/* Busse Verkehrstechnik — unified styles, November 2026 */
:root{--paper:#fcfcfb;--ink:#30363a;--muted:#626b70;--yellow:#b9c0c3;--line:#d9dede;--soft:#f1f3f3;--max:1200px;--highlight:#5d6b71;--accent-hover:#e4e7e8;--wash:#f4f5f4}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:108px}body{margin:0;background:var(--paper);color:var(--ink);font-family:Arial,Helvetica,sans-serif;line-height:1.75;-webkit-font-smoothing:antialiased}a{color:inherit;text-underline-offset:4px}button{font:inherit}img{max-width:100%}h1,h2,h3,p{margin-top:0}h1,h2,h3{hyphens:none;-webkit-hyphens:none;word-break:normal;overflow-wrap:normal;text-wrap:pretty}h1,h2{line-height:1.1;letter-spacing:-.045em}h1{font-size:clamp(32px,4.05vw,58px);margin-bottom:28px}h1 span{color:var(--highlight)}h2{font-size:clamp(30px,3.65vw,48px);margin:14px 0 0}h3{line-height:1.3;letter-spacing:-.025em}p{margin-bottom:20px}a:focus-visible,button:focus-visible{outline:3px solid var(--highlight);outline-offset:5px}.container{width:min(var(--max),calc(100% - 80px));margin-inline:auto}.section-pad{padding-block:100px}.section-kicker,.card-eyebrow{font-size:11px;font-weight:700;letter-spacing:.15em;line-height:1.5;margin:0}.punctuation{color:var(--highlight)}.skip-link{position:fixed;left:16px;top:-100px;z-index:100;padding:12px 20px;background:var(--yellow)}.skip-link:focus{top:12px}
/* Header and navigation */
.site-header{position:sticky;top:0;z-index:30;background:rgba(251,252,248,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}.header-inner{min-height:88px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;flex-shrink:0}.brand-logo{width:56px;height:56px;object-fit:contain}.brand-type{display:flex;flex-direction:column;line-height:1}.brand-type strong{font-size:23px;letter-spacing:-.04em}.brand-type small{font-size:8px;letter-spacing:.18em;margin-top:6px;font-weight:700}.main-nav{display:flex;gap:26px;align-items:center}.main-nav a{text-decoration:none;font-size:13px;font-weight:700;position:relative;padding:12px 0}.main-nav a:after{content:'';position:absolute;bottom:6px;left:0;width:100%;height:2px;background:var(--highlight);transform:scaleX(0);transform-origin:left;transition:transform .2s}.main-nav a:hover:after,.main-nav a[aria-current]:after{transform:scaleX(1)}.nav-toggle{display:none}
/* Introduction */
.hero{padding-block:88px 96px;background:radial-gradient(ellipse at 85% 20%,var(--wash) 0,transparent 60%) 0,transparent 60%)}.hero-grid{display:block}.hero-content{max-width:1080px}.hero h1{max-width:1040px}.hero .lead{max-width:850px}.hero-content{min-width:0}.lead{font-size:16px;color:var(--muted);max-width:650px;line-height:1.85;margin-bottom:32px}.btn{display:inline-flex;align-items:center;justify-content:space-between;gap:32px;min-height:56px;padding:15px 24px;background:var(--yellow);text-decoration:none;font-size:14px;font-weight:700;border:1px solid transparent;transition:background .2s,transform .2s,box-shadow .2s}.btn svg{width:21px;height:21px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;transition:transform .2s}.btn:hover{background:var(--accent-hover);transform:translateY(-3px);box-shadow:0 9px 20px #183e3620}.btn:hover svg{transform:translateX(4px)}
/* Services */
