body {
    font-family: sans-serif;
    background-color: #f4f4f9;
    display: flex;
    justify-content: center;
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 400px;
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

/* Teknik menyembunyikan input tapi tetap bisa di-fokus */
#scanner-input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
    top: 0;
    left: 0;
}

#display-result {
    font-size: 24px;
    font-weight: bold;
    color: #2c3e50;
    padding: 20px;
    background: #ecf0f1;
    text-align: center;
    border-radius: 4px;
    margin-top: 10px;
}

.flash {
    background-color: #2ecc71 !important;
    color: white !important;
    transition: 0.2s;
}

ul {
    list-style: none;
    padding: 0;
    max-height: 200px;
    overflow-y: auto;
    font-size: 14px;
}

li {
    padding: 8px;
    border-bottom: 1px solid #eee;
}