:root {
  --dark:        #152a35;
  --mid:         #1f4d66;
  --amber:       #1e90a0;
  --amber-light: #30adc4;
  --accent:      #ddf0f4;
  --rule:        #a8cfd8;
  --text:        #152a35;
  --muted:       #527a88;
  --bg:          #f0f7fa;
  --white:       #ffffff;
  --serif:       'Cormorant Garamond', 'Garamond', Georgia, serif;
  --sans:        'Source Sans 3', 'Helvetica Neue', sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  padding-bottom: 60px;
}

/* ── NAV ── */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--dark);
  display: flex;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
}
nav a {
  color: rgba(255,255,255,0.65);
  text-decoration: none;
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 12px 18px;
  transition: color 0.2s, background 0.2s;
}
nav a:hover { color: #fff; background: rgba(255,255,255,0.07); }

/* ── HERO / HEADER ── */
header {
  background: var(--mid);
  color: #fff;
  padding: 60px 0 52px;
  background-image: linear-gradient(135deg, var(--dark) 0%, var(--mid) 100%);
}
.header-inner {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 40px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 40px;
  align-items: center;
}
.header-photo img {
  width: 130px;
  height: 130px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--amber-light);
  display: block;
}
.header-text h1 {
  font-family: var(--serif);
  font-size: 3rem;
  font-weight: 300;
  letter-spacing: 0.02em;
  margin-bottom: 4px;
}
.header-tagline {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--amber-light);
  margin-bottom: 14px;
}
.header-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
  font-size: 13px;
  color: rgba(255,255,255,0.65);
}
.header-meta a { color: rgba(255,255,255,0.65); text-decoration: none; }
.header-meta a:hover { color: #fff; }
.header-social {
  margin-top: 16px;
  display: flex;
  gap: 12px;
}
.header-social a {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.55);
  text-decoration: none;
  border: 1px solid rgba(255,255,255,0.2);
  padding: 4px 10px;
  border-radius: 3px;
  transition: all 0.2s;
}
.header-social a:hover { color: #fff; border-color: var(--amber-light); background: rgba(30,144,160,0.25); }

/* ── AWARD BADGE ── */
.award-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: rgba(30,144,160,0.1);
  border: 1px solid var(--amber);
  color: var(--amber);
  border-radius: 4px;
  padding: 2px 8px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.03em;
  margin-top: 6px;
}

/* ── MAIN CONTENT ── */
main {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 40px 80px;
}

/* ── SECTION ── */
section {
  padding-top: 52px;
}
.section-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 24px;
}
.section-header h2 {
  font-family: var(--serif);
  font-size: 1.55rem;
  font-weight: 300;
  color: var(--dark);
  white-space: nowrap;
  letter-spacing: 0.03em;
}
.section-header::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--rule);
}

/* ── PROFIL ── */
#profil .profil-text {
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--text);
  max-width: 780px;
}
#profil .profil-highlights {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}
.highlight-pill {
  background: var(--white);
  border: 1px solid var(--rule);
  padding: 9px 16px;
  font-size: 13px;
  font-weight: 600;
  color: var(--mid);
  border-radius: 20px;
}

/* ── TIMELINE / EXPERIENCE ── */
.timeline { display: flex; flex-direction: column; gap: 0; }
.timeline-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 0 28px;
  padding: 20px 0;
  border-bottom: 1px solid #b8d4dc;
}
.timeline-item:last-child { border-bottom: none; }
.tl-date {
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--amber);
  text-transform: uppercase;
  padding-top: 2px;
  line-height: 1.4;
}
.tl-date .tl-org {
  display: block;
  font-weight: 400;
  color: var(--muted);
  font-size: 11.5px;
  letter-spacing: 0.02em;
  text-transform: none;
  margin-top: 3px;
}
.tl-content h3 {
  font-family: var(--sans);
  font-size: 15px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 5px;
}
.tl-content p {
  font-size: 14px;
  color: #3d5c68;
  line-height: 1.65;
  margin-bottom: 6px;
}
.tl-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: 8px;
}
.tag {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--amber);
  background: var(--accent);
  padding: 2px 8px;
  border-radius: 3px;
}

