/* ============================================
   INFRABIKE 2027 — Design System V2
   WHITE dominant • BLACK contrast • RED #f92323
   Sporty • Bold • Modern
   ============================================ */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{overflow-x:hidden;scroll-behavior:smooth}
body{overflow-x:hidden}
img{max-width:100%;display:block}
/* WhatsApp floating button */
.wa-float{position:fixed;bottom:24px;right:24px;width:56px;height:56px;background:#25D366;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 20px rgba(37,211,102,.4);z-index:900;transition:transform .3s,box-shadow .3s;text-decoration:none}
.wa-float:hover{transform:scale(1.1);box-shadow:0 6px 28px rgba(37,211,102,.5)}
@media(max-width:640px){.wa-float{bottom:16px;right:16px;width:50px;height:50px}}
:root{
  --white:#FFFFFF;
  --off-white:#F7F7F8;
  --gray-50:#F0F0F2;
  --gray-100:#E4E4E8;
  --gray-300:#B0B0BC;
  --gray-500:#6E6E80;
  --gray-700:#3A3A48;
  --gray-900:#1A1A24;
  --black:#0A0A0F;
  --red:#F92323;
  --red-dark:#D91E1E;
  --red-light:#FF4D4D;
  --red-bg:rgba(249,35,35,0.06);
  --red-glow:rgba(249,35,35,0.12);
  --font:'Inter',system-ui,-apple-system,sans-serif;
  --max-w:1280px;
  --nav-h:80px;
  --radius:12px;
  --radius-sm:8px;
  --tr:0.3s cubic-bezier(0.25,0.46,0.45,0.94);
}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--white);color:var(--black);-webkit-font-smoothing:antialiased;overflow-x:hidden;line-height:1.6}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}

/* --- Typography (HUGE & BOLD) --- */
h1,.h1{font-size:clamp(44px,7vw,96px);font-weight:900;line-height:0.95;letter-spacing:-0.04em;text-transform:uppercase}
h2,.h2{font-size:clamp(32px,4.5vw,64px);font-weight:900;line-height:1.0;letter-spacing:-0.03em;text-transform:uppercase}
h3,.h3{font-size:clamp(22px,2.5vw,32px);font-weight:800;line-height:1.15;letter-spacing:-0.02em}
h4,.h4{font-size:18px;font-weight:700;line-height:1.3}
.text-lg{font-size:18px;line-height:1.7}
.text-muted{color:var(--gray-500)}
.text-white{color:var(--white)}
.text-red{color:var(--red)}
.text-accent{
  background:linear-gradient(135deg,var(--red),#FF6B35);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}
.text-center{text-align:center}
.text-stroke{
  -webkit-text-stroke:2px var(--black);
  color:transparent;
}

/* --- Layout --- */
.container{width:100%;max-width:var(--max-w);margin:0 auto;padding:0 40px}
.section{padding:120px 0}
.section--white{background:var(--white);color:var(--black)}
.section--light{background:var(--off-white);color:var(--black)}
.section--dark{background:var(--black);color:var(--white)}
.section--red{background:var(--red);color:var(--white)}
.grid{display:grid;gap:32px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.flex{display:flex;align-items:center}
.gap-sm{gap:12px}
.gap-md{gap:24px}
.gap-lg{gap:48px}

/* --- Navigation --- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:999;
  background:rgba(255,255,255,.97);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid rgba(0,0,0,0.06);
  transition:box-shadow .3s;
}
.nav--scrolled{box-shadow:0 4px 30px rgba(0,0,0,.08)}
.nav__inner{
  display:flex;align-items:center;justify-content:space-between;
  height:var(--nav-h);max-width:1400px;margin:0 auto;padding:0 24px;gap:16px;
}
.nav__logo{flex-shrink:0}
.nav__logo img{height:32px}
.nav__menu{display:flex;align-items:center}
.nav__menu a{
  display:block;padding:10px 14px;font-size:12px;font-weight:700;
  color:var(--gray-700);transition:color .25s;
  text-transform:uppercase;letter-spacing:.05em;white-space:nowrap;text-decoration:none;
}
.nav__menu a:hover{color:var(--red)}
.nav__right{display:flex;align-items:center;gap:12px}
.nav__cta{
  display:inline-flex;align-items:center;padding:10px 24px;
  background:var(--red);color:#fff;border-radius:60px;
  font-size:12px;font-weight:700;text-transform:uppercase;
  letter-spacing:.05em;text-decoration:none;transition:all .3s;white-space:nowrap;
}
.nav__cta:hover{background:var(--red-dark)}
.nav__burger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:4px}
.nav__burger span{width:22px;height:1.5px;background:var(--black);border-radius:2px;transition:all .3s}
.nav__burger.open span:nth-child(1){transform:rotate(45deg) translate(4px,4px)}
.nav__burger.open span:nth-child(2){opacity:0}
.nav__burger.open span:nth-child(3){transform:rotate(-45deg) translate(4px,-4px)}

