:root {
  --font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  
  /* Primary HSL Theme Colors */
  --bg-dark: 224 71% 4%;
  --card-bg: 222 47% 11%;
  --glass-bg: 224 71% 4% / 45%;
  --border-color: 217.2 32.6% 17.5%;
  --border-glass: 255 255 255 / 8%;
  
  --primary: 221.2 83.2% 53.3%;
  --primary-hover: 226.2 80% 60%;
  --text-light: 210 40% 98%;
  --text-muted: 215.4 16.3% 56.9%;
  
  /* Status Colors */
  --success: 142.1 76.2% 36.3%;
  --danger: 0 84.2% 60.2%;
  
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 6px;
  
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body, html {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: hsl(var(--bg-dark));
  color: hsl(var(--text-light));
  font-family: var(--font-family);
  -webkit-font-smoothing: antialiased;
}

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

/* Glassmorphism base style */
.glass {
  background: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

/* Overlays Container (Login & Loading) */
.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 100;
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  background: radial-gradient(circle at center, rgba(15, 23, 42, 0.85) 0%, rgba(8, 10, 15, 0.95) 100%);
}

.overlay.active {
  opacity: 1;
  pointer-events: auto;
}

/* Spinner */
.spinner-container {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.spinner {
  width: 50px;
  height: 50px;
  border: 3px solid rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  border-top-color: hsl(var(--primary));
  animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Login/Avatar Customizer Card */
.login-card {
  width: 90%;
  max-width: 480px;
  padding: 2.5rem;
  border-radius: var(--radius-lg);
  text-align: left;
  transform: translateY(20px);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.overlay.active .login-card {
  transform: translateY(0);
}

.login-header {
  margin-bottom: 2rem;
  text-align: center;
}

.login-header h1 {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: 2px;
  background: linear-gradient(135deg, #ffffff 0%, #a5b4fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 0.5rem;
}

.login-header p {
  color: hsl(var(--text-muted));
  font-size: 0.95rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 0.6rem;
  color: hsl(var(--text-muted));
}

.form-group input[type="text"] {
  width: 100%;
  padding: 0.9rem 1.2rem;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  color: #fff;
  font-family: var(--font-family);
  font-size: 1rem;
  transition: var(--transition);
}

.form-group input[type="text"]:focus {
  outline: none;
  border-color: hsl(var(--primary));
  box-shadow: 0 0 0 2px hsl(var(--primary) / 25%);
  background: rgba(15, 23, 42, 0.8);
}



/* Color Picker customization */
.color-picker-wrapper {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 0.6rem 1rem;
  border-radius: var(--radius-md);
}

.color-picker-wrapper input[type="color"] {
  -webkit-appearance: none;
  border: none;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  cursor: pointer;
  background: none;
}

.color-picker-wrapper input[type="color"]::-webkit-color-swatch-wrapper {
  padding: 0;
}

.color-picker-wrapper input[type="color"]::-webkit-color-swatch {
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
}

.color-value {
  font-family: monospace;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.5px;
}

/* HUD elements container */
#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 */
}

#hud-container > * {
  pointer-events: auto; /* Re-enable pointer events for UI panels */
}

/* HUD Panels */
.hud-card {
  position: absolute;
  padding: 0.9rem 1.2rem;
  border-radius: var(--radius-md);
}

.stats-card {
  top: 1.5rem;
  left: 1.5rem;
  min-width: 200px;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.stats-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: hsl(var(--danger));
  box-shadow: 0 0 8px hsl(var(--danger));
  transition: var(--transition);
}

.status-dot.connected {
  background-color: hsl(var(--success));
  box-shadow: 0 0 8px hsl(var(--success));
}

.player-name-tag {
  font-weight: 700;
  font-size: 0.95rem;
}

.stats-location {
  font-size: 0.75rem;
  color: hsl(var(--text-muted));
  font-weight: 500;
}

/* Chat HUD Overlay */
.chat-wrapper {
  position: absolute;
  bottom: 1.5rem;
  left: 1.5rem;
  width: 360px;
  max-height: 250px;
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.chat-log {
  flex: 1;
  padding: 0.8rem 1rem;
  overflow-y: auto;
  font-size: 0.85rem;
  line-height: 1.4;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  max-height: 190px;
}

/* Chat messages formatting */
.chat-msg {
  word-wrap: break-word;
}

.chat-author {
  font-weight: 700;
  margin-right: 0.4rem;
}

.system-msg {
  color: #a5b4fc;
  font-style: italic;
  font-size: 0.8rem;
}

.chat-input-row {
  display: flex;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  background: rgba(10, 12, 20, 0.4);
}

.chat-input-row input {
  flex: 1;
  padding: 0.8rem 1rem;
  background: transparent;
  border: none;
  color: #fff;
  font-family: var(--font-family);
  font-size: 0.85rem;
}

.chat-input-row input:focus {
  outline: none;
}

.btn-send {
  padding: 0 1.2rem;
  background: transparent;
  border: none;
  color: hsl(var(--primary));
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition);
}

.btn-send:hover {
  color: hsl(var(--primary-hover));
}

/* Room slide-out panel (Right side) */
#room-panel {
  position: absolute;
  top: 0;
  right: 0;
  width: 400px;
  height: 100%;
  border-left: 1px solid rgba(255, 255, 255, 0.08);
  border-top: none;
  border-right: none;
  border-bottom: none;
  border-radius: 0;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  box-shadow: -8px 0 32px 0 rgba(0, 0, 0, 0.4);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
  transform: translateX(100%);
  opacity: 0;
}

