/* ============================================================================
   CFIN Blog — public surface (/blog + /blog/<slug>)
   Apple Design standards: SF Pro / Inter typography, refined tracking,
   Apple Glass tokens, Azure and Emerald product accents,
   author capsules, macOS window-dot code blocks, and timeline connectors.
   ========================================================================== */
:root {
    --maxw: 1120px;
    --reading-w: 700px;
    /* The landing's page gutter: 20px at 390, 54px at 834 (owner 2026-10-07, blog post). */
    --blog-gutter: clamp(20px, calc(20px + (100vw - 390px) * 0.0766), 54px);
    --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "SF Pro", Inter, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Monaco, Consolas, monospace;

    /* Apple Glass Design Tokens */
    --cfin-glass-bg: light-dark(rgba(255, 255, 255, 0.94), rgba(22, 24, 28, 0.94));
    --cfin-glass-border: 0.5px solid light-dark(rgba(0, 0, 0, 0.08), rgba(255, 255, 255, 0.1));
    --cfin-glass-shadow: light-dark(0 4px 20px rgba(0, 0, 0, 0.05), 0 8px 32px rgba(0, 0, 0, 0.36));
    --cfin-glass-card-bg: light-dark(rgba(255, 255, 255, 0.94), rgba(22, 24, 28, 0.94));

    /* Iris Ring identity gradient: Emerald -> Azure */
    --blog-iris-a: light-dark(#2FB864, #5ED68D);
    --blog-iris-b: light-dark(#0A84FF, #3A9BFF);
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

html {
    background-color: var(--color-background-body);
    color-scheme: dark;
}
html.light { color-scheme: light; }

body {
    font-family: var(--font);
    background: transparent;
    color: var(--color-text-primary);
    line-height: 1.68;
    letter-spacing: -0.005em;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}
a { color: inherit; }
img { max-width: 100%; }

/* ── Blog surfaces ────────────────────────────────────────────────────
   `.cfin-glass` is NOT defined here any more (owner 2026-10-11): this file used
   to redefine it at 94% opacity, which silently turned the shared header's glass
   into a solid bar on every blog page. There is ONE definition, in the generated
   cfin-theme.tokens.css (from frontend glass.css). Content links/cards are FLAT
   (owner rule: glass is chrome only), via .blog-flat-card below. */
.blog-flat-card {
    background: var(--cfin-glass-card-bg);
    border: var(--cfin-glass-border);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08), var(--cfin-glass-shadow);
}
.cfin-glass-pill {
    background: light-dark(rgba(0, 0, 0, 0.04), rgba(255, 255, 255, 0.07));
    border: 1px solid light-dark(rgba(0, 0, 0, 0.06), rgba(255, 255, 255, 0.1));
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: 999px;
}

/* ── Layout ──────────────────────────────────────────────────────── */
.blog-wrap { max-width: var(--maxw); margin: 0 auto; padding: 24px var(--blog-gutter) 0; min-width: 0; width: 100%; }

/* ── Index hero ──────────────────────────────────────────────────── */
.blog-hero { padding: clamp(32px, 6vw, 64px) 0 clamp(20px, 3vw, 36px); text-align: center; }
.blog-hero .kicker {
    display: inline-flex; align-items: center; gap: 6px;
    font-size: var(--cfin-text-footnote-size); font-weight: 600; letter-spacing: 0.02em;
    color: var(--color-accent); margin-bottom: 14px;
    padding: 3px 12px; border-radius: 999px;
    background: light-dark(rgba(10, 132, 255, 0.1), rgba(58, 155, 255, 0.12));
    border: 1px solid light-dark(rgba(10, 132, 255, 0.15), rgba(58, 155, 255, 0.2));
}
.blog-hero h1 {
    font-size: clamp(2rem, 4.5vw, 2.75rem); line-height: 1.15;
    font-weight: 700; letter-spacing: -0.025em;
    margin: 0 0 14px; text-wrap: balance; color: var(--color-text-primary);
}
.blog-hero p { color: var(--color-text-secondary); font-size: var(--cfin-text-body-size); line-height: 1.6; max-width: 60ch; margin: 0 auto; }

/* ── Category filter (capsule chips) ────────────────────────────── */
.blog-filter { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin: 6px 0 36px; }
.blog-filter a {
    display: inline-flex; align-items: center; justify-content: center; min-block-size: 36px; touch-action: manipulation;
    text-decoration: none; font-size: var(--cfin-text-footnote-size); font-weight: 600; color: var(--color-text-secondary);
    padding: 8px 18px; border-radius: var(--radius-full, 999px); border: 1px solid light-dark(rgba(0, 0, 0, 0.05), rgba(255, 255, 255, 0.08));
    background: light-dark(rgba(0, 0, 0, 0.04), rgba(255, 255, 255, 0.06));
    backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
    transition: background-color .18s ease, color .18s ease, border-color .18s ease, transform .18s ease;
}
.blog-filter a:hover { color: var(--color-text-primary); background: light-dark(rgba(0, 0, 0, 0.08), rgba(255, 255, 255, 0.12)); transform: translateY(-1px); }
.blog-filter a.is-active {
    color: var(--color-accent);
    background: var(--cfin-accent-tint);
    border-color: color-mix(in srgb, var(--color-accent) 40%, transparent);
    box-shadow: 0 0 12px color-mix(in srgb, var(--color-accent) 20%, transparent);
}

