/* ===== RESET & BASE STYLES ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #667eea;
  --secondary-color: #764ba2;
  --accent-color: #f093fb;
  --success-color: #4ecdc4;
  --warning-color: #ffe66d;
  --danger-color: #ff6b6b;
  --dark-bg: #0f0f23;
  --darker-bg: #0a0a1a;
  --card-bg: rgba(255, 255, 255, 0.05);
  --text-primary: #ffffff;
  --text-secondary: #b8c6db;
  --text-muted: #718096;
  --border-color: rgba(255, 255, 255, 0.1);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.15);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
  --blur-sm: blur(8px);
  --blur-md: blur(16px);
  --blur-lg: blur(24px);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    sans-serif;
  background: linear-gradient(135deg, var(--dark-bg) 0%, var(--darker-bg) 100%);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ===== HERO SECTION ===== */
.hero-section {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: radial-gradient(
      ellipse at top,
      rgba(102, 126, 234, 0.15) 0%,
      transparent 50%
    ),
    radial-gradient(
      ellipse at bottom,
      rgba(118, 75, 162, 0.15) 0%,
      transparent 50%
    ),
    linear-gradient(135deg, var(--dark-bg) 0%, var(--darker-bg) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  transition: transform 0.8s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.8s ease;
}

.hero-section.hidden {
  transform: translateY(-100%);
  opacity: 0;
  pointer-events: none;
}

.hero-content {
  text-align: center;
  max-width: 800px;
  padding: 2rem;
  animation: heroFadeIn 1s ease-out;
}

.hero-title {
  font-size: clamp(3rem, 6vw, 5rem);
  font-weight: 700;
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--accent-color)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1.5rem;
  line-height: 1.2;
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2.5vw, 1.5rem);
  color: var(--text-secondary);
  margin-bottom: 3rem;
  font-weight: 300;
}

.hero-actions {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 4rem;
}

.hero-btn {
  padding: 1rem 2rem;
  border: none;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.hero-btn.primary {
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  color: white;
  box-shadow: var(--shadow-md);
}

.hero-btn.primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.hero-btn.secondary {
  background: var(--card-bg);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  backdrop-filter: var(--blur-sm);
}

.hero-btn.secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

.scroll-indicator {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  opacity: 0.7;
  animation: scrollPulse 2s infinite;
}

.scroll-text {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 400;
}

.scroll-arrow {
  font-size: 1.5rem;
  color: var(--primary-color);
}

/* ===== CANVAS CONTAINER ===== */
#canvas-container {
  position: relative;
  width: 100vw;
  height: 100vh;
  margin-top: 100vh; /* Push canvas below hero */
  background: linear-gradient(135deg, var(--dark-bg) 0%, var(--darker-bg) 100%);
  z-index: 1;
}

#solar-system {
  position: relative;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 500; /* Increase z-index to be below UI panels but visible */
  display: block;
  background: radial-gradient(ellipse at center, #1b2735 0%, #090a0f 100%);
}

/* ===== LOADING INDICATOR ===== */
.loading-indicator {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: white;
  text-align: center;
  z-index: 10;
  font-family: "Inter", sans-serif;
}

.loading-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 0.6;
  }
  50% {
    opacity: 1;
  }
}

/* ===== FLOATING ACTION BUTTONS ===== */
.floating-action-btn {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 60px;
  height: 60px;
  border: none;
  border-radius: 50%;
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  transition: var(--transition);
  z-index: 1000;
  opacity: 0;
  transform: scale(0);
}

.floating-action-btn.visible {
  opacity: 1;
  transform: scale(1);
}

.floating-action-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 12px 40px rgba(102, 126, 234, 0.4);
}

.floating-action-btn:active {
  transform: scale(0.95);
}

/* ===== BACK TO TOP BUTTON ===== */
.back-to-top-btn {
  position: fixed;
  bottom: 8rem; /* Position above the main FAB with proper spacing */
  right: 2rem;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: linear-gradient(
    135deg,
    var(--secondary-color),
    var(--primary-color)
  );
  border: none;
  color: white;
  font-size: 1.2rem;
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  z-index: 2500;
  opacity: 0;
  transform: scale(0.8);
  transition: all var(--transition-smooth);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.back-to-top-btn.visible {
  opacity: 1;
  transform: scale(1);
}

