/* Bike Brothers Oslo AS — Website #101
   Cycle Workshop × Twin-Rail Technical Modernism
   Fully offline; HTML + CSS only. */

:root {
  --chalk:#f7f7f2; --paper:#fbfcf8; --graphite:#262a2b; --blue:#315f88;
  --yellow:#f1d348; --steel:#8d979d; --pine:#2f4f44; --line:rgba(38,42,43,.14);
  --sans:Arial,Helvetica,sans-serif; --mono:"Courier New",Courier,monospace;
  --shadow:0 18px 44px rgba(25,33,37,.09);
}
*{box-sizing:border-box} html{scroll-behavior:smooth}
body{margin:0;color:var(--graphite);background:linear-gradient(180deg,rgba(49,95,136,.04),transparent 18rem),var(--chalk);font-family:var(--sans);line-height:1.6;overflow-x:hidden}
a{color:inherit}.shell{width:min(1160px,calc(100% - 40px));margin:auto}.section{padding:5rem 0;scroll-margin-top:7rem}
.skip-link{position:fixed;left:1rem;top:1rem;z-index:999;padding:.7rem 1rem;background:var(--graphite);color:#fff;text-decoration:none;transform:translateY(-160%)}.skip-link:focus{transform:none}
.site-header{position:sticky;top:0;z-index:50;border-bottom:1px solid var(--line);background:rgba(247,247,242,.95);backdrop-filter:blur(10px)}
.header-inner{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:2rem}
.brand{display:grid;text-decoration:none;line-height:1}.brand span{font-size:1.15rem;font-weight:900;letter-spacing:-.015em;text-transform:uppercase}.brand small{margin-top:.25rem;color:var(--blue);font-family:var(--mono);font-size:.62rem;letter-spacing:.11em}
.main-nav,.footer-nav{display:flex;flex-wrap:wrap;gap:1.1rem}.main-nav a,.footer-nav a{text-decoration:none;font-size:.78rem;letter-spacing:.04em}.main-nav a{padding:.45rem 0;border-bottom:1px solid transparent}.main-nav a:hover,.main-nav a:focus-visible,.footer-nav a:hover,.footer-nav a:focus-visible{color:var(--blue);border-color:currentColor}
.hero{padding:4.7rem 0 5.4rem;scroll-margin-top:7rem}.hero-grid{display:grid;grid-template-columns:minmax(0,1.04fr) minmax(380px,.96fr);gap:clamp(3rem,7vw,7rem);align-items:center}
.eyebrow{margin:0 0 .8rem;color:var(--blue);font-family:var(--mono);font-size:.7rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase}
.measure-row{display:grid;grid-template-columns:auto 1fr auto;gap:.75rem;align-items:center;max-width:580px;margin-bottom:1rem;color:var(--steel);font-family:var(--mono);font-size:.64rem;letter-spacing:.08em}.measure-row i{height:1px;background:var(--line)}
h1,h2,h3{margin-top:0}h1,h2{font-weight:900;letter-spacing:-.055em;text-transform:uppercase}h1{max-width:760px;margin-bottom:1.3rem;font-size:clamp(3.5rem,7.2vw,6.9rem);line-height:.93}h2{margin-bottom:1rem;font-size:clamp(2.3rem,4.8vw,4.1rem);line-height:.97}h3{margin-bottom:.45rem;font-size:1.35rem;text-transform:uppercase}
p{margin-top:0;color:#5c6163}.lead{max-width:640px;margin-bottom:1.8rem;font-size:1.04rem}
.cta{display:inline-flex;min-height:48px;align-items:center;justify-content:center;padding:.82rem 1.3rem;border:1px solid var(--pine);background:var(--pine);color:#fff;text-decoration:none;font-size:.78rem;font-weight:800;letter-spacing:.09em;text-transform:uppercase}.cta:hover,.cta:focus-visible{transform:translateY(-2px);box-shadow:0 12px 28px rgba(47,79,68,.18)}
.micro-note{display:grid;grid-template-columns:48px 1fr;gap:.9rem;max-width:550px;margin-top:2rem}.micro-note p{margin:0;font-family:var(--mono);font-size:.75rem}.rail-icon{position:relative;width:42px;height:48px}.rail-icon:before,.rail-icon:after{content:"";position:absolute;top:0;width:3px;height:48px}.rail-icon:before{left:10px;background:var(--blue)}.rail-icon:after{right:10px;background:var(--yellow)}
.hero-art{position:relative;min-height:530px;overflow:hidden;border:1px solid var(--line);background:linear-gradient(135deg,rgba(49,95,136,.05),transparent 58%),var(--paper);box-shadow:var(--shadow)}
.grid{position:absolute;inset:0;background:linear-gradient(rgba(38,42,43,.04) 1px,transparent 1px) 0 0/32px 32px,linear-gradient(90deg,rgba(38,42,43,.04) 1px,transparent 1px) 0 0/32px 32px}
