/* AI Digest — light + dark стили (PRD §12.3). */
:root {
  --bg: #fff;
  --bg-alt: #f5f5f4;
  --bg-card: #fff;
  --fg: #0c0a09;
  --fg-muted: #57534e;
  --border: #e7e5e4;
  --link: #1d4ed8;
  --link-visited: #6d28d9;
  --accent-must: #dc2626;
  --accent-worth: #2563eb;
  --accent-ref: #57534e;
  --confidence-verified: #16a34a;
  --confidence-official: #2563eb;
  --confidence-media: #ca8a04;
  --retracted: #b91c1c;
  --cat-models-llm: #2563eb;
  --cat-video: #7c3aed;
  --cat-audio: #db2777;
  --cat-image: #ea580c;
  --cat-tools: #0891b2;
  --cat-research: #65a30d;
  --cat-industry: #57534e;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0c0a09;
    --bg-alt: #1c1917;
    --bg-card: #1c1917;
    --fg: #f5f5f4;
    --fg-muted: #a8a29e;
    --border: #292524;
    --link: #93c5fd;
    --link-visited: #c4b5fd;
    --accent-must: #f87171;
    --accent-worth: #60a5fa;
    --accent-ref: #a8a29e;
    --confidence-verified: #4ade80;
    --confidence-official: #60a5fa;
    --confidence-media: #facc15;
    --retracted: #f87171;
  }
}

* { box-sizing: border-box; }
html { color-scheme: light dark; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 17px;
  line-height: 1.55;
  color: var(--fg);
  background: var(--bg);
}
main { max-width: 720px; margin: 0 auto; padding: 1.5rem 1rem 4rem; }
h1, h2, h3 { line-height: 1.25; }
a { color: var(--link); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:visited { color: var(--link-visited); }
a:focus-visible { outline: 2px solid var(--link); outline-offset: 2px; border-radius: 2px; }

.site-header { display: flex; flex-wrap: wrap; gap: 1rem; align-items: baseline; max-width: 720px; margin: 0 auto; padding: 1rem; border-bottom: 1px solid var(--border); }
.site-header .logo { font-weight: 700; font-size: 1.15rem; text-decoration: none; }
.site-nav { display: flex; gap: 1rem; flex-wrap: wrap; }
.site-nav a { color: var(--fg-muted); }

.site-footer { max-width: 720px; margin: 2rem auto 0; padding: 1.5rem 1rem; border-top: 1px solid var(--border); color: var(--fg-muted); font-size: 0.9rem; }
.site-footer p { margin: 0.25rem 0; }

.hero h1 { font-size: 2rem; margin-bottom: 0.25rem; }
.hero .lede { color: var(--fg-muted); margin-top: 0; }

.tags { list-style: none; padding: 0; margin: 0.5rem 0; display: flex; flex-wrap: wrap; gap: 0.4rem; }
.tags--hot { overflow-x: auto; flex-wrap: nowrap; padding-bottom: 0.5rem; }
.tag-chip { display: inline-block; padding: 0.15rem 0.55rem; background: var(--bg-alt); border-radius: 999px; font-size: 0.85rem; color: var(--fg-muted); text-decoration: none; border: 1px solid var(--border); }
.tag-chip:hover { color: var(--link); border-color: var(--link); }
.tag-chip__count { color: var(--fg-muted); font-variant-numeric: tabular-nums; margin-left: 0.25rem; opacity: 0.7; }

