/* ============================================================
   ACADEMIC THEME — Prof. Giovanni Stilo
   Modern, light, sharp design — appeals to young researchers
   and established professors alike.
   ============================================================ */

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  /* Palette: warm light background, cool indigo accent */
  --color-primary: #1e2a3a;
  --color-primary-soft: #334155;
  --color-accent: #4f46e5;
  --color-accent-hover: #4338ca;
  --color-accent-subtle: #eef2ff;
  --color-accent-border: #c7d2fe;
  --color-bg: #fafbfd;
  --color-surface: #ffffff;
  --color-surface-warm: #f8f9fc;
  --color-text: #1e293b;
  --color-text-secondary: #475569;
  --color-text-muted: #94a3b8;
  --color-border: #e8ecf2;
  --color-border-light: #f1f4f9;
  --color-tag-blue-bg: #eef2ff;
  --color-tag-blue: #4338ca;
  --color-tag-rose-bg: #fff1f2;
  --color-tag-rose: #be123c;
  --color-tag-amber-bg: #fffbeb;
  --color-tag-amber: #b45309;
  --color-tag-green-bg: #f0fdf4;
  --color-tag-green: #15803d;
  --shadow-xs: 0 1px 2px rgba(0,0,0,0.03);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.02);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.05);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.07);
  --shadow-card: 0 1px 3px rgba(0,0,0,0.03);
  --shadow-card-hover: 0 8px 30px rgba(0,0,0,0.06);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --max-width: 1120px;
  --transition: 0.22s cubic-bezier(.4,0,.2,1);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--color-accent-hover); }

img { max-width: 100%; height: auto; }

h1, h2, h3, h4 {
  font-family: var(--font);
  color: var(--color-primary);
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -0.025em;
}

h1 { font-size: 2.5rem; margin-bottom: 1rem; }
h2 { font-size: 1.65rem; margin-bottom: 0.75rem; }
h3 { font-size: 1.15rem; margin-bottom: 0.5rem; }
h4 { font-size: 1rem; margin-bottom: 0.4rem; }

p { margin-bottom: 1rem; }

/* --- Utility --- */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); border: 0;
}

/* === HEADER === */
.site-header {
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.site-logo { text-decoration: none; display: flex; align-items: center; gap: 0.5rem; }
.logo-text {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.03em;
}
.site-logo:hover .logo-text { color: var(--color-accent); }
.logo-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--color-accent);
  display: inline-block;
}

.nav-list {
  list-style: none;
  display: flex;
  gap: 0.15rem;
}

.nav-list a {
  color: var(--color-text-secondary);
  padding: 0.4rem 0.7rem;
  border-radius: var(--radius-sm);
  font-size: 0.84rem;
  font-weight: 500;
  transition: all var(--transition);
  letter-spacing: -0.01em;
}

.nav-list a:hover {
  color: var(--color-accent);
  background: var(--color-accent-subtle);
}
.nav-list a.active {
  color: var(--color-accent);
  background: var(--color-accent-subtle);
  font-weight: 600;
}

.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 0.5rem; }
.hamburger, .hamburger::before, .hamburger::after {
  display: block; width: 20px; height: 2px;
  background: var(--color-primary);
  transition: all var(--transition);
  position: relative; border-radius: 2px;
}
.hamburger::before, .hamburger::after { content: ''; position: absolute; left: 0; }
.hamburger::before { top: -6px; }
.hamburger::after { top: 6px; }

/* === HERO === */
.hero {
  background: var(--color-surface);
  padding: 5rem 0 4rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(79,70,229,0.04) 0%, transparent 70%);
  pointer-events: none;
}

.hero-inner {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 3rem;
  align-items: center;
}

.hero-photo-wrapper {
  position: relative;
}

.hero-photo {
  width: 170px;
  height: 170px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--color-surface);
  box-shadow: 0 0 0 1px var(--color-border), var(--shadow-lg);
  position: relative;
  z-index: 1;
}