/* ── Search field (iOS / macOS spotlight style) ─────────────────── */
.blog-search { max-width: 440px; margin: 0 auto 24px; }
.blog-search-field { position: relative; display: flex; align-items: center; }
.blog-search-icon {
    position: absolute; left: 15px; width: 18px; height: 18px;
    color: var(--cfin-text-tertiary, var(--color-text-secondary)); pointer-events: none;
}
.blog-search-input {
    width: 100%; min-height: 44px; font-family: inherit; font-size: 15px;
    color: var(--color-text-primary);
    background: light-dark(rgba(255, 255, 255, 0.7), rgba(25, 30, 40, 0.7));
    backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
    border: 1px solid light-dark(rgba(0, 0, 0, 0.08), rgba(255, 255, 255, 0.1));
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.06);
    border-radius: var(--radius-full, 999px);
    padding: 10px 40px;
    transition: background-color .18s ease, border-color .18s ease, box-shadow .18s ease;
}
.blog-search-input::placeholder { color: var(--cfin-text-tertiary, var(--color-text-secondary)); opacity: 1; }
.blog-search-input:focus-visible, .blog-search-input:focus {
    outline: none;
    background: light-dark(rgba(255, 255, 255, 0.95), rgba(30, 36, 48, 0.9));
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-accent) 25%, transparent);
}
.blog-search-clear {
    position: absolute; right: 12px; display: grid; place-items: center;
    width: 22px; height: 22px; border-radius: 50%;
    color: var(--cfin-text-tertiary, var(--color-text-secondary));
    transition: color .18s ease, background-color .18s ease;
}
.blog-search-clear:hover { color: var(--color-text-primary); background: var(--cfin-fill-tertiary); }
.blog-search-clear svg { width: 16px; height: 16px; }

/* ── "What changed recently" summary band ────────────────────────── */
.blog-recent {
    display: flex; flex-direction: column; align-items: center; gap: 10px;
    margin: 0 auto 32px; max-width: 760px; text-align: center;
}
.blog-recent-label { font-size: var(--cfin-text-caption-1-size); font-weight: 600; letter-spacing: 0.01em; color: var(--cfin-text-tertiary); }
.blog-recent-chips { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.blog-recent-chip {
    display: inline-flex; align-items: center; gap: 8px; text-decoration: none;
    font-size: var(--cfin-text-footnote-size); font-weight: 550; color: var(--color-text-secondary);
    padding: 6px 14px; border-radius: 999px;
    background: light-dark(rgba(255, 255, 255, 0.65), rgba(25, 30, 40, 0.6));
    border: 1px solid light-dark(rgba(0, 0, 0, 0.06), rgba(255, 255, 255, 0.08));
    backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
    transition: transform .18s ease, color .18s ease, border-color .18s ease;
}
.blog-recent-chip:hover {
    transform: translateY(-1px);
    color: var(--color-text-primary);
    border-color: color-mix(in srgb, var(--blog-pc, var(--color-accent)) 45%, transparent);
}

/* ── Per-system identity (Azure, Emerald, Cyan, Orange palette) ── */
:is(.blog-legend-chip, .blog-recent-chip, .blog-badge--product, .blog-timeline-row)[data-product="iris"] {
    --blog-pc: var(--blog-iris-a); --blog-pc-2: var(--blog-iris-b);
    --blog-pc-ink: light-dark(#0B7B38, #5ED68D);
}
:is(.blog-legend-chip, .blog-recent-chip, .blog-badge--product, .blog-timeline-row)[data-product="website"] {
    --blog-pc: light-dark(#0066CC, #3A9BFF); --blog-pc-2: var(--blog-pc);
    --blog-pc-ink: light-dark(#0052A3, #64B5FF);
}
:is(.blog-legend-chip, .blog-recent-chip, .blog-badge--product, .blog-timeline-row)[data-product="app"] {
    --blog-pc: light-dark(#0088CC, #38BDF8); --blog-pc-2: var(--blog-pc);
    --blog-pc-ink: light-dark(#006699, #38BDF8);
}
:is(.blog-legend-chip, .blog-recent-chip, .blog-badge--product, .blog-timeline-row)[data-product="admin"] {
    --blog-pc: light-dark(#C05621, #FF9500); --blog-pc-2: var(--blog-pc);
    --blog-pc-ink: light-dark(#C05621, #FFA726);
}
:is(.blog-legend-chip, .blog-recent-chip, .blog-badge--product, .blog-timeline-row)[data-product="other"] {
    --blog-pc: var(--cfin-text-tertiary, var(--color-text-secondary)); --blog-pc-2: var(--blog-pc);
    --blog-pc-ink: var(--cfin-text-tertiary, var(--color-text-secondary));
}
.blog-recent-chip-dot { width: 7px; height: 7px; border-radius: 50%; background: linear-gradient(135deg, var(--blog-pc, var(--color-accent)), var(--blog-pc-2, var(--blog-pc, var(--color-accent)))); flex-shrink: 0; }
.blog-badge {
    display: inline-flex; align-items: center; gap: 4px;
    padding: 3px 10px; border-radius: 999px;
    font-size: var(--cfin-text-caption-1-size); font-weight: 600; letter-spacing: 0.01em;
    background: light-dark(rgba(0, 0, 0, 0.05), rgba(255, 255, 255, 0.08));
    color: var(--color-text-secondary);
}
.blog-badge--product {
    color: var(--blog-pc-ink, var(--color-accent));
    background: color-mix(in srgb, var(--blog-pc, var(--color-accent)) 15%, transparent);
    border: 1px solid color-mix(in srgb, var(--blog-pc, var(--color-accent)) 25%, transparent);
}

