:root {
  --bg-dark: #0f141d;
  --panel-bg: rgba(20, 30, 48, 0.65);
  --panel-border: rgba(255, 255, 255, 0.08);
  --accent-color: #00e676;
  --accent-glow: rgba(0, 230, 118, 0.4);
  --text-primary: #f5f6fa;
  --text-secondary: #a0a8c0;
  --font-hud: 'Outfit', sans-serif;
  --font-retro: 'Press Start 2P', monospace;
}

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

body, html {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: var(--bg-dark);
  font-family: var(--font-hud);
  color: var(--text-primary);
}

/* Three.js Canvas */
#game-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: block;
  z-index: 1;
}

/* Crosshair */
#crosshair {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 12px;
  height: 12px;
  transform: translate(-50%, -50%);
  z-index: 10;
  pointer-events: none;
}

#crosshair::before, #crosshair::after {
  content: '';
  position: absolute;
  background-color: rgba(255, 255, 255, 0.85);
  box-shadow: 0 0 4px rgba(0, 0, 0, 0.5);
}

#crosshair::before {
  top: 5px;
  left: 0;
  width: 12px;
  height: 2px;
}

#crosshair::after {
  top: 0;
  left: 5px;
  width: 2px;
  height: 12px;
}

/* Glassmorphism Panel base */
.glass-panel {
  background: var(--panel-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

/* Lobby / Main Menu Overlay */
#lobby-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 20;
  display: flex;
  justify-content: center;
  align-items: center;
  background: radial-gradient(circle at center, rgba(16, 24, 48, 0.6) 0%, rgba(8, 10, 18, 0.95) 100%);
  transition: opacity 0.5s ease;
}

#lobby-container.hidden {
  opacity: 0;
  pointer-events: none;
}

.lobby-card {
  width: 460px;
  padding: 40px;
  text-align: center;
  animation: slideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes slideUp {
  0% {
    transform: translateY(30px);
    opacity: 0;
  }
  100% {
    transform: translateY(0);
    opacity: 1;
  }
}

.logo-title {
  font-family: var(--font-retro);
  font-size: 2.2rem;
  letter-spacing: 2px;
  margin-bottom: 8px;
  background: linear-gradient(135deg, #00e676 0%, #00b0ff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 2px 8px rgba(0, 230, 118, 0.3));
}

.logo-subtitle {
  font-size: 0.95rem;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 35px;
  font-weight: 600;
}

.input-group {
  margin-bottom: 25px;
  text-align: left;
}

.input-group label {
  display: block;
  font-family: var(--font-retro);
  font-size: 0.65rem;
  color: var(--text-secondary);
  margin-bottom: 10px;
  letter-spacing: 1px;
}

.input-group input[type="text"] {
  width: 100%;
  padding: 14px 20px;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  font-family: var(--font-hud);
  font-size: 1.1rem;
  color: var(--text-primary);
  outline: none;
  transition: all 0.3s ease;
}

.input-group input[type="text"]:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 10px var(--accent-glow);
  background: rgba(0, 0, 0, 0.45);
}

.color-picker-container {
  display: flex;
  gap: 12px;
  margin-top: 5px;
}

.color-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

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

.color-btn.active {
  border-color: #fff;
  transform: scale(1.1);
  box-shadow: 0 0 12px rgba(255, 255, 255, 0.4);
}

.glow-button {
  width: 100%;
  padding: 16px;
  font-family: var(--font-retro);
  font-size: 0.9rem;
  color: #05070a;
  background: linear-gradient(90deg, #00e676, #00b0ff);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-weight: bold;
  letter-spacing: 1px;
  box-shadow: 0 4px 20px var(--accent-glow);
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  margin-top: 10px;
}

.glow-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 26px rgba(0, 230, 118, 0.6);
  filter: brightness(1.1);
}

.glow-button:active {
  transform: translateY(1px);
  box-shadow: 0 2px 10px var(--accent-glow);
}

.controls-legend {
  margin-top: 35px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 25px;
  text-align: left;
}

.controls-legend h3 {
  font-family: var(--font-retro);
  font-size: 0.65rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.controls-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

kbd {
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 4px;
  padding: 2px 6px;
  margin-right: 4px;
  font-family: monospace;
  font-size: 0.75rem;
  color: var(--text-primary);
  box-shadow: 0 2px 0 rgba(0, 0, 0, 0.4);
}

