/* === NEXUS DESIGN SYSTEM === */
:root {
  --font-display: 'Orbitron', sans-serif;
  --font-body: 'JetBrains Mono', monospace;

  --color-bg: #050510;
  --color-surface: rgba(10, 15, 40, 0.85);
  --color-border: rgba(74, 240, 192, 0.2);
  --color-border-bright: rgba(74, 240, 192, 0.5);

  --color-text: #c8d8e8;
  --color-text-muted: #5a6a8a;
  --color-text-bright: #e0f0ff;

  --color-primary: #4af0c0;
  --color-primary-dim: rgba(74, 240, 192, 0.3);
  --color-secondary: #7b5cff;
  --color-danger: #ff4466;
  --color-warning: #ffaa22;
  --color-gold: #ffd700;

  --text-xs: 11px;
  --text-sm: 13px;
  --text-base: 15px;
  --text-lg: 18px;
  --text-xl: 24px;
  --text-2xl: 36px;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;

  --panel-blur: 16px;
  --panel-radius: 8px;
  --transition-ui: 200ms cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

canvas#nexus-canvas {
  display: block;
  width: 100vw;
  height: 100vh;
  position: fixed;
  top: 0;
  left: 0;
}

/* === LOADING SCREEN === */
#loading-screen {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.8s ease;
}
#loading-screen.fade-out {
  opacity: 0;
  pointer-events: none;
}
.loader-content {
  text-align: center;
}
.loader-sigil {
  margin-bottom: var(--space-6);
}
.loader-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: 0.3em;
  color: var(--color-primary);
  text-shadow: 0 0 30px rgba(74, 240, 192, 0.4);
  margin-bottom: var(--space-2);
}
.loader-subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  letter-spacing: 0.1em;
  margin-bottom: var(--space-6);
}
.loader-bar {
  width: 200px;
  height: 2px;
  background: rgba(74, 240, 192, 0.15);
  border-radius: 1px;
  margin: 0 auto;
  overflow: hidden;
}
.loader-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  border-radius: 1px;
  transition: width 0.3s ease;
}

/* === ENTER PROMPT === */
#enter-prompt {
  position: fixed;
  inset: 0;
  z-index: 500;
  background: rgba(5, 5, 16, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: opacity 0.5s ease;
}
#enter-prompt.fade-out {
  opacity: 0;
  pointer-events: none;
}
.enter-content {
  text-align: center;
}
.enter-content h2 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-primary);
  letter-spacing: 0.2em;
  text-shadow: 0 0 20px rgba(74, 240, 192, 0.3);
  margin-bottom: var(--space-2);
}
.enter-content p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  animation: pulse-text 2s ease-in-out infinite;
}
@keyframes pulse-text {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

/* === GAME UI (HUD) === */
.game-ui {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 10;
  font-family: var(--font-body);
  color: var(--color-text);
}
.game-ui button, .game-ui input, .game-ui [data-interactive] {
  pointer-events: auto;
}

/* Debug overlay */
.hud-debug {
  position: absolute;
  top: var(--space-3);
  left: var(--space-3);
  background: rgba(0, 0, 0, 0.7);
  color: #0f0;
  font-size: var(--text-xs);
  line-height: 1.5;
  padding: var(--space-2) var(--space-3);
  border-radius: 4px;
  white-space: pre;
  pointer-events: none;
  font-variant-numeric: tabular-nums lining-nums;
}

/* Location indicator */
.hud-location {
  position: absolute;
  top: var(--space-3);
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.15em;
  color: var(--color-primary);
  text-shadow: 0 0 10px rgba(74, 240, 192, 0.3);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.hud-location-icon {
  font-size: 16px;
  animation: spin-slow 10s linear infinite;
}
@keyframes spin-slow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Controls hint */
.hud-controls {
  position: absolute;
  bottom: var(--space-3);
  left: var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  pointer-events: none;
}
.hud-controls span {
  color: var(--color-primary);
  font-weight: 600;
}

/* === CHAT PANEL === */
.chat-panel {
  position: absolute;
  bottom: var(--space-4);
  right: var(--space-4);
  width: 380px;
  max-height: 400px;
  background: var(--color-surface);
  backdrop-filter: blur(var(--panel-blur));
  border: 1px solid var(--color-border);
  border-radius: var(--panel-radius);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  pointer-events: auto;
  transition: max-height var(--transition-ui);
}
.chat-panel.collapsed {
  max-height: 42px;
}
.chat-header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
  font-family: var(--font-display);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  font-weight: 500;
  color: var(--color-text-bright);
  cursor: pointer;
  flex-shrink: 0;
}
.chat-status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-primary);
  box-shadow: 0 0 6px var(--color-primary);
  animation: dot-pulse 2s ease-in-out infinite;
}
@keyframes dot-pulse {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 1; }
}
.chat-toggle-btn {
  margin-left: auto;
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-size: 14px;
  cursor: pointer;
  transition: transform var(--transition-ui);
}
.chat-panel.collapsed .chat-toggle-btn {
  transform: rotate(180deg);
}
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-3) var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  max-height: 280px;
  scrollbar-width: thin;
  scrollbar-color: rgba(74,240,192,0.2) transparent;
}
.chat-msg {
  font-size: var(--text-xs);
  line-height: 1.6;
  padding: var(--space-1) 0;
}
.chat-msg-prefix {
  font-weight: 700;
}
.chat-msg-system .chat-msg-prefix { color: var(--color-text-muted); }
.chat-msg-timmy .chat-msg-prefix { color: var(--color-primary); }
.chat-msg-user .chat-msg-prefix { color: var(--color-gold); }
.chat-msg-error .chat-msg-prefix { color: var(--color-danger); }

.chat-input-row {
  display: flex;
  border-top: 1px solid var(--color-border);
  flex-shrink: 0;
}
.chat-input {
  flex: 1;
  background: transparent;
  border: none;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-text-bright);
  outline: none;
}
.chat-input::placeholder {
  color: var(--color-text-muted);
}
.chat-send-btn {
  background: none;
  border: none;
  border-left: 1px solid var(--color-border);
  padding: var(--space-3) var(--space-4);
  color: var(--color-primary);
  font-size: 16px;
  cursor: pointer;
  transition: background var(--transition-ui);
}
.chat-send-btn:hover {
  background: rgba(74, 240, 192, 0.1);
}

/* === FOOTER === */
.nexus-footer {
  position: fixed;
  bottom: var(--space-1);
  left: 50%;
  transform: translateX(-50%);
  z-index: 5;
  font-size: 10px;
  opacity: 0.3;
}
.nexus-footer a {
  color: var(--color-text-muted);
  text-decoration: none;
}
.nexus-footer a:hover {
  color: var(--color-primary);
}

/* Mobile adjustments */
@media (max-width: 480px) {
  .chat-panel {
    width: calc(100vw - 32px);
    right: var(--space-4);
    bottom: var(--space-4);
  }
  .hud-controls {
    display: none;
  }
}