/* --- Buttons --- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:16px 32px;border-radius:60px;
  font-family:var(--font);font-size:14px;font-weight:700;
  cursor:pointer;transition:all var(--tr);border:none;
  text-transform:uppercase;letter-spacing:0.06em;
  text-decoration:none;
}
.btn--red{background:var(--red);color:var(--white)}
.btn--red:hover{background:var(--red-dark);transform:translateY(-2px);box-shadow:0 8px 24px rgba(249,35,35,0.3)}
.btn--black{background:var(--black);color:var(--white)}
.btn--black:hover{background:var(--gray-900);transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,0.2)}
.btn--white{background:var(--white);color:var(--black)}
.btn--white:hover{background:var(--gray-50);transform:translateY(-2px)}
.btn--outline{background:transparent;color:var(--black);border:2px solid var(--black)}
.btn--outline:hover{background:var(--black);color:var(--white)}
.btn--outline-white{background:transparent;color:var(--white);border:2px solid rgba(255,255,255,0.3)}
.btn--outline-white:hover{background:rgba(255,255,255,0.1);border-color:var(--white)}
.btn__arrow{transition:transform var(--tr)}
.btn:hover .btn__arrow{transform:translateX(4px)}

/* --- HERO (full-width image bg, white text, Nike-style) --- */
.hero{
  position:relative;
  min-height:100vh;
  display:flex;align-items:center;
  overflow:hidden;
  background:var(--black);
  padding-top:var(--nav-h);
}
.hero__bg{
  position:absolute;inset:0;
  background-size:cover;background-position:center;
  opacity:0.5;
}
.hero__overlay{
  position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(10,10,15,0.85) 0%,rgba(10,10,15,0.4) 60%,transparent 100%);
}
.hero__content{
  position:relative;z-index:2;
  max-width:var(--max-w);margin:0 auto;padding:0 40px;
  width:100%;
}
.hero__overline{
  font-size:13px;font-weight:700;letter-spacing:0.15em;text-transform:uppercase;
  color:var(--red);margin-bottom:24px;
  display:flex;align-items:center;gap:12px;
}
.hero__overline::before{content:'';width:40px;height:2px;background:var(--red)}
.hero__title{color:var(--white);margin-bottom:24px}
.hero__title .red{color:var(--red)}
.hero__sub{font-size:20px;line-height:1.6;color:rgba(255,255,255,0.7);max-width:560px;margin-bottom:40px}
.hero__actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:48px}
.hero__stats{display:flex;gap:48px}
.hero__stat-val{font-size:36px;font-weight:900;color:var(--white)}
.hero__stat-label{font-size:12px;font-weight:600;letter-spacing:0.08em;text-transform:uppercase;color:rgba(255,255,255,0.5);margin-top:4px}
.hero__product{
  position:absolute;
  right:-5%;bottom:0;
  width:55%;max-width:700px;
  z-index:1;opacity:0.9;
}
.hero__product img{width:100%}

/* --- Section Headers --- */
.section-header{max-width:800px;margin-bottom:72px}
.section-header--center{text-align:center;margin-left:auto;margin-right:auto}
.section-header .overline{
  font-size:12px;font-weight:800;letter-spacing:0.15em;text-transform:uppercase;
  color:var(--red);margin-bottom:16px;display:flex;align-items:center;gap:12px;
}
.section-header--center .overline{justify-content:center}
.section-header .overline::before{content:'';width:24px;height:2px;background:var(--red)}
.section-header h2{margin-bottom:16px}
.section-header p{color:var(--gray-500);font-size:18px;line-height:1.7}

