@font-face{font-family:'Bricolage Grotesque';font-style:normal;font-weight:200 800;font-display:swap;src:url(/static/fonts/BricolageGrotesque.woff2) format('woff2')}
@font-face{font-family:'Public Sans';font-style:normal;font-weight:100 900;font-display:swap;src:url(/static/fonts/PublicSans.woff2) format('woff2')}
@font-face{font-family:'Public Sans';font-style:italic;font-weight:100 900;font-display:swap;src:url(/static/fonts/PublicSans-Italic.woff2) format('woff2')}
@font-face{font-family:'JetBrains Mono';font-style:normal;font-weight:400 700;font-display:swap;src:url(/static/fonts/JetBrainsMono.woff2) format('woff2')}

:root{
 --bg:#f6f2eb;--bg2:#ece6dc;--card:#fffdf9;--ink:#1b2430;--ink2:#4a5563;--mute:#6f6a62;--line:#ddd5c8;
 --acc:#d9481f;--acc-ink:#b23a16;--teal:#2f6f73;--dark:#1b2430;--dark2:#253141;--onDark:#f3eee6;
 --wall:#d8cfc2;--hole:#f6f2eb;--glue:#e9b77a;--air:#cfe3e4;
 --r:14px;--sh:0 1px 0 rgba(27,36,48,.04),0 8px 24px -12px rgba(27,36,48,.18);
 --ff:'Public Sans',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;--fh:'Bricolage Grotesque',var(--ff);--fm:'JetBrains Mono',ui-monospace,Menlo,monospace;
}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]){
 --bg:#141a22;--bg2:#1b232e;--card:#1e2733;--ink:#eee8de;--ink2:#c3bcb0;--mute:#9b958b;--line:#2e3846;
 --acc:#f07a4f;--acc-ink:#ff9a73;--teal:#7fc1c4;--dark:#0e131a;--dark2:#18202b;--onDark:#eee8de;
 --wall:#3a4452;--hole:#141a22;--glue:#a8783f;--air:#2c4a4d;--sh:0 8px 24px -12px rgba(0,0,0,.6)}}
:root[data-theme=dark]{--bg:#141a22;--bg2:#1b232e;--card:#1e2733;--ink:#eee8de;--ink2:#c3bcb0;--mute:#9b958b;--line:#2e3846;--acc:#f07a4f;--acc-ink:#ff9a73;--teal:#7fc1c4;--dark:#0e131a;--dark2:#18202b;--onDark:#eee8de;--wall:#3a4452;--hole:#141a22;--glue:#a8783f;--air:#2c4a4d}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:400 17.5px/1.65 var(--ff);overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:var(--acc-ink);text-underline-offset:3px;text-decoration-thickness:1.5px}
a:hover{color:var(--acc)}
h1,h2,h3{font-family:var(--fh);line-height:1.12;letter-spacing:-.015em;color:var(--ink);font-weight:750}
h1{font-size:clamp(2.1rem,5.2vw,3.5rem);margin:.2em 0 .25em}
h2{font-size:clamp(1.45rem,3vw,1.95rem);margin:2em 0 .5em}
h3{font-size:1.18rem;margin:1.4em 0 .4em}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}
.narrow{max-width:760px}
.mid{max-width:1000px}
.skip{position:absolute;left:-999px}.skip:focus{left:12px;top:12px;background:var(--card);padding:8px 12px;z-index:9}

