:root{--bg:#e8ecef;--card:#fff;--text:#24292e;--muted:#5b6770;--line:#dfe4e8;--accent:#0ec0fc;--link:#0a6f9c;--link-hover:#085a7e;--sel:#0a6f9c;--radius:14px;--shadow:0 1px 2px rgba(0,0,0,.06),0 4px 16px rgba(0,0,0,.05);--font:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;--head:"Trebuchet MS",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif}*,*:before,*:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.65 var(--font)}a{color:var(--link)}a:hover{color:var(--link-hover)}img{max-width:100%;height:auto;border:0}h1,h2,h3,h4{font-family:var(--head);font-weight:700;line-height:1.2;margin:0 0 .6em;letter-spacing:-.01em}h1{font-size:1.9rem;margin-bottom:.7em}h2{font-size:1.4rem;margin-top:1.4em}h3{font-size:1.15rem;margin-top:1.2em}p{margin:0 0 1.1em}ul,ol{margin:0 0 1.1em;padding-left:1.4em}hr{border:0;border-top:1px solid var(--line);margin:1.2em 0}.skip-link{position:absolute;left:-999px;top:0;background:#fff;padding:.5em 1em;z-index:100}.skip-link:focus{left:8px;top:8px}.page{max-width:1160px;margin:0 auto;padding:12px 12px 24px}.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow)}.hero{position:relative;overflow:hidden;border-radius:var(--radius);min-height:128px;display:flex;align-items:flex-end;color:#fff;background:#3b4a56;box-shadow:var(--shadow)}.hero picture,.hero img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center 40%}.hero:after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,#0000000d,#00000073)}.hero .brand{position:relative;z-index:1;padding:18px 20px 14px;text-decoration:none;color:#fff;display:block;flex:1}.hero .brand strong{display:block;font:700 2.2rem/1.05 var(--head);letter-spacing:-.03em;text-shadow:0 2px 8px rgba(0,0,0,.6)}.hero .brand span{display:block;font:700 1.05rem/1.3 var(--head);opacity:.95;text-shadow:0 1px 4px rgba(0,0,0,.6)}.nav-toggle{position:relative;z-index:1;margin:0 14px 14px 0;padding:10px 12px;border:0;border-radius:10px;background:#ffffffeb;color:#24292e;font:600 .95rem var(--font);display:inline-flex;align-items:center;gap:8px;cursor:pointer}.nav-toggle svg{width:20px;height:20px}.nav-toggle .ico-close,.nav-open .nav-toggle .ico-menu{display:none}.nav-open .nav-toggle .ico-close{display:block}.layout{display:grid;grid-template-columns:minmax(0,1fr);gap:16px;margin-top:16px}.sitenav{display:none}.nav-open .sitenav{display:block}.sitenav ul{list-style:none;margin:0;padding:0}.sitenav>div>ul{padding:8px 0}.sitenav li a{display:block;padding:9px 18px;font:700 .95rem/1.25 var(--head);color:var(--text);text-decoration:none;border-top:1px solid var(--line)}.sitenav>div>ul>li:first-child>a{border-top:0}.sitenav li a:hover{background:#eef8fd;color:var(--link-hover)}.sitenav li.selected>a,.sitenav li.subselected>a{background:var(--sel);color:#fff}.sitenav li.subselected>a{background:#e6f6fd;color:var(--sel)}.sitenav ul ul{display:none}.sitenav li.selected>ul,.sitenav li.subselected>ul{display:block}.sitenav ul ul a{padding-left:32px;font-size:.87rem;font-weight:600}.sitenav ul ul ul a{padding-left:46px}.sitenav ul ul li.selected>a{background:var(--sel);color:#fff}.sidebar{display:flex;flex-direction:column;gap:16px}.article{padding:18px 18px 22px}.article #content>h1:first-child{margin-top:0}.article .folders ul{padding-left:1.2em}.article img[style]{height:auto!important}.shapes{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:14px;margin:0 0 1.4em}.shapes figure{margin:0;padding:10px 6px;background:#f7fafc;border:1px solid var(--line);border-radius:10px;text-align:center;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;gap:8px}.shapes