/*
 * blog.css — the "Field notes" blog index + article pages.
 *
 * Self-contained: these two pages deliberately do NOT use main.css / the book
 * skins. Visual language per the design handoff ("Облако тегов для блога"):
 * uppercase IBM Plex Mono UI accents, warm paper, rust-orange accent, Helvetica
 * body. Tokens are inlined below as literals (single source: this file).
 *
 *   Paper #f5f3ee · Ink #17150f · Ink-2 #2a2822 · Ink-3 #3f3c34
 *   Muted #6b675c · Muted-2 #a29c8c · Accent #b5471d · Accent-hover #9a3c18
 *   Line #dcd8cd · Line-2 #e6e2d8 · Line-3 #cfcabd · Chip #eceadf · Hover #efece4
 */

/* ── Reset / global chrome ──────────────────────────────────────────────── */
* { box-sizing: border-box; }
html { height: auto; }
html, body { margin: 0; padding: 0; }
body.blog {
    background: #f5f3ee;
    color: #17150f;
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
}
body.blog ::selection { background: #17150f; color: #f5f3ee; }
body.blog a { color: #b5471d; text-decoration: none; }
body.blog a:hover { color: #17150f; }

.blog-frame { max-width: 1080px; margin: 0 auto; padding: 0 40px; }

/* Top nav (both pages) */
.blog-nav {
    display: flex; align-items: center; justify-content: space-between;
    padding: 28px 0 22px; border-bottom: 1px solid #17150f;
}
.blog-nav .wordmark {
    font-family: 'IBM Plex Mono', monospace; font-size: 13px; font-weight: 600;
    letter-spacing: 0.14em; color: #17150f;
}
.blog-nav .links {
    display: flex; gap: 26px;
    font-family: 'IBM Plex Mono', monospace; font-size: 12px; letter-spacing: 0.14em;
}
.blog-nav .links a { color: #6b675c; }
.blog-nav .links a.active { color: #17150f; }

/* Footer (both pages) */
.blog-footer {
    padding: 40px 0 60px; border-top: 1px solid #17150f;
    display: flex; justify-content: space-between;
    font-family: 'IBM Plex Mono', monospace; font-size: 12px; letter-spacing: 0.08em;
    color: #6b675c;
}
.blog-footer a { color: #6b675c; }

/* ══ Screen 1 — index ═══════════════════════════════════════════════════ */
.blog-header { padding: 64px 0 40px; }
.blog-eyebrow {
    font-family: 'IBM Plex Mono', monospace; font-size: 12px; letter-spacing: 0.22em;
    color: #b5471d; margin-bottom: 20px;
}
.blog-h1 { margin: 0; font-size: 82px; line-height: 0.94; font-weight: 700; letter-spacing: -0.03em; }
.blog-sub { margin: 22px 0 0; max-width: 560px; font-size: 18px; line-height: 1.5; color: #3f3c34; }

/* Filter bar — two quiet rows (TOPIC / KEYWORD), constant height. NOT a tag
   cloud: never render the full vocabulary. The topic row is the fixed set of
   sections; the keyword row shows the top 14 tags of the current result set. */
.blog-filter { border-top: 1px solid #17150f; border-bottom: 1px solid #dcd8cd; }
.blog-filter-row { display: flex; align-items: center; flex-wrap: wrap; gap: 10px 6px; padding: 14px 0; }
.blog-filter-row-kw { padding: 0 0 14px; }
.blog-rail {
    font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.16em;
    color: #a29c8c; margin-right: 6px;
}
.blog-chip-set { display: contents; }  /* chips flow inline in the row's flex */
.blog-result {
    margin-left: auto;  /* pushed to the far right of the topic row */
    font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.12em; color: #a29c8c;
}
/* One shared chip style for both rows — uniform size, no counts, no boxes. */
.blog-chip-btn {
    font-family: 'IBM Plex Mono', monospace; font-size: 12px; line-height: 1; letter-spacing: 0.06em;
    padding: 7px 10px; border: 1px solid transparent; border-radius: 2px;
    background: transparent; color: #3f3c34; cursor: pointer;
    transition: background .12s, color .12s;
}
.blog-chip-btn.is-dim { color: #8b8677; }               /* keyword row, idle */
.blog-chip-btn:hover { background: #e6e2d8; color: #17150f; }
.blog-chip-btn.is-active { background: #17150f; color: #f5f3ee; }
.blog-chip-btn.is-active:hover { background: #2c281d; color: #f5f3ee; }