.services,.collaboration{background:var(--soft)}.section-heading{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:end;margin-bottom:44px}.section-heading>p{max-width:390px;margin:0;color:var(--muted);font-size:15px}.service-grid{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:20px}.service-card{grid-column:span 2;background:#fff;position:relative;overflow:hidden;border:1px solid var(--line);padding:28px;min-width:0;min-height:320px;display:flex;flex-direction:column;transition:transform .25s,box-shadow .25s,border-color .25s}.service-card:nth-child(n+4){grid-column:span 3;min-height:280px}.service-card-top{display:flex;justify-content:space-between;align-items:start;margin-bottom:auto}.service-number{font-size:11px;color:var(--muted);font-weight:700}.service-card svg{width:50px;height:50px;fill:none;stroke:var(--ink);stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}.service-card h3{font-size:20px;margin:30px 0 14px}.service-card h3 span{font-size:15px;color:var(--muted);white-space:nowrap}.service-card p{font-size:14px;line-height:1.75;color:var(--muted);margin:0 0 22px;max-width:44ch}.service-open{align-self:flex-start;margin-top:auto;padding:7px 0;border:0;border-bottom:1px solid var(--yellow);background:transparent;color:var(--ink);font-size:12px;font-weight:700;cursor:pointer;display:inline-flex;gap:10px;align-items:center}.service-open:hover span{transform:translate(2px,-2px)}.service-open span{transition:transform .2s}.service-card:hover{transform:translateY(-7px);box-shadow:0 18px 36px #183e3614;border-color:var(--highlight)}.service-card:after{content:"";position:absolute;bottom:0;left:0;width:100%;height:4px;background:var(--yellow);transform:scaleX(0);transform-origin:left;transition:transform .3s}.service-card:hover:after{transform:scaleX(1)}.service-card svg{transition:transform .3s,color .3s}.service-card:hover svg{transform:translateY(-3px);color:var(--highlight)}
/* Profile and collaboration */
.split-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:80px}.section-rule{display:block;width:56px;height:3px;background:var(--yellow);margin-top:28px}.about-photo{width:min(100%,440px);margin:28px 0 0;padding:0;border:0;background:none;box-shadow:none}.about-photo img{display:block;width:100%;height:auto;border:0;border-radius:0}.split-content{padding-top:26px}.about .split-content{display:flex;flex-direction:column;justify-content:space-between}.about .split-content p{margin-bottom:14px}.about .split-content p:last-child{margin-bottom:0}.split-content p,.collab-description p{color:var(--muted);font-size:16px;line-height:1.85}.split-content .about-opening{font-size:23px;font-weight:700;color:var(--ink);line-height:1.45;margin-bottom:26px;max-width:30ch}.collaboration-heading{align-items:start}.collab-description{padding-top:25px}.collab-description p:last-child{margin-bottom:0}.benefit-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));margin-top:44px;border-top:1px solid var(--line)}.benefit{position:relative;padding:30px 24px 0 0;min-width:0}.benefit+.benefit{border-left:1px solid var(--line);padding-left:26px}.benefit-icon svg{width:42px;height:42px;fill:none;stroke:var(--ink);stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}.benefit-number{position:absolute;right:22px;top:34px;font-size:11px;color:var(--muted)}.benefit h3{font-size:18px;line-height:1.45;margin:18px 0 0}
/* Direct contact */
.contact-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:80px;align-items:center}.contact-intro{color:var(--muted);font-size:16px;line-height:1.85;max-width:400px;margin:28px 0}.contact-card{border-top:4px solid var(--yellow);min-width:0;padding:34px 36px 20px;background:#fff;border:1px solid var(--line);box-shadow:0 12px 36px #242a2806}.contact-card-accent{display:block;width:48px;height:4px;background:var(--yellow);margin-bottom:22px}.contact-card-heading{padding-bottom:22px;border-bottom:1px solid var(--line)}.card-eyebrow{color:var(--muted);font-size:10px;margin-bottom:12px}.contact-card h3{font-size:25px;margin-bottom:8px}.contact-owner{font-size:14px;margin:0}.contact-owner