/* ── The legend chips (Apple Glass filter capsules) ──────────────── */
.blog-legend { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin: 6px auto 32px; max-width: 760px; }
.blog-legend-chip {
    display: flex; align-items: center; gap: 12px; text-decoration: none; min-width: 0;
    padding: 10px 18px 10px 12px; border-radius: var(--radius-full, 999px);
    background: var(--cfin-glass-card-bg);
    border: 1px solid light-dark(rgba(0, 0, 0, 0.06), rgba(255, 255, 255, 0.08));
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    box-shadow: none;
    transition: border-color .2s ease, background-color .2s ease, transform .2s cubic-bezier(0.16, 1, 0.3, 1);
}
.blog-legend-chip:hover {
    transform: translateY(-1px);
    background: light-dark(rgba(255, 255, 255, 0.88), rgba(28, 34, 44, 0.85));
}
.blog-legend-chip.is-active {
    border-color: color-mix(in srgb, var(--blog-pc, var(--color-accent)) 65%, transparent);
    background: color-mix(in srgb, var(--blog-pc, var(--color-accent)) 12%, var(--cfin-glass-card-bg));
    box-shadow: none;
}
.blog-legend-chip--all { --blog-pc: var(--color-accent); --blog-pc-ink: var(--color-accent); }
.blog-legend-icon {
    display: grid; place-items: center; flex-shrink: 0; width: 36px; height: 36px; border-radius: 50%;
    color: #fff; background: linear-gradient(135deg, var(--blog-pc, var(--color-accent)), var(--blog-pc-2, var(--blog-pc, var(--color-accent))));
    box-shadow: 0 2px 8px color-mix(in srgb, var(--blog-pc, var(--color-accent)) 35%, transparent);
}
.blog-legend-icon svg { width: 18px; height: 18px; }
.blog-legend-body { display: flex; flex-direction: column; min-width: 0; }
.blog-legend-name { font-size: var(--cfin-text-subheadline-size); font-weight: 650; color: var(--color-text-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.blog-legend-count { font-size: var(--cfin-text-caption-1-size); color: var(--cfin-text-tertiary); font-weight: 500; }

/* ── The timeline ────────────────────────────────────────────────── */
.blog-timeline { position: relative; padding-bottom: 32px; }

/* Spine track & fill */
.blog-timeline-spine {
    position: absolute;
    top: 6px;
    bottom: 6px;
    left: 50%;
    width: 3px;
    translate: -50% 0;
    z-index: 0;
    pointer-events: none;
    mask-image: linear-gradient(180deg, transparent 0%, black 24px, black calc(100% - 24px), transparent 100%);
    -webkit-mask-image: linear-gradient(180deg, transparent 0%, black 24px, black calc(100% - 24px), transparent 100%);
}
.blog-timeline-spine-track, .blog-timeline-spine-fill { position: absolute; inset: 0; border-radius: var(--radius-full, 999px); }
.blog-timeline-spine-track { background: var(--cfin-separator, var(--color-text-tertiary)); opacity: .28; }
.blog-timeline-spine-fill {
    background: linear-gradient(180deg, var(--color-accent, var(--cfin-brand-from)), var(--cfin-brand-to));
    box-shadow: 0 0 12px 2px color-mix(in srgb, var(--cfin-brand-from, var(--color-accent)) 45%, transparent);
    transform-origin: top;
    transform: scaleY(var(--spine-progress, 1));
}
@media (max-width: 899px) { .blog-timeline-spine { left: 20px; translate: -50% 0; } }

.blog-timeline-month { position: relative; z-index: 1; }

/* Sticky month capsule (Apple Glass pill) */
.blog-timeline-month-sticky-wrap { position: sticky; top: var(--blog-sticky-top, 64px); z-index: 3; display: flex; justify-content: center; align-items: flex-start; pointer-events: none; height: 0; }
.blog-timeline-month-sticky {
    pointer-events: auto; margin-top: 10px; padding: 7px 20px;
    font-size: var(--cfin-text-footnote-size); font-weight: 700; letter-spacing: -0.01em;
    color: var(--color-text-primary); border-radius: var(--radius-full, 999px);
    height: auto; line-height: 1.3;
}

/* Month section divider */
.blog-timeline-month-divider { display: flex; align-items: center; gap: 20px; margin: 60px 0 40px; }
.blog-timeline-month:first-child .blog-timeline-month-divider { margin-top: 12px; }
.blog-timeline-month-divider-rule { flex: 1 1 0; height: 1px; min-width: 24px; }
.blog-timeline-month-divider-rule--l { background: linear-gradient(90deg, transparent, var(--cfin-separator)); }
.blog-timeline-month-divider-rule--r { background: linear-gradient(90deg, var(--cfin-separator), transparent); }
.blog-timeline-month-divider-body { display: flex; flex-direction: column; align-items: center; text-align: center; gap: 4px; }
.blog-timeline-month-divider-body h2 {
    font-size: var(--cfin-text-title-2-size); font-weight: var(--cfin-text-title-2-weight);
    letter-spacing: -0.02em; margin: 0; color: var(--color-text-primary);
}
.blog-timeline-month-summary { margin: 0; font-size: var(--cfin-text-caption-1-size); color: var(--cfin-text-tertiary); display: flex; align-items: center; gap: 10px; flex-wrap: wrap; justify-content: center; }
.blog-timeline-month-summary-dot { width: 5px; height: 5px; border-radius: 50%; background: var(--blog-pc, currentColor); display: inline-block; margin-right: 4px; }

