:root {
  --bg-color: #050508;
  --accent-cyan: #00f0ff;
  --accent-pink: #ff007f;
  --text-main: #ffffff;
  --text-dim: #8892b0;
  --glass-bg: rgba(10, 15, 25, 0.6);
  --glass-border: rgba(0, 240, 255, 0.2);
  --font-logo: 'Orbitron', sans-serif;
  --font-ui: 'Inter', sans-serif;
}

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

body {
  background-color: var(--bg-color);
  color: var(--text-main);
  font-family: var(--font-ui);
  overflow: hidden; /* No scrollbars in lobby */
  height: 100vh;
  width: 100vw;
}

/* 3D Background Canvas */
#lobby-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

/* Atmospheric Overlay */
.fx-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at center, transparent 30%, rgba(0,0,0,0.8) 100%),
    repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(0,0,0,0.1) 2px, rgba(0,0,0,0.1) 4px);
  pointer-events: none;
  z-index: 1;
}

/* Main Container */
.lobby-ui-container {
  position: relative;
  z-index: 10;
  height: 100%;
  width: 100%;
  display: flex;
  flex-direction: column;
  padding: 3rem 4rem;
}

/* Header */
.lobby-header {
  margin-bottom: auto;
}

.game-logo {
  font-family: var(--font-logo);
  font-size: 3.5rem;
  font-weight: 900;
  letter-spacing: 0.2rem;
  background: linear-gradient(90deg, #fff, var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 10px rgba(0, 240, 255, 0.3));
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.version-tag {
  font-size: 0.8rem;
  color: var(--accent-pink);
  letter-spacing: 0.1rem;
  font-family: var(--font-logo);
}

/* Sidebar Navigation */
.menu-container {
  width: 400px;
  position: absolute;
  left: 4rem;
  bottom: 6rem;
}

.menu-panel {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  opacity: 0;
  visibility: hidden;
  transform: translateX(-30px);
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.menu-panel.active {
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
}

.menu-panel h2 {
  font-family: var(--font-logo);
  font-size: 1.8rem;
  color: var(--accent-cyan);
  border-bottom: 1px solid var(--glass-border);
  padding-bottom: 0.5rem;
  margin-bottom: 0.5rem;
}

.lore-desc {
  color: var(--text-dim);
  font-size: 0.9rem;
  line-height: 1.4;
  margin-bottom: 1rem;
}

.btn-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

/* Buttons */
.menu-btn {
  position: relative;
  background: transparent;
  border: none;
  width: 100%;
  text-align: left;
  padding: 1rem 1.5rem;
  cursor: pointer;
  overflow: hidden;
  display: flex;
  align-items: center;
}

.menu-btn .btn-text {
  font-family: var(--font-logo);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: 0.1rem;
  position: relative;
  z-index: 2;
  transition: all 0.2s ease;
}

.menu-btn .btn-bg {
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, rgba(0, 240, 255, 0.1), rgba(0, 240, 255, 0.4));
  z-index: 1;
  transform: skewX(-20deg);
  transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  border-left: 4px solid var(--accent-cyan);
}

.menu-btn:hover .btn-bg {
  left: 0;
}

.menu-btn:hover .btn-text {
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.8);
  transform: translateX(10px);
}

/* Special Button Styling */
.btn-exit .btn-bg {
  background: linear-gradient(90deg, rgba(255, 0, 127, 0.1), rgba(255, 0, 127, 0.4));
  border-left-color: var(--accent-pink);
}

.btn-back .btn-text {
  font-size: 1rem;
  color: var(--text-dim);
}

/* Footer Info */
.lobby-footer {
  position: absolute;
  bottom: 2rem;
  right: 4rem;
  font-family: var(--font-logo);
  font-size: 0.85rem;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.status-indicator {
  width: 8px;
  height: 8px;
  background-color: var(--accent-cyan);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-cyan);
  animation: pulse 2s infinite;
}

.highlight {
  color: var(--text-main);
  font-weight: 700;
}

@keyframes pulse {
  0% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
  100% { opacity: 1; transform: scale(1); }
}