/* ===== VARIABLES ===== */
:root {
  --bg: #F8FAF8;
  --bg-card: #FFFFFF;
  --bg-alt: #EDF5EF;
  --primary: #1B4332;
  --primary-mid: #2D6A4F;
  --accent: #52B788;
  --accent-light: #B7E4C7;
  --accent-pale: #D8F3E3;
  --text: #1A2E21;
  --text-muted: #4E7260;
  --text-light: #8CA898;
  --border: #D0E8D8;
  --shadow-sm: 0 1px 8px rgba(27, 67, 50, 0.07);
  --shadow-md: 0 4px 24px rgba(27, 67, 50, 0.11);
  --shadow-lg: 0 12px 48px rgba(27, 67, 50, 0.16);
  --radius-sm: 8px;
  --radius-md: 14px;
  --nav-h: 64px;
  --font-display: 'Fraunces', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== THEMES ===== */
[data-theme="forest"] {
  --bg:#F8FAF8; --bg-card:#FFFFFF; --bg-alt:#EDF5EF;
  --primary:#1B4332; --primary-mid:#2D6A4F;
  --accent:#52B788; --accent-light:#B7E4C7; --accent-pale:#D8F3E3;
  --text:#1A2E21; --text-muted:#4E7260; --text-light:#8CA898;
  --border:#D0E8D8;
  --shadow-sm:0 1px 8px rgba(27,67,50,.07);
  --shadow-md:0 4px 24px rgba(27,67,50,.11);
  --shadow-lg:0 12px 48px rgba(27,67,50,.16);
}
[data-theme="slate"] {
  --bg:#FAFAF9; --bg-card:#FFFFFF; --bg-alt:#F1F5F9;
  --primary:#1E293B; --primary-mid:#334155;
  --accent:#3B82F6; --accent-light:#BFDBFE; --accent-pale:#EFF6FF;
  --text:#0F172A; --text-muted:#475569; --text-light:#94A3B8;
  --border:#E2E8F0;
  --shadow-sm:0 1px 8px rgba(15,23,42,.07);
  --shadow-md:0 4px 24px rgba(15,23,42,.11);
  --shadow-lg:0 12px 48px rgba(15,23,42,.16);
}
[data-theme="indigo"] {
  --bg:#FAFAFF; --bg-card:#FFFFFF; --bg-alt:#F0F0FF;
  --primary:#1E1B4B; --primary-mid:#3730A3;
  --accent:#6366F1; --accent-light:#C7D2FE; --accent-pale:#EEF2FF;
  --text:#1E1B4B; --text-muted:#4B5563; --text-light:#9CA3AF;
  --border:#E0E7FF;
  --shadow-sm:0 1px 8px rgba(30,27,75,.07);
  --shadow-md:0 4px 24px rgba(30,27,75,.11);
  --shadow-lg:0 12px 48px rgba(30,27,75,.16);
}
[data-theme="navy"] {
  --bg:#FAFBFF; --bg-card:#FFFFFF; --bg-alt:#F1F5F9;
  --primary:#0F172A; --primary-mid:#1E293B;
  --accent:#B45309; --accent-light:#FDE68A; --accent-pale:#FFFBEB;
  --text:#0F172A; --text-muted:#475569; --text-light:#94A3B8;
  --border:#E2E8F0;
  --shadow-sm:0 1px 8px rgba(15,23,42,.07);
  --shadow-md:0 4px 24px rgba(15,23,42,.11);
  --shadow-lg:0 12px 48px rgba(15,23,42,.16);
}
[data-theme="charcoal"] {
  --bg:#FDFCFB; --bg-card:#FFFFFF; --bg-alt:#F5F0EB;
  --primary:#1C1917; --primary-mid:#44403C;
  --accent:#C2410C; --accent-light:#FDBA74; --accent-pale:#FFF7ED;
  --text:#1C1917; --text-muted:#57534E; --text-light:#A8A29E;
  --border:#E7E5E4;
  --shadow-sm:0 1px 8px rgba(28,25,23,.07);
  --shadow-md:0 4px 24px rgba(28,25,23,.11);
  --shadow-lg:0 12px 48px rgba(28,25,23,.16);
}
[data-theme="teal"] {
  --bg:#F7FAFA; --bg-card:#FFFFFF; --bg-alt:#ECFCFC;
  --primary:#134E4A; --primary-mid:#0F766E;
  --accent:#0D9488; --accent-light:#99F6E4; --accent-pale:#F0FDFA;
  --text:#0D1F1E; --text-muted:#2D6A65; --text-light:#5EADA6;
  --border:#CCFBF1;
  --shadow-sm:0 1px 8px rgba(19,78,74,.07);
  --shadow-md:0 4px 24px rgba(19,78,74,.11);
  --shadow-lg:0 12px 48px rgba(19,78,74,.16);
}
[data-theme="umass"] {
  --bg:#FAFAFA; --bg-card:#FFFFFF; --bg-alt:#FFF5F5;
  --primary:#881C1C; --primary-mid:#A52020;
  --accent:#C41230; --accent-light:#FECACA; --accent-pale:#FFF5F5;
  --text:#1A0A0A; --text-muted:#6B3030; --text-light:#B07070;
  --border:#F0D5D5;
  --shadow-sm:0 1px 8px rgba(136,28,28,.07);
  --shadow-md:0 4px 24px rgba(136,28,28,.11);
  --shadow-lg:0 12px 48px rgba(136,28,28,.16);
}
[data-theme="maroon"] {
  --bg:#FDFAF8; --bg-card:#FFFFFF; --bg-alt:#F7EEEE;
  --primary:#6B1414; --primary-mid:#8C2020;
  --accent:#9B2335; --accent-light:#F5C6C6; --accent-pale:#FDF0F0;
  --text:#1A0A0A; --text-muted:#5C3030; --text-light:#A87878;
  --border:#E8D4D4;
  --shadow-sm:0 1px 8px rgba(107,20,20,.07);
  --shadow-md:0 4px 24px rgba(107,20,20,.11);
  --shadow-lg:0 12px 48px rgba(107,20,20,.16);
}

