*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 2rem 1rem;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 1rem;
    line-height: 1.6;
    color: #1a1a1a;
    background: #e8eaed;
}

.doc-wrap {
    max-width: 48rem;
    margin: 0 auto;
    padding: 2rem 2.25rem;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

.doc-wrap h1 {
    margin-top: 0;
    font-size: 1.75rem;
    line-height: 1.25;
    border-bottom: 1px solid #e0e0e0;
    padding-bottom: 0.5rem;
}

.doc-wrap h2 {
    margin-top: 2rem;
    font-size: 1.35rem;
}

.doc-wrap h3 {
    margin-top: 1.5rem;
    font-size: 1.1rem;
}

.doc-wrap p,
.doc-wrap ul,
.doc-wrap ol,
.doc-wrap table,
.doc-wrap pre {
    margin: 0.75rem 0;
}

.doc-wrap ul,
.doc-wrap ol {
    padding-left: 1.5rem;
}

.doc-wrap table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.doc-wrap th,
.doc-wrap td {
    border: 1px solid #ddd;
    padding: 0.4rem 0.6rem;
    text-align: left;
    vertical-align: top;
}

.doc-wrap th {
    background: #f5f5f5;
}

.doc-wrap code {
    font-family: ui-monospace, "Cascadia Code", "Source Code Pro", Menlo, Consolas, monospace;
    font-size: 0.88em;
    background: #f4f4f4;
    padding: 0.15em 0.35em;
    border-radius: 3px;
}

.doc-wrap pre {
    overflow-x: auto;
    padding: 1rem;
    background: #f6f8fa;
    border-radius: 6px;
    font-size: 0.85rem;
}

.doc-wrap pre code {
    background: none;
    padding: 0;
}

.doc-wrap hr {
    border: none;
    border-top: 1px solid #e0e0e0;
    margin: 1.5rem 0;
}

.doc-wrap a {
    color: #1565c0;
}

.doc-wrap blockquote {
    margin: 1rem 0;
    padding: 0.5rem 1rem;
    border-left: 4px solid #ccc;
    color: #444;
    background: #fafafa;
}

.doc-wrap .katex-display {
    margin: 1rem 0;
    overflow-x: auto;
    overflow-y: hidden;
}

.doc-wrap .katex {
    font-size: 1.05em;
}