body {
    margin: 10;
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(to right, #003366, #0073e6);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    color: #333;
}

.branding {
    text-align: center;
    margin-bottom: 30px;
}

.branding h1 {
    color: white;
    font-size: 32px;
    margin: 10px 0 0;
}

.login-container {
    background: white;
    padding: 35px 30px;
    border-radius: 12px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.2);
    width: 360px;
    text-align: center;
}

.login-container p {
    margin-bottom: 25px;
    color: #666;
}

.login-container input[type="email"],
.login-container input[type="password"] {
    width: 100%;
    padding: 12px;
    margin-bottom: 15px;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 14px;
}

.login-container button {
    background: #004080;
    color: white;
    padding: 12px 20px;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    cursor: pointer;
    width: 100%;
}

.login-container button:hover {
    background: #0066cc;
}

.error {
    color: red;
    margin-bottom: 15px;
}
.btn-return-home {
    display: inline-block; /* O block si quieres que ocupe todo el ancho */
    margin-top: 20px;      /* Espacio arriba del botón */
    padding: 10px 20px;
    background-color: #7f8c8d; /* Un color neutro, gris */
    color: white;
    text-decoration: none;
    border-radius: 6px;
    font-size: 0.95em;
    transition: background-color 0.3s ease;
}
.btn-return-home:hover {
    background-color: #6c7a7b;
}

/* 3 — logo circular y centrado */
.logo{
  width:160px;height:160px;
  border-radius:50%;
  object-fit:cover;
  border:4px solid var(--azul);
  display:block;
  margin:0 auto 20px;   /* centrado + margen inferior */
}

h1{
  font-size:22px;
  text-align:center;
  margin-bottom:25px;
  color:var(--azul);
}

@media (max-height:650px){
  body{
      justify-content:center;   /* centra verticalmente */
      padding-top:20px;         /* margen superior mucho menor */
  }
}
/* Responsive: logo se reduce en móviles */
@media(max-width:480px){
  .logo{width:120px;height:120px}
  .branding h1{font-size:20px}
  .sub-ar{font-size:16px}
}