body {
      background-color: #e8ea66;
      color: white;
    }
    body {
        font-family: 'Arial', sans-serif;
        background: linear-gradient(135deg, #e8ea66 0%, #a28f4b 100%);
        min-height: 100vh;
    }
    
    /* 네비게이션 */
    nav a:hover {
        background: #e8ea66;
        color: white;
    }

    nav a.active {
        background: #e8ea66;
        color: white;
    }
                                  
    input:focus,
    select:focus,
    textarea:focus {
        outline: none;
        border-color: #e8ea66;
    }

    /* 버튼 */
    button {
        width: 100%;
        padding: 12px;
        background: linear-gradient(135deg, #e8ea66 0%, #a28f4b 100%);
        color: white;
        border: none;
        border-radius: 5px;
        font-size: 16px;
        font-weight: bold;
        cursor: pointer;
        transition: transform 0.2s;
    }
    .header {
        background: linear-gradient(135deg, #e8ea66 0%, #a28f4b 100%);
        color: white;
        padding: 30px;
        text-align: center;
    }
    .header h1 { font-size: 2em; margin-bottom: 10px; }
    .section {
        background: #f8f9fa;
        border-radius: 10px;
        padding: 25px;
        margin-bottom: 20px;
    }
    .section h2 {
        color: #e8ea66;
        margin-bottom: 20px;
        font-size: 1.5em;
    }
    .form-group {
        margin-bottom: 15px;
    }
    label {
        display: block;
        margin-bottom: 5px;
        color: #333;
        font-weight: 600;
    }
    input[type="text"],
    input[type="password"],
    input[type="file"] {
        width: 100%;
        padding: 12px;
        border: 2px solid #e0e0e0;
        border-radius: 8px;
        font-size: 14px;
        transition: border-color 0.3s;
    }
    input[type="text"]:focus,
    input[type="password"]:focus {
        outline: none;
        border-color: #e8ea66;
    }
    .file-upload {
        border: 3px dashed #e8ea66;
        border-radius: 10px;
        padding: 30px;
        text-align: center;
        cursor: pointer;
        transition: background 0.3s;
    }
    .file-upload:hover {
        background: #f0f4ff;
    }
    .file-upload input[type="file"] {
        display: none;
    }
    .btn {
        padding: 12px 30px;
        border: none;
        border-radius: 8px;
        font-size: 16px;
        font-weight: 600;
        cursor: pointer;
        transition: all 0.3s;
        width: 100%;
    }
    .btn-primary {
        background: linear-gradient(135deg, #e8ea66 0%, #a28f4b 100%);
        color: white;
    }
    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
    }
    .btn-success {
        background: #28a745;
        color: white;
        margin-top: 10px;
    }
    .btn-success:hover {
        background: #218838;
    }
    .table-container {
        overflow-x: auto;
        margin-top: 20px;
    }
    table {
        width: 100%;
        border-collapse: collapse;
        background: white;
    }
    th, td {
        padding: 12px;
        text-align: left;
        border-bottom: 1px solid #e0e0e0;
    }
    th {
        background: #e8ea66;
        color: white;
        font-weight: 600;
    }
    td {
        background: #a28f4b;
    }
                                  
    tr:hover {
        background: #f8f9fa;
    }
    .alert {
        padding: 15px;
        border-radius: 8px;
        margin-bottom: 20px;
        display: none;
    }
    .alert-success {
        background: #d4edda;
        color: #155724;
        border: 1px solid #c3e6cb;
    }
    .alert-error {
        background: #f8d7da;
        color: #721c24;
        border: 1px solid #f5c6cb;
    }
    .stats {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 15px;
        margin-top: 20px;
    }
    .stat-card {
        background: white;
        padding: 20px;
        border-radius: 10px;
        text-align: center;
        box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    }
    .stat-value {
        font-size: 2em;
        font-weight: bold;
        color: #e8ea66;
    }
    .stat-label {
        color: #666;
        margin-top: 5px;
    }
    .loading {
        display: none;
        text-align: center;
        padding: 20px;
    }
    .spinner {
        border: 4px solid #f3f3f3;
        border-top: 4px solid #e8ea66;
        border-radius: 50%;
        width: 40px;
        height: 40px;
        animation: spin 1s linear infinite;
        margin: 0 auto;
    }
                                  
    footer {
        display: flex;
        justify-content: center;
        align-items: center;
        padding: 20px;
    }    
    @keyframes spin {
        0% { transform: rotate(0deg); }
        100% { transform: rotate(360deg); }
    }