.topic-section { margin-bottom: 2.5rem; }
.topic-section-title { margin: 0 0 0.35rem; font-size: 1.15rem; font-weight: 700; color: var(--text); }
.topic-section-desc { margin: 0 0 1.25rem; color: var(--text-muted); font-size: 0.92rem; max-width: 70ch; }
.topic-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 1.25rem; }
.topic-card { display: flex; flex-direction: column; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); box-shadow: var(--shadow); padding: 1.25rem; color: var(--text); text-decoration: none; transition: transform 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease; }
.topic-card:hover { transform: translateY(-3px); border-color: var(--primary); }
.topic-card-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 0.75rem; margin-bottom: 0.75rem; }
.topic-card-icon { font-size: 1.8rem; line-height: 1; }
.topic-card-badge { flex-shrink: 0; padding: 0.2rem 0.6rem; border-radius: 999px; background: var(--primary-soft); color: var(--primary); font-size: 0.68rem; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; white-space: nowrap; }
.topic-card-title { margin: 0 0 0.4rem; font-size: 1.05rem; font-weight: 700; color: var(--text); }
.topic-card-desc { margin: 0; flex-grow: 1; color: var(--text-muted); font-size: 0.88rem; line-height: 1.55; }
.topic-card-cta { display: inline-flex; align-items: center; gap: 0.35rem; margin-top: 1rem; color: var(--primary); font-size: 0.85rem; font-weight: 700; }
.topic-card:hover .topic-card-cta { text-decoration: underline; }