:root { --ink: #111; --gray: #555; --line: #ddd; }
* { box-sizing: border-box; }
body {
  margin: 0;
  background: #fff;
  color: var(--ink);
  font: 400 1.1rem/1.7 Georgia, "Times New Roman", serif;
}
h1, h2, h3 { font-weight: 700; line-height: 1.2; margin: 0 0 .5em; }
h1 { font-size: clamp(2rem, 6vw, 3.25rem); }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.2rem; }
a { color: inherit; }
a:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }
.wrap { max-width: 46rem; margin: 0 auto; padding: 0 1.25rem; }
.wrap.wide { max-width: 72rem; }

header.site { border-bottom: 1px solid var(--line); }
header.site .wrap {
  display: flex; flex-wrap: wrap; gap: .5rem 2rem;
  align-items: center; justify-content: space-between; padding-block: 1rem;
}
.brand { font-weight: 700; font-size: 1.2rem; text-decoration: none; display: flex; align-items: center; }
.brand-img { max-height: 2.5rem; width: auto; background: transparent; }
nav { display: flex; flex-wrap: wrap; gap: 0 .25rem; }
nav a { display: inline-block; padding: .8rem .75rem; min-height: 44px; }
nav a[aria-current="page"] { text-decoration: none; font-weight: 700; }

main { padding: 3rem 0 4rem; }
.lede { color: var(--gray); }
.btn { display: inline-block; margin-top: 1rem; padding: .8rem 1.4rem; min-height: 44px; border: 1px solid var(--ink); text-decoration: none; }
.btn:hover { background: var(--ink); color: #fff; }

img, .ph { width: 100%; height: auto; display: block; background: #eee; }
.hero img { margin-top: 2rem; }
.strip { margin-top: 3rem; }
.strip div { margin-bottom: 1.5rem; }
.strip p { margin: 0; color: var(--gray); }

.project { margin-top: 3rem; padding-top: 2rem; border-top: 1px solid var(--line); }
.meta { color: var(--gray); margin: 0 0 1rem; }
.pair { display: grid; gap: 1rem; }
@media (min-width: 40rem) { .pair { grid-template-columns: 1fr 1fr; } }
figure { margin: 0; }
figcaption { font-size: .9rem; color: var(--gray); margin-top: .3rem; }

.contact dl { display: grid; grid-template-columns: max-content 1fr; gap: .5rem 2rem; margin: 2rem 0; }
.contact dt { font-weight: 700; }
.contact dd { margin: 0; }

footer.site { border-top: 1px solid var(--line); padding: 1.5rem 0; color: var(--gray); font-size: .9rem; }

.projects-layout {
  display: grid;
  gap: 2rem;
  padding: 2rem 1.25rem 4rem;
}
.projects-layout.wrap { padding-top: 2rem; padding-bottom: 4rem; }
.projects-sidebar nav { display: block; }
.projects-sidebar .nav-group { margin: 0; border-bottom: 1px solid var(--line); }
.projects-sidebar .nav-group > summary {
  cursor: pointer;
  font-size: .85rem;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--gray);
  padding: .7rem 0;
  line-height: 1.3;
}
.projects-sidebar .nav-group > summary:hover { color: var(--ink); }
.projects-sidebar ul { list-style: none; margin: 0; padding: 0 0 .75rem 1.1rem; }
.projects-sidebar li { margin: 0; }
.projects-sidebar a {
  display: block;
  padding: .35rem 0;
  text-decoration: none;
  color: var(--ink);
  line-height: 1.35;
  font-size: 1rem;
}
.projects-sidebar a:hover { text-decoration: underline; }
.projects-sidebar a[aria-current="page"] { font-weight: 700; }

.projects-nav-toggle { border: 0; }
.projects-nav-toggle > summary {
  cursor: pointer;
  font-weight: 700;
  font-size: 1.2rem;
  padding: .4rem 0;
  list-style: none;
}
.projects-nav-toggle > summary::-webkit-details-marker { display: none; }

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(10.5rem, 1fr));
  gap: .6rem;
  margin-top: 1.25rem;
}
.gallery-item {
  margin: 0;
  padding: 0;
  border: 0;
  background: #eee;
  cursor: pointer;
  display: block;
  aspect-ratio: 4 / 3;
  overflow: hidden;
}
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.gallery-item:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }

.lightbox {
  border: 0;
  padding: 0;
  max-width: min(96vw, 72rem);
  max-height: 92vh;
  background: transparent;
}
.lightbox::backdrop { background: rgba(0, 0, 0, .85); }
.lightbox img {
  max-width: 96vw;
  max-height: 88vh;
  width: auto;
  height: auto;
  margin: 0 auto;
  background: #111;
}
.lightbox-close,
.lightbox-prev,
.lightbox-next {
  position: fixed;
  border: 0;
  background: transparent;
  color: #fff;
  font-size: 2.25rem;
  line-height: 1;
  cursor: pointer;
  min-width: 44px;
  min-height: 44px;
}
.lightbox-close { top: 1rem; right: 1rem; }
.lightbox-prev { left: .5rem; top: 50%; transform: translateY(-50%); }
.lightbox-next { right: .5rem; top: 50%; transform: translateY(-50%); }

@media (min-width: 52rem) {
  .projects-layout {
    grid-template-columns: 16rem minmax(0, 1fr);
    align-items: start;
    gap: 3rem;
  }
  .projects-sidebar { position: sticky; top: 1rem; }
  .projects-nav-toggle > summary { pointer-events: none; }
  .projects-nav-toggle { overflow: auto; max-height: calc(100vh - 2rem); }
}