:root{--c:#0a5c4a;--c2:#08483a;--bg:#f6f8f7;--card:#fff;--t:#17201d;--m:#4a5753;--b:#d5dedb;--acc:#ffd166;--err:#a3141c;--r:10px;--w:1120px}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font:17px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;color:var(--t);background:var(--bg)}
a{color:var(--c)}a:hover{color:var(--c2)}
:focus-visible{outline:3px solid #1d6fd6;outline-offset:2px}
.skip{position:absolute;left:-999px;top:0;background:#fff;padding:8px 12px;z-index:9}.skip:focus{left:8px}
.wrap{max-width:var(--w);margin:0 auto;padding:0 16px}
header.site{background:var(--c);color:#fff}
header.site .wrap{display:flex;flex-wrap:wrap;align-items:center;gap:6px 24px;padding-top:10px;padding-bottom:10px}
.logo{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;font-weight:700;font-size:1.15rem}
.logo:hover{color:#fff}.logo svg{flex:none}
nav.main{flex:1 1 auto;min-width:0}
nav.main ul{list-style:none;margin:0;padding:0;display:flex;gap:4px 18px;overflow-x:auto;white-space:nowrap;scrollbar-width:thin}
nav.main a{color:#fff;text-decoration:none;font-size:.95rem;display:inline-block;padding:6px 0}
nav.main a:hover,nav.main a[aria-current]{text-decoration:underline;text-underline-offset:4px}
main{display:block;padding:20px 0 40px}
h1{font-size:1.9rem;line-height:1.25;margin:.2em 0 .4em}
h2{font-size:1.4rem;line-height:1.3;margin:1.6em 0 .5em}
h3{font-size:1.12rem;margin:1.3em 0 .3em}
p,ul,ol{margin:0 0 1em}
.crumbs{font-size:.88rem;color:var(--m);margin:0 0 6px}.crumbs ol{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:4px}
.crumbs li+li:before{content:"›";margin-right:4px;color:var(--m)}
.lead{font-size:1.08rem;color:var(--m);max-width:760px}
.grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:28px;align-items:start}
.card{background:var(--card);border:1px solid var(--b);border-radius:var(--r);padding:20px}
.calc{border-top:5px solid var(--c)}
.calc .f{margin:0 0 14px}
.calc label{display:block;font-weight:600;margin:0 0 4px}
.calc .in{display:flex;align-items:stretch;border:1px solid #8a9894;border-radius:8px;background:#fff;overflow:hidden}
.calc .in:focus-within{outline:3px solid #1d6fd6;outline-offset:1px}
.calc input,.calc select{font:inherit;color:inherit;width:100%;max-width:100%;min-width:0;min-height:46px;padding:8px 12px;border:0;background:transparent}
.calc input:focus,.calc select:focus{outline:none}
.calc select{border:1px solid #8a9894;border-radius:8px;background:#fff}
.calc select:focus{outline:3px solid #1d6fd6;outline-offset:1px}
.calc .u{display:flex;align-items:center;padding:0 12px;background:#eef2f1;color:var(--m);border-left:1px solid var(--b);white-space:nowrap}
.calc .hint{font-size:.85rem;color:var(--m);margin:4px 0 0}
.two{display:grid;grid-template-columns:1fr 1fr;gap:0 16px}
.btns{display:flex;gap:10px;flex-wrap:wrap;margin:6px 0 16px}
button,.btn{font:inherit;font-weight:600;border-radius:8px;padding:10px 18px;min-height:46px;cursor:pointer;border:2px solid var(--c);background:var(--c);color:#fff}
button:hover{background:var(--c2)}
button.sec{background:#fff;color:var(--c)}button.sec:hover{background:#eef5f3}
.result{background:#f0f7f5;border-radius:8px;padding:14px 16px;min-height:72px}
.result dl{margin:0}.result .r{display:flex;justify-content:space-between;gap:12px;padding:6px 0;border-bottom:1px solid #dce8e4}
.result .r:last-child{border-bottom:0}.result dt{color:var(--m)}.result dd{margin:0;font-weight:600;text-align:right;font-variant-numeric:tabular-nums}