/* Article list */
.blog-list { padding: 16px 0 40px; }
.blog-row {
    display: grid; grid-template-columns: 130px 1fr; gap: 28px; padding: 24px 0;
    border-bottom: 1px solid #e6e2d8; color: #17150f;
}
.blog-row:hover { background: #efece4; color: #17150f; }
.blog-row-meta {
    font-family: 'IBM Plex Mono', monospace; font-size: 12px; color: #6b675c;
    letter-spacing: 0.04em; padding-top: 4px;
}
.blog-row-read { margin-top: 6px; color: #a29c8c; }
.blog-row-topic {
    font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.12em;
    color: #b5471d; margin-bottom: 8px; text-transform: uppercase;
}
.blog-row-title {
    margin: 0 0 10px; font-size: 21px; line-height: 1.28; font-weight: 600;
    letter-spacing: -0.01em; text-wrap: pretty;
}
.blog-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.blog-chip {
    font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.04em;
    padding: 3px 7px; border-radius: 2px; background: #eceadf; color: #6b675c;
}
.blog-chip.is-active { background: #b5471d; color: #f5f3ee; }

/* Pagination — one quiet line: range label left, "← 01 / 73 →" right.
   Never a numbered button per page. */
.blog-pager {
    display: flex; align-items: center; justify-content: space-between; gap: 24px;
    flex-wrap: wrap; padding: 28px 0 4px;
}
.blog-range {
    font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.12em; color: #a29c8c;
}
.blog-pager-nav { display: flex; align-items: center; gap: 20px; }
.blog-arrow {
    font-family: 'IBM Plex Mono', monospace; font-size: 16px; line-height: 1;
    width: 34px; height: 34px; display: flex; align-items: center; justify-content: center;
    border: none; border-radius: 2px; background: transparent; color: #17150f;
    cursor: pointer; transition: background .12s;
}
.blog-arrow:hover:not(:disabled) { background: #e6e2d8; }
.blog-arrow:disabled { color: #cfcabd; cursor: default; }
.blog-counter {
    font-family: 'IBM Plex Mono', monospace; font-size: 12px; letter-spacing: 0.14em; color: #17150f;
}

.blog-empty {
    font-family: 'IBM Plex Mono', monospace; font-size: 13px; letter-spacing: 0.06em;
    color: #a29c8c; padding: 24px 0;
}

/* ══ Screen 2 — article ═════════════════════════════════════════════════ */
.blog-progress {
    position: fixed; top: 0; left: 0; height: 3px; width: 0%;
    background: #b5471d; z-index: 50;
}
.blog-article { max-width: 760px; margin: 0 auto; padding: 0 40px; }

.blog-post-head { padding: 64px 0 36px; border-bottom: 1px solid #dcd8cd; }
.blog-back {
    font-family: 'IBM Plex Mono', monospace; font-size: 12px; letter-spacing: 0.12em; color: #6b675c;
}
.blog-post-topic {
    font-family: 'IBM Plex Mono', monospace; font-size: 12px; letter-spacing: 0.14em;
    color: #b5471d; margin: 28px 0 18px; text-transform: uppercase;
}
.blog-post-title {
    margin: 0; font-size: 52px; line-height: 1.04; font-weight: 700;
    letter-spacing: -0.025em; text-wrap: balance;
}
.blog-post-dek { margin: 24px 0 30px; font-size: 21px; line-height: 1.5; color: #3f3c34; text-wrap: pretty; }
.blog-post-meta {
    display: flex; flex-wrap: wrap; align-items: center; gap: 18px;
    font-family: 'IBM Plex Mono', monospace; font-size: 12px; letter-spacing: 0.06em; color: #6b675c;
}
.blog-post-meta .sep { color: #cfcabd; }

