body {
    background: #f4f6f9;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.card {
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 450px;
    text-align: center;
    overflow: hidden;
    margin-bottom: 0;
}

.scanner-area {
    background: #fff;
    padding: 20px;
    border-radius: 10px;
    margin: 20px 0;
    border: 2px dashed #dee2e6;
}

.status-text { font-weight: bold; color: #6c757d; }
.hidden { display: none !important; }

.header-bg {
    background-color: #0d6efd;
    color: white;
    padding: 20px;
    margin-bottom: 20px;
}

.divider {
    display: flex;
    align-items: center;
    text-align: center;
    margin: 20px 0;
    color: #ccc;
}
.divider::before, .divider::after { content: ''; flex: 1; border-bottom: 1px solid #ddd; }
.divider:not(:empty)::before { margin-right: .25em; }
.divider:not(:empty)::after { margin-left: .25em; }