/* gslindenmeyer.github.io: one column, Instrument Sans, navy links, subtle motion. */

/* Light: warm paper. Dark (the default, set on <html>): near-black. */
:root {
  --bg: #faf7f2;
  --fg: #2d2d2d;
  --muted: #5f5a54;
  --soft: #f0ebe3;
  --accent: #234b86;
  color-scheme: light;
  --font: "Instrument Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --measure: 1000px;
  --gutter: 28px;
  --rise: 6px;
  --ease: cubic-bezier(.2, .7, .2, 1);
}
:root[data-theme="dark"] {
  --bg: #151618;
  --fg: #eaebee;
  --muted: #a2a5ac;
  --soft: #1e2023;
  --accent: #9dbcec;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.65;
}
img { max-width: 100%; height: auto; }
p { margin: 0; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

a, summary {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  text-decoration-color: color-mix(in srgb, var(--accent) 40%, transparent);
  transition: text-decoration-color .2s;
}
a:hover, summary:hover { text-decoration-color: var(--accent); }

/* ---------- header ---------- */
.bar {
  position: sticky;
  top: 0;
  z-index: 5;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}
.nav {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 16px var(--gutter);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 15px;
}
.nav .who { font-weight: 600; color: var(--fg); text-decoration: none; }
.home .nav .who { visibility: hidden; }
.menu { display: flex; gap: 22px; flex-wrap: wrap; }
.menu a { position: relative; color: var(--muted); text-decoration: none; }
.menu a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -4px;
  height: 1.5px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s ease;
}
.menu a:hover { color: var(--fg); }
.menu a:hover::after, .menu a[aria-current]::after { transform: scaleX(1); }
.menu a[aria-current] { color: var(--fg); }
.menu { align-items: center; }

/* theme toggle: shows the sun in dark mode, the moon in light mode */
.theme-toggle {
  display: inline-grid;
  place-items: center;
  width: 32px; height: 32px;
  margin: -6px -6px -6px 0;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: color .2s, background-color .2s, transform .4s var(--ease);
}
.theme-toggle:hover { color: var(--fg); background: var(--soft); }
.theme-toggle:active { transform: rotate(20deg); }
.theme-toggle .icon-moon { display: none; }
:root:not([data-theme="dark"]) .theme-toggle .icon-sun { display: none; }
:root:not([data-theme="dark"]) .theme-toggle .icon-moon { display: block; }
body { transition: background-color .3s ease, color .3s ease; }

/* ---------- layout ---------- */
.main {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 20px var(--gutter) 72px;
  display: grid;
  gap: 56px;
}
.foot {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 0 var(--gutter) 40px;
  font-size: 14px;
  color: var(--muted);
}

/* ---------- home: name on top, photo + links on the left, everything else on the right ---------- */
.home .main { gap: 28px; }
.name {
  font-size: clamp(2rem, 4vw, 2.5rem);
  line-height: 1.12;
  font-weight: 600;
  letter-spacing: -0.015em;
  margin: 0;
  text-wrap: balance;
}
.split {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 56px;
  align-items: start;
}
.side { position: sticky; top: 84px; display: grid; gap: 22px; }
.photo { display: block; width: 260px; border-radius: 3px; }
.contact { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; font-size: 15.5px; color: var(--muted); }
.body { display: grid; gap: 56px; min-width: 0; }
.bio { max-width: 62ch; }
.bio p + p { margin-top: 12px; }

/* ---------- sections and papers ---------- */
.sec { display: grid; gap: 22px; }
.sec > h2 { font-size: 1.15rem; font-weight: 600; margin: 0; }
.group { display: grid; gap: 16px; }
.group + .group { margin-top: 22px; }
.group > h3 { font-size: 14px; font-weight: 500; color: var(--muted); margin: 0; }
.entry { display: grid; gap: 2px; }
.entry .t { font-weight: 600; line-height: 1.4; text-wrap: pretty; transition: color .25s; }
.entry:hover .t { color: var(--accent); }
.entry .m { color: var(--muted); font-size: 15.5px; }
.links { display: flex; gap: 6px 18px; flex-wrap: wrap; font-size: 15px; margin-top: 3px; }
details > summary { cursor: pointer; display: inline; list-style: none; }
details > summary::-webkit-details-marker { display: none; }
.abs {
  font-size: 15.5px;
  margin-top: 8px;
  padding: 12px 14px;
  background: var(--soft);
  border-radius: 4px;
  color: var(--fg);
}
details[open] .abs { animation: open .2s ease; }

/* ---------- inner pages ---------- */
.page { display: grid; gap: 18px; max-width: 760px; }
.page > h1 { font-size: 2rem; line-height: 1.15; font-weight: 600; letter-spacing: -0.01em; margin: 0; }
.lede { color: var(--muted); max-width: 60ch; }
.page h2 { font-size: 1.15rem; font-weight: 600; margin: 30px 0 0; line-height: 1.4; }
.page .meta { color: var(--muted); font-size: 15.5px; margin-top: -12px; }
.page ul { margin: 0; padding-left: 0; list-style: none; display: grid; gap: 4px; }
.page li strong { font-weight: 600; }
.page .group:first-of-type { margin-top: 10px; }
.note { color: var(--muted); font-size: 15px; font-style: italic; }

/* ---------- motion (subtle); content is visible without it ---------- */
@keyframes rise { from { opacity: 0; transform: translateY(var(--rise)); } to { opacity: 1; transform: none; } }
@keyframes drop { from { opacity: 0; transform: translateY(-100%); } to { opacity: 1; transform: none; } }
@keyframes open { from { opacity: 0; transform: translateY(-3px); } to { opacity: 1; transform: none; } }
.bar { animation: drop .6s ease both; }
.name { animation: rise .7s .10s var(--ease) both; }
.side .photo { animation: rise .8s .20s var(--ease) both; }
.contact { animation: rise .7s .34s var(--ease) both; }
.bio { animation: rise .7s .26s var(--ease) both; }
.body > .sec:first-of-type { animation: rise .7s .40s var(--ease) both; }
.page { animation: rise .7s .10s var(--ease) both; }
.entry, .group > h3 { transition: opacity .6s ease, transform .6s var(--ease); }
.reveal { opacity: 0; transform: translateY(var(--rise)); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}

/* ---------- phones ---------- */
@media (max-width: 620px) {
  :root { --gutter: 18px; }
  .main { gap: 44px; }
  .split { grid-template-columns: 1fr; gap: 28px; }
  .side { position: static; grid-template-columns: 140px minmax(0, 1fr); align-items: end; gap: 18px; }
  .photo { width: 140px; }
  .contact { font-size: 15px; }
  .body { gap: 44px; }
}