/* /blog and /blog/{slug} — light theme, reading-first */

.blog-head { padding-bottom: 0; padding-top: clamp(48px, 7vw, 96px); }
.cats { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 36px; }
.cat { display: inline-flex; align-items: center; gap: 8px; min-height: 40px; padding: 0 16px; border-radius: var(--r-pill); border: 1px solid var(--line-2);
  color: var(--ink-2); font-size: var(--t-small); font-weight: 550; transition: color var(--dur-ui) var(--ease-out), border-color var(--dur-ui) var(--ease-out), background-color var(--dur-ui) var(--ease-out); }
.cat:hover { color: var(--ink); border-color: var(--ink-3); }
.cat span { font-size: var(--t-micro); color: var(--ink-3); font-variant-numeric: tabular-nums; }
.cat.on { background: var(--ink); border-color: var(--ink); color: var(--bg); }
.cat.on span { color: color-mix(in srgb, var(--bg) 70%, transparent); }

.blog-list { padding-top: clamp(40px, 5vw, 64px); }
.posts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(20px, 2.4vw, 32px); }
.post { display: flex; flex-direction: column; border-radius: var(--r-lg); overflow: hidden; background: var(--bg-2);
  transition: transform var(--dur-ui) var(--ease-out); }
@media (hover: hover) and (pointer: fine) { .post:hover { transform: translateY(-2px); } }
.post:active { transform: scale(.99); }
.post-media { position: relative; aspect-ratio: 16 / 10; background: var(--bg-2); overflow: hidden; }
.post-media > img { width: 100%; height: 100%; object-fit: cover; }
.post-mark { display: none; position: absolute; inset: 0; place-items: center;
  background: var(--bg-2); }
.post-media.no-img .post-mark { display: grid; }
.post-mark img { width: 40px; height: 40px; opacity: .9; }
.post-body { padding: clamp(20px, 2.4vw, 28px); display: flex; flex-direction: column; flex: 1; }
.post-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 14px; margin: 0 0 12px; font-size: var(--t-micro); color: var(--ink-3); font-weight: 500; }
.post-cat { color: var(--accent); font-weight: 600; }
.post-title { font-size: clamp(1.2rem, 1.05rem + .5vw, 1.45rem); letter-spacing: -.02em; line-height: 1.22; margin: 0 0 10px; }
.post-excerpt { color: var(--ink-2); font-size: .9375rem; margin: 0; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.post .tags { margin-top: auto; padding-top: 18px; }

.post-lead { grid-column: 1 / -1; display: grid; grid-template-columns: 1.3fr 1fr; }
.post-lead .post-media { aspect-ratio: auto; min-height: 340px; }
.post-lead .post-body { justify-content: center; padding: clamp(28px, 4vw, 56px); }
.post-lead .post-title { font-size: clamp(1.75rem, 1.3rem + 1.6vw, 2.6rem); letter-spacing: -.03em; line-height: 1.1; }
.post-lead .post-excerpt { -webkit-line-clamp: 4; font-size: 1.0625rem; }

.pager { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-top: clamp(40px, 5vw, 64px); padding-top: 24px; border-top: 1px solid var(--line); }
.pg { display: inline-flex; align-items: center; min-height: 44px; padding: 0 18px; border-radius: var(--r-pill); border: 1px solid var(--line-2); font-weight: 550; font-size: var(--t-small);
  transition: border-color var(--dur-ui) var(--ease-out); }
a.pg:hover { border-color: var(--ink-3); }
.pg.disabled { color: var(--ink-3); opacity: .5; }
.pg-info { color: var(--ink-3); font-size: var(--t-small); font-variant-numeric: tabular-nums; }

.empty { text-align: center; padding: clamp(48px, 8vw, 112px) 24px; border-radius: var(--r-lg); background: var(--bg-2); }
.empty img { margin: 0 auto 20px; }
.empty h2 { margin-bottom: 8px; }
.empty .actions { margin-top: 24px; }

