body {
    font-family: Arial, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    margin: 0;
    background-color: #f0f0f0;
}

#buttons {
    margin-bottom: 20px;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

button {
    padding: 10px 20px;
    font-size: 16px;
    margin: 10px 0; /* 수정된 부분: 세로 간격을 위해 변경 */
    cursor: pointer;
    width: 100%; /* 수정된 부분: 폭을 100%로 설정 */
    max-width: 300px; /* 선택 사항: 최대 폭을 설정하여 너무 넓어지지 않게 할 수 있습니다 */
}

#camera-container {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    position: relative;
    width: 150px;
    height: 150px;
}

video, canvas {
    width: 100%;
    height: 100%;
    border: 2px solid #000;
}

#scanner-overlay {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    height: 100%;
    pointer-events: none;
}

#scanner-bar {
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.7);
    position: absolute;
    top: 0;
    animation: scan-animation 2s linear infinite;
}

@keyframes scan-animation {
    0% {
        top: 0;
    }
    50% {
        top: 100%;
    }
    100% {
        top: 0;
    }
}