.card { border: 1px solid var(--border); border-left: 4px solid var(--accent-ref); border-radius: 6px; background: var(--bg-card); padding: 1rem 1.1rem; margin: 1rem 0; }
.card--models-llm { border-left-color: var(--cat-models-llm); }
.card--video { border-left-color: var(--cat-video); }
.card--audio { border-left-color: var(--cat-audio); }
.card--image { border-left-color: var(--cat-image); }
.card--tools { border-left-color: var(--cat-tools); }
.card--research { border-left-color: var(--cat-research); }
.card--industry { border-left-color: var(--cat-industry); }
.card--retracted { background: rgba(185, 28, 28, 0.07); }
.card__header { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: baseline; }
.card-title { margin: 0; font-size: 1.1rem; }
.card-title a { text-decoration: none; }
.card-title a:hover { text-decoration: underline; }
.lab { color: var(--fg-muted); font-size: 0.9rem; }
.card-meta { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 0.5rem 0; font-size: 0.85rem; }
.meta-chip { padding: 0.05rem 0.4rem; border-radius: 4px; background: var(--bg-alt); color: var(--fg-muted); }
.summary { margin: 0.5rem 0; }
.why-matters { margin: 0.5rem 0; }
.why-matters summary { cursor: pointer; color: var(--fg-muted); font-size: 0.9rem; }
.sources { margin-top: 0.5rem; font-size: 0.85rem; color: var(--fg-muted); }
.retracted-prefix, .retracted-prefix * { color: var(--retracted); font-weight: 700; }

.confidence { display: inline-block; padding: 0.05rem 0.45rem; border-radius: 4px; font-size: 0.8rem; font-weight: 600; }
.confidence--verified { background: color-mix(in srgb, var(--confidence-verified) 18%, transparent); color: var(--confidence-verified); }
.confidence--official { background: color-mix(in srgb, var(--confidence-official) 18%, transparent); color: var(--confidence-official); }
.confidence--media { background: color-mix(in srgb, var(--confidence-media) 22%, transparent); color: var(--confidence-media); }

.bucket { margin: 1.5rem 0; }
.bucket__title { display: flex; align-items: baseline; gap: 0.4rem; border-bottom: 2px solid var(--border); padding-bottom: 0.25rem; }
.bucket--must-read .bucket__title { border-bottom-color: var(--accent-must); }
.bucket--worth-knowing .bucket__title { border-bottom-color: var(--accent-worth); }
.bucket--reference .bucket__title { border-bottom-color: var(--accent-ref); }
.bucket__count { color: var(--fg-muted); font-weight: 400; font-size: 0.95rem; }
.bucket__category-title { font-size: 0.95rem; text-transform: lowercase; color: var(--fg-muted); margin: 1rem 0 0.25rem; }

.retraction-ribbon { background: color-mix(in srgb, var(--retracted) 15%, transparent); color: var(--retracted); padding: 0.6rem 0.8rem; border-radius: 4px; margin-bottom: 1rem; }
.item--retracted .item__title { text-decoration: line-through; }

.feed-entry { margin: 2rem 0; padding-bottom: 1rem; border-bottom: 1px solid var(--border); }
.feed-entry__header { display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.6rem; }
.feed-entry__count { color: var(--fg-muted); font-size: 0.9rem; }

.archive__list { list-style: none; padding: 0; }
.archive__entry { padding: 0.3rem 0; border-bottom: 1px dotted var(--border); display: flex; gap: 1rem; }
.archive__count { color: var(--fg-muted); font-size: 0.85rem; }

.tag-page__list { list-style: none; padding: 0; }
.tag-page__entry { padding: 0.4rem 0; border-bottom: 1px dotted var(--border); display: flex; gap: 0.75rem; flex-wrap: wrap; }
.tag-page__date { color: var(--fg-muted); font-variant-numeric: tabular-nums; min-width: 6.5em; }
.tag-page__lab, .tag-page__cat { color: var(--fg-muted); font-size: 0.85rem; }

.sources-list ul { list-style: none; padding: 0; }
.sources-list li { padding: 0.2rem 0; border-bottom: 1px dotted var(--border); }
.source-type { color: var(--fg-muted); font-size: 0.85rem; }
.source-syndicated { color: var(--fg-muted); font-size: 0.8rem; margin-left: 0.4rem; }

.search-fallback { margin-top: 2rem; }

@media print {
  .site-header, .site-footer, .site-nav, .search-fallback, .digest-nav { display: none; }
  body { font-size: 11pt; color: #000; background: #fff; }
  main { max-width: none; padding: 0; }
  .why-matters[open], .bucket details, details { display: block; }
  details > summary { list-style: none; }
  details[open] > summary::after { content: ""; }
  details:not([open]) { display: none; }
  a[href^="http"]::after { content: " (" attr(href) ")"; font-size: 0.85em; color: #555; }
  .card { break-inside: avoid; border: 1px solid #999; }
}