* {
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

body {
    margin: 0;
    height: 100vh;
    background: url("qns-server2026.jpg") no-repeat center center fixed;
    background-size: cover;
}

.overlay {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.form-container {
    width: 350px;
    height: 400px;
    background: rgba(0, 0, 0, 0.55);
    padding: 10px;
    border-radius: 10px;
    text-align: center;
}

.form-container img {
    margin-top: 0;
    margin-bottom: 5px;
}

.form-container input,
.form-container textarea {
    width: 90%;
    padding: 5px;
    margin: 6px 0;
    border-radius: 5px;
    border: 1px solid #ccc;
}

.form-container textarea {
    height: 55px;
    resize: none;
}

.form-container button {
    margin-top: 10px;
    padding: 12px;
    width: 50%;
    border: none;
    background: #378ff3;
    color: white;
    font-size: 16px;
    cursor: pointer;
    border-radius: 5px;
}

#alerta {
    margin-top: 10px;
    padding: 10px;
    display: none;
    border-radius: 5px;
    font-weight: bold;
}

.alert-success {
    background: #b3ecff;
    color: #004466;
}

.alert-error {
    background: #ffb3b3;
    color: #660000;
}