/* Personal touches for Fluid. Keep theme upgrades independent of these styles. */
:root {
  --nest-accent: #148fda;
  --nest-tint: rgba(35, 148, 225, .08);
  --nest-border: rgba(35, 148, 225, .22);
  --glass-panel: rgba(246, 251, 255, .82);
  --glass-card: rgba(255, 255, 255, .48);
  --glass-solid: #f4faff;
  --glass-edge: rgba(255, 255, 255, .85);
  --glass-shine: rgba(255, 255, 255, .52);
  --glass-shadow: rgba(25, 89, 140, .12);
  --reading-surface: #fafbfc;
}

body {
  /* Fluid fixes body to one viewport. With an explicit html background, its
     gradient then stops at that boundary instead of covering a long article. */
  height: auto;
  min-height: 100%;
  background-image:
    radial-gradient(ellipse at 0% 20%, rgba(47, 162, 240, .19), transparent 48%),
    radial-gradient(ellipse at 100% 65%, rgba(74, 201, 224, .15), transparent 48%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
}

/* Explicit selection colors avoid inheriting the OS accent (e.g. purple). */
::selection {
  color: #fff;
  background: #096eae;
}

input, textarea, select { accent-color: #0876bd; }

/* The floating navigation is the strongest glass layer. */
.navbar, .navbar.scrolling-navbar.top-nav-collapse {
  top: 12px;
  left: 16px;
  right: 16px;
  width: auto;
  max-width: 1180px;
  margin: 0 auto;
  border: 1px solid rgba(214, 239, 255, .48);
  border-radius: 28px;
  background: linear-gradient(120deg, rgba(193, 230, 255, .18), rgba(21, 61, 94, .12)), rgba(14, 44, 70, .7);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .55), inset 0 -1px 0 rgba(137, 213, 255, .22), 0 8px 28px rgba(5, 35, 63, .18);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  backdrop-filter: blur(20px) saturate(160%);
}
.navbar-brand { font-weight: 700; letter-spacing: .06em; }
.navbar .nav-link { border-radius: 999px; margin: 0 .15rem; }
.navbar .nav-item .nav-link:hover { color: #fff; background: rgba(255, 255, 255, .13); }

.banner .mask {
  background-image: linear-gradient(180deg, rgba(8, 35, 60, .08) 35%, rgba(8, 35, 60, .36));
}
.banner-text .h2 {
  font-size: clamp(1.7rem, 3.4vw, 2.8rem);
  font-weight: 650;
  line-height: 1.55;
  text-shadow: 0 3px 20px rgba(8, 30, 52, .55);
  overflow-wrap: anywhere;
}

#board {
  border: 1px solid var(--glass-edge);
  border-radius: 1.75rem;
  background: linear-gradient(135deg, var(--glass-shine), transparent 35%), var(--glass-panel);
  box-shadow: inset 0 1px 0 var(--glass-edge), inset 0 -1px 0 var(--nest-border), 0 18px 55px var(--glass-shadow);
  -webkit-backdrop-filter: blur(18px) saturate(135%);
  backdrop-filter: blur(18px) saturate(135%);
}
/* Long-form content needs a quiet surface, without the blue glass tint. */
#board-ctn > #board {
  --board-bg-color: var(--reading-surface);
  background: var(--reading-surface);
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
}
#board-ctn .markdown-body { background-color: transparent; }
.index-card {
  padding: 1.35rem 1rem;
  margin-bottom: 1.35rem;
  border: 1px solid var(--nest-border);
  border-radius: 1.3rem;
  background: linear-gradient(125deg, var(--glass-shine), transparent 45%, var(--nest-tint)), var(--glass-card);
  box-shadow: inset 0 1px 0 var(--glass-edge), 0 4px 18px var(--glass-shadow);
  transition: border-color .2s ease, box-shadow .2s ease, transform .2s ease;
}
.index-header {
  white-space: normal;
  overflow-wrap: anywhere;
  font-size: 1.4rem;
  line-height: 1.55;
  margin-bottom: .5rem;
}
.index-info { min-width: 0; justify-content: flex-start; }
.index-excerpt, .index-excerpt__noimg {
  display: block;
  height: auto;
  max-height: none;
  margin: .65rem 0 1.15rem;
  font-size: .95rem;
}
.index-excerpt > div {
  line-height: 1.85;
  -webkit-line-clamp: 3;
}
.index-img img { border-radius: .75rem; box-shadow: none; }
.index-btm {
  margin-top: auto;
  padding-top: .85rem;
  border-top: 1px solid var(--nest-border);
  font-size: .82rem;
  line-height: 1.7;
  gap: .7rem 1.15rem;
  align-items: center;
}
.index-btm > .post-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: .4rem .5rem;
  min-width: 0;
  margin-right: 0 !important;
  overflow-wrap: anywhere;
}
.index-btm .post-meta > * { margin-right: 0; }
/* Match the tag group by its icon; date/category settings remain optional. */
.index-btm > .post-meta:has(> .icon-tags) { flex-basis: 100%; }
.index-btm .post-meta:has(> .icon-tags) > a {
  display: inline-block;
  padding: .22rem .65rem;
  border: 1px solid var(--nest-border);
  border-radius: 999px;
  background: var(--nest-tint);
  max-width: 100%;
}
.index-btm .post-meta:has(> .icon-tags) > a:hover {
  color: var(--link-hover-color);
  border-color: var(--nest-accent);
}
/* Post-page date and reading information wrap as separate, spaced items. */
.banner-text > .mt-3, .banner-text > .mt-1 {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: .5rem 1.25rem;
  line-height: 1.8;
}
.banner-text > .mt-1 { margin-top: .65rem !important; }
.banner-text .post-meta {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  margin-right: 0 !important;
  font-size: .9rem;
}
.banner-text .post-meta > * { margin-right: 0; }
.index-pin { color: var(--nest-accent) !important; }

