:root {
  --bg-dark: #020202;
  --text-primary: #ffffff;
  --text-secondary: #8c8c8c;
  --accent: #d4af37; /* Subtle luxury gold */
  
  --font-display: 'Cinzel', serif;
  --font-body: 'Montserrat', sans-serif;
  
  --z-canvas: -1;
  --z-ui: 10;
  --z-nav: 20;
  --z-loader: 100;
}

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

body {
  background-color: var(--bg-dark);
  color: var(--text-primary);
  font-family: var(--font-body);
  overflow-x: hidden;
  /* Smooth scrolling enforced via GSAP, but native smooth behavior is good */
  scroll-behavior: smooth; 
}

/* Three.js Canvas Container */
#webgl-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: var(--z-canvas);
  pointer-events: auto; /* Allow orbit controls on scroll */
}

/* UI Overlays */
.ui-layer {
  position: relative;
  width: 100%;
  pointer-events: none; /* Let pointer events pass through to canvas... */
}

/* Catch clicks selectively on nav and buttons */
.ui-layer a, .ui-layer button, .ui-layer .configurator-panel {
  pointer-events: auto;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 2rem 4rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: var(--z-nav);
  background: linear-gradient(180deg, rgba(0,0,0,0.8) 0%, rgba(0,0,0,0) 100%);
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: 4px;
}

.nav-links {
  display: flex;
  gap: 3rem;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 2px;
}

.nav-links a {
  color: var(--text-primary);
  text-decoration: none;
  opacity: 0.6;
  transition: opacity 0.3s;
}

.nav-links a:hover {
  opacity: 1;
}

.btn-primary {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.3);
  color: var(--text-primary);
  padding: 0.75rem 2rem;
  font-family: var(--font-body);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  cursor: pointer;
  transition: all 0.3s ease;
  backdrop-filter: blur(5px);
}

.btn-primary:hover {
  background: #fff;
  color: #000;
  border-color: #fff;
}

/* Scroll Sections */
.scroll-container {
  width: 100%;
}

.section {
  width: 100%;
  height: 100vh;
  display: flex;
  align-items: center;
  padding: 0 10vw;
  position: relative;
}

.content-block {
  max-width: 500px;
  /* GSAP will animate opacity later, start visible for fallback */
  background: rgba(0,0,0,0.2);
  backdrop-filter: blur(8px);
  padding: 3rem;
  border-left: 1px solid rgba(255,255,255,0.1);
}

.right-align {
  margin-left: auto;
  border-left: none;
  border-right: 1px solid rgba(255,255,255,0.1);
  text-align: right;
}

.content-block h1.main-title {
  font-family: var(--font-display);
  font-size: 4rem;
  font-weight: 500;
  line-height: 1.1;
  letter-spacing: 8px;
  margin-bottom: 1rem;
}

.content-block h2 {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 400;
  letter-spacing: 4px;
  margin-bottom: 1.5rem;
  text-transform: uppercase;
}

.content-block p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.8;
  letter-spacing: 0.5px;
}

.specs-list {
  list-style: none;
  display: flex;
  gap: 2rem;
  margin-top: 2rem;
  justify-content: flex-end;
}

.specs-list li {
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.specs-list strong {
  display: block;
  font-size: 1.5rem;
  color: var(--text-primary);
  font-weight: 500;
  font-family: var(--font-display);
  margin-bottom: 0.25rem;
}

.scroll-indicator {
  margin-top: 4rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1rem;
}

.scroll-indicator p {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 2px;
}

.mouse-icon {
  width: 24px;
  height: 36px;
  border: 1px solid rgba(255,255,255,0.5);
  border-radius: 12px;
  position: relative;
}

.wheel {
  width: 2px;
  height: 6px;
  background: #fff;
  border-radius: 2px;
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  animation: scrollWheel 2s infinite cubic-bezier(0.15, 0.41, 0.69, 0.94);
}

@keyframes scrollWheel {
  0% { top: 6px; opacity: 1; }
  100% { top: 20px; opacity: 0; }
}

/* Configurator Panel */
.configurator-panel {
  position: fixed;
  bottom: 3rem;
  right: 4rem;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  z-index: var(--z-nav);
}

.config-toggle {
  background: rgba(15,15,15,0.9);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.1);
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  cursor: pointer;
  transition: all 0.3s;
}

.config-toggle:hover {
  background: rgba(255,255,255,0.1);
}

.config-content {
  background: rgba(10,10,10,0.95);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.1);
  padding: 2rem;
  margin-bottom: 1rem;
  width: 320px;
  color: var(--text-primary);
  opacity: 1;
  transition: opacity 0.3s, transform 0.3s;
  transform: translateY(0);
}

.config-content.hidden {
  opacity: 0;
  pointer-events: none;
  transform: translateY(20px);
  display: block !important;
}

.config-section {
  margin-bottom: 1.5rem;
}

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

.config-section h4 {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: 2px;
  margin-bottom: 1rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.color-picker {
  display: flex;
  gap: 1rem;
}

.color-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.3s;
  position: relative;
}

.color-btn.active {
  border-color: #fff;
  transform: scale(1.1);
}

.color-btn::after {
  content: '';
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.3);
  opacity: 0;
  transition: opacity 0.3s;
}

.color-btn.active::after {
  opacity: 1;
}

/* Switch Styles */
.switch-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  letter-spacing: 1px;
}

.switch-container input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: relative;
  width: 44px;
  height: 24px;
  background-color: #333;
  border-radius: 34px;
  cursor: pointer;
  transition: .4s;
}

.slider:before {
  position: absolute;
  content: "";
  height: 16px;
  width: 16px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  border-radius: 50%;
  transition: .4s;
}

input:checked + .slider {
  background-color: #fff;
}

input:checked + .slider:before {
  transform: translateX(20px);
  background-color: #000;
}

.hint {
  font-size: 0.75rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Loading Screen */
.loading-screen {
  position: fixed;
  inset: 0;
  background: var(--bg-dark);
  z-index: var(--z-loader);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 1.2s ease-in-out;
}

.loading-screen.fade-out {
  opacity: 0;
  pointer-events: none;
}

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

.loader-content .logo {
  font-family: var(--font-display);
  font-size: 3rem;
  letter-spacing: 12px;
  margin-bottom: 2rem;
  margin-left: 12px;
}

.progress-bar-container {
  width: 200px;
  height: 2px;
  background: rgba(255,255,255,0.1);
  margin: 0 auto 1rem auto;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  width: 0%;
  background: var(--text-primary);
  transition: width 0.3s ease;
}

.loader-content p {
  font-family: var(--font-body);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--text-secondary);
}

.model-warning {
  position: fixed;
  bottom: 20px;
  left: 20px;
  background: rgba(40, 0, 0, 0.9);
  border: 1px solid red;
  padding: 1rem;
  z-index: 1000;
  max-width: 400px;
}
.model-warning h3 { margin-bottom: 0.5rem; display: flex; align-items: center; gap: 0.5rem; color: #ff4d4d;}
.model-warning p { font-size: 0.85rem; line-height: 1.5; }
.model-warning .small { color: #aaa; margin-top: 0.5rem; font-size: 0.75rem; }