/* ================================================================
   PERSONAL ACADEMIC WEBSITE
   Palette : Warm Parchment #f5f2ec  ×  Terracotta #b85c38
   Fonts   : Cormorant Garamond (serif)  +  DM Sans (sans)
   ================================================================ */

/* ── Variables ───────────────────────────────────────────────── */
:root {
  --bg:          #f5f2ec;
  --accent:      #b85c38;
  --accent-dark: #8f3f22;
  --text:        #2a2318;
  --muted:       #7a6e5f;
  --border:      #ddd5c5;
  --card:        rgba(255, 255, 255, 0.52);
  --glass-bg:    rgba(245, 242, 236, 0.74);
  --surface:     #ede8df;
  --surface-2:   #ddd5c4;
  --panel:       rgba(255,255,255,0.72);
  --accent-wash: rgba(184,92,56,0.09);
  --shadow:      rgba(42, 35, 24, 0.08);
  --shadow-strong: rgba(42, 35, 24, 0.18);
  --nav-h:       52px;
  --max-w:       700px;
  --ease:        cubic-bezier(0.22, 1, 0.36, 1);
}

:root[data-theme='dark'] {
  --bg:          #161310;
  --accent:      #d58b66;
  --accent-dark: #f0b08c;
  --text:        #f3eadc;
  --muted:       #b8aa97;
  --border:      #4c4035;
  --card:        rgba(30, 27, 24, 0.72);
  --glass-bg:    rgba(22, 19, 16, 0.82);
  --surface:     #241f1a;
  --surface-2:   #191511;
  --panel:       rgba(35, 31, 27, 0.9);
  --accent-wash: rgba(213,139,102,0.16);
  --shadow:      rgba(0, 0, 0, 0.28);
  --shadow-strong: rgba(0, 0, 0, 0.42);
}

/* ── Reset ───────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Sans', system-ui, sans-serif;
  font-size: clamp(14.5px, 1.1vw, 16.5px);
  line-height: 1.75;
  min-height: 100vh;
  transition: background-color 0.25s ease, color 0.25s ease;
}

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

/* ── Noise texture overlay ───────────────────────────────────── */
.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9000;
  opacity: 0.038;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='220'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.82' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='220' height='220' filter='url(%23n)'/%3E%3C/svg%3E");
}

:root[data-theme='dark'] .noise { opacity: 0.028; }

/* ── Frosted-glass nav ───────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 500;
  display: flex;
  align-items: center;
  gap: 0.2rem;
  height: var(--nav-h);
  padding: 0 1.6rem;
  background: var(--glass-bg);
  backdrop-filter: blur(18px) saturate(1.5);
  -webkit-backdrop-filter: blur(18px) saturate(1.5);
  border-left: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  border-bottom-left-radius: 14px;
}

.nav-link {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 0.3rem 0.7rem;
  border-radius: 6px;
  transition: color 0.2s, background 0.2s;
}
.nav-link:hover,
.nav-link.active { color: var(--accent); background: var(--accent-wash); }

.theme-toggle {
  align-items: center;
  background: transparent;
  border: 1px solid transparent;
  color: var(--muted);
  border-radius: 6px;
  cursor: pointer;
  display: inline-flex;
  height: 2.25rem;
  justify-content: center;
  padding: 0;
  transition: color 0.2s, background 0.2s, border-color 0.2s;
  width: 2.25rem;
}

.theme-toggle:hover,
.theme-toggle:focus-visible {
  color: var(--accent);
  background: var(--accent-wash);
  border-color: var(--border);
  outline: none;
}

.theme-toggle svg {
  height: 1rem;
  width: 1rem;
}

.theme-toggle-icon {
  display: none;
  line-height: 0;
}

.theme-toggle[data-next-theme='dark'] .theme-icon-moon,
.theme-toggle[data-next-theme='light'] .theme-icon-sun {
  display: inline-flex;
}

.visually-hidden {
  border: 0;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  height: 1px;
  margin: -1px;
  overflow: hidden;
  padding: 0;
  position: absolute;
  white-space: nowrap;
  width: 1px;
}

