/* Knowledge base */

.kb-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: var(--gap); }
.kb-card {
    display: flex; flex-direction: column; gap: .5rem;
    background: var(--surface); border: 1px solid var(--line); border-radius: var(--r);
    padding: 1.6rem; box-shadow: var(--shadow-sm); transition: transform .2s ease, box-shadow .2s ease;
}
.kb-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.kb-card__date { font-size: .82rem; color: var(--ink-faint); font-weight: 600; letter-spacing: .03em; }
.kb-card__title { font-size: 1.2rem; margin: 0; }
.kb-card__title a { color: var(--ink); }
.kb-card__title a:hover { color: var(--blue-strong); text-decoration: none; }
.kb-card__excerpt { color: var(--ink-soft); font-size: .96rem; margin: 0; flex: 1; }
.kb-card .link-arrow { margin-top: .4rem; font-size: .95rem; }

.kb-empty { text-align: center; color: var(--ink-soft); padding: 3rem 0; }

/* Single article */
.article { padding-block: clamp(2.5rem, 5vw, 4rem); }
.article__back { margin-bottom: 1.2rem; }
.article__back a { font-weight: 600; }
.article__title { font-size: clamp(1.9rem, 4vw, 2.7rem); margin-bottom: .6rem; }
.article__meta { color: var(--ink-faint); font-size: .9rem; margin-bottom: 2rem; }
.article__body { margin-bottom: 2.5rem; }