.dv-wrap { max-width: 560px; margin: 1.5rem auto; padding: 1rem; background:#fff; border:1px solid #e5e7eb; border-radius:12px; }
.dv-form { display: grid; gap: 12px; }
.dv-field label { font-weight: 600; display:block; margin-bottom: 6px; }
.dv-field input { width: 100%; padding: 10px 12px; border:1px solid #d1d5db; border-radius:8px; }
.dv-btn { display:inline-block; padding: 10px 16px; border:0; border-radius:8px; background:#111827; color:#fff; cursor:pointer; }
.dv-btn:hover { opacity:.92; }
.dv-result { margin-top: 12px; font-weight: 700; }
.dv-ok { color: #059669; }
.dv-bad { color: #dc2626; }