body {
    font-family: 'Segoe UI', Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: url('../img/fondo_lagunaverde.jpg') no-repeat center center fixed;
    background-size: cover;
    height: 100vh;
    display: flex;
    justify-content: center; /* centra horizontal */
    align-items: center;     /* centra vertical */
}

.overlay {
    background: rgba(0, 0, 0, 0.5);
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.login-box {
    width: 350px;
    padding: 30px;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 6px 20px rgba(0,0,0,0.3);
    text-align: center;
}

.login-box img {
    display: block;
    margin: 0 auto 20px auto;
    width: 100px;
}

.login-box h2 {
    margin-bottom: 20px;
    color: #8da22b; /* color corporativo */
}

.login-box input {
    width: 90%;
    padding: 12px;
    margin: 10px auto;
    border: 1px solid #ccc;
    border-radius: 6px;
    display: block;
}

.login-box button {
    width: 90%;
    padding: 12px;
    background: #8da22b; /* color corporativo */
    color: #fff;
    border: none;
    border-radius: 6px;
    font-weight: bold;
    cursor: pointer;
    margin: 15px auto 0 auto;
    display: block;
}

.login-box button:hover {
    background: #7b911f; /* tono más oscuro al pasar el mouse */
}

.footer {
    margin-top: 15px;
    font-size: 12px;
    color: #555;
}

.error {
    color: red;
    margin-bottom: 15px;
}