/* Ôn lại câu sai: thẻ trên trang chủ + dòng ở khu bố mẹ */
.rv-tile { display: flex; align-items: center; gap: 14px; width: 100%; margin: 16px 0; padding: 14px 18px; text-align: left; cursor: pointer;
  font-family: var(--font-b); color: var(--ink); background: linear-gradient(135deg, #e9f6ff, #f3ecff); border: 3px solid var(--sky); border-radius: 28px; box-shadow: var(--sh); transition: transform .12s; }
.rv-tile:active { transform: translateY(2px); }
.rv-ic { font-size: 40px; line-height: 1; }
.rv-tx { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 2px; }
.rv-tx b { font-family: var(--font-d); font-size: 20px; line-height: 1.25; }
.rv-tx small { color: var(--muted); font-weight: 700; font-size: 14px; }
.rv-go { font-size: 22px; color: var(--brand2-d); font-weight: 800; }
.rv-line { margin: 8px 0 0; font-size: 15px; }
@media (max-width: 520px) { .rv-tile { padding: 12px 14px; gap: 10px; } .rv-ic { font-size: 32px; } .rv-tx b { font-size: 18px; } }