* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #0f1e33;
  font: 15px system-ui, sans-serif;
  color: #0f1e33;
}
.caixa {
  background: #fff;
  border-radius: 14px;
  padding: 32px 28px;
  width: 100%;
  max-width: 340px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.25);
}
.caixa h1 { margin: 0; font-size: 22px; }
.legenda { margin: 2px 0 20px; color: #6b7686; }
form { display: flex; flex-direction: column; gap: 14px; }
label { display: flex; flex-direction: column; gap: 6px; font-weight: 500; }
input {
  padding: 10px 12px;
  border: 1px solid #d6dbe3;
  border-radius: 8px;
  font-size: 15px;
}
button {
  margin-top: 6px;
  padding: 11px;
  border: none;
  border-radius: 8px;
  background: #0f1e33;
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}
button:hover { background: #18304f; }
.erro { color: #b3261e; margin: 14px 0 0; font-size: 13px; }