:root {
    --bm-primary: #2563EB;
    --bm-primary-dark: #1D4ED8;
    --bm-primary-soft: #EFF6FF;
    --bm-primary-rgb: 37 99 235;
    --ink: #1E293B;
    --muted: #64748B;
    --line: #E2E8F0;
    --bg: #F8FAFC;
    --card: #ffffff;
    --radius: 0.9rem;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; color-scheme: light; }
body {
    margin: 0;
    font: 16px/1.65 "Plus Jakarta Sans", ui-sans-serif, system-ui, sans-serif;
    color: var(--ink);
    background: var(--bg);
    letter-spacing: -0.011em;
}
a { color: var(--bm-primary); }
a:hover { color: var(--bm-primary-dark); }

.doc-figure {
    margin: 1.15rem 0 1.45rem;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.05);
}
.doc-figure img {
    display: block;
    width: 100%;
    height: auto;
    max-height: none;
    object-fit: contain;
    object-position: top center;
    background: #f1f5f9;
}
.doc-figure figcaption {
    padding: 0.7rem 0.95rem 0.85rem;
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--muted);
    border-top: 1px solid var(--line);
}
.doc-figure.is-missing {
    min-height: 12rem;
    display: grid;
    place-items: stretch;
}
.doc-figure.is-missing img {
    display: none;
}
.doc-figure.is-missing::before {
    content: attr(data-file);
    display: grid;
    place-items: center;
    min-height: 11rem;
    padding: 1.5rem;
    text-align: center;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--muted);
    background:
        linear-gradient(#f1f5f9, #f1f5f9) padding-box,
        repeating-linear-gradient(-45deg, #e2e8f0 0 8px, #f8fafc 8px 16px);
}

.skip {
    position: absolute;
    left: 1rem;
    top: 1rem;
    z-index: 80;
    padding: 0.5rem 0.8rem;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 0.6rem;
    font-weight: 700;
    transform: translateY(-160%);
}
.skip:focus { transform: none; }

.docs {
    display: grid;
    grid-template-columns: 272px minmax(0, 1fr);
    min-height: 100dvh;
    background: var(--bg);
}
.docs.has-toc {
    grid-template-columns: 272px minmax(0, 1fr);
}

.sidebar {
    position: sticky;
    top: 0;
    height: 100dvh;
    overflow: auto;
    background: #fff;
    color: var(--ink);
    padding: 1.1rem 0.85rem 2rem;
    border-right: 1px solid var(--line);
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    text-decoration: none;
    color: inherit;
    padding: 0.2rem 0.4rem 1rem;
}
.sidebar-mark {
    width: 2.4rem;
    height: 2.4rem;
    border-radius: 0.75rem;
    display: grid;
    place-items: center;
    background: var(--bm-primary);
    color: #fff;
    flex-shrink: 0;
}
.sidebar-mark svg { width: 1.15rem; height: 1.15rem; display: block; }
.sidebar-name { display: block; font-weight: 800; letter-spacing: -0.03em; font-size: 0.98rem; color: var(--ink); }
.sidebar-tag { display: block; font-size: 0.68rem; color: var(--muted); font-weight: 600; }

.nav-search {
    width: 100%;
    height: 2.35rem;
    margin: 0 0 0.75rem;
    padding: 0 0.75rem;
    border: 1px solid var(--line);
    border-radius: 0.65rem;
    background: var(--bg);
    color: var(--ink);
    font: inherit;
    font-size: 0.8rem;
}
.nav-search::placeholder { color: #94A3B8; }
.nav-search:focus {
    outline: none;
    border-color: var(--bm-primary);
    background: #fff;
    box-shadow: 0 0 0 3px rgb(var(--bm-primary-rgb) / 0.14);
}

.nav-group {
    margin: 0.85rem 0.45rem 0.28rem;
    font-size: 0.65rem;
    font-weight: 800;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: #94A3B8;
}
.nav-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.44rem 0.65rem;
    border-radius: 0.55rem;
    color: #475569;
    text-decoration: none;
    font-size: 0.8125rem;
    font-weight: 600;
}
.nav-item:hover { background: var(--bm-primary-soft); color: var(--bm-primary-dark); }
.nav-item.is-on {
    background: var(--bm-primary-soft);
    color: var(--bm-primary-dark);
    box-shadow: inset 3px 0 0 var(--bm-primary);
}

