/* Kellersanierung Hietzing — Swiss style: Helvetica, white, black, grey, one blue. Square edges, hairline rules. */
:root{
  --black:#0a0a0a; --white:#fff; --g1:#f4f4f4; --g2:#e4e4e4; --g3:#a3a3a3; --gt:#555;
  --blue:#0047bb; --blue-d:#00358c; --blue-l:#eaf0fb;
  --font:"Helvetica Neue",Helvetica,Arial,"Nimbus Sans","Liberation Sans",sans-serif;
  --w:1240px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:90px}
body{margin:0;font:400 17px/1.6 var(--font);color:var(--black);background:var(--white);-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--black)}
h1,h2,h3,.h3{font-family:var(--font);font-weight:700;line-height:1.08;letter-spacing:-.025em;color:var(--black);margin:0 0 .55em}
h1{font-size:clamp(2.3rem,5.4vw,4.4rem);letter-spacing:-.035em}
h2{font-size:clamp(1.7rem,3.2vw,2.6rem)}
h3,.h3{font-size:1.2rem;letter-spacing:-.01em;line-height:1.25}
p{margin:0 0 1em}
strong,b{font-weight:700}
.wrap{max-width:var(--w);margin:0 auto;padding:0 28px}
.narrow{max-width:860px}
.sr,.hp{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-999px;top:8px;background:var(--blue);color:#fff;padding:8px 14px;z-index:99}
.skip:focus{left:8px}
:focus-visible{outline:3px solid var(--blue);outline-offset:2px}
.small{font-size:.88rem;color:var(--gt)}
/* photos in greyscale — colour is reserved for blue */
main img{filter:grayscale(1) contrast(1.05)}

/* top line + header */
.topline{background:var(--black);color:#bdbdbd;font-size:.8rem;letter-spacing:.02em}
.topline .wrap{display:flex;justify-content:space-between;gap:12px;padding-top:8px;padding-bottom:8px}
.topline a{color:#fff;text-decoration:none}
.head{position:sticky;top:0;z-index:30;background:#dedede;border-bottom:1px solid var(--black)}
.head-in{display:flex;align-items:center;gap:20px;min-height:74px}
.logo{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--black);font-size:1.12rem;letter-spacing:-.02em;white-space:nowrap}
.logo svg{width:36px;height:36px}
.logo b{font-weight:700}
.logo span{font-weight:400}
#hauptnav{margin-left:auto}
#hauptnav ul{display:flex;gap:0;list-style:none;margin:0;padding:0}
#hauptnav a{display:block;white-space:nowrap;padding:26px 12px 24px;text-decoration:none;color:var(--black);font-weight:400;font-size:.95rem;border-bottom:3px solid transparent}
#hauptnav a:hover{color:var(--blue)}
#hauptnav a[aria-current=page]{font-weight:700;border-bottom-color:var(--blue)}
.menu-btn{display:none}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;font:700 1rem/1 var(--font);padding:17px 26px;border:0;border-radius:0;cursor:pointer;text-decoration:none;background:var(--black);color:#fff;transition:background .15s}
.btn::after{content:"→";font-weight:400}
.btn:hover{background:var(--blue);color:#fff}
.btn-gold{background:var(--blue);color:#fff}
.btn-gold:hover{background:var(--black);color:#fff}
.btn-small{padding:13px 18px;font-size:.92rem}
.btn-wide{width:100%;margin-top:12px}
.head-cta{margin-left:8px}
.link-btn{background:none;border:0;color:var(--gt);font:400 .95rem var(--font);cursor:pointer;padding:8px 0}
.link-btn:hover{color:var(--black)}
.crumbs{display:flex;gap:8px;font-size:.8rem;color:var(--gt);padding-top:16px;text-transform:uppercase;letter-spacing:.06em}
.crumbs a{color:var(--gt);text-decoration:none}
.crumbs a:hover{color:var(--blue)}

/* hero */
.hero{padding:64px 0 72px}
.hero-in{display:grid;grid-template-columns:7fr 5fr;gap:64px;align-items:start}
.kicker,.num{font:700 .78rem/1 var(--font);letter-spacing:.14em;text-transform:uppercase;color:var(--blue);margin-bottom:22px}
.num{display:inline-block;font-size:.85rem;letter-spacing:.06em;color:var(--black);border-top:3px solid var(--blue);padding-top:12px;min-width:48px}
.lead{font-size:1.22rem;line-height:1.55;color:#222;max-width:36em}
