/* ============================================================
   Sangyu Xu Portfolio — Whimsy Theme
   Edward Tufte meets Studio Ghibli
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Crimson+Pro:ital,wght@0,400;0,600;1,400&family=Caveat:wght@400;700&family=Inter:wght@300;400;500;600&family=Noto+Serif+SC:wght@400;600&display=swap');

/* === Design tokens === */
:root {
  --cream: #F7F2E8;
  --warm-grey: #8B8478;
  --ochre: #C8A96E;
  --ink-blue: #2C4A6E;
  --coral: #D4735A;
  --verdigris: #5B8A7A;
  --dark-ink: #1A1A2E;
  --paper: #FDFAF5;

  --shadow-warm: 0 4px 24px rgba(44, 74, 110, 0.09);
  --shadow-warm-hover: 0 8px 40px rgba(44, 74, 110, 0.16);
  --radius: 10px;
  --radius-lg: 18px;
  --transition: 0.28s cubic-bezier(0.34, 1.06, 0.64, 1);
}

/* === Base === */

body {
  background-color: var(--paper);
  font-family: 'Crimson Pro', Georgia, 'Times New Roman', serif;
  font-size: 1.15rem;
  line-height: 1.75;
  color: var(--dark-ink);
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Crimson Pro', Georgia, serif;
  color: var(--ink-blue);
  font-weight: 600;
  line-height: 1.25;
}

p { margin-bottom: 1.1rem; }

a {
  color: var(--coral);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover { color: var(--verdigris); }

strong { color: var(--ink-blue); }

em { color: var(--dark-ink); }

/* === Navbar — override Bootstrap dark-theme vars explicitly === */

.navbar,
.navbar[data-bs-theme="dark"],
.navbar[data-bs-theme="light"] {
  background-color: var(--cream) !important;
  border-bottom: 1px solid rgba(139, 132, 120, 0.22);
  padding: 0.6rem 1.5rem;
  /* Reset Bootstrap's dark navbar CSS variables */
  --bs-navbar-color: var(--ink-blue);
  --bs-navbar-hover-color: var(--coral);
  --bs-navbar-brand-color: var(--ink-blue);
  --bs-navbar-brand-hover-color: var(--coral);
  --bs-navbar-active-color: var(--coral);
  --bs-navbar-toggler-border-color: rgba(44, 74, 110, 0.2);
  --bs-navbar-toggler-icon-bg: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%232C4A6E' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

.navbar-brand,
.navbar-brand:hover {
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: 1.2rem;
  color: var(--ink-blue) !important;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.navbar .nav-link {
  font-family: 'Inter', sans-serif;
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--ink-blue) !important;
  padding: 0.4rem 0.9rem !important;
  border-radius: 6px;
  transition: background 0.2s ease, color 0.2s ease;
}

.navbar .nav-link:hover {
  color: var(--coral) !important;
  background: rgba(212, 115, 90, 0.07);
}

/* === Hero Section === */

.hero {
  padding: 5.5rem 2rem 4.5rem;
  text-align: center;
  background: var(--paper);
  position: relative;
  overflow: hidden;
}


.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 820px;
  margin: 0 auto;
}

.hero-name {
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: clamp(2.8rem, 7vw, 5rem);
  font-weight: 600;
  color: var(--ink-blue);
  letter-spacing: -0.015em;
  margin: 0 0 0.1rem;
  line-height: 1.05;
}

.hero-chinese {
  font-family: 'Noto Serif SC', 'Source Han Serif SC', serif;
  font-size: clamp(1.8rem, 4.5vw, 3rem);
  color: var(--ochre);
  margin: 0 0 1.2rem;
  letter-spacing: 0.18em;
  display: block;
}

.hero-tagline {
  font-family: 'Inter', sans-serif;
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--warm-grey);
  margin-bottom: 1.6rem;
}

.hero-one-liner {
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: clamp(1.15rem, 2.8vw, 1.55rem);
  font-style: italic;
  color: var(--dark-ink);
  max-width: 680px;
  margin: 0 auto 2.8rem;
  line-height: 1.6;
}