/* header */
.hdr{background:var(--dark);color:var(--onDark);position:sticky;top:0;z-index:20;border-bottom:3px solid var(--acc)}
.hdr-in{display:flex;align-items:center;justify-content:space-between;height:64px;gap:20px}
.logo{display:flex;align-items:center;gap:10px;color:var(--onDark);text-decoration:none;font-family:var(--fh);font-size:1.12rem;letter-spacing:-.01em}
.logo b{color:var(--acc);font-weight:800;margin-left:.25em}
.logo .lg rect{fill:#2a3646}
.nav{display:flex;gap:4px}
.nav a{color:var(--onDark);text-decoration:none;font-size:.95rem;padding:8px 12px;border-radius:8px;opacity:.86}
.nav a:hover,.nav a[aria-current]{opacity:1;background:var(--dark2);color:#fff}
.mnav{display:none;position:relative}
.mnav summary{list-style:none;cursor:pointer;width:42px;height:42px;display:flex;flex-direction:column;justify-content:center;gap:5px;padding:0 10px}
.mnav summary::-webkit-details-marker{display:none}
.mnav summary span{display:block;height:2px;background:var(--onDark);border-radius:2px}
.mnav-p{position:absolute;right:0;top:52px;background:var(--dark);border:1px solid var(--dark2);border-radius:12px;padding:8px;min-width:220px;display:flex;flex-direction:column;box-shadow:0 18px 40px rgba(0,0,0,.35)}
.mnav-p a{color:var(--onDark);text-decoration:none;padding:10px 12px;border-radius:8px}
.mnav-p a:hover{background:var(--dark2)}
@media (max-width:920px){.nav{display:none}.mnav{display:block}}

/* hero */
.hero{background:var(--dark);color:var(--onDark);position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;inset:auto 0 0 0;height:40px;background:repeating-linear-gradient(-45deg,var(--acc) 0 14px,transparent 14px 28px);opacity:.9}
.hero-in{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center;padding-top:56px;padding-bottom:88px}
.hero h1{color:#fff;font-size:clamp(2.4rem,6vw,4.2rem)}
.hero .lead{color:#d9d3c8;font-size:1.2rem;max-width:36em}
.hero .kick{color:var(--acc)}
.hero-im .ph img{aspect-ratio:4/5;object-fit:cover;border-radius:18px}
.hero-im .ph figcaption{color:#9c968c}
@media (max-width:820px){.hero-in{grid-template-columns:1fr;gap:28px;padding-top:36px}.hero-im .ph img{aspect-ratio:16/10}}
.kick{display:inline-block;font:500 .78rem/1 var(--fm);text-transform:uppercase;letter-spacing:.08em;color:var(--acc-ink)}
.btns{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}
.btn{display:inline-block;background:var(--acc);color:#fff;text-decoration:none;font-weight:650;padding:13px 20px;border-radius:10px}
.btn:hover{background:#c13d17;color:#fff}
.btn-2{background:transparent;color:var(--onDark);border:1.5px solid #4a5768}
.btn-2:hover{background:var(--dark2);color:#fff}

/* blocks */
.blk{padding-top:56px;padding-bottom:56px}
.blk-h{display:flex;justify-content:space-between;align-items:baseline;gap:16px;flex-wrap:wrap;margin-bottom:22px}
.blk-h h2{margin:0}
.blk-h a,.more{font-weight:600;text-decoration:none}
.blk-h a::after,.more::after{content:" →"}
.band{background:var(--bg2)}
.band-d{background:var(--dark)}
.band-d h2{color:#fff}
.band-d .blk-h a{color:var(--acc)}
.two{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:start}
.two h2:first-child,.two .prose h2:first-child{margin-top:0}
@media (max-width:860px){.two{grid-template-columns:1fr;gap:20px}}

/* materials */
.mats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
@media (max-width:860px){.mats{grid-template-columns:repeat(2,1fr)}}
.mat{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:16px;text-decoration:none;color:var(--ink);display:flex;flex-direction:column;gap:3px;transition:transform .15s,box-shadow .15s}
.mat:hover{transform:translateY(-2px);box-shadow:var(--sh);color:var(--ink)}
.mat strong{font-family:var(--fh);font-size:1.1rem}
.mat span:last-child{font-size:.9rem;color:var(--mute)}
.sw{height:34px;border-radius:8px;margin-bottom:8px;background:#999}
.mat-beton .sw{background:radial-gradient(circle at 20% 30%,#9aa0a3 2px,transparent 3px),radial-gradient(circle at 70% 60%,#8a9093 3px,transparent 4px),#b8bcbd;background-size:22px 22px,30px 30px}
.mat-baksteen .sw{background:linear-gradient(#e7dccb 2px,transparent 2px) 0 0/100% 12px,linear-gradient(90deg,#e7dccb 2px,transparent 2px) 0 0/30px 24px,#b5523a}
.mat-kalkzandsteen .sw{background:linear-gradient(#cfc8bb 2px,transparent 2px) 0 0/100% 17px,#ebe6dc}
.mat-gasbeton .sw{background:radial-gradient(circle,#cfcac2 1.5px,transparent 2px) 0 0/8px 8px,#f1eee8}
.mat-gipsplaat .sw{background:linear-gradient(90deg,transparent 48%,#d8d4cc 48% 52%,transparent 52%),#fafaf7}
.mat-tegels .sw{background:linear-gradient(#c9d6d8 2px,transparent 2px) 0 0/100% 17px,linear-gradient(90deg,#c9d6d8 2px,transparent 2px) 0 0/17px 100%,#eef4f4}
.mat-hout .sw{background:repeating-linear-gradient(90deg,#c08a55 0 7px,#b07a47 7px 9px,#c99462 9px 16px)}
.mat-metaal .sw{background:linear-gradient(135deg,#9aa3ab,#dfe3e6 45%,#8e979f)}