.result .big dt{color:var(--t);font-weight:600}.result .big dd{font-size:1.45rem;color:var(--c2)}
.result .error{color:var(--err);font-weight:600;margin:0}.result .note,.muted{font-size:.88rem;color:var(--m);margin:.6em 0 0}
article{max-width:780px}
.tbl{overflow-x:auto;margin:0 0 1.2em}.tbl table{margin:0}
article table{border-collapse:collapse;width:100%;margin:0 0 1.2em;font-size:.95rem;background:#fff}
article th,article td{border:1px solid var(--b);padding:8px 10px;text-align:left;vertical-align:top}
article th{background:#eef2f1}
.formula{background:#fff;border-left:4px solid var(--acc);padding:10px 14px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.95rem;border-radius:0 8px 8px 0;overflow-x:auto}
.toc{font-size:.95rem}.toc ul{padding-left:18px;margin:0}
.faq h3{margin-top:1.1em}
aside .card{margin-bottom:18px}aside h2{font-size:1.1rem;margin:0 0 .6em}
.list{list-style:none;padding:0;margin:0}.list li{margin:0 0 8px}
.tiles{list-style:none;padding:0;margin:0 0 10px;display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px}
.tiles a{display:block;height:100%;background:#fff;border:1px solid var(--b);border-radius:var(--r);padding:14px 16px;text-decoration:none;color:var(--t)}
.tiles a:hover{border-color:var(--c);box-shadow:0 2px 8px rgba(0,0,0,.06)}
.tiles strong{display:block;color:var(--c);margin-bottom:2px}.tiles span{font-size:.92rem;color:var(--m)}
.hero{padding:10px 0 6px}
.search{margin:14px 0 24px;max-width:560px}
.search label{display:block;font-weight:600;margin-bottom:4px}
.search input{font:inherit;width:100%;min-height:50px;padding:10px 14px;border:2px solid var(--c);border-radius:10px}
.cat{margin-top:8px}.cat h2 a{text-decoration:none;color:var(--t)}.cat h2 a:hover{color:var(--c)}
.ad{display:none;margin:22px 0;min-height:120px;text-align:center}.ads-on .ad{display:block}
.ad small{display:block;font-size:.75rem;color:var(--m)}
.adsbygoogle{display:block}
footer.site{background:#13221e;color:#dfe7e4;font-size:.92rem;padding:28px 0}
footer.site a{color:#fff}
footer.site .cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:18px}
footer.site h2{font-size:1rem;margin:0 0 .5em;color:#fff}
footer.site ul{list-style:none;padding:0;margin:0}footer.site li{margin:0 0 4px}
footer.site .legal{border-top:1px solid #33463f;margin-top:20px;padding-top:14px;color:#c4d0cc}
.linkbtn{background:none;border:0;color:#fff;text-decoration:underline;padding:0;min-height:0;font-weight:400;cursor:pointer}
.linkbtn:hover{background:none}
#cookiebanner{position:fixed;left:12px;right:12px;bottom:12px;z-index:50;max-width:760px;margin:0 auto;background:#fff;border:2px solid var(--c);border-radius:12px;padding:16px 18px;box-shadow:0 6px 24px rgba(0,0,0,.18)}
#cookiebanner h2{font-size:1.1rem;margin:0 0 .3em}#cookiebanner p{font-size:.93rem;margin:0 0 .8em}
#cookiebanner .btns{margin:0}#cookiebanner button{flex:1 1 200px}
[hidden]{display:none!important}
@media (max-width:860px){.grid{grid-template-columns:minmax(0,1fr)}h1{font-size:1.6rem}}
@media (max-width:480px){body{font-size:16px}#cookiebanner{left:8px;right:8px;bottom:8px;padding:12px 14px}#cookiebanner p{font-size:.88rem}#cookiebanner button{min-height:44px;padding:8px 12px}.two{grid-template-columns:1fr}.card{padding:16px}header.site .wrap{gap:2px 16px}}
@media print{header.site,footer.site,aside,.ad,#cookiebanner{display:none}}
/* ---- 2026: taal, blog, keypad, bron, modernisering ---- */
:root{--sh:0 1px 2px rgba(16,40,34,.06),0 4px 14px rgba(16,40,34,.06);--sh2:0 10px 28px rgba(10,92,74,.14)}