.hero-badges {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  height: 2.2rem;
  padding: 0 1.1rem;
  border: 1.5px solid rgba(200, 169, 110, 0.6);
  border-radius: 100px;
  font-family: 'Inter', sans-serif;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--ink-blue);
  background: rgba(200, 169, 110, 0.07);
  transition: all var(--transition);
}

.hero-badge:hover {
  background: rgba(200, 169, 110, 0.18);
  border-color: var(--ochre);
  transform: translateY(-3px);
  color: var(--ink-blue);
}

.badge-icon {
  height: 1em;
  width: auto;
  display: block;
}

/* Drosophila decorations */
.fly-deco {
  position: absolute;
  font-size: 2rem;
  opacity: 0.055;
  user-select: none;
  pointer-events: none;
  animation: drift 10s ease-in-out infinite;
}

.fly-deco:nth-child(2) { animation-delay: -3s; animation-duration: 13s; }
.fly-deco:nth-child(3) { animation-delay: -7s; animation-duration: 9s; }

@keyframes drift {
  0%, 100% { transform: translateY(0px) rotate(-8deg) scale(1); }
  33%  { transform: translateY(-14px) rotate(4deg) scale(1.05); }
  66%  { transform: translateY(-6px) rotate(-3deg) scale(0.97); }
}

/* === About section === */

.headshot {
  display: block;
  width: 130px;
  height: 130px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center top;
  margin: 0 auto 1.4rem;
  box-shadow: 0 4px 20px rgba(44, 74, 110, 0.15);
  border: 3px solid var(--cream);
}

.about-section {
  max-width: 740px;
  margin: 3rem auto 1rem;
  padding: 0 1.5rem;
  font-size: 1.18rem;
  line-height: 1.8;
  text-align: center;
  color: var(--dark-ink);
}

/* === News section === */
.news-section {
  max-width: 740px;
  margin: 2.5rem auto 0.5rem;
  padding: 0 1.5rem;
}

.news-title {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--warm-grey);
  margin-bottom: 0.9rem;
}

.news-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.news-list li {
  font-size: 1rem;
  line-height: 1.65;
  padding: 0.45rem 0;
  border-bottom: 1px solid rgba(200, 169, 110, 0.2);
  color: var(--dark-ink);
}

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

.news-date {
  display: inline-block;
  min-width: 5.5rem;
  font-size: 0.82rem;
  color: var(--warm-grey);
  font-variant-numeric: tabular-nums;
  margin-right: 0.5rem;
}

/* === Section divider === */

.section-divider {
  text-align: center;
  padding: 2.5rem 0 1.5rem;
  color: var(--ochre);
  opacity: 0.5;
  letter-spacing: 0.6rem;
  font-size: 1rem;
}

/* === Feature Cards === */

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 2rem;
  max-width: 1080px;
  margin: 0 auto 4rem;
  padding: 1rem 2rem 2rem;
}

.feature-card {
  background: var(--cream);
  border-radius: var(--radius-lg);
  padding: 2.2rem 2rem 1.8rem;
  box-shadow: var(--shadow-warm);
  transition: transform var(--transition), box-shadow var(--transition);
  border: 1px solid rgba(139, 132, 120, 0.14);
  position: relative;
  overflow: hidden;
}

.feature-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--coral), var(--ochre));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s ease;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-warm-hover);
}

.feature-card:hover::after { transform: scaleX(1); }

.card-icon {
  font-size: 2.2rem;
  display: block;
  margin-bottom: 0.9rem;
}
.card-icon-svg {
  height: 4rem;
  width: auto;
  display: block;
  margin-bottom: 0.9rem;
}

.card-title {
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: 1.45rem;
  font-weight: 600;
  color: var(--ink-blue);
  margin: 0 0 0.7rem;
}

.card-text {
  font-size: 0.98rem;
  color: var(--dark-ink);
  line-height: 1.72;
  margin-bottom: 1.4rem;
}

.card-link {
  font-family: 'Inter', sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--coral);
  letter-spacing: 0.05em;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  transition: gap 0.2s ease, color 0.2s ease;
}

