/* ============================================================
   danbischof.com — shared stylesheet
   Pure CSS, no frameworks, no build step required.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Source+Serif+4:ital,opsz,wght@0,8..60,400;0,8..60,600;1,8..60,400&display=swap');

:root {
  --accent:    #2c6496;
  --accent-h:  #1a4a72;
  --text:      #1a1a1a;
  --muted:     #555;
  --border:    #ddd;
  --bg:        #fafaf8;
  --bg-raised: #f2f2ef;
  --max-w:     760px;
}

/* ── Dark mode ── */
[data-theme="dark"] {
  --accent:    #6baed6;
  --accent-h:  #9ecae1;
  --text:      #e2e0dc;
  --muted:     #999;
  --border:    #2e2e2c;
  --bg:        #1a1a18;
  --bg-raised: #222220;
}
[data-theme="dark"] .abstract-text {
  background: var(--bg-raised);
  color: #bbb;
}
[data-theme="dark"] .badge-forthcoming { background: #1a2a3a; color: #6baed6; }
[data-theme="dark"] .badge-chapter     { background: #2a2a2a; color: #888; }
[data-theme="dark"] .badge-software    { background: #252518; color: #888; }
[data-theme="dark"] .badge-review      { background: #2a2010; color: #d4941a; }
[data-theme="dark"] .badge-request     { background: #2a1010; color: #c0392b; }
[data-theme="dark"] .project-card      { background: var(--bg-raised); }
[data-theme="dark"] footer             { color: #555; }
[data-theme="dark"] .page-intro        { color: #888; }

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

html { font-size: 17px; }

body {
  font-family: 'Source Serif 4', Georgia, serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
}

/* ── Navigation ── */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 0 1.5rem;
}
nav ul {
  max-width: var(--max-w);
  margin: 0 auto;
  list-style: none;
  display: flex;
  gap: 0;
  flex-wrap: wrap;
}
nav ul li a {
  display: block;
  padding: 1rem 0.65rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.15s;
}
nav ul li a:hover { color: var(--accent); }
nav ul li a.active {
  color: var(--accent);
  box-shadow: inset 0 -2px 0 var(--accent);
}

/* ── Page wrapper ── */
main {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 3rem 1.5rem 5rem;
}

/* ── Headings ── */
h1 {
  font-size: 1.6rem;
  font-weight: normal;
  letter-spacing: -0.01em;
  margin-bottom: 0.3rem;
}
h2 {
  font-size: 1rem;
  font-weight: normal;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.4rem;
  margin: 2.5rem 0 1.2rem;
}
h3 {
  font-size: 1rem;
  margin: 1.4rem 0 0.4rem;
}

/* ── Links ── */
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; color: var(--accent-h); }

/* ── About / landing page ── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 175px;
  column-gap: 2.5rem;
  align-items: start;
  margin-top: 1.5rem;
}
/* P1 beside photo */
.about-first {
  grid-column: 1;
  grid-row: 1;
}
/* Photo top-right */
.about-grid img {
  grid-column: 2;
  grid-row: 1;
  width: 100%;
  border-radius: 3px;
  display: block;
}
/* Rest spans full width below the photo */
.about-rest {
  grid-column: 1 / -1;
  grid-row: 2;
  margin-top: 1rem;
}
.about-first p,
.about-rest p { margin-bottom: 1rem; text-align: justify; hyphens: auto; }
.about-meta {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 1.2rem;
}
.about-meta a { color: var(--muted); }
.about-meta a:hover { color: var(--accent); }
.cv-link {
  display: block;
  width: fit-content;
  margin: 0.5rem auto 0;
  text-align: center;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.84rem;
  border: 1px solid var(--accent);
  color: var(--accent);
  padding: 0.3rem 0.85rem;
  border-radius: 2px;
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
}
.cv-link:hover {
  background: var(--accent);
  color: #fff;
  text-decoration: none;
}
.social-links {
  margin-top: 1.3rem;
  display: flex;
  gap: 1.2rem;
  flex-wrap: wrap;
  justify-content: center;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.82rem;
}
.social-links a {
  color: var(--muted);
  border-bottom: none;
  display: inline-flex;
  align-items: center;
  line-height: 1;
}
.social-links svg { width: 28px; height: 28px; }
.social-links a:hover { color: var(--accent); text-decoration: none; }
.social-links svg { display: block; }