.lead em{font-style:normal;font-weight:700}
.ticks{list-style:none;padding:0;margin:28px 0 0;border-top:1px solid var(--black)}
.ticks li{padding:14px 0 14px 34px;border-bottom:1px solid var(--g2);position:relative}
.ticks li::before{content:"";position:absolute;left:0;top:23px;width:16px;height:3px;background:var(--blue)}
.hero-photo{position:relative;background:var(--black)}
.hero-photo img{width:100%;height:min(52vw,560px);object-fit:cover;opacity:.92}
.hero-photo p{position:absolute;left:0;right:0;bottom:0;margin:0 auto;color:#fff;font-size:.78rem;letter-spacing:.08em;padding-bottom:16px;text-transform:uppercase}

/* funnel */
.funnel{background:#fff;border:2px solid var(--black);padding:0 28px 0;position:sticky;top:100px}
.funnel-head{background:var(--g1);margin:0 -28px 22px;padding:24px 28px 2px;border-bottom:1px solid var(--g2)}
.funnel-kicker{font:700 .74rem var(--font);letter-spacing:.14em;text-transform:uppercase;color:var(--blue);margin:0 0 8px}
.funnel-title{font:700 1.5rem/1.15 var(--font);letter-spacing:-.02em;color:var(--black);margin:0 0 18px}
.funnel-bar{height:4px;background:#d6d6d6;overflow:hidden}
.funnel-bar span{display:block;height:100%;width:16%;background:var(--blue);transition:width .3s}
.funnel-count{font-size:.78rem;color:var(--gt);margin:10px 0 16px;text-transform:uppercase;letter-spacing:.08em}
.step{border:0;margin:0;padding:0;min-width:0;display:none}
.step.is-active{display:block;animation:in .2s ease}
@keyframes in{from{opacity:0}to{opacity:1}}
.step legend{font:700 1.08rem var(--font);margin-bottom:14px;padding:0}
.opt{display:block;margin:0 0 -1px;cursor:pointer;position:relative}
.opt input{position:absolute;opacity:0}
.opt span{display:block;padding:14px 16px 14px 48px;border:1px solid #c9c9c9;background:#fafafa;position:relative;transition:background .12s,border-color .12s}
.opt span::before{content:"";position:absolute;left:16px;top:50%;width:16px;height:16px;margin-top:-8px;border:1.5px solid var(--black);background:#fff}
.opt:hover span{background:var(--g2);z-index:1}
.opt input:checked+span{background:var(--blue);border-color:var(--blue);color:#fff;z-index:2}
.opt input:checked+span::before{border-color:#fff;background:#fff;box-shadow:inset 0 0 0 4px var(--blue)}
.opt input:focus-visible+span{outline:3px solid var(--black);outline-offset:-3px}
.fields{display:grid;gap:14px}
.fields label{display:grid;gap:6px;font-weight:700;font-size:.85rem}
.fields input,.fields select{font:400 1rem var(--font);padding:13px 14px;border:1px solid #c9c9c9;border-radius:0;background:#fafafa;color:var(--black);width:100%}
.fields input:focus,.fields select:focus{background:#fff;border-color:var(--blue);outline:2px solid var(--blue);outline-offset:-2px}
.consent{display:flex;gap:10px;font-size:.84rem;color:var(--gt);margin-top:16px;align-items:flex-start}
.consent input{margin-top:3px;width:18px;height:18px;flex:none;accent-color:var(--blue)}
.funnel-nav{display:flex;justify-content:space-between;align-items:center;margin:22px -28px 0;padding:14px 28px;background:var(--g1);border-top:1px solid var(--g2)}
.step[data-step="6"].is-active~.funnel-nav [data-next]{display:none}
.funnel-error{color:#b00020;font-weight:700;margin:0 -28px;padding:0 28px 16px;background:var(--g1);font-size:.92rem}
.funnel-done{text-align:left;padding:30px 0 24px}
.funnel-done svg{width:52px;height:52px;margin:0 0 18px}
.funnel.is-done>*:not(.funnel-done){display:none}

/* moisture scale */
.gauge-strip{background:#fff;border-bottom:1px solid var(--black)}
.gauge{display:grid;grid-template-columns:repeat(4,1fr) 1.5fr;align-items:stretch}
.gauge div{padding:22px 18px 20px 0;position:relative;border-right:1px solid var(--g2);margin-right:18px}
