:root {
  --gutter: 28px;
  --gutter-dense: 12px;
  --ink: #1a1a1a;
  --ink-soft: #6b6b6b;
  --bg: #fafaf8;
  --border: #e3e2dd;
  --focus: #2f6fed;
  --accent: #34a5cb;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, "Segoe UI", sans-serif;
}

.page {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 40px 80px;
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding-bottom: 40px;
}

.site-title {
  font-size: 20px;
  font-weight:700;
  color: var(--ink);
  text-decoration: none;
}

.site-nav { display: flex; gap: 20px; }
.site-nav a {
  padding: 0 .15rem .5rem;
  font-size: 13px;
  color: var(--ink-soft);
  text-decoration: none;
}
.site-nav a:hover { color: var(--ink); }
.site-nav a[aria-current="page"] { 
  color: var(--ink); 
  border-bottom: 2px solid var(--accent);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 28px;
  height: 28px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}
.nav-toggle span {
  display: block;
  height: 1px;
  background: var(--ink);
}

@media (max-width: 900px) {
  .nav-toggle { display: flex; }

  .site-nav {
    display: none;
    position: absolute;
    top: 3.2rem;
    right: 0;
    flex-direction: column;
    gap: 14px;
    background: var(--bg);
    border: 0.5px solid var(--border);
    padding: 16px 0px;
    z-index: 10;
  }
  .site-nav a {
    padding-left: 1rem;
    padding-right: 1rem;
    border-left: 4px solid transparent;
  }
  .site-nav a[aria-current="page"] {
    border-bottom: none;
    border-left: 4px solid var(--accent);
  }
  .site-nav.is-open { display: flex; }
}

.site-header { position: relative; }

/* --- about page --- */
.about {
  /* display: grid;
  grid-template-columns: 320px 1fr;
  gap: 48px;
  align-items: start; */
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
}
@media (max-width: 700px) {
  .about { grid-template-columns: 1fr; }
}
.about-photo {
  width: 100%;
  height: auto;
  max-width: 600px
  /* display: block;
  filter: grayscale(1); */
}
.about-text p {
  font-size: 15px;
  line-height: 1.6;
  font-family: Georgia, 'Times New Roman', Times, serif;
  color: var(--ink);
}
.about-links { display: flex; gap: 20px; margin-top: 24px; justify-content: center; }
.about-links a { font-size: 13px; color: var(--ink-soft); text-decoration: none; }
.about-links a:hover { color: var(--ink); }

/* --- grid: CSS-columns masonry today, native grid-lanes when it's ready --- */
.grid {
  column-count: 4;
  column-gap: var(--gutter);
}
@media (max-width: 900px) { .grid { column-count: 3; } }
@media (max-width: 600px) { .grid { column-count: 2; } }

.grid--dense {
  column-count: 6;
  column-gap: var(--gutter-dense);
}
@media (max-width: 900px) { .grid--dense { column-count: 4; } }
@media (max-width: 600px) { .grid--dense { column-count: 3; } }

@supports (display: grid-lanes) {
  .grid, .grid--dense {
    display: grid-lanes;
    grid-template-columns: repeat(4, 1fr);
    column-count: initial;
  }
  .grid--dense { grid-template-columns: repeat(6, 1fr); }
  @media (max-width: 900px) {
    .grid { grid-template-columns: repeat(3, 1fr); }
    .grid--dense { grid-template-columns: repeat(4, 1fr); }
  }
  @media (max-width: 600px) {
    .grid { grid-template-columns: repeat(2, 1fr); }
    .grid--dense { grid-template-columns: repeat(3, 1fr); }
  }
}

.thumb {
  display: block;
  position: relative;
  break-inside: avoid;
  margin-bottom: var(--gutter);
  border-radius: 1px;
  overflow: hidden;
}
.grid--dense .thumb { margin-bottom: var(--gutter-dense); }

.thumb picture, .thumb img {
  display: block;
  width: 100%;
  height: auto;
}

.thumb img {
  filter: grayscale(1) contrast(0.97);
  transition: filter 0.3s ease;
}
.thumb:hover img, .thumb:focus-visible img {
  filter: grayscale(0);
}

.thumb:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.thumb-badge {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 22px;
  height: 22px;
  background: rgba(0, 0, 0, 0.55);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.thumb-badge-count {
  color: #fff;
  font-size: 11px;
}

/* --- archive filter chips --- */
.filters {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  padding-bottom: 24px;
  border-bottom: 0.5px solid var(--border);
  margin-bottom: 24px;
}
.chip {
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 12px;
  border: 0.5px solid var(--border);
  background: none;
  color: var(--ink-soft);
  cursor: pointer;
}
.chip.is-active {
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
}
.thumb[hidden] { display: none; }

/* --- overlay --- */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.88);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}
.overlay[hidden] { display: none; }

.overlay img {
  max-width: 84vw;
  max-height: 78vh;
  display: block;
}

.overlay-nav {
  position: absolute;
  top: 0; bottom: 0;
  width: 15%;
  display: flex;
  align-items: center;
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.6);
  font-size: 28px;
  cursor: pointer;
}
.overlay-nav:hover { color: rgba(255, 255, 255, 0.95); }
.overlay-nav--prev { left: 0; justify-content: flex-start; padding-left: 24px; }
.overlay-nav--next { right: 0; justify-content: flex-end; padding-right: 24px; }

.overlay-close {
  position: absolute;
  top: 20px;
  right: 24px;
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.7);
  font-size: 13px;
  cursor: pointer;
}

.overlay-caption {
  position: absolute;
  bottom: 20px;
  left: 24px;
  color: rgba(255, 255, 255, 0.55);
  font-size: 12px;
}

@media (prefers-reduced-motion: no-preference) {
  .thumb img { transition: filter 0.3s ease; }
}