/* Reset básico */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Segoe UI", sans-serif;
  background: #f1f4f9;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
}

/* Contenedor padre centrado */
.form-container {
    max-width: 400px;
    margin: 100px auto;
    padding: 2rem;
    background: white;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    text-align: center;
}

.form-container input,
.form-container button {
    width: 100%;
    padding: 12px;
    margin-top: 10px;
    border-radius: 5px;
    border: 1px solid #ccc;
}

.form-container button {
    background-color: #3498db;
    color: white;
    border: none;
}

.error {
    color: red;
    margin-bottom: 10px;
}

/* Formulario completo */
form {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 15px;
}

input[type="text"],
input[type="email"],
input[type="password"] {
  padding: 15px 18px; /* más alto y ancho */
  font-size: 17px;     /* más grande */
  border-radius:4px;
}

button {
  padding: 15px;
  font-size: 17px;
}


input:focus {
  border-color: #4a90e2;
  outline: none;
}

/* Botón */
button {
  background-color: #4a90e2;
  color: white;
  padding: 12px;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

button:hover {
  background-color: #357ac9;
}

/* Mensaje */
#mensaje {
  text-align: center;
  font-size: 14px;
  margin-top: 10px;
  color: #d9534f;
}

/* Responsive para pantallas pequeñas */
@media (max-width: 500px) {
  .form-container {
    padding: 25px 15px;
  }

  input,
  button {
    font-size: 14px;
  }
}