/* ============================================================
   Personal academic page — clean white, Inter-based typography
   Based on Jon Barron's table layout, restyled for modern look
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Newsreader:ital,wght@0,400;0,600;1,400&display=swap');

:root {
  --fg: #1f2328;
  --fg-soft: #4a5159;
  --muted: #6e7681;
  --bg: #ffffff;
  --accent: #1772d0;
  --accent-hover: #f09228;
  --rule: #e5e7eb;
  --highlight: #fff8c5;
}

* { box-sizing: border-box; }

html, body {
  background: var(--bg);
  color: var(--fg);
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body, td, th, tr, p, a, li {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.65;
  color: var(--fg);
}

p {
  margin: 0.6em 0;
  color: var(--fg-soft);
}

strong { font-weight: 600; color: var(--fg); }
em     { font-style: italic; color: var(--fg-soft); }

/* ---------- Links ---------- */
a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .15s ease, border-color .15s ease;
}
a:hover, a:focus {
  color: var(--accent-hover);
  border-bottom-color: var(--accent-hover);
}

/* ---------- Headings ---------- */
h2 {
  margin: 0 0 12px 0;
  padding: 0 0 8px 0;
  font-family: 'Inter', sans-serif;
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--fg);
  border-bottom: 1px solid var(--rule);
}

/* ---------- Name (top of page) ---------- */
.name {
  padding-top: 8px;
  margin: 0 0 8px 0;
  font-family: 'Newsreader', 'Inter', serif;
  font-size: 38px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--fg);
}

.subtitle {
  margin: 0 0 14px 0;
  font-size: 15px;
  color: var(--muted);
  font-weight: 400;
}

/* ---------- Page header (name + nav inline) ---------- */
.page-header {
  max-width: 1000px;
  margin: 0 auto;
  padding: 28px 2.5% 0;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 24px;
  flex-wrap: wrap;
}
.page-header .name {
  margin: 0;
  padding: 0;
}

.topnav {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.topnav a {
  font-size: 14px;
  font-weight: 500;
  color: var(--fg-soft);
  border-bottom: none;
}
.topnav a:hover { color: var(--accent); }
@media (max-width: 600px) {
  .page-header { gap: 8px; }
  .topnav { gap: 12px; }
  .topnav a { font-size: 13px; }
}

/* ---------- Header link row (text style) ---------- */
.links-text {
  text-align: center;
  margin-top: 14px;
  font-size: 14px;
}
.links-text a { font-weight: 500; }
.links-text .sep { color: var(--muted); margin: 0 6px; }

/* ---------- Icon-only round buttons (used in Contact) ---------- */
.icon-links {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 14px;
}
.icon-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--rule);
  border-radius: 50%;
  color: var(--fg-soft);
  transition: color .15s ease, border-color .15s ease, background .15s ease, transform .15s ease;
}
.icon-links a:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(23,114,208,0.06);
  transform: translateY(-1px);
}
.icon-links a svg { width: 18px; height: 18px; }

/* ---------- News & Education lists ---------- */
ul.clean {
  list-style: none;
  padding: 0;
  margin: 6px 0;
}
ul.clean li {
  padding: 6px 0;
  color: var(--fg-soft);
}
ul.clean li .date {
  display: inline-block;
  min-width: 78px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  font-weight: 500;
}

/* ---------- Publications ---------- */
.papertitle {
  font-family: 'Inter', sans-serif;
  font-size: 15px;
  font-weight: 600;
  color: var(--fg);
}
a .papertitle { color: var(--accent); }
a:hover .papertitle { color: var(--accent-hover); }

.one {
  width: 160px;
  height: 160px;
  position: relative;
  border-radius: 6px;
  overflow: hidden;
}
.two {
  width: 160px;
  height: 160px;
  position: absolute;
  transition: opacity .25s ease-in-out;
}
.fade { transition: opacity .25s ease-in-out; }

span.highlight {
  background-color: var(--highlight);
  padding: 0 3px;
  border-radius: 2px;
}

/* ---------- Publication buttons (project page / arXiv / code) ---------- */
.pub-buttons {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 10px;
}
.pub-buttons a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 11px;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--fg-soft);
  background: #f6f8fa;
  border: 1px solid var(--rule);
  border-radius: 6px;
  transition: color .15s ease, border-color .15s ease, background .15s ease;
}
.pub-buttons a:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(23,114,208,0.08);
}
.pub-buttons svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

/* ---------- Timeline (Education / Experience) ---------- */
ul.timeline {
  list-style: none;
  padding: 0;
  margin: 6px 0 0 0;
  position: relative;
}
ul.timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--rule);
}
ul.timeline > li {
  position: relative;
  padding: 6px 0 18px 32px;
}
ul.timeline > li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 12px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #ffffff;
  border: 2px solid var(--accent);
  box-shadow: 0 0 0 3px #ffffff;
}
ul.timeline > li:last-child { padding-bottom: 4px; }