/* types */
.types{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
@media (max-width:860px){.types{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.types{grid-template-columns:1fr}}
.type{background:var(--card);border-radius:var(--r);padding:20px;text-decoration:none;color:var(--ink);border:1px solid var(--line);position:relative}
.type h3{margin:.6em 0 .2em}.type p{margin:0;color:var(--ink2);font-size:.97rem}
.type:hover{border-color:var(--acc);color:var(--ink)}
.spec{font:500 .78rem/1 var(--fm);background:var(--dark);color:var(--onDark);padding:5px 8px;border-radius:6px}

/* cards */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
@media (max-width:860px){.cards{grid-template-columns:1fr 1fr}}
@media (max-width:540px){.cards{grid-template-columns:1fr}}
.cards-wide{margin:20px 0 10px}
.card{background:var(--card);border-radius:var(--r);overflow:hidden;text-decoration:none;color:var(--ink);border:1px solid var(--line);display:flex;flex-direction:column;transition:transform .15s,box-shadow .15s}
.card:hover{transform:translateY(-3px);box-shadow:var(--sh);color:var(--ink)}
.card-im{aspect-ratio:16/9;background:var(--bg2)}
.card-im img{width:100%;height:100%;object-fit:cover}
.card-tx{padding:14px 16px 18px}
.card h3{margin:.45em 0 .3em;font-size:1.12rem}
.card p{margin:0;color:var(--ink2);font-size:.93rem;line-height:1.5}
.band-d .card{border-color:var(--dark2)}
.prose .cards .card{text-decoration:none}

/* article */
.art{padding-top:26px}
.crumb{font-size:.88rem;color:var(--mute);display:flex;gap:7px;flex-wrap:wrap}
.crumb a{color:var(--mute)}
.lead{font-size:1.22rem;color:var(--ink2);line-height:1.55}
.meta{font:500 .82rem/1.4 var(--fm);color:var(--mute)}
.ph{margin:22px 0 4px}
.ph img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:16px;background:var(--bg2)}
.ph figcaption{font-size:.78rem;color:var(--mute);margin-top:6px}
.prose{padding-bottom:20px}
.prose ul,.prose ol{padding-left:1.25em}
.prose li{margin:.3em 0}
.prose strong{font-weight:650}
.tbl{overflow-x:auto;margin:1.2em 0;border:1px solid var(--line);border-radius:12px;background:var(--card)}
table{border-collapse:collapse;width:100%;font-size:.95rem}
th,td{text-align:left;padding:10px 14px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-family:var(--fm);font-weight:500;font-size:.78rem;text-transform:uppercase;letter-spacing:.05em;color:var(--mute);background:var(--bg2)}
tr:last-child td{border-bottom:0}
.rel{padding-bottom:64px}
.rel h2{margin-top:1.2em}

/* faq */
.faq{margin-top:2.4em}
.qa{border-top:1px solid var(--line);padding:4px 0}
.qa:last-child{border-bottom:1px solid var(--line)}
.qa summary{cursor:pointer;font-weight:650;padding:12px 28px 12px 0;list-style:none;position:relative}
.qa summary::-webkit-details-marker{display:none}
.qa summary::after{content:"+";position:absolute;right:4px;top:8px;font:500 1.4rem var(--fm);color:var(--acc)}
.qa[open] summary::after{content:"–"}
.qa p{margin:0 0 14px;color:var(--ink2)}

