/* Base */
body {
    font-family: Arial, sans-serif;
    background: #eef2f7;
    margin: 0;
    padding: 10px;
}

/* Layout wrapper */
.container {
    max-width: 900px;
    margin: auto;
}

/* Top toggle buttons */
.top-actions {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

.action-card {
    flex: 1;
    padding: 15px;
    border-radius: 12px;
    background: #e0e0e0;
    text-align: center;
    cursor: pointer;
    transition: 0.2s;
}

.action-card.active {
    background: #1f9d55;
    color: white;
}

.action-card h3 {
    margin: 0;
    font-size: 18px;
}

.action-card p {
    margin: 5px 0 0;
    font-size: 13px;
}

/* Main scanner card */
.card {
    background: #e6e6e6;
    padding: 20px;
    border-radius: 16px;
    text-align: center;
}

/* Title */
.card h2 {
    margin-bottom: 15px;
}

/* Scanner frame */
#reader {
    width: 100%;
    max-width: 500px;
    height: 350px; /* 👈 VERY IMPORTANT */
    margin: auto;
    border-radius: 16px;
    overflow: hidden;
    background: black;
}

/* Result */
.result {
    margin-top: 15px;
    font-size: 16px;
}

/* Status */
#status {
    margin-top: 10px;
    font-weight: bold;
}

.success {
    color: green;
}

.error {
    color: red;
}

/* Mobile responsiveness */
@media (max-width: 768px) {

    .top-actions {
        flex-direction: column;
    }

    .action-card {
        padding: 12px;
    }

    .card {
        padding: 15px;
    }

    #reader {
        max-width: 100%;
    }

    .card h2 {
        font-size: 18px;
    }
}

/* Small phones */
@media (max-width: 480px) {
    body {
        padding: 5px;
    }

    .action-card h3 {
        font-size: 16px;
    }

    .action-card p {
        font-size: 12px;
    }
}