/* ── Publications ── */
.pub-list {
  list-style: none;
  padding: 0;
}
.pub-list > li {
  counter-increment: pub-counter -1;
  position: relative;
  padding: 1rem 0 1rem 2.6rem;
  border-bottom: 1px solid var(--border);
  box-shadow: -3px 0 0 transparent;
  transition: box-shadow 0.18s;
}
.pub-list > li:hover {
  box-shadow: -3px 0 0 var(--accent);
}
.pub-list > li:last-child { border-bottom: none; }
.pub-list > li::before {
  content: counter(pub-counter) ".";
  position: absolute;
  left: 0;
  top: 1.05rem;
  color: var(--muted);
  font-size: 0.82rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  min-width: 2rem;
}
.pub-title {
  font-style: italic;
  margin-bottom: 0.2rem;
  line-height: 1.45;
}
.pub-authors {
  font-size: 0.87rem;
  color: var(--muted);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  margin-bottom: 0.2rem;
}
.pub-venue {
  font-size: 0.87rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  margin-bottom: 0.45rem;
}
.pub-links {
  display: flex;
  gap: 0.45rem;
  flex-wrap: wrap;
  align-items: center;
}
.pub-links a,
.pub-links summary {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.74rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  border: 1px solid var(--border);
  padding: 0.14rem 0.52rem;
  border-radius: 2px;
  color: var(--muted);
  text-decoration: none;
  cursor: pointer;
  user-select: none;
  transition: border-color 0.15s, color 0.15s;
  list-style: none;
}
.pub-links a:hover,
.pub-links summary:hover {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}
.pub-links details[open] summary {
  border-color: var(--accent);
  color: var(--accent);
}
.pub-links details { display: contents; }
.pub-links a.gallery-link {
  border-color: #b45309;
  color: #b45309;
}
.pub-links a.gallery-link:hover {
  border-color: #92400e;
  color: #92400e;
}
[data-theme="dark"] .pub-links a.gallery-link {
  border-color: #d97706;
  color: #d97706;
}
[data-theme="dark"] .pub-links a.gallery-link:hover {
  border-color: #fbbf24;
  color: #fbbf24;
}

.abstract-text {
  margin-top: 0.75rem;
  font-size: 0.87rem;
  line-height: 1.6;
  color: #333;
  background: var(--bg-raised);
  padding: 0.85rem 1rem;
  border-left: 3px solid var(--accent);
  border-radius: 0 2px 2px 0;
  text-align: justify;
  hyphens: auto;
}

/* badges */
.badge {
  display: inline-block;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.1rem 0.4rem;
  border-radius: 2px;
  vertical-align: middle;
  position: relative;
  top: -1px;
  margin-left: 0.3rem;
}
.badge-forthcoming { background: #e8f0f8; color: var(--accent); }
.badge-chapter     { background: #f0f0f0; color: #666; }
.badge-software    { background: #f5f5e8; color: #666; }
.badge-review      { background: #fff3d0; color: #e07b00; }
.badge-request     { background: #fde8e8; color: #c0392b; }

/* ── Project overview grid ── */
.project-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.8rem;
  margin-top: 0.5rem;
}
.project-card {
  border: 1px solid var(--border);
  border-radius: 3px;
  overflow: hidden;
  transition: box-shadow 0.15s;
  text-decoration: none;
  color: inherit;
  display: block;
  background: var(--bg);
}
.project-card:hover {
  box-shadow: 0 2px 12px rgba(0,0,0,0.1);
  text-decoration: none;
}
.project-card img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  display: block;
}
.project-card-body {
  padding: 1rem;
}
.project-card-title {
  font-size: 1rem;
  font-weight: normal;
  font-style: normal;
  margin-bottom: 0.25rem;
}
.project-card-desc {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.83rem;
  color: var(--muted);
  line-height: 1.45;
  margin-bottom: 0.5rem;
}
.project-card-footer {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.75rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.project-status {
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.7rem;
  padding: 0.1rem 0.4rem;
  border-radius: 2px;
  color: #fff;
  background: var(--accent);
}
.project-status.finished { background: var(--muted); }
.project-card-more { color: var(--accent); }

/* ── Individual project page ── */
.project-hero {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-radius: 3px;
  display: block;
  margin-bottom: 1.5rem;
}
.project-back {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.83rem;
  color: var(--muted);
  margin-bottom: 1.5rem;
  display: inline-block;
}
.project-back:hover { color: var(--accent); text-decoration: none; }
.project-body { font-size: 0.95rem; }
.project-body p { margin-bottom: 0.85rem; text-align: justify; hyphens: auto; }
.project-body ul, .project-body ol {
  padding-left: 1.4rem;
  margin-bottom: 0.85rem;
}
.project-body li { margin-bottom: 0.25rem; font-size: 0.92rem; }
.project-body h3 {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin: 1.4rem 0 0.5rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.3rem;
}

/* ── Misc pub list (chapters/software – no counter) ── */
.pub-list-misc > li {
  counter-increment: none;
}
.pub-list-misc > li::before {
  content: "–";
}