.card-link:hover {
  gap: 0.65rem;
  color: var(--verdigris);
}

/* === Research grid === */

.research-intro {
  max-width: 700px;
  margin: 1.5rem auto 2.5rem;
  padding: 0 1.5rem;
  font-size: 1.15rem;
  text-align: center;
  color: var(--warm-grey);
  font-style: italic;
}

.research-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
  gap: 1.5rem;
  max-width: 1080px;
  margin: 0 auto 3rem;
  padding: 0 1.5rem;
}

.research-card {
  background: var(--cream);
  border-radius: var(--radius);
  padding: 1.6rem 2rem;
  box-shadow: var(--shadow-warm);
  border-left: 4px solid var(--verdigris);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.research-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-warm-hover);
}

.research-card.stub {
  border-left-color: var(--warm-grey);
  opacity: 0.65;
}

.research-card h3 {
  font-size: 1.2rem;
  margin: 0 0 0.35rem;
  color: var(--ink-blue);
}

.output-tag {
  font-family: 'Inter', sans-serif;
  font-size: 0.72rem;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--verdigris);
  font-weight: 600;
  margin-bottom: 0.65rem;
  display: block;
}

.research-card.stub .output-tag { color: var(--warm-grey); }

.research-card p {
  font-size: 0.95rem;
  color: var(--dark-ink);
  margin-bottom: 1rem;
  line-height: 1.65;
}

.research-card a {
  font-family: 'Inter', sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--coral);
  letter-spacing: 0.04em;
}

.research-card a:hover { color: var(--verdigris); }

/* === Art page === */

.art-intro {
  max-width: 720px;
  margin: 1.5rem auto 2.5rem;
  padding: 0 1.5rem;
  text-align: center;
}

.art-section {
  max-width: 1000px;
  margin: 0 auto 3rem;
  padding: 0 1.5rem;
}

.art-section h2 {
  font-size: 1.8rem;
  color: var(--ink-blue);
  border-bottom: 2px solid rgba(200, 169, 110, 0.35);
  padding-bottom: 0.5rem;
  margin-bottom: 0.6rem;
}

.art-section .art-meta {
  font-family: 'Inter', sans-serif;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--warm-grey);
  margin-bottom: 1.5rem;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 1.8rem;
  margin: 1.5rem 0 1rem;
}

.gallery-item {
  background: var(--paper);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-warm);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.gallery-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-warm-hover);
}

.gallery-placeholder {
  aspect-ratio: 3/4;
  background: linear-gradient(145deg, var(--cream) 0%, rgba(200, 169, 110, 0.12) 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-family: 'Caveat', cursive;
  color: var(--warm-grey);
  font-size: 1rem;
  padding: 1.5rem;
  text-align: center;
  border: 1px solid rgba(200, 169, 110, 0.25);
  position: relative;
}

.gallery-placeholder::before {
  content: '○';
  font-size: 2.5rem;
  color: rgba(200, 169, 110, 0.3);
  display: block;
  margin-bottom: 0.5rem;
  font-family: serif;
}

.gallery-link {
  display: block;
  overflow: hidden;
}

.gallery-item img {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: cover;
  display: block;
  transition: transform 0.35s ease;
}

.gallery-link:hover img {
  transform: scale(1.04);
}

.gallery-caption {
  padding: 0.7rem 1rem;
  font-size: 0.82rem;
  color: var(--warm-grey);
  font-family: 'Inter', sans-serif;
  border-top: 1px solid rgba(139, 132, 120, 0.1);
}

.music-block {
  background: linear-gradient(135deg, var(--cream), rgba(200, 169, 110, 0.18));
  border-radius: var(--radius-lg);
  padding: 2.5rem 2.5rem 2rem;
  text-align: center;
  border: 1px solid rgba(200, 169, 110, 0.25);
  margin: 1.5rem 0;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.music-block .award-label {
  font-family: 'Inter', sans-serif;
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--ochre);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.music-block h3 {
  font-size: 1.4rem;
  color: var(--ink-blue);
  margin: 0.3rem 0 0.5rem;
}

