/* ============================================================
   al-folio faithful reproduction — Hamish Low demo
   ============================================================ */

/* --- Google Fonts (Inter) ---------------------------------- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&display=swap');

/* --- CSS Custom Properties (light mode) ------------------- */
:root {
  --bg:            #ffffff;
  --bg-alt:        #f8f9fa;
  --text:          #212529;
  --text-muted:    #6c757d;
  --accent:        #0891B2;
  --accent-hover:  #0E7490;
  --border:        #dee2e6;
  --nav-bg:        rgba(255, 255, 255, 0.97);
  --nav-height:    56px;
  --sidebar-w:     28%;
  --font:          'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --radius:        4px;
  --shadow:        0 2px 8px rgba(0,0,0,0.06);
}

/* --- Dark mode -------------------------------------------- */
[data-theme="dark"] {
  --bg:         #1a1a1a;
  --bg-alt:     #242424;
  --text:       #e8e8e8;
  --text-muted: #9a9a9a;
  --accent:     #22D3EE;
  --border:     #3a3a3a;
  --nav-bg:     rgba(26, 26, 26, 0.97);
  --shadow:     0 2px 8px rgba(0,0,0,0.3);
}

/* --- Reset & Base ----------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  padding-top: var(--nav-height);
  transition: background 0.2s, color 0.2s;
}

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

/* --- Navbar ----------------------------------------------- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  background: var(--nav-bg);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 100;
  display: flex;
  align-items: center;
  padding: 0 2rem;
  gap: 1.5rem;
}

.navbar-brand {
  font-weight: 600;
  font-size: 1rem;
  color: var(--text);
  white-space: nowrap;
  margin-right: auto;
}
.navbar-brand:hover { color: var(--accent); text-decoration: none; }

.navbar-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  list-style: none;
}

.navbar-links a {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-weight: 400;
  letter-spacing: 0.01em;
  text-transform: capitalize;
}
.navbar-links a:hover,
.navbar-links a.active { color: var(--accent); text-decoration: none; }

/* Dark mode toggle button */
.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  padding: 4px 8px;
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1;
  transition: border-color 0.15s, color 0.15s;
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); }

/* Hamburger (mobile) */
.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: background 0.15s;
}

/* --- Page wrapper ----------------------------------------- */
.page-container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 3rem 2rem 4rem;
}

/* --- Homepage: two-column layout -------------------------- */
.about-layout {
  display: flex;
  gap: 3.5rem;
  align-items: flex-start;
}

/* Sidebar */
.profile-sidebar {
  flex: 0 0 var(--sidebar-w);
  min-width: 200px;
  text-align: center;
}

.profile-photo {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--border);
  margin-bottom: 1.25rem;
  display: block;
  margin-left: auto;
  margin-right: auto;
}

/* Placeholder when no photo */
.profile-placeholder {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: var(--bg-alt);
  border: 3px solid var(--border);
  margin: 0 auto 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.75rem;
}

.profile-name {
  font-size: 1.35rem;
  font-weight: 600;
  margin-bottom: 0.3rem;
  color: var(--text);
}

.profile-title {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 0.2rem;
  font-weight: 400;
}

.profile-affil {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.15rem;
}

.profile-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 1rem auto;
  width: 60%;
}

/* Social icon links */
.social-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 0.75rem;
}

.social-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 3px 8px;
  transition: color 0.15s, border-color 0.15s;
}
.social-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
  text-decoration: none;
}

/* Bio content area */
.bio-content {
  flex: 1;
  min-width: 0;
}

.bio-content p {
  margin-bottom: 1rem;
  font-size: 0.95rem;
}

.bio-list {
  font-size: 0.95rem;
  padding-left: 1.2rem;
  margin-bottom: 1rem;
}
.bio-list li {
  margin-bottom: 0.6rem;
  padding-left: 0.2rem;
}

.bio-content h2 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 1.75rem 0 0.75rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* News list */
.news-list {
  list-style: none;
  font-size: 0.875rem;
}

.news-list li {
  display: flex;
  gap: 1rem;
  padding: 0.45rem 0;
  border-bottom: 1px solid var(--bg-alt);
  align-items: baseline;
}

.news-date {
  flex-shrink: 0;
  font-size: 0.78rem;
  color: var(--text-muted);
  min-width: 44px;
  font-variant-numeric: tabular-nums;
}

/* --- Research / Publications page ------------------------- */
.publications-header {
  margin-bottom: 2rem;
}

.publications-header h1 {
  font-size: 1.6rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.section-heading {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text);
  margin: 2.5rem 0 1rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid var(--accent);
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.pub-list {
  list-style: none;
}

.pub-entry {
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--border);
}
.pub-entry:last-child { border-bottom: none; }

.pub-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.25rem;
  line-height: 1.4;
}

.pub-authors {
  font-size: 0.855rem;
  color: var(--text-muted);
  margin-bottom: 0.2rem;
}

/* Highlight Hamish's name */
.pub-authors strong {
  color: var(--text);
  font-weight: 600;
}