.gauge div::before{content:"";display:block;height:8px;margin-bottom:14px}
.gauge div:nth-child(1)::before{background:var(--g2)}.gauge div:nth-child(2)::before{background:#9db6e2}.gauge div:nth-child(3)::before{background:#4f7fd0}.gauge div:nth-child(4)::before{background:var(--blue-d)}
.gauge b{display:block;font-size:1rem}
.gauge span{font-size:.85rem;color:var(--gt)}
.gauge p{margin:0;padding:22px 0;font-size:.85rem;color:var(--gt);align-self:center}

/* sections */
.sec{padding:96px 0;border-top:1px solid var(--g2)}
.gauge-strip+.sec{border-top:0}
.sec-dark{background:var(--black);color:#d0d0d0;border-top:0}
.sec-dark h2,.sec-dark h3{color:#fff}
.sec-dark .num{color:#fff}
.sec-dark .intro{color:#bdbdbd;max-width:44em;font-size:1.1rem}
.sec-stone{background:var(--g1)}
.split{display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:start}
.cause-list{display:grid;grid-template-columns:1fr 1fr;gap:0;border-top:2px solid var(--black)}
.cause-list article{padding:24px 22px 24px 0;border-bottom:1px solid var(--g2)}
.cause-list article:nth-child(odd){border-right:1px solid var(--g2)}
.cause-list article:nth-child(even){padding-left:22px}
.cause-list h3{margin-bottom:.4em}
.cause-list h3::before{content:"";display:block;width:24px;height:3px;background:var(--blue);margin-bottom:14px}
.cause-list p{margin:0;color:var(--gt);font-size:.95rem}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:40px;margin-top:44px}
.card{color:#fff;text-decoration:none;display:flex;flex-direction:column;padding-top:28px;border-top:1px solid #444}
.card img{aspect-ratio:4/3;object-fit:cover;margin-bottom:24px;transition:filter .2s}
.card:hover img{filter:grayscale(0)}
.card h3{color:#fff;font-size:1.4rem}
.card p{color:#bdbdbd;font-size:.96rem}
.card:hover{color:#fff}
.more{font-weight:700;color:#fff;margin-top:auto;border-bottom:2px solid var(--blue);align-self:flex-start;padding-bottom:3px}
.more::after{content:" →";font-weight:400}
.arch-frame img{aspect-ratio:4/5;object-fit:cover;width:100%}
.steps-mini{counter-reset:s;list-style:none;padding:0;margin:28px 0;border-top:2px solid var(--black)}
.steps-mini li{counter-increment:s;display:flex;gap:16px;align-items:baseline;padding:14px 0;border-bottom:1px solid var(--g2)}
.steps-mini li::before{content:"0" counter(s);flex:none;font-weight:700;color:var(--blue);font-size:.9rem;width:28px}
.text-link{font-weight:700;color:var(--black);text-decoration:none;border-bottom:2px solid var(--blue);padding-bottom:2px}
.text-link::after{content:" →";font-weight:400}
.text-link:hover{color:var(--blue)}
.table-wrap{overflow-x:auto;margin-top:32px;border-top:2px solid var(--black)}
.matrix{border-collapse:collapse;width:100%;min-width:700px;font-size:.95rem;background:transparent}
.matrix th,.matrix td{padding:18px 20px 18px 0;text-align:left;vertical-align:top;border-bottom:1px solid var(--g3)}
.matrix thead th{font-size:.75rem;text-transform:uppercase;letter-spacing:.1em;color:var(--gt);font-weight:700}
.matrix tbody th{font-weight:700;width:30%}
.note{margin-top:26px;color:var(--gt)}
.dash{list-style:none;padding:0}
.dash li{position:relative;padding-left:26px;margin:8px 0}
.dash li::before{content:"";position:absolute;left:0;top:.75em;width:14px;height:2px;background:var(--blue)}
.before-after{display:grid;grid-template-columns:1fr 1fr;gap:4px}
.before-after figure{margin:0}
.before-after img{aspect-ratio:3/4;object-fit:cover}
.before-after figcaption{font-size:.78rem;color:var(--gt);margin-top:10px;text-transform:uppercase;letter-spacing:.08em}
.faq{border-top:2px solid var(--black)}
.faq details{border-bottom:1px solid var(--g3)}
.faq summary{cursor:pointer;list-style:none;padding:22px 50px 22px 0;font:700 1.12rem var(--font);letter-spacing:-.01em;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"";position:absolute;right:8px;top:50%;width:16px;height:2px;background:var(--blue)}