.search-field {
    width: min(100%, 28rem);
    height: 2.7rem;
    padding: 0 1rem;
    border: 1px solid var(--line);
    border-radius: 0.8rem;
    background: #fff;
    color: var(--ink);
    font: inherit;
    margin: 0 0 1rem;
}
.search-field::placeholder { color: var(--muted); }
.search-field:focus {
    outline: none;
    border-color: var(--bm-primary);
    box-shadow: 0 0 0 3px rgb(var(--bm-primary-rgb) / 0.16);
}

.split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
}

.stage {
    min-width: 0;
    display: flex;
    flex-direction: column;
    background: var(--bg);
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.75rem 1.75rem;
    background: rgb(255 255 255 / 0.92);
    border-bottom: 1px solid var(--line);
    position: sticky;
    top: 0;
    z-index: 20;
}
.menu-btn {
    display: none;
    width: 2.4rem;
    height: 2.4rem;
    border: 1px solid var(--line);
    border-radius: 0.65rem;
    background: var(--card);
    cursor: pointer;
    color: var(--ink);
}
.topbar-title { font-size: 0.82rem; font-weight: 700; color: var(--muted); }
.topbar a.ghost {
    font-size: 0.8rem;
    font-weight: 700;
    text-decoration: none;
    color: var(--bm-primary);
}

.doc {
    flex: 1;
    width: 100%;
    max-width: none;
    padding: 1.75rem 2rem 3.5rem;
}

.hero {
    position: relative;
    overflow: hidden;
    padding: 1.55rem 1.7rem 1.45rem;
    margin: 0 0 1.5rem;
    border-radius: 1.15rem;
    color: var(--ink);
    background:
        linear-gradient(180deg, #EFF6FF 0%, #FFFFFF 78%);
    border: 1px solid color-mix(in srgb, var(--bm-primary) 16%, var(--line));
}
.hero::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--bm-primary);
}
.hero .kicker { color: var(--bm-primary); }
.hero h1 { color: var(--ink); margin-bottom: 0.45rem; }
.hero p,
.hero .lead { color: var(--muted); margin: 0; max-width: 70ch; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-top: 1.1rem; }

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    height: 2.5rem;
    padding: 0 1rem;
    border-radius: 0.7rem;
    font-size: 0.875rem;
    font-weight: 700;
    text-decoration: none;
    border: 1px solid transparent;
}
.btn-light,
.btn-primary {
    background: var(--bm-primary);
    color: #fff;
}
.btn-light:hover,
.btn-primary:hover { background: var(--bm-primary-dark); color: #fff; }
.btn-ghost {
    background: #fff;
    color: var(--bm-primary-dark);
    border-color: color-mix(in srgb, var(--bm-primary) 22%, var(--line));
}
.btn-ghost:hover { color: var(--bm-primary-dark); background: var(--bm-primary-soft); }

.kicker {
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--bm-primary);
    margin: 0 0 0.4rem;
}
h1 {
    margin: 0 0 0.5rem;
    font-family: "Plus Jakarta Sans", ui-sans-serif, system-ui, sans-serif;
    font-size: clamp(1.75rem, 2.6vw, 2.25rem);
    font-weight: 800;
    letter-spacing: -0.025em;
    line-height: 1.18;
    color: var(--ink);
}
h2 {
    margin: 2rem 0 0.65rem;
    font-family: "Plus Jakarta Sans", ui-sans-serif, system-ui, sans-serif;
    font-size: 1.32rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    scroll-margin-top: 4.5rem;
    color: var(--ink);
}
h3 { margin: 1.3rem 0 0.4rem; font-size: 1.02rem; scroll-margin-top: 4.5rem; color: var(--ink); }
h4 { margin: 1rem 0 0.35rem; font-size: 0.92rem; color: var(--ink); }
p, li { color: var(--muted); }
.lead { font-size: 1.02rem; color: var(--muted); margin: 0 0 1.15rem; max-width: 78ch; }
.crumb { font-size: 0.8rem; color: var(--muted); margin-bottom: 0.5rem; }
.crumb a { color: var(--muted); text-decoration: none; }
.crumb a:hover { color: var(--bm-primary); }

code, pre { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.8125rem; }
code {
    background: var(--bm-primary-soft);
    color: var(--bm-primary-dark);
    padding: 0.08rem 0.38rem;
    border-radius: 0.35rem;
}
pre {
    background: #F1F5F9;
    color: #0F172A;
    padding: 0.9rem 1rem;
    border-radius: var(--radius);
    overflow: auto;
    border: 1px solid var(--line);
}
pre code { background: none; color: inherit; padding: 0; }

