body {
    background-color: #f8f9fa;
    font-family: Arial, sans-serif;
    overflow-x: hidden;
    padding-top: 50px;
}
.title-container {
    max-width: 95%;
    margin: 0 auto;
    text-align: center;
    margin-bottom: 30px;
}
h1 {
    font-size: 1.5rem;
}
.container {
    max-width: 600px;
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.1);
    animation: fadeIn 0.5s ease;
}
.result {
    margin-top: 20px;
    display: none;
    opacity: 0;
    transition: opacity 0.5s ease;
}
.result.show {
    display: block;
    opacity: 1;
}
.loading {
    font-weight: bold;
    color: black;
    display: none;
    animation: fadeIn 0.5s ease;
    margin-top: 10px;
    font-size: 0.9rem;
}
.loading i {
    margin-right: 5px;
}
.alert-message {
    display: none;
    margin-top: 20px;
    color: red;
}
.alert-message i {
    margin-right: 5px;
}
#submitBtn {
    outline: none;
}
#submitBtn:focus {
    outline: none;
}
.device-info-line {
    opacity: 0;
    transition: opacity 0.5s ease;
}
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
@keyframes fadeOut {
    from { opacity: 1; }
    to { opacity: 0; }
}
@media (max-width: 576px) {
    .title-container {
        max-width: 95%;
    }
    .container {
        max-width: 95%;
        padding: 15px;
    }
    h1 {
        font-size: 1.2rem;
    }
}
.copyright {
    text-align: center;
    margin-top: 30px;
    font-size: 0.8rem;
    color: #6c757d;
    padding: 10px 0;
}
.title-container i {
    font-size: 1.8rem;
    vertical-align: middle;
}