/* ============================================================
   Andreas Kraft — personal site
   Single stylesheet for all pages.
   ============================================================ */

:root {
  --accent: #7B1113;          /* deep maroon; swap for #BF5700 burnt orange */
  --ink: #1a1a1a;
  --ink-soft: #555;
  --rule: #e2e2e2;
  --bg: #fdfdfc;
  --maxw: 46rem;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 0 1.25rem 5rem;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.6 Georgia, "Times New Roman", serif;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: var(--maxw); margin: 0 auto; }

/* ------------------------------------------------ header / nav -- */

header.site {
  padding: 3rem 0 1.25rem;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 2.25rem;
}

header.site h1 {
  margin: 0;
  font-size: 1.9rem;
  letter-spacing: -0.01em;
  font-weight: normal;
}

header.site .affil {
  margin: 0.35rem 0 1.1rem;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

nav a {
  margin-right: 1.4rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink-soft);
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
}

nav a:hover { color: var(--accent); }
nav a.here { color: var(--ink); border-bottom-color: var(--accent); }

/* ------------------------------------------------------- text -- */

a { color: var(--accent); text-decoration: none; border-bottom: 1px solid rgba(123, 17, 19, 0.25); }
a:hover { border-bottom-color: var(--accent); }

h2 {
  font-size: 0.85rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  font-weight: 600;
  margin: 2.75rem 0 1rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--rule);
}

p { margin: 0 0 1.1rem; }

/* -------------------------------------------------- home intro -- */

.intro { display: flex; gap: 2rem; align-items: flex-start; }
.intro .bio { flex: 1; }

/* width/height attrs on the <img> reserve layout space; height:auto keeps the
   4:5 aspect ratio while CSS drives the displayed width. */
.portrait {
  width: 180px;
  height: auto;
  border-radius: 3px;
  flex-shrink: 0;
}

.contact {
  font-size: 0.95rem;
  color: var(--ink-soft);
  line-height: 1.9;
}

/* ----------------------------------------------------- papers -- */

.paper { margin-bottom: 1.6rem; }

.paper .title { font-weight: bold; }
.paper .title a { border-bottom-color: rgba(123, 17, 19, 0.3); }

.paper .meta {
  display: block;
  font-size: 0.92rem;
  color: var(--ink-soft);
  margin-top: 0.15rem;
}

.paper .status { font-style: italic; }

.paper details { margin-top: 0.45rem; }

.paper details summary {
  cursor: pointer;
  font-size: 0.82rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent);
  list-style: none;
}

.paper details summary::-webkit-details-marker { display: none; }
.paper details summary::before { content: "+ "; }
.paper details[open] summary::before { content: "\2212  "; }

.paper details p {
  margin: 0.6rem 0 0;
  font-size: 0.95rem;
  color: var(--ink-soft);
  padding-left: 1rem;
  border-left: 2px solid var(--rule);
}

/* ------------------------------------------------------ lists -- */

ul.plain { list-style: none; padding: 0; margin: 0; }
ul.plain li { margin-bottom: 0.9rem; }

.course { font-weight: bold; }
.course-meta { display: block; font-size: 0.92rem; color: var(--ink-soft); }

footer.site {
  margin-top: 4rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--rule);
  font-size: 0.85rem;
  color: var(--ink-soft);
}

/* ------------------------------------------------------ mobile -- */

@media (max-width: 34rem) {
  .intro { flex-direction: column-reverse; }
  .portrait { width: 130px; }
  nav a { margin-right: 1rem; font-size: 0.78rem; }
}