/* ────────────────────────────────────────────────
   Federico Bartsch — Personal Site
   Style: al-folio (alshedivat.github.io/al-folio)
   Light + Dark mode
   ──────────────────────────────────────────────── */

/* ── Tokens ── */
:root {
  --bg:            #ffffff;
  --bg-alt:        #f8f9fa;
  --text:          #212529;
  --text-muted:    #6c757d;
  --link:          #2698ba;          /* al-folio teal */
  --link-hover:    #1a6e87;
  --border:        #dee2e6;
  --navbar-bg:     #ffffff;
  --navbar-shadow: 0 1px 0 0 rgba(0,0,0,.08);
  --badge-bg:      #2698ba;
  --badge-text:    #fff;
  --card-bg:       #ffffff;
  --card-border:   #dee2e6;
  --btn-bg:        #f8f9fa;
  --btn-border:    #ced4da;
  --btn-text:      #495057;
  --btn-hover-bg:  #2698ba;
  --btn-hover-text:#fff;
  --initials-bg:   #2698ba;
  --initials-text: #fff;
  --font:          'Nunito Sans', 'Helvetica Neue', Arial, sans-serif;
  --radius:        4px;
}

[data-theme="dark"] {
  --bg:            #1a1a2e;
  --bg-alt:        #16213e;
  --text:          #e0e0e0;
  --text-muted:    #9a9ab0;
  --link:          #5ab9d5;
  --link-hover:    #89d0e8;
  --border:        #2e2e4e;
  --navbar-bg:     #16213e;
  --navbar-shadow: 0 1px 0 0 rgba(255,255,255,.05);
  --badge-bg:      #5ab9d5;
  --badge-text:    #0e0e1a;
  --card-bg:       #1e1e3a;
  --card-border:   #2e2e4e;
  --btn-bg:        #1e1e3a;
  --btn-border:    #3a3a5e;
  --btn-text:      #c0c0e0;
  --btn-hover-bg:  #5ab9d5;
  --btn-hover-text:#0e0e1a;
  --initials-bg:   #5ab9d5;
  --initials-text: #0e0e1a;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.7;
  background: var(--bg);
  color: var(--text);
  transition: background 0.25s, color 0.25s;
}

a { color: var(--link); text-decoration: none; transition: color 0.15s; }
a:hover { color: var(--link-hover); text-decoration: underline; }

strong { font-weight: 600; }

/* ── Navbar ── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 200;
  background: var(--navbar-bg);
  box-shadow: var(--navbar-shadow);
  padding: 0;
  transition: background 0.25s;
}

.nav-inner {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 56px;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-brand {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  flex-shrink: 0;
  text-decoration: none;
}
.nav-brand:hover { color: var(--link); text-decoration: none; }

.nav-menu {
  display: flex;
  list-style: none;
  gap: 0;
  margin-left: 1rem;
  flex: 1;
}

.nav-menu a {
  display: block;
  padding: 0.2rem 0.85rem;
  font-size: 0.88rem;
  color: var(--text-muted);
  text-decoration: none;
  border-radius: var(--radius);
  transition: color 0.15s, background 0.15s;
}
.nav-menu a:hover,
.nav-menu a.active {
  color: var(--link);
  background: transparent;
  text-decoration: none;
}
.nav-menu a.active { font-weight: 600; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  margin-left: auto;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-muted);
  border-radius: 2px;
}

.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 1rem;
  padding: 4px 6px;
  border-radius: var(--radius);
  transition: color 0.15s;
  margin-left: auto;
}
.theme-toggle:hover { color: var(--link); }

/* ── Page wrap ── */
.page-wrap {
  max-width: 900px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}

/* ── About section ── */
.about-section {
  display: flex;
  gap: 2.5rem;
  align-items: flex-start;
  margin-bottom: 3.5rem;
}

/* Profile column */
.profile-col {
  flex-shrink: 0;
  width: 180px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  text-align: center;
}

.profile-img-wrap {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  overflow: hidden;
  background: var(--initials-bg);
  display: flex;
  align-items: center;
  justify-content: center;
}

.profile-initials {
  font-size: 2.8rem;
  font-weight: 600;
  color: var(--initials-text);
  letter-spacing: 0.04em;
  user-select: none;
}

.profile-meta {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.8;
}
.profile-meta i { width: 14px; }

.social-row {
  display: flex;
  gap: 0.7rem;
  justify-content: center;
  flex-wrap: wrap;
}
.social-row a {
  font-size: 1.25rem;
  color: var(--text-muted);
  transition: color 0.15s;
  text-decoration: none;
}
.social-row a:hover { color: var(--link); text-decoration: none; }