/* ── PROJEKTE ── */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}
.project-card {
  background: var(--white);
  border: 1px solid #b8d4dc;
  padding: 20px 22px;
  border-radius: 10px;
}
.project-card h3 {
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 6px;
}
.project-card p {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.6;
}
.project-card .proj-tags { margin-top: 10px; }

/* ── SKILLS ── */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 28px;
}
.skill-group h3 {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 10px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--rule);
}
.skill-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 5px 0;
  border-bottom: 1px dashed #c0dde4;
  font-size: 13.5px;
}
.skill-row:last-child { border-bottom: none; }
.skill-name { color: var(--text); }
.skill-level {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 2px 7px;
  border-radius: 2px;
}
.level-expert   { background: var(--amber);  color: #fff; }
.level-advanced { background: #5a8fa0; color: #fff; }
.level-basic    { background: #cde8ee; color: #527a88; }

/* ── EXPEDITIONS ── */
.expedition-list { display: flex; flex-direction: column; gap: 0; }
.exp-item {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 0 28px;
  padding: 14px 0;
  border-bottom: 1px solid #b8d4dc;
  font-size: 13.5px;
}
.exp-item:last-child { border-bottom: none; }
.exp-where {
  font-weight: 700;
  color: var(--dark);
  font-size: 13px;
}
.exp-where span { display: block; font-weight: 400; color: var(--muted); font-size: 12px; }
.exp-desc { color: #3d5c68; line-height: 1.6; }

/* ── PUBS ── */
.pub-list { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.pub-list li {
  font-size: 13px;
  color: #3d5c68;
  line-height: 1.6;
  padding-left: 18px;
  position: relative;
}
.pub-list li::before {
  content: '–';
  position: absolute;
  left: 0;
  color: var(--amber);
  font-weight: 700;
}
.pub-list li a { color: var(--amber); text-decoration: none; }
.pub-list li a:hover { text-decoration: underline; }
.pub-list li strong { color: var(--dark); }

/* ── MISC TABLES ── */
.two-col { display: grid; grid-template-columns: 160px 1fr; gap: 0; }
.two-col-row {
  display: contents;
}
.two-col-row > * {
  padding: 7px 0;
  border-bottom: 1px solid #c8e2e8;
  font-size: 13.5px;
}
.two-col-row > *:last-child { padding-left: 12px; }
.two-col-label { font-weight: 700; color: var(--dark); font-size: 13px; }

/* ── LEHRE ── */
.teach-group { margin-bottom: 20px; }
.teach-group h3 {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 8px;
}
.teach-group ul { list-style: none; display: flex; flex-direction: column; gap: 6px; }
.teach-group li {
  font-size: 13.5px;
  color: #3d5c68;
  padding-left: 14px;
  position: relative;
}
.teach-group li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--amber);
  font-size: 10px;
  top: 3px;
}

/* ── FOOTER ── */
footer {
  position: sticky;
  bottom: 0;
  z-index: 100;
  background: var(--dark);
  color: rgba(255,255,255,0.45);
  text-align: center;
  padding: 14px 40px;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
}
footer a { color: rgba(255,255,255,0.55); text-decoration: none; }
footer a:hover { color: #fff; }
.footer-links { display: flex; justify-content: center; align-items: center; gap: 16px; flex-wrap: wrap; }
.footer-links a { display: flex; align-items: center; opacity: 0.7; transition: opacity 0.2s; }
.footer-links a:hover { opacity: 1; }
.footer-download {
  display: inline-block;
  background: var(--amber);
  color: #fff !important;
  text-decoration: none;
  padding: 6px 16px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: 3px;
  transition: background 0.2s;
  white-space: nowrap;
}
.footer-download:hover { background: var(--amber-light) !important; }

/* ── RESPONSIVE ── */
@media (max-width: 680px) {
  .header-inner { grid-template-columns: 1fr; text-align: center; gap: 20px; }
  .header-photo img { margin: 0 auto; }
  .header-social { justify-content: center; }
  .header-meta { justify-content: center; }
  .timeline-item { grid-template-columns: 1fr; gap: 4px; }
  .exp-item { grid-template-columns: 1fr; gap: 4px; }
  main { padding: 0 20px 60px; }
}