.pub-venue {
  font-size: 0.855rem;
  color: var(--text-muted);
  font-style: italic;
  margin-bottom: 0.5rem;
}

.pub-status {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
  border-radius: 3px;
  padding: 1px 6px;
  margin-bottom: 0.5rem;
  margin-left: 0.4rem;
}

.pub-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
}

/* Compact one-line-per-paper list (earlier publications) */
.pub-compact {
  list-style: none;
  font-size: 0.855rem;
}
.pub-compact li {
  display: flex;
  gap: 1rem;
  padding: 0.45rem 0;
  border-bottom: 1px solid var(--bg-alt);
  align-items: baseline;
}
.pub-compact li:last-child { border-bottom: none; }
.pub-compact .pub-year {
  flex-shrink: 0;
  min-width: 2.6rem;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}
.pub-compact .pub-cite { color: var(--text-muted); }
.pub-compact .pub-cite a { color: var(--text); font-weight: 500; }
.pub-compact .pub-cite a:hover { color: var(--accent); }

.btn-pill {
  display: inline-block;
  font-size: 0.775rem;
  font-weight: 500;
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 2px 9px;
  color: var(--text-muted);
  cursor: pointer;
  background: none;
  font-family: var(--font);
  transition: color 0.15s, border-color 0.15s, background 0.15s;
  text-decoration: none;
  line-height: 1.6;
}
.btn-pill:hover {
  color: var(--accent);
  border-color: var(--accent);
  text-decoration: none;
}
.btn-pill.abstract-toggle { cursor: pointer; }
.btn-pill.abstract-toggle.open {
  color: var(--accent);
  border-color: var(--accent);
}

.abstract-body {
  margin-top: 0.75rem;
  font-size: 0.855rem;
  color: var(--text-muted);
  line-height: 1.6;
  background: var(--bg-alt);
  border-left: 3px solid var(--accent);
  padding: 0.75rem 1rem;
  border-radius: 0 var(--radius) var(--radius) 0;
}

/* --- CV page ---------------------------------------------- */
.cv-page h1 {
  font-size: 1.6rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.cv-download-box {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem 2rem;
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.cv-download-box p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.btn-primary {
  display: inline-block;
  background: var(--accent);
  color: #fff !important;
  border: none;
  border-radius: var(--radius);
  padding: 8px 18px;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s;
  white-space: nowrap;
}
.btn-primary:hover { background: var(--accent-hover); text-decoration: none !important; }

/* CV download link */
.cv-download {
  margin-bottom: 1.5rem;
}

/* PhD topic cards */
.topic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
  margin-top: 0.5rem;
}

.topic-card {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
}

.topic-card h3 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
  color: var(--text);
}

.topic-card p {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin: 0;
}

/* CV section rows */
.cv-section {
  margin-bottom: 2.5rem;
}

.cv-section h2 {
  font-size: 1.05rem;
  font-weight: 600;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.4rem;
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.cv-row {
  display: flex;
  gap: 1.5rem;
  padding: 0.5rem 0;
  font-size: 0.9rem;
}

.cv-row-year {
  flex-shrink: 0;
  min-width: 100px;
  color: var(--text-muted);
  font-size: 0.85rem;
  padding-top: 1px;
}

/* Position/role titles in CV rows — displayed as their own line */
.cv-role {
  display: block;
  font-weight: 600;
}

/* Author name highlights — stay inline and don't break mid-name */
.cv-row-body strong,
.pub-authors strong {
  white-space: nowrap;
  font-weight: 600;
}

/* --- Chicago Fed seal ------------------------------------- */
.chicago-fed-seal {
  display: block;
  width: 72px;
  margin: 0.75rem auto 0;
  opacity: 0.85;
}

/* --- Footer ----------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 2rem;
  text-align: center;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 4rem;
}

.footer-disclaimer {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

.footer-meta {
  font-size: 0.72rem;
  color: var(--text-muted);
  opacity: 0.7;
}

/* --- Disabled pill button --------------------------------- */
.btn-pill--disabled {
  opacity: 0.4;
  cursor: default;
  pointer-events: none;
}

/* --- Responsive ------------------------------------------- */
@media (max-width: 680px) {
  .navbar { padding: 0 1rem; gap: 0.75rem; }
  .navbar-links { display: none; flex-direction: column; position: fixed;
    top: var(--nav-height); left: 0; right: 0; background: var(--nav-bg);
    border-bottom: 1px solid var(--border); padding: 1rem 1.5rem; gap: 0.75rem;
    z-index: 99; }
  .navbar-links.open { display: flex; }
  .hamburger { display: flex; }
  .page-container { padding: 2rem 1.25rem 3rem; }
  .about-layout { flex-direction: column; gap: 2rem; }
  .profile-sidebar { width: 100%; flex: unset; }
  .profile-photo, .profile-placeholder { width: 140px; height: 140px; }
  .cv-download-box { flex-direction: column; align-items: flex-start; }
  .cv-row { flex-direction: column; gap: 0.2rem; }
  .cv-row-year { min-width: unset; }
}