/* CSS Design System for GRAVITAS */

:root {
  --bg-dark: #07070f;
  --panel-bg: rgba(14, 14, 28, 0.65);
  --panel-border: rgba(255, 255, 255, 0.08);
  --panel-highlight: rgba(255, 255, 255, 0.15);
  
  --text-primary: #f0f0f5;
  --text-secondary: #a0a0b0;
  --text-muted: #6b6b7a;
  
  /* Palette Colors */
  --accent-cyan: #00d2ff;
  --accent-purple: #b61aff;
  --accent-yellow: #ffcb47;
  --accent-orange: #ff7e47;
  --accent-red: #ff4b5c;
  --accent-green: #00e676;
  
  --font-logo: 'Space Grotesk', sans-serif;
  --font-body: 'Outfit', sans-serif;
  
  --glow-shadow: 0 0 15px rgba(0, 210, 255, 0.35);
  --glow-shadow-purple: 0 0 15px rgba(182, 26, 255, 0.35);
  --glow-shadow-red: 0 0 15px rgba(255, 75, 92, 0.35);
}

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

body {
  background-color: var(--bg-dark);
  color: var(--text-primary);
  font-family: var(--font-body);
  overflow: hidden;
  height: 100vh;
  width: 100vw;
}

/* Background Canvas */
#simCanvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  background: radial-gradient(circle at center, #0a0a1a 0%, #030307 100%);
}

/* Primary Layout Grid */
.app-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 2;
  display: grid;
  grid-template-columns: 360px 1fr 380px;
  pointer-events: none; /* Let clicks pass through to canvas if not on panels */
}

/* Sidebar Panels styling */
.panel {
  height: 100vh;
  background: var(--panel-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-right: 1px solid var(--panel-border);
  pointer-events: auto; /* Re-enable clicks inside panels */
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.1) transparent;
  box-shadow: 10px 0 30px rgba(0, 0, 0, 0.5);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.right-panel {
  border-right: none;
  border-left: 1px solid var(--panel-border);
  box-shadow: -10px 0 30px rgba(0, 0, 0, 0.5);
}

/* Scrollbars */
.panel::-webkit-scrollbar {
  width: 6px;
}
.panel::-webkit-scrollbar-track {
  background: transparent;
}
.panel::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.12);
  border-radius: 4px;
}
.panel::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.25);
}

/* Brand Header */
.brand {
  padding: 24px 20px;
  display: flex;
  align-items: center;
  gap: 15px;
  border-bottom: 1px solid var(--panel-border);
  background: rgba(0, 0, 0, 0.15);
}

.logo {
  font-size: 26px;
  color: var(--accent-cyan);
  text-shadow: var(--glow-shadow);
  display: flex;
  align-items: center;
  justify-content: center;
}

.title-meta h1 {
  font-family: var(--font-logo);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: 2px;
  background: linear-gradient(135deg, #ffffff 40%, var(--accent-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 3px;
  color: var(--text-muted);
  display: block;
  margin-top: 1px;
}

/* Control Sections */
.control-section {
  padding: 20px;
  border-bottom: 1px solid var(--panel-border);
}

.control-section:last-child {
  border-bottom: none;
}

.section-title {
  font-family: var(--font-logo);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 1px;
  color: var(--text-secondary);
  text-transform: uppercase;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.section-title i {
  color: var(--accent-cyan);
}

/* Form Controls */
.control-group {
  margin-bottom: 18px;
}

.control-group:last-child {
  margin-bottom: 0;
}

.control-label {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 8px;
  font-weight: 400;
}

.control-label span:last-child {
  font-weight: 600;
  color: var(--accent-cyan);
}

/* Custom Sliders */
.custom-slider {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.1);
  outline: none;
  cursor: pointer;
  transition: background 0.3s;
}

.custom-slider:hover {
  background: rgba(255, 255, 255, 0.15);
}

.custom-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: var(--glow-shadow);
  border: 2px solid #fff;
  cursor: pointer;
  transition: transform 0.1s, background-color 0.2s;
}

.custom-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.custom-slider::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: var(--glow-shadow);
  border: 2px solid #fff;
  cursor: pointer;
  transition: transform 0.1s;
}

.custom-slider::-moz-range-thumb:hover {
  transform: scale(1.2);
}

/* Buttons */
.btn-group {
  display: flex;
  gap: 10px;
  margin-bottom: 15px;
}

.btn-group.row {
  margin-bottom: 15px;
}

.btn-group:last-child {
  margin-bottom: 0;
}

.btn {
  flex: 1;
  padding: 10px 16px;
  border-radius: 8px;
  border: none;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-primary {
  background: var(--accent-cyan);
  color: #030307;
  box-shadow: var(--glow-shadow);
}

.btn-primary:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
  box-shadow: 0 0 20px rgba(0, 210, 255, 0.5);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.18);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--panel-border);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.2);
  color: var(--text-primary);
}