/* Day badge */
.blog-timeline-day { position: relative; margin-bottom: var(--space-4, 16px); }
.blog-timeline-day-badge-wrap { display: flex; justify-content: center; margin-bottom: var(--space-3, 12px); position: relative; z-index: 1; }
@media (max-width: 899px) {
    .blog-timeline-day-badge-wrap { justify-content: flex-start; padding-left: 0; width: 40px; display: flex; justify-content: center; }
    .blog-timeline-day-badge { width: 40px; height: 40px; }
    .blog-timeline-day-badge .d { font-size: 13px; }
    .blog-timeline-day-badge .m { font-size: 12px; }
}
.blog-timeline-day-badge {
    display: inline-flex; flex-direction: column; align-items: center; justify-content: center;
    width: 44px; height: 44px; border-radius: 50%;
    background: var(--color-background-body);
    border: 2px solid var(--cfin-separator);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    font-weight: 700; line-height: 1;
}
.blog-timeline-day-badge .d { font-size: 15px; color: var(--color-text-primary); }
.blog-timeline-day-badge .m { font-size: 12px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--cfin-text-tertiary); }

/* Day rows & grid */
.blog-timeline-day-rows { display: grid; gap: var(--space-5, 20px); }
.blog-timeline-row { position: relative; display: grid; grid-template-columns: minmax(0, 1fr) 40px minmax(0, 1fr); align-items: start; column-gap: 0; min-width: 0; }
.blog-timeline-row .blog-timeline-entry { grid-row: 1; grid-column: 1 / 2; justify-self: end; }
.blog-timeline-row.blog-timeline-row--right .blog-timeline-entry { grid-column: 3 / 4; justify-self: start; }
.blog-timeline-row .blog-timeline-node-col { grid-row: 1; grid-column: 2 / 3; position: relative; height: 0; z-index: 2; }
.blog-timeline-node {
    position: absolute; top: var(--node-y, 28px); left: 50%; translate: -50% -50%;
    width: 16px; height: 16px; border-radius: 50%; flex-shrink: 0;
    background: linear-gradient(135deg, var(--blog-pc, var(--color-accent)), var(--blog-pc-2, var(--blog-pc, var(--color-accent))));
    box-shadow: 0 0 0 3px light-dark(#fff, #000), 0 0 0 5px color-mix(in srgb, var(--blog-pc, var(--color-accent)) 50%, transparent);
    transition: scale .18s ease;
}
@media (prefers-reduced-motion: no-preference) {
    .blog-timeline-row--newest .blog-timeline-node { animation: blog-node-pulse 2.4s ease-in-out infinite; }
}
@keyframes blog-node-pulse {
    0%, 100% { box-shadow: 0 0 0 3px light-dark(#fff, #000), 0 0 0 5px color-mix(in srgb, var(--blog-pc, var(--color-accent)) 50%, transparent); }
    50% { box-shadow: 0 0 0 3px light-dark(#fff, #000), 0 0 0 10px color-mix(in srgb, var(--blog-pc, var(--color-accent)) 25%, transparent); }
}
.blog-timeline-row:hover .blog-timeline-node { scale: 1.2; }

/* The connector */
.blog-timeline-node-col::before {
    content: ""; position: absolute; top: var(--node-y, 28px); height: 2px; width: 20px; translate: 0 -50%;
    background: var(--blog-pc, var(--color-accent));
}
.blog-timeline-row:not(.blog-timeline-row--right) .blog-timeline-node-col::before { right: 50%; }
.blog-timeline-row--right .blog-timeline-node-col::before { left: 50%; }
@media (max-width: 899px) {
    .blog-timeline-row { grid-template-columns: 40px minmax(0, 1fr); }
    .blog-timeline-row .blog-timeline-entry, .blog-timeline-row.blog-timeline-row--right .blog-timeline-entry {
        grid-column: 2 / 3;
        justify-self: stretch;
        width: 100% !important;
        max-width: 100% !important;
    }
    .blog-timeline-row .blog-timeline-node-col { grid-column: 1 / 2; }
    .blog-timeline-node-col::before { left: 50%; right: auto; width: 20px; }
}
@media (max-width: 600px) {
    .blog-wrap { padding-top: 16px; }
}
@media (max-width: 480px) {
    .blog-legend { grid-template-columns: repeat(2, 1fr); gap: 8px; }
}

/* Desktop stagger (owner 2026-10-08: posts "a little bit closer together").
   The month's days and rows dissolve into ONE 3-column grid (`display: contents`)
   so consecutive posts overlap ACROSS days, not just within one. Every row spans
   two grid rows starting at its own index (`--i`, set in _timeline_macro.html),
   so the next post (other side of the spine, sides alternate strictly: api/blog.py)
   starts about half-way down the previous card; card k+2 starts below card k, so
   same-side cards never collide. A day's badge sits on the spine at the grid row
   where its first card starts, i.e. level with that card's top. */
@media (min-width: 900px) {
    .blog-timeline-month-rows { display: grid; grid-template-columns: minmax(0, 1fr) 40px minmax(0, 1fr); column-gap: 0; row-gap: var(--space-4, 16px); }
    .blog-timeline-month-rows > .blog-timeline-day,
    .blog-timeline-month-rows .blog-timeline-day-rows { display: contents; }
    .blog-timeline-month-rows .blog-timeline-day-badge-wrap {
        grid-column: 2; grid-row: var(--i, 1); align-self: start; justify-self: center; margin: 0; z-index: 3;
    }
    .blog-timeline-month-rows .blog-timeline-row {
        grid-column: 1 / -1; grid-template-columns: subgrid; align-self: start; pointer-events: none;
        grid-row: var(--i, 1) / span 2;
    }
    .blog-timeline-month-rows .blog-timeline-row .blog-timeline-entry { pointer-events: auto; }
    /* 36px, like the phone badge: the 40px spine column is the only room between the cards. */
    .blog-timeline-month-rows .blog-timeline-day-badge { width: 40px; height: 40px; }
    .blog-timeline-month-rows .blog-timeline-day-badge .d { font-size: 13px; }
    .blog-timeline-month-rows .blog-timeline-day-badge .m { font-size: 12px; }
}

