/* ==========================================================================
   Blog styling — a two-column editorial layout (article + sticky sidebar),
   premium content blocks (tables, callouts, formulas, illustrations, tool
   CTAs), and the homepage "latest guides" slider. Uses global design-system
   variables so light/dark are automatic. Illustrations are static SVG.
   ========================================================================== */

/* --- Two-column layout ---------------------------------------------------- */
.blog-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 2.5rem;
    max-width: 1080px;
    margin: 0 auto 3.5rem;
    align-items: start;
}
.blog-main { min-width: 0; }
.blog-sidebar {
    position: sticky;
    top: calc(var(--header-height) + 1.5rem);
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}
@media (max-width: 900px) {
    .blog-layout { grid-template-columns: 1fr; gap: 1.5rem; }
    .blog-sidebar { position: static; }
}

/* --- Post header ---------------------------------------------------------- */
.blog-eyebrow {
    display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center;
    font-size: 0.78rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em;
    color: var(--color-primary); margin-bottom: 0.9rem;
}
.blog-eyebrow .sep { color: var(--color-border); }
.blog-eyebrow .muted { color: var(--color-text-light); font-weight: 500; text-transform: none; letter-spacing: 0; }
.blog-title { font-size: clamp(1.7rem, 4vw, 2.4rem); line-height: 1.15; margin: 0 0 0.9rem; color: var(--color-secondary); }
.blog-lede { font-size: 1.12rem; line-height: 1.6; color: var(--color-text-muted); margin: 0 0 1.25rem; }
.blog-byline {
    display: flex; align-items: center; flex-wrap: wrap; gap: 0.5rem 0.85rem;
    font-size: 0.86rem; color: var(--color-text-muted);
    border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border);
    padding: 0.7rem 0; margin-bottom: 1.75rem;
}
.blog-byline .blog-meta-chip { display: inline-flex; align-items: center; gap: 0.3rem; }

/* --- Hero illustration ---------------------------------------------------- */
.blog-hero-art {
    margin: 0 0 2rem;
    border-radius: 16px;
    overflow: hidden;
    background: var(--color-primary-light);
    border: 1px solid var(--color-border);
}
.blog-hero-art .blog-illustration,
.blog-figure .blog-illustration { display: block; width: 100%; height: auto; }

/* --- Article body typography --------------------------------------------- */
.blog-body { font-size: 1.02rem; line-height: 1.75; color: var(--color-text-main); }
.blog-body > p { margin: 0 0 1.25rem; }
.blog-body h2 {
    font-size: 1.5rem; line-height: 1.25; color: var(--color-secondary);
    margin: 2.5rem 0 1rem; padding-top: 0.5rem; scroll-margin-top: 1.5rem;
}
.blog-body h3 { font-size: 1.18rem; color: var(--color-secondary); margin: 1.75rem 0 0.75rem; }
.blog-body ul, .blog-body ol { margin: 0 0 1.25rem; padding-left: 1.35rem; }
.blog-body li { margin-bottom: 0.5rem; }
.blog-body strong { color: var(--color-secondary); font-weight: 700; }

/* Inline links inside prose — obvious but tasteful */
.blog-body p a, .blog-body li a {
    color: var(--color-primary);
    font-weight: 600;
    text-decoration: underline;
    text-decoration-color: color-mix(in srgb, var(--color-primary) 35%, transparent);
    text-underline-offset: 2px;
    transition: text-decoration-color var(--transition-fast, 0.15s);
}
.blog-body p a:hover, .blog-body li a:hover { text-decoration-color: var(--color-primary); }

/* --- Premium tables ------------------------------------------------------- */
.blog-body table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin: 1.75rem 0;
    font-size: 0.92rem;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    overflow: hidden;
}
.blog-body thead th {
    background: var(--color-bg-base);
    color: var(--color-secondary);
    font-weight: 700;
    text-align: left;
    padding: 0.8rem 1rem;
    border-bottom: 1px solid var(--color-border);
    white-space: nowrap;
}
.blog-body tbody td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text-muted);
}
.blog-body tbody tr:last-child td { border-bottom: none; }
.blog-body tbody tr:nth-child(even) td { background: color-mix(in srgb, var(--color-bg-base) 55%, transparent); }
.blog-body tbody tr:hover td { background: var(--color-primary-light); }
/* numeric columns (2nd onward) read better right-aligned */
.blog-body tbody td:not(:first-child),
.blog-body thead th:not(:first-child) { text-align: right; font-variant-numeric: tabular-nums; }
.blog-body tbody td:first-child { color: var(--color-secondary); font-weight: 600; }
.blog-table-wrap { overflow-x: auto; }