/* --- Cards (white bg on light sections, dark on dark) --- */
.card{
  background:var(--white);
  border:1px solid var(--gray-100);
  border-radius:var(--radius);
  padding:40px 32px;
  transition:all var(--tr);
  position:relative;overflow:hidden;
}
.card:hover{transform:translateY(-6px);box-shadow:0 20px 40px rgba(0,0,0,0.08);border-color:var(--red)}
.card__number{
  font-size:64px;font-weight:900;
  color:var(--gray-50);
  position:absolute;top:16px;right:20px;
  line-height:1;
}
.card__icon{
  width:48px;height:48px;border-radius:50%;
  background:var(--red-bg);
  display:flex;align-items:center;justify-content:center;
  margin-bottom:20px;font-size:20px;
}
.card__title{font-size:20px;font-weight:800;margin-bottom:10px;text-transform:uppercase;letter-spacing:-0.01em}
.card__text{font-size:15px;color:var(--gray-500);line-height:1.7}

/* Dark cards */
.card--dark{background:var(--gray-900);border-color:rgba(255,255,255,0.06);color:var(--white)}
.card--dark:hover{border-color:var(--red);box-shadow:0 20px 40px rgba(0,0,0,0.4)}
.card--dark .card__number{color:rgba(255,255,255,0.04)}
.card--dark .card__text{color:rgba(255,255,255,0.6)}

/* --- Feature Rows --- */
.feature-row{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center}
.feature-row--reverse .feature-row__img{order:-1}
.feature-row__content{display:flex;flex-direction:column;gap:20px}
.feature-row__img{border-radius:var(--radius);overflow:hidden;position:relative}
.feature-row__img img{width:100%;transition:transform 0.6s ease}
.feature-row__img:hover img{transform:scale(1.03)}
.feature-row__img::after{
  content:'';position:absolute;inset:0;
  border-radius:var(--radius);
  border:1px solid rgba(0,0,0,0.06);
  pointer-events:none;
}
.check-list{display:flex;flex-direction:column;gap:14px}
.check-list li{display:flex;gap:12px;align-items:flex-start;font-size:16px;color:var(--gray-700)}
.check-list li::before{content:'';flex-shrink:0;width:22px;height:22px;border-radius:50%;background:var(--red);margin-top:2px;
  background-image:url("data:image/svg+xml,%3Csvg width='12' height='10' viewBox='0 0 12 10' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 5L4.5 8.5L11 1.5' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:center;background-size:12px;
}

/* --- Stats Banner --- */
.stats-banner{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.stats-banner__item{padding:48px 32px;text-align:center;border-right:1px solid rgba(255,255,255,0.1)}
.stats-banner__item:last-child{border:none}
.stats-banner__val{font-size:clamp(36px,5vw,56px);font-weight:900;line-height:1;margin-bottom:8px}
.stats-banner__label{font-size:13px;font-weight:600;text-transform:uppercase;letter-spacing:0.06em;opacity:0.6}

/* --- Full-width image section --- */
.full-img{
  position:relative;
  min-height:500px;
  display:flex;align-items:center;
  overflow:hidden;
}
.full-img__bg{position:absolute;inset:0;background-size:cover;background-position:center}
.full-img__overlay{position:absolute;inset:0;background:rgba(10,10,15,0.6)}
.full-img__content{position:relative;z-index:2;padding:80px 0;width:100%}

/* --- Press --- */
.press-row{display:flex;flex-wrap:wrap;gap:40px;align-items:center;justify-content:center}
.press-name{font-size:16px;font-weight:800;text-transform:uppercase;letter-spacing:0.05em;opacity:0.25;transition:opacity var(--tr)}
.press-name:hover{opacity:0.6}

/* --- Testimonials --- */
.testimonial{padding:40px;border-left:4px solid var(--red);background:var(--off-white);border-radius:0 var(--radius) var(--radius) 0}
.testimonial__quote{font-size:18px;line-height:1.7;margin-bottom:20px;font-style:italic;color:var(--gray-700)}
.testimonial__author{font-size:15px;font-weight:800;text-transform:uppercase}
.testimonial__role{font-size:13px;color:var(--gray-500)}