/* video */
.vid{margin:14px 0 24px}
.vid-btn{all:unset;display:block;position:relative;cursor:pointer;border-radius:14px;overflow:hidden;aspect-ratio:16/9;background:#111;width:100%}
.vid-btn img{width:100%;height:100%;object-fit:cover;opacity:.88}
.vid-btn:focus-visible{outline:3px solid var(--acc);outline-offset:3px}
.play{position:absolute;left:50%;top:50%;width:74px;height:52px;margin:-26px 0 0 -37px;background:var(--acc);border-radius:14px}
.play::after{content:"";position:absolute;left:30px;top:15px;border-left:20px solid #fff;border-top:11px solid transparent;border-bottom:11px solid transparent}
.vid-note{font-size:.8rem;color:var(--mute);margin:6px 0 0}
.vid iframe{width:100%;aspect-ratio:16/9;border:0;border-radius:14px;display:block}
.vblock h2{margin-top:1.4em}

/* diagram */
.diagram{margin:1.4em 0}
.fig{margin:0;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:18px}
.fig svg{width:100%;height:auto}
.fig figcaption{font-size:.85rem;color:var(--mute);margin-top:8px}
.f-ink{stroke:var(--ink)}.f-ink2{stroke:var(--mute)}.f-acc{stroke:var(--acc)}.f-accfill{fill:var(--acc)}.f-accfill2{fill:color-mix(in srgb,var(--acc) 22%,transparent)}
.f-fill{fill:var(--bg2)}.f-wall{fill:var(--wall);stroke:none}.f-hole{fill:var(--hole);stroke:none}.f-glue{fill:var(--glue);stroke:none}.f-air{fill:var(--air);stroke:var(--teal)}
.f-txt{fill:var(--ink2);font-family:var(--ff)}

/* tools */
.tool{background:var(--card);border:1px solid var(--line);border-left:5px solid var(--acc);border-radius:14px;padding:6px 22px 20px;margin:2em 0}
.tool h2{margin-top:.8em}
.tool fieldset{border:0;padding:0;margin:0 0 14px}
.tool legend{font-weight:650;margin-bottom:6px}
.tool label{display:inline-flex;align-items:center;gap:6px;margin:4px 14px 4px 0;font-size:.97rem}
.bd label{display:flex;justify-content:space-between;gap:12px;max-width:420px;margin:8px 0}
.bd input{width:90px;font:inherit;padding:6px 8px;border:1px solid var(--line);border-radius:8px;background:var(--bg);color:var(--ink)}
.kh-out,.bd-out{background:var(--bg2);border-radius:10px;padding:14px 16px;margin-top:8px}
.kh-out strong,.bd-out strong{font-family:var(--fh);font-size:1.15rem}
.kh-out p,.bd-out p{margin:.3em 0}

/* glossary */
.az{display:flex;flex-wrap:wrap;gap:6px;margin:1em 0}
.az a{font:500 .9rem var(--fm);background:var(--card);border:1px solid var(--line);border-radius:8px;padding:5px 10px;text-decoration:none}
.gl dt{font-weight:650;margin-top:12px}
.gl dd{margin:2px 0 0;color:var(--ink2)}

/* footer */
.ftr{background:var(--dark);color:#bdb6aa;padding:48px 0 26px;font-size:.95rem}
.ftr-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:28px}
@media (max-width:820px){.ftr-grid{grid-template-columns:1fr 1fr}}
.ftr h2{font-size:.82rem;font-family:var(--fm);text-transform:uppercase;letter-spacing:.07em;color:var(--onDark);margin:0 0 10px;font-weight:500}
.ftr a{display:block;color:#bdb6aa;text-decoration:none;padding:3px 0}
.ftr a:hover{color:#fff}
.logo-f{display:flex!important;margin-bottom:8px}
.ftr-b{border-top:1px solid #2c3746;margin-top:30px;padding-top:18px;font-size:.82rem}
.two>*,.prose{min-width:0}
.prose a{overflow-wrap:anywhere}
.logo .lg{width:38px;height:38px}
.ftr-grid>*{min-width:0}
@media (max-width:820px){.ftr-grid>div:first-child{grid-column:1/-1}}