/* ==========================================================================
   Andreas Busch — Restall-inspired, red accents, v4
   ========================================================================== */

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

:root {
  --color-bg: #fdfdfc;
  --color-text: #333;
  --color-text-light: #555;
  --color-text-muted: #888;
  --color-accent: #a02020;
  --color-accent-hover: #7a1515;
  --color-link: #a02020;
  --color-link-hover: #7a1515;
  --color-border: #ccc;
  --color-border-light: #e0deda;
  --color-bg-alt: #f4f2ef;
  --color-bg-footer: #3a3a3a;
  --color-bg-footer-text: #ccc;
  --color-white: #fff;

  --font-body: 'Source Serif 4', 'Source Serif Pro', 'Georgia', serif;
  --font-heading: 'Source Sans 3', 'Source Sans Pro', 'Helvetica Neue', sans-serif;
  --font-mono: 'Source Code Pro', 'Menlo', monospace;
  --font-size-base: 17px;
  --line-height: 1.72;

  --max-width: 960px;
  --spacing: 1.5rem;
  --spacing-lg: 2.5rem;
}

html {
  font-size: var(--font-size-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: var(--line-height);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* --- Links: red --- */
a {
  color: var(--color-link);
  text-decoration: none;
  transition: color 0.15s ease;
}

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

/* --- Header: red bar --- */
.site-header {
  background: var(--color-accent);
  padding: 0.75rem 0;
}

.site-header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
}

.site-title a { color: var(--color-white); }
.site-title a:hover { color: rgba(255,255,255,0.8); }

.site-nav {
  display: flex;
  gap: 1.4rem;
  align-items: center;
}

.site-nav a {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  color: rgba(255,255,255,0.85);
  letter-spacing: 0.01em;
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--color-white);
  border-bottom-color: var(--color-white);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-white);
}

/* --- Main --- */
.site-main {
  flex: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-lg) var(--spacing);
  width: 100%;
}

/* --- Hero intro: rectangular photo --- */
.hero-intro {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
  padding-bottom: 1.5rem;
  margin-bottom: 1.8rem;
  border-bottom: 1px solid var(--color-border-light);
}

.hero-intro-portrait {
  flex-shrink: 0;
}

.hero-intro-portrait img {
  width: 180px;
  height: auto;
  border-radius: 3px;
}

.hero-intro-text {
  font-size: 0.95rem;
  line-height: 1.65;
}

.hero-intro-text p {
  margin-bottom: 0.4rem;
}

.pilcrow {
  color: var(--color-text-muted);
  margin: 0 0.15em;
}

/* --- Two-column homepage --- */
.home-columns {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 2.5rem;
}

/* --- Section headings: red --- */
.home-section-heading {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 1rem;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid var(--color-border-light);
}

.home-section-heading a { color: var(--color-accent); }
.home-section-heading a:hover { color: var(--color-accent-hover); }

/* --- Blog on homepage --- */
.home-post {
  margin-bottom: 1.6rem;
  padding-bottom: 1.6rem;
  border-bottom: 1px solid var(--color-border-light);
}

.home-post:last-child { border-bottom: none; }

.home-post-title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.1rem;
}

.home-post-title a { color: var(--color-text); }
.home-post-title a:hover { color: var(--color-accent); }

.home-post-meta {
  font-family: var(--font-heading);
  font-size: 0.78rem;
  color: var(--color-text-muted);
  margin-bottom: 0.4rem;
}

.home-post-excerpt {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.55;
}

/* --- Sidebar --- */
.sidebar-item {
  font-size: 0.83rem;
  line-height: 1.5;
  margin-bottom: 0.8rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid var(--color-border-light);
  color: var(--color-text-light);
}

.sidebar-item:last-child { border-bottom: none; }

.sidebar-item .pub-link {
  font-family: var(--font-heading);
  font-size: 0.73rem;
  color: var(--color-link);
  margin-left: 0.15em;
}

.sidebar-item .pub-link:hover { color: var(--color-link-hover); }

.sidebar-section { margin-bottom: 2rem; }

/* --- Headings --- */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--color-text);
  line-height: 1.3;
}

h1 { font-size: 1.6rem; margin-bottom: 0.8rem; }
h2 { font-size: 1.3rem; margin: 1.8rem 0 0.7rem; }
h3 { font-size: 1.1rem; margin: 1.4rem 0 0.5rem; }
h4 { font-size: 0.95rem; margin: 1rem 0 0.4rem; }

.section-heading {
  font-size: 1.4rem;
  color: var(--color-accent);
  border-bottom: 1px solid var(--color-border-light);
  padding-bottom: 0.3rem;
  margin-bottom: 1.5rem;
}

/* --- Publications List --- */
.pub-year-group { margin-bottom: 1.8rem; }

.pub-year {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 0.6rem;
  padding-bottom: 0.25rem;
  border-bottom: 1px solid var(--color-border-light);
}

