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h1{font-size:var(--font-size-2xl)}.hero .hero-subtitle{font-size:var(--font-size-base)}}.source-note{font-size:var(--font-size-xs);color:var(--text-muted);font-style:italic;margin-top:var(--space-2)}@media(max-width:768px){.main-nav{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:var(--surface-header);flex-direction:column;padding:80px var(--space-6) var(--space-8);z-index:999;overflow-y:auto;gap:var(--space-1);animation:slideIn .3s ease}@keyframes slideIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.main-nav.open{display:flex}.main-nav a{padding:var(--space-4) var(--space-5);font-size:var(--font-size-md);border-radius:var(--radius-md);border-bottom:1px solid rgba(255,255,255,.08)}.main-nav .btn{margin-left:0!important;margin-top:var(--space-3);justify-content:center;width:100%;padding:var(--space-4) var(--space-6)}.nav-toggle{display:block;z-index:1000;font-size:1.5rem;padding:var(--space-2) var(--space-3)}.site-header 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rgba(255,255,255,.1);padding-top:var(--space-6);display:flex;justify-content:space-between;align-items:center;font-size:var(--font-size-xs)}@media(max-width:768px){.footer-grid{grid-template-columns:1fr 1fr}.footer-bottom{flex-direction:column;gap:var(--space-3);text-align:center}}@media(max-width:480px){.footer-grid{grid-template-columns:1fr}}.link-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:var(--space-4);margin:var(--space-6) 0}.link-card{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-4) var(--space-5);background-color:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);text-decoration:none;color:var(--text-main);transition:all .2s ease;box-shadow:0 2px 4px #00000005;position:relative;overflow:hidden}a.link-card[href*=-koeln],a.link-card[href*=-duesseldorf],a.link-card[href*=-dortmund],a.link-card[href*=-essen],a.link-card[href*=-duisburg],a.link-card[href*=-bochum],a.link-card[href*=-bonn],a.link-card[href*=-wuppertal],a.link-card[href*=-aachen],a.link-card[href*=-muenster],a.link-card[href*=-bielefeld],a.link-card[href*=-gelsenkirchen],a.link-card[href*=-moenchengladbach]{background-image:url(../skyline.svg);background-size:contain;background-position:bottom right;background-repeat:no-repeat;opacity:.8}.link-card:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(to right,#fff 40%,#ffffffb3);z-index:1}.file-upload-wrapper{position:relative;margin-bottom:var(--space-3)}.file-input{position:absolute;width:.1px;height:.1px;opacity:0;overflow:hidden;z-index:-1}.file-label{display:flex;align-items:center;gap:var(--space-2);padding:var(--space-3) 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0;background:linear-gradient(135deg,var(--color-gray-900) 0%,#1a1c21 100%);color:var(--color-white);position:relative;overflow:hidden}.rechner-section:before{content:"";position:absolute;top:-50%;right:-20%;width:600px;height:600px;background:radial-gradient(circle,rgba(255,131,0,.05) 0%,transparent 70%);border-radius:50%;pointer-events:none}.rechner-card{background:#fff;border:1px solid rgba(255,255,255,.05);border-radius:var(--radius-xl);padding:var(--space-8);box-shadow:var(--shadow-xl);color:#334155}@media(max-width:768px){.rechner-card{padding:var(--space-4)}}.rechner-header{text-align:center;margin-bottom:var(--space-8)}.rechner-header h2{color:var(--color-primary);display:flex;align-items:center;justify-content:center;gap:var(--space-2);margin-bottom:var(--space-2);font-weight:800}.rechner-header p{color:var(--text-secondary);max-width:600px;margin:0 auto}.rechner-row{display:grid;grid-template-columns:1fr 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var(--border-light);border-radius:var(--radius-lg);min-height:280px;padding:var(--space-4);position:relative}.house-svg{width:100%;height:auto;max-width:320px}.guide-line{fill:none;stroke:#94a3b8;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;transition:all .3s ease}.guide-line.is-active{stroke:var(--color-primary)!important;stroke-width:5!important;filter:drop-shadow(0 0 8px var(--color-primary-light))}.guide-text{font-family:inherit;font-size:14px;font-weight:700;fill:#64748b}.guide-text.is-active{fill:var(--color-primary)}.rechner-measures{border-top:1px solid var(--border);padding-top:var(--space-6)}.step-desc{color:var(--text-secondary);font-size:.875rem;margin-bottom:var(--space-4)}.dimension-tabs{display:flex;gap:var(--space-2);margin-bottom:var(--space-6);overflow-x:auto;padding-bottom:var(--space-2)}.tab-btn{padding:var(--space-2) var(--space-4);background:var(--color-gray-100);border:2px