.btn-danger {
  background: rgba(255, 75, 92, 0.15);
  color: var(--accent-red);
  border: 1px solid rgba(255, 75, 92, 0.3);
}

.btn-danger:hover {
  background: var(--accent-red);
  color: #fff;
  box-shadow: var(--glow-shadow-red);
  transform: translateY(-1px);
}

.btn-full {
  width: 100%;
}

/* Presets Grid */
.presets-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.preset-btn {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  padding: 10px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  font-family: var(--font-body);
  color: var(--text-secondary);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.preset-btn i {
  font-size: 18px;
  transition: transform 0.3s;
}

.preset-btn span {
  font-size: 11px;
  font-weight: 500;
}

.preset-btn:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(255, 255, 255, 0.15);
  color: var(--text-primary);
}

.preset-btn:hover i {
  transform: scale(1.15);
}

.preset-btn.active {
  background: rgba(0, 210, 255, 0.08);
  border-color: var(--accent-cyan);
  color: var(--text-primary);
  box-shadow: inset 0 0 10px rgba(0, 210, 255, 0.1);
}

/* Spawner Selector */
.spawner-selector {
  display: flex;
  gap: 5px;
  background: rgba(0, 0, 0, 0.2);
  padding: 4px;
  border-radius: 8px;
  border: 1px solid var(--panel-border);
  margin-bottom: 15px;
}

.spawn-type {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 8px 4px;
  border-radius: 6px;
  cursor: pointer;
  color: var(--text-muted);
  transition: all 0.2s ease;
}

.spawn-type i {
  font-size: 16px;
  margin-bottom: 4px;
}

.spawn-type span {
  font-size: 9px;
  font-weight: 600;
  text-transform: uppercase;
}

.spawn-type:hover {
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.03);
}

.spawn-type.active {
  background: rgba(255, 255, 255, 0.08);
  color: var(--accent-cyan);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

/* Entity Color Codes */
.spawn-type[data-type="asteroid"].active { color: var(--text-primary); }
.spawn-type[data-type="planet"].active { color: var(--accent-cyan); }
.spawn-type[data-type="star"].active { color: var(--accent-yellow); }
.spawn-type[data-type="neutron"].active { color: var(--accent-orange); }
.spawn-type[data-type="blackhole"].active { color: var(--accent-purple); }

/* Spawner Parameters */
.spawner-parameters {
  background: rgba(0, 0, 0, 0.15);
  border-radius: 8px;
  padding: 14px;
  border: 1px solid var(--panel-border);
}

/* Toggle Group button */
.toggle-group {
  display: flex;
  background: rgba(0, 0, 0, 0.2);
  padding: 3px;
  border-radius: 6px;
  border: 1px solid var(--panel-border);
}

.toggle-btn {
  flex: 1;
  padding: 8px 10px;
  border-radius: 4px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.toggle-btn.active {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* Telemetry Grid */
.telemetry-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.telemetry-card {
  background: rgba(0, 0, 0, 0.15);
  border: 1px solid var(--panel-border);
  padding: 10px;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.telemetry-label {
  font-size: 9px;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.5px;
  margin-bottom: 2px;
}

.telemetry-value {
  font-family: var(--font-logo);
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
}

/* Dropdown */
.dropdown-wrapper {
  position: relative;
}

.custom-select {
  width: 100%;
  padding: 10px 12px;
  border-radius: 6px;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--panel-border);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 12px;
  appearance: none;
  cursor: pointer;
  outline: none;
  transition: border-color 0.2s;
}

.custom-select:hover {
  border-color: rgba(255,255,255,0.18);
}

.custom-select:focus {
  border-color: var(--accent-cyan);
}

.dropdown-wrapper::after {
  content: '\f078';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 10px;
  color: var(--text-muted);
  pointer-events: none;
}

/* Checkbox Container */
.checkbox-container {
  display: flex;
  align-items: center;
  position: relative;
  padding-left: 26px;
  cursor: pointer;
  font-size: 12px;
  color: var(--text-secondary);
  user-select: none;
}

.checkbox-container input {
  position: absolute;
  opacity: 0;
  cursor: pointer;
  height: 0;
  width: 0;
}

.checkmark {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  left: 0;
  height: 16px;
  width: 16px;
  border-radius: 4px;
  background-color: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--panel-border);
  transition: background-color 0.2s, border-color 0.2s;
}

.checkbox-container:hover input ~ .checkmark {
  background-color: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.2);
}

.checkbox-container input:checked ~ .checkmark {
  background-color: var(--accent-cyan);
  border-color: var(--accent-cyan);
}

.checkmark:after {
  content: "";
  position: absolute;
  display: none;
}

.checkbox-container input:checked ~ .checkmark:after {
  display: block;
}

.checkbox-container .checkmark:after {
  left: 5px;
  top: 2px;
  width: 4px;
  height: 8px;
  border: solid #030307;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