.tl-date {
  display: block;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 2px;
  font-variant-numeric: tabular-nums;
}
.tl-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--fg);
  margin: 0;
}
.tl-place {
  font-style: italic;
  color: var(--fg-soft);
  font-size: 14px;
  margin: 2px 0 0 0;
}
.tl-meta {
  color: var(--muted);
  font-size: 13px;
  margin: 4px 0 0 0;
}
ul.timeline ul {
  margin: 6px 0 0 0;
  padding-left: 18px;
  color: var(--fg-soft);
}
ul.timeline ul li { padding: 2px 0; font-size: 14px; }

/* ---------- Split (two-column) section ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  padding: 16px;
}
.split > div { min-width: 0; }
.split h2 { margin-bottom: 14px; }
.split ul.timeline > li { padding-bottom: 16px; }
.split ul.timeline > li:last-child { padding-bottom: 0; }
@media (max-width: 720px) {
  .split { grid-template-columns: 1fr; gap: 4px; }
}

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  align-items: start;
  margin-top: 8px;
}
@media (max-width: 720px) {
  .contact-grid { grid-template-columns: 1fr; }
}
.contact-map iframe {
  width: 100%;
  height: 280px;
  border: 0;
  border-radius: 8px;
  filter: grayscale(0.25) contrast(0.95);
  box-shadow: 0 2px 12px rgba(0,0,0,0.05);
}
.contact-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.contact-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--fg-soft);
  font-size: 14px;
}
.contact-list svg {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  color: var(--muted);
}
.contact-list a { font-weight: 500; }

/* ---------- Profile photo ---------- */
.profile-photo {
  width: 100%;
  max-width: 100%;
  object-fit: cover;
  border-radius: 6px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.06);
}

/* ---------- Footer ---------- */
.footer {
  text-align: right;
  font-size: 12px;
  color: var(--muted);
  padding: 32px 0 24px;
}
.footer a { color: var(--muted); }

/* ---------- Mobile ---------- */
@media (max-width: 600px) {
  .name { font-size: 30px; }
  body, td, th, tr, p, a, li { font-size: 14px; }
  .topnav a { margin: 0 6px; font-size: 13px; }
  .one, .two { width: 110px; height: 110px; }
}

/* ============================================================
   DyMoS Interactive Publication Widget
   (2x2 baseline↔DyMoS slider grid; click to flip to whitehorse
    static↔dynamic slider)
   ============================================================ */
.pub-interactive {
  padding: 0;
  margin: 0;
  width: 100%;
}
/* Shared two-column layout for publications (thumbnail + info) */
.pub-row {
  display: grid;
  grid-template-columns: 25% 1fr;
  gap: 20px;
  margin: 14px 0 28px;
  align-items: center;
}
.pub-row > .pub-thumb img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 6px;
}
@media (max-width: 720px) {
  .pub-row { grid-template-columns: 1fr; }
}
.flip-card-wrap {
  width: 100%;
  perspective: 1500px;
  margin-bottom: 12px;
}
.flip-card {
  position: relative;
  width: 100%;
  transform-style: preserve-3d;
  transition: transform .75s cubic-bezier(.4,.0,.2,1);
}
.flip-card.flipped { transform: rotateY(180deg); }
.flip-face {
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--rule);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}
.flip-front { position: relative; }
.flip-back  {
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 100%;
  transform: rotateY(180deg);
}

.pub-widget-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 9px 14px;
  background: #fafbfc;
  border-bottom: 1px solid var(--rule);
  flex-shrink: 0;
}
.pub-widget-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--fg);
  letter-spacing: -0.01em;
}
.pub-flip-btn {
  position: absolute;
  top: 6px;
  right: 6px;
  z-index: 5;
  width: 24px;
  height: 24px;
  padding: 0;
  border: 1px solid rgba(255,255,255,0.7);
  border-radius: 50%;
  background: rgba(0,0,0,0.55);
  cursor: pointer;
  color: white;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all .15s ease;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}
.pub-flip-btn:hover { background: rgba(23,114,208,0.85); border-color: white; }
.pub-flip-btn svg { width: 12px; height: 12px; }

/* Bottom strip footer common to both faces */
.widget-foot {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  background: #fafbfc;
  border-top: 1px solid var(--rule);
  flex-shrink: 0;
  font-size: 10px;
  font-weight: 600;
  color: var(--fg-soft);
}
.widget-foot > span:first-child,
.widget-foot > span:last-child { white-space: nowrap; }
.sd-foot .sd-axis-label.static  { color: #475569; }
.sd-foot .sd-axis-label.dynamic { color: #b91c1c; }

