/* Han Wen Zhang — portfolio */

:root {
  --ink: #000;
  --ink-soft: #2b2b2b;
  --ink-faint: #8c8c8c;
  --rule: rgba(0, 0, 0, 0.85);
  --page: #fff;
  --maxw: 980px;
  --gap: 10px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--page);
  color: var(--ink-soft);
  font-family: "Nunito Sans", "Avenir Next", Avenir, "Segoe UI", Helvetica, Arial, sans-serif;
  font-weight: 300;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- header ---------- */

.site-header { padding-top: 38px; }

.wordmark {
  margin: 0;
  text-align: center;
  font-family: Jost, "Brandon Grotesque", "Century Gothic", "Futura", "Segoe UI", sans-serif;
  font-weight: 300;
  font-size: 40px;
  line-height: 1.2;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.wordmark a {
  color: var(--ink);
  text-decoration: none;
}

.site-header hr {
  margin: 26px 0 0;
  border: 0;
  border-top: 1px solid var(--rule);
}

.site-nav {
  margin-top: 20px;
  text-align: center;
}

.site-nav a {
  display: inline-block;
  margin: 0 14px;
  padding: 4px 0;
  color: var(--ink-soft);
  font-size: 14px;
  letter-spacing: 0.02em;
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.site-nav a:hover,
.site-nav a:focus-visible { border-bottom-color: var(--ink-soft); }

.site-nav a[aria-current="page"] { border-bottom-color: var(--ink-soft); }

/* ---------- gallery ---------- */

.gallery {
  margin: 82px 0 0;
  columns: 3;
  column-gap: var(--gap);
}

.gallery figure {
  margin: 0 0 var(--gap);
  break-inside: avoid;
  page-break-inside: avoid;
}

.gallery img {
  display: block;
  width: 100%;
  height: auto;
  cursor: zoom-in;
  background: #f2f2f2;
}

/* ---------- footer ---------- */

.site-footer {
  margin: 70px 0 46px;
  text-align: center;
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--ink-faint);
}

/* ---------- lightbox ---------- */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.98);
}

.lightbox.is-open { display: flex; }

.lightbox img {
  max-width: 88vw;
  max-height: 88vh;
  width: auto;
  height: auto;
  cursor: zoom-out;
}

.lightbox button {
  position: absolute;
  border: 0;
  background: none;
  color: var(--ink-soft);
  font-family: inherit;
  font-weight: 300;
  line-height: 1;
  cursor: pointer;
  padding: 12px;
}

.lightbox button:hover { color: var(--ink); }

.lb-close { top: 14px; right: 18px; font-size: 30px; }
.lb-prev { left: 6px; top: 50%; transform: translateY(-50%); font-size: 40px; }
.lb-next { right: 6px; top: 50%; transform: translateY(-50%); font-size: 40px; }

body.lb-open { overflow: hidden; }

/* ---------- responsive ---------- */

@media (max-width: 940px) {
  .gallery { columns: 2; margin-top: 60px; }
}

@media (max-width: 620px) {
  .site-header { padding-top: 32px; }
  .wordmark { font-size: 26px; }
  .site-header hr { margin-top: 18px; }
  .site-nav { margin-top: 14px; }
  .site-nav a { margin: 0 10px; font-size: 13px; }
  .gallery { columns: 1; margin-top: 40px; }
  .lb-prev, .lb-next { font-size: 30px; }
}

@media (prefers-reduced-motion: no-preference) {
  .gallery img { transition: opacity 0.2s ease; }
  .gallery img:hover { opacity: 0.88; }
}

/* JS masonry: equal-width columns filled left-to-right (see assets/js/masonry.js).
   Replaces the CSS `columns` fallback once the script has run. */

.gallery.is-masonry {
  columns: auto;
  display: flex;
  align-items: flex-start;
  gap: var(--gap);
}

.gallery.is-masonry .gal-col {
  flex: 1 1 0;
  min-width: 0;
}