/* Sizes are taken from a 1728px-wide design and scale down with the viewport. */

/* Registered so the colors themselves animate: everything using them
   (footer, fade, circles) changes in sync when switching views. */
@property --bg { syntax: "<color>"; inherits: true; initial-value: #fff; }
@property --fg { syntax: "<color>"; inherits: true; initial-value: #000; }

:root {
  --blue: #0000ff;
  --bg: #fff;
  --fg: #000;

  --pad: clamp(16px, 2.78vw, 48px);
  --gap: clamp(16px, 2.43vw, 42px);
  --nav-fs: calc(var(--fs-l) * 1.15);
  --num: calc(var(--nav-fs) * 1.2);
  --num-gap: calc(var(--nav-fs) * 0.55);
  --indent: calc(var(--num) + var(--num-gap));

  --fs-l: clamp(20px, 1.74vw, 32px);
  --fs-m: clamp(15px, 1.16vw, 20px);
  --fs-s: clamp(13px, 0.98vw, 17px);

  --mono: "IBM Plex Mono", ui-monospace, monospace;
}

body[data-view="home"] { --bg: var(--blue); --fg: #fff; }
body[data-view="info"] { --bg: #000; --fg: #fff; }
body[data-section="web"] { --bg: #ebf46d; }

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100svh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--mono);
  font-size: var(--fs-l);
  line-height: 1.35;
  letter-spacing: -0.02em;
  -webkit-font-smoothing: antialiased;
  transition: --bg 0.45s ease, --fg 0.45s ease;
}

a { color: inherit; text-decoration: none; }
h2, p, dl, dd, figure { margin: 0; }
h2 { font: inherit; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
[hidden] { display: none !important; }

/* Fixed rows so hiding the nav doesn't shift main/footer up */
main { grid-row: 2; }
.footer { grid-row: 3; }

.mono { font-size: var(--fs-m); }

:focus-visible { outline: 2px solid currentColor; outline-offset: 4px; }

/* Shared two-column grid */
.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: var(--gap);
  padding-inline: var(--pad);
}

/* Top nav */
.nav { padding-top: clamp(20px, 2.2vw, 38px); }
body[data-view="info"] .nav { display: none; }

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: var(--num-gap);
  justify-self: start;
  font-size: var(--nav-fs);
}

.num {
  flex: none;
  display: grid;
  place-items: center;
  width: var(--num);
  height: var(--num);
  border: 2.25px solid currentColor;
  border-radius: 50%;
  font-size: calc(var(--nav-fs) * 0.75);
  line-height: 1;
  letter-spacing: 0;
  text-box: trim-both cap alphabetic;
  transition: background-color 0.2s ease, color 0.2s ease;
}
.nav-link:hover .num,
.nav-link:active .num,
.nav-link[aria-current] .num {
  background: var(--fg);
  color: var(--bg);
}

/* Work slider */
.work {
  padding-inline: var(--pad);
  padding-left: calc(var(--pad) + var(--indent));
  padding-top: clamp(40px, 4.5vw, 78px);
  padding-bottom: 48px;
}

.label { margin-bottom: clamp(28px, 2.9vw, 50px); }

/* Projects stack down the page, each with its own slider */
.projects { display: grid; row-gap: clamp(72px, 8vw, 140px); }

/* Media column on the left, project caption beside it at the bottom */
.slider {
  display: grid;
  grid-template-columns: min(47.8vw, 1100px) minmax(0, 1fr);
  column-gap: clamp(24px, 3vw, 56px);
}
.slider-head, .slider-frame { grid-column: 1; }

.slider-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 0.4em;
  font-size: var(--fs-m);
}

.slider-controls {
  display: flex;
  align-items: center;
  gap: 1.1em;
}
.arrow { font-size: 1.4em; line-height: 1; padding: 0 2px; }
.arrow:disabled { opacity: 0.25; cursor: default; }
.slider-count { font-variant-numeric: tabular-nums; }