/* Energy Graph Section */
.flex-grow-container {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  min-height: 220px;
}

.chart-container {
  flex-grow: 1;
  background: rgba(0, 0, 0, 0.2);
  border-radius: 8px;
  border: 1px solid var(--panel-border);
  position: relative;
  min-height: 120px;
  margin-bottom: 10px;
}

.chart-container canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 7px;
}

.energy-legend {
  display: flex;
  justify-content: space-between;
  font-size: 10px;
  color: var(--text-secondary);
  padding: 0 4px;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 5px;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.dot.kinetic { background-color: var(--accent-cyan); }
.dot.potential { background-color: var(--accent-red); }
.dot.total { background-color: var(--accent-green); }

/* Collision Event Log Section */
.event-feed-section {
  height: 160px;
  min-height: 160px;
  display: flex;
  flex-direction: column;
  border-bottom: none;
}

.event-log-container {
  flex-grow: 1;
  background: rgba(0, 0, 0, 0.3);
  border-radius: 8px;
  border: 1px solid var(--panel-border);
  padding: 10px;
  font-family: 'Space Grotesk', monospace;
  font-size: 10px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 4px;
  scrollbar-width: none; /* Hide scrollbars for minimalism */
}

.event-log-container::-webkit-scrollbar {
  display: none;
}

.log-entry {
  line-height: 1.4;
  color: var(--text-secondary);
}

.log-entry.system { color: var(--accent-cyan); }
.log-entry.collision { color: var(--accent-red); }
.log-entry.merge { color: var(--accent-orange); }
.log-entry.blackhole { color: var(--accent-purple); }

.log-time {
  color: var(--text-muted);
  margin-right: 5px;
}

/* Sound Status badge (Floating Overlay) */
.floating-badge {
  position: absolute;
  top: 20px;
  left: 380px;
  z-index: 10;
  background: rgba(14, 14, 28, 0.65);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--panel-border);
  padding: 6px 12px;
  border-radius: 30px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
  pointer-events: none;
  box-shadow: 0 4px 15px rgba(0,0,0,0.3);
  transition: all 0.3s;
}

.floating-badge.active {
  border-color: rgba(0, 210, 255, 0.3);
  color: var(--accent-cyan);
  box-shadow: 0 4px 15px rgba(0, 210, 255, 0.15);
}

.floating-badge.active i {
  animation: pulse-audio 1.5s infinite alternate;
}

/* Instructions Overlay */
.instruction-overlay {
  position: absolute;
  bottom: 20px;
  left: 380px;
  z-index: 10;
  pointer-events: none;
}

.key-controls {
  display: flex;
  gap: 15px;
  background: rgba(14, 14, 28, 0.45);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  border: 1px solid rgba(255, 255, 255, 0.05);
  padding: 8px 16px;
  border-radius: 30px;
  font-size: 10px;
  color: var(--text-secondary);
  box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

.key-controls i {
  color: var(--accent-cyan);
  margin-right: 2px;
}

/* Helper Utilities */
.text-yellow { color: var(--accent-yellow) !important; }
.text-blue { color: var(--accent-cyan) !important; }
.text-purple { color: var(--accent-purple) !important; }
.text-orange { color: var(--accent-orange) !important; }
.text-red { color: var(--accent-red) !important; }

.mt-10 { margin-top: 10px; }

/* Pulse Glow Keyframes */
@keyframes pulse-glow {
  0% {
    transform: scale(1);
    text-shadow: 0 0 10px rgba(0, 210, 255, 0.2);
  }
  100% {
    transform: scale(1.05);
    text-shadow: 0 0 25px rgba(0, 210, 255, 0.7);
  }
}

.pulse-glow {
  animation: pulse-glow 2s infinite alternate ease-in-out;
}

@keyframes pulse-audio {
  0% { transform: scale(1); opacity: 0.8; }
  100% { transform: scale(1.15); opacity: 1; }
}

/* Responsiveness Settings */
@media (max-width: 1100px) {
  .app-container {
    grid-template-columns: 320px 1fr 0px; /* Hide right panel */
  }
  .right-panel {
    transform: translateX(380px);
    position: absolute;
    right: 0;
    z-index: 10;
  }
  .floating-badge {
    left: 340px;
  }
  .instruction-overlay {
    left: 340px;
  }
}

@media (max-width: 768px) {
  .app-container {
    grid-template-columns: 0px 1fr 0px; /* Hide all sidebars, user toggle required */
  }
  .left-panel {
    transform: translateX(-360px);
    position: absolute;
    left: 0;
    z-index: 10;
  }
  .floating-badge {
    left: 20px;
  }
  .instruction-overlay {
    left: 20px;
    bottom: 20px;
  }
}