/* ── Entry Card (Apple Glass Styling) ────────────────────────────── */
.blog-timeline-entry {
    position: relative; display: flex; flex-direction: column; min-width: 0; width: min(100%, 430px); text-decoration: none;
    border-radius: var(--card-radius, 20px);
    background: var(--cfin-glass-card-bg);
    border: 1px solid light-dark(rgba(0, 0, 0, 0.06), rgba(255, 255, 255, 0.08));
    backdrop-filter: blur(28px) saturate(180%);
    -webkit-backdrop-filter: blur(28px) saturate(180%);
    box-shadow: light-dark(0 2px 12px rgba(0, 0, 0, 0.04), 0 4px 20px rgba(0, 0, 0, 0.25));
    overflow: hidden;
    transition: transform .25s cubic-bezier(0.16, 1, 0.3, 1), box-shadow .25s cubic-bezier(0.16, 1, 0.3, 1), border-color .2s ease;
    scroll-margin-top: 112px;
}
.blog-timeline-entry::before {
    content: ""; position: absolute; top: 0; bottom: 0; width: 4px;
    background: linear-gradient(180deg, var(--blog-pc, var(--color-accent)), var(--blog-pc-2, var(--blog-pc, var(--color-accent))));
}
.blog-timeline-row:not(.blog-timeline-row--right) .blog-timeline-entry::before { right: 0; }
.blog-timeline-row--right .blog-timeline-entry::before { left: 0; }
@media (max-width: 899px) { .blog-timeline-entry::before { left: 0; right: auto; } }
.blog-timeline-entry:hover {
    transform: translateY(-3px);
    box-shadow: light-dark(0 10px 30px rgba(0, 0, 0, 0.08), 0 12px 36px -8px color-mix(in srgb, var(--blog-pc, var(--color-accent)) 40%, transparent));
    border-color: color-mix(in srgb, var(--blog-pc, var(--color-accent)) 30%, transparent);
}
.blog-timeline-entry:target { outline: 2px solid var(--blog-pc, var(--color-accent)); outline-offset: -2px; }

/* Thumbnail box (fixed 180px height per Lead C & test requirement) */
.blog-timeline-thumb {
    display: block; width: 100%; aspect-ratio: 16 / 9; overflow: hidden;
    background: linear-gradient(135deg, color-mix(in srgb, var(--blog-pc, var(--color-accent)) 26%, transparent), color-mix(in srgb, var(--blog-pc-2, var(--blog-pc, var(--color-accent))) 16%, transparent));
}
.blog-timeline-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }

/* Compact strip for posts without images */
.blog-timeline-strip {
    display: flex; align-items: center; gap: 8px; height: 56px; padding: 0 18px;
    color: #fff; background: linear-gradient(135deg, var(--blog-pc, var(--color-accent)), var(--blog-pc-2, var(--blog-pc, var(--color-accent))));
}
.blog-timeline-strip-icon { display: flex; width: 18px; height: 18px; flex-shrink: 0; }
.blog-timeline-strip-icon svg { width: 100%; height: 100%; }
.blog-timeline-strip-cat { font-size: var(--cfin-text-footnote-size); font-weight: 650; letter-spacing: -0.01em; }

.blog-timeline-body { display: flex; flex-direction: column; min-width: 0; padding: 18px 20px 20px; }
.blog-timeline-eyebrow { display: flex; align-items: center; gap: 6px; margin-bottom: 8px; font-size: var(--cfin-text-caption-1-size); font-weight: 700; letter-spacing: 0.02em; color: var(--blog-pc-ink, var(--color-accent)); }
.blog-timeline-eyebrow svg { width: 14px; height: 14px; flex-shrink: 0; }
.blog-timeline-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; }
.blog-timeline-title {
    font-size: var(--cfin-text-title-3-size); font-weight: var(--cfin-text-title-3-weight);
    line-height: var(--cfin-text-title-3-leading); letter-spacing: -0.015em; color: var(--color-text-primary);
    margin-bottom: 6px;
}
.blog-timeline-excerpt {
    color: var(--color-text-secondary); font-size: var(--cfin-text-subheadline-size);
    line-height: 1.55; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
    margin-bottom: 12px;
}
.blog-timeline-meta { font-size: var(--cfin-text-caption-1-size); color: var(--cfin-text-tertiary); display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.blog-meta-dot { color: var(--cfin-text-tertiary); opacity: .8; }
.blog-date { font-weight: 500; }