/* ===== THEME SWITCHER ===== */
#themeSwitcher {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 999;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 10px;
  pointer-events: none;
}
#themeToggle, #themePanel.open {
  pointer-events: auto;
}
#themeToggle {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-card);
  box-shadow: var(--shadow-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.45;
  transition: opacity 0.2s, box-shadow 0.2s;
  color: var(--text-muted);
}
#themeToggle:hover { opacity: 1; box-shadow: var(--shadow-lg); }
#themeToggle svg { width: 17px; height: 17px; }

#themePanel {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 10px;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px) scale(0.97);
  transform-origin: bottom right;
  transition: opacity 0.2s var(--ease), transform 0.2s var(--ease);
}
#themePanel.open {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0) scale(1);
}

.theme-swatch {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 10px;
  border-radius: 8px;
  border: none;
  background: transparent;
  cursor: pointer;
  transition: background 0.15s;
  white-space: nowrap;
}
.theme-swatch:hover { background: var(--bg-alt); }
.theme-swatch.active { background: var(--bg-alt); }

.swatch-dot {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  flex-shrink: 0;
  position: relative;
}
.theme-swatch.active .swatch-dot::after {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  border: 2px solid currentColor;
}
.swatch-label {
  font-size: 0.775rem;
  font-weight: 500;
  color: var(--text);
  font-family: var(--font-body);
}

/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* ===== SIDE NAV ===== */
#sidenav {
  position: fixed;
  right: 32px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
  z-index: 200;
}

.sidenav-logo {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--primary);
  letter-spacing: 0.1em;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px 0 10px;
  margin-bottom: 4px;
  transition: opacity 0.2s;
}
.sidenav-logo:hover { opacity: 0.7; }

.sidenav-links {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
}

#sidenav a,
.sidenav-links a {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-light);
  padding: 5px 0 5px 16px;
  position: relative;
  transition: color 0.2s;
  letter-spacing: 0.02em;
  text-decoration: none;
  display: block;
}

#sidenav a::after,
.sidenav-links a::after {
  content: '';
  position: absolute;
  right: -12px;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--border);
  transition: background 0.2s, transform 0.2s;
}

#sidenav a:hover,
.sidenav-links a:hover { color: var(--primary); }
#sidenav a:hover::after,
.sidenav-links a:hover::after { background: var(--accent); transform: translateY(-50%) scale(1.5); }