.slider-frame {
  aspect-ratio: 3 / 2;
  background: #d9d9d9;
  overflow: hidden;
}
.slider-img,
.slider-video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity 0.25s ease;
}
.slider-img.is-loading { opacity: 0; }

.slider-caption {
  grid-column: 2;
  grid-row: 2;
  align-self: end;
  max-width: 30em;
  font-size: var(--fs-s);
  line-height: 1.5;
}
.caption-sub { font-size: inherit; margin-bottom: 0.6em; }
.caption-link {
  display: inline-block;
  margin-top: 1em;
  transition: opacity 0.2s ease;
}
.caption-link:hover { opacity: 0.6; }

/* Information */
.info {
  padding-top: clamp(24px, 2.6vw, 45px);
  padding-bottom: 48px;
  align-items: start;
}

/* Information: CV with thumbnails on the left, running bio on the right */
.cv {
  font-size: var(--fs-s);
  line-height: 1.45;
  display: grid;
  row-gap: 2.2em;
  padding-top: clamp(80px, 9vw, 160px);
}
.cv > div {
  display: grid;
  grid-template-columns: minmax(7em, 13em) 1fr;
  column-gap: 1em;
  align-items: start;
}
.cv dd { grid-column: 2; }
.cv p { margin-top: 0.9em; }
.cv a { transition: opacity 0.2s ease; }
.cv a:hover { opacity: 0.6; }

.about {
  font-size: clamp(22px, 2vw, 38px);
  line-height: 1.45;
  text-align: left;
  max-width: 32em;
  display: grid;
  gap: 1.1em;
}
.about b { font-weight: 400; }
.about-contact { margin-top: 1em; }
.about a, .imprint a { transition: opacity 0.2s ease; }
.about a:hover, .imprint a:hover { opacity: 0.6; }

/* Impressum sits at the bottom of the info page, in small type */
.imprint-label,
.imprint {
  grid-row: 2;
  font-size: var(--fs-s);
  line-height: 1.45;
  padding-top: clamp(96px, 12vw, 220px);
}
.imprint { display: grid; gap: 1em; max-width: 34em; padding-bottom: 30vh; }

/* Footer */
.footer {
  position: sticky;
  bottom: 0;
  z-index: 1;
  align-items: end;
  padding-bottom: clamp(20px, 1.85vw, 32px);
  padding-top: 24px;
  background: var(--bg);
}
/* Content fades out as it scrolls under the footer */
.footer::before {
  content: "";
  position: absolute;
  inset: auto 0 100%;
  height: clamp(60px, 9vw, 160px);
  background: linear-gradient(transparent, var(--bg));
  pointer-events: none;
}
.sign { justify-self: start; }

.footer-right {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 16px;
}
.overlay-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45em;
}
.close { display: none; width: 0.65em; height: 0.65em; position: relative; }
.close::before, .close::after {
  content: "";
  position: absolute;
  inset: 50% 0 auto;
  height: 1.5px;
  background: currentColor;
}
.close::before { transform: rotate(45deg); }
.close::after { transform: rotate(-45deg); }
.overlay-link[aria-current] .close { display: inline-block; }

/* Small screens */
@media (max-width: 760px) {
  .row { grid-template-columns: 1fr; row-gap: 12px; }
  .nav { row-gap: 14px; }
  .work { padding-left: var(--pad); }
  .slider { grid-template-columns: 1fr; }
  .slider-caption { grid-column: 1; grid-row: auto; margin-top: 1.2em; }
  .info { row-gap: 56px; padding-top: 40px; }
  .about { order: -1; }
  .cv { padding-top: 0; }
  .imprint-label, .imprint { grid-row: auto; }
  .imprint-label { padding-top: 24px; }
  .imprint { padding-top: 0; }
  .footer { row-gap: 20px; }
  .footer-right { order: -1; }
}