body {
        font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        background-color: #f4f7fc;
        margin: 0;
        padding-top: 60px;
        padding-bottom: 80px;
        display: flex;
        align-items: center;
        height: 100vh;
        box-sizing: border-box;
        flex-direction: column;
    }

    header {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 35px;
        background-color: #1e3a8a;
        color: white;
        display: flex;
        align-items: flex-start;
        padding: 10px 20px;
        box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
        z-index: 1000;
    }

    header img {
        height: 32px;
        margin-right: 10px;
    }

    .img-bordered {
        /* border: 1px solid #ccc; */
        border-radius: 4px; /* 모서리를 살짝 둥글게 하고 싶다면 */
    }
    
    header span {
        font-size: 20px;
        font-weight: bold;
    }

    .container {
        background-color: #ffffff;
        border-radius: 8px;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        width: 100%;
        max-width: 800px;
        padding: 20px;
        text-align: center;
        box-sizing: border-box;
    }
    .textleft{
        text-align: left;
    }
    .textcenter{
        text-align: left;
    }

    h1 {
        color: #1e3a8a;
        font-size: 24px;
        margin-bottom: 20px;
    }

    p {
        color: #4b5563;
        font-size: 14px;
        margin-bottom: 20px;
    }

    .download-btn {
        background-color: #2563eb;
        color: white;
        padding: 12px 24px;
        font-size: 16px;
        border: none;
        border-radius: 6px;
        cursor: pointer;
        text-decoration: none;
        display: inline-block;
        margin-bottom: 20px;
        transition: background-color 0.3s;
    }

    .download-btn:hover {
        background-color: #1d4ed8;
    }

    .admin-link {
        position: fixed;
        bottom: 50px; /* ← 이 값을 늘려서 footer 위로 이동 */
        right: 10px;
        font-size: 10px;
        color: #9ca3af;
        text-decoration: none;
        background-color: #ffffff;
        border: 1px solid #d1d5db;
        padding: 4px 8px;
        border-radius: 4px;
    }

    .admin-link:hover {
        color: #6b7280;
        border-color: #9ca3af;
    }

    footer {
        position: fixed;
        bottom: 0;
        width: 100%;
        background-color: #f1f5f9;
        text-align: center;
        padding: 10px 0;
        font-size: 13px;
        color: #6b7280;
        border-top: 1px solid #e5e7eb;
    }
    file-list-container {
        background-color: #ffffff;
        border-radius: 8px;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        width: 100%;
        max-width: 800px;
        padding: 20px 30px;
        margin-top: 20px;
        text-align: left;
        box-sizing: border-box;
    }
    
    /* 파일 리스트 ul 스타일 */
    .file-list-container ul {
        list-style-type: none;
        padding-left: 0;
        margin: 0;
    }

    /* 파일 리스트 각 아이템 */
    .file-list-container li {
        margin-bottom: 0px;   /* 줄간격 */
        font-size: 16px;
    }

    /* 링크 스타일 */
    .file-list-container a {
        text-decoration: none;
        color: #2563eb;
        font-weight: 600;
        transition: color 0.3s ease;
    }

    /* 링크 호버 시 색 변경 */
    .file-list-container a:hover {
        color: #1d4ed8;
        text-decoration: underline;
    }

    .file-list-container ul {
    list-style-type: none;
    padding-left: 0;
    margin: 0;
    
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px 24px; /* 행간 12px, 열간 24px */

        
    }
            
    @media (max-width: 799px) {
        .container {
            min-width: auto;
            padding: 16px;
        }

        .file-list-container {
            grid-template-columns: repeat(1, 1fr); /* 한 줄에 하나씩 표시 */
        }

        header, footer {
            text-align: center;
            flex-direction: column;
        }

        header img {
            margin-bottom: 8px;
        }

    }