/* =========================================================================
   Blog (posts index / page_for_posts) - featured post + filterable grid
   Ported from the Claude Design "Blog" template. Chrome is global (style.css);
   everything else is scoped under the .at-blog body class.
   ========================================================================= */

body.at-blog {
    background: var(--paper);
    color: var(--ink);
    font-family: 'IBM Plex Sans', system-ui, sans-serif;
}

/* -------------------------------------------------------------------------
   Typography (overrides the generic global .h1/.h2/.h3/.eyebrow)
   ------------------------------------------------------------------------- */

.at-blog .h1 {
    font-family: 'Archivo', system-ui, sans-serif;
    font-weight: 800;
    letter-spacing: -0.025em;
    line-height: 0.98;
    font-size: clamp(40px, 5vw, 60px);
    margin: 0;
}
.at-blog .h2 {
    font-family: 'Archivo', system-ui, sans-serif;
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.05;
    font-size: clamp(26px, 2.4vw, 34px);
    color: var(--ink);
    margin: 0;
}
.at-blog .h3 {
    font-family: 'Archivo', system-ui, sans-serif;
    font-weight: 700;
    letter-spacing: -0.01em;
    font-size: 22px;
    line-height: 1.12;
    color: var(--ink);
    margin: 0;
}
.at-blog .lead   { font-size: 18px; line-height: 1.6; color: var(--ink-soft); }
.at-blog .mono   { font-family: 'IBM Plex Mono', monospace; }
.at-blog .accent { color: var(--accent); }
.at-blog .muted  { color: var(--ink-soft); }

.at-blog .eyebrow {
    display: inline-block;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--accent);
    font-weight: 500;
}
.at-blog .eyebrow-light {
    display: inline-block;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.82);
    font-weight: 500;
}

/* -------------------------------------------------------------------------
   Sections + utilities + page-only buttons
   ------------------------------------------------------------------------- */

.at-blog .sec  { padding: 104px 0; }
.at-blog .wrap { flex-wrap: wrap; }

.at-blog .btn-light {
    background: #fff;
    color: var(--ink) !important;
    border-color: #fff;
}
.at-blog .btn-light:hover { background: rgba(255, 255, 255, 0.88); border-color: rgba(255, 255, 255, 0.88); }
.at-blog .btn-outline {
    background: transparent;
    color: #fff !important;
    border-color: #fff;
}
.at-blog .btn-outline:hover { background: rgba(255, 255, 255, 0.08); }

/* -------------------------------------------------------------------------
   Head band + topics index
   ------------------------------------------------------------------------- */

.at-blog .head-band { background: var(--accent); color: #fff; }
.at-blog .head-band .h1 { color: #fff; }
.at-blog .head-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 56px;
    align-items: end;
}
.at-blog .crumbs {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.7);
}
.at-blog .crumbs a { text-decoration: none; color: rgba(255, 255, 255, 0.7); }
.at-blog .crumbs a:hover { color: #fff; }

.at-blog .topics { display: flex; flex-direction: column; border-top: 1px solid rgba(255, 255, 255, 0.25); }
.at-blog .topics a {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 2px;
    text-decoration: none;
    color: #fff;
    border-bottom: 1px solid rgba(255, 255, 255, 0.25);
    font-family: 'Archivo', system-ui, sans-serif;
    font-weight: 700;
    font-size: 16px;
    transition: 0.15s;
}
.at-blog .topics a:hover { padding-left: 10px; }
.at-blog .topics .tn { font-family: 'IBM Plex Mono', monospace; font-size: 12px; font-weight: 500; color: rgba(255, 255, 255, 0.7); }

/* -------------------------------------------------------------------------
   Photo placeholders
   ------------------------------------------------------------------------- */

.at-blog .ph {
    position: relative;
    display: flex;
    align-items: flex-end;
    justify-content: flex-start;
    background: repeating-linear-gradient(135deg, #E7E1D4 0 16px, #DDD6C6 16px 32px);
    border: 1px solid var(--line);
    overflow: hidden;
}
.at-blog .ph-tag {
    margin: 14px;
    padding: 6px 11px;
    background: rgba(255, 255, 255, 0.86);
    border: 1px solid var(--line);
    font-family: 'IBM Plex Mono', monospace;
    font-size: 10.5px;
    letter-spacing: 0.13em;
    color: #7C7565;
    text-transform: uppercase;
}

/* -------------------------------------------------------------------------
   Featured post
   ------------------------------------------------------------------------- */

.at-blog .feat { display: grid; grid-template-columns: 1.15fr 0.85fr; border: 1px solid var(--line); background: #fff; text-decoration: none; color: var(--ink); }
.at-blog .feat-img { min-height: 440px; align-self: stretch; background-size: cover; background-position: center; }
.at-blog .feat-b { padding: 48px 48px 44px; display: flex; flex-direction: column; justify-content: center; gap: 20px; }
.at-blog .feat-flag {
    position: absolute;
    top: 0;
    left: 0;
    background: var(--accent);
    color: #fff;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    padding: 8px 14px;
}
.at-blog .kicker { font-family: 'IBM Plex Mono', monospace; font-size: 11.5px; letter-spacing: 0.15em; text-transform: uppercase; color: var(--accent); font-weight: 500; }
.at-blog .feat-t { font-family: 'Archivo', system-ui, sans-serif; font-weight: 800; letter-spacing: -0.02em; line-height: 1.04; font-size: clamp(28px, 2.8vw, 38px); }
.at-blog .feat-e { font-size: 16.5px; line-height: 1.62; color: var(--ink-soft); }
.at-blog .meta { display: flex; align-items: center; gap: 10px; font-family: 'IBM Plex Mono', monospace; font-size: 12px; letter-spacing: 0.04em; color: var(--ink-soft); }
.at-blog .meta .dot { color: var(--line); }

