/* Blog list + post enhancements — ClaudeN AI. Uses tokens.css variables. */

/* ---------- Reading progress bar ---------- */
.reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    z-index: 60;
    background: transparent;
    pointer-events: none;
}
.reading-progress__bar {
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, var(--primary), var(--brand-cyan));
    transform-origin: left center;
    transition: width 0.08s linear;
}

.blog-topics {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
    margin: 20px auto 0;
}
.blog-topics a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 38px;
    padding: 8px 14px;
    border-radius: var(--radius-pill);
    border: 1px solid var(--border);
    background: var(--card);
    color: var(--muted-foreground);
    font-weight: 650;
    font-size: 0.9rem;
    transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease), transform 0.18s var(--ease);
}
.blog-topics a:hover {
    color: var(--primary);
    border-color: color-mix(in srgb, var(--primary) 38%, var(--border));
    background: color-mix(in srgb, var(--primary) 7%, var(--card));
    transform: translateY(-1px);
}

/* ---------- Blog list grid + cards ---------- */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: clamp(18px, 3vw, 28px);
}
.blog-card {
    display: flex;
    flex-direction: column;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), border-color 0.25s var(--ease);
}
.blog-card:hover {
    transform: translateY(-4px);
    border-color: color-mix(in srgb, var(--primary) 40%, var(--border));
    box-shadow: var(--shadow-lg);
}
.blog-card__media {
    display: block;
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: var(--surface-warm);
}
.blog-card__media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s var(--ease);
}
.blog-card:hover .blog-card__media img { transform: scale(1.04); }
.blog-card__body {
    padding: 20px 22px 24px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    flex: 1;
}
.blog-card__meta {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}
.blog-card__date {
    color: var(--muted-foreground);
    font-size: 0.82rem;
    font-family: var(--font-mono);
}
.blog-card__readtime {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 0.78rem;
    font-family: var(--font-mono);
    color: var(--muted-foreground);
    padding: 2px 9px;
    border-radius: var(--radius-pill);
    background: var(--surface-warm-2);
}
.blog-card__title { margin: 0; font-size: 1.25rem; line-height: 1.3; }
.blog-card__title a { color: var(--foreground); }
.blog-card__title a:hover { color: var(--primary); }
.blog-card__excerpt { color: var(--muted-foreground); margin: 0; font-size: 0.96rem; flex: 1; }
.blog-card__more {
    font-weight: 600;
    font-size: 0.92rem;
    margin-top: 4px;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}
.blog-card__more .arrow { transition: transform 0.2s var(--ease); }
.blog-card:hover .blog-card__more .arrow { transform: translateX(4px); }

/* ---------- Post layout shell ---------- */
.post__shell {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: clamp(28px, 4vw, 48px);
}
@media (min-width: 1080px) {
    .post__shell {
        grid-template-columns: minmax(0, 1fr) 240px;
        align-items: start;
    }
}

/* ---------- Post meta enhancements ---------- */
.post__meta {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    color: var(--muted-foreground);
    font-size: 0.9rem;
}
.post__meta .dot { opacity: 0.5; }
.post__readtime {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-family: var(--font-mono);
    font-size: 0.82rem;
}

/* ---------- Post body typography ---------- */
.post__body {
    font-size: 1.075rem;
    line-height: 1.78;
}
.post__body > * { scroll-margin-top: 90px; }
.post__body h2 {
    font-family: var(--font-serif);
    margin: 1.7em 0 0.5em;
    font-size: clamp(1.4rem, 3vw, 1.7rem);
    line-height: 1.25;
}
.post__body h3 {
    font-family: var(--font-serif);
    margin: 1.4em 0 0.4em;
    font-size: 1.22rem;
}
.post__body h2 .anchor,
.post__body h3 .anchor {
    opacity: 0;
    margin-left: 0.35em;
    color: var(--muted-foreground);
    font-weight: 400;
    text-decoration: none;
    transition: opacity 0.15s var(--ease), color 0.15s var(--ease);
}
.post__body h2:hover .anchor,
.post__body h3:hover .anchor { opacity: 1; }
.post__body h2 .anchor:hover,
.post__body h3 .anchor:hover { color: var(--primary); }
.post__body p { margin: 0 0 1.15em; }
.post__body a { color: var(--primary); text-decoration: underline; text-underline-offset: 0.18em; text-decoration-thickness: 1px; }
.post__body a:hover { color: var(--primary-hover); }
.post__body ul, .post__body ol { margin: 0 0 1.2em; padding-left: 1.4em; }
.post__body li { margin-bottom: 0.45em; }
.post__body strong { color: var(--foreground); }
.post__body blockquote {
    margin: 1.4em 0;
    padding: 0.4em 1.2em;
    border-left: 3px solid var(--primary);
    color: var(--muted-foreground);
    background: var(--surface-warm);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.post__body pre {
    background: var(--surface-warm);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 16px 18px;
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    margin: 0 0 1.3em;
}
.post__body code {
    background: color-mix(in srgb, var(--primary) 8%, var(--surface-warm));
    padding: 0.12em 0.4em;
    border-radius: var(--radius-xs);
    font-family: var(--font-mono);
    font-size: 0.88em;
}
.post__body pre code { background: none; padding: 0; }

