* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f3f4f6;
  color: #1f2937;
}

.container {
  max-width: 520px;
  margin: 40px auto;
  padding: 24px;
  background: #ffffff;
  border-radius: 12px;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
}

h1 {
  margin-top: 0;
  margin-bottom: 8px;
}

p {
  margin-top: 0;
  margin-bottom: 20px;
}

.field {
  margin-bottom: 14px;
}

label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
}

input,
textarea {
  width: 100%;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  padding: 10px;
  font-size: 15px;
}

input:focus,
textarea:focus {
  border-color: #2563eb;
  outline: none;
}

button {
  width: 100%;
  border: none;
  border-radius: 8px;
  padding: 12px;
  background: #2563eb;
  color: white;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
}

button:hover {
  background: #1d4ed8;
}

.error {
  color: #dc2626;
  font-size: 13px;
  min-height: 16px;
  display: block;
  margin-top: 4px;
}

.resultado {
  margin-top: 12px;
  font-weight: 600;
}

.resultado.ok {
  color: #15803d;
}

.resultado.fail {
  color: #dc2626;
}