@import url('https://fonts.googleapis.com/css2?family=Geist:wght@400;500;600;700&display=swap');
:root{--paper:#f5f7f5;--surface:#fff;--ink:#13201a;--muted:#4a5750;--green:#217d50;--green-hover:#1a6541;--deep:#13492f;--pale:#edf8f2;--line:#dce3de;font:16px/1.6 Geist,system-ui,sans-serif;color:var(--ink);background:var(--paper)}
*{box-sizing:border-box}
body{margin:0;overflow-x:clip}
[hidden]{display:none!important}
a{color:var(--deep);text-decoration:none}
a:hover{text-decoration:underline}
:focus-visible{outline:2px solid var(--green);outline-offset:3px}
header{position:sticky;top:0;z-index:10;background:var(--surface);border-bottom:1px solid var(--line)}
.bar{max-width:1130px;margin:auto;padding:12px 24px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.bar img{display:block;object-fit:contain}
.controls,.langs,.audience summary,.audience a{display:flex;align-items:center;gap:8px}
.controls{gap:12px;min-width:0}
.icon{width:19px;height:19px;flex:none;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
details summary{cursor:pointer}
.audience{position:relative}
.audience summary{color:var(--deep);background:var(--pale);padding:8px 11px;border:1px solid #d7efe3;border-radius:10px;font-size:.875rem;font-weight:600;min-height:44px;list-style:none}
summary::-webkit-details-marker{display:none}
.audience summary>.audience-chevron{width:16px;height:16px;margin-left:3px}
.audience[open] .audience-chevron{transform:rotate(180deg)}
.audience div{position:absolute;right:0;top:calc(100% + 7px);min-width:176px;background:var(--surface);border:1px solid var(--line);padding:5px;border-radius:12px;box-shadow:0 12px 26px #13201a24}
.audience a{font-size:.875rem;padding:9px;border-radius:8px}
.audience a[aria-current],.audience a:hover{background:var(--pale)}
.langs{gap:2px;border:1px solid var(--line);padding:2px;background:var(--paper);border-radius:10px}
.langs a{display:grid;place-items:center;border-radius:7px;min-width:33px;min-height:38px;font-size:.75rem}
.langs a[aria-current]{background:var(--surface);box-shadow:0 1px 4px #13201a22;font-weight:700}
.hero{text-align:center;padding:clamp(34px,7vw,70px) 18px 56px;background:linear-gradient(to bottom,var(--paper) 30%,#f5f7f540 74%,var(--paper)),url('/assets/home-skyline.jpg') center bottom / cover no-repeat}
.hero p{display:inline-block;margin:0 0 10px;color:var(--deep);background:var(--pale);border:1px solid #d7efe3;padding:3px 12px;border-radius:50px;font-size:.85rem;font-weight:600}
h1,h2{font-family:inherit;line-height:1.1;margin:0 0 16px}
h1{font-size:clamp(32px,6vw,62px);letter-spacing:-.045em}
h2{font-size:clamp(21px,3vw,27px)}
.search{max-width:600px;margin:0 auto;display:flex;align-items:center;gap:12px;padding:6px 8px 6px 16px;background:var(--surface);color:var(--green);border:1px solid var(--line);border-radius:15px;box-shadow:0 8px 26px #13201a14}
.search input{border:0;min-width:0;flex:1;padding:9px 0;background:transparent;font:inherit;color:var(--ink)}
.search button{border:0;background:var(--green);color:white;border-radius:9px;width:44px;height:44px;font:inherit;cursor:pointer}
.search button:hover{background:var(--green-hover)}
.home-content,.results{max-width:940px;margin:0 auto;padding:0 24px 52px}
.home-content section+section{margin-top:28px}
.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.card{display:grid;grid-template-columns:1fr auto;gap:10px;padding:15px;min-height:116px;background:var(--surface);border:1px solid var(--line);border-radius:15px;box-shadow:0 4px 14px #13201a0c;transition:background .15s,border-color .15s}
.card:hover{background:var(--pale);border-color:#b1e2ca}
.card strong{grid-column:1/-1}
.card .icon{width:35px;height:35px;padding:8px;background:var(--pale);color:var(--green);border-radius:9px}
.rows,.topic-menu .topic-shell{background:var(--surface);border:1px solid var(--line);border-radius:13px;padding:0 15px}