/* --- Formula card --------------------------------------------------------- */
.blog-body .math-formula {
    background: var(--color-bg-base);
    border: 1px solid var(--color-border);
    border-left: 4px solid var(--color-primary);
    border-radius: 10px;
    padding: 1rem 1.25rem;
    margin: 1.5rem 0;
    font-family: ui-monospace, "SF Mono", Menlo, monospace;
    font-size: 0.95rem;
    color: var(--color-secondary);
    overflow-x: auto;
}

/* --- Callout box ---------------------------------------------------------- */
.blog-callout {
    display: flex;
    gap: 0.85rem;
    margin: 1.75rem 0;
    padding: 1.1rem 1.25rem;
    border-radius: 12px;
    background: var(--color-primary-light);
    border: 1px solid color-mix(in srgb, var(--color-primary) 22%, var(--color-border));
}
.blog-callout .blog-callout-icon {
    flex: 0 0 auto; color: var(--color-primary); margin-top: 0.1rem;
}
.blog-callout .blog-callout-icon svg { width: 22px; height: 22px; }
.blog-callout-body { font-size: 0.95rem; line-height: 1.6; color: var(--color-text-main); }
.blog-callout-body strong { color: var(--color-secondary); }
.blog-callout-body p { margin: 0; }

/* --- In-body figures ------------------------------------------------------ */
.blog-figure {
    margin: 2rem 0;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--color-border);
    background: var(--color-bg-card);
}

/* --- Inline "try this calculator" CTA card -------------------------------- */
.blog-tool-cta {
    display: flex; align-items: center; gap: 1rem;
    margin: 2rem 0; padding: 1.1rem 1.25rem;
    border-radius: 12px; border: 1px solid var(--color-border);
    background: var(--color-bg-card); border-left: 4px solid var(--color-primary);
    box-shadow: 0 4px 14px -10px rgba(86, 53, 236, 0.4);
}
.blog-tool-cta-icon {
    flex: 0 0 auto; width: 46px; height: 46px; display: inline-flex; align-items: center; justify-content: center;
    border-radius: 11px; background: var(--color-primary-light); border: 1px solid var(--color-border); color: var(--color-primary);
}
.blog-tool-cta-icon svg { width: 22px; height: 22px; }
.blog-tool-cta-body { display: flex; flex-direction: column; gap: 0.15rem; flex: 1 1 auto; min-width: 0; }
.blog-tool-cta-body strong { color: var(--color-secondary); font-size: 1rem; }
.blog-tool-cta-body span { color: var(--color-text-muted); font-size: 0.86rem; line-height: 1.45; }
.blog-tool-cta-btn {
    flex: 0 0 auto; padding: 0.6rem 1.15rem; border-radius: 999px;
    background: var(--color-primary); color: #fff; font-weight: 600; font-size: 0.86rem;
    white-space: nowrap; text-decoration: none;
}
.blog-tool-cta-btn:hover { filter: brightness(1.07); }
@media (max-width: 560px) {
    .blog-tool-cta { flex-wrap: wrap; }
    .blog-tool-cta-btn { width: 100%; text-align: center; }
}

/* --- Sidebar cards -------------------------------------------------------- */
.blog-side-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 14px;
    padding: 1.1rem 1.25rem;
}
.blog-side-title {
    font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em;
    color: var(--color-text-light); margin: 0 0 0.85rem;
}
/* TOC */
.blog-toc-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 0.1rem; }
.blog-toc-list a {
    display: block; padding: 0.4rem 0.6rem; border-radius: 8px;
    font-size: 0.88rem; line-height: 1.4; color: var(--color-text-muted);
    text-decoration: none; border-left: 2px solid transparent;
}
.blog-toc-list a:hover { background: var(--color-primary-light); color: var(--color-primary); }
.blog-toc-list a.is-active { color: var(--color-primary); font-weight: 600; border-left-color: var(--color-primary); background: var(--color-primary-light); }