.music-block p {
  color: var(--warm-grey);
  font-size: 0.95rem;
  margin: 0;
}

.tufte-note {
  background: var(--cream);
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--ochre);
  padding: 1.8rem 2rem;
  margin: 2.5rem auto;
  max-width: 680px;
  font-size: 1.05rem;
  font-style: italic;
  line-height: 1.75;
  color: var(--dark-ink);
  box-shadow: var(--shadow-warm);
}

/* === CV page === */

.cv-wrapper {
  max-width: 820px;
  margin: 0 auto;
  padding: 1rem 2rem 3rem;
}

.cv-profile {
  background: var(--cream);
  border-radius: var(--radius-lg);
  padding: 1.8rem 2.2rem;
  margin: 1.5rem 0 2.5rem;
  font-size: 1.1rem;
  line-height: 1.78;
  border: 1px solid rgba(139, 132, 120, 0.15);
  box-shadow: var(--shadow-warm);
}

.cv-section-title {
  font-size: 1.3rem;
  color: var(--ink-blue);
  border-bottom: 2px solid rgba(200, 169, 110, 0.4);
  padding-bottom: 0.4rem;
  margin-top: 2.5rem;
  margin-bottom: 1.2rem;
  letter-spacing: 0.02em;
}
.cv-external-link {
  font-size: 0.75rem;
  font-family: 'Inter', sans-serif;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--coral);
  text-decoration: none;
  margin-left: 0.75rem;
  vertical-align: middle;
}
.cv-external-link:hover { text-decoration: underline; }

.cv-pub {
  margin-bottom: 1.1rem;
  padding-left: 1.3rem;
  border-left: 2.5px solid rgba(200, 169, 110, 0.5);
  font-size: 1rem;
  line-height: 1.65;
}

.cv-pub em { color: var(--verdigris); font-style: italic; }

.cv-entry {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 0.9rem;
}

.cv-entry-main { font-weight: 600; color: var(--dark-ink); }

.cv-entry-date {
  font-family: 'Inter', sans-serif;
  font-size: 0.82rem;
  color: var(--warm-grey);
  white-space: nowrap;
}

.skills-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0.8rem 0 1.5rem;
}

.skill-tag {
  background: rgba(200, 169, 110, 0.1);
  border: 1px solid rgba(200, 169, 110, 0.38);
  border-radius: 100px;
  padding: 0.22rem 0.8rem;
  font-family: 'Inter', sans-serif;
  font-size: 0.78rem;
  color: var(--dark-ink);
  letter-spacing: 0.02em;
}

.award-item {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  margin-bottom: 0.75rem;
  font-size: 1rem;
}

.award-item::before {
  content: '✦';
  color: var(--ochre);
  font-size: 0.7rem;
  flex-shrink: 0;
}

.cv-teaching-item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.3rem;
  margin-bottom: 0.6rem;
  font-size: 0.95rem;
}

.cv-media-item {
  margin-bottom: 0.75rem;
  font-size: 0.97rem;
  line-height: 1.6;
  padding-left: 1.3rem;
  border-left: 2.5px solid rgba(200, 169, 110, 0.5);
}

.pub-fig-link { display: block; margin-top: 2rem; }
.pub-fig {
  max-width: 480px;
  width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow-warm);
  transition: box-shadow 0.25s ease;
}
.pub-fig:hover { box-shadow: var(--shadow-warm-hover); }

/* === Blog === */

.blog-intro {
  max-width: 680px;
  margin: 0 auto 2.5rem;
  padding: 0 1.5rem;
  text-align: center;
  color: var(--warm-grey);
  font-style: italic;
}

.blog-stub {
  background: var(--cream);
  border-radius: var(--radius);
  padding: 1.5rem 2rem;
  margin-bottom: 1.4rem;
  border: 1px solid rgba(139, 132, 120, 0.14);
  box-shadow: var(--shadow-warm);
  transition: transform 0.22s ease, box-shadow 0.22s ease;
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
}

.blog-stub:hover {
  transform: translateX(5px);
  box-shadow: var(--shadow-warm-hover);
}