.markdown-body { line-height: 1.9; overflow-wrap: break-word; }
.markdown-body h2 { margin-top: 2.2em; padding-bottom: .5em; border-bottom-color: var(--nest-border); }
.markdown-body h3 { margin-top: 1.8em; }
.markdown-body p { margin-bottom: 1.25em; }
.markdown-body blockquote {
  padding: .8rem 1.2rem;
  border-left: 3px solid var(--nest-accent);
  border-radius: 0 .7rem .7rem 0;
  background: var(--nest-tint);
}
.markdown-body blockquote > :last-child { margin-bottom: 0; }
.markdown-body img { border-radius: .65rem; }
.markdown-body pre, .markdown-body figure.highlight { border-radius: .75rem; }
.markdown-body a { text-underline-offset: .2em; }
.license-box { border-radius: .85rem; border: 1px solid var(--nest-border); }
.tocbot-active-link { color: var(--nest-accent); }
.tagcloud a { display: inline-block; margin: .35rem; padding: .3rem .75rem; border-radius: .7rem; background: var(--nest-tint); }
.page-link { border-radius: .65rem; }
.about-avatar img { border: 5px solid var(--board-bg-color); box-shadow: 0 8px 25px rgba(12, 64, 104, .15); }
#scroll-top-button { border-radius: .8rem; box-shadow: 0 4px 18px rgba(12, 64, 104, .1); }
footer { padding: 2.5rem 0; font-size: .85rem; }
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--nest-accent);
  outline-offset: 4px;
}

@media (hover: hover) and (prefers-reduced-motion: no-preference) {
  .index-card:hover { transform: translateY(-3px); border-color: var(--nest-accent); box-shadow: 0 9px 24px rgba(12, 64, 104, .07); }
}
@media (max-width: 767px) {
  #board { border-radius: 1rem; padding: 1.8rem 0; }
  .index-card { padding: .9rem .25rem; margin-bottom: 1rem; }
  .index-info { padding-top: .4rem; }
  .index-header { font-size: 1.15rem; display: block; }
  .banner-text { padding-right: 1rem; padding-left: 1rem; }
  .markdown-body { font-size: 1rem; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}
/* Match Fluid's stored preference and its system dark-mode fallback. */
@media (prefers-color-scheme: dark) {
  :root:not([data-user-color-scheme]) {
    --nest-accent: #79caff;
    --glass-panel: rgba(16, 35, 55, .9);
    --glass-card: rgba(37, 70, 99, .36);
    --glass-solid: #132439;
    --glass-edge: rgba(166, 218, 255, .23);
    --glass-shine: rgba(135, 202, 248, .09);
    --glass-shadow: rgba(0, 8, 20, .25);
    --reading-surface: #20242a;
  }
}
:root[data-user-color-scheme="dark"] {
  --nest-accent: #79caff;
  --glass-panel: rgba(16, 35, 55, .9);
  --glass-card: rgba(37, 70, 99, .36);
  --glass-solid: #132439;
  --glass-edge: rgba(166, 218, 255, .23);
  --glass-shine: rgba(135, 202, 248, .09);
  --glass-shadow: rgba(0, 8, 20, .25);
  --reading-surface: #20242a;
}

#scroll-top-button, .modal-content {
  color: var(--text-color);
  border: 1px solid var(--glass-edge);
  background: linear-gradient(135deg, var(--glass-shine), transparent), var(--glass-panel);
  box-shadow: inset 0 1px 0 var(--glass-edge), 0 8px 28px var(--glass-shadow);
  -webkit-backdrop-filter: blur(20px) saturate(150%);
  backdrop-filter: blur(20px) saturate(150%);
}
#scroll-top-button { border-radius: 50%; }
.modal-content { border-radius: 1.5rem; }
.page-link, .tagcloud a { border-radius: 999px; }
.page-item.active .page-link { background: #0876bd; color: #fff; }

@media (max-width: 767px) {
  .navbar, .navbar.scrolling-navbar.top-nav-collapse {
    top: 8px;
    left: 8px;
    right: 8px;
    border-radius: 22px;
  }
  body { background-attachment: scroll; }
}

/* Opaque fallbacks keep text readable without backdrop-filter. */
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  #board, .modal-content, #scroll-top-button { background: var(--glass-solid); }
  .navbar, .navbar.scrolling-navbar.top-nav-collapse { background: #183c5b; }
}
@media (prefers-reduced-transparency: reduce) {
  #board, .index-card, .modal-content, #scroll-top-button {
    background: var(--glass-solid);
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }
  .navbar, .navbar.scrolling-navbar.top-nav-collapse {
    background: #183c5b;
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }
}
@media print {
  #board-ctn > #board { --reading-surface: #fff; }
  #board { background: #fff; backdrop-filter: none; -webkit-backdrop-filter: none; }
  body, .index-card { background: none; }
  #board, .index-card { box-shadow: none; }
}