/* ═══════════════════════════════════════════════════════
   TEACHER PORTAL — announcements.css
   Announcements section styles.
   Uses form-card + data-table from common.css.
   ═══════════════════════════════════════════════════════ */

/* Announcements form and listing uses shared form-card,
   table-card, and data-table styles from common.css.
   No additional teacher-specific announcement styles required. */