/* --- Footer --- */
.footer{background:var(--black);color:var(--white);padding:80px 0 40px}
.footer__grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px;margin-bottom:56px}
.footer__brand p{color:rgba(255,255,255,0.5);font-size:14px;margin-top:16px;max-width:300px;line-height:1.7}
.footer__title{font-size:12px;font-weight:800;letter-spacing:0.1em;text-transform:uppercase;color:rgba(255,255,255,0.4);margin-bottom:20px}
.footer__link{display:block;color:rgba(255,255,255,0.7);font-size:14px;padding:6px 0;transition:color var(--tr)}
.footer__link:hover{color:var(--white)}
.footer__bottom{display:flex;justify-content:space-between;align-items:center;padding-top:40px;border-top:1px solid rgba(255,255,255,0.08);font-size:13px;color:rgba(255,255,255,0.3)}
.footer__social{display:flex;gap:12px}
.footer__social a{width:40px;height:40px;border-radius:50%;border:1px solid rgba(255,255,255,0.12);display:flex;align-items:center;justify-content:center;transition:all var(--tr);font-size:14px;color:rgba(255,255,255,0.5)}
.footer__social a:hover{border-color:var(--red);color:var(--red)}

/* --- Page Hero --- */
.page-hero{padding:160px 0 80px;position:relative;overflow:hidden}
.page-hero--dark{background:var(--black);color:var(--white)}
.page-hero h1{margin-bottom:16px}

/* --- Forms --- */
.form-group{margin-bottom:20px}
.form-label{display:block;font-size:13px;font-weight:700;margin-bottom:8px;text-transform:uppercase;letter-spacing:0.04em}
.form-input,.form-textarea,.form-select{
  width:100%;padding:16px 20px;
  background:var(--off-white);border:2px solid var(--gray-100);
  border-radius:var(--radius-sm);color:var(--black);
  font-family:var(--font);font-size:15px;transition:border-color var(--tr);
}
.form-input:focus,.form-textarea:focus{outline:none;border-color:var(--red)}
.form-textarea{resize:vertical;min-height:120px}

/* --- Accordion --- */
.accordion{border-top:2px solid var(--gray-100)}
.accordion__item{border-bottom:2px solid var(--gray-100)}
.accordion__trigger{
  width:100%;padding:24px 0;background:none;border:none;
  color:var(--black);font-family:var(--font);font-size:18px;font-weight:800;
  text-align:left;cursor:pointer;display:flex;justify-content:space-between;align-items:center;
  text-transform:uppercase;letter-spacing:-0.01em;transition:color var(--tr);
}
.accordion__trigger:hover{color:var(--red)}
.accordion__trigger::after{content:'+';font-size:24px;font-weight:400;transition:transform var(--tr)}
.accordion__item.open .accordion__trigger::after{transform:rotate(45deg);color:var(--red)}
.accordion__body{max-height:0;overflow:hidden;transition:max-height 0.4s ease}
.accordion__body-inner{padding:0 0 24px;color:var(--gray-500);font-size:16px;line-height:1.7}

/* --- Animations --- */
@keyframes fadeUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes slideLeft{from{opacity:0;transform:translateX(60px)}to{opacity:1;transform:translateX(0)}}
.reveal{opacity:0;transform:translateY(30px);transition:all 0.8s cubic-bezier(0.22,1,0.36,1)}
.reveal.visible{opacity:1;transform:translateY(0)}
.reveal-delay-1{transition-delay:0.1s}
.reveal-delay-2{transition-delay:0.2s}
.reveal-delay-3{transition-delay:0.3s}

/* --- Responsive --- */

/* TABLET */
@media(max-width:1024px){
  .container{padding:0 24px}
  .section{padding:80px 0}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .feature-row{grid-template-columns:1fr;gap:40px}
  .feature-row--reverse .feature-row__img{order:0}
  .stats-banner{grid-template-columns:repeat(2,1fr)}
  .stats-banner__item{border-bottom:1px solid rgba(255,255,255,0.1)}
  .stats-banner__item:nth-child(2n){border-right:none}
  .footer__grid{grid-template-columns:1fr 1fr}
  .nav__menu{display:none}
  .nav__burger{display:flex}
}
@media(max-width:1200px){
  .nav__menu{display:none}
  .nav__burger{display:flex}
  .nav__inner{padding:0 24px}
  .hero__product{display:none}
  .hero__stats{gap:32px}
  .hero__content{padding:0 24px}
  .hero__sub{font-size:18px}
  .hero{padding-top:calc(var(--nav-h) + 20px)}
  .page-hero{padding:calc(var(--nav-h) + 40px) 0 60px}
  .section-header{margin-bottom:48px}
  .card{padding:28px 24px}
  .card__number{font-size:48px}
  .testimonial{padding:28px}
}