/* ── Author capsule & reading time pill ─────────────────────────── */
.author-capsule {
    display: inline-flex; align-items: center; gap: 6px;
    background: light-dark(rgba(0, 0, 0, 0.04), rgba(255, 255, 255, 0.06));
    padding: 2px 8px 2px 4px; border-radius: 999px;
    border: 1px solid light-dark(rgba(0, 0, 0, 0.04), rgba(255, 255, 255, 0.08));
}
.author-avatar {
    width: 18px; height: 18px; border-radius: 50%;
    background: linear-gradient(135deg, var(--color-accent), var(--blog-iris-a));
    display: inline-flex; align-items: center; justify-content: center;
    color: #fff; overflow: hidden; flex-shrink: 0;
}
.author-avatar svg { width: 12px; height: 12px; }
.author-name { font-weight: 550; color: var(--color-text-primary); font-size: var(--cfin-text-caption-1-size); }
.read-time-pill {
    display: inline-flex; align-items: center; gap: 4px;
    background: light-dark(rgba(0, 0, 0, 0.03), rgba(255, 255, 255, 0.05));
    border: 1px solid light-dark(rgba(0, 0, 0, 0.04), rgba(255, 255, 255, 0.07));
    padding: 2px 8px; border-radius: 999px;
    font-size: var(--cfin-text-caption-1-size); font-weight: 500; color: var(--cfin-text-tertiary);
}

/* ── Motion & Slide-in reveal ────────────────────────────────────── */
.blog-timeline.js-motion .blog-timeline-row[data-motion-row] {
    opacity: 0; translate: 0 16px;
    transition: opacity .4s cubic-bezier(0.16, 1, 0.3, 1), translate .4s cubic-bezier(0.16, 1, 0.3, 1);
}
.blog-timeline.js-motion .blog-timeline-row[data-motion-row].is-revealed,
.blog-timeline.js-motion .blog-timeline-row[data-motion-row].is-in {
    opacity: 1; translate: 0 0;
}

/* ── Sentinel & Empty State ──────────────────────────────────────── */
.blog-loadmore-sentinel { display: block; text-align: center; padding: 20px; color: var(--color-accent); text-decoration: none; font-weight: 600; font-size: var(--cfin-text-subheadline-size); }
.blog-empty { text-align: center; padding: 60px 20px; color: var(--color-text-secondary); font-size: var(--cfin-text-body-size); }
.blog-empty a { color: var(--color-accent); text-decoration: underline; text-underline-offset: 2px; }

/* ============================================================================
   ARTICLE DETAIL PAGE (/blog/<slug>)
   ========================================================================== */
.article { box-sizing: border-box; width: 100%; max-width: calc(var(--reading-w) + 2 * var(--blog-gutter)); margin: 0 auto; padding: 28px var(--blog-gutter) 80px; min-width: 0; overflow-wrap: anywhere; }
/* Below the desktop layout the column runs gutter to gutter (reading width caps it only above). */
@media (max-width: 899px) { .article { max-width: none; } }

/* Navigation bar: Breadcrumbs, Back link & Share button */
.article-nav-bar {
    display: flex; align-items: center; justify-content: space-between; gap: 16px;
    margin-bottom: 28px; padding-bottom: 16px; border-bottom: 1px solid var(--cfin-separator);
}
.article-back {
    display: inline-flex; align-items: center; gap: 6px;
    font-size: var(--cfin-text-footnote-size); font-weight: 600; text-decoration: none;
    color: var(--color-accent); transition: opacity .18s ease, transform .18s ease;
}
.article-back:hover { opacity: .8; transform: translateX(-2px); }
.article-nav-tools { display: flex; align-items: center; gap: 14px; }
.article-breadcrumbs {
    display: flex; align-items: center; gap: 6px;
    font-size: var(--cfin-text-caption-1-size); color: var(--cfin-text-tertiary); font-weight: 500;
}
.article-breadcrumbs a { text-decoration: none; transition: color .18s ease; }
.article-breadcrumbs a:hover { color: var(--color-text-primary); }
.article-breadcrumbs .sep { opacity: .4; }
.article-breadcrumbs .curr { color: var(--color-text-secondary); max-width: 140px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
@media (max-width: 640px) { .article-breadcrumbs { display: none; } }

/* Share button pill with interactive copied feedback */
.article-share-btn {
    position: relative; display: inline-flex; align-items: center; gap: 6px; cursor: pointer;
    font-family: inherit; font-size: var(--cfin-text-caption-1-size); font-weight: 600;
    color: var(--color-text-primary); padding: 5px 12px;
    border: 1px solid light-dark(rgba(0, 0, 0, 0.08), rgba(255, 255, 255, 0.12));
    transition: background-color .18s ease, transform .18s ease;
}
.article-share-btn:hover { background: light-dark(rgba(0, 0, 0, 0.08), rgba(255, 255, 255, 0.12)); transform: translateY(-1px); }
.article-share-btn svg { width: 14px; height: 14px; color: var(--color-accent); }
.article-share-btn .share-toast {
    position: absolute; inset: 0; display: grid; place-items: center;
    background: var(--cfin-profit); color: #fff; border-radius: 999px;
    font-size: 11px; font-weight: 700; opacity: 0; pointer-events: none;
    transition: opacity .2s ease, transform .2s ease; transform: scale(0.9);
}
.article-share-btn.is-copied .share-toast { opacity: 1; transform: scale(1); pointer-events: auto; }

