/* ==========================================================
   Johannes M. Henn — personal website
   Clean lines, geometric accents. Edit colors below.
   ========================================================== */
:root {
  --paper: #faf9f6;
  --ink: #1c2431;
  --ink-soft: #46536a;
  --accent: #b3402a;      /* vermilion ink */
  --accent-dark: #8e2f1d;
  --teal: #2a6f77;
  --line: #ddd8cf;
  --card: #ffffff;
  --maxw: 1080px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Avenir Next", "Segoe UI", "Helvetica Neue", system-ui, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
}
a { color: var(--accent-dark); text-decoration: none; border-bottom: 1px solid rgba(179,64,42,.35); }
a:hover { color: var(--accent); border-bottom-color: var(--accent); }

/* ---------- navigation ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(250,249,246,.95);
  backdrop-filter: blur(6px);
  border-bottom: 2px solid var(--ink);
}
.nav-inner {
  max-width: var(--maxw); margin: 0 auto; padding: .65rem 1.2rem;
  display: flex; align-items: center; gap: 1rem; flex-wrap: wrap;
}
.nav .brand {
  font-weight: 700; font-size: 1.05rem; letter-spacing: .02em;
  border: none; color: var(--ink); margin-right: auto; white-space: nowrap;
}
.nav .brand span { color: var(--accent); }
.nav ul { list-style: none; display: flex; gap: .9rem; margin: 0; padding: 0; flex-wrap: wrap; }
.nav ul a {
  border: none; color: var(--ink-soft); font-size: .92rem; font-weight: 500;
  padding-bottom: 2px;
}
.nav ul a:hover, .nav ul a.active { color: var(--accent); box-shadow: 0 2px 0 var(--accent); }

/* ---------- layout ---------- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 1.2rem; }
main { padding-bottom: 3rem; }
section { margin: 2.6rem 0; }

h1, h2, h3 { line-height: 1.25; letter-spacing: .01em; }
h1 { font-size: 2.3rem; margin: .2em 0 .3em; font-weight: 700; }
h2 {
  font-size: 1.45rem; margin-top: 2.2rem; font-weight: 700;
  display: inline-block; padding-bottom: 8px;
  background: url("../img/underline.svg") no-repeat left bottom / 100% 10px;
}
h3 { font-size: 1.12rem; margin-bottom: .3rem; }
.lead { font-size: 1.15rem; color: var(--ink-soft); max-width: 46rem; }
.muted { color: var(--ink-soft); font-size: .95rem; }

/* ---------- hero ---------- */
.hero {
  display: grid; grid-template-columns: 1.15fr .85fr; gap: 2.5rem;
  align-items: center; padding: 3rem 0 1.5rem; position: relative;
}
.hero .kicker {
  text-transform: uppercase; letter-spacing: .18em; font-size: .8rem;
  color: var(--accent); font-weight: 600;
}
.hero-photo { position: relative; justify-self: center; }
.hero-photo img {
  width: 100%; max-width: 360px; display: block;
  border: 3px solid var(--ink); border-radius: 2px;
}
.hero-deco {
  position: absolute; right: -60px; top: -40px; width: 260px; opacity: .12;
  pointer-events: none; z-index: -1;
}

/* ---------- cards ---------- */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 1rem; margin-top: 1.2rem; }
.card {
  background: var(--card); border: 2px solid var(--ink); border-radius: 3px;
  padding: 1rem 1.1rem; position: relative;
  box-shadow: 4px 4px 0 rgba(28,36,49,.12);
}
.card h3 { margin-top: 0; }
.card h3 a { border: none; color: var(--ink); }
.card h3 a:hover { color: var(--accent); }
.card p { margin: .3rem 0 0; font-size: .95rem; color: var(--ink-soft); }
.card .tag {
  display: inline-block; font-size: .72rem; text-transform: uppercase; letter-spacing: .12em;
  color: var(--accent); font-weight: 700; margin-bottom: .35rem;
}