/* ── Animations ──────────────────────────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(22px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes spin {
  to { transform: rotate(360deg); }
}

.anim {
  animation: fadeUp 0.72s var(--ease) var(--delay, 0s) both;
}

/* ── Ruled divider ───────────────────────────────────────────── */
.ruled {
  width: 100%;
  height: 1px;
  background: linear-gradient(
    to right,
    transparent,
    var(--border) 15%,
    var(--border) 85%,
    transparent
  );
  margin: 2rem 0;
}

/* ── Pill buttons (shared) ───────────────────────────────────── */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.42rem;
  padding: 0.48rem 1.05rem;
  border-radius: 999px;
  border: 1.5px solid var(--border);
  background: var(--card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text);
  letter-spacing: 0.015em;
  transition: border-color 0.2s, color 0.2s, background 0.2s, transform 0.2s;
  cursor: pointer;
}
.pill svg { width: 14px; height: 14px; flex-shrink: 0; }
.pill:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-wash);
  transform: translateY(-2px);
}

/* ================================================================
   HOME PAGE
   ================================================================ */

.home-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: calc(var(--nav-h) + 3.5rem) 2rem 5rem;
}

.home-container {
  width: 100%;
  max-width: 520px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

/* ── Profile photo + spinning dashed ring ── */
.profile-wrap {
  margin-bottom: 2rem;
}

.profile-ring-container {
  position: relative;
  width: 210px;
  height: 210px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.profile-ring {
  position: absolute;
  inset: -12px;
  border-radius: 50%;
  border: 2px dashed var(--accent);
  opacity: 0.5;
  animation: spin 26s linear infinite;
}

.profile-photo-wrap {
  position: relative;
  z-index: 1;
  width: 192px;
  height: 192px;
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid var(--border);
  background: var(--surface);
  flex-shrink: 0;
  /* smooth circular crop — prevents jagged edges */
  transform: translateZ(0);
  -webkit-mask-image: -webkit-radial-gradient(circle, white 100%, black 100%);
  mask-image: radial-gradient(circle, white 100%, black 100%);
}

.profile-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  image-rendering: auto;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}

.profile-placeholder {
  display: none;
  width: 100%;
  height: 100%;
  align-items: center;
  justify-content: center;
  font-family: 'Cormorant Garamond', serif;
  font-size: 2.8rem;
  font-weight: 400;
  color: var(--accent);
  background: linear-gradient(135deg, var(--surface) 0%, var(--surface-2) 100%);
  letter-spacing: 0.04em;
}

/* ── Name ── */
.name {
  font-family: 'Cormorant Garamond', serif;
  font-size: clamp(2.3rem, 6vw, 3.4rem);
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.1;
  color: var(--text);
}

/* ── Role tagline ── */
.role {
  font-size: clamp(0.82rem, 1.8vw, 0.95rem);
  font-weight: 400;
  color: var(--muted);
  letter-spacing: 0.05em;
  margin-top: 0.55rem;
}

/* ── About ── */
.about {
  font-size: clamp(0.9rem, 1.6vw, 1.02rem);
  line-height: 1.85;
  text-align: left;
  color: var(--text);
}

/* ── Links row ── */
.links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  justify-content: center;
}

/* ================================================================
   PUBLICATIONS PAGE
   ================================================================ */

.pub-page {
  padding: calc(var(--nav-h) + 3.5rem) 2rem 6rem;
  max-width: var(--max-w);
  margin: 0 auto;
}

.page-title {
  font-family: 'Cormorant Garamond', serif;
  font-size: clamp(2rem, 5vw, 2.8rem);
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.15;
  margin-bottom: 0.35rem;
}

.page-sub {
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 0.5rem;
}

.pub-list {
  list-style: none;
  display: flex;
  flex-direction: column;
}

.pub-item {
  position: relative;
  display: block;
  padding: 1.3rem 2.5rem 1.3rem 1.2rem;
  border-radius: 10px;
  color: inherit;
  text-decoration: none;
  transition: background 0.22s;
  overflow: hidden;
}