#sidenav a.active,
.sidenav-links a.active {
  color: var(--primary);
  font-weight: 600;
}
#sidenav a.active::after,
.sidenav-links a.active::after {
  background: var(--primary);
  transform: translateY(-50%) scale(1.5);
}

.sidenav-contact {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-light);
  margin-top: 10px;
  padding: 5px 0 5px 16px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: color 0.2s;
  text-decoration: none;
}
.sidenav-contact:hover { color: var(--primary); }

/* ===== PAGES ===== */
.page {
  position: fixed;
  inset: 0;
  background: var(--bg);
  z-index: 100;
  overflow-y: auto;
  transform: translateX(100%);
  opacity: 0;
  transition: transform 0.52s cubic-bezier(0.4, 0, 0.2, 1),
              opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.page.active {
  transform: translateX(0);
  opacity: 1;
}

/* Slide back out to the right when closing to home */
.page.closing {
  transform: translateX(100%);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.42s cubic-bezier(0.4, 0, 0.2, 1),
              opacity 0.32s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Incoming page sits on top of the departing page */
.page.incoming {
  z-index: 101;
}

/* ===== PAGE HEADER (global, shared across all pages) ===== */
#page-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 150;
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 10px 28px;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transform: translateY(-100%);
  opacity: 0;
  transition: transform 0.38s cubic-bezier(0.4, 0, 0.2, 1),
              opacity 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none;
}
#page-header.visible {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.ph-profile {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
}

.ph-photo {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--accent-light);
  flex-shrink: 0;
}

.ph-info {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.ph-name {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
  font-family: var(--font-display);
  line-height: 1.2;
}

.ph-role {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 400;
  line-height: 1.2;
}

.ph-badges {
  display: flex;
  gap: 8px;
  align-items: center;
}

.ph-badge {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--primary-mid);
  background: var(--accent-pale);
  border: 1px solid var(--accent-light);
  border-radius: 20px;
  padding: 3px 9px;
  white-space: nowrap;
}

.page-back {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-muted);
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  transition: color 0.15s, background 0.15s;
  font-family: var(--font-body);
  flex-shrink: 0;
}
.page-back:hover { color: var(--primary); background: var(--bg-alt); }
.page-back svg { width: 15px; height: 15px; }

.page-title {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

.page > .container {
  padding-top: 80px;
  padding-bottom: 80px;
}

/* ===== HERO ===== */
#hero {
  min-height: 100vh;
  padding: 64px 0 48px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.hero-container {
  max-width: 1120px;
  margin: 0 auto;
  width: 100%;
  padding: 0 28px;
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 72px;
  align-items: center;
}

.hero-scroll-hint {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-light);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding-bottom: 8px;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--text-light), transparent);
  animation: scroll-pulse 2s ease-in-out infinite;
}

@keyframes scroll-pulse {
  0%, 100% { opacity: 0.4; transform: scaleY(1) translateY(0); }
  50% { opacity: 1; transform: scaleY(0.8) translateY(4px); }
}

.hero-name {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 3.2rem);
  font-weight: 400;
  font-style: italic;
  color: var(--primary);
  margin-bottom: 10px;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.hero-role {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 4px;
}

.hero-affil {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 14px;
  font-weight: 300;
}

.hero-affil a {
  color: var(--primary-mid);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--accent-light);
  transition: text-decoration-color 0.2s;
}
.hero-affil a:hover { text-decoration-color: var(--accent); }

.hero-honors {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  font-weight: 400;
}

.hero-bio {
  font-size: 1rem;
  color: var(--text);
  max-width: 580px;
  line-height: 1.75;
  margin-bottom: 28px;
  font-weight: 300;
}

.hero-research {
  max-width: 1120px;
  margin: 40px auto 0;
  padding: 0 28px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
  border-top: 1px solid var(--border);
  padding-top: 8px;
}

.research-line {
  padding: 16px 18px;
  border-radius: var(--radius-sm);
  transition: background 0.2s;
}

.research-line:hover { background: var(--bg-card); }

.research-header {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 5px;
  flex-wrap: wrap;
}

.research-topic {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary);
  white-space: nowrap;
}