/* Sidebar related tools */
.blog-side-tool {
    display: flex; align-items: center; gap: 0.75rem;
    padding: 0.6rem 0; text-decoration: none;
    border-top: 1px solid var(--color-border);
}
.blog-side-tool:first-of-type { border-top: none; }
.blog-side-tool-icon {
    flex: 0 0 auto; width: 34px; height: 34px; display: inline-flex; align-items: center; justify-content: center;
    border-radius: 9px; background: var(--color-primary-light); border: 1px solid var(--color-border); color: var(--color-primary);
}
.blog-side-tool-icon svg { width: 17px; height: 17px; }
.blog-side-tool-text { display: flex; flex-direction: column; gap: 0.05rem; min-width: 0; }
.blog-side-tool-text strong { font-size: 0.88rem; color: var(--color-secondary); font-weight: 600; line-height: 1.25; }
.blog-side-tool-text span { font-size: 0.78rem; color: var(--color-text-muted); line-height: 1.35; }
.blog-side-tool:hover .blog-side-tool-text strong { color: var(--color-primary); }

/* Sidebar CTA */
.blog-side-cta { background: var(--color-primary); border-color: var(--color-primary); }
.blog-side-cta .blog-side-title { color: rgba(255,255,255,0.75); }
.blog-side-cta p { color: rgba(255,255,255,0.9); font-size: 0.88rem; line-height: 1.5; margin: 0 0 0.85rem; }
.blog-side-cta a {
    display: inline-block; background: #fff; color: var(--color-primary);
    font-weight: 700; font-size: 0.85rem; padding: 0.55rem 1.1rem; border-radius: 999px; text-decoration: none;
}

/* --- Homepage "latest guides" slider -------------------------------------- */
.home-latest { margin: 3.5rem auto 1rem; }
.home-latest-head { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; margin-bottom: 1.25rem; }
.home-latest-head h2 { margin: 0; }
.home-latest-head a { font-weight: 600; font-size: 0.9rem; white-space: nowrap; }
.home-latest-track {
    display: grid; grid-auto-flow: column; grid-auto-columns: minmax(280px, 1fr);
    gap: 1.25rem; overflow-x: auto; scroll-snap-type: x mandatory; padding-bottom: 0.75rem; 
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE/Edge */
}
.home-latest-track::-webkit-scrollbar {
    display: none; /* Chrome, Safari, Opera */
}
.home-latest-card { scroll-snap-align: start; display: flex; flex-direction: column; overflow: hidden; padding: 0; text-decoration: none; }
.home-latest-thumb { border-bottom: 1px solid var(--color-border); background: var(--color-primary-light); }
.home-latest-thumb .blog-illustration { display: block; width: 100%; height: auto; }
.home-latest-thumb--plain { height: 150px; background: var(--color-primary); opacity: 0.9; }
.home-latest-body { padding: 1.1rem 1.25rem 1.25rem; display: flex; flex-direction: column; gap: 0.5rem; }
.home-latest-eyebrow { font-size: 0.7rem; font-weight: 700; letter-spacing: 0.05em; text-transform: uppercase; color: var(--color-primary); display: flex; gap: 0.4rem; align-items: center; }
.home-latest-eyebrow span { color: var(--color-text-light); font-weight: 500; }
.home-latest-card h3 { font-size: 1.05rem; line-height: 1.35; margin: 0; color: var(--color-secondary); }
.home-latest-card p { font-size: 0.85rem; color: var(--color-text-muted); line-height: 1.55; margin: 0; }
.home-latest-more { margin-top: auto; font-weight: 600; font-size: 0.85rem; color: var(--color-primary); }

/* --- Blog index card thumbnail ------------------------------------------- */
.blog-index-thumb { background: var(--color-primary-light); border-bottom: 1px solid var(--color-border); }
.blog-index-thumb .blog-illustration { display: block; width: 100%; height: auto; }

/* Clickable card title styling */
.blog-card-title-link {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

.blog-card-title-link:hover,
.card-hover:hover .blog-card-title-link {
    color: var(--color-primary);
}

/* Slider navigation arrows */
.home-latest-arrows {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}
.home-latest-arrow {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 1px solid var(--color-border);
    background: var(--color-bg-card);
    color: var(--color-text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
    padding: 0;
}
.home-latest-arrow:hover {
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-color: var(--color-primary);
}
.home-latest-arrow svg {
    width: 16px;
    height: 16px;
}