.back-to-top-btn:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-xl);
}

.back-to-top-btn:active {
  transform: scale(0.95);
}

/* ===== CONTROLS PANEL ===== */
.controls-panel {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.8);
  width: min(90vw, 800px);
  max-height: 80vh;
  background: var(--card-bg);
  backdrop-filter: var(--blur-lg);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  box-shadow: var(--shadow-lg);
  z-index: 2000;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
  overflow: hidden;
}

.controls-panel:not(.hidden) {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
  pointer-events: auto;
}

.controls-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 2rem;
  border-bottom: 1px solid var(--border-color);
  background: rgba(255, 255, 255, 0.02);
}

.controls-header h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.close-btn {
  width: 32px;
  height: 32px;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.close-btn:hover {
  background: var(--danger-color);
  color: white;
}

.controls-content {
  padding: 2rem;
  max-height: calc(80vh - 80px);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--primary-color) transparent;
}

.control-section {
  margin-bottom: 2rem;
}

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

.control-section h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* ===== BUTTONS ===== */
.button-group {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.control-btn {
  padding: 0.75rem 1.5rem;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  background: var(--card-bg);
  color: var(--text-primary);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  backdrop-filter: var(--blur-sm);
}

.control-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.control-btn.primary,
.control-btn.active {
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  border-color: var(--primary-color);
  color: white;
}

/* ===== SLIDERS ===== */
.slider-group {
  margin-bottom: 1.5rem;
}

.slider-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.slider-header label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.value-display {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary-color);
  background: rgba(102, 126, 234, 0.1);
  padding: 0.25rem 0.5rem;
  border-radius: 6px;
}

.speed-slider {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  outline: none;
  -webkit-appearance: none;
  appearance: none;
  cursor: pointer;
  margin-bottom: 0.5rem;
}

.speed-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
  transition: var(--transition);
}

.speed-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 4px 16px rgba(102, 126, 234, 0.5);
}

.speed-slider::-moz-range-thumb {
  width: 20px;
  height: 20px;
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  border-radius: 50%;
  cursor: pointer;
  border: none;
  box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

.slider-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ===== TOGGLES ===== */
.toggle-group {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.toggle-switch {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
  user-select: none;
}

.toggle-switch input {
  display: none;
}

.toggle-slider {
  position: relative;
  width: 44px;
  height: 24px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  transition: var(--transition);
}

.toggle-slider::before {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  background: var(--text-secondary);
  border-radius: 50%;
  transition: var(--transition);
}

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

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

.toggle-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ===== PLANET CONTROLS ===== */
.planet-controls-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  max-height: 300px;
  overflow-y: auto;
}

.planet-control {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1rem;
  transition: var(--transition);
  backdrop-filter: var(--blur-sm);
  -webkit-backdrop-filter: var(--blur-sm);
}

.planet-control:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.planet-control label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
}

/* ===== INFO PANELS ===== */
.info-panel {
  position: fixed;
  top: 2rem;
  right: 2rem;
  width: min(280px, 90vw);
  max-width: 300px;
  background: var(--card-bg);
  backdrop-filter: var(--blur-lg);
  -webkit-backdrop-filter: var(--blur-lg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  z-index: 1500;
  opacity: 0;
  transform: translateX(100%);
  transition: var(--transition);
}

.info-panel.visible {
  opacity: 1;
  transform: translateX(0);
}

.info-header {
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--primary-color);
}

.info-content {
  padding: 1rem;
}

.control-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

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

.control-key {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--primary-color);
  font-weight: 600;
}

.control-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ===== PLANET INFO PANEL ===== */
.planet-info-panel {
  position: fixed;
  bottom: 2rem;
  left: 2rem;
  width: min(350px, 90vw);
  background: var(--card-bg);
  backdrop-filter: var(--blur-lg);
  -webkit-backdrop-filter: var(--blur-lg);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
  z-index: 1500;
  opacity: 0;
  transform: translateY(100%);
  transition: var(--transition);
}

.planet-info-panel:not(.hidden) {
  opacity: 1;
  transform: translateY(0);
}

.planet-info-header {
  padding: 1.25rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.planet-info-header h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
}

.planet-info-content {
  padding: 1.25rem;
}

.planet-stats {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.stat-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.stat-item:last-child {
  border-bottom: none;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.stat-value {
  font-size: 0.875rem;
  color: var(--primary-color);
  font-weight: 600;
}