.rails{display:flex;gap:18px}.rails i{display:block;background:var(--blue)}.rails i:last-child{background:var(--yellow)}
.hero-rails{position:absolute;left:50%;top:48%;height:360px;transform:translate(-50%,-50%) rotate(18deg)}.hero-rails i{width:10px}
.arc{position:absolute;border-radius:50%;border:4px solid var(--graphite)}.arc-a{width:250px;height:250px;left:44px;bottom:44px;border-right-color:transparent;border-top-color:transparent;transform:rotate(18deg)}.arc-b{width:150px;height:150px;right:42px;top:62px;border-color:var(--pine) var(--pine) transparent transparent;transform:rotate(-10deg)}
.chain{position:absolute;width:58px;height:26px;border:2px solid var(--pine);border-radius:999px}.c1{right:104px;bottom:70px;transform:rotate(-14deg)}.c2{right:64px;bottom:52px;transform:rotate(16deg)}.c3{right:24px;bottom:70px;transform:rotate(-14deg)}
.inspection{position:absolute;left:28px;top:28px;width:230px;padding:1rem;border:1px solid var(--graphite);background:rgba(247,247,242,.93)}.inspection span,.inspection strong,.inspection small{display:block}.inspection span{color:var(--blue);font-family:var(--mono);font-size:.58rem;letter-spacing:.1em}.inspection strong{margin:.25rem 0;font-size:.94rem;letter-spacing:.05em}.inspection small{color:var(--steel);font-family:var(--mono);font-size:.56rem}
.ticks{display:grid;grid-template-columns:repeat(5,1fr);gap:5px;margin-top:.8rem}.ticks b{height:5px;background:var(--line)}.ticks b:nth-child(3){background:var(--yellow)}
.serial{position:absolute;left:30px;bottom:28px;padding:.5rem .7rem;background:var(--graphite);color:#fff;font-family:var(--mono);font-size:.58rem}.measure-label{position:absolute;color:var(--steel);font-family:var(--mono);font-size:.54rem}.ml1{right:18px;top:185px;transform:rotate(90deg)}.ml2{right:28px;bottom:24px}
.about{background:linear-gradient(90deg,rgba(141,151,157,.09),transparent 34%),#fbfcf8}.split{display:grid;grid-template-columns:70px .9fr 1.1fr;gap:clamp(1.8rem,4vw,4rem);align-items:start}.sec-no{color:var(--steel);font-family:var(--mono);font-size:.72rem;letter-spacing:.12em}.about-copy{padding-top:1.35rem;border-top:1px solid var(--line);font-size:1.02rem}
.section-title{display:grid;grid-template-columns:70px 1fr;gap:clamp(1.8rem,4vw,4rem);margin-bottom:2rem}
.modules{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem}.module{position:relative;min-height:315px;padding:1.15rem;border:1px solid var(--line);background:linear-gradient(180deg,rgba(49,95,136,.035),transparent 62%),var(--paper)}.module-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.4rem}.module-head span{color:var(--blue);font-family:var(--mono);font-size:.62rem}.dot{width:16px;height:16px;border-radius:50%}.dot.blue{background:var(--blue)}.dot.yellow{background:var(--yellow)}.dot.pine{background:var(--pine)}
.mini-rails{display:flex;gap:12px;height:54px;margin-bottom:1.35rem}.mini-rails i{width:6px;background:var(--blue)}.mini-rails i:last-child{background:var(--yellow)}.module p{margin-bottom:2.5rem}.module footer{position:absolute;left:1.15rem;right:1.15rem;bottom:1rem;display:flex;justify-content:space-between;gap:.8rem;padding-top:.7rem;border-top:1px solid var(--line);color:var(--steel);font-family:var(--mono);font-size:.56rem}
.process{padding-top:4rem;padding-bottom:4rem}.process-panel{position:relative;overflow:hidden;padding:clamp(2rem,5vw,4rem);border:1px solid var(--line);background:linear-gradient(rgba(38,42,43,.035) 1px,transparent 1px) 0 0/30px 30px,linear-gradient(90deg,rgba(38,42,43,.035) 1px,transparent 1px) 0 0/30px 30px,#edf0ee}.intro{max-width:700px}
