/* ============================================================
   HISTORY.CSS — Timeline Page Styles
   ============================================================ */

.history-hero {
  padding: calc(var(--nav-height) + 4rem) 0 3rem;
  position: relative;
  z-index: 10;
  text-align: center;
}

/* ── Timeline ── */
.timeline-wrapper {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 0 4rem;
}

/* Vertical center line */
.timeline-wrapper::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, transparent, var(--accent-cyan), var(--accent-orange), transparent);
  transform: translateX(-50%);
  opacity: 0.4;
}

/* ── Timeline Entry ── */
.timeline-entry {
  display: grid;
  grid-template-columns: 1fr 60px 1fr;
  align-items: center;
  margin-bottom: 3rem;
  position: relative;
}

.timeline-entry:last-child { margin-bottom: 0; }

/* Alternating: even on right side */
.timeline-entry.right .entry-content-area {
  grid-column: 3;
  text-align: left;
}

.timeline-entry.right .entry-spacer {
  grid-column: 1;
}

.timeline-entry.left .entry-content-area {
  grid-column: 1;
  text-align: right;
}

.timeline-entry.right .entry-content-area { text-align: left; }

/* Center node */
.timeline-node {
  grid-column: 2;
  grid-row: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
}

.node-year {
  font-family: var(--font-heading);
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--bg-primary);
  background: var(--accent-cyan);
  padding: 0.4rem 0.5rem;
  border-radius: 4px;
  letter-spacing: 0.1em;
  box-shadow: var(--glow-cyan);
  text-align: center;
  min-width: 52px;
  line-height: 1;
}

.node-year.orange {
  background: var(--accent-orange);
  box-shadow: var(--glow-orange);
}

.node-year.active {
  animation: nodePulse 2s ease-in-out infinite;
}

@keyframes nodePulse {
  0%, 100% { box-shadow: 0 0 15px rgba(0,245,255,0.6); }
  50%       { box-shadow: 0 0 30px rgba(0,245,255,1), 0 0 60px rgba(0,245,255,0.4); }
}

/* Entry content card */
.entry-content-area {
  padding: 0 1.5rem;
}

.entry-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-cyan);
  border-radius: 8px;
  padding: 1.25rem;
  display: inline-block;
  width: 100%;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
}

.entry-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
  opacity: 0.5;
}

.entry-card:hover {
  border-color: var(--border-cyan-bright);
  box-shadow: var(--glow-cyan);
}

.entry-title {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.08em;
  margin-bottom: 0.4rem;
}

.entry-desc {
  font-family: var(--font-body);
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.entry-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 0.15rem 0.5rem;
  border-radius: 2px;
  margin-bottom: 0.5rem;
}

/* ── Robot Silhouette Background ── */
.robot-silhouette {
  position: absolute;
  right: -100px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20rem;
  opacity: 0.015;
  filter: blur(2px);
  pointer-events: none;
  animation: robotFloat 6s ease-in-out infinite;
}

@keyframes robotFloat {
  0%, 100% { transform: translateY(-50%) translateX(0); }
  50%       { transform: translateY(-52%) translateX(-10px); }
}

/* ── Active Mission Banner ── */
.active-mission-banner {
  background: linear-gradient(135deg, rgba(0,245,255,0.05), rgba(0,255,136,0.05));
  border: 1px solid rgba(0, 255, 136, 0.3);
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 1rem;
  position: relative;
  overflow: hidden;
}

.active-mission-banner::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-green));
}

/* ── Responsive ── */
@media (max-width: 700px) {
  .timeline-wrapper::before { left: 24px; transform: none; }
  .timeline-entry {
    grid-template-columns: 60px 1fr;
    grid-template-rows: auto;
  }
  .timeline-entry.left .entry-content-area,
  .timeline-entry.right .entry-content-area {
    grid-column: 2;
    text-align: left;
    padding: 0 0 0 1rem;
  }
  .timeline-node { grid-column: 1; }
  .entry-spacer { display: none; }
  .robot-silhouette { display: none; }
}