/* -------------------------------------------------------------------------
   Filters + article grid
   ------------------------------------------------------------------------- */

.at-blog .filters { display: flex; flex-wrap: wrap; gap: 10px; }
.at-blog .chip {
    font-family: 'Archivo', system-ui, sans-serif;
    font-weight: 700;
    font-size: 13.5px;
    letter-spacing: 0.01em;
    padding: 9px 17px;
    border: 1.5px solid var(--line);
    background: transparent;
    color: var(--ink-soft);
    cursor: pointer;
    transition: 0.14s;
    line-height: 1;
}
.at-blog .chip:hover { border-color: var(--ink); color: var(--ink); }
.at-blog .chip.on { background: var(--ink); border-color: var(--ink); color: var(--paper); }

.at-blog .cardgrid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.at-blog .pcard { display: flex; flex-direction: column; text-decoration: none; color: var(--ink); background: #fff; border: 1px solid var(--line); transition: 0.16s; }
.at-blog .pcard:hover { transform: translateY(-4px); box-shadow: 0 20px 34px -22px rgba(26, 28, 30, 0.42); }
.at-blog .pcard-img { min-height: 196px; align-self: stretch; background-size: cover; background-position: center; }
.at-blog .pcard-b { padding: 24px 24px 26px; display: flex; flex-direction: column; gap: 12px; flex: 1; }
.at-blog .pcard-t { font-family: 'Archivo', system-ui, sans-serif; font-weight: 700; font-size: 20px; letter-spacing: -0.01em; line-height: 1.18; }
.at-blog .pcard-e { font-size: 14.5px; line-height: 1.55; color: var(--ink-soft); flex: 1; }
.at-blog .pcard-m { display: flex; align-items: center; gap: 9px; font-family: 'IBM Plex Mono', monospace; font-size: 11.5px; letter-spacing: 0.03em; color: var(--ink-soft); padding-top: 4px; }
.at-blog .pcard-m .dot { color: var(--line); }
.at-blog .pcard:hover .pcard-t { color: var(--accent); }

.at-blog .blog-empty { padding: 40px; border: 1px dashed var(--line); color: var(--ink-soft); text-align: center; }
.at-blog .blog-pagination { margin-top: 48px; display: flex; justify-content: center; gap: 8px; }
.at-blog .blog-pagination .page-numbers {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 13px;
    padding: 10px 15px;
    border: 1px solid var(--line);
    color: var(--ink-soft);
    text-decoration: none;
}
.at-blog .blog-pagination .page-numbers.current,
.at-blog .blog-pagination .page-numbers:hover { background: var(--ink); border-color: var(--ink); color: var(--paper); }

/* -------------------------------------------------------------------------
   Newsletter (dark)
   ------------------------------------------------------------------------- */

.at-blog .nl { background: var(--ink); color: var(--paper); display: grid; grid-template-columns: 1fr 0.9fr; gap: 56px; align-items: center; padding: 56px; }
/* colour must be set explicitly: the global `h1..h6` rule matches this h2
   directly and so beats the `color` it would otherwise inherit from `.nl`. */
.at-blog .nl-t { font-family: 'Archivo', system-ui, sans-serif; font-weight: 800; letter-spacing: -0.02em; line-height: 1.05; font-size: clamp(24px, 2.4vw, 32px); color: #fff; }
.at-blog .nl-d { font-size: 15.5px; line-height: 1.6; color: #C2BCAF; margin-top: 14px; max-width: 420px; }
.at-blog .nl-form { display: flex; gap: 10px; flex-wrap: wrap; }
.at-blog .nl-input {
    flex: 1;
    min-width: 200px;
    height: 52px;
    padding: 0 16px;
    background: #26292C;
    border: 1px solid #3A3D41;
    color: var(--paper);
    font-family: 'IBM Plex Sans', system-ui, sans-serif;
    font-size: 15px;
}
.at-blog .nl-input::placeholder { color: #8C8678; }
.at-blog .nl-input:focus { outline: none; border-color: var(--accent); }
.at-blog .nl-note { font-family: 'IBM Plex Mono', monospace; font-size: 11px; color: #7C7669; letter-spacing: 0.03em; margin-top: 14px; }

/* -------------------------------------------------------------------------
   Responsive
   ------------------------------------------------------------------------- */

@media (max-width: 900px) {
    .at-blog .sec { padding: 64px 0; }
    .at-blog .head-grid { grid-template-columns: 1fr; gap: 40px; align-items: start; }
    .at-blog .feat { grid-template-columns: 1fr; }
    .at-blog .feat-img { min-height: 260px; }
    .at-blog .feat-b { padding: 32px; }
    .at-blog .cardgrid { grid-template-columns: 1fr; }
    .at-blog .nl { grid-template-columns: 1fr; gap: 28px; padding: 40px 32px; }
}

@media (min-width: 601px) and (max-width: 900px) {
    .at-blog .cardgrid { grid-template-columns: 1fr 1fr; }
}