.steps{position:relative;z-index:2;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1rem}.step{position:relative;min-height:190px;padding:1.15rem;border:1px solid var(--line);background:rgba(251,252,248,.84)}.step>span:first-child{display:block;margin-bottom:1rem;color:var(--blue);font-family:var(--mono);font-size:.62rem}.ring{display:block;width:50px;height:50px;margin-bottom:1rem;border:3px solid var(--pine);border-radius:50%;box-shadow:inset 0 0 0 7px var(--paper),inset 0 0 0 9px var(--yellow)}.step strong{display:block;font-size:1.08rem;letter-spacing:.05em;text-transform:uppercase}.step-rails{display:flex;gap:7px;margin-top:.7rem}.step-rails b{width:30px;height:3px;background:var(--blue)}.step-rails b:last-child{background:var(--yellow)}.step small{position:absolute;left:1.15rem;bottom:1rem;color:var(--steel);font-family:var(--mono);font-size:.56rem}.track{position:absolute;right:0;height:6px;opacity:.42}.t-a{top:82px;width:34%;background:var(--blue)}.t-b{bottom:76px;width:48%;background:var(--yellow)}
.closing{background:#f0f1ed}.closing-grid{display:grid;grid-template-columns:1fr minmax(330px,.8fr);gap:clamp(3rem,7vw,7rem);align-items:center}.closing-art{position:relative;min-height:280px;overflow:hidden;border:1px solid var(--line);background:var(--paper)}.closing-rails{position:absolute;right:54px;top:34px;height:205px;transform:rotate(14deg)}.closing-rails i{width:10px}.closing-card{position:absolute;left:26px;top:26px;width:230px;padding:1rem;border:1px solid var(--graphite);background:rgba(247,247,242,.93)}.closing-card span,.closing-card strong,.closing-card small{display:block}.closing-card span,.closing-card small{font-family:var(--mono);font-size:.58rem}.closing-card span{color:var(--blue)}.closing-card strong{margin:.25rem 0;font-size:.95rem;letter-spacing:.05em}.close-arc{position:absolute;right:26px;bottom:24px;width:110px;height:110px;border:3px solid var(--pine);border-top-color:transparent;border-left-color:transparent;border-radius:50%}.close-track{position:absolute;left:32px;bottom:34px;width:44%;height:5px;background:var(--blue)}
.legal{background:#e4e6e1}.legal-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem}.legal article{padding:2rem;border:1px solid var(--line);background:rgba(251,252,248,.68)}.legal h2{font-size:clamp(2rem,3.4vw,3rem);text-transform:none;letter-spacing:-.03em}.legal article p:last-child{margin-bottom:0}
.site-footer{padding:2rem 0;border-top:1px solid var(--line);background:#e4e6e1}.footer-inner{display:flex;justify-content:space-between;align-items:flex-end;gap:2rem}.footer-brand{display:grid;gap:.15rem}.footer-brand strong{font-size:1rem;letter-spacing:.04em;text-transform:uppercase}.footer-brand span{color:var(--blue);font-family:var(--mono);font-size:.6rem}

@media(max-width:980px){
  .header-inner{min-height:auto;padding:1rem 0;align-items:flex-start;flex-direction:column;gap:.7rem}
  .hero-grid,.closing-grid{grid-template-columns:1fr}.hero-art{min-height:450px}
  .split{grid-template-columns:56px 1fr}.about-copy{grid-column:2}
  .modules{grid-template-columns:1fr}.module{min-height:245px}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr))}
  .legal-grid{grid-template-columns:1fr}
}
@media(max-width:700px){
  .shell{width:min(100% - 28px,1160px)}.section{padding:4rem 0}
  h1{font-size:clamp(3rem,15vw,4.8rem)}h2{font-size:clamp(2.1rem,10vw,3rem)}
  .hero{padding-top:3rem}.measure-row{grid-template-columns:1fr}.measure-row i{display:none}.hero-art{min-height:380px}
  .hero-rails{height:280px}.arc-a{width:180px;height:180px;left:24px;bottom:30px}.arc-b{width:110px;height:110px;right:22px;top:46px}
  .inspection{left:20px;top:20px;width:190px}
  .split,.section-title{grid-template-columns:1fr;gap:.8rem}.about-copy{grid-column:auto}
  .steps{grid-template-columns:1fr}.step{min-height:150px}
  .footer-inner{flex-direction:column;align-items:flex-start}
}
@media(max-width:480px){
  .main-nav{display:grid;grid-template-columns:repeat(3,auto);justify-content:start;gap:.55rem 1rem}.main-nav a{font-size:.72rem}
  .hero-art{min-height:350px}.inspection{max-width:62%;padding:.8rem}.chain{opacity:.65}
  .closing-card{left:18px;top:18px;max-width:62%}.closing-rails{right:30px}
  .legal article,.process-panel{padding:1.35rem}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important}}