/* ============================================
   Anna Brežġis — Personal Academic Site
   ============================================ */

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

:root {
  --bg: #FAFAF7;
  --bg-alt: #F3F2EE;
  --text: #2D2D2D;
  --text-soft: #5C5C5C;
  --text-softer: #8A8A8A;
  --accent: #7A8B6F;          /* muted sage green */
  --accent-light: #E8EDE5;
  --accent-hover: #637556;
  --border: #E2E0DB;
  --card-bg: #FFFFFF;
  --serif: 'Source Serif 4', Georgia, 'Times New Roman', serif;
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --max-width: 780px;
  --nav-height: 52px;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background: var(--accent-light);
  color: var(--text);
}

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

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

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

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

/* --- Navigation --- */
.navbar {
  position: fixed;
  top: 1.25rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.35rem 0.5rem;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
  transition: box-shadow 0.3s ease, background 0.3s ease;
}

.navbar.scrolled {
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
  background: rgba(255, 255, 255, 0.95);
}

.navbar ul {
  display: flex;
  list-style: none;
  gap: 0.25rem;
}

.nav-link {
  display: block;
  padding: 0.45rem 1.1rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-soft);
  border-radius: 999px;
  transition: all 0.2s ease;
  letter-spacing: 0.01em;
}

.nav-link:hover {
  color: var(--text);
  background: var(--bg-alt);
}

.nav-link.active {
  color: var(--accent-hover);
  background: var(--accent-light);
}

/* --- Sections --- */
.section {
  padding: 6rem 1.5rem;
}

.section-title {
  font-family: var(--serif);
  font-size: 2rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text);
  letter-spacing: -0.02em;
}

.section-intro {
  color: var(--text-soft);
  font-size: 1.05rem;
  max-width: 600px;
  margin-bottom: 2.5rem;
  line-height: 1.75;
}

/* --- Home Section --- */
.section-home {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding-top: calc(var(--nav-height) + 3rem);
  position: relative;
}

.home-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 2rem;
  max-width: var(--max-width);
}

.home-header {
  display: flex;
  align-items: center;
  gap: 2rem;
  text-align: left;
}

.home-name {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.photo-wrapper {
  width: 220px;
  height: 220px;
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid var(--border);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
  flex-shrink: 0;
}

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

.name-primary {
  font-family: var(--serif);
  font-size: 2.75rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.2;
  color: var(--text);
}

.name-russian {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 300;
  font-size: 2rem;
  color: var(--text-softer);
  margin-top: 0.25rem;
  margin-bottom: 1.25rem;
}

.tagline {
  font-size: 1.05rem;
  color: var(--text-soft);
  max-width: 560px;
  line-height: 1.75;
}

.tagline p {
  margin-bottom: 0.75rem;
}

.tagline p:last-child {
  margin-bottom: 0;
}

.home-links {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
  justify-content: center;
}

.link-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 1.2rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-soft);
  background: var(--card-bg);
  transition: all 0.2s ease;
  cursor: pointer;
}

.link-pill:hover {
  color: var(--accent-hover);
  border-color: var(--accent);
  background: var(--accent-light);
  box-shadow: 0 2px 12px rgba(122, 139, 111, 0.12);
}

.link-pill svg {
  flex-shrink: 0;
}

.scroll-hint {
  position: absolute;
  bottom: 2rem;
  color: var(--text-softer);
  animation: float 2.5s ease-in-out infinite;
  opacity: 0.5;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}

/* --- About Section --- */
.section-about {
  background: var(--bg);
}

.about-content {
  max-width: 680px;
}

.about-languages {
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
}

.about-languages p {
  margin-bottom: 0.35rem;
  font-size: 0.95rem;
}

.about-tools {
  margin-top: 0.5rem;
}

.about-tools p {
  margin-bottom: 0.35rem;
  font-size: 0.95rem;
}

.about-label {
  font-weight: 500;
  color: var(--text);
}

.about-content p {
  margin-bottom: 1.25rem;
  line-height: 1.8;
  color: var(--text-soft);
}

.about-content .lead {
  font-size: 1.1rem;
  color: var(--text);
  font-weight: 400;
}

.about-content em {
  font-style: italic;
  color: var(--text);
}

.subtle {
  font-size: 0.9rem;
  color: var(--text-softer);
  font-style: italic;
}

/* --- Research Section --- */
.section-research {
  background: var(--bg-alt);
}

.research-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}

.research-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.75rem;
  transition: all 0.25s ease;
}

.research-card:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 20px rgba(122, 139, 111, 0.1);
  transform: translateY(-2px);
}

.research-icon {
  font-size: 1.5rem;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.research-card h3 {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
  color: var(--text);
}

.research-card p {
  font-size: 0.925rem;
  color: var(--text-soft);
  line-height: 1.7;
}

/* --- Blog Section --- */
.section-blog {
  background: var(--bg);
}

.blog-preview {
  max-width: 600px;
}

.blog-card {
  border-left: 3px solid var(--accent);
  padding: 1.25rem 1.5rem;
  background: var(--card-bg);
  border-radius: 0 8px 8px 0;
  transition: box-shadow 0.2s ease;
}

.blog-card:hover {
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.05);
}

.blog-date {
  font-size: 0.8rem;
  color: var(--text-softer);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 500;
}

.blog-card h3 {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 600;
  margin: 0.35rem 0 0.5rem;
  color: var(--text);
}

.blog-card p {
  font-size: 0.925rem;
  color: var(--text-soft);
  line-height: 1.7;
}

.placeholder-card {
  opacity: 0.7;
}

/* --- Footer --- */
.footer {
  padding: 3rem 1.5rem;
  border-top: 1px solid var(--border);
  background: var(--bg);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  text-align: center;
}

.footer-name {
  font-family: var(--serif);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}

.footer-links {
  display: flex;
  gap: 1rem;
}

.footer-links a {
  color: var(--text-softer);
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: var(--accent);
}

.footer-note {
  font-size: 0.8rem;
  color: var(--text-softer);
  margin-top: 0.5rem;
}

/* --- Animations --- */
.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* stagger children */
.fade-in:nth-child(2) { transition-delay: 0.1s; }
.fade-in:nth-child(3) { transition-delay: 0.2s; }

/* --- Responsive --- */
@media (max-width: 640px) {
  .section {
    padding: 4rem 1.25rem;
  }

  .section-home {
    padding-top: calc(var(--nav-height) + 2rem);
  }

  .name-primary {
    font-size: 2rem;
  }

  .name-russian {
    font-size: 1.1rem;
  }

  .tagline {
    font-size: 0.95rem;
  }

  .photo-wrapper {
    width: 160px;
    height: 160px;
  }

  .home-header {
    flex-direction: column;
    text-align: center;
  }

  .section-title {
    font-size: 1.65rem;
  }

  .navbar {
    top: 0.75rem;
    padding: 0.3rem 0.35rem;
  }

  .nav-link {
    padding: 0.4rem 0.85rem;
    font-size: 0.8rem;
  }

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

  .home-links {
    flex-direction: column;
    align-items: center;
  }
}

@media (max-width: 380px) {
  .navbar ul {
    gap: 0.1rem;
  }

  .nav-link {
    padding: 0.35rem 0.65rem;
    font-size: 0.75rem;
  }
}