.faq summary::before{content:"";position:absolute;right:15px;top:50%;margin-top:-7px;width:2px;height:16px;background:var(--blue);transition:transform .15s}
.faq details[open] summary::before{transform:scaleY(0)}
.faq details p{color:#333;max-width:52em;padding-bottom:10px}
.band{background:var(--blue);color:#fff}
.band-in{display:flex;align-items:center;justify-content:space-between;gap:40px;padding-top:64px;padding-bottom:64px}
.band h2{color:#fff;margin-bottom:.3em}
.band p{margin:0;color:#dbe5f7;font-size:1.08rem}
.band .btn-gold{background:#fff;color:var(--black)}
.band .btn-gold:hover{background:var(--black);color:#fff}

/* inner pages */
.page-head{padding:52px 0 72px;border-bottom:1px solid var(--black)}
.page-head-in{display:grid;grid-template-columns:7fr 5fr;gap:64px;align-items:center}
.page-head-in:has(>:only-child){grid-template-columns:1fr}
.page-head-in:has(>:only-child) h1{max-width:16em}
.page-head .arch img{aspect-ratio:4/3;object-fit:cover;width:100%}
.head-actions{display:flex;flex-wrap:wrap;gap:28px;align-items:center;margin-top:16px}
.prose{max-width:880px}
.prose h2{margin-top:1.7em}
.prose h2:first-child{margin-top:0}
.two-col,.three-col{display:grid;gap:0;margin:28px 0;border-top:2px solid var(--black)}
.two-col{grid-template-columns:1fr 1fr}
.three-col{grid-template-columns:repeat(3,1fr)}
.box{padding:24px 24px 24px 0;border-bottom:1px solid var(--g2)}
.box+.box{padding-left:24px;border-left:1px solid var(--g2)}
.box p{margin:0;color:var(--gt);font-size:.96rem}
.steps{padding-left:0;list-style:none;counter-reset:st;border-top:2px solid var(--black)}
.steps li{counter-increment:st;display:grid;grid-template-columns:44px 1fr;padding:14px 0;border-bottom:1px solid var(--g2)}
.steps li::before{content:"0" counter(st);font-weight:700;color:var(--blue)}
figure.wide{margin:40px 0}
figure.wide img{aspect-ratio:16/8;object-fit:cover;width:100%}
.service-list{border-top:2px solid var(--black)}
.service-list article{display:grid;grid-template-columns:120px 1fr;gap:24px;padding:32px 0;border-bottom:1px solid var(--g3)}
.sl-num{font:700 2.8rem/1 var(--font);letter-spacing:-.04em;color:var(--blue)}
.service-list h2{font-size:1.55rem;margin-bottom:.4em}
.service-list p{margin:0;max-width:52em;color:#333}
.areas{display:grid;grid-template-columns:1fr 1fr;gap:0;margin:28px 0;border-top:2px solid var(--black)}
.areas article{padding:24px 24px 24px 0;border-bottom:1px solid var(--g2)}
.areas article:nth-child(even){padding-left:24px;border-left:1px solid var(--g2)}
.areas p{margin:0;color:var(--gt);font-size:.96rem}
.districts{line-height:2;color:var(--gt)}
.districts b{color:var(--blue)}
.timeline{list-style:none;padding:0;margin:0;max-width:920px;border-top:2px solid var(--black)}
.timeline li{display:grid;grid-template-columns:90px 1fr;gap:20px;padding:28px 0;border-bottom:1px solid var(--g3)}
.timeline li>span{font:700 2.6rem/1 var(--font);color:var(--blue);letter-spacing:-.04em}
.timeline h2{font-size:1.4rem;margin:.1em 0 .4em}
.timeline p{margin:0;color:#333}
.symptoms{display:grid;grid-template-columns:1fr 1fr;gap:0;border-top:2px solid var(--black)}
.symptoms article{padding:28px 28px 28px 0;border-bottom:1px solid var(--g2)}
.symptoms article:nth-child(even){padding-left:28px;border-left:1px solid var(--g2)}
.symptoms h2{font-size:1.3rem}
.symptoms p{margin:0 0 .5em;font-size:.96rem}
.values{background:var(--black);color:#d0d0d0;padding:36px 32px}
.values .h3{color:#fff}
.values ul{list-style:none;padding:0;margin:0 0 20px}
.values li{padding:12px 0;border-bottom:1px solid #333}
.values b{color:#fff}
.values a,.values .text-link{color:#fff}