/* Article Header */
.article-head { margin-bottom: 32px; }
.article-head h1 {
    font-size: clamp(2rem, 4vw, 2.75rem); line-height: 1.18;
    font-weight: 750; letter-spacing: -0.025em;
    margin: 14px 0 18px; color: var(--color-text-primary);
}
.article-meta { display: flex; align-items: center; justify-content: center; gap: 10px; flex-wrap: wrap; }
/* One editorial rule for headers: a centred title block, on the index hero and on a post. */
.article-head { text-align: center; }
.article-head .blog-timeline-tags { justify-content: center; }
.author-capsule-lg {
    padding: 3px 12px 3px 5px;
    background: light-dark(rgba(0, 0, 0, 0.04), rgba(255, 255, 255, 0.06));
    border: 1px solid light-dark(rgba(0, 0, 0, 0.06), rgba(255, 255, 255, 0.1));
}
.author-avatar-lg { width: 22px; height: 22px; }
.author-avatar-lg svg { width: 14px; height: 14px; }
.author-name-lg { font-size: var(--cfin-text-subheadline-size); font-weight: 600; color: var(--color-text-primary); }
.article-date { font-size: var(--cfin-text-subheadline-size); color: var(--cfin-text-secondary); font-weight: 500; }
.read-time-pill--lg { font-size: var(--cfin-text-caption-1-size); padding: 3px 10px; }

/* Cover image */
.article-cover {
    border-radius: var(--card-radius, 20px); overflow: hidden; margin: 0 0 32px;
    box-shadow: light-dark(0 6px 24px rgba(0, 0, 0, 0.06), 0 10px 32px rgba(0, 0, 0, 0.35));
}
.article-cover img { width: 100%; display: block; }

/* PDF download pill */
.article-pdf {
    display: inline-flex; align-items: center; gap: 10px; text-decoration: none;
    padding: 12px 20px; border-radius: var(--radius-full, 999px); margin: 2px 0 28px; font-weight: 600; font-size: var(--cfin-text-subheadline-size);
    color: var(--color-accent); transition: transform .18s ease, background-color .18s ease;
}
.article-pdf:hover { transform: translateY(-1px); background: light-dark(rgba(255, 255, 255, 0.95), rgba(26, 32, 42, 0.95)); }

/* Article body typography */
.article-body { font-size: 1.0625rem; line-height: 1.72; color: var(--color-text-primary); letter-spacing: -0.003em; }
.article-body > *:first-child { margin-top: 0; }
.article-body p { margin: 0 0 20px; color: var(--color-text-primary); }
.article-body h2 { font-size: 1.625rem; font-weight: 700; letter-spacing: -0.02em; line-height: 1.25; margin: 40px 0 14px; }
.article-body h3 { font-size: 1.25rem; font-weight: 650; letter-spacing: -0.015em; line-height: 1.35; margin: 32px 0 12px; }
.article-body h4 { font-size: var(--cfin-text-headline-size); font-weight: var(--cfin-text-headline-weight); margin: 24px 0 10px; }
.article-body ul, .article-body ol { margin: 0 0 20px; padding-left: 24px; }
.article-body li { margin: 8px 0; }
.article-body a { color: var(--color-accent); text-decoration: underline; text-underline-offset: 3px; }
.article-body img { border-radius: var(--card-radius, 20px); margin: 12px 0 24px; }
.article-body img, .article-body svg, .article-body video { max-width: 100%; height: auto; }
.article-body figure { margin: 0 0 24px; max-width: 100%; }
.article-body figure img { margin-bottom: 8px; }
.article-body pre, .article-body table { max-width: 100%; }
.article-body pre code { overflow-wrap: normal; }

/* Theme-matched infographics (Strict test requirements — exactly 5 selectors) */
:root[data-theme="light"] { color-scheme: light; }
:root[data-theme="dark"] { color-scheme: dark; }
:root[data-theme="dark"] .blog-theme-img--light,
:root[data-theme="light"] .blog-theme-img--dark,
:root.light:not([data-theme="light"]):not([data-theme="dark"]) .blog-theme-img--dark { display: none; }
@media (prefers-color-scheme: light) {
    :root:not([data-theme="light"]):not([data-theme="dark"]) .blog-theme-img--dark { display: none; }
}
@media (prefers-color-scheme: dark) {
    :root:not(.light):not([data-theme="light"]):not([data-theme="dark"]) .blog-theme-img--light { display: none; }
}

/* Screenshots with no capture in the other scheme (api/blog.py, themes.json): a hairline frame keeps
   the edge, and a light capture is eased down on a dark page so it does not glare. Same page-scheme
   signal as the swap above, restated; `blog-shot--on-dark` needs nothing in light mode. */
.article-body img.blog-shot { border: 1px solid var(--color-border); }
:root[data-theme="dark"] .article-body img.blog-shot--on-light { filter: brightness(0.88); }
@media (prefers-color-scheme: dark) {
    :root:not(.light):not([data-theme="light"]):not([data-theme="dark"]) .article-body img.blog-shot--on-light { filter: brightness(0.88); }
}

.article-body blockquote {
    margin: 24px 0; padding: 8px 22px; border-left: 3px solid var(--cfin-profit);
    background: light-dark(rgba(47, 184, 100, 0.05), rgba(94, 214, 141, 0.06));
    border-radius: 0 10px 10px 0;
    color: var(--color-text-secondary); font-style: italic;
}
.article-body code {
    font-family: var(--font-mono); font-size: 0.9em;
    background: light-dark(rgba(0, 0, 0, 0.05), rgba(255, 255, 255, 0.08));
    padding: 2px 7px; border-radius: 6px;
    border: 1px solid light-dark(rgba(0, 0, 0, 0.04), rgba(255, 255, 255, 0.08));
}