.research-papers {
  display: flex;
  gap: 5px;
  flex-wrap: wrap;
}

.research-papers a {
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--text-muted);
  padding: 2px 8px;
  border-radius: 100px;
  background: var(--bg-alt);
  white-space: nowrap;
  transition: background 0.2s, color 0.2s;
}

.research-papers a:hover { background: var(--accent); color: #fff; }

.research-papers a.paper-award { background: #FEF3C7; color: #92400E; }
.research-papers a.paper-award:hover { background: #F59E0B; color: #fff; }

.research-desc {
  font-size: 0.8rem;
  color: var(--text-light);
  font-weight: 300;
  line-height: 1.5;
  margin: 0;
}

.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.social-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 5px 12px 5px 10px;
  border-radius: 6px;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}

.social-badge svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.social-badge:hover {
  color: var(--primary);
  border-color: var(--accent);
  background: var(--accent-pale);
}

/* photo */
.hero-right { display: flex; justify-content: flex-end; }

.hero-photo {
  width: 200px;
  height: 200px;
  border-radius: 16px;
  object-fit: cover;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
}

/* ===== SECTIONS ===== */
.section { padding: 100px 28px; }
.section-alt { background: var(--bg-alt); }

.container { max-width: 1120px; margin: 0 auto; }

.section-eyebrow {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}

.section-heading {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 300;
  font-style: italic;
  color: var(--primary);
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.section-lead {
  font-size: 1.05rem;
  color: var(--text);
  max-width: 680px;
  line-height: 1.72;
  margin-bottom: 56px;
  font-weight: 300;
}

.section-lead strong { font-weight: 600; color: var(--primary); }

.inline-link {
  color: var(--primary-mid);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--accent-light);
  transition: text-decoration-color 0.2s;
}
.inline-link:hover { text-decoration-color: var(--accent); }

/* ===== RESEARCH CARDS ===== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px 30px;
  position: relative;
  overflow: hidden;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), border-color 0.25s var(--ease);
}

.card::after {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px;
  height: 100%;
  background: var(--accent);
  opacity: 0;
  transition: opacity 0.25s var(--ease);
}

.card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); border-color: var(--accent-light); }
.card:hover::after { opacity: 1; }

.card-glyph { font-size: 1.4rem; color: var(--accent); margin-bottom: 14px; line-height: 1; }
.card h3 { font-size: 0.9375rem; font-weight: 600; color: var(--primary); margin-bottom: 10px; }
.card p { font-size: 0.875rem; color: var(--text-muted); line-height: 1.65; font-weight: 300; }

/* reveal animation */
[data-reveal] { opacity: 0; transform: translateY(28px); transition: opacity 0.6s var(--ease), transform 0.6s var(--ease); }
[data-reveal].revealed { opacity: 1; transform: none; }

/* ===== EXPERIENCE ===== */
.exp-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.exp-item {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
}

.exp-item:first-child { border-top: 1px solid var(--border); }

.exp-meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-top: 2px;
}

.exp-org {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary);
}

.exp-date {
  font-size: 0.775rem;
  color: var(--text-light);
  font-weight: 500;
  letter-spacing: 0.02em;
}

.exp-body h3 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
}

.exp-super {
  font-size: 0.8125rem;
  color: var(--text-muted);
  font-weight: 300;
  font-style: italic;
  margin-bottom: 6px;
}

.exp-body p:not(.exp-super) {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.65;
  font-weight: 300;
}

/* ===== NEWS ===== */
.news-timeline {
  display: flex;
  flex-direction: column;
  position: relative;
  margin-bottom: 28px;
}

.news-timeline::before {
  content: '';
  position: absolute;
  left: 76px;
  top: 0; bottom: 0;
  width: 1px;
  background: var(--border);
}

.news-item {
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 0;
  padding: 18px 0;
}

.news-item.hidden { display: none; }

.news-date {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-light);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-align: right;
  padding-top: 4px;
  padding-right: 16px;
}

.news-body {
  padding-left: 28px;
  position: relative;
}

.news-body::before {
  content: '';
  position: absolute;
  left: -4.5px;
  top: 8px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg-alt);
}

.news-body p { font-size: 0.9375rem; color: var(--text); line-height: 1.6; font-weight: 400; }
.news-body strong { color: var(--primary); font-weight: 600; }
.news-body em { font-style: italic; color: var(--text-muted); }