header.site{background:linear-gradient(120deg,var(--c) 0%,#0c6b56 60%,#0e7a62 100%)}
.lang{flex:none;color:#fff;text-decoration:none;font-weight:600;font-size:.9rem;border:1.5px solid rgba(255,255,255,.7);border-radius:999px;padding:5px 14px;line-height:1.4}
.lang:hover{color:var(--c);background:#fff}
nav.langs{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:8px 10px;margin-left:auto;min-width:0}
.langmenu{flex:none;position:relative;font-size:.9rem;margin-left:auto}
.langmenu summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:6px;color:#fff;font-weight:600;border:1.5px solid rgba(255,255,255,.7);border-radius:999px;padding:5px 12px;line-height:1.4;min-height:34px}
.langmenu summary::-webkit-details-marker{display:none}
.langmenu summary::after{content:"";border:solid currentColor;border-width:0 2px 2px 0;padding:2.5px;transform:rotate(45deg);margin:-3px 2px 0 2px}
.langmenu[open] summary::after{transform:rotate(-135deg);margin-top:3px}
.langmenu summary:hover,.langmenu[open] summary{color:var(--c);background:#fff}
.langmenu summary:focus-visible{outline:3px solid #ffd54a;outline-offset:2px}
.langmenu ul{position:absolute;right:0;top:calc(100% + 6px);z-index:40;list-style:none;margin:0;padding:6px;min-width:190px;max-height:70vh;overflow-y:auto;background:#fff;border:1px solid #d6e2de;border-radius:10px;box-shadow:var(--sh2)}
.langmenu li a{display:flex;gap:10px;align-items:center;padding:8px 10px;border-radius:6px;color:var(--t);text-decoration:none}
.langmenu li a:hover,.langmenu li a:focus-visible{background:#eef6f3;color:var(--c)}
.langmenu li a[aria-current]{font-weight:700;color:var(--c)}
.langmenu li a[aria-current]::after{content:"✓";margin-left:auto}
.langmenu .code{display:inline-block;min-width:2.2em;font-size:.78rem;font-weight:700;color:#5a6b66}
.langbar{background:#fff7da;border-bottom:1px solid #f0d98a;font-size:.93rem}
.langbar .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:8px;padding-bottom:8px}
.langbar p{margin:0}.langbar a{font-weight:600}
.langbar .x{background:none;color:var(--t);border:0;font-size:1.5rem;line-height:1;min-height:40px;min-width:40px;padding:0 6px}
.langbar .x:hover{background:rgba(0,0,0,.06)}
.hero{position:relative;padding:22px 0 8px}
.hero h1{font-size:2.2rem;letter-spacing:-.01em}
.card,.tiles a,.posts a{box-shadow:var(--sh)}
.calc{box-shadow:0 2px 4px rgba(16,40,34,.05),0 12px 30px rgba(16,40,34,.08)}
.result{font-variant-numeric:tabular-nums;border:1px solid #d3e7e1}
.result .big dd{font-size:1.6rem;letter-spacing:-.01em}
.btn{display:inline-block;background:var(--c);color:#fff;text-decoration:none;border:2px solid var(--c)}
.btn:hover{background:var(--c2);color:#fff}
.calc textarea{font:inherit;width:100%;min-height:200px;padding:10px 12px;border:1px solid #8a9894;border-radius:8px;resize:vertical}
.calc textarea:focus{outline:3px solid #1d6fd6;outline-offset:1px}
.calc input[type=date],.calc input[type=time]{min-height:46px}
.keys{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:8px;margin:4px 0 14px}
.keys button{min-height:48px;padding:6px 4px;background:#fff;color:var(--t);border:1px solid var(--b);font-size:1.05rem}
.keys button:hover{background:#eef5f3}
.keys .op{color:var(--err,#b3261e)}.keys .eq{background:var(--c);color:#fff;border-color:var(--c);grid-column:span 2}
.keys .eq:hover{background:var(--c2)}
.src{margin:18px 0;font-size:.92rem;border-left:4px solid var(--acc)}
.src h2{font-size:1.05rem;margin:0 0 .4em}.src p{margin:0 0 .4em}.src ul{margin:0;padding-left:18px}