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card);
    margin: 0.7rem 0 1.1rem;
    border-radius: 0.8rem;
    overflow: hidden;
    border: 1px solid var(--line);
}
th, td { padding: 0.62rem 0.8rem; text-align: left; font-size: 0.875rem; vertical-align: top; border-bottom: 1px solid var(--line); }
th {
    background: var(--bm-primary-soft);
    color: var(--bm-primary-dark);
    font-weight: 700;
}
tr:last-child td { border-bottom: 0; }

.note, .warn, .ok {
    padding: 0.85rem 1rem;
    border-radius: 0.8rem;
    margin: 0.9rem 0;
    font-size: 0.875rem;
}
.note { background: var(--bm-primary-soft); border: 1px solid rgb(var(--bm-primary-rgb) / 0.22); color: var(--bm-primary-dark); }
.warn { background: #FFF7ED; border: 1px solid #FED7AA; color: #9A3412; }
.ok { background: #ECFDF5; border: 1px solid #A7F3D0; color: #065F46; }

.path {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
    margin: 0 0 1.5rem;
}
.path a {
    display: block;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 1rem;
    padding: 1rem 1.05rem;
    text-decoration: none;
    color: inherit;
}
.path a:hover {
    border-color: rgb(var(--bm-primary-rgb) / 0.4);
    box-shadow: 0 10px 24px -18px rgb(var(--bm-primary-rgb) / 0.45);
}
.path .n {
    display: grid;
    place-items: center;
    width: 1.7rem;
    height: 1.7rem;
    border-radius: 99px;
    background: var(--bm-primary);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 800;
    margin-bottom: 0.55rem;
}
.path h3 { margin: 0 0 0.25rem; color: var(--ink); }
.path p { margin: 0; font-size: 0.8rem; }

.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 0.85rem; margin: 0.7rem 0 1.4rem; }
.card {
    display: block;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 1rem;
    padding: 1rem 1.05rem 0.95rem;
    text-decoration: none;
    color: inherit;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.card:hover {
    border-color: rgb(var(--bm-primary-rgb) / 0.4);
    box-shadow: 0 12px 28px -22px rgb(var(--bm-primary-rgb) / 0.5);
    color: inherit;
}
.card-ico {
    width: 2.15rem;
    height: 2.15rem;
    border-radius: 0.65rem;
    display: grid;
    place-items: center;
    background: var(--bm-primary-soft);
    color: var(--bm-primary);
    font-size: 0.72rem;
    font-weight: 800;
    margin-bottom: 0.65rem;
}
.card h3 { margin: 0 0 0.3rem; color: var(--ink); font-size: 0.98rem; }
.card p { margin: 0; font-size: 0.8rem; }
.card .go { display: inline-block; margin-top: 0.55rem; font-size: 0.75rem; font-weight: 800; color: var(--bm-primary); }

.link-list { display: grid; gap: 0.35rem; margin: 0.4rem 0 1.2rem; padding: 0; list-style: none; }
.link-list a {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.55rem 0.75rem;
    border-radius: 0.7rem;
    background: var(--card);
    border: 1px solid var(--line);
    text-decoration: none;
    color: var(--ink);
    font-size: 0.875rem;
    font-weight: 600;
}
.link-list a:hover { border-color: rgb(var(--bm-primary-rgb) / 0.35); color: var(--bm-primary-dark); }
.link-list span { color: var(--muted); font-weight: 500; font-size: 0.78rem; }

.cols-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.1rem;
}

.checks { margin: 0.5rem 0 1.1rem; padding: 0; list-style: none; }
.checks li {
    position: relative;
    padding: 0.45rem 0.2rem 0.45rem 1.85rem;
    color: var(--muted);
    font-size: 0.9rem;
}
.checks li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.55rem;
    width: 1.05rem;
    height: 1.05rem;
    border-radius: 99px;
    background: var(--bm-primary) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpath fill='none' stroke='%23fff' stroke-width='1.8' stroke-linecap='round' d='M2.4 6.2 4.8 8.6 9.6 3.4'/%3E%3C/svg%3E") center / 0.7rem no-repeat;
}

