:root{
  /* Paleta da marca DataView: gradiente azul royal -> índigo escuro. */
  --brand:#1d4ed8;
  --brand-dark:#0a1f8f;
  --bg:#f3f4f6;
  --card:#ffffff;
  --accent:#1d4ed8;
  --muted:#6b7280;
  --border:#e5e7eb;
}
*{box-sizing:border-box}
body{
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,"Helvetica Neue",Arial;
  background:var(--bg);
  margin:0;
  color:#111827;
  min-height:100vh;
  display:flex;
  flex-direction:column;
}
.container{
  width:100%;
  max-width:680px;
  margin:48px auto;
  padding:32px;
  background:var(--card);
  border-radius:12px;
  box-shadow:0 6px 24px rgba(15,23,42,.08);
}
/* Faixa superior no gradiente da marca. */
.container::before{
  content:"";
  display:block;
  height:4px;
  margin:-32px -32px 24px;
  border-radius:12px 12px 0 0;
  background:linear-gradient(90deg,var(--brand) 0%,var(--brand-dark) 100%);
}
h1{font-size:20px;margin:0 0 12px;font-weight:600}
.label{display:block;margin-top:16px;margin-bottom:6px;color:var(--muted);font-size:13px;font-weight:500}
.input{
  width:100%;
  padding:10px 12px;
  border:1px solid var(--border);
  border-radius:6px;
  font-size:14px;
  transition:border-color .15s,box-shadow .15s;
}
.input:focus{
  outline:none;
  border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(29,78,216,.12);
}
.actions{margin-top:20px;text-align:right}
.btn{
  display:inline-block;
  background:var(--accent);
  color:#fff;
  padding:10px 18px;
  border-radius:6px;
  border:none;
  cursor:pointer;
  font-size:14px;
  font-weight:500;
  text-decoration:none;
  transition:filter .15s;
}
.btn:hover{filter:brightness(.92)}
.btn:disabled,
.btn[disabled]{
  background:#9ca3af;
  cursor:not-allowed;
  filter:none;
}
.result{margin:12px 0;padding:12px;border-radius:6px;font-size:14px}
.result.ok{background:#ecfdf5;color:#065f46}
.result.err{background:#fff1f2;color:#9f1239}
.note{margin-top:16px;color:var(--muted);font-size:13px;line-height:1.5}
/* Observação curta logo abaixo de um campo (ex.: formatos aceitos). */
.hint{margin:6px 0 0;color:var(--muted);font-size:12px}

/* Cabeçalho com a logo da marca. */
.brand-inline{display:flex;align-items:center;gap:14px;margin-bottom:16px}
.brand-inline img{height:40px;width:auto}
.brand-inline h1{margin:0}

/* Blocos de dados do resultado da validação. */
.dados{margin-top:16px}
.dados dt{color:var(--muted);font-size:12px;font-weight:500;text-transform:uppercase;letter-spacing:.03em;margin-top:14px}
.dados dd{margin:4px 0 0;font-size:14px;color:#111827}

/* Rodapé com os links públicos obrigatórios. */
.page-footer{
  margin-top:auto;
  padding:24px;
  text-align:center;
  font-size:12px;
  color:var(--muted);
}
.page-footer a{color:var(--muted);text-decoration:underline}
.page-footer a:hover{color:var(--brand)}

@media (max-width:640px){
  .container{margin:16px;padding:24px}
  .container::before{margin:-24px -24px 20px}
  .brand-inline img{height:32px}
}