:root {
  --bg: #fff;
  --fg: #111;
  --muted: #8a8a86;
  --side: 15rem;
  --pad: 1rem;
  --gap: .5rem;
  --font: "Helvetica Neue", Helvetica, Arial, system-ui, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: .75rem;
  line-height: 1.45;
  letter-spacing: .02em;
  background: var(--bg);
  color: var(--fg);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
a:hover, a:focus-visible { color: var(--muted); }
:focus-visible { outline: 1px solid var(--fg); outline-offset: 2px; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; margin: 0; padding: 0; }
h1, h2 { font: inherit; margin: 0; }
p { margin: 0 0 1em; }

.skip { position: absolute; left: -999rem; top: 0; background: var(--bg); padding: .5rem; z-index: 10; }
.skip:focus { left: 0; }

/* Seitenleiste */
.side {
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--side);
  padding: var(--pad);
  overflow-y: auto;
  text-transform: uppercase;
}
.name { display: inline-block; margin-bottom: 1.5rem; }
.menu-toggle { display: none; }
.project-list { margin-bottom: 1.5rem; }
.nav a { display: inline-block; padding: .05rem 0; }
.nav a[aria-current="page"], .nav a.is-hover { color: var(--muted); }

main { margin-left: var(--side); padding: var(--pad); min-height: calc(100vh - 3rem); }
main:focus { outline: none; }

/* Raster */
.grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.5rem var(--gap); }
.tile { display: block; }
.tile .ph, .tile img { width: 100%; transition: opacity .25s ease; }
.tile img { height: 100%; object-fit: cover; }
.tile .frame { overflow: hidden; }
.tile:hover .frame, .tile.is-hover .frame { opacity: .72; }
.caption { display: block; margin-top: .4rem; color: var(--muted); text-transform: uppercase; font-size: .625rem; letter-spacing: .04em; }
.tile:hover { color: inherit; }

/* Platzhalterflächen, solange es keine Bilder gibt */
.ph { background: var(--tone, #e9e6e1); }

/* Projektansicht */
.project { display: grid; grid-template-columns: minmax(0, 3fr) minmax(0, 2fr); gap: 2rem; align-items: start; }
.project-images { display: grid; gap: var(--gap); }
.project-images .ph, .project-images img { width: 100%; }
.project-info { position: sticky; top: var(--pad); text-transform: uppercase; }
.project-info h1 { margin-bottom: .25rem; }
.project-info .meta { color: var(--muted); margin-bottom: 1.5rem; }
.project-info .text { text-transform: none; max-width: 32rem; font-size: .8125rem; line-height: 1.55; }
.pager { display: flex; gap: 1.25rem; margin-top: 1.5rem; }

/* Textseiten */
.text-page { max-width: 34rem; font-size: .8125rem; line-height: 1.55; }
.text-page h1, .text-page h2 { text-transform: uppercase; font-size: .75rem; color: var(--muted); margin-bottom: 1rem; }
.text-page h2 { margin-top: 2.5rem; }
.text-page a { border-bottom: 1px solid currentColor; }

.foot { margin-left: var(--side); padding: var(--pad); color: var(--muted); text-transform: uppercase; font-size: .625rem; }

[hidden] { display: none !important; }

@media (max-width: 60rem) {
  .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .project { grid-template-columns: 1fr; }
  .project-info { position: static; order: -1; }
}

@media (max-width: 40rem) {
  :root { --side: 0rem; }
  .side {
    position: sticky; inset: auto; top: 0; width: auto; z-index: 5;
    background: var(--bg);
    display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline;
    overflow: visible;
  }
  .name { margin-bottom: 0; }
  .menu-toggle {
    display: inline-block; font: inherit; letter-spacing: inherit; text-transform: uppercase;
    color: inherit; background: none; border: 0; padding: 0; cursor: pointer;
  }
  .nav { display: none; flex-basis: 100%; padding-top: 1.25rem; max-height: 75vh; overflow-y: auto; }
  .nav.is-open { display: block; }
  .nav a { padding: .3rem 0; }
  main { padding-top: .5rem; }
}

@media (max-width: 26rem) {
  .grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto !important; }
}

/* 404 */
.placeholder { min-height: 100vh; display: grid; place-content: center; text-align: center; padding: 1rem; text-transform: uppercase; }
.placeholder h1 { margin-bottom: .5rem; }
.placeholder p { margin: .25rem 0; color: var(--muted); }