.onpage {
    margin: 0 0 1.35rem;
    padding: 0.9rem 1rem 0.35rem;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 1rem;
}
.onpage .link-list {
    margin: 0 0 0.7rem;
    grid-template-columns: 1fr 1fr;
}
.onpage .link-list a { background: var(--bm-primary-soft); border-color: transparent; }

.toc-rail {
    display: none;
    position: sticky;
    top: 0;
    height: 100dvh;
    overflow: auto;
    padding: 1.2rem 1rem 2rem 0.85rem;
    background: #fff;
    border-left: 1px solid var(--line);
}
.toc-rail .kicker { padding: 0 0.35rem; }
.toc-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.15rem; }
.toc-list a {
    display: block;
    padding: 0.38rem 0.55rem;
    border-radius: 0.5rem;
    text-decoration: none;
    color: var(--muted);
    font-size: 0.78rem;
    font-weight: 600;
    line-height: 1.35;
    border-left: 2px solid transparent;
}
.toc-list a:hover { color: var(--bm-primary-dark); background: var(--bm-primary-soft); }
.toc-list a.is-on {
    color: var(--bm-primary-dark);
    background: var(--bm-primary-soft);
    border-left-color: var(--bm-primary);
}

.pager {
    display: flex;
    justify-content: space-between;
    align-items: stretch;
    gap: 1rem;
    margin-top: 1.9rem;
    padding-top: 1.05rem;
    border-top: 1px solid var(--line);
}
.pager-slot { display: none; }
.pager-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.7rem;
    flex: 1 1 0;
    max-width: 20rem;
    min-height: 3.15rem;
    padding: 0.55rem 0.8rem 0.55rem 0.55rem;
    border-radius: 0.75rem;
    border: 1px solid var(--line);
    background: #fff;
    text-decoration: none;
    color: var(--ink);
    min-width: 0;
}
.pager-next {
    margin-left: auto;
    padding: 0.55rem 0.55rem 0.55rem 0.8rem;
    text-align: right;
    justify-content: flex-end;
}
.pager-btn:hover {
    border-color: rgb(var(--bm-primary-rgb) / 0.4);
    background: var(--bm-primary-soft);
    color: var(--ink);
}
.pager-ico {
    flex-shrink: 0;
    width: 1.85rem;
    height: 1.85rem;
    border-radius: 99px;
    display: grid;
    place-items: center;
    background: var(--bm-primary-soft);
    color: var(--bm-primary);
}
.pager-arrow { width: 0.88rem; height: 0.88rem; display: block; }
.pager-copy { min-width: 0; }
.pager-copy small {
    display: block;
    color: var(--muted);
    font-size: 0.62rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    line-height: 1;
    margin-bottom: 0.18rem;
}
.pager-copy strong {
    display: block;
    font-size: 0.88rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.25;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.foot { margin-top: 1.4rem; font-size: 0.78rem; color: var(--muted); }

.backdrop { display: none; }
body.nav-open .backdrop {
    display: block;
    position: fixed;
    inset: 0;
    background: rgb(15 23 42 / 0.28);
    z-index: 30;
}

@media (min-width: 1180px) {
    .docs.has-toc {
        grid-template-columns: 272px minmax(0, 1fr) 248px;
    }
    .docs.has-toc .toc-rail { display: block; }
    .docs.has-toc .onpage { display: none; }
}

@media (max-width: 900px) {
    .docs,
    .docs.has-toc { grid-template-columns: 1fr; }
    .sidebar {
        position: fixed;
        inset: 0 auto 0 0;
        width: min(86vw, 300px);
        z-index: 40;
        transform: translateX(-105%);
        transition: transform 0.2s ease;
        box-shadow: none;
    }
    body.nav-open .sidebar { transform: none; box-shadow: 8px 0 30px rgb(15 23 42 / 0.12); }
    .menu-btn { display: grid; place-items: center; }
    .doc { padding: 1.2rem 1.05rem 3rem; }
    .path,
    .split,
    .cols-2,
    .onpage .link-list { grid-template-columns: 1fr; }
    .toc-rail { display: none !important; }
}

@media (max-width: 760px) {
    .cols-2 { grid-template-columns: 1fr; }
}

@media print {
    .sidebar, .topbar, .pager, .skip, .toc-rail { display: none !important; }
    .docs, .docs.has-toc { display: block; }
    .doc { max-width: none; padding: 0; }
    .onpage { display: none; }
}