/* Landing Page Styles — Hero slideshow + immersive scroll sections */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.hero-slideshow { position: absolute; inset: 0; z-index: 0; }
.hero-slide {
  position: absolute; inset: 0;
  opacity: 0;
  transition: opacity 1.5s ease-in-out;
  will-change: opacity;
}
.hero-slide.active { opacity: 1; }
.hero-slide img { width: 100%; height: 100%; object-fit: cover; }
.hero-overlay {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse at center, rgba(8,9,12,0.3) 0%, rgba(8,9,12,0.75) 70%, rgba(8,9,12,0.95) 100%),
    linear-gradient(180deg, transparent 60%, var(--bg-primary) 100%);
  z-index: 1;
}
[data-theme="light"] .hero-overlay {
  background:
    radial-gradient(ellipse at center, rgba(250,250,249,0.2) 0%, rgba(250,250,249,0.6) 70%, rgba(250,250,249,0.9) 100%),
    linear-gradient(180deg, transparent 60%, var(--bg-primary) 100%);
}
.hero-content {
  position: relative; z-index: 2;
  text-align: center;
  max-width: 800px;
  padding: var(--space-xl);
}
.hero-content h1 {
  font-family: var(--font-display); font-weight: 600;
  font-size: clamp(2.8rem, 6vw, 5rem);
  margin-bottom: var(--space-md);
  color: #fff;
  text-shadow: 0 2px 20px rgba(0,0,0,0.5);
}
[data-theme="light"] .hero-content h1 { color: var(--text-primary); text-shadow: none; }
.hero-subtitle {
  font-family: var(--font-body);
  font-size: clamp(1rem, 2vw, 1.2rem); font-weight: 300;
  color: rgba(255,255,255,0.8);
  margin-bottom: var(--space-lg);
  letter-spacing: 0.04em;
}
[data-theme="light"] .hero-subtitle { color: var(--text-secondary); }
.hero-role {
  font-family: var(--font-mono); font-size: 0.8rem;
  color: var(--accent-light);
  letter-spacing: 0.15em; text-transform: uppercase;
  margin-bottom: var(--space-xl);
}
.hero-icons {
  display: flex; align-items: center; justify-content: center;
  gap: var(--space-md); margin-bottom: var(--space-2xl); flex-wrap: wrap;
}
.hero-icons .icon-link {
  border-color: rgba(255,255,255,0.2);
  color: rgba(255,255,255,0.7);
  background: rgba(255,255,255,0.05);
  backdrop-filter: blur(8px);
}
[data-theme="light"] .hero-icons .icon-link {
  border-color: var(--border); color: var(--text-secondary); background: rgba(255,255,255,0.6);
}
.hero-icons .icon-link:hover {
  color: var(--accent); border-color: var(--accent); background: var(--accent-glow);
}
.hero-icons .icon-link--cv {
  width: auto; border-radius: var(--border-radius);
  padding: 0 var(--space-md); gap: var(--space-sm);
  font-family: var(--font-mono); font-size: 0.75rem; font-weight: 500;
  letter-spacing: 0.06em; text-transform: uppercase;
  border-color: var(--accent); color: var(--accent-light);
  background: rgba(0, 168, 120, 0.1);
}
.hero-icons .icon-link--cv:hover { background: var(--accent); color: #fff; }
.hero-scroll-indicator {
  position: absolute; bottom: 40px; left: 50%;
  transform: translateX(-50%); z-index: 2;
  display: flex; flex-direction: column; align-items: center;
  gap: var(--space-sm); color: rgba(255,255,255,0.5);
  font-size: 0.7rem; font-family: var(--font-mono);
  letter-spacing: 0.1em; text-transform: uppercase;
  animation: hero-bounce 2s infinite; cursor: pointer;
}
[data-theme="light"] .hero-scroll-indicator { color: var(--text-tertiary); }
@keyframes hero-bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}
.hero-scroll-indicator svg { width: 20px; height: 20px; }
.hero-image-credit {
  position: absolute; bottom: 12px; right: 16px; z-index: 2;
  font-size: 0.65rem; color: rgba(255,255,255,0.4);
}
.hero-image-credit a { color: rgba(255,255,255,0.55); text-decoration: underline; }
[data-theme="light"] .hero-image-credit { color: var(--text-tertiary); }
[data-theme="light"] .hero-image-credit a { color: var(--text-secondary); }

