:root{color-scheme:dark;--bg:#080c13;--paper:#101821;--ink:#eef4f7;--muted:#afbec9;--line:#2a3844;--green:#91e4bf;--mint:#91e4bf;--soft:#152b27;--rail:272px;font-family:Arial,Helvetica,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:108px}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.75 Arial,Helvetica,sans-serif}button,input{font:inherit}button,a,input,summary{touch-action:manipulation}a{color:var(--green);text-underline-offset:4px}a:hover{text-decoration-thickness:2px}button,summary{cursor:pointer}button{color:inherit}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid var(--mint);outline-offset:5px}::selection{background:#91e4bf;color:#10251e}h1,h2,h3,h4{line-height:1.15;letter-spacing:-.035em;text-wrap:balance}h1,h2{margin:0 0 24px}h2{font-size:clamp(28px,3.1vw,42px);max-width:25ch}h3{font-size:23px;margin:40px 0 16px}h4{font-size:18px;margin:28px 0 12px}p{margin:0 0 20px;text-wrap:pretty}p,li{max-width:72ch}strong{color:var(--ink)}ul,ol{padding-left:24px;margin:16px 0 28px}li{margin:10px 0}li::marker{color:var(--green)}[hidden]{display:none!important}.skip{position:fixed;top:8px;left:16px;transform:translateY(-150%);z-index:100;background:var(--mint);color:var(--bg);padding:12px 20px;border-radius:8px}.skip:focus{transform:none}
.topbar{height:80px;position:sticky;top:0;z-index:20;background:#080c13f2;backdrop-filter:blur(18px);border-bottom:1px solid var(--line);display:flex;align-items:center;gap:24px;padding:0 32px}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink);font-weight:700;letter-spacing:-.04em;font-size:21px;white-space:nowrap}.brand img{width:38px;height:38px;border-radius:10px}.site-return{font-size:13px;color:var(--muted);text-decoration:none;white-space:nowrap;padding:12px 0}.search-wrap{margin-left:auto;position:relative;max-width:390px;width:32vw}.search-wrap input{width:100%;padding:12px 94px 12px 16px;background:var(--paper);border:1px solid var(--line);border-radius:10px;color:var(--ink);font-size:14px;min-height:46px}.search-wrap input::placeholder{color:var(--muted)}kbd{font:11px ui-monospace,monospace;color:var(--muted);border:1px solid var(--line);border-radius:4px;padding:3px 6px}.search-wrap kbd{position:absolute;right:12px;top:13px;pointer-events:none}.plain-btn{border:1px solid var(--line);background:var(--paper);border-radius:10px;padding:11px 16px;color:var(--ink);font-size:13px;white-space:nowrap;min-height:46px}.plain-btn:hover{border-color:var(--green)}.menu-btn{display:none}.progress{height:2px;position:fixed;top:78px;left:0;z-index:25;background:var(--green);width:100%;transform:scaleX(0);transform-origin:left;pointer-events:none}
.shell{display:grid;grid-template-columns:var(--rail) minmax(0,1fr);max-width:1560px;margin:auto}.sidebar{border-right:1px solid var(--line);padding:28px 20px;height:calc(100dvh - 80px);position:sticky;top:80px;overflow-y:auto;scrollbar-width:thin;scrollbar-color:#415b56 transparent}.eyebrow{font:11px/1.6 ui-monospace,monospace;letter-spacing:.1em;text-transform:uppercase;color:var(--green);margin:0 0 18px}.sidebar .eyebrow{color:var(--muted);margin-left:10px}.platform-select{display:flex;gap:4px;background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:4px;margin-bottom:24px}.platform-select button{font-size:12px;background:transparent;color:var(--muted);border:0;min-height:40px;padding:8px;flex:1;border-radius:6px}.platform-select button[aria-pressed=true]{background:var(--mint);color:#10271d;font-weight:700}.toc{list-style:none;padding:0;margin:0}.toc li{margin:2px 0}.toc a{display:flex;gap:12px;align-items:baseline;color:var(--muted);text-decoration:none;font-size:13px;line-height:1.45;padding:10px;border-radius:8px}.toc a span{font:10px ui-monospace,monospace;color:#829b99}.toc a:hover,.toc a[aria-current=true]{background:var(--soft);color:var(--mint)}.rail-note{font-size:11px;line-height:1.65;color:var(--muted);margin:20px 10px}.offline-link{display:block;border-top:1px solid var(--line);padding:20px 10px 0;margin-top:24px;text-decoration:none;font-size:13px}.main{min-width:0;padding:36px clamp(24px,4vw,64px) 64px;max-width:1288px}