.blog-stub h3 {
  font-size: 1.25rem;
  margin: 0 0 0.4rem;
  color: var(--ink-blue);
}

.blog-stub p {
  color: var(--warm-grey);
  font-size: 0.95rem;
  margin: 0;
  line-height: 1.6;
}

.coming-soon-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  text-align: center;
}
.coming-soon-inner {
  max-width: 480px;
  padding: 2rem;
}
.coming-soon-icon {
  font-size: 3.5rem;
  display: block;
  margin-bottom: 1.2rem;
}
.coming-soon-inner h1 {
  font-size: 2rem;
  color: var(--ink-blue);
  margin-bottom: 0.7rem;
}
.coming-soon-sub {
  font-size: 1.05rem;
  color: var(--warm-grey);
  margin-bottom: 1.5rem;
}
.coming-soon-note {
  font-style: italic;
  color: var(--ochre);
  font-size: 0.95rem;
}

.coming-soon-tag {
  display: inline-block;
  font-family: 'Inter', sans-serif;
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ochre);
  background: rgba(200, 169, 110, 0.1);
  border: 1px solid rgba(200, 169, 110, 0.3);
  border-radius: 100px;
  padding: 0.15rem 0.6rem;
  margin-bottom: 0.6rem;
}

/* === Page-level utilities === */

.page-header {
  text-align: center;
  padding: 3.5rem 2rem 1.5rem;
  max-width: 820px;
  margin: 0 auto;
}

.page-header h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  margin-bottom: 0.8rem;
}

.page-header .subtitle {
  font-size: 1.15rem;
  font-style: italic;
  color: var(--warm-grey);
}

.handwritten { font-family: 'Caveat', cursive; color: var(--ochre); }

/* === Code cells === */

.cell { margin-bottom: 1.5rem; }

.cell > .sourceCode {
  border-radius: var(--radius);
  border: 1px solid rgba(139, 132, 120, 0.18);
  background: var(--cream) !important;
}

pre.sourceCode { background: var(--cream) !important; }

.cell-output > pre,
.cell-output > .sourceCode > pre,
.cell-output-stdout > pre {
  margin-left: 0;
  margin-top: 0;
  background: rgba(91, 138, 122, 0.05) !important;
  border-left: 3px solid var(--verdigris);
  border-top-left-radius: 0;
  border-top-right-radius: 0;
  border-radius: 0 0 var(--radius) var(--radius);
  padding: 1rem;
}

.cell-output > .sourceCode { border: none; background: none; }

/* === Figures === */

figure { margin: 2rem 0; text-align: center; }

figure img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-warm);
  max-width: 100%;
}

figcaption {
  font-size: 0.88rem;
  color: var(--warm-grey);
  font-style: italic;
  margin-top: 0.75rem;
  font-family: 'Inter', sans-serif;
}

/* === Layout === */

#quarto-content { padding-top: 0; }
.page-full .column-body { max-width: none; }
#title-block-header { display: none; }
.hero-badges p { margin: 0; display: contents; }

/* === Callouts === */

.callout {
  border-radius: var(--radius);
  border-color: var(--verdigris);
}

/* === ITC page specific === */

.itc-highlight {
  background: var(--cream);
  border-radius: var(--radius-lg);
  padding: 2rem 2.5rem;
  margin: 2rem 0;
  border: 1px solid rgba(139, 132, 120, 0.15);
  box-shadow: var(--shadow-warm);
}

/* === Responsive === */

@media (max-width: 768px) {
  .hero { padding: 3.5rem 1.5rem 3rem; }
  .cards-grid { grid-template-columns: 1fr; padding: 1rem 1.5rem; }
  .hero-badges { gap: 0.65rem; }
  .cv-entry { flex-direction: column; gap: 0.15rem; }
  .gallery-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
  .music-block { padding: 1.8rem 1.5rem; }
  .tufte-note { padding: 1.5rem; }
}

@media print {
  .navbar { display: none; }
  body { background: white; }
  .feature-card, .research-card, .blog-stub { box-shadow: none; border: 1px solid #ddd; }
}