/* isaackobby.com — single stylesheet, no dependencies */
:root {
  --bg: #ffffff;
  --bg-soft: #f6f7f9;
  --text: #1c1f24;
  --muted: #5b6370;
  --line: #e3e6eb;
  --accent: #1f5fa8;
  --accent-soft: #e8f0fa;
  --chip: #eef1f5;
  --maxw: 940px;
  --radius: 10px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111418;
    --bg-soft: #181c22;
    --text: #e6e8eb;
    --muted: #9aa3ae;
    --line: #2a3038;
    --accent: #7fb2ef;
    --accent-soft: #1b2a3c;
    --chip: #222831;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 var(--font);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 12px; top: 12px; background: var(--bg); padding: 8px 12px; z-index: 100; border: 1px solid var(--line); }

/* Nav */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: saturate(160%) blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 58px; }
.brand { font-weight: 650; color: var(--text); letter-spacing: -0.01em; }
.brand:hover { text-decoration: none; }
.nav ul { list-style: none; display: flex; gap: 22px; margin: 0; padding: 0; }
.nav ul a { color: var(--muted); font-size: 0.92rem; }
.nav ul a:hover { color: var(--text); text-decoration: none; }
.menu-btn { display: none; background: none; border: 1px solid var(--line); border-radius: 8px; color: var(--text); padding: 6px 10px; font: inherit; font-size: 0.9rem; }
@media (max-width: 760px) {
  .menu-btn { display: block; }
  .nav ul { display: none; position: absolute; top: 58px; left: 0; right: 0; flex-direction: column; gap: 0; background: var(--bg); border-bottom: 1px solid var(--line); padding: 6px 20px 12px; }
  .nav ul.open { display: flex; }
  .nav ul a { display: block; padding: 9px 0; font-size: 1rem; }
}

/* Hero */
.hero { padding: 56px 0 40px; }
.hero .wrap { display: grid; grid-template-columns: 200px 1fr; gap: 40px; align-items: start; }
.hero img { width: 200px; height: 200px; border-radius: 50%; object-fit: cover; border: 1px solid var(--line); }
.hero h1 { font-family: var(--serif); font-size: 2.4rem; line-height: 1.15; margin: 0 0 6px; letter-spacing: -0.01em; font-weight: 600; }
.hero .role { color: var(--muted); margin: 0 0 18px; font-size: 1.02rem; }
.hero p { margin: 0 0 14px; }
.status {
  background: var(--accent-soft); border-left: 3px solid var(--accent);
  padding: 10px 14px; border-radius: 6px; font-size: 0.95rem; margin: 18px 0;
}
.links { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.btn {
  display: inline-block; padding: 7px 14px; border-radius: 999px;
  border: 1px solid var(--line); color: var(--text); font-size: 0.9rem; background: var(--bg);
}
.btn:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { color: #fff; filter: brightness(1.08); }
@media (prefers-color-scheme: dark) { .btn.primary { color: #0d1117; } .btn.primary:hover { color: #0d1117; } }
@media (max-width: 760px) {
  .hero { padding: 36px 0 24px; }
  .hero .wrap { grid-template-columns: 1fr; gap: 20px; }
  .hero img { width: 132px; height: 132px; }
  .hero h1 { font-size: 1.9rem; }
}

/* Sections */
section.block { padding: 36px 0; border-top: 1px solid var(--line); }
section.block h2 { font-family: var(--serif); font-size: 1.55rem; font-weight: 600; margin: 0 0 18px; letter-spacing: -0.005em; }
section.block h3 { font-size: 1.04rem; margin: 0 0 4px; font-weight: 650; }
.lede { color: var(--muted); margin-top: -8px; margin-bottom: 22px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 0; padding: 0; list-style: none; }
.chips li { background: var(--chip); border-radius: 999px; padding: 3px 12px; font-size: 0.86rem; }

/* News */
.news { list-style: none; padding: 0; margin: 0; }
.news li { display: grid; grid-template-columns: 92px 1fr; gap: 14px; padding: 7px 0; }
.news time { color: var(--muted); font-size: 0.9rem; font-variant-numeric: tabular-nums; padding-top: 1px; }
@media (max-width: 520px) { .news li { grid-template-columns: 1fr; gap: 0; } }

/* Research cards */
.dissertation { background: var(--bg-soft); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 22px; margin-bottom: 22px; }
.dissertation .kicker { text-transform: uppercase; letter-spacing: 0.06em; font-size: 0.75rem; color: var(--muted); font-weight: 600; }
.dissertation h3 { font-family: var(--serif); font-size: 1.2rem; font-weight: 600; margin: 4px 0 6px; }
.dissertation p { margin: 8px 0 0; }
.projects { display: grid; gap: 16px; }
.project { border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px; }
.project .meta { color: var(--muted); font-size: 0.88rem; margin-bottom: 8px; }
.project ul { margin: 8px 0 0; padding-left: 20px; }
.project li { margin: 4px 0; }
.finding { margin-top: 10px; font-size: 0.95rem; }
.finding strong { color: var(--accent); }

/* Publications */
.pubs h3.group { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); margin: 22px 0 8px; }
.pubs h3.group:first-of-type { margin-top: 0; }
.pub { padding: 10px 0; border-bottom: 1px dashed var(--line); }
.pub:last-child { border-bottom: 0; }
.pub .title { font-weight: 600; }
.pub .authors, .pub .venue { font-size: 0.93rem; color: var(--muted); }
.pub .authors b { color: var(--text); font-weight: 600; }
.pub .venue em { font-style: italic; }
.pub .plinks { margin-top: 4px; display: flex; gap: 8px; flex-wrap: wrap; }
.tag { font-size: 0.78rem; border: 1px solid var(--line); border-radius: 6px; padding: 1px 8px; color: var(--muted); }
a.tag:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }

/* Timeline entries (experience / education) */
.entry { display: grid; grid-template-columns: 1fr auto; gap: 2px 18px; padding: 12px 0; }
.entry + .entry { border-top: 1px dashed var(--line); }
.entry .when { color: var(--muted); font-size: 0.9rem; text-align: right; white-space: nowrap; }
.entry .org { color: var(--muted); font-size: 0.95rem; }
.entry ul { grid-column: 1 / -1; margin: 6px 0 0; padding-left: 20px; }
.entry li { margin: 3px 0; }
.entry .note { grid-column: 1 / -1; font-size: 0.93rem; color: var(--muted); }
@media (max-width: 520px) {
  .entry { grid-template-columns: 1fr; }
  .entry .when { text-align: left; }
}

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
@media (max-width: 760px) { .two-col { grid-template-columns: 1fr; } }
.plain { margin: 0; padding-left: 20px; }
.plain li { margin: 5px 0; }

.skills dt { font-weight: 600; margin-top: 10px; }
.skills dd { margin: 2px 0 0; color: var(--muted); }

.code-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px 28px; list-style: none; padding: 0; margin: 0; }
.code-list li { padding: 6px 0; }
.code-list span { display: block; color: var(--muted); font-size: 0.92rem; }
@media (max-width: 620px) { .code-list { grid-template-columns: 1fr; } }

.cv-row { display: flex; flex-wrap: wrap; gap: 12px; }
.cv-card { flex: 1 1 260px; border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; }
.cv-card p { margin: 4px 0 12px; color: var(--muted); font-size: 0.93rem; }

footer { border-top: 1px solid var(--line); padding: 28px 0 40px; color: var(--muted); font-size: 0.88rem; }
footer .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }

@media print {
  .nav, .links, footer, .menu-btn { display: none !important; }
  section.block { border: 0; padding: 14px 0; }
}