/* ---------- Table of contents ---------- */
.post__toc {
    position: sticky;
    top: 88px;
    align-self: start;
    font-size: 0.9rem;
}
.post__toc-inner {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--card);
    padding: 18px 18px 20px;
    box-shadow: var(--shadow-sm);
}
.post__toc-title {
    margin: 0 0 12px;
    font-size: 0.72rem;
    letter-spacing: var(--tracking-kicker);
    text-transform: uppercase;
    color: var(--muted-foreground);
    font-weight: 700;
}
.post__toc ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 2px; }
.post__toc li.is-sub { padding-left: 14px; }
.post__toc a {
    display: block;
    padding: 5px 10px;
    border-radius: var(--radius-xs);
    color: var(--muted-foreground);
    line-height: 1.4;
    border-left: 2px solid transparent;
    transition: color 0.15s var(--ease), background 0.15s var(--ease), border-color 0.15s var(--ease);
}
.post__toc a:hover { color: var(--foreground); background: var(--surface-warm); }
.post__toc a.is-active {
    color: var(--primary);
    border-left-color: var(--primary);
    background: color-mix(in srgb, var(--primary) 7%, transparent);
    font-weight: 600;
}
@media (max-width: 1079px) {
    .post__toc { position: static; top: auto; }
    .post__toc-inner { padding: 14px 16px 16px; }
}

/* ---------- Share buttons ---------- */
.post__share {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    margin: 36px 0 8px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}
.post__share-label {
    font-size: 0.82rem;
    color: var(--muted-foreground);
    font-weight: 600;
    margin-right: 2px;
}
.share-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-pill);
    border: 1px solid var(--border);
    background: var(--card);
    color: var(--muted-foreground);
    cursor: pointer;
    transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease), transform 0.18s var(--ease);
}
.share-btn:hover {
    color: var(--primary);
    border-color: color-mix(in srgb, var(--primary) 45%, var(--border));
    transform: translateY(-2px);
}
.share-btn svg { width: 18px; height: 18px; }
.share-btn--copy.is-copied {
    color: var(--success);
    border-color: color-mix(in srgb, var(--success) 50%, var(--border));
}

/* ---------- Related posts ---------- */
.related {
    margin-top: clamp(40px, 6vw, 64px);
    padding-top: clamp(28px, 4vw, 40px);
    border-top: 1px solid var(--border);
}
.related__title {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    margin: 0 0 20px;
}
.related__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 18px;
}
.related__card {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 18px 18px 20px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--card);
    box-shadow: var(--shadow-sm);
    transition: transform 0.22s var(--ease), border-color 0.22s var(--ease), box-shadow 0.22s var(--ease);
}
.related__card:hover {
    transform: translateY(-3px);
    border-color: color-mix(in srgb, var(--primary) 40%, var(--border));
    box-shadow: var(--shadow-md);
}
.related__date { font-family: var(--font-mono); font-size: 0.78rem; color: var(--muted-foreground); }
.related__card-title { margin: 0; font-size: 1.05rem; line-height: 1.35; }
.related__card-title a { color: var(--foreground); }
.related__card-title a:hover { color: var(--primary); }
.related__excerpt { margin: 0; font-size: 0.9rem; color: var(--muted-foreground); }