:root {
  --line-offset: 8.5rem; 
}
* {
  box-sizing: border-box;
}

html{
     margin: 0;
     min-height: 100%;
     background: radial-gradient(circle at top, #10151f, #06080d);
}

body {
  margin: 0;
  min-height: 100%;
  background: radial-gradient(circle at top, #10151f, #06080d);
  overscroll-behavior-y: none;
  overflow-y: hidden;
  color: #eaeaf0;
  font-family: Inter, system-ui, sans-serif;
  overflow-x: hidden;
}

.hero {
  text-align: center;
  padding: 5rem 1rem 3rem;
}

.hero h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  letter-spacing: -0.02em;
}

.hero p {
  opacity: 0.75;
  max-width: 600px;
  margin: 1rem auto 0;
}

/* Fullscreen timeline section */
.timeline-section {
  position: relative;
  height: 100vh;
  overflow-x: auto;
  overflow-y: hidden;
}

/* Horizontal center line */
.timeline-line {
  position: absolute;
  top: 50%;
  left: 0;
  height: 4px;
  width: 200%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255,255,255,0.4),
    transparent
  );
  transform: translateY(-50%);
}

/* Timeline container */
.timeline {
  position: relative;
  display: flex;
  gap: 6rem;
  padding: 0 6rem;
  align-items: center;
  height: 100%;
  min-width: max-content;
}

/* Event base */
.event {
  opacity: 0;
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.event.visible {
  opacity: 1;
}

.event.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Above / below positioning */
.event.above {
  transform: translateY(calc(-1 * var(--line-offset)));
}

.event.below {
  transform: translateY(var(--line-offset));
}

.event-year {
  font-size: 0.85rem;
  opacity: 0.6;
  margin-bottom: 0.4rem;
}

/* Event card */
.event-card {
  background: rgba(255,255,255,0.08);
  backdrop-filter: blur(14px);
  border-radius: 16px;
  padding: 1.5rem;
  box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}

.event-title {
  margin: 0 0 0.5rem;
}

.event-text {
  font-size: 0.95rem;
  line-height: 1.6;
}

.event-media img {
  width: 100%;
  border-radius: 12px;
  margin-top: 1rem;
  cursor: zoom-in;
}