/* article */
.article-head { max-width: 680px; padding-top: clamp(40px, 6vw, 80px); }
.back { display: inline-flex; align-items: center; min-height: 44px; color: var(--accent); font-weight: 550; font-size: var(--t-small); margin-bottom: 18px; }
.article-title { font-size: clamp(2.2rem, 1.4rem + 3vw, 3.75rem); letter-spacing: -.035em; line-height: 1.05; margin: 4px 0 20px; }
.byline { display: flex; align-items: center; gap: 12px; margin-top: 28px; padding-top: 22px; border-top: 1px solid var(--line); }
.byline b { display: block; font-size: var(--t-small); }
.byline small { display: block; font-size: var(--t-micro); color: var(--ink-3); }
.avatar { width: 40px; height: 40px; border-radius: 50%; flex-shrink: 0; display: grid; place-items: center; font-weight: 650; color: #fff;
  background: var(--co-blue); }
.article-hero { max-width: 1040px; margin: clamp(32px, 4vw, 56px) auto 0; }
.article-hero img { width: 100%; border-radius: var(--r-lg); max-height: 620px; object-fit: cover; }

.prose { max-width: 680px; margin: clamp(36px, 5vw, 64px) auto 0; font-size: 1.125rem; line-height: 1.72; color: #2C2C2E; letter-spacing: -.012em; }
.prose > * + * { margin-top: 1.1em; }
.prose p { margin: 0; }
.prose h2 { font-size: 1.75rem; letter-spacing: -.025em; line-height: 1.2; margin-top: 2em; color: var(--ink); }
.prose h3 { font-size: 1.35rem; letter-spacing: -.02em; line-height: 1.25; margin-top: 1.8em; color: var(--ink); }
.prose a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; }
.prose img { border-radius: var(--r-md); margin-inline: auto; }
.prose ul, .prose ol { padding-left: 1.3em; }
.prose li + li { margin-top: .4em; }
.prose blockquote { margin: 1.6em 0; padding: 4px 0 4px 22px; border-left: 3px solid var(--signal); color: var(--ink-2); font-size: 1.2rem; }
.prose code { font-family: var(--mono); font-size: .88em; background: var(--bg-2); padding: 2px 6px; border-radius: 6px; }
.prose pre { background: #1D1D1F; color: #F5F5F7; padding: 18px; border-radius: var(--r-sm); overflow-x: auto; font-size: .9rem; line-height: 1.55; }
.prose pre code { background: none; padding: 0; }
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 2.4em 0; }
.prose table { width: 100%; border-collapse: collapse; font-size: .95rem; }
.prose th, .prose td { padding: 10px 12px; border-bottom: 1px solid var(--line); text-align: left; }
.prose-tags { max-width: 680px; margin: 32px auto 0; }

.share { max-width: 680px; margin: 36px auto clamp(64px, 8vw, 112px); display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 14px;
  padding: 18px 20px; border-radius: var(--r-md); background: var(--bg-2); }
.share > span { font-weight: 600; font-size: var(--t-small); }
.share-btns { display: flex; flex-wrap: wrap; gap: 8px; }
.share .btn-ghost { background: var(--bg); }

.narrow { max-width: 760px; }
.comment { display: flex; gap: 14px; padding: 20px 0; border-bottom: 1px solid var(--line); }
.comment:first-of-type { margin-top: 16px; border-top: 1px solid var(--line); }
.comment-meta { display: flex; gap: 10px; align-items: baseline; margin: 0 0 4px; font-size: var(--t-small); }
.comment-meta time { color: var(--ink-3); font-size: var(--t-micro); }
.comment-body { margin: 0; color: var(--ink-2); white-space: pre-line; }
.comment-form { margin-top: 36px; display: grid; gap: 18px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { display: grid; gap: 6px; font-size: var(--t-small); font-weight: 550; }
.field em { font-style: normal; font-weight: 400; color: var(--ink-3); }
.field input, .field textarea { width: 100%; font: inherit; font-size: 1rem; font-weight: 400; color: var(--ink); background: var(--bg); border: 1px solid var(--line-2);
  border-radius: 12px; padding: 12px 14px; min-height: 46px; transition: border-color var(--dur-ui) var(--ease-out), box-shadow var(--dur-ui) var(--ease-out); }
.field textarea { resize: vertical; min-height: 120px; }
.field input:focus, .field textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent); }
.field [aria-invalid="true"] { border-color: #D70015; }
.err { color: #D70015; font-weight: 500; font-size: var(--t-micro); }
.flash { margin: 0; padding: 12px 14px; border-radius: 12px; background: #E8F7EE; color: #0B6B2E; font-size: var(--t-small); font-weight: 550; }

@media (max-width: 980px) {
  .posts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .post-lead { grid-template-columns: 1fr; }
  .post-lead .post-media { min-height: 0; aspect-ratio: 16 / 9; }
}
@media (max-width: 640px) {
  .posts { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .share { flex-direction: column; align-items: flex-start; }
}
@media (prefers-reduced-motion: reduce) { .post:hover { transform: none; } }