/* ==========================================================
   TAPPITRACK — BLOG INDEX AND ARTICLES
   Markup: resources/blog.html, resources/blog/*.html
   (generated by scripts/site/blog.py)
   Script: assets/js/pages/blog.js (topic filter)
   Builds on components/page.css. Class prefixes: blog-, art-
   ========================================================== */

/* ---------- Index ---------- */

.blog-main {
    padding-block: 40px clamp(64px, 8vw, 104px);
}

.blog-filter {
    display: flex;
    gap: 8px;
    margin-bottom: 40px;
    padding-bottom: 4px;
    overflow-x: auto;
    scrollbar-width: none;
}

.blog-filter::-webkit-scrollbar {
    display: none;
}

.blog-filter button {
    flex: 0 0 auto;
    min-height: 40px;
    padding: 0 16px;
    color: var(--tt-text);
    background: var(--tt-white);
    border: 1px solid var(--tt-border);
    border-radius: 999px;
    font-size: 14px;
    font-weight: 600;
    white-space: nowrap;
    cursor: pointer;
    transition: background-color 160ms ease, border-color 160ms ease, color 160ms ease;
}

.blog-filter button:hover {
    color: var(--tt-blue);
    border-color: var(--tt-blue);
}

.blog-filter button[aria-pressed="true"] {
    color: var(--tt-white);
    background: var(--tt-blue);
    border-color: var(--tt-blue);
}

.blog-featured {
    display: grid;
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    gap: clamp(24px, 4vw, 48px);
    margin-bottom: clamp(48px, 6vw, 72px);
}

.blog-featured .blog-card {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
}

.blog-featured .blog-card-media img {
    height: 100%;
    min-height: 320px;
    aspect-ratio: auto;
}

.blog-featured .blog-card h2 {
    font-size: clamp(24px, 2.4vw, 32px);
}

.blog-topics h2 {
    margin: 0 0 8px;
    font-size: 20px;
}

.blog-topics ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

.blog-topics li {
    border-bottom: 1px solid var(--tt-border);
}

.blog-topics a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 16px 0;
    color: var(--tt-dark);
    font-weight: 600;
    text-decoration: none;
}

.blog-topics a:hover {
    color: var(--tt-blue);
}

.blog-topics svg {
    width: 18px;
    height: 18px;
    fill: none;
    stroke: var(--tt-blue);
    stroke-width: 2;
}

.blog-latest-title {
    margin: 0 0 24px;
    font-size: clamp(24px, 2.4vw, 30px);
}

/* ---------- Cards ---------- */

.blog-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.blog-grid > li[hidden] {
    display: none;
}

.blog-card {
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
    background: var(--tt-white);
    border: 1px solid var(--tt-border);
    border-radius: var(--tt-radius);
    transition: border-color 200ms ease, box-shadow 200ms ease;
}

.blog-card:hover {
    border-color: var(--tt-blue);
    box-shadow: var(--tt-shadow-sm);
}

.blog-card-media {
    display: block;
    overflow: hidden;
    background: var(--tt-light);
}

.blog-card-media img {
    display: block;
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    transition: transform 500ms var(--tt-ease);
}

.blog-card:hover .blog-card-media img {
    transform: scale(1.04);
}

.blog-card-body {
    display: flex;
    flex: 1 1 auto;
    flex-direction: column;
    gap: 10px;
    padding: 22px 24px 24px;
}

.blog-card-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px 14px;
    color: var(--tt-muted);
    font-size: 13px;
}

.blog-card-topic {
    color: var(--tt-blue);
    font-weight: 700;
}

.blog-card h2,
.blog-card h3 {
    margin: 0;
    font-size: 20px;
    line-height: 1.3;
}

.blog-card h2 a,
.blog-card h3 a {
    text-decoration: none;
}

.blog-card h2 a:hover,
.blog-card h3 a:hover {
    color: var(--tt-blue);
}

.blog-card p {
    margin: 0;
    color: var(--tt-muted);
    line-height: 1.65;
}

.blog-empty {
    padding: 32px;
    color: var(--tt-muted);
    text-align: center;
    background: var(--tt-light);
    border-radius: var(--tt-radius);
}