.weeks table{font-variant-numeric:tabular-nums}.weeks caption{text-align:left;font-weight:600;padding:0 0 6px}
.weeks tbody tr:nth-child(even){background:#f6f9f8}
.more{margin:10px 0 0;font-size:.95rem}
.rel-tools{margin-top:28px}.rel-tools h2,.rel-blogs h2{margin-top:0}
.rel-blogs{margin-top:22px}
.posts{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:12px}
.posts a{display:block;height:100%;background:#fff;border:1px solid var(--b);border-radius:var(--r);padding:14px 16px;text-decoration:none}
.posts strong{display:block;color:var(--c);margin-bottom:4px;line-height:1.35}.posts span{display:block;font-size:.9rem;color:var(--m)}
.post .meta{margin:-4px 0 10px}
.cta{margin:18px 0 24px;border-left:5px solid var(--c);background:linear-gradient(135deg,#fff 0%,#f0f7f5 100%)}
.cta h2{margin:0 0 .3em;font-size:1.2rem}.cta p:last-child{margin:0}
.picks{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:18px;margin:18px 0}
.pick h2{margin-top:0}.pick h2 a{text-decoration:none}
body.root main h1{font-size:2.3rem}
@media (prefers-reduced-motion:no-preference){
 html{scroll-behavior:smooth}
 .rv{opacity:0;transform:translateY(16px);transition:opacity .55s ease,transform .55s cubic-bezier(.2,.7,.2,1)}
 .rv.in{opacity:1;transform:none}
 .tiles li.rv:nth-child(3n+2),.posts li.rv:nth-child(3n+2){transition-delay:.07s}
 .tiles li.rv:nth-child(3n),.posts li.rv:nth-child(3n){transition-delay:.14s}
 .tiles a,.posts a,.card,button,.btn,.lang,.langmenu summary{transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease,background-color .2s ease,color .2s ease}
 .tiles a:hover,.posts a:hover{transform:translateY(-3px);box-shadow:var(--sh2);border-color:var(--c)}
 button:hover,.btn:hover{transform:translateY(-1px)}
 button:active,.btn:active{transform:translateY(0) scale(.98)}
 .keys button:hover{transform:none}
 .result.anim dl,.result.anim .note{animation:rt-in .45s ease both}
 .result.anim .big dd{animation:rt-pop .6s cubic-bezier(.2,.8,.3,1.25) both}
 .result.anim{animation:rt-glow 1s ease}
 @keyframes rt-in{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
 @keyframes rt-pop{0%{transform:scale(.94)}60%{transform:scale(1.04)}100%{transform:none}}
 @keyframes rt-glow{0%{box-shadow:0 0 0 0 rgba(10,92,74,.25)}100%{box-shadow:0 0 0 12px rgba(10,92,74,0)}}
}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
@media (max-width:600px){.hero h1{font-size:1.75rem}.keys{gap:6px}.keys button{min-height:46px}.lang,.langmenu summary{padding:4px 11px}nav.langs{gap:6px}}
.calc .ct{margin-top:0}
.ext{margin:18px 0;padding:14px 18px;border-left:4px solid var(--c)}.ext a{text-decoration:none}.ext strong{color:var(--c)}.ext span{display:block;font-size:.9rem;color:var(--m)}
/* nieuws */
.posts.news{grid-template-columns:1fr}
.posts .nmeta{display:block;font-size:.8rem;color:var(--m);margin-bottom:4px}
.empty-news{padding:18px 20px;color:var(--m)}
.news-src{padding:12px 16px;margin-top:24px}
.pager{display:flex;justify-content:space-between;align-items:center;gap:12px;margin:20px 0}
.rss a{font-size:.9rem}
html:not(.js) .search{display:none}
/* resultaattabel en kopieerknop */
.result .rtbl{margin:12px 0 0;max-height:420px;overflow:auto}
.result .rtbl table{font-size:.9rem}
.result .rtbl td,.result .rtbl th{white-space:nowrap}
.copyrow{margin:10px 0 0}
.result dd,.result td,.result .copy{overflow-wrap:anywhere}
.result .big dt{flex:1 1 0}
mark.todo{background:#fff3cd;color:#5c3b00;padding:.1em .35em;border:1px dashed #b07d00;border-radius:4px}