.hero{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:32px;align-items:center;padding:32px 0 44px;border-bottom:1px solid var(--line)}.hero-copy{min-width:0}.hero h1{font-size:clamp(42px,4.2vw,66px);line-height:1.04;letter-spacing:-.055em;margin-bottom:24px}.hero h1 em{font-style:normal;color:var(--mint)}.hero p:not(.eyebrow){color:var(--muted);font-size:17px;line-height:1.7;max-width:42ch}.hero-badges{display:flex;gap:8px 16px;flex-wrap:wrap;margin:24px 0;font-size:11px;color:var(--muted)}.hero-badges span+span:before{content:'·';margin-right:16px;color:var(--mint)}.hero-actions{display:flex;gap:10px;flex-wrap:wrap}.hero-actions a{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:12px 18px;border-radius:10px;background:var(--mint);color:#10271d;font-size:13px;font-weight:700;text-decoration:none}.hero-actions a+a{background:transparent;color:var(--ink);border:1px solid var(--line)}.hero-actions a:hover{filter:brightness(1.1)}.hero .hero-shots{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:0;align-items:start;max-width:420px}.hero-shots .shot{border-radius:24px;border:5px solid #293b40;box-shadow:0 22px 40px #03081099;margin:0}.hero-shots .shot:nth-child(2){margin-top:48px}.hero-shots .shot img{width:100%;height:auto}.hero-shots figcaption{padding:10px;font-size:11px;line-height:1.5}.hero-shots figcaption small{display:none}.hero-shots .shot-label{font-size:9px}.hero-shots .shot button:after{content:'↗';font-size:15px;padding:0 7px;bottom:8px}.summary-strip{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;padding:24px 0;border-bottom:1px solid var(--line);margin:0 0 30px}.summary-strip a{color:var(--ink);text-decoration:none;font-size:14px;line-height:1.5}.summary-strip strong{display:block;margin-bottom:6px}.summary-strip small{color:var(--muted);font-size:12px}.summary-strip a:hover strong{color:var(--mint)}
.chapter{padding:48px 0;margin:0;border-bottom:1px solid var(--line);scroll-margin-top:0}.chapter-num{font:11px/1.6 ui-monospace,monospace;letter-spacing:.08em;color:var(--green);margin-bottom:16px}.intro{color:var(--muted);font-size:19px;line-height:1.65;margin-bottom:28px;max-width:60ch}.chapter>p,.chapter>ul,.chapter>ol{color:#cad5df}.platform-block{margin:28px 0;padding:24px 28px;background:var(--paper);border-radius:14px;border-top:1px solid var(--line)}.platform-block h3:first-of-type{margin-top:16px}.platform-block>p:last-child{margin-bottom:0}.platform-label{display:inline-block;font:11px/1.6 ui-monospace,monospace;color:var(--mint);letter-spacing:.08em;text-transform:uppercase}.platform-label.ios{color:var(--mint)}.callout{padding:20px 24px;background:var(--soft);border:1px solid #385f51;border-radius:12px;margin:28px 0;font-size:15px;line-height:1.7}.callout p:last-child{margin:0}.callout strong:first-child{display:block;margin-bottom:8px}.callout.warning{background:#29241c;border-color:#655739;color:#e6d5b9}.callout.warning strong{color:#f1d7a7}.columns{display:grid;grid-template-columns:1fr 1fr;gap:24px}.columns>div{min-width:0}.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:12px;margin:28px 0;scrollbar-width:thin}table{width:100%;border-collapse:collapse;font-size:14px;line-height:1.65}th,td{padding:16px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}th{font-size:11px;letter-spacing:.07em;text-transform:uppercase;color:var(--muted);background:var(--paper)}td{color:#cad5df}tbody tr:last-child td{border:0}code,.path{font:13px/1.7 ui-monospace,monospace;background:var(--paper);color:#c6e8d9;padding:3px 6px;border-radius:5px;overflow-wrap:anywhere}.path{display:block;padding:14px 16px;margin:20px 0}.chip{background:#21322e;padding:2px 6px;border-radius:4px;font-size:.93em}
.shot-grid{display:grid;grid-template-columns:repeat(2,minmax(0,260px));justify-content:center;align-items:start;gap:28px;margin:36px auto;max-width:700px}.shot-grid.single{grid-template-columns:minmax(0,260px)}.shot{margin:0;border:1px solid var(--line);border-radius:18px;background:var(--paper);overflow:hidden}.shot button{display:block;width:100%;padding:0;border:0;background:#0b1016;position:relative;text-align:left}.shot img{display:block;width:100%;height:auto}.shot button:after{content:'↗ Vergrößern';position:absolute;bottom:12px;right:12px;border:1px solid #698579;border-radius:6px;padding:4px 10px;font-size:10px;color:var(--ink);background:#14231cf2}.shot button:hover:after{background:#2c493a}.shot button:focus-visible{outline-offset:-4px}.shot-label{font:10px/1.7 ui-monospace,monospace;text-transform:uppercase;color:var(--green);display:block;margin-bottom:5px}.shot figcaption{padding:16px;font-size:13px;line-height:1.65}.shot figcaption small{display:block;color:var(--muted);font-size:11px;margin-top:6px}.steps{list-style:none;padding:0}.steps>li{position:relative;padding:0 0 20px 44px;margin:0;min-height:44px}.steps>li>.step-num{position:absolute;left:0;top:0;width:28px;height:28px;background:var(--soft);border:1px