/* Base / Variables matching index */
:root {
  --orange: rgba(240, 95, 51, 1);
  --bg-color: rgba(248, 248, 246, 1);
  --text-dark: #1a1a24;
  --text-muted: #5a5a66;
}

body {
  background-color: var(--bg-color);
  color: var(--text-dark);
  padding: 24px 40px;
  overflow: visible;
  font-family: 'Inter', sans-serif;
  line-height: 1.6;
}

/* Back Link */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--text-muted);
  font-weight: 500;
  font-size: 1.1rem;
  margin-bottom: 0;
  transition: color 0.2s;
}

.back-link:hover {
  color: var(--orange);
}

/* Sticky Top Bar (home button stays pinned) */
.page-topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg-color);
  padding: 14px 0;
  margin-bottom: 12px;
}

/* Main Container - single column stacked layout */
.about-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Shared Card Style */
.card {
  background: white;
  border-radius: 24px;
  padding: 20px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.02);
}

/* ===========================
   Band 1: Photo Mosaic (compact strip)
   =========================== */
.mosaic-band {
  background: white;
  border-radius: 20px;
  padding: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.02);
}

.photo-mosaic {
  display: grid;
  grid-template-columns: repeat(14, 1fr);
  gap: 6px;
  width: 100%;
}

.mosaic-img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 6px;
  opacity: 0;
  transform: scale(0.9);
  transition: transform 0.3s ease, box-shadow 0.3s ease, opacity 0.5s ease;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.mosaic-img:hover {
  transform: scale(1.08);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
  z-index: 10;
  position: relative;
}

/* ===========================
   Section 2: Identity / Name
   =========================== */
.identity-card {
  text-align: center;
}

.hero-name {
  font-family: 'Inter', sans-serif;
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 4px;
  line-height: 1.2;
}

.hero-title {
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.hero-affiliation {
  font-family: 'Inter', sans-serif;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.hero-contact {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.hero-contact a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}

.hero-contact a:hover {
  color: var(--orange);
}

.contact-divider {
  color: #d0d0d0;
  font-weight: 300;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-cv {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--orange);
  color: white;
  text-decoration: none;
  padding: 8px 16px;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 600;
  transition: transform 0.2s, box-shadow 0.2s, background-color 0.2s;
}

.btn-cv:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(240, 95, 51, 0.3);
  background-color: #e65228;
}

/* Social Icons */
.social-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  align-items: center;
}

.social-icon {
  color: #a0a0ab;
  transition: color 0.3s, transform 0.3s;
}

.social-icon:hover {
  color: var(--orange);
  transform: scale(1.15) translateY(-3px);
}

/* ===========================
   Section 3: Research Focus
   =========================== */
.section-title {
  font-family: 'Caveat', cursive;
  font-size: 2rem;
  color: var(--orange);
  margin-bottom: 12px;
}

/* ===========================
   Band 2: Middle Row (Hero + Research Focus)
   =========================== */
.middle-row {
  display: flex;
  gap: 16px;
  align-items: stretch;
}

.middle-row .identity-card {
  flex: 1;
  text-align: left;
}

.middle-row .hero-contact {
  justify-content: flex-start;
}

.middle-row .hero-actions {
  justify-content: flex-start;
}

.middle-row .lang-badges {
  justify-content: flex-start;
  margin-top: 12px;
}

/* Content Row for Side-by-Side */
.content-row {
  display: flex;
  gap: 16px;
  align-items: stretch;
}

.research-card {
  flex: 1.3;
  border-left: 6px solid var(--orange);
}

.focus-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.focus-list li {
  background: var(--bg-color);
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 500;
  border: 1px solid #e0e0e0;
}

/* ===========================
   Band 3: Background
   =========================== */
.bio-card {
  border-left: 6px solid var(--orange);
}

.bio-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px 32px;
}

.bio-card p {
  margin-bottom: 0;
}

/* ===========================
   Section 5: Languages
   =========================== */
.lang-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.badge {
  background: var(--bg-color);
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-dark);
  border: 1px solid #e0e0e0;
}

/* ===========================
   Scroll Animations
   =========================== */
.hidden-section {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.show-section {
  opacity: 1;
  transform: translateY(0);
}

/* ===========================
   Responsive
   =========================== */
@media (max-width: 768px) {
  body {
    padding: 16px;
  }

  .card {
    padding: 20px;
  }

  .photo-mosaic {
    grid-template-columns: repeat(7, 1fr);
  }

  .middle-row {
    flex-direction: column;
  }

  .content-row {
    flex-direction: column;
  }

  .bio-columns {
    grid-template-columns: 1fr;
  }

  .hero-contact {
    flex-direction: column;
    gap: 6px;
  }

  .contact-divider {
    display: none;
  }

  .hero-actions {
    flex-direction: column;
    gap: 16px;
  }
}