.hero-content h1 {
  color: var(--color-primary);
  font-size: 2.8rem;
  margin-bottom: 0.2rem;
  letter-spacing: -0.04em;
  font-weight: 800;
  line-height: 1.1;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.3rem;
  font-weight: 400;
}

.hero-affiliation {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}

.hero-affiliation strong { color: var(--color-text-secondary); font-weight: 600; }
.hero-affiliation a { color: var(--color-accent); }
.hero-affiliation a:hover { text-decoration: underline; }

.hero-links {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.hero-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 1rem;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.hero-links a:hover {
  color: var(--color-accent);
  border-color: var(--color-accent-border);
  background: var(--color-accent-subtle);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.hero-links a i { font-size: 0.85rem; }

/* === HIGHLIGHT BANNER === */
.highlight-banner {
  background: var(--color-accent-subtle);
  color: var(--color-accent);
  text-align: center;
  padding: 0.65rem 1rem;
  font-size: 0.84rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  border-bottom: 1px solid var(--color-accent-border);
}

.highlight-banner strong { font-weight: 700; color: var(--color-primary); }
.highlight-banner i { margin-right: 0.4rem; }

/* === SECTION === */
.section {
  padding: 4.5rem 0;
}

.section-title {
  position: relative;
  padding-bottom: 0.7rem;
  margin-bottom: 2rem;
  letter-spacing: -0.03em;
  font-size: 1.65rem;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 28px;
  height: 3px;
  background: var(--color-accent);
  border-radius: 2px;
}

.section-title.centered { text-align: center; }
.section-title.centered::after { left: 50%; transform: translateX(-50%); }

.section-alt {
  background: var(--color-surface-warm);
  border-top: 1px solid var(--color-border-light);
  border-bottom: 1px solid var(--color-border-light);
}

/* === RESEARCH AREAS === */
.research-areas {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.research-area {
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 1.75rem 1.25rem 1.5rem;
  text-align: center;
  border: 1px solid var(--color-border);
  transition: all var(--transition);
  position: relative;
}

.research-area:hover {
  border-color: var(--color-accent-border);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.research-area-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.85rem;
  font-size: 1.1rem;
  background: var(--color-accent-subtle);
  color: var(--color-accent);
}

.research-area h3 {
  font-size: 0.92rem;
  margin-bottom: 0.35rem;
  font-weight: 600;
  color: var(--color-primary);
}

.research-area p {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 0;
  line-height: 1.5;
}

/* === STATS BAR === */
.stats-section {
  padding: 3rem 0;
}

.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.stat-item {
  text-align: center;
  padding: 1.5rem 1rem;
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.stat-item:hover {
  border-color: var(--color-accent-border);
  box-shadow: var(--shadow-sm);
}

.stat-number {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--color-accent);
  letter-spacing: -0.04em;
  line-height: 1.1;
}

.stat-label {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: 0.35rem;
  font-weight: 500;
}

/* === CARDS === */
.card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.card {
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: all var(--transition);
  border: 1px solid var(--color-border);
  position: relative;
  display: flex;
  flex-direction: column;
}

.card:hover {
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-accent-border);
  transform: translateY(-2px);
}

.card-tag {
  display: inline-block;
  padding: 0.18rem 0.55rem;
  border-radius: 6px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.65rem;
  width: fit-content;
}

.card-tag.xai { background: var(--color-tag-blue-bg); color: var(--color-tag-blue); }
.card-tag.fairness { background: var(--color-tag-amber-bg); color: var(--color-tag-amber); }
.card-tag.unlearning { background: var(--color-tag-rose-bg); color: var(--color-tag-rose); }
.card-tag.infrastructure { background: var(--color-tag-green-bg); color: var(--color-tag-green); }
.card-tag.general { background: var(--color-surface-warm); color: var(--color-text-secondary); }

.card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.4rem;
  font-weight: 700;
}

.card p {
  font-size: 0.87rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  flex: 1;
}