.btn-ghost {
  background: transparent;
  border: 1.5px solid var(--border);
  color: var(--primary);
  padding: 10px 26px;
  border-radius: 100px;
  font-size: 0.875rem;
  font-weight: 500;
  font-family: var(--font-body);
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.btn-ghost:hover { background: var(--primary); border-color: var(--primary); color: #fff; }

/* ===== PUBLICATIONS ===== */
.scholar-note {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin: -8px 0 20px;
}
.scholar-link {
  color: var(--primary-mid);
  font-weight: 500;
  text-decoration: underline;
  text-decoration-color: var(--accent-light);
  text-underline-offset: 2px;
  transition: color 0.15s;
}
.scholar-link:hover { color: var(--accent); }

.pub-controls {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 40px;
}

.pub-controls-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.filter-row { display: flex; gap: 8px; flex-wrap: wrap; }

.filter-btn {
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 6px 18px;
  border-radius: 100px;
  border: 1.5px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.filter-btn:hover, .filter-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.search-wrap { position: relative; }

.search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 15px;
  height: 15px;
  color: var(--text-light);
  pointer-events: none;
}

.search-input {
  font-family: var(--font-body);
  font-size: 0.875rem;
  padding: 8px 16px 8px 34px;
  border: 1.5px solid var(--border);
  border-radius: 100px;
  background: var(--bg-card);
  color: var(--text);
  width: 280px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.search-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-pale); }
.search-input::placeholder { color: var(--text-light); }

.pub-list { display: flex; flex-direction: column; gap: 14px; }

.pub-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 22px 26px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: start;
  transition: box-shadow 0.2s, border-color 0.2s;
}

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

.pub-card.award-paper {
  border-left: 3px solid #F59E0B;
  background: linear-gradient(to right, #FFFDF0 0%, var(--bg-card) 160px);
}

.pub-venue-row { display: flex; align-items: center; gap: 7px; margin-bottom: 8px; flex-wrap: wrap; }

.venue-chip {
  font-size: 0.68rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 100px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.venue-acl, .venue-emnlp   { background: #DBEAFE; color: #1E40AF; }
.venue-sigir, .venue-ictir  { background: #FEE2E2; color: #991B1B; }
.venue-iclr, .venue-neurips { background: #EDE9FE; color: #5B21B6; }
.venue-www                  { background: #CCFBF1; color: #0F766E; }
.venue-asplos               { background: #FEF3C7; color: #92400E; }
.venue-workshop             { background: var(--accent-pale); color: var(--primary); }
.venue-arxiv                { background: #F3F4F6; color: #374151; }

.award-chip {
  font-size: 0.68rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 100px;
  background: #FEF3C7;
  color: #92400E;
  border: 1px solid #FDE68A;
  letter-spacing: 0.04em;
}

.pub-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--primary);
  line-height: 1.45;
  margin-bottom: 7px;
}

.pub-title a { color: inherit; transition: color 0.2s; }
.pub-title a:hover { color: var(--primary-mid); text-decoration: underline; text-underline-offset: 3px; }

.pub-authors {
  font-size: 0.8375rem;
  color: var(--text-muted);
  margin-bottom: 10px;
  line-height: 1.5;
  font-weight: 300;
}

.pub-authors .me { color: var(--primary); font-weight: 500; }

.pub-desc {
  font-size: 0.8125rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-top: 6px;
  margin-bottom: 10px;
  font-weight: 300;
}

.pub-links { display: flex; gap: 7px; flex-wrap: wrap; }

.pub-link {
  font-size: 0.76rem;
  font-weight: 500;
  padding: 4px 12px;
  border-radius: 100px;
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.pub-link:hover { background: var(--primary); border-color: var(--primary); color: #fff; }

.pub-year {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-light);
  letter-spacing: 0.06em;
  white-space: nowrap;
  padding-top: 2px;
}

.pub-topics {
  display: flex;
  gap: 5px;
  flex-wrap: wrap;
  margin-top: 10px;
}

.topic-tag {
  font-size: 0.68rem;
  font-weight: 600;
  padding: 2px 9px;
  border-radius: 100px;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: opacity 0.2s;
}