/* Animated left accent bar */
.pub-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%) scaleY(0);
  width: 3px;
  height: 60%;
  background: var(--accent);
  border-radius: 0 2px 2px 0;
  transition: transform 0.3s var(--ease), opacity 0.3s;
  opacity: 0;
}

.pub-item + .pub-item { border-top: 1px solid var(--border); }

.pub-item:hover { background: var(--card); }
.pub-item:hover::before { transform: translateY(-50%) scaleY(1); opacity: 1; }

.pub-venue {
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.28rem;
}

.pub-title {
  font-family: 'Cormorant Garamond', serif;
  font-size: clamp(1.05rem, 2.4vw, 1.22rem);
  font-weight: 500;
  line-height: 1.32;
  margin-bottom: 0.32rem;
  color: var(--text);
}

.pub-authors {
  font-size: 0.8rem;
  color: var(--muted);
  line-height: 1.5;
}

.pub-authors .me {
  color: var(--text);
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(42,35,24,0.35);
}

/* Right arrow on hover */
.pub-arrow {
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%) translateX(-8px);
  opacity: 0;
  color: var(--accent);
  transition: opacity 0.22s, transform 0.25s var(--ease);
}
.pub-arrow svg { width: 16px; height: 16px; }
.pub-item:hover .pub-arrow { opacity: 1; transform: translateY(-50%) translateX(0); }

/* ================================================================
   PROJECT PAGE
   ================================================================ */

.project-page {
  padding: calc(var(--nav-h) + 3rem) 2rem 6rem;
  max-width: var(--max-w);
  margin: 0 auto;
}

/* Back nav */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--muted);
  margin-bottom: 2.5rem;
  transition: color 0.2s, gap 0.2s;
  text-transform: uppercase;
}
.back-link svg { width: 14px; height: 14px; }
.back-link:hover { color: var(--accent); gap: 0.6rem; }

/* Venue badge */
.venue-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1.5px solid var(--accent);
  padding: 0.18rem 0.6rem;
  border-radius: 4px;
  margin-bottom: 0.9rem;
}

/* Title */
.project-title {
  font-family: 'Cormorant Garamond', serif;
  font-size: clamp(1.7rem, 4.5vw, 2.55rem);
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.22;
  margin-bottom: 0.9rem;
  color: var(--text);
}

/* Authors */
.project-authors {
  font-size: 0.88rem;
  color: var(--muted);
  margin-bottom: 1.4rem;
  line-height: 1.6;
}
.project-authors .me {
  color: var(--text);
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(42,35,24,0.3);
}

/* Pill links row */
.project-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2.5rem;
}

/* Teaser figure */
.teaser {
  width: 100%;
  aspect-ratio: 16 / 7;
  background: linear-gradient(135deg, var(--surface) 0%, var(--surface-2) 100%);
  border-radius: 10px;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 2.75rem;
  overflow: hidden;
  position: relative;
}

.teaser img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: var(--panel);
}

.teaser-label {
  text-align: center;
  color: var(--muted);
}
.teaser-label svg {
  width: 36px;
  height: 36px;
  opacity: 0.35;
  margin: 0 auto 0.5rem;
  display: block;
}
.teaser-label p {
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* Content sections */
.section { margin-bottom: 2.25rem; }

.section-label {
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.65rem;
}

.section p {
  font-size: clamp(0.9rem, 1.6vw, 1rem);
  line-height: 1.88;
  color: var(--text);
}
.section p + p { margin-top: 0.85rem; }

/* BibTeX block */
.bibtex-wrap { position: relative; }

.bibtex {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.2rem 1.4rem 1.2rem 1.4rem;
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.75rem;
  line-height: 1.75;
  color: var(--text);
  overflow-x: auto;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  white-space: pre;
}

.copy-btn {
  position: absolute;
  top: 0.7rem;
  right: 0.7rem;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--muted);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 0.22rem 0.6rem;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
  letter-spacing: 0.04em;
}
.copy-btn:hover { color: var(--accent); border-color: var(--accent); }

/* ── Project page — extended content styles ─────────────────── */
.workshop-name {
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 0.9rem;
  letter-spacing: 0.01em;
}