.card-link {
  font-size: 0.84rem;
  font-weight: 600;
  margin-top: 0.85rem;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  color: var(--color-accent);
  transition: gap var(--transition);
}
.card-link:hover { gap: 0.55rem; }

/* === NEWS === */
.news-list { list-style: none; }

.news-item {
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-border-light);
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 1.25rem;
  align-items: start;
}

.news-item:last-child { border-bottom: none; }

.news-date {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  font-weight: 500;
  padding-top: 0.15rem;
  font-variant-numeric: tabular-nums;
}

.news-item h3 {
  font-size: 0.93rem;
  font-weight: 600;
  margin-bottom: 0.15rem;
}

.news-item h3 a {
  color: var(--color-primary);
  transition: color var(--transition);
}
.news-item h3 a:hover { color: var(--color-accent); }

.news-item p {
  font-size: 0.84rem;
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

/* === EVENTS === */
.events-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

.event-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.event-card:hover {
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-accent-border);
  transform: translateY(-2px);
}

.event-card-img {
  height: 150px;
  background: var(--color-surface-warm);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-bottom: 1px solid var(--color-border-light);
}

.event-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.event-card-body {
  padding: 1.15rem 1.25rem;
}

.event-card-body h3 {
  font-size: 0.95rem;
  margin-bottom: 0.3rem;
  font-weight: 600;
}
.event-card-body p { font-size: 0.82rem; color: var(--color-text-secondary); margin-bottom: 0; }
.event-meta { font-size: 0.78rem; color: var(--color-accent); font-weight: 600; margin-bottom: 0.25rem; }

/* === PEOPLE === */
.people-section { margin-bottom: 2.75rem; }
.people-section h3 {
  font-size: 1.1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-border);
  margin-bottom: 1.25rem;
  font-weight: 700;
}

.people-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.person-card {
  display: flex;
  gap: 0.9rem;
  padding: 1.1rem;
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  align-items: center;
  transition: all var(--transition);
}

.person-card:hover {
  border-color: var(--color-accent-border);
  box-shadow: var(--shadow-sm);
}

.person-photo {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.person-info h4 {
  font-size: 0.9rem;
  margin-bottom: 0.1rem;
}

.person-info p {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

.people-list {
  list-style: none;
  columns: 2;
  column-gap: 2rem;
}

.people-list li {
  padding: 0.45rem 0;
  font-size: 0.87rem;
  break-inside: avoid;
}

.people-list .person-year {
  color: var(--color-text-muted);
  font-size: 0.8rem;
}

/* Avatars */
.avatar {
  width: 48px; height: 48px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 1rem;
  color: #fff; flex-shrink: 0;
  letter-spacing: -0.02em;
}

.avatar-indigo { background: #6366f1; }
.avatar-violet { background: #8b5cf6; }
.avatar-rose { background: #f43f5e; }
.avatar-amber { background: #f59e0b; }
.avatar-emerald { background: #10b981; }
.avatar-cyan { background: #06b6d4; }
.avatar-blue { background: #3b82f6; }
.avatar-fuchsia { background: #d946ef; }
.avatar-slate { background: #64748b; }
.avatar-teal { background: #14b8a6; }

.person-badge {
  display: inline-block;
  padding: 0.12rem 0.45rem;
  border-radius: 6px;
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-top: 0.25rem;
}

.badge-phd { background: var(--color-tag-blue-bg); color: var(--color-tag-blue); }
.badge-postdoc { background: var(--color-tag-green-bg); color: var(--color-tag-green); }
.badge-alumni { background: var(--color-surface-warm); color: var(--color-text-secondary); }

/* === PUBLICATIONS === */
.pub-nav {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border);
}

.pub-nav a {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.45rem 1rem;
  border-radius: 999px;
  font-size: 0.84rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.pub-nav a:hover,
.pub-nav a.active {
  background: var(--color-accent-subtle);
  color: var(--color-accent);
  border-color: var(--color-accent-border);
}

