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

:root {
  --accent: #22d3ee;
  --accent-dim: rgba(34, 211, 238, 0.15);
  --bg: #000000;
  --text: #e4e4e7;
  --text-muted: #71717a;
  --font: 'Space Grotesk', sans-serif;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
  line-height: 1.7;
}

/* Fog Layers */
.fog-layer {
  position: fixed;
  left: 0;
  right: 0;
  height: 200px;
  pointer-events: none;
  z-index: 50;
}

.fog-top {
  top: 0;
  background: linear-gradient(180deg, rgba(0,0,0,0.9) 0%, transparent 100%);
}

.fog-bottom {
  bottom: 0;
  background: linear-gradient(0deg, rgba(0,0,0,0.9) 0%, transparent 100%);
}

/* Header */
.immerse-header {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.spotlight-circle {
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.06) 0%, transparent 70%);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.header-content {
  text-align: center;
  padding: 2rem;
  position: relative;
  z-index: 2;
}

.icon-glow {
  width: 96px;
  height: 96px;
  margin: 0 auto 2rem;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 0 80px rgba(34, 211, 238, 0.15), 0 0 30px rgba(34, 211, 238, 0.08);
}

.icon-glow img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.immerse-header h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
  color: #fff;
}

.subtitle {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 450px;
  margin: 0 auto 2.5rem;
  font-weight: 300;
}

/* Ghost Button */
.ghost-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 28px;
  background: transparent;
  color: var(--accent);
  border: 1px solid rgba(34, 211, 238, 0.3);
  border-radius: 8px;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  font-family: var(--font);
  cursor: pointer;
  transition: all 0.4s ease;
}

.ghost-btn:hover {
  background: var(--accent-dim);
  border-color: var(--accent);
  box-shadow: 0 0 30px rgba(34, 211, 238, 0.1);
}

.ghost-btn.large {
  padding: 16px 40px;
  font-size: 1.05rem;
}

/* Dark Sections */
.dark-section {
  padding: 120px 2rem;
  position: relative;
}

.spotlight-area {
  max-width: 600px;
  margin: 0 auto;
  position: relative;
}

.spotlight-area::before {
  content: '';
  position: absolute;
  top: -60px;
  left: 50%;
  transform: translateX(-50%);
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.03) 0%, transparent 70%);
  pointer-events: none;
}

.spotlight-area.wide {
  max-width: 900px;
}

.spotlight-area.center {
  text-align: center;
}

.label {
  display: block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.25em;
  color: var(--accent);
  margin-bottom: 1rem;
}

.dark-section h2 {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 600;
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}

.content-block p {
  color: var(--text-muted);
  font-size: 1rem;
  font-weight: 300;
  line-height: 1.9;
}

/* Features */
.features-minimal {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2.5rem;
  margin-top: 3rem;
}

.feat {
  position: relative;
}

.feat-line {
  width: 30px;
  height: 2px;
  background: var(--accent);
  margin-bottom: 1.2rem;
  opacity: 0.6;
}

.feat h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
  color: #fff;
}

.feat p {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 300;
  line-height: 1.7;
}

/* Gallery */
.dark-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.dark-thumb {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  aspect-ratio: 16/9;
}

.dark-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.dark-thumb:hover img {
  transform: scale(1.05);
}

.thumb-vignette {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 50%, rgba(0,0,0,0.6) 100%);
  pointer-events: none;
}

/* FAQ */
.faq-dark {
  margin-top: 2rem;
}

.faq-dark details {
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  padding: 1.2rem 0;
}

.faq-dark summary {
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  color: var(--text);
  list-style: none;
  transition: color 0.3s;
}

.faq-dark summary::-webkit-details-marker {
  display: none;
}

.faq-dark summary::before {
  content: '+ ';
  color: var(--accent);
  font-weight: 300;
}

.faq-dark details[open] summary::before {
  content: '− ';
}

.faq-dark summary:hover {
  color: var(--accent);
}

.faq-dark details p {
  margin-top: 0.8rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 300;
  line-height: 1.8;
}

.faq-dark a {
  color: var(--accent);
  text-decoration: none;
}

.faq-dark a:hover {
  text-decoration: underline;
}

/* Download */
.download-dark {
  padding: 140px 2rem;
}

.download-dark h2 {
  margin-bottom: 2rem;
}

/* Footer */
.dark-footer {
  padding: 3rem 2rem;
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.03);
}

.dark-footer nav {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 1rem;
}

.dark-footer nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 300;
  transition: color 0.3s;
}

.dark-footer nav a:hover {
  color: var(--accent);
}

.dark-footer p {
  color: #333;
  font-size: 0.8rem;
}

/* Reveal Animation */
.reveal-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal-up.shown {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive */
@media (max-width: 768px) {
  .dark-section {
    padding: 80px 1.25rem;
  }

  .features-minimal {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .dark-gallery {
    grid-template-columns: 1fr;
  }

  .fog-layer {
    height: 100px;
  }
}

@media (max-width: 480px) {
  .immerse-header h1 {
    font-size: 2rem;
  }

  .icon-glow {
    width: 72px;
    height: 72px;
  }

  .dark-section h2 {
    font-size: 1.6rem;
  }
}