span{color:var(--muted)}.contact-detail{display:grid;grid-template-columns:36px minmax(0,1fr);gap:14px;padding:17px 0;border-bottom:1px solid #eceee6;align-items:start}.contact-detail:last-child{border:0}.contact-detail-icon{width:36px;height:36px;display:grid;place-items:center;background:#eef4ec;border-radius:50%}.contact-detail-icon svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}.contact-detail-label{display:block;font-size:9px;font-weight:700;letter-spacing:.13em;color:var(--muted);margin-bottom:3px}.contact-detail address,.contact-detail a{font-size:14px;line-height:1.7;font-style:normal;display:block;overflow-wrap:anywhere}.contact-detail a{text-decoration:none;font-weight:600}.contact-detail a:hover{text-decoration:underline}
/* Footer and legal pages */
.site-footer{background:var(--ink);color:var(--paper);padding:20px 0;border:0}.footer-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px 32px}.footer-brand{display:flex;align-items:center;gap:11px;flex:0 0 auto;text-decoration:none}.footer-brand strong{font-size:16px;font-weight:600;letter-spacing:.095em}.footer-brand span{font-size:8px;letter-spacing:.18em}.footer-inner p{margin:0;font-size:12px;color:var(--muted);grid-row:2}.footer-links{display:flex;gap:22px;margin-left:auto}.footer-links a{font-size:13px;text-decoration:none}.footer-links a:hover{text-decoration:underline}.footer-inner small{font-size:11px;opacity:.72;border:0;padding:0;margin:0;text-align:right;white-space:nowrap}.legal-hero{padding:70px 0 40px;border-bottom:1px solid var(--line)}.legal-hero h1{margin:20px 0}.legal-intro{color:var(--muted);margin:0}.legal-content{max-width:800px;padding:48px 0 88px}.legal-content h2{font-size:25px;margin:34px 0 16px;letter-spacing:-.025em;line-height:1.3}.legal-content h2:first-child{margin-top:0}.legal-content p{font-size:16px;color:var(--muted);overflow-wrap:anywhere}.legal-back{display:inline-block;margin-top:18px;font-size:14px;font-weight:700}
.nav-toggle span{transition:transform .2s,opacity .2s}.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
/* Optional reveal effects: content remains visible if JavaScript is unavailable. */
.reveal{animation:reveal-in .8s both}@keyframes reveal-in{from{opacity:.15;transform:translateY(24px)}to{opacity:1;transform:none}}
@media(min-width:801px) and (max-width:1100px){.main-nav{gap:16px}.main-nav a{font-size:12px}.hero-grid{gap:32px;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr)}.service-card{padding:22px;grid-column:span 3}.service-card:last-child{grid-column:span 6}.section-heading,.split-layout,.contact-grid{gap:40px}.service-card h3{font-size:20px}.benefit h3{font-size:16px}}
@media(max-width:800px){html{scroll-padding-top:92px}.container{width:calc(100% - 40px)}.section-pad{padding-block:64px}.header-inner{min-height:74px}.brand-logo{width:46px;height:46px}.brand-type strong{font-size:21px}.nav-toggle{display:flex;width:44px;height:44px;border:1px solid var(--line);background:transparent;flex-direction:column;align-items:center;justify-content:center;gap:5px;cursor:pointer}.nav-toggle span{width:20px;height:2px;background:var(--ink)}.main-nav{display:flex;flex-wrap:wrap;gap:4px 18px;padding-bottom:14px}.header-inner{flex-wrap:wrap}.main-nav a{font-size:13px}.js .main-nav{display:none;position:absolute;top:74px;left:0;right:0;background:var(--paper);padding:12px 20px 20px;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;gap:0}.js .main-nav.is-open{display:flex}.main-nav a{padding:12px 0}.hero-grid,.section-heading,.split-layout,.contact-grid{grid-template-columns:minmax(0,1fr);gap:32px}.hero{padding-top:48px}.hero