/* ---------- figures ---------- */
figure { margin: 1.5rem 0; }
figure img { width: 100%; display: block; border: 3px solid var(--ink); border-radius: 2px; }
figcaption { font-size: .88rem; color: var(--ink-soft); margin-top: .45rem; }
.fig-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; }
.float-right { float: right; width: 44%; margin: .3rem 0 1rem 1.6rem; }

/* ---------- lists / talks ---------- */
.talk-list { list-style: none; padding: 0; }
.talk-list li {
  border-left: 3px solid var(--accent); padding: .5rem 0 .5rem 1rem; margin: .9rem 0;
  background: linear-gradient(90deg, rgba(179,64,42,.05), transparent 60%);
}
.talk-list .title { font-weight: 600; }
.talk-list .meta { font-size: .9rem; color: var(--ink-soft); }

.link-row { display: flex; flex-wrap: wrap; gap: .6rem; margin-top: 1rem; padding: 0; list-style: none; }
.link-row a {
  border: 2px solid var(--ink); border-radius: 999px; padding: .25rem .9rem;
  font-size: .88rem; font-weight: 600; color: var(--ink); background: var(--card);
}
.link-row a:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- video cards ---------- */
.video-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; margin: 1.2rem 0; }
.video-card {
  display: flex; flex-direction: column; justify-content: flex-end; gap: .4rem;
  position: relative; min-height: 190px; padding: 1.1rem 1.2rem;
  border: 3px solid var(--ink); border-radius: 3px;
  background: #161e2c url("../img/polytope.svg") no-repeat right -70px top -70px / 280px;
  color: #fff; text-decoration: none;
  box-shadow: 4px 4px 0 rgba(28,36,49,.12);
}
.video-card:hover { border-color: var(--accent); color: #fff; }
.video-card .play {
  position: absolute; top: 1rem; left: 1.1rem;
  width: 52px; height: 52px; border-radius: 50%;
  background: var(--accent); display: flex; align-items: center; justify-content: center;
}
.video-card .play::after {
  content: ""; margin-left: 4px;
  border-left: 16px solid #fff; border-top: 10px solid transparent; border-bottom: 10px solid transparent;
}
.video-card .vtitle { font-weight: 700; line-height: 1.35; }
.video-card .vmeta { font-size: .85rem; color: #c6cddb; }
@media (max-width: 820px) { .video-cards { grid-template-columns: 1fr; } }

/* ---------- callouts ---------- */
.note {
  border: 2px solid var(--teal); border-radius: 3px; background: #eef5f5;
  padding: .9rem 1.1rem; margin: 1.2rem 0; font-size: .97rem;
}
.todo {
  border: 2px dashed #c9a227; border-radius: 3px; background: #fdf7e3;
  padding: .6rem 1rem; margin: 1rem 0; font-size: .9rem; color: #6b5a14;
}
.todo::before { content: "To add: "; font-weight: 700; }

dl.cv { margin: 0; }
dl.cv dt { float: left; width: 8.5rem; font-weight: 600; color: var(--accent-dark); clear: left; }
dl.cv dd { margin: 0 0 .55rem 9.5rem; }

/* ---------- footer ---------- */
footer {
  border-top: 2px solid var(--ink); margin-top: 3rem; padding: 1.6rem 0 2.2rem;
  font-size: .9rem; color: var(--ink-soft); background: #f3f1ec;
}
footer .wrap { display: flex; flex-wrap: wrap; gap: 1.5rem; justify-content: space-between; }

/* ---------- responsive ---------- */
@media (max-width: 820px) {
  .hero { grid-template-columns: 1fr; padding-top: 2rem; }
  .hero-photo { order: -1; }
  .fig-row { grid-template-columns: 1fr; }
  .float-right { float: none; width: 100%; margin: 1rem 0; }
  dl.cv dt { float: none; width: auto; }
  dl.cv dd { margin-left: 0; margin-bottom: .8rem; }
}