/* ===== TOOLTIP ===== */
.tooltip {
  position: fixed;
  background: var(--darker-bg);
  color: var(--text-primary);
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  pointer-events: none;
  z-index: 2500;
  opacity: 0;
  transform: translateY(10px);
  transition: var(--transition-fast);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  backdrop-filter: var(--blur-md);
  -webkit-backdrop-filter: var(--blur-md);
  max-width: 200px;
  text-align: center;
}

.tooltip.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== PLANET COLORS ===== */
.planet-mercury {
  color: #8c7853;
}
.planet-venus {
  color: #ffc649;
}
.planet-earth {
  color: #6b93d6;
}
.planet-mars {
  color: #c1440e;
}
.planet-jupiter {
  color: #d8ca9d;
}
.planet-saturn {
  color: #fad5a5;
}
.planet-uranus {
  color: #4fd0e7;
}
.planet-neptune {
  color: #4b70dd;
}

/* ===== SCROLLBAR STYLES ===== */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb {
  background: var(--primary-color);
  border-radius: 3px;
  transition: var(--transition);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--secondary-color);
}

/* ===== ANIMATIONS ===== */
@keyframes heroFadeIn {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scrollPulse {
  0%,
  100% {
    opacity: 0.7;
    transform: translateY(0);
  }
  50% {
    opacity: 1;
    transform: translateY(5px);
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
  .hero-title {
    font-size: 2.5rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .hero-btn {
    width: 100%;
    max-width: 300px;
    justify-content: center;
  }

  .controls-panel {
    width: 95vw;
    max-height: 85vh;
  }

  .controls-content {
    padding: 1.5rem;
  }

  .button-group {
    flex-direction: column;
  }

  .control-btn {
    width: 100%;
    justify-content: center;
  }

  .planet-controls-grid {
    grid-template-columns: 1fr;
  }

  .floating-action-btn {
    bottom: 1rem;
    right: 1rem;
    width: 50px;
    height: 50px;
    font-size: 1.25rem;
  }

  .back-to-top-btn {
    bottom: 6rem; /* Adjust for smaller mobile spacing */
    right: 1rem;
    width: 45px;
    height: 45px;
    font-size: 1.1rem;
  }

  .info-panel {
    top: 1rem;
    right: 1rem;
    left: auto;
    width: min(280px, calc(100vw - 2rem));
    transform: translateX(100%);
  }

  .info-panel.visible {
    transform: translateX(0);
  }

  .control-item {
    padding: 0.5rem 0;
  }

  .planet-info-panel {
    bottom: 1rem;
    left: 1rem;
    width: calc(100vw - 2rem);
  }
}

@media (max-width: 480px) {
  .hero-content {
    padding: 1rem;
  }

  .controls-content {
    padding: 1rem;
  }

  .control-section h3 {
    font-size: 0.875rem;
  }

  .control-btn {
    padding: 0.625rem 1rem;
    font-size: 0.75rem;
  }
}

/* ===== UTILITY CLASSES ===== */
.hidden {
  display: none !important;
}

.invisible {
  opacity: 0 !important;
  pointer-events: none !important;
}

.no-scroll {
  overflow: hidden;
}
.control-btn.primary {
  background: linear-gradient(145deg, #4a9eff, #3d7acc);
  border-color: #4a9eff;
  box-shadow: 0 4px 15px rgba(74, 158, 255, 0.3);
}

.control-btn.active:hover,
.control-btn.primary:hover {
  background: linear-gradient(145deg, #5aa8ff, #4a9eff);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(74, 158, 255, 0.4);
}

.control-btn .icon {
  font-size: 16px;
}

/* Slider Styles */
.slider-group {
  margin-bottom: 20px;
}

.slider-group label {
  display: block;
  margin-bottom: 10px;
  font-size: 14px;
  color: #ccc;
  text-align: center;
  font-weight: 500;
}

.speed-slider {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  outline: none;
  border-radius: 3px;
  -webkit-appearance: none;
  appearance: none;
  transition: all 0.3s ease;
}

.speed-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  background: linear-gradient(145deg, #4a9eff, #3d7acc);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(74, 158, 255, 0.4);
  transition: all 0.3s ease;
}