/* MOBILE */
@media(max-width:640px){
  :root{--nav-h:64px}
  .container{padding:0 16px}
  .section{padding:60px 0}
  h1,.h1{font-size:clamp(32px,10vw,48px);letter-spacing:-0.03em}
  h2,.h2{font-size:clamp(24px,7vw,36px)}
  h3,.h3{font-size:clamp(18px,5vw,24px)}
  .text-lg{font-size:16px}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .stats-banner{grid-template-columns:1fr}
  .stats-banner__item{padding:28px 20px;border-right:none}
  .stats-banner__val{font-size:32px}
  .hero{min-height:auto;padding-top:calc(var(--nav-h) + 24px);padding-bottom:60px}
  .hero__content{padding:0 16px}
  .hero__stats{flex-direction:column;gap:16px}
  .hero__stat-val{font-size:28px}
  .hero__actions{flex-direction:column}
  .hero__actions .btn{width:100%;justify-content:center}
  .hero__sub{font-size:16px;margin-bottom:28px}
  .hero__overline{font-size:11px}
  .page-hero{padding:120px 0 40px}
  .page-hero h1{font-size:clamp(28px,9vw,40px)}
  .nav__inner{padding:0 16px}
  .nav__mobile{padding:16px}
  .nav__mobile .nav__link{padding:14px 0;font-size:15px}
  .btn{padding:14px 24px;font-size:13px;width:100%;justify-content:center}
  .section-header{margin-bottom:36px}
  .section-header p{font-size:16px}
  .card{padding:24px 20px}
  .card__number{font-size:40px;top:12px;right:14px}
  .card__title{font-size:17px}
  .card__text{font-size:14px}
  .card__icon{width:40px;height:40px;margin-bottom:14px}
  .feature-row{gap:24px}
  .feature-row__content{gap:14px}
  .check-list li{font-size:14px}
  .accordion__trigger{font-size:15px;padding:18px 0}
  .accordion__body-inner{font-size:14px}
  .form-input,.form-textarea,.form-select{padding:14px 16px;font-size:14px}
  .form-label{font-size:12px}
  .testimonial{padding:20px;font-size:15px}
  .testimonial__quote{font-size:16px}
  .footer{padding:48px 0 24px}
  .footer__grid{grid-template-columns:1fr;gap:28px;margin-bottom:32px}
  .footer__brand p{max-width:100%}
  .footer__bottom{flex-direction:column;gap:12px;text-align:center;padding-top:24px}
  .footer__inner{display:grid;grid-template-columns:1fr;gap:28px;max-width:var(--max-w);margin:0 auto;padding:0 16px 32px}
  .footer__title{margin-bottom:12px}
  .footer__text{font-size:13px}
  .full-img{min-height:300px}
  .full-img__content{padding:40px 0}
  .press-row{gap:24px}
  .press-name{font-size:13px}
}
/* Social floating buttons */
.social-float{position:fixed;bottom:24px;right:24px;display:flex;flex-direction:column;gap:12px;z-index:900}
.social-float a{width:56px;height:56px;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 20px rgba(0,0,0,.2);transition:transform .3s,box-shadow .3s;text-decoration:none}
.social-float a:hover{transform:scale(1.1)}
.social-float .sf-wa{background:#25D366;box-shadow:0 4px 20px rgba(37,211,102,.4)}
.social-float .sf-ig{background:linear-gradient(45deg,#f09433,#e6683c,#dc2743,#cc2366,#bc1888);box-shadow:0 4px 20px rgba(225,48,108,.3)}
@media(max-width:640px){.social-float{bottom:16px;right:16px;gap:10px}.social-float a{width:50px;height:50px}}

/* Sticky CTA bar bottom */
.cta-bar{position:fixed;bottom:0;left:0;right:0;background:rgba(10,10,15,.95);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);padding:12px 24px;z-index:800;display:flex;align-items:center;justify-content:center;gap:12px;transform:translateY(100%);transition:transform .4s cubic-bezier(.22,1,.36,1);border-top:1px solid rgba(255,255,255,.1)}
.cta-bar.visible{transform:translateY(0)}
.cta-bar__text{color:rgba(255,255,255,.7);font-size:13px;font-weight:600}
.cta-bar__text strong{color:#fff}
.cta-bar a{flex-shrink:0}
@media(max-width:640px){.cta-bar{flex-direction:column;gap:8px;padding:10px 16px}.cta-bar__text{font-size:12px;text-align:center}.cta-bar a{width:100%;justify-content:center;padding:10px 20px;font-size:12px}}