/* macOS terminal window-dot code blocks */
.article-body pre {
    position: relative;
    background: light-dark(#181b22, #0d1117);
    color: #e6edf3;
    border: 1px solid light-dark(rgba(0, 0, 0, 0.12), rgba(255, 255, 255, 0.1));
    border-radius: var(--card-radius, 20px);
    padding: 40px 20px 18px;
    overflow-x: auto;
    margin: 24px 0 28px;
    box-shadow: light-dark(0 4px 20px rgba(0, 0, 0, 0.06), 0 8px 30px rgba(0, 0, 0, 0.35));
}
.article-body pre::before {
    content: "";
    position: absolute;
    top: 15px;
    left: 18px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #ff5f56;
    box-shadow: 16px 0 0 #ffbd2e, 32px 0 0 #27c93f;
}
.article-body pre code {
    background: none; border: none; padding: 0; color: inherit; font-size: 0.88rem; line-height: 1.5;
}

.article-body table { display: block; max-width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; width: 100%; border-collapse: collapse; margin: 0 0 24px; font-size: var(--cfin-text-subheadline-size); }
.article-body th, .article-body td { border-bottom: 1px solid var(--cfin-separator); padding: 10px 12px; text-align: left; }
.article-body th { font-weight: 650; }

/* "What changed" summary box */
.post-summary {
    background: var(--cfin-glass-card-bg);
    border: var(--cfin-glass-border);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--card-radius, 20px);
    padding: 20px 24px;
    margin: 0 0 32px;
    box-shadow: var(--cfin-glass-shadow);
}
.post-summary-kicker {
    margin: 0 0 10px;
    font-size: var(--cfin-text-footnote-size);
    font-weight: 650;
    color: var(--color-accent);
}
.post-summary ul { margin: 0; padding-left: 20px; }
.post-summary li { margin: 6px 0; color: var(--color-text-primary); font-size: var(--cfin-text-subheadline-size); }

/* Theme-aware post infographics */
.post-infographic { margin: 12px 0 26px; }
.post-infographic img { width: 100%; height: auto; display: block; border-radius: var(--card-radius, 20px); }
.post-infographic figcaption { margin-top: 10px; font-size: var(--cfin-text-caption-1-size); color: var(--cfin-text-tertiary); text-align: center; }

/* "Previous / Next update" adjacent navigation */
.article-adjacent { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 44px 0 0; }
@media (max-width: 480px) { .article-adjacent { grid-template-columns: 1fr; } }
.article-adjacent-link {
    display: flex; flex-direction: column; gap: 6px; text-decoration: none; min-width: 0;
    padding: 16px 20px; border-radius: var(--card-radius, 20px);
    transition: transform .2s cubic-bezier(0.16, 1, 0.3, 1), box-shadow .2s ease, background-color .2s ease;
}
.article-adjacent-link:hover {
    transform: translateY(-2px);
    box-shadow: light-dark(0 6px 20px rgba(0, 0, 0, 0.06), 0 8px 24px rgba(0, 0, 0, 0.32));
    background: light-dark(rgba(255, 255, 255, 0.95), rgba(28, 34, 44, 0.95));
}
.article-adjacent-link--next { text-align: right; align-items: flex-end; }
.article-adjacent-dir { font-size: var(--cfin-text-caption-1-size); font-weight: 600; color: var(--cfin-text-tertiary); }
.article-adjacent-title {
    font-size: var(--cfin-text-subheadline-size); font-weight: 650; color: var(--color-text-primary);
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 100%;
}

/* More reading */
.more-reading { border-top: 1px solid var(--cfin-separator); margin-top: 48px; padding-top: 32px; }
.more-reading h3 { font-size: var(--cfin-text-footnote-size); letter-spacing: 0.02em; color: var(--cfin-text-tertiary); margin: 0 0 16px; font-weight: 600; text-transform: uppercase; }
.more-list { display: grid; gap: 6px; }
.more-list a {
    text-decoration: none; display: flex; flex-direction: column; gap: 4px; padding: 14px 18px;
    border-radius: 12px; transition: background-color .18s ease, transform .18s ease;
}
.more-list a:hover { background: light-dark(rgba(0, 0, 0, 0.04), rgba(255, 255, 255, 0.06)); transform: translateX(3px); }
.more-list strong { font-weight: 650; font-size: var(--cfin-text-subheadline-size); color: var(--color-text-primary); }
.more-list span { font-size: var(--cfin-text-caption-1-size); color: var(--cfin-text-tertiary); }


/* Touch: the site's 44px floor on a coarse pointer (Apple HIG / spec §4.7). */
@media (pointer: coarse), (max-width: 767px) {
    .blog-filter a { min-block-size: 44px; min-inline-size: 44px; padding-inline: 16px; }
    .blog-recent-chip { min-block-size: 44px; min-inline-size: 44px; padding-inline: 12px; }
    .article-back { min-block-size: 44px; }
}

/* Tabular numerals & Apple SF Pro tracking unification */
.blog-date,
.blog-recent-chip-date,
.blog-timeline-date,
.read-time-pill,
.blog-reading-time,
.blog-badge {
    font-variant-numeric: tabular-nums lining-nums;
}
.blog-hero h1,
.blog-timeline-title,
.post-header h1,
.article-body h2,
.article-body h3 {
    letter-spacing: -0.02em;
}