solid #385f51;border-radius:8px;display:grid;place-items:center;color:var(--green);font-size:12px}.checklist{list-style:none;padding:0}.checklist li{padding-left:28px;position:relative}.checklist li:before{content:'✓';position:absolute;left:0;color:var(--green)}.details-stack details{border-bottom:1px solid var(--line);margin:0}.details-stack summary{padding:20px 4px;font-size:16px;font-weight:600;line-height:1.5}.details-stack summary::marker{color:var(--green)}.details-stack details[open] summary{color:var(--green)}.details-body{padding:0 4px 24px;color:var(--muted)}.details-body p:last-child{margin:0}.glossary{display:grid;grid-template-columns:1fr 1fr;gap:24px 32px}.glossary div{border-bottom:1px solid var(--line);padding-bottom:20px}.glossary dt{font-weight:700;font-size:16px}.glossary dd{margin:8px 0 0;color:var(--muted);font-size:14px}.section-end{font-size:14px;color:var(--muted);margin:32px 0 0}.platform-foot{font-size:13px;color:var(--muted)}.footer{font-size:12px;line-height:1.9;color:var(--muted);padding-top:32px;max-width:78ch}.footer strong{display:block;font-size:15px}.search-status{font-size:13px;color:var(--muted);min-height:0}.search-status:not(:empty){padding:16px 0}.search-clear{border:0;background:transparent;color:var(--green);text-decoration:underline;margin-left:12px;min-height:44px}.no-results{padding:24px 0}.backtop{position:fixed;bottom:20px;right:20px;z-index:10;border:1px solid var(--line);background:var(--paper);border-radius:12px;width:46px;height:46px;font-size:20px;color:var(--green);box-shadow:0 8px 24px #0006}dialog{border:1px solid var(--line);border-radius:18px;max-width:min(96vw,1000px);max-height:96dvh;padding:0;background:var(--bg);color:var(--ink);box-shadow:0 24px 100px #0008}dialog::backdrop{background:#04080de6;backdrop-filter:blur(6px)}.dialog-bar{display:flex;justify-content:space-between;gap:20px;align-items:center;padding:14px 18px;background:var(--paper)}.dialog-bar p{font-size:13px;margin:0;line-height:1.5}.dialog-tools{display:flex;gap:8px}.dialog-bar button{border:1px solid var(--line);background:transparent;color:var(--ink);border-radius:8px;padding:10px 12px;font-size:12px;min-height:44px;white-space:nowrap}.dialog-view{overflow:auto;max-height:calc(96dvh - 95px);text-align:center;padding:16px}.dialog-view img{display:block;max-width:100%;max-height:calc(90dvh - 120px);height:auto;width:auto;margin:auto}.dialog-view.zoomed img{max-height:none;max-width:none;width:var(--image-width,900px)}.print-only,.mobile-shade{display:none}
@media(hover:hover) and (pointer:fine){a,button{transition:background .18s,border-color .18s,color .18s}button:active,.hero-actions a:active{transform:translateY(1px)}}
@media(max-width:1150px){:root{--rail:244px}.main{padding:28px}.sidebar{padding:24px 12px}.hero{gap:24px;grid-template-columns:1fr}.hero .hero-shots{display:none}.hero h1{font-size:60px}.hero p:not(.eyebrow){max-width:50ch}.site-return{display:none}.hero{padding-top:16px}.hero-badges{margin:20px 0}.chapter{padding:36px 0}}
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@media(max-width:430px){.topbar .brand span{display:none}.topbar{gap:10px}.main{padding:24px 20px 48px}.hero h1{font-size:46px}.hero .eyebrow{font-size:10px;letter-spacing:.03em}.hero-actions{gap:8px}.hero-actions a{font-size:12px;padding:12px 15px}.hero-badges{gap:6px 10px;font-size:10px}.hero-badges span+span:before{margin-right:10px}.hero-shots .shot img{max-height:240px}.summary-strip{grid-template-columns:1fr;gap:0;padding:12px 0}.summary-strip a{padding:12px 0}.summary-strip strong{margin-bottom:3px}.summary-strip small{font-size:12px}.chapter h2{font-size:30px}.platform-block{padding:20px 16px}.shot-grid{grid-template-columns:minmax(0,260px)}.hero .hero-shots{grid-template-columns:1fr 1fr}.table-wrap th,.table-wrap td{min-width:115px;padding:12px}.dialog-bar button{font-size:11px}.callout{padding:16px}.chapter-num{font-size:10px}.steps>li{padding-left:40px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
/* Without scripts the chapter links remain available and the text is complete. */
@media(max-width:800px){html:not(.js-ready) .sidebar{position:static;transform:none;visibility:visible;width:auto;height:auto;border:0}html:not(.js-ready) .menu-btn{display:none}}
.hero .hero-shots figcaption{padding:10px;font-size:11px}.hero .hero-shots figcaption small{display:none}

.rail-return{display:block;font-size:12px;text-decoration:none;color:var(--muted);padding:4px 10px 20px}.rail-return:hover{color:var(--mint)}