/* ============================================
   Shaw Lab — main stylesheet
   Clean academic style
   ============================================ */

:root {
  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-text-muted: #555555;
  --color-accent: #2a5caa;
  --color-accent-hover: #1a3f7a;
  --color-border: #e0e0e0;
  --color-surface: #f7f7f7;
  --font-body: 'Source Serif 4', Georgia, serif;
  --font-ui: 'IBM Plex Sans', system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
  --max-width: 860px;
  --nav-height: 60px;
}

/* ---- Reset & base ---- */

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

html { font-size: 18px; scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
}

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

a:hover { color: var(--color-accent-hover); text-decoration: underline; }

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

/* ---- Layout ---- */

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ---- Header / nav ---- */

.site-header {
  border-bottom: 1px solid var(--color-border);
  height: var(--nav-height);
  display: flex;
  align-items: center;
  position: sticky;
  top: 0;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(6px);
  z-index: 100;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.site-title {
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--color-text);
  letter-spacing: -0.01em;
  text-decoration: none;
}

.site-title:hover { color: var(--color-accent); text-decoration: none; }

.site-nav {
  display: flex;
  gap: 1.75rem;
  align-items: center;
}

.site-nav a {
  font-family: var(--font-ui);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color 0.15s;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--color-accent);
  text-decoration: none;
}

/* ---- Main ---- */

.site-main {
  min-height: calc(100vh - var(--nav-height) - 80px);
  padding: 3rem 0 5rem;
}

/* ---- Hero (home page) ---- */

.hero {
  padding: 3rem 0 2rem;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 3rem;
}

.hero h1 {
  font-family: var(--font-body);
  font-size: 2.4rem;
  font-weight: 300;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.tagline {
  font-family: var(--font-ui);
  font-size: 0.9rem;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

/* ---- Home intro ---- */

.home-intro {
  margin-bottom: 3rem;
  max-width: 680px;
}

.home-intro p { margin-bottom: 1rem; }

/* ---- Highlight grid ---- */

.home-highlights { margin-bottom: 4rem; }

.highlight-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 1.5rem;
}

.highlight-card {
  border-top: 2px solid var(--color-accent);
  padding-top: 1rem;
}

.highlight-card h3 {
  font-family: var(--font-ui);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.highlight-card h3 a {
  color: var(--color-text);
  text-decoration: none;
}

.highlight-card p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
  line-height: 1.6;
}

.read-more {
  font-family: var(--font-ui);
  font-size: 0.85rem;
  font-weight: 500;
}

/* ---- Blog previews (home) ---- */

.home-blog h2 {
  font-family: var(--font-ui);
  font-size: 1rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-border);
}

.blog-preview {
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--color-border);
}

.blog-preview:last-child { border-bottom: none; }

.blog-preview h3 { font-size: 1.1rem; margin-bottom: 0.25rem; }
.blog-preview time {
  font-family: var(--font-ui);
  font-size: 0.8rem;
  color: var(--color-text-muted);
  display: block;
  margin-bottom: 0.5rem;
}
.blog-preview p { font-size: 0.95rem; margin-bottom: 0.5rem; }

/* ---- Page layout ---- */

.page-header {
  padding-bottom: 1.5rem;
  margin-bottom: 2.5rem;
  border-bottom: 1px solid var(--color-border);
}

.page-header h1 {
  font-size: 2rem;
  font-weight: 300;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.subtitle {
  color: var(--color-text-muted);
  font-style: italic;
}

.page-intro {
  max-width: 680px;
  margin-bottom: 2rem;
}

/* ---- Page content (markdown) ---- */

.page-content h2 {
  font-size: 1.3rem;
  font-weight: 600;
  margin: 2rem 0 0.75rem;
}

.page-content h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 1.5rem 0 0.5rem;
}

.page-content p { margin-bottom: 1rem; }

.page-content ul,
.page-content ol {
  margin: 0.5rem 0 1rem 0;
  padding-left: 1.5rem;
}

.page-intro ul,
.page-intro ol {
  padding-left: 1.5rem;
}


.page-content li { margin-bottom: 0.25rem; }

.page-content code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--color-surface);
  padding: 0.1em 0.35em;
  border-radius: 3px;
}

.page-content pre {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 1rem;
  overflow-x: auto;
  margin: 1rem 0;
}

.page-content pre code { background: none; padding: 0; }


/* ---- Publications ---- */

.pub-year-group { margin-bottom: 3rem; }

.pub-year {
  font-family: var(--font-ui);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-border);
}

.pub-item {
  margin-bottom: 1.75rem;
  padding-bottom: 1.75rem;
  border-bottom: 1px solid var(--color-border);
}

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

.pub-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
  line-height: 1.4;
}

.pub-authors {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: 0.2rem;
}

.pub-journal {
  font-size: 0.875rem;
  margin-bottom: 0.5rem;
}

.pub-links {
  display: flex;
  gap: 0.75rem;
}

.pub-links a {
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 500;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 0.15rem 0.6rem;
  border-radius: 3px;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: border-color 0.15s, color 0.15s;
}

.pub-links a:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  text-decoration: none;
}

/* ---- Blog post list ---- */

.post-list { }

.post-item {
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--color-border);
}

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

.post-item h2 { font-size: 1.2rem; margin-bottom: 0.2rem; }

.post-item time {
  font-family: var(--font-ui);
  font-size: 0.8rem;
  color: var(--color-text-muted);
  display: block;
  margin-bottom: 0.5rem;
}

.author {
  font-family: var(--font-ui);
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-left: 0.5rem;
}

/* ---- Footer ---- */

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 1.5rem 0;
  font-family: var(--font-ui);
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* ---- Responsive ---- */

@media (max-width: 700px) {
  html { font-size: 16px; }

  .highlight-grid { grid-template-columns: 1fr; gap: 1.5rem; }

  .people-grid { grid-template-columns: 1fr; }

  .site-nav { gap: 1rem; }
  .site-nav a { font-size: 0.8rem; }

  .hero h1 { font-size: 1.8rem; }
}
.page p { margin-bottom: 1rem; }

.page-content blockquote,
.page-intro blockquote {
  border-left: 3px solid var(--color-accent);
  margin: 0 0 1.5rem 0;
  padding: 0.25rem 0 0.25rem 1.25rem;
  color: var(--color-text-muted);
  font-style: italic;
}

.hero {
  padding: 1rem 0 1rem;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 3rem;
  background-image: url('/images/Kandinsky1926-several-circles.jpg');
  background-size: cover;
  background-position: center;
  padding: 5rem 1.5rem;
  margin-left: calc(-50vw + 50%);  /* break out of container */
  margin-right: calc(-50vw + 50%);
  padding-left: calc(50vw - 50% + 1.5rem);
  padding-right: calc(50vw - 50% + 1.5rem);
}

.hero {
  /* ...background properties... */
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.3); /* white wash */
}

.hero h1, .hero .tagline {
  position: relative; /* sit above the overlay */
  z-index: 1;
}

.tagline {
  font-family: var(--font-ui);
  font-size: 0.9rem;
  color: #ffffff;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.page-header.has-bg {
  background-size: cover;
  background-position: center;
  padding: 4rem 0;
  position: relative;
}

.page-header.has-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
}

.page-header.has-bg h1,
.page-header.has-bg .subtitle {
  position: relative;
  z-index: 1;
  color: #ffffff;
}