:root {
    --bg: #f4f6fa;
    --surface: #ffffff;
    --text: #1e293b;
    --muted: #64748b;
    --heading: #0f2044;
    --border: #e2e8f0;
    --accent: #047857;
    --accent-soft: #ecfdf5;
}
:root.dark {
    --bg: #000000;
    --surface: #0f0f0f;
    --text: #e5e5e5;
    --muted: #a3a3a3;
    --heading: #ffffff;
    --border: #262626;
    --accent: #34d399;
    --accent-soft: rgba(5, 150, 105, 0.12);
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font: 16px/1.7 'Plus Jakarta Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;
}
a { color: var(--accent); }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.top {
    position: sticky; top: 0; z-index: 5;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}
.top-inner {
    max-width: 1080px; margin: 0 auto; padding: 12px 16px;
    display: flex; align-items: center; gap: 12px;
}
.top img { width: 36px; height: 36px; object-fit: contain; }
.top .name { font-weight: 700; color: var(--heading); font-size: 15px; line-height: 1.2; }
.top .name small { display: block; font-weight: 500; color: var(--muted); font-size: 12px; }
.top nav { margin-left: auto; display: flex; gap: 6px; flex-wrap: wrap; }
.top nav a {
    font-size: 13px; font-weight: 600; text-decoration: none; color: var(--muted);
    padding: 8px 12px; border-radius: 8px;
}
.top nav a[aria-current="page"] { color: var(--accent); background: var(--accent-soft); }

.layout {
    max-width: 1080px; margin: 0 auto; padding: 32px 16px 80px;
    display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: 40px;
}
.toc { position: sticky; top: 84px; align-self: start; font-size: 13.5px; }
.toc strong { display: block; color: var(--heading); margin-bottom: 8px; font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; }
.toc ol { margin: 0; padding-left: 18px; color: var(--muted); }
.toc li { margin: 4px 0; }
.toc a { color: var(--muted); text-decoration: none; }
.toc a:hover { color: var(--accent); }

article { max-width: 72ch; }
h1 { color: var(--heading); font-size: clamp(28px, 4vw, 36px); line-height: 1.15; margin: 0 0 8px; letter-spacing: -0.02em; }
.meta { color: var(--muted); font-size: 14px; margin: 0 0 24px; }
.summary {
    background: var(--accent-soft); border: 1px solid var(--border); border-radius: 14px;
    padding: 16px 20px; margin: 0 0 32px;
}
.summary p { margin: 0 0 8px; font-weight: 700; color: var(--heading); }
.summary ul { margin: 0; padding-left: 20px; }
h2 { color: var(--heading); font-size: 21px; margin: 40px 0 10px; scroll-margin-top: 84px; letter-spacing: -0.01em; }
h3 { color: var(--heading); font-size: 16.5px; margin: 24px 0 6px; }
p, li { color: var(--text); }
ul, ol { padding-left: 22px; }
li { margin: 4px 0; }
.table-wrap { overflow-x: auto; margin: 12px 0 20px; border: 1px solid var(--border); border-radius: 12px; }
table { border-collapse: collapse; width: 100%; min-width: 560px; font-size: 14px; background: var(--surface); }
th, td { text-align: left; vertical-align: top; padding: 10px 14px; border-bottom: 1px solid var(--border); }
th { color: var(--heading); font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em; }
tr:last-child td { border-bottom: none; }
.foot { margin-top: 48px; padding-top: 20px; border-top: 1px solid var(--border); color: var(--muted); font-size: 14px; }

@media (max-width: 860px) {
    .layout { grid-template-columns: minmax(0, 1fr); gap: 0; padding-top: 24px; }
    .toc { position: static; margin-bottom: 24px; padding: 14px 16px; background: var(--surface); border: 1px solid var(--border); border-radius: 12px; }
    .top nav a { padding: 8px 10px; }
}
@media (max-width: 600px) {
    .top-inner { flex-wrap: wrap; row-gap: 6px; }
    .top nav { margin-left: 0; width: 100%; }
}
@media print {
    .top, .toc { display: none; }
    .layout { display: block; padding: 0; }
    body { background: #fff; color: #000; }
}