.pub-year { margin-bottom: 2.25rem; }
.pub-year h3 {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--color-accent);
  padding-bottom: 0.35rem;
  border-bottom: 2px solid var(--color-accent);
  margin-bottom: 0.8rem;
  display: inline-block;
}

.pub-entry {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--color-border-light);
  font-size: 0.87rem;
  line-height: 1.65;
}

.pub-entry:last-child { border-bottom: none; }
.pub-title { font-weight: 600; color: var(--color-primary); }
.pub-authors { color: var(--color-text-secondary); }
.pub-venue { font-style: italic; color: var(--color-text-secondary); }
.pub-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
  margin-right: 0.8rem;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-accent);
}
.pub-links a:hover { color: var(--color-accent-hover); }

/* === CTA / VIEW ALL === */
.view-all {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 1.75rem;
  padding: 0.55rem 1.25rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.84rem;
  color: var(--color-accent);
  border: 1px solid var(--color-accent-border);
  background: var(--color-accent-subtle);
  transition: all var(--transition);
}

.view-all:hover {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
  box-shadow: var(--shadow-sm);
}

/* === PAGE CONTENT (inner pages) === */
.page-content {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 3rem;
  margin: 2.5rem 0;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-xs);
}

.page-title {
  margin-bottom: 1.75rem;
  padding-bottom: 0.85rem;
  border-bottom: 2px solid var(--color-border);
  font-size: 1.85rem;
}

.page-subtitle {
  color: var(--color-text-secondary);
  font-size: 1rem;
  font-weight: 400;
  margin-top: 0.3rem;
}

/* Post / Blog */
.post-content { max-width: 780px; margin: 2rem auto; }
.post-header { margin-bottom: 2rem; }
.post-date { color: var(--color-text-muted); font-size: 0.87rem; }

.project-image, .event-image {
  margin: 1.75rem 0;
  text-align: center;
}

.project-image img, .event-image img {
  max-height: 280px;
  border-radius: var(--radius);
}

/* === TEACHING === */
.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1rem;
}

.course-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 1.5rem;
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.course-card:hover {
  border-color: var(--color-accent-border);
  box-shadow: var(--shadow-sm);
}

.course-card h4 {
  font-size: 0.95rem;
  margin-bottom: 0.3rem;
  font-weight: 600;
}

.course-card p {
  font-size: 0.84rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.25rem;
}

.course-tag {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 6px;
  font-size: 0.7rem;
  font-weight: 600;
  background: var(--color-accent-subtle);
  color: var(--color-accent);
  margin-top: 0.4rem;
}

/* === TIMELINE (Service page) === */
.timeline-item {
  position: relative;
  padding-left: 1.75rem;
  padding-bottom: 1.25rem;
  border-left: 2px solid var(--color-border);
}

.timeline-item:last-child { border-left-color: transparent; padding-bottom: 0; }

.timeline-item::before {
  content: '';
  position: absolute;
  left: -5px;
  top: 0.4rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-subtle);
}

.timeline-year {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 0.15rem;
}

.timeline-title {
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--color-primary);
}

.timeline-detail {
  font-size: 0.82rem;
  color: var(--color-text-secondary);
}

/* === SECTION ICONS === */
.section-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  margin-bottom: 0.6rem;
  font-size: 1rem;
}

.section-icon.indigo { background: var(--color-accent-subtle); color: var(--color-accent); }
.section-icon.emerald { background: var(--color-tag-green-bg); color: #059669; }
.section-icon.amber { background: var(--color-tag-amber-bg); color: #d97706; }
.section-icon.rose { background: var(--color-tag-rose-bg); color: #e11d48; }
.section-icon.violet { background: #f5f3ff; color: #7c3aed; }