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

.close-panel-btn {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  background: transparent;
  border: none;
  color: hsl(var(--text-muted));
  font-size: 1.2rem;
  cursor: pointer;
  transition: var(--transition);
  z-index: 10;
}

.close-panel-btn:hover {
  color: #fff;
}

.room-header h2 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 0.2rem;
  background: linear-gradient(135deg, #ffffff 0%, #cbd5e1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.room-capacity {
  font-size: 0.8rem;
  color: hsl(var(--text-muted));
  font-weight: 600;
}

/* YouTube Video container aspect ratio */
.video-section {
  width: 100%;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.video-container {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
  height: 0;
  background: #000;
}

.video-container iframe,
.video-container #youtube-player {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.room-players-section {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  min-height: 100px;
}

.room-players-section h3 {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: hsl(var(--text-muted));
}

#room-players-list {
  list-style: none;
  overflow-y: auto;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.room-player-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 0.8rem;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255, 255, 255, 0.04);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
}

.room-player-badge {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.video-control-section {
  position: relative;
}

/* Video configuration overlay modal inside side panel */
#video-input-modal {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  padding: 1.2rem;
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  z-index: 20;
  transition: var(--transition);
  transform: translateY(10px);
  opacity: 0;
  pointer-events: none;
}

#video-input-modal.video-modal-visible {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

#video-input-modal h4 {
  font-size: 0.9rem;
  font-weight: 700;
}

.modal-help {
  font-size: 0.75rem;
  color: hsl(var(--text-muted));
  line-height: 1.3;
}

.modal-input-row {
  display: flex;
  gap: 0.5rem;
}

.modal-input-row input {
  flex: 1;
  padding: 0.5rem 0.8rem;
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  color: #fff;
  font-family: var(--font-family);
  font-size: 0.8rem;
}

.modal-input-row input:focus {
  outline: none;
  border-color: hsl(var(--primary));
}

/* Controls Legend */
.controls-legend {
  position: absolute;
  bottom: 1.5rem;
  right: 1.5rem;
  padding: 0.8rem 1.2rem;
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: hsl(var(--text-muted));
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Slide left when room panel is visible to avoid collision */
#room-panel.room-panel-visible ~ .controls-legend {
  transform: translateX(-415px);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.legend-item kbd {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 4px;
  padding: 0.15rem 0.4rem;
  font-family: monospace;
  color: #fff;
  font-weight: 700;
  box-shadow: 0 2px 0 rgba(0,0,0,0.3);
}

/* Buttons style */
.btn-primary {
  width: 100%;
  padding: 0.9rem;
  background: hsl(var(--primary));
  border: none;
  border-radius: var(--radius-md);
  color: #fff;
  font-family: var(--font-family);
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 4px 14px hsl(var(--primary) / 30%);
}

.btn-primary:hover {
  background: hsl(var(--primary-hover));
  box-shadow: 0 6px 20px hsl(var(--primary) / 40%);
  transform: translateY(-1px);
}

.btn-secondary {
  width: 100%;
  padding: 0.75rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  color: #fff;
  font-family: var(--font-family);
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-sm {
  padding: 0.5rem 0.8rem;
  font-size: 0.8rem;
  width: auto;
}

.btn-text {
  background: transparent;
  border: none;
  color: hsl(var(--text-muted));
  font-size: 0.75rem;
  cursor: pointer;
  align-self: center;
  transition: var(--transition);
}

.btn-text:hover {
  color: #fff;
}

/* Utility visibility classes */
.video-modal-hidden {
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
}

.room-panel-hidden {
  transform: translateX(100%);
  opacity: 0;
}

/* Custom Scrollbar for chat and player list */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

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

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.25);
}

/* Responsive adjustments */
@media (max-width: 768px) {
  #room-panel {
    width: 100%;
    max-width: 100%;
  }

  .chat-wrapper {
    width: calc(100% - 3rem);
    max-height: 180px;
  }

  #room-panel.room-panel-visible ~ .controls-legend {
    display: none; /* Hide controls legend on small screens when panel is open */
  }
}

/* Theater Modal Styles */
.theater-card {
  width: 92%;
  height: 88%;
  max-width: 1400px;
  background: rgba(15, 23, 42, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.6);
  border-radius: 20px;
  display: flex;
  flex-direction: column;
  padding: 24px;
  position: relative;
  z-index: 100;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  backdrop-filter: blur(12px);
}

.close-theater-btn {
  position: absolute;
  top: 20px;
  right: 24px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #fff;
  font-size: 1.2rem;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.close-theater-btn:hover {
  background: rgba(239, 68, 68, 0.2);
  border-color: rgba(239, 68, 68, 0.4);
  color: #f87171;
}

.theater-header {
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 20px;
}

.theater-header h2 {
  margin: 0;
  font-size: 1.6rem;
  font-weight: 700;
  color: #f8fafc;
  text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.theater-body {
  flex: 1;
  background: #000;
  border-radius: 12px;
  overflow: hidden;
  position: relative;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

#theater-player-container {
  width: 100%;
  height: 100%;
}

#theater-player-container iframe {
  width: 100%;
  height: 100%;
  border: none;
}

.theater-placeholder-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: #94a3b8;
  font-size: 1.1rem;
  text-align: center;
}