/* ---- FRONT: single baseline↔DyMoS comparison ---- */
.compare-grid {
  display: grid;
  grid-template-columns: 1fr;
  aspect-ratio: 1.793;     /* exact source video aspect (832/464) */
  width: 100%;
  background: #000;
}
.compare-cell {
  position: relative;
  overflow: hidden;
  background: #000;
  border-radius: 4px;
  cursor: ew-resize;
  user-select: none;
  -webkit-user-select: none;
  min-height: 0;
  touch-action: none;
}
.compare-cell video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  pointer-events: none;
  display: block;
}
.compare-cell .layer-ours {
  /* default: half-revealed */
  clip-path: inset(0 0 0 50%);
}
.cell-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 2px;
  background: white;
  left: 50%;
  transform: translateX(-50%);
  pointer-events: none;
  box-shadow: 0 0 4px rgba(0,0,0,0.6);
}
.cell-handle::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 22px;
  height: 22px;
  border: 2px solid white;
  background: rgba(0,0,0,0.35);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  box-shadow: 0 1px 6px rgba(0,0,0,0.5);
}
.cell-label-base,
.cell-label-ours {
  position: absolute;
  top: 6px;
  font-size: 10px;
  font-weight: 600;
  color: white;
  background: rgba(0,0,0,0.55);
  padding: 1px 6px;
  border-radius: 3px;
  pointer-events: none;
  letter-spacing: 0.02em;
}
.cell-label-base { left: 6px; }
.cell-label-ours { right: 6px; }

.grid-axis-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px;
  background: #fafbfc;
  border-top: 1px solid var(--rule);
  flex-shrink: 0;
  font-size: 11px;
  font-weight: 600;
  color: var(--fg-soft);
}
.grid-axis-arrow {
  flex: 1;
  height: 1px;
  background: var(--rule);
  margin: 0 14px;
  position: relative;
}
.grid-axis-arrow::before,
.grid-axis-arrow::after {
  content: '';
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 0;
  height: 0;
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
}
.grid-axis-arrow::before {
  left: 0;
  border-right: 6px solid var(--rule);
}
.grid-axis-arrow::after {
  right: 0;
  border-left: 6px solid var(--rule);
}

/* ---- BACK: single whitehorse pane + 4-step static↔dynamic slider ---- */
.sd-stage {
  position: relative;
  aspect-ratio: 1.793;
  width: 100%;
  background: #000;
  overflow: hidden;
}
.sd-stage video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity .2s ease;
  display: block;
}
.sd-stage video.active { opacity: 1; }
.sd-axis-bar {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 16px;
  background: #fafbfc;
  border-top: 1px solid var(--rule);
  flex-shrink: 0;
}
.sd-axis-label {
  font-size: 12px;
  font-weight: 600;
}
.sd-axis-label.static  { color: #475569; }
.sd-axis-label.dynamic { color: #b91c1c; }
.sd-slot-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 2px;
  position: relative;
}
.sd-slider {
  width: 100%;
  -webkit-appearance: none;
  appearance: none;
  height: 5px;
  background: linear-gradient(to right, #475569, #b91c1c);
  border-radius: 3px;
  outline: none;
  cursor: pointer;
  margin: 0;
}
/* 4 tick dots aligned with slider snap positions (0, 1, 2, 3) */
.sd-ticks {
  position: relative;
  height: 8px;
}
.sd-ticks::before {
  content: '';
  position: absolute;
  left: 6px; right: 6px; top: 0; bottom: 0;
  background-image:
    radial-gradient(circle, var(--muted) 1.5px, transparent 2px),
    radial-gradient(circle, var(--muted) 1.5px, transparent 2px),
    radial-gradient(circle, var(--muted) 1.5px, transparent 2px),
    radial-gradient(circle, var(--muted) 1.5px, transparent 2px);
  background-repeat: no-repeat;
  background-size: 4px 4px;
  background-position: 0% 50%, 33.33% 50%, 66.67% 50%, 100% 50%;
}
.sd-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  background: white;
  border: 2px solid var(--accent);
  border-radius: 50%;
  cursor: grab;
  box-shadow: 0 1px 4px rgba(0,0,0,0.25);
}
.sd-slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  background: white;
  border: 2px solid var(--accent);
  border-radius: 50%;
  cursor: grab;
  box-shadow: 0 1px 4px rgba(0,0,0,0.25);
}

/* Mobile tweaks */
@media (max-width: 600px) {
  .pub-widget-title { font-size: 12px; }
  .pub-flip-btn { font-size: 10px; height: 22px; padding: 0 8px; }
  .cell-handle::after { width: 16px; height: 16px; }
  .cell-label-base, .cell-label-ours { font-size: 9px; }
}