/* vietnamese — màn học tiếng Việt: prompt to + nút lựa chọn lớn dễ chạm. */

.viet-area {
  max-width: 720px;
  margin: 0 auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 22px;
  width: 100%;
}

.viet-prompt-row {
  display: flex;
  align-items: center;
  gap: 14px;
}
.viet-prompt {
  min-height: 96px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.viet-prompt__hear { font-size: 3.2rem; }
.viet-prompt__hint { font-size: 1rem; color: var(--c-ink-soft); margin-top: 4px; }
.viet-prompt__word {
  font-size: 3.4rem;
  font-weight: 800;
  color: var(--c-primary);
  letter-spacing: 1px;
}
.viet-prompt__emoji { font-size: 4.4rem; }

.viet-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(92px, 1fr));
  gap: 14px;
  width: 100%;
  max-width: 520px;
}
.viet-option {
  min-height: 92px;
  border: 3px solid #dbe3f0;
  border-radius: var(--radius-lg);
  background: var(--c-surface);
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: transform 0.12s ease, border-color 0.12s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}
.viet-option:hover { transform: translateY(-3px); border-color: var(--c-primary); }
.viet-option:active { transform: scale(0.96); }
.viet-option__label { font-size: 2.6rem; font-weight: 700; }

body.a11y-large .viet-option__label { font-size: 3.1rem; }
body.a11y-contrast .viet-option { border-color: #000; }