.rows>a,.rows summary,.topic-menu summary,.related>a{display:block;padding:10px 0;min-height:44px}
.rows>a+a,.rows details+details,.related>a+a{border-top:1px solid var(--line)}
.rows li,.topic-menu li{padding:4px 0}
.guide-page{--guide-columns:minmax(195px,245px) minmax(0,680px);--guide-gap:clamp(18px,5vw,58px);max-width:1090px;margin:0 auto;padding:0 24px 50px}
.guide-page::before{content:"";position:absolute;inset:0 auto auto 50%;width:100vw;max-width:100dvw;transform:translateX(-50%);height:280px;z-index:-1;background:linear-gradient(to bottom,#f5f7f57a,var(--paper)),url("/assets/home-skyline.jpg") center / cover no-repeat}
.guide-page{position:relative;isolation:isolate}
.guide-search,.reading{display:grid;grid-template-columns:var(--guide-columns);gap:var(--guide-gap)}
.guide-search{padding:22px 0 26px}
.guide-search .search{grid-column:2;width:100%;max-width:none}
.reading{align-items:start}
.topic-menu .topic-shell{padding:13px 13px 7px}
.topic-shell>h2{font-size:1rem;line-height:1.5;margin:0 0 6px}
.topic-menu ul,.rows ul{list-style:none;padding:0;margin:0 0 8px}
.topic-menu ul{border-left:1px solid var(--line);padding-left:7px}
.topic-menu summary,.rows summary{display:flex;align-items:flex-start;justify-content:space-between;gap:9px;list-style:none}
.disclosure{width:8px;height:8px;margin:8px 4px 0 0;flex:none;border-right:2px solid var(--green);border-bottom:2px solid var(--green);transform:rotate(-45deg)}
details[open]>summary .disclosure{transform:rotate(45deg)}
.rows .guide-link,.related .guide-link,.topic-menu .guide-link{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:start;gap:9px;color:var(--green);font-weight:600}
.link-arrow{line-height:inherit}
.topic-menu .guide-link{font-size:.9rem;padding:6px 8px;border-radius:7px}
.topic-menu .guide-link[aria-current=page]{background:var(--pale);color:var(--deep)}
article{min-width:0;background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:clamp(16px,4vw,32px)}
article h1{font-size:clamp(29px,5vw,46px);margin:14px 0}
.crumb{color:var(--muted);font-size:.88rem}
.crumb a{color:var(--green);text-decoration:underline;text-underline-offset:3px}
.intro{color:var(--muted);font-size:1.12rem}
.steps{padding:0;margin:24px 0 0;list-style:none}
.steps li{display:grid;grid-template-columns:32px minmax(0,1fr);gap:13px;align-items:start;padding:10px 0}
.step-number{display:grid;place-items:center;width:32px;height:32px;border-radius:9px;background:var(--pale);color:var(--deep);font-weight:700}
.related{background:#f6fbf8;border:1px solid #e5f2e9;border-radius:13px;margin-top:28px;padding:17px}
.related h2{margin-bottom:5px}
.results{max-width:680px}
.guide-search+.results{padding-top:0}
.results>a{display:grid;gap:3px;padding:12px 14px;margin-bottom:8px;background:var(--surface);border:1px solid var(--line);border-radius:12px}
.results small,.results a>span{color:var(--muted)}
@media(max-width:700px){.guide-page{--guide-columns:minmax(0,1fr);--guide-gap:16px;padding-inline:16px}.guide-search .search{grid-column:1}}
@media(max-width:550px){.bar{padding:8px 12px;flex-wrap:wrap;gap:8px}.bar img{width:92.4px;height:auto}.controls{gap:6px}.audience summary{padding:6px 8px}.audience summary>.icon{width:15px}.hero{padding-bottom:32px}.cards{grid-template-columns:1fr}.card{grid-template-columns:auto 1fr auto;align-items:center;min-height:0;padding:10px}.card strong{grid-row:1;grid-column:2}.card>span{grid-column:3}.home-content,.results{padding-inline:16px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}
.correction{margin:0 0 12px;padding:9px 12px;background:var(--pale);color:var(--deep);border:1px solid var(--line);border-radius:9px;font:inherit;cursor:pointer}
.guide-screenshot{margin:24px 0 0}
.guide-screenshot img{display:block;width:100%;height:auto;border:1px solid var(--line);border-radius:12px}
.guide-screenshot figcaption{margin-top:8px;color:var(--muted);font-size:.875rem}