solid #94a3b8;border-radius:var(--radius-full);font-size:.875rem;font-weight:600;color:#64748b;cursor:pointer;white-space:nowrap;transition:all .2s}.tab-btn.active{background:var(--color-primary);color:var(--color-white);border-color:var(--color-primary)}.tab-btn:hover:not(.active){background:var(--color-gray-200)}.dimension-pane{display:none;animation:fadeIn .3s ease}.dimension-pane.active{display:block}@keyframes fadeIn{0%{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}.dimension-pane .grid{display:grid;gap:var(--space-6)}.grid--2{grid-template-columns:1fr 400px}@media(max-width:992px){.grid--2{grid-template-columns:1fr}}.form-inputs{display:flex;flex-direction:column;gap:var(--space-4)}.enable-checkbox{display:inline-flex;align-items:center;gap:12px;cursor:pointer;-webkit-user-select:none;user-select:none;margin-bottom:var(--space-2)}.enable-checkbox input{position:absolute;opacity:0;width:0;height:0}.checkbox-box{display:inline-block;width:44px;min-width:44px;height:24px;background:#cbd5e1;border-radius:100px;position:relative;transition:all .3s ease;border:1px solid #94a3b8!important;vertical-align:middle}.checkbox-box:after{content:"";width:18px;height:18px;border-radius:50%;background:#fff;box-shadow:0 2px 4px #0003;position:absolute;top:2px;left:2px;transition:all .3s cubic-bezier(.4,0,.2,1)}.enable-checkbox input:checked+.checkbox-box{background:#10b981!important;border-color:#059669!important}.enable-checkbox input:checked+.checkbox-box:after{transform:translate(20px)}.enable-checkbox:hover .checkbox-box{border-color:var(--color-primary)!important}.form-inputs.disabled .input-group{opacity:.5;pointer-events:none}.input-group label{display:block;font-weight:600;margin-bottom:var(--space-1);color:#475569;font-size:.9rem}.input-wrapper{display:flex;align-items:stretch;border:2px solid #94a3b8;border-radius:var(--radius-md);overflow:hidden;transition:border-color .2s;height:46px;background:#fff}.input-wrapper:focus-within{border-color:var(--color-primary)}.input-wrapper input{flex:1;border:none!important;border-radius:0!important;padding:0 var(--space-3)!important;font-size:1rem;color:#1e293b;height:100%}.input-wrapper .unit{background:var(--color-gray-100);padding:0 var(--space-4);display:flex;align-items:center;font-weight:700;color:#64748b;border-left:1px solid var(--border);font-size:.9rem}.dimension-visual{background:#f8fafc;border-radius:var(--radius-lg);display:flex;align-items:center;justify-content:center;padding:var(--space-4);border:2px solid #94a3b8}.dimension-visual img{max-width:100%;height:auto}.rechner-actions{border-top:1px solid var(--border);padding-top:var(--space-6);text-align:center}.rechner-note{font-size:.875rem;color:var(--text-secondary);margin-top:var(--space-2)}.dimension-container{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-8);align-items:flex-start}@media(max-width:992px){.dimension-container{grid-template-columns:1fr}}.dimension-visual{display:flex;align-items:center;justify-content:center;min-height:380px;background:#f1f5f9;border-radius:var(--radius-lg);border:1px solid #e2e8f0;overflow:hidden;position:sticky;top:100px;padding:var(--space-8)}.house-3d-scene{width:300px;height:300px;perspective:1200px;display:flex;align-items:center;justify-content:center}.house-3d{width:210px;height:135px;position:relative;transform-style:preserve-3d;transition:transform 1.5s cubic-bezier(.34,1.56,.64,1);transform:rotateX(-15deg) rotateY(0)}.house-3d.show-vorne{transform:rotateX(-15deg) rotateY(0)}.house-3d.show-rechts{transform:rotateX(-15deg) rotateY(-90deg)}.house-3d.show-hinten{transform:rotateX(-15deg) rotateY(-180deg)}.house-3d.show-links{transform:rotateX(-15deg) rotateY(-270deg)}.house-3d .face{position:absolute;top:50%;left:50%;background:#fee2e2;border:2px solid #334155;transition:background-color .4s ease;display:flex;align-items:center;justify-content:center;backface-visibility:visible;box-shadow:inset 0 0 20px #0f172a0d}:root{--h3d-w: 210px;--h3d-h: 135px;--h3d-d: 210px}.house-3d .face-front{width:var(--h3d-w);height:var(--h3d-h);margin-left:calc(var(--h3d-w) / -2);margin-top:calc(var(--h3d-h) / -2);transform:translateZ(calc(var(--h3d-d) / 2))}.house-3d .face-back{width:var(--h3d-w);height:var(--h3d-h);margin-left:calc(var(--h3d-w) / -2);margin-top:calc(var(--h3d-h) / -2);transform:translateZ(calc(var(--h3d-d) / -2)) rotateY(180deg)}.house-3d .face-left{width:var(--h3d-d);height:var(--h3d-h);margin-left:calc(var(--h3d-d) / -2);margin-top:calc(var(--h3d-h) / -2);transform:translate(calc(var(--h3d-w) / -2)) rotateY(-90deg)}.house-3d .face-right{width:var(--h3d-d);height:var(--h3d-h);margin-left:calc(var(--h3d-d) / -2);margin-top:calc(var(--h3d-h) / -2);transform:translate(calc(var(--h3d-w) / 2)) rotateY(90deg)}.house-3d .face-bottom{width:var(--h3d-w);height:var(--h3d-d);margin-left:calc(var(--h3d-w) / -2);margin-top:calc(var(--h3d-d) / -2);transform:translateY(calc(var(--h3d-h) / 2)) rotateX(90deg);background:#cbd5e1;border:1px solid #94a3b8}.face:after{content:"";position:absolute;width:36px;height:45px;background:#e0f2fe;border:1px solid #bae6fd;border-radius:2px}.face-front:after{top:30px;left:30px;box-shadow:105px 0 #e0f2fe}.face-back:after{top:30px;left:30px;box-shadow:105px 0 #e0f2fe}.face-left:after{top:30px;left:30px;box-shadow:105px 0 #e0f2fe}.face-right:after{top:30px;left:30px;box-shadow:105px 0 #e0f2fe}.roof{position:absolute;top:50%;left:50%;width:0;height:0;transform:translateY(calc(var(--h3d-h) / -2));transform-style:preserve-3d}.roof-gable{position:absolute;transform-style:preserve-3d;display:block}.roof-gable .roof-face{position:absolute;background:#475569;border:3px solid #1e293b;width:255px;height:180px;left:-127.5px;top:-157.5px;transform-origin:bottom center;transform-style:preserve-3d}.roof-gable .roof-front{transform:translateZ(127.5px) rotateX(45deg)}.roof-gable .roof-back{transform:translateZ(-127.5px) rotateX(-45deg)}.roof-gable .gable-end{position:absolute;width:0;height:0;border-left:105px solid transparent;border-right:105px solid transparent;border-bottom:105px solid #fee2e2;left:-105px;top:-105px;transform-style:preserve-3d;transition:border-bottom-color .4s ease}.roof-gable .gable-left{transform:translate(-105px) rotateY(-90deg)}.roof-gable .gable-right{transform:translate(105px) rotateY(90deg)}.roof-flat{position:absolute;width:240px;height:240px;left:-120px;top:-120px;background:#64748b;transform:translateY(-3px) rotateX(90deg);border:3px solid #334155;display:none;transform-style:preserve-3d}.roof-trapez{position:absolute;transform-style:preserve-3d;display:none}.roof-trapez .trap-face{position:absolute;background:#475569;height:180px;top:-157.5px;transform-origin:bottom center;transform-style:preserve-3d}.roof-trapez .trap-front,.roof-trapez .trap-back,.roof-trapez .trap-left,.roof-trapez .trap-right{width:255px;left:-127.5px;clip-path:polygon(50% 0,100% 100%,0% 100%)}.roof-trapez .trap-left,.roof-trapez .trap-right{background:#334155}.roof-trapez .trap-front{transform:translateZ(127.5px) rotateX(45deg)}.roof-trapez .trap-back{transform:translateZ(-127.5px) rotateX(-45deg)}.roof-trapez .trap-left{transform:translate(-127.5px) rotateY(-90deg) rotateX(45deg)}.roof-trapez .trap-right{transform:translate(127.5px) rotateY(90deg) rotateX(45deg)}.roof-trapez .trap-top,body.roof-type-flachdach .roof-gable{display:none}body.roof-type-flachdach .roof-flat{display:block}body.roof-type-trapez .roof-gable{display:none}body.roof-type-trapez .roof-trapez{display:block}.house-3d.scaffold-vorne .face-front,.house-3d.scaffold-hinten .face-back,.house-3d.scaffold-links .face-left,.house-3d.scaffold-rechts .face-right{background:#dcfce7}.house-3d.scaffold-links .roof-gable .gable-left,.house-3d.scaffold-rechts 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span{position:absolute;right:-15px;writing-mode:vertical-rl;transform:rotate(180deg)}.dim-firsthoehe{right:-37.5px;bottom:0;width:15px;height:calc(100% + 105px);border-right:1px dashed #ef4444;border-top:1px solid #ef4444;border-bottom:1px solid #ef4444}.dim-firsthoehe span{position:absolute;right:-15px;top:50%;writing-mode:vertical-rl;transform:translateY(-50%) rotate(180deg)}body.roof-type-flachdach .dim-firsthoehe,body.roof-type-trapez .dim-firsthoehe{display:none}body:not(.roof-type-flachdach):not(.roof-type-trapez) .face-right .dim-height,body:not(.roof-type-flachdach):not(.roof-type-trapez) .face-left .dim-height{display:none}.scaffold-left{width:calc(var(--h3d-d) + 10px);height:var(--h3d-h);margin-left:calc((var(--h3d-d) + 10px) / -2);margin-top:calc(var(--h3d-h) / -2);transform:translate(calc(var(--h3d-w) / -2 - 5px)) rotateY(-90deg)}.scaffold-right{width:calc(var(--h3d-d) + 10px);height:var(--h3d-h);margin-left:calc((var(--h3d-d) + 10px) / -2);margin-top:calc(var(--h3d-h) / 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