:root {
  color-scheme: dark;
  --accent: #ffd166;
  --accent-soft: rgba(255, 209, 102, 0.2);
  --bg-gradient: radial-gradient(circle at top left, #1f2233, #0c0d14 65%);
}

body {
  font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg-gradient);
  min-height: 100vh;
}

.hero {
  background: linear-gradient(
    135deg,
    rgba(255, 209, 102, 0.08),
    rgba(0, 0, 0, 0)
  );
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.text-gradient {
  background: linear-gradient(135deg, #ffd166, #f77f00 50%, #d62828);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.story-card {
  background: rgba(10, 12, 22, 0.92);
  border-radius: 1.5rem;
  border: 1px solid rgba(255, 209, 102, 0.24);
  padding: 2.5rem 2rem;
}

.story-card .icon {
  font-weight: 600;
  color: #ffd166;
  font-size: 1.15rem;
  margin-right: 1rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  background: rgba(255, 209, 102, 0.08);
}

.section {
  position: relative;
}

.section::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0.05;
  background-image: radial-gradient(
      circle at 20% 20%,
      rgba(255, 209, 102, 0.3),
      transparent 40%
    ),
    radial-gradient(circle at 80% 20%, rgba(247, 127, 0, 0.2), transparent 40%);
  pointer-events: none;
}

.section-glow {
  background: rgba(255, 255, 255, 0.02);
  border-block: 1px solid rgba(255, 209, 102, 0.14);
}

.section-panel {
  background: rgba(12, 13, 20, 0.85);
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.cta-block {
  background: rgba(10, 12, 22, 0.85);
  border-radius: 1rem;
  border: 1px dashed rgba(255, 209, 102, 0.4);
  padding: 1.5rem 2rem;
  font-size: 1.125rem;
  display: inline-flex;
  flex-direction: column;
  gap: 0.5rem;
}

.guided-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.guided-step {
  background: rgba(17, 20, 33, 0.85);
  border-radius: 1.25rem;
  padding: 1.75rem;
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.guided-step.active,
.guided-step:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 209, 102, 0.4);
}

.timeline {
  display: grid;
  gap: 1.5rem;
}

.timeline-item {
  border-left: 3px solid rgba(255, 209, 102, 0.25);
  padding-left: 1.5rem;
  padding-bottom: 0.5rem;
  position: relative;
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.timeline-item::before {
  content: '';
  position: absolute;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255, 209, 102, 0.25);
  border: 2px solid rgba(255, 209, 102, 0.5);
  top: 0.35rem;
  left: -9px;
}

.timeline-item.active,
.timeline-item:hover {
  border-color: rgba(255, 209, 102, 0.6);
  transform: translateX(6px);
}

.timeline-item.active::before,
.timeline-item:hover::before {
  background: #ffd166;
}

.timeline-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 90px;
  height: 32px;
  border-radius: 999px;
  background: rgba(255, 209, 102, 0.12);
  color: #ffd166;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.mermaid {
  background: rgba(10, 12, 22, 0.92);
  border-radius: 1rem;
  padding: 1.5rem;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.observatory-controls {
  background: rgba(15, 18, 30, 0.85);
  border: 1px solid rgba(255, 209, 102, 0.2);
  border-radius: 1rem;
  padding: 1.5rem;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.3);
}

.observatory-card {
  background: rgba(10, 12, 22, 0.9);
  border-radius: 1rem;
  border: 1px solid rgba(255, 255, 255, 0.04);
  padding: 1.25rem;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.observatory-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 209, 102, 0.4);
}

.observatory-card h3 {
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255, 209, 102, 0.85);
  margin-bottom: 0.5rem;
}

.observatory-card p {
  font-size: 1.4rem;
  font-weight: 600;
}

.observatory-card small {
  display: block;
  color: rgba(255, 255, 255, 0.6);
}

footer {
  background: rgba(0, 0, 0, 0.4);
  border-top: 1px solid rgba(255, 255, 255, 0.04);
}

@media (max-width: 768px) {
  .story-card {
    padding: 2rem 1.5rem;
  }
  .guided-step {
    padding: 1.5rem;
  }
}