:root{--cpp-ink:#0f1b2d;--cpp-ink-2:#334155;--cpp-muted:#64748b;--cpp-line:#dfe7ef;--cpp-bg:#f7fafd;--cpp-bg-2:#eef4fa;--cpp-card:#ffffff;--cpp-accent:#0369a1;--cpp-accent-2:#0ea5e9}
body{font-family:"Hiragino Sans","Noto Sans JP","Yu Gothic",system-ui,-apple-system,sans-serif!important;background:#f7fafd!important;color:var(--cpp-ink)!important;line-height:1.72!important}
.top-nav{position:sticky;top:0;z-index:50;background:rgba(247,250,253,.92);backdrop-filter:saturate(150%) blur(8px);border-bottom:1px solid var(--cpp-line)}
.top-nav-inner{max-width:1120px;margin:0 auto;padding:12px 20px;display:flex;gap:20px;align-items:center;flex-wrap:wrap;font-size:14px}
.top-nav .brand{font-weight:800;color:var(--cpp-ink);text-decoration:none;font-size:15px}
.top-nav .brand em{font-style:normal;color:var(--cpp-accent)}
.top-nav-links{display:flex;gap:16px;margin-left:auto;flex-wrap:wrap;align-items:center}
.top-nav-links a{color:var(--cpp-ink-2);text-decoration:none;font-weight:600}
.top-nav-links a:hover{color:var(--cpp-accent)}
.top-nav-links .div{color:#cbd5e1}
.page-wrap{max-width:920px;margin:0 auto;padding:0 20px}
.crumb{padding:16px 0 8px;font-size:13px;color:var(--cpp-muted)}
.crumb a{color:var(--cpp-accent);text-decoration:none}
.page-head{padding:24px 0 12px}
.page-head h1{font-size:clamp(26px,3.5vw,34px);font-weight:800;color:var(--cpp-ink);line-height:1.4}
.page-head .lead{color:var(--cpp-ink-2);font-size:15.5px;margin-top:10px;line-height:1.8}
.learn-box{background:var(--cpp-card);border:1px solid var(--cpp-line);border-radius:10px;padding:20px 22px;margin:20px 0}
.learn-box .ttl{font-size:14px;font-weight:700;color:var(--cpp-ink);margin-bottom:14px}
.learn-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media(max-width:720px){.learn-grid{grid-template-columns:1fr}}
.learn-col{background:#fff;border:1px solid var(--cpp-line);border-radius:8px;padding:14px 16px}
.learn-col .hd{font-size:12.5px;font-weight:700;margin-bottom:8px}
.learn-col.min{background:#ecfdf5;border-color:#bbf7d0}.learn-col.min .hd{color:#047857}
.learn-col.opt{background:#fffbeb;border-color:#fde68a}.learn-col.opt .hd{color:#b45309}
.learn-col ul{font-size:14px;color:var(--cpp-ink-2);line-height:1.85;margin:0;padding-left:20px}
.learn-col code{background:#fff;border:1px solid var(--cpp-line);padding:1px 6px;border-radius:4px;font-size:13px;color:var(--cpp-ink);font-family:"Consolas","Monaco",monospace}
.toc{background:var(--cpp-card);border:1px solid var(--cpp-line);border-radius:10px;padding:16px 20px;margin:20px 0}
.toc .hd{font-size:12px;font-weight:700;color:var(--cpp-muted);margin-bottom:10px;text-transform:uppercase}
.toc ol{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:4px}
.toc li a{display:flex;gap:12px;padding:8px 12px;border-radius:6px;text-decoration:none;color:var(--cpp-ink-2);font-size:14.5px;border:1px solid transparent}
.toc li a:hover{background:var(--cpp-bg-2);border-color:var(--cpp-line);color:var(--cpp-ink)}
.toc li a .n{min-width:22px;color:var(--cpp-accent);font-weight:700}
section.block{background:var(--cpp-card);border:1px solid var(--cpp-line);border-radius:12px;padding:28px 30px;margin:20px 0;scroll-margin-top:80px}
section.block h2{font-size:22px;font-weight:700;color:var(--cpp-ink);margin-bottom:14px;border-left:3px solid var(--cpp-accent);padding-left:12px}
section.block h3{font-size:16.5px;font-weight:700;color:var(--cpp-ink);margin:20px 0 10px}
section.block h4{font-size:14.5px;font-weight:700;color:#0369a1;margin:16px 0 6px}
section.block p{font-size:15px;color:var(--cpp-ink-2);line-height:1.9;margin:10px 0}
section.block b{color:var(--cpp-ink)}
section.block code{background:#eef4fa;border:1px solid var(--cpp-line);padding:1px 6px;border-radius:4px;font-size:13.5px;color:var(--cpp-ink);font-family:"Consolas","Monaco",monospace}
section.block ul{font-size:15px;color:var(--cpp-ink-2);line-height:1.95;padding-left:22px;margin:10px 0}
.note{background:var(--cpp-bg-2);border-left:3px solid var(--cpp-accent-2);padding:12px 16px;border-radius:0 8px 8px 0;margin:14px 0;font-size:14px;color:var(--cpp-ink-2);line-height:1.8}
.note b{color:var(--cpp-ink)}
.warn{background:#fff7ed;border-left:3px solid #f97316;padding:12px 16px;border-radius:0 8px 8px 0;margin:14px 0;font-size:14px;color:#7c2d12;line-height:1.8}
.warn b{color:#7c2d12}

