/* =========================================================
   franciscomaion.com — custom stylesheet
   ========================================================= */

/* ----- Variables ---------------------------------------- */
:root {
  --accent:       #6366f1;
  --accent-dark:  #4f46e5;
  --accent-light: #eef2ff;
  --text:         #0f172a;
  --text-muted:   #64748b;
  --border:       #e2e8f0;
  --bg:           #ffffff;
  --bg-alt:       #f8fafc;
  --nav-h:        68px;
  --font:         'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --radius:       8px;
  --max-w:        860px;
}

/* ----- Reset -------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-decoration: none; }

/* ----- Navigation --------------------------------------- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 200;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  height: var(--nav-h);
}

.nav-inner {
  max-width: calc(var(--max-w) + 4rem);
  margin: 0 auto;
  padding: 0 2rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.nav-brand {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
  white-space: nowrap;
  flex-shrink: 0;
}
.nav-brand span { color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  list-style: none;
}

.nav-links a {
  display: block;
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color 0.15s, background 0.15s;
  white-space: nowrap;
}

.nav-links a:hover  { color: var(--accent); background: var(--accent-light); }
.nav-links a.active { color: var(--accent); background: var(--accent-light); font-weight: 600; }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text);
  padding: 0.5rem;
  font-size: 1.2rem;
  line-height: 1;
}

/* ----- Hero (homepage) ---------------------------------- */
.hero {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 5rem 2rem;
  background: linear-gradient(160deg, #f0f4ff 0%, #faf5ff 55%, #f0f9ff 100%);
}

.hero-layout {
  display: flex;
  align-items: center;
  gap: 4rem;
  max-width: 820px;
  width: 100%;
}

/* Circular photo */
.hero-photo { flex-shrink: 0; }

.hero-photo img {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center top;
  box-shadow: 0 0 0 5px #fff, 0 0 0 9px var(--accent-light), 0 12px 40px rgba(99,102,241,0.15);
}

/* Text side */
.hero-inner { flex: 1; }

.hero-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-light);
  padding: 0.3rem 0.9rem;
  border-radius: 99px;
  margin-bottom: 1.25rem;
}

.hero-title {
  font-size: clamp(1.9rem, 4.5vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.025em;
  color: var(--text);
  margin-bottom: 1rem;
}
.hero-title span { color: var(--accent); }

.hero-sub {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.hero-loc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* ----- Buttons ------------------------------------------ */
.btn {
  display: inline-block;
  padding: 0.65rem 1.6rem;
  border-radius: 99px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
  line-height: 1.5;
}

.btn-primary,
a.btn-primary,
.page-content a.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.btn-primary:hover,
a.btn-primary:hover,
.page-content a.btn-primary:hover { background: var(--accent-dark); border-color: var(--accent-dark); color: #fff; }

.btn-outline {
  background: transparent;
  border-color: var(--accent);
  color: var(--accent);
}
.btn-outline:hover { background: var(--accent-light); }

/* my-2 used by button shortcode */
.my-2 { margin-top: 0.5rem; margin-bottom: 0.5rem; }

/* rounded-pill used by button shortcode (already covered by btn border-radius) */
.rounded-pill { border-radius: 99px !important; }

/* ----- Page layout -------------------------------------- */
main { flex: 1; }

.page-wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 3.5rem 2rem 5rem;
}

.page-header { margin-bottom: 2.5rem; }

.page-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.025em;
  line-height: 1.2;
}

.page-title::after {
  content: '';
  display: block;
  width: 2.75rem;
  height: 4px;
  background: var(--accent);
  border-radius: 2px;
  margin-top: 0.75rem;
}

/* ----- Content typography ------------------------------- */
.page-content p { margin-bottom: 1rem; }

.page-content h2 {
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--text);
  margin: 2.25rem 0 0.75rem;
  letter-spacing: -0.015em;
}

.page-content h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
  margin: 1.75rem 0 0.5rem;
}

.page-content a {
  color: var(--accent);
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s;
}
.page-content a:hover { border-bottom-color: var(--accent); }

.page-content ul,
.page-content ol { padding-left: 1.5rem; margin-bottom: 1rem; }
.page-content li  { margin-bottom: 0.3rem; }

.page-content strong { font-weight: 600; }

.page-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 1.25rem 0;
}

.page-content blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 1rem;
  color: var(--text-muted);
  margin: 1.5rem 0;
}

.page-content iframe {
  border-radius: var(--radius);
  width: 100%;
}

/* ----- Two-column split (about page) -------------------- */
.split-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