.pub-entry {
  margin-bottom: 0.8rem;
  font-size: 0.92rem;
  line-height: 1.6;
}

.pub-citation { color: var(--color-text); }

.pub-buttons { display: inline; margin-left: 0.3em; }

.pub-btn {
  font-family: var(--font-heading);
  font-size: 0.78rem;
  color: var(--color-link);
  border: none;
  background: none;
  padding: 0;
  margin-left: 0.1em;
}

.pub-btn:hover { color: var(--color-link-hover); }
.pub-btn::before { content: "["; color: var(--color-text-muted); }
.pub-btn::after { content: "]"; color: var(--color-text-muted); }

/* --- Blog list --- */
.post-list { list-style: none; }

.post-list-item {
  margin-bottom: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border-light);
}

.post-list-item:last-child { border-bottom: none; }

.post-meta {
  font-family: var(--font-heading);
  font-size: 0.82rem;
  color: var(--color-text-muted);
  margin-bottom: 0.15rem;
}

.post-title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
}

.post-title a { color: var(--color-text); }
.post-title a:hover { color: var(--color-accent); }

.post-summary {
  font-size: 0.92rem;
  color: var(--color-text-light);
  margin-top: 0.3rem;
}

/* --- Single page --- */
.page-header { margin-bottom: 1.8rem; }
.page-header h1 { font-size: 1.7rem; margin-bottom: 0.3rem; }
.page-header .post-meta { font-size: 0.85rem; }

.page-content { font-size: 1rem; }
.page-content p { margin-bottom: 1.1rem; }

.page-content img {
  max-width: 100%;
  height: auto;
  border-radius: 3px;
  margin: 1.2rem 0;
}

.page-content blockquote {
  border-left: 3px solid var(--color-accent);
  padding-left: 1.2rem;
  margin: 1.2rem 0;
  color: var(--color-text-light);
  font-style: italic;
}

.page-content code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  background: var(--color-bg-alt);
  padding: 0.12em 0.35em;
  border-radius: 3px;
}

.page-content pre {
  background: var(--color-bg-alt);
  padding: 1rem;
  border-radius: 4px;
  overflow-x: auto;
  margin: 1.2rem 0;
}

.page-content pre code { background: none; padding: 0; }

.page-content ul,
.page-content ol {
  margin-bottom: 1.1rem;
  padding-left: 1.5em;
}

.page-content ul ul,
.page-content ol ul,
.page-content ul ol {
  padding-left: 1.5em;
  margin-bottom: 0;
}
/* --- Item cards --- */
.item-card {
  margin-bottom: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border-light);
}

.item-card:last-child { border-bottom: none; }
.item-card h3 { margin-top: 0; margin-bottom: 0.2rem; }
.item-card h3 a { color: var(--color-text); }
.item-card h3 a:hover { color: var(--color-accent); }

.item-card .item-meta {
  font-family: var(--font-heading);
  font-size: 0.82rem;
  color: var(--color-text-muted);
  margin-bottom: 0.4rem;
}

.item-card p {
  font-size: 0.92rem;
  color: var(--color-text-light);
}

/* --- About page: two-column layout --- */
.about-layout {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 2rem;
  align-items: start;
}

.about-portrait img {
  width: 100%;
  max-width: 220px;
  height: auto;
  border-radius: 3px;
}

.about-content h2 {
  font-size: 1.2rem;
  color: var(--color-accent);
  margin-top: 0;
}

.about-content h3 {
  font-size: 1.05rem;
  color: var(--color-accent);
}

/* --- Footer: three columns, round photo, compact --- */
.site-footer {
  background: var(--color-bg-footer);
  color: var(--color-bg-footer-text);
  padding: 1.8rem 0 1rem;
  margin-top: auto;
  font-size: 0.82rem;
  line-height: 1.55;
}

.site-footer a { color: #a8c4e0; }
.site-footer a:hover { color: #fff; }

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing);
  display: grid;
  grid-template-columns: 1.2fr 1.6fr 0.7fr;
  gap: 1.8rem;
}

.footer-col h3 {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 600;
  color: #eee;
  margin-bottom: 0.5rem;
}

.footer-col p {
  font-size: 0.8rem;
  margin-bottom: 0.25rem;
}

/* Round photo in footer, text wraps around it */
.footer-about-wrap {
  overflow: hidden;
}

.footer-portrait {
  float: left;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0.15rem 0.8rem 0.4rem 0;
  border: 2px solid #555;
}

.footer-contact-line {
  font-size: 0.8rem;
  margin-bottom: 0.2rem;
}

.footer-bottom {
  max-width: var(--max-width);
  margin: 1rem auto 0;
  padding: 0.7rem var(--spacing) 0;
  border-top: 1px solid #555;
  font-family: var(--font-heading);
  font-size: 0.72rem;
  color: #888;
  text-align: center;
}

