:root {
  --max-width: 820px;
  --muted: #555;
  /* slightly darker gray for readability */
  --text: #111;
  --bg: #fff;
  --primary: #0b5ed7;
  /* professional blue accent */
  --secondary: #6c757d;
  /* subtle gray for secondary text */
  --border: #e0e0e0;
  --gap: 1rem;
  font-size: 16px;
  line-height: 1.5;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans";
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--primary);
  text-decoration: underline;
  transition: color 0.2s ease;
}

a:hover {
  color: darken(var(--primary), 15%);
  text-decoration: none;
}

.container {
  max-width: var(--max-width);
  margin: 32px auto;
  padding: 0 20px;
}

.skip-link {
  position: absolute;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.skip-link:focus {
  clip: auto;
  clip-path: none;
  left: 10px;
  top: 10px;
  width: auto;
  height: auto;
  background: #000;
  color: #fff;
  padding: 6px 10px;
  z-index: 1000;
  border-radius: 4px;
}

.site-header {
  margin-bottom: 20px;
}

.name {
  margin: 0 0 4px 0;
  font-size: 1.9rem;
  letter-spacing: -0.02em;
  color: var(--primary);
}

.tagline {
  margin: 0;
  color: var(--secondary);
}

.contact {
  margin-top: 6px;
  font-size: 0.95rem;
  color: var(--secondary);
}

.contact a {
  color: var(--primary);
  text-decoration: none;
}

.hero {
  display: flex;
  gap: var(--gap);
  align-items: center;
  margin: 18px 0;
}

.avatar {
  width: 160px;
  height: 160px;
  object-fit: cover;
  border-radius: 8px;
  flex-shrink: 0;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 20px 0;
}

.timeline h2,
#education h2,
#patents h2,
#skills h2,
#publications h2 {
  margin: 0 0 12px 0;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
  color: var(--primary);
}

.entry {
  display: flex;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px dashed var(--border);
}

.entry:last-child {
  border-bottom: none;
}

.year {
  min-width: 110px;
  color: var(--secondary);
  font-weight: 600;
  font-size: 0.95rem;
}

.entry-body {
  flex: 1;
}

.entry-body h3 {
  margin: 0 0 6px 0;
  font-size: 1.05rem;
  color: var(--primary);
}

.role {
  margin: 0 0 8px 0;
  color: var(--secondary);
  font-size: 0.95rem;
}

.entry-gallery {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 12px;
}

.entry-gallery.side-by-side {
  gap: 20px;
  flex-wrap: wrap;
}

.entry-figure {
  flex: 0 0 260px;
  max-width: 260px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.entry-figure.small {
  flex: 0 0 180px;
  max-width: 180px;
}

.entry-image,
.entry-video {
  width: 100%;
  height: auto;
  border-radius: 8px;
  object-fit: cover;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  transition: transform 0.18s ease;
}

.entry-image:hover {
  transform: translateY(-4px) scale(1.02);
}

.entry-video {
  object-fit: contain;
}

.entry-figure figcaption {
  margin-top: 0.5rem;
  font-size: 0.9rem;
  color: var(--secondary);
}

/* education / patents / skills / publications */
.edu-list {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.edu-item {
  flex: 1 1 300px;
}

.site-footer {
  margin-top: 24px;
  color: var(--secondary);
  font-size: 0.95rem;
}

.sponsor-logos-inline {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-left: 8px;
}

.sponsor-logo-inline {
  height: 30px;
  width: auto;
  vertical-align: middle;
}

/* responsive tweaks */
@media (max-width: 720px) {
  .hero {
    flex-direction: column;
    align-items: flex-start;
  }

  .avatar {
    width: 120px;
    height: 120px;
  }

  .year {
    min-width: 84px;
    font-size: 0.9rem;
  }

  .entry-figure {
    flex: 1 1 48%;
    max-width: none;
  }

  .entry-figure.small {
    flex: 1 1 44%;
  }
}

@media (max-width: 420px) {
  .container {
    padding: 0 12px;
  }

  .entry {
    flex-direction: column;
    gap: 10px;
  }

  .year {
    min-width: auto;
  }

  .entry-figure {
    flex: 1 1 100%;
  }
}