.speed-slider::-webkit-slider-thumb:hover {
  transform: scale(1.1);
  box-shadow: 0 4px 12px rgba(74, 158, 255, 0.6);
}

.speed-slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  background: linear-gradient(145deg, #4a9eff, #3d7acc);
  border-radius: 50%;
  cursor: pointer;
  border: none;
  box-shadow: 0 2px 8px rgba(74, 158, 255, 0.4);
}

/* Planet Controls Grid */
.planet-controls-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 15px;
  max-height: 200px;
  overflow-y: auto;
}

.planet-control {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  padding: 15px;
  transition: all 0.3s ease;
}

.planet-control:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-2px);
}

.planet-control label {
  display: block;
  margin-bottom: 8px;
  font-size: 13px;
  font-weight: 500;
}

/* Planet Colors */
.planet-mercury {
  color: #8c7853;
  text-shadow: 0 0 5px rgba(140, 120, 83, 0.5);
}
.planet-venus {
  color: #ffc649;
  text-shadow: 0 0 5px rgba(255, 198, 73, 0.5);
}
.planet-earth {
  color: #6b93d6;
  text-shadow: 0 0 5px rgba(107, 147, 214, 0.5);
}
.planet-mars {
  color: #c1440e;
  text-shadow: 0 0 5px rgba(193, 68, 14, 0.5);
}
.planet-jupiter {
  color: #d8ca9d;
  text-shadow: 0 0 5px rgba(216, 202, 157, 0.5);
}
.planet-saturn {
  color: #fad5a5;
  text-shadow: 0 0 5px rgba(250, 213, 165, 0.5);
}
.planet-uranus {
  color: #4fd0e7;
  text-shadow: 0 0 5px rgba(79, 208, 231, 0.5);
}
.planet-neptune {
  color: #4b70dd;
  text-shadow: 0 0 5px rgba(75, 112, 221, 0.5);
}

/* Info Panel */
#info {
  position: absolute;
  top: 20px;
  right: 20px;
  background: linear-gradient(145deg, rgba(0, 0, 0, 0.8), rgba(0, 0, 0, 0.6));
  padding: 20px;
  border-radius: 15px;
  font-size: 13px;
  color: #ccc;
  max-width: 250px;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.info-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 15px;
  color: #4a9eff;
  font-weight: 600;
}

.info-header .icon {
  font-size: 16px;
}

.control-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  padding: 5px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.control-item:last-child {
  border-bottom: none;
  margin-bottom: 0;
}

.control-key {
  font-weight: 500;
  color: #4a9eff;
  font-size: 12px;
}

.control-desc {
  color: #ccc;
  font-size: 12px;
}

/* Tooltip */
#tooltip {
  position: absolute;
  background: linear-gradient(145deg, rgba(0, 0, 0, 0.95), rgba(0, 0, 0, 0.8));
  color: white;
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 13px;
  pointer-events: none;
  z-index: 1001;
  display: none;
  border: 1px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
  max-width: 200px;
}

/* Scrollbar Styles */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb {
  background: rgba(74, 158, 255, 0.5);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(74, 158, 255, 0.7);
}

/* Responsive Design */
@media (max-width: 768px) {
  #controls {
    padding: 15px;
    gap: 20px;
    flex-direction: column;
  }

  .control-section {
    min-width: auto;
    max-width: none;
  }

  .button-group {
    justify-content: center;
  }

  .control-btn {
    padding: 10px 15px;
    font-size: 12px;
  }

  .planet-controls-grid {
    grid-template-columns: 1fr;
    max-height: 150px;
  }

  #info {
    max-width: 200px;
    font-size: 11px;
    padding: 15px;
  }

  #tooltip {
    font-size: 11px;
    padding: 8px 12px;
  }
}

@media (max-width: 480px) {
  #controls {
    padding: 10px;
    max-height: 50vh;
  }

  .control-section h3 {
    font-size: 14px;
  }

  .control-btn {
    padding: 8px 12px;
    font-size: 11px;
  }

  .planet-control {
    padding: 10px;
  }

  #info {
    top: 10px;
    right: 10px;
    padding: 10px;
    font-size: 10px;
  }
}

/* Animation for loading */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

#controls {
  animation: fadeIn 0.5s ease-out;
}

#info {
  animation: fadeIn 0.5s ease-out 0.2s both;
}