/* Fondo moderno */
body {
    background: linear-gradient(135deg, #1e3c72, #2a5298);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* Caja central */
.login-container {
    max-width: 400px;
    margin: 80px auto;
    padding: 40px;
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.2);
    text-align: center;
}

/* Logo */
.login-container .logo {
    display: block;
    margin: 0 auto 20px;
    width: 150px;
}

/* Inputs */
.login-container input[type="text"],
.login-container input[type="password"] {
    width: 100%;
    padding: 12px 15px;
    margin-bottom: 15px;
    border: 1px solid #ccc;
    border-radius: 8px;
    font-size: 16px;
}

/* Botón login */
.login-container button {
    width: 100%;
    padding: 12px;
    background-color: #1e3c72;
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 18px;
    cursor: pointer;
}

.login-container button:hover {
    background-color: #2a5298;
}

/* Mensajes de error */
.error-message {
    color: #ff4d4f;
    margin-bottom: 10px;
    font-weight: bold;
}