.topic-tag:hover { opacity: 0.75; }

.topic-RAG         { background: #D1FAE5; color: #065F46; }
.topic-Personalization { background: #DBEAFE; color: #1E40AF; }
.topic-Agents      { background: #EDE9FE; color: #5B21B6; }
.topic-Long-context { background: #FEF3C7; color: #92400E; }
.topic-Multimodal  { background: #CCFBF1; color: #0F766E; }
.topic-NLP         { background: #F3F4F6; color: #374151; }

/* Contribution tags — outlined pills, clickable, appear after topic tags */
.pub-topics-divider {
  display: inline-block;
  width: 1px;
  height: 14px;
  background: var(--border);
  margin: 0 6px;
  vertical-align: middle;
  opacity: 0.6;
}

.contrib-tag {
  font-size: 0.63rem;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 100px;
  border: 1px solid currentColor;
  background: transparent;
  cursor: pointer;
  transition: background 0.15s, opacity 0.15s;
  opacity: 0.65;
}
.contrib-tag:hover { opacity: 1; background: color-mix(in srgb, currentColor 8%, transparent); }

.contrib-ReAct            { color: #6D28D9; }
.contrib-Benchmark        { color: #B45309; }
.contrib-Evaluation       { color: #B91C1C; }
.contrib-Reasoning        { color: #4338CA; }
.contrib-Reinforcement-Learning { color: #6D28D9; }
.contrib-Privacy          { color: #9D174D; }
.contrib-Inference        { color: #0369A1; }
.contrib-Survey           { color: #475569; }
.contrib-Multi-Agent      { color: #7C3AED; }
.contrib-Data-Science     { color: #0F766E; }
.contrib-Feedback         { color: #9A3412; }
.contrib-Self-Training    { color: #3F6212; }
.contrib-Planning         { color: #1D4ED8; }
.contrib-Diversity        { color: #0E7490; }
.contrib-Long-form        { color: #6D28D9; }
.contrib-Test-Time-Scaling { color: #7C2D12; }
.contrib-Evaluation       { color: #B91C1C; }
.contrib-Factuality       { color: #92400E; }
.contrib-Systems          { color: #334155; }
.contrib-Hardware         { color: #334155; }
.contrib-Ranking          { color: #1D4ED8; }
.contrib-Fine-tuning      { color: #0369A1; }
.contrib-Dense-Retrieval  { color: #065F46; }
.contrib-VQA              { color: #5B21B6; }
.contrib-Translation      { color: #0C4A6E; }
.contrib-Low-resource     { color: #78350F; }
.contrib-Summarization    { color: #92400E; }
.contrib-Pre-training     { color: #3F6212; }
.contrib-Toxicity         { color: #991B1B; }
.contrib-Span-Detection   { color: #7F1D1D; }
.contrib-Memory           { color: #92400E; }

.pub-empty { text-align: center; color: var(--text-muted); padding: 56px; font-size: 0.9375rem; }
.hidden { display: none !important; }

/* ===== AWARDS ===== */
.awards-list { display: flex; flex-direction: column; gap: 14px; }

.award {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 22px 26px;
  transition: box-shadow 0.2s, transform 0.2s;
}

.award:hover { box-shadow: var(--shadow-sm); transform: translateX(4px); }

.award-featured {
  border-left: 3px solid #F59E0B;
  background: linear-gradient(to right, #FFFDF0 0%, var(--bg-card) 160px);
}

.award-trophy { font-size: 1.5rem; line-height: 1; flex-shrink: 0; margin-top: 2px; }

.award-body h3 { font-size: 0.9375rem; font-weight: 600; color: var(--primary); margin-bottom: 5px; }
.award-body p { font-size: 0.875rem; color: var(--text-muted); line-height: 1.5; font-weight: 300; margin-bottom: 6px; }
.award-year { font-size: 0.72rem; font-weight: 700; color: var(--text-light); letter-spacing: 0.06em; }

/* ===== TALKS ===== */
.talks-list { display: flex; flex-direction: column; }

.talk-item {
  display: grid;
  grid-template-columns: 90px 1fr auto;
  align-items: baseline;
  gap: 20px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}
.talk-item:first-child { border-top: 1px solid var(--border); }