/* Immersive Scroll Sections */
.scroll-sections { position: relative; z-index: 1; }
.scroll-section {
  min-height: 100vh; display: flex; align-items: center;
  position: relative; overflow: hidden;
}
.scroll-section-inner {
  position: relative; z-index: 1;
  display: flex; align-items: center; gap: var(--space-4xl);
  width: 100%; max-width: var(--max-width);
  margin: 0 auto; padding: var(--space-3xl) var(--space-xl);
}
.scroll-section-text { flex: 1; }
.scroll-section-text h2 { margin-bottom: var(--space-lg); }
.scroll-section-text p { color: var(--text-secondary); font-size: 1.05rem; }
.scroll-section-media {
  flex: 1; max-width: 500px;
  border-radius: var(--border-radius-lg); overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.scroll-section-media img { width: 100%; height: auto; display: block; }
.scroll-section--research { background: linear-gradient(135deg, #08090c 0%, #0a1628 50%, #08090c 100%); }
.scroll-section--publications { background: linear-gradient(135deg, #08090c 0%, #0c1a14 50%, #08090c 100%); }
.scroll-section--blog { background: linear-gradient(135deg, #08090c 0%, #1a0f22 50%, #08090c 100%); }
.scroll-section--art { background: linear-gradient(135deg, #08090c 0%, #1a1510 50%, #08090c 100%); }
[data-theme="light"] .scroll-section--research { background: linear-gradient(135deg, #fafaf9 0%, #eff6ff 50%, #fafaf9 100%); }
[data-theme="light"] .scroll-section--publications { background: linear-gradient(135deg, #fafaf9 0%, #ecfdf5 50%, #fafaf9 100%); }
[data-theme="light"] .scroll-section--blog { background: linear-gradient(135deg, #fafaf9 0%, #faf5ff 50%, #fafaf9 100%); }
[data-theme="light"] .scroll-section--art { background: linear-gradient(135deg, #fafaf9 0%, #fef9ee 50%, #fafaf9 100%); }
.scroll-section-text, .scroll-section-media {
  opacity: 0; transform: translateY(40px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}
.scroll-section.in-view .scroll-section-text { opacity: 1; transform: translateY(0); }
.scroll-section.in-view .scroll-section-media { opacity: 1; transform: translateY(0); transition-delay: 0.2s; }

/* Ruled section label (lines on both sides) */
.section-label--ruled { justify-content: center; }
.section-label--ruled::before { flex: 1; width: auto; }
.section-label--ruled::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--accent);
}

/* NASA Image of the Day */
.nasa-daily { position: relative; padding: var(--space-4xl) 0 var(--space-2xl); text-align: center; }
.nasa-daily-image {
  max-width: 900px; margin: var(--space-xl) auto 0;
  border-radius: var(--border-radius-lg); overflow: hidden;
  box-shadow: var(--shadow-lg), 0 0 60px rgba(0, 168, 120, 0.05);
  border: 1px solid var(--border);
}
.nasa-daily-image > a { display: block; line-height: 0; }
.nasa-daily-image img { width: 100%; height: auto; display: block; }
.nasa-daily-caption { max-width: 700px; margin: var(--space-lg) auto 0; color: var(--text-secondary); font-size: 0.95rem; line-height: 1.7; text-align: justify; text-justify: inter-word; }
.nasa-daily-credit { font-size: 0.8rem; color: var(--text-tertiary); margin-top: var(--space-lg); margin-bottom: var(--space-2xl); text-align: center; }
.nasa-daily-credit a { color: var(--text-secondary); }
/* Allow image credit bar to flow below (not overlap) credited scroll-section images */
.scroll-section-media.credited-image { overflow: visible; }

/* Featured Publication */
.featured-pub {
  padding: var(--space-4xl) 0 var(--space-4xl);
}
.featured-pub .section-label--ruled { margin-bottom: 0; }
.featured-pub-card {
  max-width: 900px;
  margin: var(--space-4xl) auto 0;
  border: 1px solid var(--border-accent);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  background: var(--bg-card);
  box-shadow: var(--shadow-lg), 0 0 60px rgba(0, 168, 120, 0.05);
}
.featured-pub-figure {
  border-bottom: 1px solid var(--border);
  background: #050507;
  line-height: 0;
}
.featured-pub-figure a { display: block; }
.featured-pub-figure img {
  width: 100%; height: auto; display: block;
  max-height: 420px; object-fit: contain;
  transition: opacity 0.2s;
}
.featured-pub-figure img:hover { opacity: 0.88; }
.featured-pub-meta { padding: var(--space-2xl); }
.featured-pub-title {
  font-family: var(--font-display);
  font-size: 1.2rem; font-weight: 500; line-height: 1.45;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
  text-align: justify; text-justify: inter-word;
}
.featured-pub-authors {
  font-size: 0.9rem; color: var(--accent-light);
  margin-bottom: var(--space-xs);
}
.featured-pub-journal {
  font-family: var(--font-mono); font-size: 0.82rem;
  color: var(--text-tertiary);
  margin-bottom: var(--space-lg);
}
.featured-pub-journal a { color: var(--accent); text-decoration: none; }
.featured-pub-journal a:hover { text-decoration: underline; }
.featured-pub-abstract {
  border-top: 1px solid var(--border);
  padding-top: var(--space-lg);
}
.featured-pub-abstract p {
  font-size: 0.95rem; color: var(--text-secondary);
  line-height: 1.8; margin-bottom: 0;
}
[data-theme="light"] .featured-pub-card { background: var(--bg-card); border-color: var(--border-accent); }
[data-theme="light"] .featured-pub-figure { background: #f5f5f5; }