/* Body typography */
.blog-body { padding: 44px 0 20px; font-size: 18px; line-height: 1.72; color: #2a2822; }
.blog-body p { margin: 0 0 24px; }
.blog-body h2 { margin: 48px 0 16px; font-size: 30px; line-height: 1.15; font-weight: 700; letter-spacing: -0.02em; }
.blog-body h3 { margin: 36px 0 14px; font-size: 23px; line-height: 1.2; font-weight: 700; letter-spacing: -0.015em; }
.blog-body strong { font-weight: 700; }
.blog-body a { color: #b5471d; }
.blog-body a:hover { color: #17150f; }
.blog-body ul, .blog-body ol { margin: 0 0 24px; padding-left: 24px; }
.blog-body li { margin: 0 0 8px; }
.blog-body img { max-width: 100%; height: auto; display: block; margin: 36px 0; border: 1px solid #dcd8cd; }
.blog-body :not(pre) > code {
    font-family: 'IBM Plex Mono', monospace; font-size: 0.9em;
    background: #e9e5da; padding: 2px 6px; border-radius: 3px;
}
.blog-body blockquote {
    margin: 32px 0; padding: 6px 0 6px 24px; border-left: 3px solid #b5471d;
    font-size: 22px; line-height: 1.45; font-style: normal; color: #17150f;
}
.blog-body pre {
    margin: 28px 0; padding: 18px 16px; background: #1c1a13; color: #e7e3d6;
    font-family: 'IBM Plex Mono', monospace; font-size: 14px; line-height: 1.65;
    overflow-x: auto; border: 1px solid #17150f; border-radius: 3px;
}
.blog-body pre code { font: inherit; background: none; padding: 0; }
.blog-body figure { margin: 36px 0; }
.blog-body figcaption {
    margin-top: 12px; font-family: 'IBM Plex Mono', monospace; font-size: 12px;
    color: #a29c8c; letter-spacing: 0.04em;
}
.blog-table-scroll { overflow-x: auto; margin: 24px 0; }
.blog-body table {
    width: 100%; border-collapse: collapse; font-family: 'IBM Plex Mono', monospace; font-size: 14px;
}
.blog-body thead tr { border-bottom: 2px solid #17150f; text-align: left; }
.blog-body th { padding: 10px 0; font-weight: 600; letter-spacing: 0.06em; text-align: left; }
.blog-body td { padding: 10px 0; }
.blog-body tbody tr { border-bottom: 1px solid #dcd8cd; }

/* Article tag list */
.blog-post-tags {
    display: flex; flex-wrap: wrap; gap: 8px; padding: 32px 0;
    border-top: 1px solid #dcd8cd; border-bottom: 1px solid #dcd8cd;
}
.blog-post-tags a {
    font-family: 'IBM Plex Mono', monospace; font-size: 12px; letter-spacing: 0.04em;
    padding: 6px 10px; border-radius: 2px; background: #eceadf; color: #6b675c;
}
.blog-post-tags a:hover { color: #17150f; }

/* Prev / next */
.blog-post-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; padding: 36px 0 12px; }
.blog-post-nav a {
    display: block; padding: 22px; border: 1px solid #dcd8cd; border-radius: 3px; color: #17150f;
    transition: border-color .12s, background .12s;
}
.blog-post-nav a:hover { border-color: #17150f; background: #efece4; color: #17150f; }
.blog-post-nav a.next { text-align: right; }
.blog-post-nav .label {
    font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.12em;
    color: #6b675c; margin-bottom: 10px;
}
.blog-post-nav .title { font-size: 17px; line-height: 1.35; font-weight: 600; }

.blog-loading {
    font-family: 'IBM Plex Mono', monospace; font-size: 13px; letter-spacing: 0.06em;
    color: #a29c8c; padding: 24px 0;
}

/* ── Responsive ─────────────────────────────────────────────────────────── */
@media (max-width: 720px) {
    .blog-frame, .blog-article { padding: 0 22px; }
    .blog-h1 { font-size: 56px; }
    .blog-post-title { font-size: 38px; }
    .blog-row { grid-template-columns: 1fr; gap: 8px; }
    .blog-post-nav { grid-template-columns: 1fr; }
    .blog-post-nav a.next { text-align: left; }
}