/* ============================================
   Homaira Huda Shomee — site stylesheet
   ============================================ */

:root {
  --color-primary: #4a7fc7;      /* header/accent blue, close to original theme */
  --color-primary-dark: #35608f;
  --color-ink: #23262b;
  --color-text: #3a3f47;
  --color-muted: #6b7280;
  --color-bg: #ffffff;
  --color-bg-soft: #f5f6f8;
  --color-border: #e4e6ea;
  --font-display: 'Merriweather', Georgia, serif;
  --font-body: 'Raleway', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --max-width: 1100px;
  --radius: 10px;
}

* { box-sizing: border-box; }

html { font-size: 15px; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}

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

a { color: inherit; text-decoration: none; }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  color: var(--color-ink);
  margin: 0 0 0.6em;
  line-height: 1.25;
}

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Header / Nav ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #ffffff;
  border-bottom: 1px solid var(--color-border);
}

.nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 28px;
  margin: 0;
  padding: 0;
}

.nav-links a {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-ink);
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.nav-toggle span {
  display: block;
  width: 26px;
  height: 3px;
  margin: 5px 0;
  background: var(--color-ink);
  border-radius: 2px;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 26px;
  border-radius: 999px;
  background-color: var(--color-primary) !important;
  color: #fff !important;
  font-weight: 700;
  font-size: 0.9rem;
  border: none;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.15s ease;
}

.btn:hover { background: var(--color-primary-dark); transform: translateY(-1px); }

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
  padding: 8px 24px;
}

.btn-outline:hover { background: var(--color-primary); color: #fff; }

.btn-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  border-radius: 999px;
  background: var(--color-bg-soft);
  color: var(--color-text);
  font-size: 0.85rem;
  font-weight: 600;
  margin: 4px 6px 4px 0;
  transition: background 0.2s ease;
}

.btn-link:hover { background: #e9ecf1; }

.btn-link img { width: 14px; height: 14px; }

/* ---------- Hero (index page) ---------- */

.hero {
  padding: 60px 0 40px;
  text-align: center;
}

.hero h1 {
  font-size: 2.4rem;
  font-weight: 700;
}

.hero-rule {
  width: 90px;
  height: 3px;
  background: var(--color-primary);
  margin: 18px auto 40px;
  border: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 40px;
  align-items: center;
  text-align: left;
}

.hero-bio p {
  font-size: 1.05rem;
}

.hero-bio a { color: var(--color-primary); font-weight: 600; }

.education-card {
  background: var(--color-bg-soft);
  border-radius: var(--radius);
  padding: 24px 28px;
  margin: 24px 0;
}

.education-card h4 {
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.95rem;
  margin-bottom: 12px;
}

.education-card p { margin: 0; font-size: 0.95rem; }

.social-icons {
  display: flex;
  gap: 16px;
  margin-top: 18px;
}

.social-icons img,
.social-icons svg { width: 24px; height: 24px; }

.social-icons a { color: var(--color-muted); transition: color 0.2s ease; }
.social-icons a:hover { color: var(--color-primary); }

.hero-photo {
  border-radius: 50%;
  overflow: hidden;
  aspect-ratio: 1 / 1;
  box-shadow: 0 10px 30px rgba(0,0,0,0.12);
}

.hero-photo img { width: 100%; height: 100%; object-fit: cover; }

/* ---------- Updates section ---------- */

.updates-section {
  background: #eef2f8;
  padding: 50px 0;
}

.updates-section h4 {
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 1rem;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.updates-icon { width: 80px; height: 80px; margin: 0; }

.updates-carousel {
  position: relative;
  max-width: 780px;
  margin: 0 auto;
  padding: 0 56px;
}

.updates-slide { display: none; }
.updates-slide.active { display: block; }

.carousel-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--color-primary);
  transition: background 0.2s ease;
}

.carousel-arrow:hover { background: var(--color-bg-soft); }
.carousel-arrow.prev { left: 0; }
.carousel-arrow.next { right: 0; }
.carousel-arrow svg { fill: currentColor; }

.updates-list {
  list-style: none;
  margin: 0 auto;
  padding: 0;
  max-height: 340px;
  overflow-y: auto;
}

.updates-list li {
  display: flex;
  gap: 12px;
  padding: 10px 6px;
  border-bottom: 1px solid #dbe2ec;
  font-size: 0.95rem;
}

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

.updates-list .dot { color: var(--color-primary); flex-shrink: 0; }

/* ---------- Experience timeline ---------- */

.experience { padding: 60px 0; }

.experience h4 { text-align: center; margin-bottom: 30px; }

.timeline-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  margin-bottom: 20px;
  border-radius: var(--radius);
  overflow: hidden;
  min-height: 180px;
}

.timeline-row.reverse { direction: rtl; }
.timeline-row.reverse > * { direction: ltr; }

.timeline-text {
  background: var(--color-bg-soft);
  padding: 28px 32px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.timeline-text .date {
  font-style: italic;
  color: var(--color-muted);
  font-size: 0.9rem;
  margin-bottom: 8px;
}

.timeline-photo { min-height: 180px; background-size: cover; background-position: center; }

/* ---------- CTA ---------- */

.cta {
  background: var(--color-bg-soft);
  padding: 40px 0;
  text-align: center;
}

.cta h5 { font-size: 1.1rem; margin-bottom: 18px; }

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

.page-title {
  text-align: center;
  padding: 40px 0 20px;
  background: #a6bbd4;
  border: 2px solid #404040;
}

.page-title h3 {
  font-family: 'Abril Fatface', var(--font-display);
  color: #000000;
  font-size: 1.8rem;
  margin: 0;
}

.interest-tags {
  text-align: center;
  padding: 20px 0;
  font-weight: 600;
  color: var(--color-ink);
  border-bottom: 1px solid var(--color-border);
}

.interest-tags img { width: 14px; height: 14px; display: inline-block; vertical-align: middle; margin: 0 6px; }

.pub-section { padding: 30px 0; }

.pub-year {
  display: block;
  border-left: 20px solid #4c637f;
  padding: 10px 0 10px 20px;
  font-family: var(--font-display);
  font-size: 1.1rem;
  margin: 0 0 18px;
}

.pub-entry {
  margin: 0 0 18px;
  font-size: 0.98rem;
}

.pub-entry .pub-icon { width: 14px; height: 14px; display: inline-block; vertical-align: middle; margin-right: 4px; }

.pub-entry .pub-title { color: var(--color-primary-dark); font-weight: 700; }

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

.site-footer {
  background: #eef1f5;
  padding: 40px 0;
  margin-top: 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 20px;
  align-items: center;
  font-size: 0.85rem;
  color: var(--color-muted);
}

.footer-grid .center { text-align: center; }
.footer-grid .right { text-align: right; }

@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr; text-align: center; }
  .footer-grid .right, .footer-grid .center { text-align: center; }
  .social-icons { justify-content: center; }
}

/* ---------- Mobile nav + responsive ---------- */

@media (max-width: 760px) {
  .hero-grid { grid-template-columns: 1fr; }
  .timeline-row, .timeline-row.reverse { grid-template-columns: 1fr; }
  .timeline-photo { min-height: 160px; order: -1; }

  .nav { justify-content: space-between; }
  .nav-toggle { display: block; }
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    padding: 16px 24px;
    gap: 14px;
    border-bottom: 1px solid var(--color-border);
    display: none;
  }
  .nav-links.open { display: flex; }
}