@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600&family=IBM+Plex+Sans:wght@300;400;500;600&family=Space+Grotesk:wght@300;400;500;600;700&display=swap');

:root {
  --max-width: 920px;
  --spacing-page: 6rem 2rem;
  --radius-tech: 2px;
  
  --font-sans: 'IBM Plex Sans', system-ui, -apple-system, sans-serif;
  --font-heading: 'Space Grotesk', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  --bg-core: #fcfcfc;
  --bg-panel: #ffffff;
  --bg-subtle: #f4f4f5;
  --bg-grid: radial-gradient(#e4e4e7 1px, transparent 1px);
  
  --text-main: #18181b;
  --text-secondary: #52525b;
  --text-muted: #a1a1aa;
  
  --border-main: #e4e4e7;
  --border-focus: #27272a;
  
  --accent-primary: #18181b;
  --accent-link: #0f172a;
  --accent-link-hover: #2563eb;
  --accent-glow: rgba(37, 99, 235, 0.05);
}

[data-theme="dark"] {
  --bg-core: #050505;
  --bg-panel: #0a0a0a;
  --bg-subtle: #121212;
  --bg-grid: radial-gradient(#27272a 1px, transparent 1px);
  
  --text-main: #e4e4e7;
  --text-secondary: #a1a1aa;
  --text-muted: #52525b;
  
  --border-main: #27272a;
  --border-focus: #52525b;
  
  --accent-primary: #ffffff;
  --accent-link: #e4e4e7;
  --accent-link-hover: #2dd4bf;
  --accent-glow: rgba(45, 212, 191, 0.1);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-sans);
  background-color: var(--bg-core);
  background-image: var(--bg-grid);
  background-size: 24px 24px;
  color: var(--text-main);
  line-height: 1.7;
  font-weight: 300;
  transition: background 0.3s ease, color 0.3s ease;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--text-main);
  margin: 0 0 1rem 0;
  font-weight: 600;
  letter-spacing: -0.02em;
}

p { margin: 0 0 1rem 0; }

a {
  color: var(--accent-link);
  text-decoration: none;
  border-bottom: 1px solid rgba(128, 128, 128, 0.3);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}
a:hover {
  color: var(--accent-link-hover);
  border-color: var(--accent-link-hover);
  text-shadow: 0 0 8px var(--accent-glow);
}

img, video {
  max-width: 100%;
  display: block;
  border-radius: var(--radius-tech);
}

ul { margin: 0; padding: 0; list-style: none; }

.page-shell {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-page);
  position: relative;
}

.card {
  background: var(--bg-panel);
  border: 1px solid var(--border-main);
  border-radius: var(--radius-tech);
  padding: 24px;
}

.section { 
  margin-bottom: 96px; 
  position: relative;
}

.section::before {
  content: '';
  position: absolute;
  left: -24px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--border-main);
  opacity: 0.5;
  display: none;
}

@media (min-width: 1024px) { .section::before { display: block; } }

.hero {
  background: transparent;
  padding: 0;
  display: grid;
  grid-template-columns: 1.8fr 1fr;
  gap: 80px;
  align-items: start;
  margin-bottom: 120px;
  padding-bottom: 0;
  border: none;
}

.hero-title {
  font-size: 4rem;
  line-height: 0.95;
  margin-bottom: 32px;
  font-weight: 700;
  letter-spacing: -0.04em;
}

.hero-text p {
  color: var(--text-secondary);
  font-size: 1.15rem;
  max-width: 95%;
  margin-bottom: 24px;
  font-weight: 300;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 40px 0;
}

.hero-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  padding: 6px 12px;
  border: 1px solid var(--border-main);
  color: var(--text-secondary);
  border-radius: 999px;
  background: var(--bg-panel);
  letter-spacing: 0.05em;
  transition: all 0.2s ease;
}
.hero-tag:hover {
  border-color: var(--accent-link-hover);
  color: var(--accent-link-hover);
  transform: translateY(-1px);
}

.hero-glance {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  margin-bottom: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--border-main);
}