img{display:block;height:64px;width:auto;max-width:100%;object-fit:contain;margin:0}.shapes figcaption{font-size:.78rem;line-height:1.25}.shapes figcaption strong{display:block}.shapes figcaption span{color:var(--muted)}.article table{border-collapse:collapse;width:100%;font-size:.92rem;margin:0 0 1.4em}.article th,.article td{text-align:left;vertical-align:top;padding:7px 10px;border-bottom:1px solid var(--line)}.article th{background:#f2f6f9;font-size:.8rem;letter-spacing:.03em;text-transform:uppercase;color:var(--muted)}.img-credit{font-size:.82rem;color:var(--muted);margin-top:6px}.article-meta{margin:28px 0 0;padding-top:12px;border-top:1px solid var(--line);color:var(--muted);font-size:.85rem}.sources{font-size:.9rem;color:var(--muted)}.sources a{overflow-wrap:anywhere}.crumbs{font-size:.85rem;color:var(--muted);margin:0 0 10px}.crumbs ol{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:0 6px}.crumbs li+li:before{content:"\203a";margin-right:6px;color:#9aa5ad}.crumbs a{color:var(--muted)}.ad{overflow:hidden;text-align:center}.ad-content{margin-top:16px}.ad ins.adsbygoogle{display:block;min-height:250px}ins.adsbygoogle[data-ad-status=unfilled]{display:none!important}.footer{margin-top:24px;padding:18px;text-align:center;color:var(--muted);font-size:.9rem;border-top:1px solid var(--line)}.footer p{margin:0}.photo-gallery{display:inline-block;margin:0 8px 8px 0;vertical-align:top}.photo-gallery a{display:block;border-radius:10px;overflow:hidden;line-height:0;box-shadow:0 1px 3px #00000026;transition:transform .15s}.photo-gallery a:hover{transform:scale(1.03)}.photo-gallery img{width:128px;height:128px;object-fit:cover;display:block;margin:0}.lb{border:0;padding:0;background:transparent;max-width:min(96vw,1000px);max-height:96vh}.lb::backdrop{background:#000000d9}.lb figure{margin:0;position:relative}.lb img{display:block;max-width:min(96vw,1000px);max-height:88vh;width:auto;height:auto;border-radius:8px;background:#fff}.lb figcaption{color:#fff;text-align:center;padding:8px 44px;font-size:.95rem}.lb button{position:absolute;top:0;background:#00000073;color:#fff;border:0;border-radius:8px;width:40px;height:40px;font-size:24px;line-height:40px;cursor:pointer;margin:8px}.lb .lb-close{right:0}.lb .lb-prev{left:0;top:45%;font-size:30px}.lb .lb-next{right:0;top:45%;font-size:30px}.lb button:hover{background:#000000bf}@media (max-width:640px){.article table,.article tbody,.article tr,.article td{display:block;width:100%}.article thead{display:none}.article tr{border:1px solid var(--line);border-radius:10px;background:#f7fafc;padding:10px 12px;margin:0 0 10px}.article td{border:0;padding:2px 0}.article td[data-label]:before{content:attr(data-label) ": ";font-weight:700;font-size:.78rem;color:var(--muted)}.article img[style]{float:none!important;display:block;width:100%!important;max-width:420px;margin:0 auto 1em}h1{font-size:1.6rem}.hero .brand strong{font-size:1.85rem}}@media (min-width:900px){.page{padding:20px 20px 32px}.hero{min-height:200px}.hero .brand{padding:22px 26px 18px}.hero .brand strong{font-size:3.2rem}.nav-toggle{display:none}.layout{grid-template-columns:260px minmax(0,1fr);grid-template-rows:auto 1fr;grid-template-areas:"nav main" "side main";gap:20px;margin-top:20px}.sitenav{display:block!important;grid-area:nav}.sidebar{grid-area:side}.main{grid-area:main;min-width:0}.article{padding:26px 32px 32px}}@media (min-width:1200px){.layout{grid-template-columns:280px minmax(0,1fr)}}@media print{.hero,.sitenav,.sidebar,.ad,.nav-toggle{display:none!important}.article{box-shadow:none}}