/* Tarjetas de temas de las clases grupales (landing, bienvenida) y página de expresiones */
.topic-grid { list-style: none; margin: 0; padding: 0; display: grid; gap: 1rem; }
@media (min-width: 640px) { .topic-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 1024px) { .topic-grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
.topic-card { display: flex; flex-direction: column; overflow: hidden; border: 1px solid var(--border); border-radius: 1rem; background: var(--card); color: var(--card-foreground); box-shadow: var(--shadow-card); }
.topic-card-next { border: 2px solid var(--cta); }
.topic-img { display: block; width: 100%; aspect-ratio: 16 / 9; object-fit: cover; background: var(--muted); }
.topic-body { display: flex; flex-direction: column; gap: 0.5rem; padding: 1.1rem 1.25rem 1.3rem; }
.topic-date { margin: 0; display: flex; flex-wrap: wrap; align-items: center; gap: 0.4rem; font-size: 0.75rem; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; color: var(--primary); }
.topic-date time::first-letter { text-transform: uppercase; }
.topic-badge { display: inline-block; padding: 0.15rem 0.55rem; border-radius: 999px; background: var(--cta); color: var(--cta-foreground); letter-spacing: 0.02em; }
.topic-title { margin: 0; font-family: var(--font-display), 'Plus Jakarta Sans', sans-serif; font-size: 1.15rem; font-weight: 700; line-height: 1.3; color: var(--foreground); }
.topic-tagline, .topic-text { margin: 0; font-size: 0.875rem; line-height: 1.55; color: var(--muted-foreground); }
.topic-expr { margin: 0.25rem 0 0; padding: 0.7rem 0.85rem; border-radius: 0.75rem; background: color-mix(in oklab, var(--accent) 16%, transparent); font-size: 0.85rem; line-height: 1.5; color: var(--foreground); }
.topic-expr strong { display: block; font-family: var(--font-display), 'Plus Jakarta Sans', sans-serif; font-size: 0.95rem; }
.topic-label { margin: 0.35rem 0 0; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted-foreground); }
.topic-vocab { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.35rem; }
.topic-vocab li { padding: 0.2rem 0.6rem; border-radius: 999px; border: 1px solid var(--border); background: var(--background); font-size: 0.8rem; }
.topic-example { white-space: pre-line; font-style: italic; }
.topic-expr .topic-example { display: block; margin-top: 0.35rem; }

/* Página de expresiones */
.expr-list { list-style: none; margin: 2rem 0 0; padding: 0; display: grid; gap: 1rem; }
.expr-item { border: 1px solid var(--border); border-radius: 1rem; background: var(--card); padding: 1.25rem 1.4rem; }
.legal .expr-item h2 { margin-top: 0; }
.legal .expr-item p { margin-top: 0.5rem; }
.expr-class { font-size: 0.8rem !important; }