/* ----- Contact cards ------------------------------------ */
.contact-card {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 1.5rem;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.1rem 1.25rem;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.contact-icon {
  color: var(--accent);
  font-size: 1.15rem;
  width: 1.5rem;
  text-align: center;
  flex-shrink: 0;
}

.contact-label {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-muted);
  line-height: 1;
  margin-bottom: 0.2rem;
}

.contact-value { font-size: 0.97rem; font-weight: 500; color: var(--text); }
.contact-value a { color: var(--accent); }

/* ----- Publications ------------------------------------- */
.pub-intro {
  color: var(--text-muted);
  margin-bottom: 2rem;
  font-size: 0.97rem;
}

.pub-list {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.pub-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  overflow: hidden;
  transition: box-shadow 0.15s, border-color 0.15s;
}
.pub-card[open] {
  border-color: var(--accent-light);
  box-shadow: 0 4px 24px rgba(99,102,241,0.09);
}

.pub-summary {
  padding: 1.1rem 1.4rem;
  cursor: pointer;
  list-style: none;
  user-select: none;
}
.pub-summary::-webkit-details-marker { display: none; }
.pub-summary::marker { display: none; }
.pub-summary:hover { background: var(--bg-alt); }

.pub-meta-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.45rem;
  flex-wrap: wrap;
}

.pub-year {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-light);
  padding: 0.18rem 0.55rem;
  border-radius: 4px;
  flex-shrink: 0;
}

.pub-journal {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-style: italic;
}

.pub-expand {
  margin-left: auto;
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.3rem;
  flex-shrink: 0;
}
.pub-card[open] .pub-expand-icon { transform: rotate(180deg); }
.pub-expand-icon { transition: transform 0.2s; display: inline-block; }

.pub-title {
  font-size: 0.97rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
  margin: 0 0 0.3rem;
}

.pub-authors {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin: 0;
}
.pub-authors strong { color: var(--text); font-weight: 600; }

.pub-body {
  padding: 1.1rem 1.4rem;
  border-top: 1px solid var(--border);
  background: var(--bg-alt);
}

.pub-body p { font-size: 0.92rem; color: var(--text); margin-bottom: 0.75rem; }
.pub-body p:last-child { margin-bottom: 0; }

.pub-links {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.pub-link {
  display: inline-block;
  padding: 0.28rem 0.85rem;
  border-radius: 99px;
  font-size: 0.78rem;
  font-weight: 600;
  border: 1.5px solid var(--accent);
  color: var(--accent);
  transition: background 0.15s, color 0.15s;
}
.pub-link:hover { background: var(--accent); color: #fff; border-bottom: none; }

/* ----- Footer ------------------------------------------- */
.site-footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding: 1.75rem 2rem;
  text-align: center;
  font-size: 0.83rem;
  color: var(--text-muted);
}

.footer-social {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  margin-bottom: 0.6rem;
}

.footer-social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 50%;
  background: var(--border);
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: background 0.15s, color 0.15s;
}
.footer-social a:hover { background: var(--accent); color: #fff; }

/* ----- Utility classes (shortcode compat) --------------- */
.float-end  { float: right; margin-left: 1rem; }
.clearfix::after { content: ''; display: table; clear: both; }

.mt-3 { margin-top:    1rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-5 { margin-bottom: 3rem; }

/* YouTube/video wrapper classes from teaching.md */
.col-md-8   { max-width: 640px; margin-left: auto; margin-right: auto; }
.col-sm-12  { width: 100%; }
.offset-md-2 { /* absorbed by auto margins above */ }

/* ----- Responsive --------------------------------------- */
@media (max-width: 700px) {
  /* Hamburger nav */
  .nav-toggle { display: block; }

  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-h);
    left: 0; right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: stretch;
    padding: 0.75rem 1rem;
    gap: 0.1rem;
    box-shadow: 0 8px 24px rgba(0,0,0,0.06);
  }
  .nav-links.open { display: flex; }
  .site-nav { position: relative; }

  /* Hero stacks vertically on mobile */
  .hero { padding: 3rem 1.5rem; }
  .hero-layout {
    flex-direction: column;
    text-align: center;
    gap: 2rem;
  }
  .hero-actions { justify-content: center; }

  /* Content */
  .split-layout { grid-template-columns: 1fr; gap: 2rem; }
  .page-wrap { padding: 2.5rem 1.25rem 4rem; }
}