/* Container cards (overview grid) */
.cont-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px;margin:14px 0}
.cont-card{background:#fff;border:1px solid var(--cpp-line);border-radius:10px;padding:14px 16px;text-decoration:none;color:inherit;transition:.15s;display:flex;flex-direction:column;gap:6px}
.cont-card:hover{border-color:var(--cpp-accent);background:var(--cpp-bg-2);transform:translateY(-1px)}
.cont-card .nm{font-family:"Consolas","Monaco",monospace;font-size:15px;font-weight:700;color:var(--cpp-accent)}
.cont-card .tag{align-self:flex-start;font-size:10.5px;font-weight:700;padding:2px 8px;border-radius:4px;letter-spacing:.04em}
.cont-card .tag.seq{background:#dbeafe;color:#1e40af}
.cont-card .tag.asoc{background:#fce7f3;color:#9f1239}
.cont-card .tag.unord{background:#fef3c7;color:#92400e}
.cont-card .tag.adapt{background:#e0e7ff;color:#3730a3}
.cont-card .dsc{font-size:13px;color:var(--cpp-ink-2);line-height:1.65}
.cont-card .mt{font-size:11.5px;color:var(--cpp-muted);margin-top:auto;padding-top:4px;border-top:1px dashed var(--cpp-line)}

/* Flowchart */
.flow{background:#fff;border:1px solid var(--cpp-line);border-radius:10px;padding:18px 20px;margin:14px 0;font-size:14.5px;line-height:2}
.flow .q{font-weight:700;color:var(--cpp-ink);margin-top:14px}
.flow .q:first-child{margin-top:0}
.flow .a{padding-left:18px;color:var(--cpp-ink-2)}
.flow .arr{color:var(--cpp-accent);font-weight:700}
.flow .chosen{background:#ecfdf5;border:1px solid #bbf7d0;padding:2px 8px;border-radius:4px;color:#047857;font-weight:700;font-family:"Consolas","Monaco",monospace}

.cmp-tbl{width:100%;border-collapse:collapse;font-size:13px;margin:12px 0}
.cmp-tbl th,.cmp-tbl td{border:1px solid var(--cpp-line);padding:8px 10px;text-align:left;vertical-align:top}
.cmp-tbl th{background:var(--cpp-bg-2);color:var(--cpp-ink);font-weight:700;font-size:12px}
.cmp-tbl code{background:#f1f5f9;padding:1px 5px;border-radius:3px;font-size:12px}
.cmp-tbl .fast{color:#059669;font-weight:700}
.cmp-tbl .slow{color:#dc2626;font-weight:700}
.cmp-tbl .mid{color:#b45309;font-weight:700}

.related{margin:32px 0 10px}
.related h2{font-size:18px;font-weight:700;color:var(--cpp-ink);margin-bottom:12px;border-left:3px solid var(--cpp-accent);padding-left:12px}
.rel-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:10px}
.rel-card{display:block;background:var(--cpp-card);border:1px solid var(--cpp-line);border-radius:8px;padding:14px 16px;text-decoration:none;color:inherit}
.rel-card:hover{border-color:var(--cpp-accent);background:var(--cpp-bg-2)}
.rel-card .k{font-size:11px;color:var(--cpp-muted);font-weight:700}
.rel-card .t{font-size:14.5px;font-weight:700;color:var(--cpp-ink);margin-top:3px}
.rel-card .d{font-size:13px;color:var(--cpp-ink-2);margin-top:4px;line-height:1.6}
.pager{margin:20px 0;display:flex;gap:12px;flex-wrap:wrap}
.pager a{flex:1;min-width:220px;display:block;background:var(--cpp-card);border:1px solid var(--cpp-line);border-radius:8px;padding:16px 18px;text-decoration:none;color:inherit}
.pager a:hover{border-color:var(--cpp-accent);background:var(--cpp-bg-2)}
.pager a.next{text-align:right;background:var(--cpp-bg-2)}
.pager a .k{font-size:11px;color:var(--cpp-muted)}
.pager a .t{font-size:14.5px;font-weight:700;color:var(--cpp-ink);margin-top:4px}
.page-footer{max-width:1120px;margin:30px auto 0;padding:20px;color:var(--cpp-muted);font-size:13px;border-top:1px solid var(--cpp-line);display:flex;gap:16px;justify-content:space-between;flex-wrap:wrap}
.page-footer nav{display:flex;gap:16px;flex-wrap:wrap}
.page-footer a{color:var(--cpp-ink-2);text-decoration:none}