body {
            font-family: 'Roboto', Arial, sans-serif;
            line-height: 1.8;
            margin: 0;
            padding: 30px;
            background-color: #f5f5f5;
            color: #333333;
        }
        .container {
            max-width: 900px;
            margin: auto;
            background: #ffffff;
            padding: 30px;
            border-radius: 12px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
        }
        h1 {
            text-align: center;
            color: #1a1a1a;
            font-size: 2.0em;
            margin-bottom: 20px;
            text-transform: uppercase;
            letter-spacing: 1.5px;
        }
        h2 {
            color: #0077b6;
            font-size: 1.8em;
            border-bottom: 2px solid #0077b6;
            padding-bottom: 8px;
            margin-top: 30px;
        }
        h3 {
            color: #00b7eb;
            font-size: 1.4em;
            margin-top: 20px;
        }
        p {
            font-size: 1.1em;
            margin-bottom: 20px;
            color: #4a4a4a;
        }
        ul {
            list-style-type: none;
            padding: 0;
        }
        li {
            margin: 15px 0;
            font-size: 1.1em;
        }
        li ul {
            padding-left: 20px;
            list-style-type: disc;
            color: #666666;
        }
        .section-list {
            background: #e8ecef;
            padding: 15px;
            border-radius: 8px;
            margin-bottom: 30px;
        }
        .section-list a {
            display: block;
            font-size: 1.1em;
            margin: 10px 0;
            padding: 8px 12px;
            border-left: 3px solid transparent;
            transition: border-left-color 0.3s, background 0.3s;
            color: #333333;
        }
        .section-list a:hover {
            border-left-color: #0077b6;
            background: #d1d8dd;
            text-decoration: none;
        }
        .section-list a.subsection {
            padding-left: 25px;
            font-size: 1em;
            color: #4a4a4a;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            margin-bottom: 20px;
        }
        th, td {
            border: 1px solid #ddd;
            padding: 8px;
            text-align: left;
        }
        th {
            background-color: #f2f2f2;
        }
		.form-group {
            display: flex;
            justify-content: center;
            margin: 20px 0;
        }
        .calc-input {
            width: 300px;
            height: 100px;
            font-size: 1.8em;
            font-weight: bold;
            background-color: #0077b6;
            color: #ffffff;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            transition: background-color 0.3s, transform 0.2s;
        }
        .calc-input:hover {
            background-color: #00b7eb;
            transform: scale(1.05);
        }