/* Chemikalie.net – Wissenschafts-CI. Tiefblau + Türkis. Mobile-first. */
*{box-sizing:border-box}
:root{
  --ink:#0f1b24;--ink2:#33475a;--mut:#5f7285;--line:#dde6ec;--line2:#eef3f7;
  --bg:#f7fafc;--card:#ffffff;--dark:#0a1926;--dark2:#122534;
  --accent:#0891b2;--accent2:#0e7490;--soft:#e6f7fb;
  --ring:rgba(8,145,178,.28);--rad:14px;
}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  line-height:1.65;font-size:17px;-webkit-font-smoothing:antialiased}
a{color:var(--accent2);text-decoration:none}
a:hover{text-decoration:underline}
.ch-shell{max-width:1080px;margin:0 auto;padding:0 20px}
.ch-main{display:block}
.ch-skip{position:absolute;left:-999px;top:0;background:#fff;padding:10px 16px;z-index:99}
.ch-skip:focus{left:8px;top:8px}

.ch-top{background:var(--dark);color:#fff;position:sticky;top:0;z-index:40}
.ch-top__in{display:flex;align-items:center;justify-content:space-between;height:62px}
.ch-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:1.14rem;letter-spacing:-.01em}
.ch-brand:hover{text-decoration:none}
.ch-brand__m{display:inline-flex;color:var(--accent)}
.ch-brand__t b{color:var(--accent);font-weight:800}
.ch-nav ul{list-style:none;display:flex;gap:2px;margin:0;padding:0}
.ch-nav a{color:#c3d3dd;padding:8px 12px;border-radius:9px;font-size:.92rem;font-weight:600}
.ch-nav a:hover{background:var(--dark2);color:#fff;text-decoration:none}
.ch-burger{display:none;flex-direction:column;gap:5px;background:none;border:0;padding:8px;cursor:pointer}
.ch-burger span{width:24px;height:2px;background:#fff;border-radius:2px}
@media(max-width:960px){
  .ch-burger{display:flex}
  .ch-nav{position:absolute;top:62px;left:0;right:0;background:var(--dark2);max-height:0;overflow:hidden;transition:max-height .25s ease}
  .ch-nav ul{flex-direction:column;gap:0;padding:6px 12px}
  .ch-nav a{display:block;padding:12px 10px;border-bottom:1px solid rgba(255,255,255,.06)}
  .ch-nav--open{max-height:420px}
}

.ch-art{background:var(--card);border:1px solid var(--line);border-radius:var(--rad);
  padding:34px;margin:26px 0 34px;box-shadow:0 1px 2px rgba(15,27,36,.04)}
.ch-art--narrow{max-width:760px}
.ch-head{border-bottom:1px solid var(--line2);padding-bottom:18px;margin-bottom:22px}
.ch-eyebrow{color:var(--accent2);font-weight:700;font-size:.8rem;letter-spacing:.08em;text-transform:uppercase;margin:0 0 6px}
.ch-art h1{font-size:1.95rem;line-height:1.2;margin:.1em 0 .3em;letter-spacing:-.02em}
.ch-lead{color:var(--ink2);font-size:1.08rem;margin:0}
.ch-art h2{font-size:1.4rem;margin:1.7em 0 .5em;letter-spacing:-.01em}
.ch-art h3{font-size:1.08rem;margin:1.2em 0 .3em}
.ch-art p{margin:.6em 0}

.ch-kpi{list-style:none;display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:22px 0;padding:0}
.ch-kpi li{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px}
.ch-kpi span{display:block;color:var(--mut);font-size:.78rem;text-transform:uppercase;letter-spacing:.04em;margin-bottom:4px}
.ch-kpi strong{font-size:1.02rem;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.ch-kpi--home li{background:var(--dark2);border-color:#1c3548;color:#fff}
.ch-kpi--home span{color:#8ba3b5}
@media(max-width:680px){.ch-kpi{grid-template-columns:repeat(2,1fr)}}

.ch-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px;margin:16px 0}
.ch-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:12px;padding:18px;color:var(--ink);transition:border-color .15s,box-shadow .15s,transform .15s}
.ch-card:hover{border-color:var(--accent);box-shadow:0 6px 18px rgba(15,27,36,.07);text-decoration:none;transform:translateY(-1px)}
.ch-card h3{margin:0 0 6px;font-size:1.02rem}
.ch-card p{margin:0 0 12px;color:var(--ink2);font-size:.94rem}
.ch-card__more{margin-top:auto;color:var(--accent2);font-weight:700;font-size:.85rem}
.ch-cards--mini{grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:10px}
.ch-card--mini{padding:12px 14px}
.ch-card--mini .ch-card__name{font-weight:700;font-size:.98rem;display:block}
.ch-card--mini .ch-card__meta{color:var(--mut);font-size:.8rem;display:block;margin-top:2px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}