h1{font-size:clamp(27px,5.5vw,43px);max-width:650px}.lead{font-size:15px}.section-heading{gap:22px;margin-bottom:30px}.section-heading>p{max-width:550px}.service-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.service-card,.service-card:nth-child(n+4){grid-column:auto;min-height:290px;padding:24px}.service-card:last-child{grid-column:1/-1;min-height:245px}.service-card h3{font-size:19px}.about-photo{width:min(100%,400px);margin-top:24px}.split-content{padding-top:0}.split-content p,.collab-description p{font-size:15px}.collab-description{padding-top:0}.benefit-grid{grid-template-columns:1fr;margin-top:30px}.benefit,.benefit+.benefit{padding:24px 0;border-left:0;border-bottom:1px solid var(--line);display:grid;grid-template-columns:48px 1fr;gap:18px;align-items:center}.benefit h3{margin:0;font-size:18px;padding-right:24px}.benefit-number{right:0;top:24px}.contact-card{padding:28px 26px 14px}.contact-intro{max-width:550px}.footer-inner{grid-template-columns:1fr}.footer-links,.footer-inner p,.footer-inner small{grid-column:1;grid-row:auto}.footer-inner p{max-width:330px}.legal-hero{padding:48px 0 32px}.legal-content{padding:36px 0 64px}}
@media(max-width:520px){.service-grid{grid-template-columns:minmax(0,1fr)}.service-card,.service-card:nth-child(n+4){min-height:250px;padding:24px}.service-card h3{font-size:19px}.service-card h3,.benefit h3{max-width:100%}.contact-card{padding:26px 20px 12px}.contact-card h3{font-size:22px}.contact-detail{gap:10px;grid-template-columns:30px minmax(0,1fr)}.contact-detail-icon{width:30px;height:30px}.contact-detail a,.contact-detail address{font-size:13px}h2{font-size:30px}.legal-content h2{font-size:23px}.btn{padding-inline:20px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}.service-card:hover,.service-card:hover svg,.btn:hover,.btn:hover svg{transform:none}}


/* Graphitgrau, ruhige Typografie und ausgewogene Wort-Bild-Marke. */

.brand{gap:12px}.brand-logo{width:68px;height:68px;object-fit:contain;flex:0 0 68px}.brand-type{display:flex;flex-direction:column;gap:5px;line-height:1.05;white-space:nowrap}.brand-name{font-family:"Segoe UI",Arial,Helvetica,sans-serif;font-size:23px;font-weight:500;letter-spacing:.025em;color:var(--ink)}.brand-type small{font-family:"Segoe UI",Arial,Helvetica,sans-serif;font-size:9px;font-weight:500;letter-spacing:.075em;color:var(--highlight);margin:0}
.footer-logo{display:block;width:46px;height:46px;object-fit:contain;flex:0 0 46px}.footer-brand-type{display:flex;flex-direction:column;gap:4px;line-height:1}.footer-brand-type .brand-name{font-size:17px;font-weight:500;letter-spacing:.035em;color:var(--paper)}.footer-brand-type small{font-size:8px;font-weight:500;letter-spacing:.09em;opacity:.82}.footer-inner small{flex:0 1 auto}
.hero-grid{display:block}.hero-content{max-width:1080px}.hero h1{max-width:1040px}.hero .lead{max-width:850px}.service-explanation{width:100%;margin-top:18px;padding:16px 17px;background:var(--soft);border-left:3px solid var(--yellow)}.service-explanation[hidden]{display:none}.service-explanation h4{font-size:15px;line-height:1.4;margin:0 0 7px}.service-explanation p{font-size:13px;line-height:1.65;color:var(--muted);margin:0}.service-open[aria-expanded="true"]{border-color:var(--line)}
@media(max-width:800px){.brand{gap:10px}.brand-logo{width:56px;height:56px;flex-basis:56px}.brand-name{font-size:21px}.brand-type small{font-size:8px;letter-spacing:.07em}.about .split-content{display:block;padding-top:0}.footer-inner{justify-content:flex-start;gap:14px 22px}.footer-links{margin-left:0}.footer-inner small{flex-basis:100%;text-align:left;white-space:normal}}