.big-link{font:700 1.5rem var(--font);letter-spacing:-.02em;word-break:break-all;text-decoration:none;border-bottom:2px solid var(--blue)}
address{font-style:normal}
.roles{display:grid;grid-template-columns:1fr 1fr;gap:0;margin-bottom:28px;border-top:2px solid var(--black)}
.roles article{padding:24px 24px 24px 0;border-bottom:1px solid var(--g2)}
.roles article:nth-child(even){padding-left:24px;border-left:1px solid var(--g2)}
.roles h2{font-size:1.25rem;margin-top:0}
.roles p{margin:0;color:var(--gt)}
.jobs{border-top:2px solid var(--black)}
.jobs article{padding:20px 0;border-bottom:1px solid var(--g2)}
.jobs h3{margin-bottom:.25em}.jobs p{margin:0;color:var(--gt)}

/* footer */
.foot{background:var(--black);color:#a3a3a3;padding:80px 0 32px;font-size:.92rem}
.foot a{color:#fff;text-decoration:none}
.foot a:hover{color:#8fb0ea}
.foot-top{display:grid;grid-template-columns:1fr 2.4fr;gap:60px}
.logo-foot{font:700 1.5rem var(--font);letter-spacing:-.03em;color:#fff;margin-bottom:14px}
.foot address{margin-top:20px;line-height:1.7;padding-top:20px;border-top:1px solid #333}
.foot-links{display:grid;grid-template-columns:repeat(4,1fr);gap:28px}
.foot h3{font:700 .72rem var(--font);letter-spacing:.14em;text-transform:uppercase;color:#fff;margin-bottom:16px;padding-bottom:12px;border-bottom:2px solid var(--blue)}
.foot ul{list-style:none;padding:0;margin:0}
.foot li{margin:8px 0}
.foot-legal{margin:60px 0 0;padding-top:22px;border-top:1px solid #333;font-size:.8rem}

@media (max-width:1180px) and (min-width:981px){#hauptnav a{padding-left:8px;padding-right:8px;font-size:.9rem}.logo{font-size:1rem}}
@media (max-width:980px){
  .hero-in,.split,.page-head-in{grid-template-columns:1fr;gap:40px}
  .funnel{position:static}
  .cards,.three-col{grid-template-columns:1fr}
  .box+.box{padding-left:0;border-left:0}
  .gauge{grid-template-columns:repeat(4,1fr)}
  .gauge p{grid-column:1/-1;padding:0 0 18px}
  .foot-top{grid-template-columns:1fr}
  .foot-links{grid-template-columns:1fr 1fr}
  .head-cta{display:none}
  .menu-btn{display:block;margin-left:auto;width:46px;height:46px;border:1px solid var(--black);background:var(--g1);position:relative;cursor:pointer}
  .menu-btn>span:first-child,.menu-btn>span:first-child::before,.menu-btn>span:first-child::after{position:absolute;left:12px;width:20px;height:2px;background:var(--black);content:""}
  .menu-btn>span:first-child{top:22px}
  .menu-btn>span:first-child::before{left:0;top:-6px}
  .menu-btn>span:first-child::after{left:0;top:6px}
  #hauptnav{display:none;position:absolute;left:0;right:0;top:100%;background:var(--g1);border-bottom:1px solid var(--black);padding:6px 28px 18px}
  #hauptnav.open{display:block}
  #hauptnav ul{flex-direction:column}
  #hauptnav a{padding:14px 0;font-size:1.1rem;border-bottom:1px solid #d6d6d6}
  #hauptnav a[aria-current=page]{border-bottom:1px solid var(--blue)}
}
@media (max-width:640px){
  body{font-size:16px}
  .wrap{padding:0 20px}
  .sec{padding:64px 0}
  .hero{padding:40px 0 48px}
  .topline span{display:none}
  .two-col,.areas,.symptoms,.roles,.cause-list{grid-template-columns:1fr}
  .areas article:nth-child(even),.symptoms article:nth-child(even),.roles article:nth-child(even),.cause-list article:nth-child(even){padding-left:0;border-left:0}
  .cause-list article:nth-child(odd){border-right:0}
  .gauge{grid-template-columns:1fr 1fr}
  .band-in{flex-direction:column;align-items:flex-start}
  .service-list article,.timeline li{grid-template-columns:1fr;gap:8px}
  .funnel{padding:0 18px}
  .funnel-head,.funnel-nav,.funnel-error{margin-left:-18px;margin-right:-18px;padding-left:18px;padding-right:18px}
  .hero-photo img{height:64vw}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}