.pc-bs-grid { align-items: stretch; }
.pc-bs-card { display: flex; flex-direction: column; height: 100%; }
.pc-bs-title { min-height: 2.7em; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.pc-bs-sub { flex: 1 0 auto; }
.pc-bs-btn { margin-top: auto; transition: background-color .18s ease, color .18s ease, border-color .18s ease; }
.pc-bs-btn:hover { background: #111111; color: #ffffff; border-color: #111111; }
.pc-problem-grid.pc-bs-grid-align { align-items: stretch; }