.ch-chips{list-style:none;display:flex;flex-wrap:wrap;gap:8px;padding:0;margin:14px 0}
.ch-chips a{display:inline-block;background:#fff;border:1px solid var(--line);border-radius:999px;
  padding:6px 14px;font-size:.92rem;color:var(--ink2)}
.ch-chips a:hover{border-color:var(--accent);color:var(--accent2);text-decoration:none}
.ch-chips--wide a{border-radius:9px}

.ch-faq{margin:12px 0}
.ch-faq details{border:1px solid var(--line);border-radius:10px;padding:2px 16px;margin:8px 0;background:#fff}
.ch-faq summary{cursor:pointer;font-weight:600;padding:12px 0;list-style:none}
.ch-faq summary::-webkit-details-marker{display:none}
.ch-faq summary::before{content:"+";color:var(--accent);font-weight:700;margin-right:10px}
.ch-faq details[open] summary::before{content:"–"}
.ch-faq details>div{padding:0 0 12px}
.ch-faq p{margin:0;color:var(--ink2)}

/* Sicherheitshinweis: bewusst auffaellig, gelb */
.ch-safety{background:#fffbeb;border:1px solid #fde68a;border-left:4px solid #d97706;border-radius:12px;padding:16px 18px;margin:22px 0}
.ch-safety h3{margin:0 0 4px;font-size:1rem;color:#92400e}
.ch-safety p{margin:0}

.ch-source{background:#fff;border:1px dashed #a8cdd8;border-radius:12px;padding:16px 18px;margin:14px 0}
.ch-source h3{margin:0 0 8px;font-size:1rem}
.ch-source ul{margin:0;padding-left:18px}
.ch-source__note{color:var(--mut);font-size:.85rem;margin:10px 0 0}
.ch-def{background:var(--soft);border-radius:12px;padding:16px 18px;margin:16px 0}
.ch-def__l{color:var(--accent2);font-weight:700;font-size:.78rem;text-transform:uppercase;letter-spacing:.06em;margin:0 0 4px}
.ch-def p:last-child{margin:0}
.ch-disc{color:var(--mut);font-size:.9rem;border-top:1px solid var(--line2);margin-top:26px;padding-top:16px}

.ch-list{margin:10px 0;padding-left:20px}
.ch-list li{margin:5px 0}
.ch-dl{margin:14px 0}
.ch-dl dt{font-weight:600;margin-top:14px}
.ch-dl dd{margin:2px 0 0;color:var(--ink2)}

.ch-bc{margin:22px 0 2px}
.ch-bc ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;padding:0;margin:0;font-size:.86rem;color:var(--mut)}
.ch-bc li:not(:last-child)::after{content:"›";margin-left:6px;color:var(--line)}

.ch-btn{display:inline-block;background:var(--accent);color:#fff;font-weight:700;border-radius:10px;padding:11px 20px;font-size:.96rem}
.ch-btn:hover{background:var(--accent2);text-decoration:none}
.ch-btn--ghost{background:transparent;color:var(--accent2);border:1.5px solid var(--accent)}
.ch-btn--ghost:hover{background:var(--soft);color:var(--accent2)}
.ch-btn--big{padding:13px 26px;font-size:1.02rem}
.ch-h2{font-size:1.4rem;margin:1.7em 0 .5em;letter-spacing:-.01em}

.ch-az h2{font-size:1.3rem;color:var(--accent2);border-bottom:1px solid var(--line2);padding-bottom:4px}

.ch-hero{padding:34px 0 8px}
.ch-hero h1{font-size:2.3rem;line-height:1.15;letter-spacing:-.025em;margin:.1em 0 .35em}
.ch-hero__sub{font-size:1.12rem;color:var(--ink2);max-width:720px;margin:0}
.ch-hero__cta{margin-top:22px;display:flex;gap:12px;flex-wrap:wrap}
@media(max-width:760px){.ch-hero h1{font-size:1.8rem}.ch-art{padding:22px}}

.ch-foot{background:var(--dark);color:#a9bcc9;margin-top:40px;padding:36px 0 22px}
.ch-foot__grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:26px}
.ch-foot__brand{font-weight:800;font-size:1.15rem;color:#fff;margin:0 0 8px}
.ch-foot__brand b{color:var(--accent)}
.ch-foot p{margin:.3em 0;font-size:.92rem}
.ch-foot__h{color:#fff;font-weight:700;font-size:.82rem;text-transform:uppercase;letter-spacing:.05em;margin:0 0 8px}
.ch-foot ul{list-style:none;margin:0;padding:0}
.ch-foot ul li{margin:5px 0}
.ch-foot a{color:#a9bcc9}
.ch-foot a:hover{color:var(--accent)}
.ch-foot__bar{border-top:1px solid #1c3548;margin-top:24px;padding-top:16px}
.ch-foot__bar p{font-size:.85rem;color:#6f8494;margin:0}
@media(max-width:760px){.ch-foot__grid{grid-template-columns:1fr 1fr}}
@media(max-width:480px){.ch-foot__grid{grid-template-columns:1fr}}