/*
Theme Name: Nohr Academic
Theme URI: https://nuetzliche-bilder.de
Author: Rolf F. Nohr
Description: Akademisches Portfolio-Theme für nuetzliche-bilder.de
Version: 1.0
*/

@import url('https://fonts.googleapis.com/css2?family=Libre+Baskerville:ital,wght@0,400;0,700;1,400&family=DM+Mono:wght@300;400&display=swap');

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

:root {
  --ink: #1a1814;
  --ink-muted: #6b6760;
  --paper: #f5f2ec;
  --paper-warm: #ede9e1;
  --accent-light: #4a6741;
  --rule: #c8c2b8;
  --serif: 'Libre Baskerville', Georgia, serif;
  --mono: 'DM Mono', monospace;
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 16px;
  line-height: 1.7;
}

/* HEADER */
.site-header {
  border-bottom: 1px solid var(--rule);
  padding: 0 2.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-branding .site-title {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--ink-muted);
  text-decoration: none;
}

.site-branding .site-title:hover { color: var(--ink); }

/* NAVIGATION */
.main-navigation ul {
  display: flex;
  gap: 1.75rem;
  list-style: none;
}

.main-navigation ul li a {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-muted);
  text-decoration: none;
}

.main-navigation ul li a:hover { color: var(--ink); }

/* CONTENT */
.site-content {
  max-width: 100%;
}

/* PAGE / POST */
.entry-title {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
  color: var(--ink);
}

.entry-content {
  font-size: 1rem;
  line-height: 1.85;
  max-width: 660px;
}

.entry-content p { margin-bottom: 1.25rem; }
.entry-content h2 { font-size: 1.4rem; margin: 2rem 0 1rem; }
.entry-content h3 { font-size: 1.2rem; margin: 1.5rem 0 0.75rem; }
.entry-content a { color: var(--accent-light); }
.entry-content ul, .entry-content ol { padding-left: 1.5rem; margin-bottom: 1rem; }
.entry-content li { margin-bottom: 0.4rem; }
.entry-content img { max-width: 100%; height: auto; }

/* HERO (Frontpage) */
.hero {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr 0.7fr;
  border-bottom: 1px solid var(--rule);
  min-height: 480px;
}

.hero-col {
  border-right: 1px solid var(--rule);
  display: flex;
  flex-direction: column;
}

.hero-col:last-child { border-right: none; }

.hero-main-text {
  padding: 3.5rem 2.5rem 2.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.hero-eyebrow {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 1.5rem;
}

.hero-name {
  font-size: clamp(2.2rem, 4.5vw, 3.6rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
}

.hero-tagline {
  font-size: 0.95rem;
  font-style: italic;
  color: var(--ink-muted);
  line-height: 1.7;
  max-width: 320px;
  flex: 1;
}

.hero-meta {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-muted);
  line-height: 2;
  margin-top: 2rem;
}

.hero-img-main {
  height: 100%;
  overflow: hidden;
}

.hero-img-main img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
  filter: grayscale(10%) contrast(1.05);
  transition: transform 0.6s ease;
}

.hero-img-main:hover img { transform: scale(1.03); }

.hero-right { display: flex; flex-direction: column; }

.hero-img-small {
  flex: 1;
  overflow: hidden;
  border-bottom: 1px solid var(--rule);
  position: relative;
}

.hero-img-small:last-child { border-bottom: none; }

.hero-img-small img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: grayscale(20%) sepia(8%);
  transition: transform 0.5s ease;
}

.hero-img-small:hover img { transform: scale(1.05); }

.hero-img-label {
  position: absolute;
  bottom: 0.6rem;
  left: 0.75rem;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.85);
  text-shadow: 0 1px 4px rgba(0,0,0,0.5);
}

/* TOPIC STRIP */
.topic-strip {
  border-bottom: 1px solid var(--rule);
  display: flex;
  overflow-x: auto;
  scrollbar-width: none;
}

.topic-strip::-webkit-scrollbar { display: none; }

.topic-item {
  flex: 1;
  min-width: 130px;
  padding: 1rem 1.25rem;
  border-right: 1px solid var(--rule);
  cursor: pointer;
  transition: background 0.15s;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.topic-item:last-child { border-right: none; }
.topic-item:hover { background: var(--paper-warm); }

.topic-thumb {
  width: 32px;
  height: 32px;
  border-radius: 2px;
  object-fit: cover;
  flex-shrink: 0;
  filter: grayscale(20%);
}

.topic-num {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ink-muted);
}

.topic-name {
  font-size: 12px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.2;
}

/* MAIN GRID */
.main-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  border-bottom: 1px solid var(--rule);
}

.main-content { padding: 3.5rem 2.5rem; border-right: 1px solid var(--rule); }

.section-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.section-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--rule);
}

/* SIDEBAR */
.widget-area { padding: 3.5rem 2rem; }

.widget { margin-bottom: 2.5rem; }

.widget-title {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.widget-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--rule);
}

.widget p {
  font-family: var(--mono);
  font-size: 12px;
  line-height: 2;
  color: var(--ink-muted);
}

.widget a { color: var(--accent-light); text-decoration: none; }
.widget a:hover { text-decoration: underline; }

/* RESEARCH GRID */
.research-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-bottom: 1px solid var(--rule);
}

.research-card {
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  cursor: pointer;
  transition: background 0.15s;
  overflow: hidden;
  text-decoration: none;
  display: block;
}

.research-card:nth-child(3n) { border-right: none; }
.research-card:hover { background: var(--paper-warm); }

.research-card-img {
  width: 100%;
  height: 140px;
  object-fit: cover;
  display: block;
  filter: grayscale(25%) sepia(8%);
  border-bottom: 1px solid var(--rule);
  transition: filter 0.3s ease;
}

.research-card:hover .research-card-img { filter: grayscale(5%) sepia(3%); }

.research-card-body { padding: 1.5rem 1.5rem 1.75rem; }

.research-card-tag {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: 0.6rem;
}

.research-card-title {
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 0.6rem;
  color: var(--ink);
}

.research-card-desc {
  font-size: 12.5px;
  color: var(--ink-muted);
  line-height: 1.6;
}

/* SUBPAGE */
.subpage-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-bottom: 1px solid var(--rule);
  min-height: 280px;
}

.subpage-hero-text {
  padding: 3rem 2.5rem;
  border-right: 1px solid var(--rule);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.subpage-hero-img { overflow: hidden; }

.subpage-hero-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: grayscale(20%) sepia(8%);
}

.subpage-tag {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: 1rem;
}

.subpage-title {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--ink);
}

/* PUB LIST */
.pub-list { list-style: none; }

.pub-list li {
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--rule);
  font-size: 13px;
  line-height: 1.5;
  display: flex;
  gap: 0.75rem;
}

.pub-year {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ink-muted);
  flex-shrink: 0;
  margin-top: 3px;
}

/* FOOTER */
.site-footer {
  padding: 1.75rem 2.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--rule);
}

.site-info {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-muted);
}

.footer-nav ul {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.footer-nav ul li a {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-muted);
  text-decoration: none;
}

.footer-nav ul li a:hover { color: var(--ink); }

/* RESPONSIVE */
@media (max-width: 768px) {
  .hero { grid-template-columns: 1fr; }
  .hero-col { border-right: none; border-bottom: 1px solid var(--rule); }
  .main-grid { grid-template-columns: 1fr; }
  .research-grid { grid-template-columns: 1fr; }
  .subpage-hero { grid-template-columns: 1fr; }
  .site-header { padding: 0 1rem; }
}