation: rotate-cone 4s linear infinite;
  display: inline-block;
}

@keyframes rotate-cone {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.logo h2 {
  font-family: var(--font-retro);
  font-size: 1.1rem;
  letter-spacing: 1px;
}

.sub-status {
  font-size: 0.75rem;
  color: var(--color-success);
  font-weight: 600;
  letter-spacing: 0.5px;
  display: inline-block;
  margin-top: 2px;
}

.metrics {
  display: flex;
  gap: 24px;
}

.metric-card {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.metric-card .label {
  font-size: 0.7rem;
  font-family: var(--font-retro);
  color: var(--color-text-muted);
  letter-spacing: 0.5px;
}

.metric-card .value {
  font-size: 1.3rem;
  font-weight: 800;
  color: #fff;
}

.warning-text {
  color: #fb7185 !important;
  text-shadow: 0 0 8px rgba(251, 113, 133, 0.4);
}

/* Sidebar styles */
.sidebar-left {
  left: 20px;
  top: 110px;
  bottom: 110px;
  width: 280px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  overflow-y: auto;
}

.sidebar-right {
  right: 20px;
  top: 110px;
  bottom: 110px;
  width: 280px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  overflow-y: auto;
}

/* Control Group structure inside panels */
.control-group {
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding-bottom: 16px;
}

.control-group:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.control-group h3 {
  font-family: var(--font-retro);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-bottom: 12px;
  letter-spacing: 0.5px;
}

.tool-desc {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}

/* Grid layout for buttons */
.btn-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

/* Custom UI buttons */
.control-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--color-text);
  border-radius: 8px;
  padding: 10px 6px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.control-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.25);
}

.control-btn.active {
  background: var(--color-primary);
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: 0 0 10px var(--color-glow);
}

.control-btn.text-btn {
  width: 100%;
  font-family: var(--font-retro);
  font-size: 0.7rem;
  padding: 12px;
}

.control-btn.pulse {
  animation: pulse-border 2s infinite;
}

@keyframes pulse-border {
  0%, 100% { border-color: rgba(255, 255, 255, 0.1); }
  50% { border-color: rgba(99, 102, 241, 0.5); }
}

/* Sound Effect Buttons */
.sfx-btn {
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.2);
  color: #a5b4fc;
  border-radius: 8px;
  padding: 10px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.sfx-btn:hover {
  background: rgba(99, 102, 241, 0.25);
  color: #fff;
}

/* Spawner options style */
.spawner-options {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.spawn-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--color-text);
  border-radius: 8px;
  padding: 10px 4px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.spawn-btn:hover {
  background: rgba(255, 255, 255, 0.12);
}

.spawn-btn.active {
  background: rgba(16, 185, 129, 0.2);
  border-color: var(--color-success);
  box-shadow: 0 0 10px rgba(16, 185, 129, 0.2);
}

/* Custom sliders */
.slider-container {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(0, 0, 0, 0.2);
  padding: 8px 12px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.03);
}

.slider-icon {
  font-size: 1.1rem;
}

input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  outline: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-primary);
  box-shadow: 0 0 10px var(--color-primary);
  transition: transform var(--transition-fast);
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.slider-value {
  font-size: 0.8rem;
  font-family: var(--font-retro);
  min-width: 45px;
  text-align: right;
  color: var(--color-text);
}

/* Day/night specific slider thumb */
#day-night::-webkit-slider-thumb {
  background: var(--color-warning);
  box-shadow: 0 0 10px var(--color-warning);
}

/* Rage specific slider thumb */
#weasel-rage::-webkit-slider-thumb {
  background: var(--color-danger);
  box-shadow: 0 0 10px var(--color-danger);
}

/* Toggles (Switches) */
.toggle-container {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 10px;
  cursor: pointer;
}

.toggle-container input {
  display: none;
}

.toggle-slider {
  width: 40px;
  height: 20px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  position: relative;
  transition: background-color var(--transition-fast);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.toggle-slider::before {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #fff;
  top: 2px;
  left: 2px;
  transition: transform var(--transition-fast);
}

.toggle-container input:checked + .toggle-slider {
  background: var(--color-primary);
}

.toggle-container input:checked + .toggle-slider::before {
  transform: translateX(20px);
}

.toggle-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

/* Audio Visualizer Box */
.visualizer-container {
  margin-top: 12px;
  width: 100%;
  height: 60px;
  background: rgba(0, 0, 0, 0.4);
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  overflow: hidden;
  position: relative;
}

#audio-viz {
  width: 100%;
  height: 100%;
  display: block;
}

/* Instructions footer overlay */
.instructions-footer {
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  padding: 10px 24px;
  font-size: 0.85rem;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.instructions-footer p {
  color: var(--color-text-muted);
}

.instructions-footer strong {
  color: #fff;
}

/* Helper Utilities */
.mt-10 { margin-top: 10px; }
.mt-15 { margin-top: 15px; }
.text-center { text-align: center; }

/* Scrollbar customization for panels */
::-webkit-scrollbar {
  width: 4px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.25);
}

/* Responsive adjustment for small screens */
@media (max-height: 750px), (max-width: 900px) {
  #hud-container {
    flex-direction: row;
    flex-wrap: wrap;
    align-content: flex-start;
    gap: 10px;
    padding: 10px;
    overflow-y: auto;
  }
  .hud-panel {
    position: static;
    transform: none !important;
    width: 100% !important;
  }
  .top-bar {
    height: auto;
    padding: 10px;
  }
  .sidebar-left, .sidebar-right, .instructions-footer {
    height: auto;
  }
  .instructions-footer {
    display: none; /* Hide instructions on small screens */
  }
}