/* ── Teaching ── */
.teaching-table {
  width: 100%;
  border-collapse: collapse;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.9rem;
  margin-bottom: 1rem;
}
.teaching-table tr td {
  padding: 0.6rem 0;
  vertical-align: top;
  border-bottom: 1px solid var(--border);
}
.teaching-table tr:last-child td { border-bottom: none; }
.tt-tag {
  white-space: nowrap;
  color: var(--muted);
  font-size: 0.80rem;
  width: 240px;
  min-width: 200px;
  padding-right: 1.5rem;
}

/* ── About page separator ── */
.about-sep {
  display: block;
  color: var(--border);
  font-size: 0.9rem;
  line-height: 1;
  margin: 0.25rem 0;
}

/* ── Page intro paragraph ── */
.page-intro {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.87rem;
  color: #666;
  margin-top: 0.3rem;
  margin-bottom: 1rem;
}

/* ── Bio page prose ── */
.bio-prose p {
  text-align: justify;
  hyphens: auto;
  margin-bottom: 1rem;
}
.bio-prose ol {
  padding-left: 2rem;
  margin: 0.8rem 0 1.2rem;
}
.bio-prose ol li {
  margin-bottom: 0.75rem;
  text-align: justify;
  hyphens: auto;
}

/* ── CV embed ── */
.cv-embed {
  margin-top: 2rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}


.cv-embed iframe {
  display: block;
  width: 100%;
  height: 75vh;
  border: none;
}

@media (max-width: 640px) {
  .cv-embed iframe { display: none; }
  .cv-embed-header::after {
    content: 'PDF preview not available on mobile.';
    display: block;
    padding: 1rem;
    font-size: 0.85rem;
    color: var(--muted);
  }
  .cv-embed { border-radius: 6px; }
}

/* ── CV / Bio table ── */
.cv-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0 2rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.9rem;
}
.cv-table tr + tr td { padding-top: 1rem; }
.cv-table td { vertical-align: top; padding-bottom: 0.5rem; }
.cv-year {
  white-space: nowrap;
  color: var(--muted);
  min-width: 120px;
  padding-right: 1.5rem;
  font-size: 0.85rem;
}

/* ── Photo colour tinting ── */
img[src$="extremism.jpg"] {
  filter: grayscale(100%) sepia(100%) hue-rotate(175deg) saturate(350%) brightness(0.85);
}

/* ── Footer ── */
footer {
  text-align: center;
  padding: 2rem 1rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.78rem;
  color: #aaa;
  border-top: 1px solid var(--border);
}

/* ── Publication topic filter ── */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0.6rem 0 1.6rem;
}
.filter-btn {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border: 1px solid var(--border);
  padding: 0.22rem 0.75rem;
  border-radius: 20px;
  cursor: pointer;
  background: none;
  color: var(--muted);
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}
.filter-btn:hover { border-color: var(--accent); color: var(--accent); }
.filter-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }
/* Hide counter numbers when a topic filter is active */
.filter-active .pub-list > li::before { visibility: hidden; }
/* Second-row filters */
.filter-break { width: 100%; height: 0; }

/* ── Theme toggle button ── */
.nav-toggle {
  margin-left: auto;
  display: flex;
  align-items: center;
}
#theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--muted);
  padding: 0.65rem 0.5rem;
  display: flex;
  align-items: center;
  transition: color 0.15s;
  line-height: 1;
}
#theme-toggle:hover { color: var(--accent); }
.icon-sun  { display: none; }
.icon-moon { display: block; }
[data-theme="dark"] .icon-sun  { display: block; }
[data-theme="dark"] .icon-moon { display: none; }

/* ── Responsive ── */
/* ── Hamburger button (hidden on desktop) ── */
.nav-burger {
  display: none;
}

@media (max-width: 640px) {
  /* Show hamburger, hide nav links by default */
  .nav-burger {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    width: 100%;
    padding: 0.7rem 1rem;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--muted);
  }
  .nav-burger:hover { color: var(--text); }

  nav ul {
    display: none;
    flex-direction: column;
    max-width: 100%;
    border-top: 1px solid var(--border);
    padding: 0.3rem 0;
  }
  #site-nav.open ul { display: flex; }

  nav ul li { width: 100%; }
  nav ul li a {
    padding: 0.85rem 1.2rem;
    font-size: 0.9rem;
    border-bottom: 1px solid var(--border);
  }
  .nav-toggle {
    margin-left: 0 !important;
    padding: 0.7rem 1.2rem;
    border-bottom: 1px solid var(--border);
  }

  /* Content layout */
  .about-grid { grid-template-columns: 1fr; }
  .about-grid img { width: 130px; margin: 0 auto; grid-column: 1; grid-row: auto; }
  .about-first, .about-rest { grid-column: 1; grid-row: auto; }
  .project-grid { grid-template-columns: 1fr; }
}