.section-heading {
  font-family: 'Cormorant Garamond', serif;
  font-size: clamp(1.1rem, 2.5vw, 1.35rem);
  font-weight: 500;
  margin: 1.5rem 0 0.55rem;
  color: var(--text);
}

.contrib-item {
  padding-left: 1.1rem;
  border-left: 2px solid var(--border);
  margin-bottom: 1.75rem;
  transition: border-color 0.2s;
}
.contrib-item:hover { border-color: var(--accent); }
.contrib-item:last-child { margin-bottom: 0; }

.equation-block {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.5rem;
  margin: 1.1rem 0;
  text-align: center;
  overflow-x: auto;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.figure-block {
  margin: 1.6rem 0;
}

.figure-placeholder {
  width: 100%;
  background: linear-gradient(135deg, var(--surface) 0%, var(--surface-2) 100%);
  border: 1px solid var(--border);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.figure-placeholder.sm  { aspect-ratio: 16 / 6; }
.figure-placeholder.med { aspect-ratio: 16 / 7; }
.figure-placeholder.lg  { aspect-ratio: 16 / 8; }

.figure-placeholder img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: var(--panel);
}

.figure-caption {
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.6;
  margin-top: 0.6rem;
  font-style: italic;
}

/* Image Comparison Slider */
.image-comparison {
  max-width: 420px;
  margin: 1.25rem auto 0;
}

.comparison-container {
  position: relative;
  overflow: hidden;
  border-radius: 10px;
  border: 1px solid var(--border);
  box-shadow: 0 10px 24px var(--shadow);
  background: var(--panel);
}

.comparison-image {
  width: 100%;
  height: auto;
  display: block;
  user-select: none;
}

.overlay-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  clip-path: inset(0 50% 0 0);
}

.comparison-slider {
  position: absolute;
  top: 0;
  left: 50%;
  width: 4px;
  height: 100%;
  background: rgba(255,255,255,0.95);
  cursor: ew-resize;
  z-index: 3;
  transform: translateX(-50%);
  box-shadow: 0 0 10px var(--shadow-strong);
  touch-action: none;
}

.comparison-slider:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.slider-button {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 22px;
  height: 22px;
  background: var(--panel);
  border: 2px solid var(--accent);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  cursor: ew-resize;
  box-shadow: 0 2px 8px var(--shadow-strong);
}

.comparison-labels {
  position: absolute;
  inset: auto 0 0 0;
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.75rem;
  pointer-events: none;
}

.comparison-label {
  background: var(--glass-bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text);
  font-size: 0.72rem;
  font-weight: 500;
  line-height: 1;
  padding: 0.35rem 0.7rem;
  letter-spacing: 0.02em;
}

.left-label {
  color: var(--accent);
}

.results-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin: 1.25rem 0;
}
@media (max-width: 560px) { .results-grid { grid-template-columns: 1fr; } }

.method-labels {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.6rem;
  flex-wrap: wrap;
}
.method-tag {
  font-size: 0.72rem;
  font-weight: 500;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  border: 1.5px solid var(--border);
  color: var(--muted);
  letter-spacing: 0.03em;
}
.method-tag.ours {
  border-color: var(--accent);
  color: var(--accent);
}

/* ── Footnote footer ─────────────────────────────────────────── */
.site-footer {
  text-align: center;
  padding: 2rem;
  font-size: 0.72rem;
  color: var(--border);
  letter-spacing: 0.04em;
  transition: color 0.3s;
  user-select: none;
}
.site-footer:hover { color: var(--muted); }

/* Pin footer to bottom of viewport on the home page */
.is-home .site-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 0.9rem;
}

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width: 640px) {
  .nav { padding: 0 1.1rem; }
  .home-main { padding-top: calc(var(--nav-h) + 2.5rem); }
  .pub-page,
  .project-page { padding: calc(var(--nav-h) + 2rem) 1.1rem 4rem; }
  .pub-item { padding: 1rem 2rem 1rem 1rem; }
  .profile-ring-container { width: 168px; height: 168px; }
  .profile-photo-wrap { width: 152px; height: 152px; }
}