/* ---------- Article ---------- */

.art-hero {
    padding-top: clamp(40px, 6vw, 72px);
    background: linear-gradient(180deg, var(--tt-white) 0%, var(--tt-light) 100%);
}

.art-hero-inner {
    max-width: 880px;
}

.art-topic {
    display: inline-block;
    margin-bottom: 16px;
    color: var(--tt-blue);
    font-size: 14px;
    font-weight: 700;
    text-decoration: none;
}

.art-hero h1 {
    margin: 0 0 18px;
    font-size: clamp(34px, 4.2vw, 54px);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.art-meta {
    margin: 0 0 40px;
    color: var(--tt-muted);
    font-size: 14px;
}

.art-cover {
    margin-block: 0;
}

.art-cover img {
    display: block;
    width: 100%;
    aspect-ratio: 21 / 9;
    object-fit: cover;
    border-radius: var(--tt-radius-lg);
}

.art-layout {
    display: grid;
    grid-template-columns: 260px minmax(0, 760px);
    justify-content: center;
    gap: clamp(32px, 6vw, 80px);
    padding-block: clamp(48px, 6vw, 80px);
}

.art-toc {
    position: sticky;
    top: calc(var(--tt-header-height) + 24px);
}

.art-toc strong {
    display: block;
    margin-bottom: 12px;
    color: var(--tt-dark);
    font-size: 14px;
}

.art-toc ol {
    margin: 0;
    padding: 0;
    border-left: 2px solid var(--tt-border);
    list-style: none;
}

.art-toc a {
    display: block;
    margin-left: -2px;
    padding: 8px 0 8px 16px;
    color: var(--tt-muted);
    border-left: 2px solid transparent;
    font-size: 14px;
    line-height: 1.45;
    text-decoration: none;
}

.art-toc a:hover {
    color: var(--tt-blue);
    border-left-color: var(--tt-blue);
}

.art-body {
    color: var(--tt-text);
    font-size: 18px;
    line-height: 1.8;
}

.art-body h2 {
    margin: 48px 0 16px;
    font-size: clamp(24px, 2.4vw, 30px);
    scroll-margin-top: calc(var(--tt-header-height) + 24px);
}

.art-body p {
    margin: 0 0 20px;
}

.art-body ul:not(.pg-checks),
.art-body ol {
    margin: 0 0 24px;
    padding-left: 24px;
}

.art-body li {
    margin-bottom: 10px;
}

.art-body li::marker {
    color: var(--tt-blue);
}

.art-takeaways {
    padding: 24px 28px;
    background: var(--tt-blue-soft);
    border-radius: var(--tt-radius);
    font-size: 16px;
    line-height: 1.6;
}

.art-takeaways strong {
    display: block;
    margin-bottom: 14px;
    color: var(--tt-dark);
    font-family: var(--tt-font-heading);
    font-size: 18px;
}

.art-takeaways .pg-checks li::before {
    background-color: var(--tt-white);
}

.art-cta {
    display: grid;
    gap: 20px;
    margin-top: 48px;
    padding: 28px;
    border: 1px solid var(--tt-border);
    border-top: 3px solid var(--tt-blue);
    border-radius: var(--tt-radius);
}

.art-cta strong {
    color: var(--tt-dark);
    font-family: var(--tt-font-heading);
    font-size: 20px;
}

.art-cta p {
    margin: 6px 0 0;
    color: var(--tt-muted);
    font-size: 16px;
}

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

@media (max-width: 1024px) {
    .blog-featured {
        grid-template-columns: minmax(0, 1fr);
    }

    .blog-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .art-layout {
        grid-template-columns: minmax(0, 1fr);
    }

    .art-toc {
        position: static;
    }
}

@media (max-width: 640px) {
    .blog-featured .blog-card,
    .blog-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .blog-featured .blog-card-media img {
        min-height: 0;
        aspect-ratio: 16 / 9;
    }

    .art-body {
        font-size: 17px;
    }

    .art-cover img {
        aspect-ratio: 16 / 9;
    }
}