/* ========================================
   HERO SECTION
   ======================================== */

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--space-7);
}

.hero {
  padding-top: var(--space-9);
  max-width: 100%;
  display: flex;
  justify-content: space-between;
  gap: var(--space-7);
  align-items: center;
  margin-bottom: var(--space-8);
}

.hero-copy {
  max-width: 680px;
}

.hero h1 {
  font-family: 'DM Serif Display', serif;
  font-size: var(--text-4xl);
  color: var(--text-primary);
  line-height: 1.1;
  margin-bottom: var(--space-5);
}

.hero h1 .block {
  display: block;
}

.hero-sub {
  font-family: 'DM Sans', sans-serif;
  font-weight: 300;
  font-size: var(--text-lg);
  color: var(--text-secondary);
  margin-bottom: var(--space-7);
}

.hero-links {
  display: flex;
  gap: var(--space-5);
}

.hero-links a {
  font-family: 'DM Sans', sans-serif;
  font-weight: 500;
  font-size: var(--text-sm);
  color: var(--accent);
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: color var(--duration-base) var(--ease);
}

.hero-links a:hover {
  color: var(--accent-hover);
}

.hero-photo-wrap {
  margin: 0;
  width: clamp(190px, 24vw, 280px);
  flex-shrink: 0;
  position: relative;
  overflow: hidden;
  border-radius: 14px;
  transition: transform var(--duration-base) var(--ease),
              box-shadow var(--duration-base) var(--ease);
}

.hero-photo {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: center 20%;
  border-radius: 14px;
  transition: filter var(--duration-base) var(--ease),
              transform var(--duration-base) var(--ease);
}

.hero-photo-caption {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -40%);
  padding: var(--space-2) var(--space-3);
  border-radius: 999px;
  background: rgba(11, 26, 46, 0.78);
  color: #eff5ff;
  text-align: center;
  white-space: nowrap;
  font-size: var(--text-xs);
  opacity: 0;
  transition: opacity var(--duration-base) var(--ease),
              transform var(--duration-base) var(--ease);
}

.hero-photo-wrap.is-active {
  transform: translateY(-6px) scale(1.02);
  box-shadow: 0 18px 36px rgba(11, 26, 46, 0.22);
}

.hero-photo-wrap.is-active .hero-photo {
  filter: blur(2px);
  transform: scale(1.06);
}

.hero-photo-wrap.is-active .hero-photo-caption {
  opacity: 1;
  transform: translate(-50%, -50%);
}

@media (hover: hover) {
  .hero-photo-wrap:hover {
    transform: translateY(-6px) scale(1.02);
    box-shadow: 0 18px 36px rgba(11, 26, 46, 0.22);
  }

  .hero-photo-wrap:hover .hero-photo {
    filter: blur(2px);
    transform: scale(1.06);
  }

  .hero-photo-wrap:hover .hero-photo-caption {
    opacity: 1;
    transform: translate(-50%, -50%);
  }
}

html.dark .hero-photo-wrap:hover {
  box-shadow: 0 18px 36px rgba(77, 132, 255, 0.22);
}

html.dark .hero-photo-wrap.is-active {
  box-shadow: 0 18px 36px rgba(77, 132, 255, 0.22);
}

/* ========================================
   SKILLS SECTION
   ======================================== */

.skills {
  margin-bottom: var(--space-9);
}

.skills h2 {
  font-family: 'DM Serif Display', serif;
  font-size: var(--text-2xl);
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

.skills-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.skill-tag {
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: var(--space-2) var(--space-3);
  letter-spacing: 0.04em;
}

/* ========================================
   TIMELINE SECTION
   ======================================== */

#timeline {
  margin-top: var(--space-9);
  padding-bottom: var(--space-5);
}

.timeline-group {
  margin-bottom: var(--space-9);
}

.timeline-group:last-child {
  margin-bottom: var(--space-4);
}

.timeline-group-label {
  font-family: 'DM Serif Display', serif;
  font-size: var(--text-2xl);
  color: var(--text-secondary);
  margin-bottom: var(--space-7);
  position: relative;
}

.timeline-container {
  position: relative;
  padding-left: 280px;
}

.timeline-container::before {
  content: '';
  position: absolute;
  left: 220px;
  top: 0;
  bottom: 0;
  width: 2px;
  background-color: var(--border);
}

.timeline-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: var(--space-5);
  max-width: 520px;
  margin-bottom: var(--space-7);
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--duration-slow) var(--ease),
              transform var(--duration-slow) var(--ease);
  transition-delay: var(--delay, 0ms);
}

.timeline-card::before {
  content: '';
  position: absolute;
  left: -64px;
  top: 24px;
  width: 10px;
  height: 10px;
  background-color: var(--accent);
  border-radius: 50%;
  transform: translateX(-50%);
}

.timeline-card.visible {
  opacity: 1;
  transform: translateY(0);
}

.timeline-card:hover {
  box-shadow: 0 4px 20px rgba(26, 82, 232, 0.08);
}

html.dark .timeline-card:hover {
  box-shadow: 0 4px 20px rgba(77, 132, 255, 0.12);
}

.timeline-card time {
  font-family: 'JetBrains Mono', monospace;
  font-size: var(--text-xs);
  color: var(--accent);
  display: block;
  margin-bottom: var(--space-3);
}

.timeline-card h3 {
  font-family: 'DM Serif Display', serif;
  font-size: var(--text-lg);
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.timeline-card .institution {
  font-family: 'DM Sans', sans-serif;
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin-bottom: var(--space-3);
}

.timeline-card .description {
  font-family: 'DM Sans', sans-serif;
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

/* ========================================
   QUOTE BOX
   ======================================== */

.quote-box {
  max-width: 860px;
  margin: var(--space-2) auto var(--space-9);
  border-radius: 16px;
  padding: var(--space-6);
  background: #e7ecf4;
  border: 1px solid var(--border);
  color: var(--text-primary);
}

html.dark .quote-box {
  background: #102238;
  border-color: #20324c;
  color: #dce9ff;
}

.quote-mark {
  font-size: var(--text-xl);
  color: var(--accent);
  margin-bottom: var(--space-3);
}

.quote-text {
  font-size: var(--text-lg);
  line-height: 1.5;
  margin-bottom: var(--space-2);
}

.quote-author {
  color: var(--text-secondary);
  margin-bottom: var(--space-4);
}

.quote-note {
  color: var(--text-secondary);
  letter-spacing: 0.02em;
}

/* ========================================
   RESPONSIVE
   ======================================== */

@media (max-width: 640px) {
  main {
    padding: 0 var(--space-4);
  }

  .hero {
    padding-top: var(--space-7);
    flex-direction: column;
    gap: var(--space-5);
    align-items: flex-start;
  }

  .hero h1 {
    font-size: var(--text-3xl);
  }

  .hero-links {
    flex-wrap: wrap;
    gap: var(--space-3);
  }

  .hero-photo-wrap {
    width: clamp(170px, 52vw, 230px);
  }

  .quote-box {
    padding: var(--space-5);
    border-radius: 12px;
    margin-bottom: var(--space-8);
  }

  .quote-text {
    font-size: var(--text-base);
  }

  .timeline-container {
    padding-left: 60px;
  }

  .timeline-container::before {
    left: 20px;
  }

  .timeline-card::before {
    left: -35px;
  }

  .timeline-group-label {
    font-size: var(--text-xl);
    margin-bottom: var(--space-5);
  }

  .timeline-card {
    max-width: 100%;
    margin-bottom: var(--space-5);
    padding: var(--space-4);
  }
}