.footer-bottom a { color: #999; }
.footer-bottom a:hover { color: #fff; }

/* --- Tags --- */
.tag {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 0.72rem;
  color: var(--color-text-muted);
  background: var(--color-bg-alt);
  padding: 0.1rem 0.45rem;
  border-radius: 2px;
  margin-right: 0.2rem;
}

hr {
  border: none;
  border-top: 1px solid var(--color-border-light);
  margin: 2rem 0;
}

/* --- Tags: subtle inline links like [Abstract]/[PDF] --- */
.post-tags {
  margin-top: 0.35rem;
}

.tag-link {
  font-family: var(--font-heading);
  font-size: 0.78rem;
  color: var(--color-link);
  margin-right: 0.15em;
}

.tag-link:hover {
  color: var(--color-link-hover);
}

.tag-link::before {
  content: "[";
  color: var(--color-text-muted);
}

.tag-link::after {
  content: "]";
  color: var(--color-text-muted);
}

/* --- Tag cloud page --- */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  line-height: 2;
}

.tag-cloud-item {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  color: var(--color-link);
  padding: 0.2rem 0.6rem;
  border: 1px solid var(--color-border-light);
  border-radius: 3px;
  transition: all 0.15s ease;
}

.tag-cloud-item:hover {
  background: var(--color-bg-alt);
  color: var(--color-link-hover);
}

.tag-count {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* --- Publication type statistics line --- */
.pub-type-stats {
  font-family: var(--font-heading);
  font-size: 0.88rem;
  color: var(--color-text-light);
  margin-bottom: 2rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid var(--color-border-light);
}

.pub-type-stats a {
  color: var(--color-link);
}

.pub-type-stats a:hover {
  color: var(--color-link-hover);
}

/* --- Responsive --- */
@media (max-width: 700px) {
  :root { --font-size-base: 16px; }

  .site-header-inner { flex-wrap: wrap; }
  .nav-toggle { display: block; }
  .site-nav {
    display: none; flex-direction: column;
    width: 100%; gap: 0.7rem; padding-top: 0.7rem;
  }
  .site-nav.open { display: flex; }

  .hero-intro {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

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

  .about-layout { grid-template-columns: 1fr; }
  .about-portrait { text-align: center; }
  .about-portrait img { max-width: 180px; }

  .footer-inner { grid-template-columns: 1fr; gap: 1rem; }
  .footer-portrait { float: none; display: block; margin: 0 auto 0.5rem; }
}

/* ============================================================
   Lehre / Teaching
   ============================================================ */

.teaching-section-label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin: 1.5rem 0 0.5rem;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 0.3rem;
}

.teaching-entry {
  margin-bottom: 1.2rem;
  padding-bottom: 1.2rem;
  border-bottom: 1px solid var(--color-border);
}

.teaching-entry:last-child {
  border-bottom: none;
}

.teaching-meta {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  margin-bottom: 0.2rem;
}

.teaching-title {
  font-size: 1rem;
  font-weight: 500;
}

.teaching-title a {
  color: var(--color-link);
}

.teaching-title a:hover {
  color: var(--color-link-hover);
}

.teaching-summary {
  font-size: 0.88rem;
  color: var(--color-text-secondary, var(--color-text));
  margin-top: 0.25rem;
}

/* Teaching-Tabelle (Übersichtsseite) */
.teaching-semester-group {
  margin-bottom: 1.8rem;
}

.teaching-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 0.4rem;
}

.teaching-table tr {
  border-bottom: 1px solid var(--color-border);
}

.teaching-table tr:last-child {
  border-bottom: none;
}

.teaching-table td {
  padding: 0.45rem 0.5rem 0.45rem 0;
  vertical-align: top;
}

.teaching-type {
  width: 8rem;
  font-size: 0.82rem;
  color: var(--color-text-muted);
  white-space: nowrap;
  padding-right: 1rem !important;
}

.teaching-title {
  font-size: 0.95rem;
}

.teaching-title a {
  color: var(--color-link);
}

.teaching-title a:hover {
  color: var(--color-link-hover);
}

.teaching-title .post-tags {
  display: block;
  margin-top: 0.15rem;
}

.teaching-module {
  width: 8rem;
  font-size: 0.82rem;
  color: var(--color-text-muted);
  white-space: nowrap;
  padding-right: 1rem !important;
}

/* ============================================================
   Forschungsprojekte / Research Projects
   ============================================================ */

.project-meta {
  margin-bottom: 1.8rem;
  padding: 1rem 1.2rem;
  background: var(--color-bg-alt);
  border-radius: 4px;
  border-left: 3px solid var(--color-accent);
  font-size: 0.9rem;
  line-height: 1.6;
}

.project-meta-row {
  display: flex;
  gap: 0.8rem;
  padding: 0.25rem 0;
  border-bottom: 1px solid var(--color-border-light);
}

.project-meta-row:last-child {
  border-bottom: none;
}

.project-meta-label {
  flex-shrink: 0;
  width: 9rem;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.project-meta-value {
  color: var(--color-text);
}

.project-meta-value a {
  word-break: break-all;
}