/* ==========================================================
   leonhardgrabe.github.io — single stylesheet
   Change --accent to re-colour the whole site.
   ========================================================== */

:root {
  --accent: #1d3f6e;        /* links, titles, buttons */
  --accent-soft: #eef2f8;   /* button hover background on light */
  --text: #111;
  --muted: #555;
  --bg: #fff;
  --rule: #e3e6ea;
  --sidebar: 260px;
}

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

html { overflow-y: scroll; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

a { color: var(--accent); }
a:hover { text-decoration-thickness: 2px; }

/* ---------- Layout: sidebar + main ---------- */
.page {
  max-width: 960px;
  margin: 0 auto;
  padding: 80px 24px 48px;
  display: flex;
  gap: 56px;
  align-items: flex-start;
}

.sidebar { flex: 0 0 var(--sidebar); }
.main    { flex: 1; min-width: 0; }

/* ---------- Sidebar ---------- */
.portrait {
  display: block;
  width: 100%;
  max-width: var(--sidebar);
  height: auto;
  margin-bottom: 1.25rem;
}

.sidebar .name-mobile { display: none; }

.position { line-height: 1.45; margin-bottom: 0.75rem; }
.position span { display: block; }
.position .role { font-weight: 600; }

.email { text-decoration: none; }

.socials { display: flex; gap: 8px; margin-top: 1rem; }

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--accent);
  border-radius: 3px;
  color: var(--accent);
  transition: background-color .15s, color .15s;
}
.icon-btn:hover { background: var(--accent); color: #fff; }
.icon-btn svg { width: 17px; height: 17px; display: block; }

/* ---------- Main column ---------- */
h1 { font-size: 2rem; line-height: 1.2; margin-bottom: 0.9rem; }

.tabs { display: flex; margin-bottom: 1.75rem; border-bottom: 1px solid var(--rule); }
.tabs a {
  padding: 6px 18px 6px;
  text-decoration: none;
  font-weight: 500;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}
.tabs a:first-child { padding-left: 0; }
.tabs a:hover { color: var(--text); }
.tabs a[aria-current="page"] { border-bottom-color: var(--accent); }

h2 {
  font-size: 1.35rem;
  margin: 2.25rem 0 1rem;
}
.main h2:first-of-type { margin-top: 0; }

p { margin-bottom: 1rem; }

/* ---------- Paper entries ---------- */
.paper { margin-bottom: 1.9rem; line-height: 1.45; }

.paper-title {
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 0.1rem;
}

.paper-meta { color: var(--text); }
.paper-meta a { color: inherit; text-decoration: none; }
.paper-meta a:hover { text-decoration: underline; }
.venue { font-style: italic; }
.award { color: var(--muted); font-size: 0.95rem; }
.award::before { content: "★ "; color: var(--accent); }

.buttons { margin-top: 0.4rem; display: flex; flex-wrap: wrap; gap: 6px; }

.btn {
  display: inline-block;
  font: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.6;
  padding: 0 10px;
  border: 1px solid var(--accent);
  border-radius: 3px;
  background: transparent;
  color: var(--accent);
  text-decoration: none;
  cursor: pointer;
  transition: background-color .15s, color .15s;
}
.btn:hover,
.btn[aria-expanded="true"] { background: var(--accent); color: #fff; }

/* external links get a small arrow */
a.btn[target="_blank"]::after { content: " ↗"; font-size: 0.85em; }

/* Placeholder links (href="#") — visible while editing, delete .todo when done */
.btn.todo { border-style: dashed; }

/* Collapsible panels under a paper */
.panel {
  margin-top: 0.7rem;
  padding: 0.1rem 0 0.1rem 1rem;
  border-left: 3px solid var(--accent);
  line-height: 1.5;
}
.panel[hidden] { display: none; }
.panel p { margin: 0; }
.coverage-list a { white-space: nowrap; text-decoration: none; }
.coverage-list a:hover { text-decoration: underline; }

/* ---------- Footer ---------- */
.footer { margin-top: 3rem; color: var(--muted); font-size: 0.85rem; }

/* ---------- Mobile ---------- */
@media (max-width: 760px) {
  .page { flex-direction: column; gap: 24px; padding: 28px 16px 40px; }
  .sidebar { flex: none; width: 100%; text-align: center; }
  .portrait { max-width: 200px; margin: 0 auto 1rem; }
  .sidebar .name-mobile { display: block; font-size: 1.6rem; font-weight: 700; margin-bottom: 0.5rem; }
  .main .name-desktop { display: none; }
  .socials { justify-content: center; }
  .tabs { justify-content: center; }
  .tabs a:first-child { padding-left: 18px; }
  h2 { font-size: 1.15rem; }
}