.glance-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 8px;
  letter-spacing: 0.1em;
}
.glance-value {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-main);
}

.contact-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
  padding: 0;
  border: none;
  background: transparent;
}
.contact-link i { font-size: 1rem; }
.contact-link span { text-decoration: underline; text-decoration-color: var(--border-main); text-underline-offset: 4px; }
.contact-link:hover { color: var(--accent-link-hover); }
.contact-link:hover span { text-decoration-color: var(--accent-link-hover); }

.hero-media {
  margin: 0;
  aspect-ratio: 0.9;
  border-radius: var(--radius-tech);
  border: 1px solid var(--border-main);
  background: var(--bg-subtle);
  position: relative;
  max-width: 360px;
  justify-self: end;
  overflow: hidden;
}
.hero-media img {
  width: 100%; height: 100%; object-fit: cover;
  filter: grayscale(100%) contrast(1.1);
  transition: filter 0.5s ease, transform 0.5s ease;
}
.hero-media:hover img { 
  filter: grayscale(0%) contrast(1);
  transform: scale(1.02);
}

.hero-media::after {
  content: '';
  position: absolute;
  inset: 12px;
  border: 1px solid rgba(255,255,255,0.1);
  pointer-events: none;
  z-index: 10;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 48px;
  border-bottom: 1px solid var(--border-main);
  padding-bottom: 16px;
  position: relative;
}
.section-header h2 {
  font-size: 1.5rem;
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.section-header::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 48px;
  height: 2px;
  background: var(--text-main);
}

.section-subtitle {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}
.inline-highlight {
  color: var(--accent-link-hover);
  font-weight: 600;
}

[data-theme="dark"] .inline-highlight {
  color: var(--accent-link-hover);
}


.news-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-left: 1px solid var(--border-main);
}
.news-item {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 32px;
  align-items: baseline;
  padding: 16px 0 16px 24px;
  font-size: 1rem;
  position: relative;
  transition: background 0.2s ease;
}
.news-item::before {
  content: '';
  position: absolute;
  left: -3px;
  top: 24px;
  width: 5px;
  height: 5px;
  background: var(--border-main);
  border-radius: 50%;
  transition: background 0.2s;
}
.news-item:hover::before { background: var(--accent-link-hover); }

.news-date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: right;
  opacity: 0.8;
}
.news-date.is-new {
  color: var(--accent-link-hover);
  font-weight: 600;
  opacity: 1;
}
.news-item:hover .news-date { color: var(--text-main); }
.news-text { color: var(--text-secondary); margin: 0; }

.button-ghost {
  background: transparent;
  border: 1px solid var(--border-main);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 10px 20px;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 32px;
  margin-left: 24px;
  transition: all 0.2s ease;
}
.button-ghost:hover {
  border-color: var(--accent-link-hover);
  color: var(--accent-link-hover);
  background: var(--bg-subtle);
}

.item-grid {
  display: grid;
  gap: 48px;
}
.item-card {
  display: flex;
  gap: 40px;
  align-items: flex-start;
  padding: 24px;
  margin: -24px;
  border-radius: var(--radius-tech);
  border: 1px solid transparent;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  background: transparent;
}


.item-card.featured {
  position: relative;
}
.item-card.featured::before {
  content: '★ FEATURED';
  position: absolute;
  top: -10px;
  right: 0;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--accent-link-hover);
  opacity: 1;
  letter-spacing: 0.1em;
}



.item-card .media {
  flex: 0 0 260px;
  width: 260px;
  aspect-ratio: 1;
  border-radius: var(--radius-tech);
  border: 1px solid var(--border-main);
  background: var(--bg-subtle);
  overflow: hidden;
  position: relative;
  margin: 0;
}

.media-static, .media-hover {
  width: 100%; height: 100%; object-fit: cover;
  position: absolute; inset: 0;
}
.media-static { z-index: 1; }
.media-hover { opacity: 0; z-index: 2; transition: opacity 0.3s; will-change: opacity; }
.media:hover .media-hover { opacity: 1; }

.item-content { flex: 1; min-width: 0; }

.item-title {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 600;
  line-height: 1.25;
  margin-bottom: 12px;
  color: var(--text-main);
}