.talk-date {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 400;
  white-space: nowrap;
}
.talk-title {
  font-size: 0.9375rem;
  color: var(--text);
  font-weight: 400;
}
.talk-venue {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--primary);
  white-space: nowrap;
  text-align: right;
}

@media (max-width: 600px) {
  .talk-item { grid-template-columns: 1fr; gap: 4px; }
  .talk-venue { text-align: left; }
}

/* ===== SERVICE ===== */
.service-section { margin-bottom: 36px; }

.service-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-bottom: 36px;
}
@media (max-width: 640px) { .service-row { grid-template-columns: 1fr; } }

.service-group-title {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 14px;
}

/* Organizing */
.service-org-list { display: flex; flex-direction: column; gap: 12px; }
.service-org-item {
  padding: 14px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
}
.service-org-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 4px;
}
.service-org-venue {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--primary);
}
.service-org-role {
  font-size: 0.75rem;
  color: var(--text-muted);
  background: color-mix(in srgb, var(--primary) 10%, transparent);
  padding: 2px 8px;
  border-radius: 100px;
}
.service-org-desc {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin: 0;
}

/* PC / Reviewing badges */
.service-badges { display: flex; flex-wrap: wrap; gap: 7px; }
.service-badge {
  font-size: 0.775rem;
  padding: 4px 11px;
  border-radius: 100px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  font-weight: 400;
}

/* Mentoring */
.service-mentor-list { display: flex; flex-direction: column; gap: 12px; }
.service-mentor-item {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto;
  gap: 0 12px;
}
.service-mentor-program {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text);
  grid-column: 1;
}
.service-mentor-year {
  font-size: 0.78rem;
  color: var(--text-muted);
  grid-column: 2;
  grid-row: 1;
  text-align: right;
  white-space: nowrap;
}
.service-mentor-desc {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin: 3px 0 0;
  grid-column: 1 / -1;
  font-weight: 300;
}

/* ===== FOOTER ===== */
footer {
  background: var(--primary);
  color: #fff;
  padding: 64px 28px 36px;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.footer-name {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 300;
  font-style: italic;
  color: var(--accent-light);
  margin-bottom: 8px;
}

.footer-sub {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.55);
  line-height: 1.65;
  margin-bottom: 12px;
  font-weight: 300;
}

.footer-email { font-size: 0.875rem; color: var(--accent); font-weight: 500; transition: color 0.2s; }
.footer-email:hover { color: var(--accent-light); }

.footer-links { display: flex; flex-direction: column; gap: 8px; align-items: flex-end; }
.footer-links a { font-size: 0.875rem; color: rgba(255, 255, 255, 0.55); font-weight: 300; transition: color 0.2s; }
.footer-links a:hover { color: var(--accent-light); }

.footer-bottom { text-align: center; }
.footer-bottom p { font-size: 0.8rem; color: rgba(255, 255, 255, 0.25); }

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .hero-container { grid-template-columns: 1fr; gap: 40px; }
  .hero-right { justify-content: flex-start; }
  .hero-photo { width: 160px; height: 160px; }
  .cards-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  #hero-nav { display: none; }
  .nav-links { display: none; }
  .menu-toggle { display: flex; }
  .section { padding: 72px 20px; }
  .exp-item { grid-template-columns: 1fr; gap: 6px; }
  .hero-research { grid-template-columns: 1fr; padding: 8px 20px 0; }
  .hero-container { padding: 0 20px; gap: 32px; }
  .research-header { flex-wrap: wrap; }
  .research-papers { justify-content: flex-start; }

  .pub-controls-bottom { flex-direction: column; align-items: stretch; }
  .search-input { width: 100%; }
  .pub-card { grid-template-columns: 1fr; }
  .pub-year { order: -1; }

  .news-timeline::before { left: 58px; }
  .news-item { grid-template-columns: 58px 1fr; }

  .footer-content { flex-direction: column; }
  .footer-links { align-items: flex-start; flex-direction: row; flex-wrap: wrap; }

  .hero-scroll-hint { display: none; }
}

@media (max-width: 480px) {
  .hero-name { font-size: 2.75rem; }
  .hero-tags { gap: 6px; }
  .hero-tag { font-size: 0.72rem; }
  .section { padding: 56px 16px; }
}