/* ============================================
   Alina Pfrang — Personal Website
   Typography: Lora (serif) + DM Sans (sans-serif)
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Lora:ital,wght@0,400;0,500;1,400&family=DM+Sans:wght@300;400;500&display=swap');

:root {
  --text-primary: #1a1a1a;
  --text-secondary: #5a5a5a;
  --text-tertiary: #8a8a8a;
  --border: rgba(0, 0, 0, 0.12);
  --border-strong: rgba(0, 0, 0, 0.25);
  --bg: #fdfcfa;
  --bg-soft: #f5f3ee;
  --accent: #8a5a3b;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'DM Sans', sans-serif;
  font-weight: 300;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 780px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}

/* ---------- Navigation ---------- */
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 3.5rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 1rem;
}

.nav-name {
  font-family: 'Lora', serif;
  font-size: 17px;
  font-weight: 500;
  letter-spacing: 0.01em;
  text-decoration: none;
  color: var(--text-primary);
}

.nav-links {
  display: flex;
  gap: 1.75rem;
  list-style: none;
}

.nav-links a {
  font-size: 13px;
  font-weight: 400;
  color: var(--text-secondary);
  text-decoration: none;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: color 0.15s;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
}

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

/* ---------- Typography ---------- */
h1 {
  font-family: 'Lora', serif;
  font-size: 32px;
  font-weight: 500;
  line-height: 1.2;
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}

h2 {
  font-family: 'Lora', serif;
  font-size: 22px;
  font-weight: 500;
  margin-bottom: 1rem;
  margin-top: 2.5rem;
  letter-spacing: -0.005em;
}

h3 {
  font-family: 'DM Sans', sans-serif;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  margin-top: 2rem;
}

p {
  margin-bottom: 1.1rem;
  font-size: 15.5px;
}

a {
  color: var(--text-primary);
  text-decoration: underline;
  text-decoration-color: var(--border-strong);
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: text-decoration-color 0.15s;
}

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

/* ---------- Home page hero ---------- */
.hero {
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: 3rem;
  align-items: start;
  margin-bottom: 2rem;
}

.position {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 2rem;
}

.position span { display: block; }

.about-text {
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

.interests {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  padding-left: 1rem;
  border-left: 2px solid var(--bg-soft);
}

.interests strong {
  color: var(--text-primary);
  font-weight: 500;
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.link-pill {
  font-family: 'DM Sans', sans-serif;
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.04em;
  padding: 6px 14px;
  border: 1px solid var(--border-strong);
  border-radius: 20px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.15s;
  background: transparent;
}

.link-pill:hover {
  color: var(--text-primary);
  border-color: var(--accent);
  background: var(--bg-soft);
}

/* ---------- Photo column ---------- */
.photo-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
}

.photo-frame {
  width: 100%;
  aspect-ratio: 4 / 5;
  border-radius: 4px;
  overflow: hidden;
  background: var(--bg-soft);
}

.photo-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.contact-mini {
  font-size: 12.5px;
  color: var(--text-secondary);
  text-align: center;
  line-height: 1.7;
}

.contact-mini a {
  color: var(--text-secondary);
  text-decoration: none;
}

.contact-mini a:hover { color: var(--text-primary); }

/* ---------- Research / Teaching lists ---------- */
.paper {
  margin-bottom: 1.75rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.paper:last-child {
  border-bottom: none;
}

.paper-title {
  font-family: 'Lora', serif;
  font-size: 17px;
  font-weight: 500;
  line-height: 1.4;
  margin-bottom: 0.4rem;
  color: var(--text-primary);
}

.paper-meta {
  font-size: 13.5px;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  line-height: 1.6;
}

.paper-status {
  display: inline-block;
  font-family: 'DM Sans', sans-serif;
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 9px;
  background: var(--bg-soft);
  border-radius: 3px;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.paper-status.published {
  background: #e8efe6;
  color: #4a6240;
}

.section-intro {
  font-size: 14.5px;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.7;
}

ul.simple-list {
  list-style: none;
  padding: 0;
}

ul.simple-list li {
  font-size: 14.5px;
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--border);
  color: var(--text-primary);
  line-height: 1.6;
}

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

ul.simple-list .item-meta {
  display: block;
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 2px;
}

/* ---------- Footer ---------- */
footer {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-tertiary);
  text-align: center;
  letter-spacing: 0.02em;
}

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
  .container {
    padding: 1.5rem 1.25rem 3rem;
  }
  .hero {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .photo-col {
    order: -1;
    max-width: 200px;
    margin: 0 auto;
  }
  h1 { font-size: 28px; }
  h2 { font-size: 20px; }
  nav {
    margin-bottom: 2rem;
  }
  .nav-links {
    gap: 1.25rem;
  }
}