/* === TABLES === */
table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5rem;
  font-size: 0.88rem;
}

table th, table td {
  padding: 0.65rem 0.85rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border-light);
}

table th {
  font-weight: 600;
  color: var(--color-text-muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background: var(--color-surface-warm);
  border-bottom: 2px solid var(--color-border);
}

table td { vertical-align: top; }

table tr:hover td {
  background: var(--color-surface-warm);
}

/* === ALL-NEWS PAGE === */
.all-news .news-item {
  grid-template-columns: 100px 1fr;
}

/* === ABOUT PAGE === */
.about-header {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 2rem;
  align-items: center;
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--color-border);
}

.about-header img {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--color-surface);
  box-shadow: var(--shadow-md), 0 0 0 1px var(--color-border);
}

.about-content h2 {
  margin-top: 2.5rem;
}

.about-content h2:first-child {
  margin-top: 0;
}

/* === FOOTER === */
.site-footer {
  background: var(--color-surface);
  color: var(--color-text-secondary);
  padding: 3rem 0 1.75rem;
  margin-top: 0;
  border-top: 1px solid var(--color-border);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--color-border-light);
}

.footer-col h3 {
  color: var(--color-primary);
  font-size: 0.88rem;
  margin-bottom: 0.85rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.footer-col p {
  font-size: 0.84rem;
  margin-bottom: 0.25rem;
  color: var(--color-text-secondary);
}

.footer-col ul { list-style: none; }
.footer-col ul li { padding: 0.2rem 0; }
.footer-col ul a {
  color: var(--color-text-secondary);
  font-size: 0.84rem;
  transition: color var(--transition);
}
.footer-col ul a:hover { color: var(--color-accent); }

.social-links a {
  display: block;
  padding: 0.25rem 0;
  color: var(--color-text-secondary);
  font-size: 0.84rem;
  transition: color var(--transition);
}
.social-links a:hover { color: var(--color-accent); }
.social-links i { width: 18px; margin-right: 0.35rem; }

.footer-bottom {
  text-align: center;
  padding-top: 1.5rem;
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
  .container { padding: 0 1.25rem; }

  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 1.5rem;
  }

  .hero-photo {
    width: 130px;
    height: 130px;
    margin: 0 auto;
  }

  .hero-links { justify-content: center; }
  .hero-content h1 { font-size: 2rem; }
  .hero { padding: 3rem 0 2.5rem; }

  .nav-toggle { display: block; }

  .site-nav {
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(12px);
    padding: 0.5rem 1.25rem 1.25rem;
    display: none;
    box-shadow: var(--shadow-lg);
    border-top: 1px solid var(--color-border);
  }

  .site-nav.is-open { display: block; }

  .nav-list {
    flex-direction: column;
    gap: 0;
  }

  .nav-list a {
    display: block;
    padding: 0.6rem 0.85rem;
    border-radius: var(--radius-sm);
  }

  .stats-bar { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; gap: 1.75rem; }
  .card-grid { grid-template-columns: 1fr; }
  .events-grid { grid-template-columns: 1fr; }
  .research-areas { grid-template-columns: repeat(2, 1fr); }
  .people-list { columns: 1; }
  .people-grid { grid-template-columns: 1fr; }

  .page-content { padding: 1.75rem; border-radius: var(--radius); }
  .about-header { grid-template-columns: 1fr; text-align: center; }
  .about-header img { margin: 0 auto; }

  .section { padding: 3rem 0; }
  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.35rem; }

  .news-item { grid-template-columns: 75px 1fr; gap: 0.75rem; }
}

@media (max-width: 480px) {
  .hero { padding: 2rem 0 1.75rem; }
  .hero-content h1 { font-size: 1.75rem; }
  .stats-bar { grid-template-columns: 1fr 1fr; gap: 0.5rem; }
  .stat-item { padding: 1rem 0.5rem; }
  .stat-number { font-size: 1.7rem; }
  .research-areas { grid-template-columns: 1fr; }
  .section { padding: 2.5rem 0; }
}

/* === SMOOTH ANIMATIONS === */
@media (prefers-reduced-motion: no-preference) {
  .card, .research-area, .event-card, .stat-item, .person-card, .course-card {
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  }
}