.item-authors {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
  line-height: 1.6;
}
.item-venue, .item-meta {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.item-venue strong { 
  color: var(--text-main); 
  font-weight: 500;
  background: var(--bg-subtle);
  padding: 2px 6px;
  border-radius: 2px;
}

.item-summary {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.6;
  max-width: 90%;
}

.item-links { display: flex; gap: 12px; flex-wrap: wrap; }
.item-link {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-secondary);
  border: 1px solid var(--border-main);
  padding: 6px 12px;
  border-radius: var(--radius-tech);
  display: flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  text-decoration: none;
}
.item-link:hover {
  border-color: var(--accent-link-hover);
  color: var(--accent-link-hover);
  background: var(--bg-subtle);
  box-shadow: 0 0 10px var(--accent-glow);
}


.collapse {
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--border-main);
}

.affiliation-logos {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  margin-top: 24px;
  align-items: center;
}
.affiliation-logos img {
  height: 32px;
  filter: grayscale(100%) opacity(0.5);
  transition: all 0.3s ease;
}
.affiliation-logos a:hover img {
  filter: grayscale(0%) opacity(1);
}

.misc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 48px;
}
.misc-block h3 {
  font-size: 0.85rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-main);
  padding-bottom: 12px;
  margin-bottom: 20px;
  letter-spacing: 0.1em;
}
.list-plain li {
  margin-bottom: 10px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
}
.list-plain li::before {
  content: '›';
  margin-right: 8px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.theme-toggle-container {
  position: fixed;
  top: 32px;
  right: 32px;
  z-index: 100;
}
.theme-toggle-btn {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--bg-panel);
  border: 1px solid var(--border-main);
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}
.theme-toggle-btn:hover {
  border-color: var(--accent-link-hover);
  color: var(--accent-link-hover);
  transform: rotate(15deg);
}
.theme-icon { position: absolute; font-size: 1.1rem; }
.sun-icon { transition: transform 0.5s cubic-bezier(0.4, 0.0, 0.2, 1), opacity 0.5s; }
.moon-icon { transition: transform 0.5s cubic-bezier(0.4, 0.0, 0.2, 1), opacity 0.5s; }
[data-theme="dark"] .sun-icon { opacity: 0; transform: rotate(-90deg) scale(0.5); }
[data-theme="dark"] .moon-icon { opacity: 1; transform: rotate(0) scale(1); }
html:not([data-theme="dark"]) .moon-icon { opacity: 0; transform: rotate(90deg) scale(0.5); }

.footer-card {
  background: transparent;
  border: none;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

.separator {
  margin: 0 0.5rem;
  color: var(--text-muted);
}

.site-footer {
  border-top: 1px solid var(--border-main);
  background: var(--bg-core);
  padding: 80px 0;
  margin-top: 0;
}
.visitor-map { margin-bottom: 40px; filter: grayscale(100%) opacity(0.5) invert(0); transition: filter 0.3s; }
[data-theme="dark"] .visitor-map { filter: grayscale(100%) opacity(0.5) invert(1); }
.visitor-map:hover { filter: none; }
.footer-bottom {
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

@media (max-width: 820px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .hero-media { order: -1; margin: 0; width: 100%; max-width: 280px; }
  .item-card { 
    flex-direction: column; 
    gap: 24px; 
    margin: 0;
    padding: 0; 
    align-items: stretch;
  }
  .item-card:hover { background: transparent; box-shadow: none; border-color: transparent; }
  .item-card .media {
    width: 100%;
    max-width: 500px;
    aspect-ratio: 16 / 9;
    flex: none;
    margin: 0 auto;
    align-self: center;
  }
}

@media (max-width: 640px) {
  :root { --spacing-page: 3rem 1.5rem; }
  .hero-title { font-size: 2.75rem; }
  .news-item { grid-template-columns: 1fr; gap: 8px; padding-left: 16px; }
  .news-item::before { top: 8px; }
  .news-date { text-align: left; }
}

[hidden] { display: none !important; }