/* Toolschlau – System-Schriften, keine externen Ressourcen */
:root{--bg:#fbfaf7;--fg:#1c1917;--muted:#57534e;--line:#e7e5e4;--brand:#0f766e;--brand-d:#115e59;--accent:#fbbf24;--card:#fff;--ad:#f0fdfa;--todo:#fff7ed;--todo-line:#fb923c;--imp:#fef2f2;--imp-line:#f87171;--max:46rem}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:1.0625rem/1.65 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}
a{color:var(--brand-d);text-underline-offset:.15em}
a:hover{color:var(--brand)}
img{max-width:100%;height:auto}
.wrap{max-width:72rem;margin:0 auto;padding:0 1.25rem}
.skip{position:absolute;left:-999px;top:0;background:#000;color:#fff;padding:.5rem 1rem;z-index:10}
.skip:focus{left:0}
.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:3.5rem}
.logo{display:flex;align-items:center;gap:.5rem;text-decoration:none;color:var(--fg);font-size:1.25rem;letter-spacing:-.01em}
.logo b{color:var(--brand)}
.main-nav{display:flex;gap:1.1rem;font-size:.95rem}
.main-nav a{text-decoration:none;color:var(--muted);font-weight:600}
.main-nav a:hover{color:var(--brand)}
main{padding:1.5rem 1.25rem 3rem}
.breadcrumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:.35rem;padding:0;margin:0 0 1rem;font-size:.85rem;color:var(--muted)}
.breadcrumbs li+li::before{content:"›";margin-right:.35rem}
.hero{max-width:var(--max);padding:2rem 0 1rem}
.eyebrow{color:var(--brand);font-weight:700;text-transform:uppercase;letter-spacing:.06em;font-size:.8rem;margin:0}
h1{font-size:clamp(1.7rem,4.5vw,2.5rem);line-height:1.18;letter-spacing:-.02em;margin:.3rem 0 .8rem}
h2{font-size:1.45rem;line-height:1.3;margin:2.2rem 0 .7rem;letter-spacing:-.01em}
h3{font-size:1.15rem;margin:1.6rem 0 .5rem}
.lead{font-size:1.15rem;color:var(--muted)}
.btn{display:inline-block;background:var(--brand);color:#fff;text-decoration:none;font-weight:700;padding:.7rem 1.2rem;border-radius:.6rem}
.btn:hover{background:var(--brand-d);color:#fff}
.cards{list-style:none;padding:0;margin:1rem 0;display:grid;gap:1rem;grid-template-columns:repeat(auto-fill,minmax(17rem,1fr))}
.card a{display:flex;flex-direction:column;gap:.4rem;height:100%;padding:1.1rem 1.2rem;background:var(--card);border:1px solid var(--line);border-radius:.8rem;text-decoration:none;color:var(--fg);transition:border-color .15s,box-shadow .15s}
.card a:hover{border-color:var(--brand);box-shadow:0 4px 18px rgba(15,118,110,.12)}
.card-kicker{font-size:.75rem;font-weight:700;color:var(--brand);text-transform:uppercase;letter-spacing:.05em}
.card-title{font-weight:700;font-size:1.08rem;line-height:1.35}
.card-desc{color:var(--muted);font-size:.95rem}
.card-meta{font-size:.8rem;color:var(--muted);margin-top:auto}
.principles .grid3{list-style:none;padding:0;display:grid;gap:1rem;grid-template-columns:repeat(auto-fit,minmax(14rem,1fr))}
.principles li{background:#fff;border:1px solid var(--line);border-radius:.8rem;padding:1rem 1.1rem;display:flex;flex-direction:column;gap:.3rem}
.principles span{color:var(--muted);font-size:.95rem}
.small{font-size:.9rem;color:var(--muted)}
.article{max-width:var(--max)}
.article-header .meta{color:var(--muted);font-size:.9rem;margin:0 0 1rem}
.toc{background:#fff;border:1px solid var(--line);border-radius:.8rem;padding:.8rem 1.2rem;margin:1rem 0 1.5rem;font-size:.95rem}
.toc-title{font-weight:700;margin:.2rem 0 .3rem}
.toc ol{margin:0;padding-left:1.2rem}
.prose p,.prose ul,.prose ol{margin:.8rem 0}
.prose li{margin:.25rem 0}
.prose code{background:#f5f5f4;padding:.1rem .3rem;border-radius:.25rem;font-size:.9em}
.prose hr{border:0;border-top:1px solid var(--line);margin:2rem 0}
.prose blockquote{margin:1rem 0;padding:.4rem 1rem;border-left:4px solid var(--brand);background:#fff;color:#292524}
.note{margin:1.2rem 0;padding:.7rem 1rem;border-radius:.6rem;border:1px solid}
.note p{margin:.3rem 0}
.note-ad{background:var(--ad);border-color:#99f6e4;font-size:.95rem}
.note-todo{background:var(--todo);border-color:var(--todo-line);border-style:dashed;font-size:.95rem}
.note-important{background:var(--imp);border-color:var(--imp-line)}
mark.placeholder{background:#fde68a;padding:0 .2rem;border-radius:.2rem}
.table-wrap{overflow-x:auto;margin:1rem 0;border:1px solid var(--line);border-radius:.6rem;background:#fff}
table{border-collapse:collapse;width:100%;font-size:.93rem}
th,td{padding:.5rem .6rem;border-bottom:1px solid var(--line);vertical-align:top;text-align:left}
th{background:#f5f5f4;font-weight:700}
tr:last-child td{border-bottom:0}
a.aff{font-weight:700}
a.aff-missing{outline:2px dashed var(--todo-line);outline-offset:2px}
.related{margin-top:2.5rem;border-top:1px solid var(--line);padding-top:.5rem}
input[type=checkbox]{margin-right:.4rem}
.site-footer{border-top:1px solid var(--line);background:#fff;padding:1.5rem 0;font-size:.9rem;color:var(--muted)}
.site-footer nav a{color:var(--muted)}
.footer-brand b{color:var(--fg)}
@media (max-width:40rem){body{font-size:1rem}.main-nav{gap:.8rem;font-size:.9rem}h2{font-size:1.3rem}main{padding-top:1rem}}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}