body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 20px;
    background-color: #f4f4f4;
    color: #333;
}
.k070-container {
    max-width: 800px;
    margin: auto;
    background: #fff;
    padding: 20px 30px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
.k070-h1 {
    font-size: 2em;
    font-weight: bold;
    color: #005A9C;
    border-bottom: 2px solid #005A9C;
    padding-bottom: 5px;
    margin-top: 0;
    margin-bottom: 20px;
}
.k070-h2 {
    font-size: 1.4em;
    font-weight: bold;
    color: #005A9C;
    border-bottom: 2px solid #005A9C;
    padding-bottom: 5px;
    margin-top: 30px;
    margin-bottom: 15px;
}
.k070-h3 {
    font-size: 1.1em;
    font-weight: bold;
    color: #005A9C;
    border-bottom: 2px solid #005A9C;
    padding-bottom: 5px;
    margin-top: 20px;
    margin-bottom: 10px;
}
.k070-hr {
    border: 0;
    height: 1px;
    background: #ddd;
    margin: 25px 0;
}
.k070-calculator-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}
.k070-diagram-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    align-items: center;
}
.k070-input-group, .k070-output-group {
    background: #f9f9f9;
    padding: 20px;
    border-radius: 5px;
    border: 1px solid #ddd;
}
.k070-label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}
.k070-input-number {
    width: calc(100% - 22px);
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 1em;
}
.k070-unit {
    display: inline-block;
    margin-left: 5px;
    color: #666;
}
.k070-result-item {
    background: #e9f5ff;
    padding: 10px;
    margin-bottom: 10px;
    border-left: 5px solid #007BFF;
    border-radius: 4px;
}
.k070-result-label {
    font-weight: bold;
}
.k070-error {
    color: red;
    font-weight: bold;
    margin-top: 10px;
}
.k070-d3-container {
    text-align: center;
    margin-top: 15px;
    padding: 10px;
    border: 1px dashed #ccc;
    border-radius: 5px;
    background-color: #fafafa;
}
.k070-d3-label, .k070-d3-mode-label {
    font-family: 'Times New Roman', serif;
    font-size: 16px;
    font-style: italic;
    fill: #333;
}
.k070-d3-mode-label {
    font-size: 14px;
    font-style: normal;
}
#k070-report-section .k070-h2 {
   margin-bottom: 15px;
}
#k070-report-output {
    width: 100%;
    padding: 10px;
    box-sizing: border-box;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9em;
    background-color: #fdfdfd;
}