/* Additions on top of the Minimal Light theme:
   sticky top navigation, cat photo gallery, visitor map. */

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

/* Headings you jump to from the top bar should not hide under it. */
section [id] { scroll-margin-top: 72px; }

/* ---------- Top navigation bar ---------- */
.topnav {
  position: -webkit-sticky;
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  -webkit-backdrop-filter: saturate(180%) blur(8px);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid #ececec;
}
.topnav-inner {
  width: 960px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  height: 52px;
}
.topnav-name {
  display: none;
  flex: none;
  margin-right: 22px;
  font-weight: 600;
  font-size: 18px;
  color: #043361 !important;
  white-space: nowrap;
}
.topnav-links {
  list-style: none;
  margin: 0;
  padding: 0 0 0 310px; /* line up with the main text column */
  display: flex;
  gap: 26px;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}
.topnav-links::-webkit-scrollbar { display: none; }
.topnav-links li { flex: none; }
.topnav-links a {
  display: block;
  position: relative;
  padding: 13px 0;
  font-size: 17px;
  line-height: 26px;
  color: #595959;
  white-space: nowrap;
}
.topnav-links a:hover { color: #043361; }
.topnav-links a.active { color: #043361; }
.topnav-links a.active::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 8px;
  height: 2px;
  border-radius: 1px;
  background: #043361;
}

/* The theme floats the main column, which leaves .wrapper with no height.
   Clearing the float lets the sticky bar stay pinned for the whole page. */
.wrapper::after { content: ''; display: table; clear: both; }

/* Fixed sidebar sits below the bar; trim the old top padding a little. */
@media screen and (min-width: 961px) {
  body.has-topnav header,
  body.has-topnav section { padding-top: 2.6em; }
}

/* Tablet and phone: the sidebar scrolls away, so the bar spans the full width. */
@media print, screen and (max-width: 960px) {
  .topnav { margin: -15px -15px 15px; }
  .topnav-inner { width: auto; padding: 0 15px; height: 48px; }
  .topnav-links { padding-left: 0; gap: 20px; flex: 1 1 auto; min-width: 0; }
  .topnav-links a { padding: 11px 0; font-size: 16px; }
  .topnav-links a.active::after { bottom: 7px; }
  .topnav.is-overflowing .topnav-links {
    -webkit-mask-image: linear-gradient(to right, #000 85%, transparent);
    mask-image: linear-gradient(to right, #000 85%, transparent);
    padding-right: 24px;
  }
  section [id] { scroll-margin-top: 64px; }
}
@media screen and (min-width: 600px) and (max-width: 960px) {
  .topnav-name { display: block; }
}
@media screen and (max-width: 480px) {
  .topnav-links { gap: 14px; }
  .topnav-links a { font-size: 15px; }
}
@media print { .topnav { display: none; } }

/* ---------- Cats page ---------- */
/* Cover photo + caption (first paragraph of dollydayko.md) */
.cats-page section > p:first-of-type img { display: block; width: 100%; border-radius: 8px; margin-bottom: 6px; }
.cats-page section > p:first-of-type em { font-size: 15px; color: #777; }

/* Photo wall: Pinterest-style columns, photos keep their own shape */
.cat-wall {
  column-count: 2;          /* fallback without JavaScript */
  column-gap: 8px;
  margin: 8px 0 28px;
}
.cat-wall.is-js { display: flex; align-items: flex-start; gap: 8px; column-count: auto; }
.cat-col { flex: 1 1 0; min-width: 0; display: flex; flex-direction: column; gap: 8px; }
.cat-tile {
  display: block;
  break-inside: avoid;
  margin: 0 0 8px;
  overflow: hidden;
  border-radius: 6px;
  background: #eceae6;
  -webkit-tap-highlight-color: transparent;
}
.cat-wall.is-js .cat-tile { margin: 0; }
.cat-tile img {
  display: block;
  width: 100%;
  height: auto;
  transition: transform .3s ease, opacity .2s ease;
}
.cat-tile:hover img { transform: scale(1.03); }
.cat-tile:active img { opacity: .85; }
.cat-tile:focus-visible { outline: 2px solid #39c; outline-offset: 2px; }
@media screen and (min-width: 600px) { .cat-wall { column-count: 3; } }
@media screen and (max-width: 599px) {
  .cat-wall, .cat-wall.is-js, .cat-col { gap: 6px; column-gap: 6px; }
  .cat-tile { margin-bottom: 6px; }
}

/* Viewer caption */
.pswp__cat-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 28px 20px calc(16px + env(safe-area-inset-bottom));
  background: linear-gradient(to bottom, rgba(0, 0, 0, 0), rgba(0, 0, 0, 0.65));
  color: #fff;
  text-align: center;
  font-size: 16px;
  line-height: 1.4;
  pointer-events: none;
  transition: opacity .25s;
}
.pswp--ui-visible .pswp__cat-caption { opacity: 1; }
.pswp:not(.pswp--ui-visible) .pswp__cat-caption { opacity: 0; }

/* ---------- Visitor map (small, counts hidden) ---------- */
.visitor-map {
  width: 100%;
  max-width: 260px;
  margin: 40px auto 0;
  border-radius: 6px;
  overflow: hidden;
  opacity: .85;
  transition: opacity .2s;
}
.visitor-map:hover { opacity: 1; }
.visitor-map a { display: block; width: 100% !important; }
.visitor-map .mpmvs, .visitor-map #clstminf { display: none !important; }   /* no public pageview numbers */
.visitor-map-placeholder {
  padding: 36px 12px;
  border: 1px dashed #cfd6de;
  border-radius: 6px;
  font-size: 13px;
  text-align: center;
  color: #888;
}
.visitor-map-placeholder code { color: inherit; font-size: 90%; }

/* ---------- Homepage text tweaks ---------- */
section h4 { margin: 0 0 6px; }
section h4 + ul { margin-top: 0; }
.publications { margin-top: 0; }

/* ---------- Dark mode ---------- */
@media (prefers-color-scheme: dark) {
  html[data-auto-dark] .topnav {
    background: rgba(32, 33, 43, 0.92);
    border-bottom-color: #33343f;
  }
  html[data-auto-dark] .topnav-name { color: rgb(62, 183, 240) !important; }
  html[data-auto-dark] .topnav-links a { color: #b9bac0; }
  html[data-auto-dark] .topnav-links a:hover,
  html[data-auto-dark] .topnav-links a.active { color: rgb(62, 183, 240); }
  html[data-auto-dark] .topnav-links a.active::after { background: rgb(62, 183, 240); }
  html[data-auto-dark] .cats-page section > p:first-of-type em { color: #9a9ba3; }
  html[data-auto-dark] .cat-tile { background: #2a2c38; }
  html[data-auto-dark] .visitor-map-placeholder { border-color: #44465a; color: #9a9ba3; }
}