* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f9;
    color: #333;
    height: 100vh;
    overflow: hidden;
}

#site_header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 60px;
    background-color: #1e293b;
    color: #ffffff;
    display: flex;
    align-items: center;
    padding: 0 20px;
    font-size: 20px;
    font-weight: bold;
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.main-container {
    display: flex;
    margin-top: 60px; 
    height: calc(100vh - 60px);
    overflow-y: auto;
}

.content-box {
    background: #ffffff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    margin: 10px;
}

ol, ul {
    margin: 20px;
}