/* Bio column */
.bio-col { flex: 1; min-width: 0; }

.bio-col h1 {
  font-size: 1.65rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.2rem;
  line-height: 1.2;
}

.affil {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.bio {
  font-size: 0.95rem;
  color: var(--text);
  margin-bottom: 1.5rem;
  line-height: 1.75;
}

/* News */
.news-block h2 {
  font-size: 1rem;
  font-weight: 600;
  text-transform: lowercase;
  letter-spacing: 0.04em;
  color: var(--text);
  margin-bottom: 0.6rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.3rem;
}

.news-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}
.news-table tr + tr td { padding-top: 0.45rem; }
.news-table td { padding: 0.2rem 0; vertical-align: top; line-height: 1.55; }

.news-date {
  white-space: nowrap;
  color: var(--text-muted);
  padding-right: 1rem;
  font-size: 0.82rem;
  min-width: 88px;
}

/* ── Shared section styles ── */
.content-section {
  margin-bottom: 3rem;
}

.section-heading {
  font-size: 1.15rem;
  font-weight: 600;
  text-transform: lowercase;
  letter-spacing: 0.04em;
  color: var(--text);
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.4rem;
  margin-bottom: 1.5rem;
}

/* ── Publications ── */
.pub-list {
  list-style: none;
  counter-reset: pub;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.pub-item {
  display: flex;
  gap: 1.4rem;
  align-items: flex-start;
  padding: 1.2rem 1.4rem;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  transition: box-shadow 0.2s;
}
.pub-item:hover { box-shadow: 0 2px 12px rgba(0,0,0,.08); }

.pub-thumb {
  flex-shrink: 0;
  width: 80px;
  height: 80px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 1.6rem;
}

.pub-body { flex: 1; min-width: 0; }

.pub-venue-row { margin-bottom: 0.4rem; }

.pub-venue-badge {
  display: inline-block;
  background: var(--badge-bg);
  color: var(--badge-text);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 0.15rem 0.55rem;
  border-radius: 3px;
}

.pub-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
  margin-bottom: 0.3rem;
}

.pub-authors {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.2rem;
  line-height: 1.5;
}
.pub-authors strong { color: var(--text); }

.equal-note {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.pub-journal {
  font-size: 0.83rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.pub-abstract {
  font-size: 0.83rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 0.7rem;
}

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

.pub-btn {
  display: inline-block;
  padding: 0.2rem 0.65rem;
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--btn-bg);
  color: var(--btn-text);
  border: 1px solid var(--btn-border);
  border-radius: 3px;
  text-decoration: none;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.pub-btn:hover {
  background: var(--btn-hover-bg);
  color: var(--btn-hover-text);
  border-color: var(--btn-hover-bg);
  text-decoration: none;
}

/* ── CV ── */
.cv-subhead {
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  margin-top: 1.5rem;
}
.cv-subhead:first-of-type { margin-top: 0; }

.cv-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.cv-table tr td {
  padding: 0.65rem 0;
  vertical-align: top;
  border-bottom: 1px solid var(--border);
  line-height: 1.55;
}
.cv-table tr:last-child td { border-bottom: none; }

.cv-date {
  white-space: nowrap;
  min-width: 130px;
  padding-right: 1.5rem;
  color: var(--text-muted);
  font-size: 0.83rem;
}

.cv-points {
  margin: 0.4rem 0 0 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.cv-points li {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ── Footer ── */
.site-footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  text-align: center;
  padding: 1.5rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  transition: background 0.25s;
}
.site-footer a { color: var(--text-muted); }
.site-footer a:hover { color: var(--link); text-decoration: none; }

/* ── Responsive ── */
@media (max-width: 700px) {
  .about-section { flex-direction: column; align-items: center; }
  .profile-col { width: 100%; }

  .nav-toggle { display: flex; }
  .nav-menu {
    display: none;
    position: absolute;
    top: 56px;
    left: 0; right: 0;
    background: var(--navbar-bg);
    flex-direction: column;
    padding: 0.5rem 1rem 1rem;
    box-shadow: 0 4px 12px rgba(0,0,0,.1);
    gap: 0;
  }
  .nav-menu.open { display: flex; }
  .nav-menu a { padding: 0.5rem 0.5rem; }

  .theme-toggle { margin-left: 0; }

  .pub-item { flex-direction: column; }
  .pub-thumb { width: 100%; height: 60px; }

  .cv-table, .cv-table tbody, .cv-table tr, .cv-table td {
    display: block;
  }
  .cv-date { padding-right: 0; }
}