/* In-Game HUD overlay */
#hud {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 5;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

#hud.hidden {
  opacity: 0;
  pointer-events: none;
}

#stats-panel {
  position: absolute;
  top: 20px;
  left: 20px;
  padding: 15px 20px;
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--text-secondary);
  pointer-events: auto;
}

#stats-panel strong {
  color: var(--text-primary);
}

/* Chat Module */
#chat-container {
  position: absolute;
  bottom: 130px;
  left: 20px;
  width: 380px;
  z-index: 10;
  pointer-events: auto;
}

#chat-messages {
  max-height: 200px;
  overflow-y: auto;
  margin-bottom: 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  /* Mask gradient for smooth scroll fade-out at the top */
  mask-image: linear-gradient(to bottom, transparent 0%, black 15%);
  -webkit-mask-image: linear-gradient(to bottom, transparent 0%, black 15%);
}

.chat-msg {
  background: rgba(0, 0, 0, 0.4);
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 0.85rem;
  word-break: break-word;
  animation: fadeInMsg 0.2s ease-out;
  border-left: 3px solid rgba(255, 255, 255, 0.2);
}

.chat-msg.system {
  border-left-color: #00b0ff;
  color: #80d8ff;
  font-style: italic;
}

.chat-msg.user {
  border-left-color: var(--accent-color);
}

@keyframes fadeInMsg {
  from { opacity: 0; transform: translateX(-10px); }
  to { opacity: 1; transform: translateX(0); }
}

#chat-input {
  width: 100%;
  padding: 10px 15px;
  background: rgba(0, 0, 0, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 6px;
  font-family: var(--font-hud);
  font-size: 0.9rem;
  color: var(--text-primary);
  outline: none;
  opacity: 0;
  transition: opacity 0.2s ease, border-color 0.2s ease;
  pointer-events: none;
}

#chat-input.active {
  opacity: 1;
  pointer-events: auto;
  border-color: var(--accent-color);
}

/* Hotbar Selection */
#hotbar-container {
  position: absolute;
  bottom: 25px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  pointer-events: auto;
}

#hotbar {
  display: flex;
  background: rgba(10, 16, 26, 0.8);
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  padding: 6px;
  gap: 6px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.hotbar-slot {
  width: 52px;
  height: 52px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 8px;
  position: relative;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

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

.hotbar-slot.active {
  background: rgba(0, 230, 118, 0.1);
  border: 2px solid var(--accent-color);
  box-shadow: 0 0 12px var(--accent-glow);
  transform: scale(1.08) translateY(-4px);
}

.hotbar-slot canvas {
  width: 40px;
  height: 40px;
  image-rendering: pixelated;
}

.hotbar-slot-num {
  position: absolute;
  top: 2px;
  left: 4px;
  font-size: 0.65rem;
  color: var(--text-secondary);
  font-family: var(--font-retro);
}

/* Block Label above hotbar */
#block-label {
  position: absolute;
  bottom: 95px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.7);
  padding: 6px 14px;
  border-radius: 15px;
  font-size: 0.85rem;
  letter-spacing: 0.5px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  transition: opacity 0.2s ease, transform 0.2s ease;
  pointer-events: none;
  opacity: 0;
}

#block-label.show {
  opacity: 1;
  transform: translate(-50%, -5px);
}

/* Loading overlay */
#loading-screen {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--bg-dark);
  z-index: 30;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: opacity 0.5s ease;
}

#loading-screen.hidden {
  opacity: 0;
  pointer-events: none;
}

.loader-box {
  text-align: center;
}

.spinner {
  width: 50px;
  height: 50px;
  border: 3px solid rgba(255, 255, 255, 0.1);
  border-top-color: var(--accent-color);
  border-radius: 50%;
  animation: spin 1s infinite linear;
  margin: 0 auto 20px;
  box-shadow: 0 0 15px var(--accent-glow);
}

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

#loading-text {
  font-family: var(--font-retro);
  font-size: 0.75rem;
  color: var(--text-secondary);
  letter-spacing: 1px;
}

/* Custom Scrollbar for Chat */
#chat-messages::-webkit-scrollbar {
  width: 4px;
}
#chat-messages::-webkit-scrollbar-track {
  background: transparent;
}
#chat-messages::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.2);
  border-radius: 2px;
}
#chat-messages::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.4);
}