/* ==========================================================================
   TTC / trafmaster — clean responsive stylesheet (CSS3, Flexbox + Grid)
   No frameworks. Mobile-first.
   ========================================================================== */
:root{
  --c-primary:#2f6fd0;
  --c-primary-d:#2559ab;
  --c-ink:#16283f;
  --c-body:#3a4d63;
  --c-muted:#6b7f96;
  --c-line:#e2e8f1;
  --c-bg:#ffffff;
  --c-bg-soft:#f5f8fc;
  --c-bg-dark:#122238;
  --c-accent:#31c46d;
  --radius:14px;
  --radius-sm:10px;
  --shadow:0 10px 30px rgba(20,40,80,.08);
  --shadow-lg:0 24px 60px rgba(20,40,80,.16);
  --maxw:1180px;
  --gap:clamp(16px,3vw,32px);
  --font:'Inter','Segoe UI',system-ui,-apple-system,Roboto,Arial,sans-serif;
  --h1:clamp(30px,5vw,52px);
  --h2:clamp(26px,3.6vw,40px);
  --h3:clamp(19px,2.2vw,24px);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font);color:var(--c-body);background:var(--c-bg);
  line-height:1.6;font-size:16px;overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{color:var(--c-ink);line-height:1.2;font-weight:700}
h1{font-size:var(--h1)}h2{font-size:var(--h2)}h3{font-size:var(--h3)}
p{margin:0 0 1em}
ul{list-style:none}
:focus-visible{outline:3px solid var(--c-primary);outline-offset:2px}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 clamp(16px,4vw,32px)}
.section{padding:clamp(48px,7vw,96px) 0}
.section--soft{background:var(--c-bg-soft)}
.section__head{text-align:center;max-width:720px;margin:0 auto clamp(28px,4vw,48px)}
.section__head p{color:var(--c-muted);font-size:clamp(15px,1.6vw,18px);margin:0}
.eyebrow{display:inline-block;font-size:clamp(15px,1.9vw,18px);font-weight:800;letter-spacing:.06em;
  text-transform:uppercase;color:var(--c-primary);margin-bottom:12px}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip-link{position:absolute;left:12px;top:-60px;background:var(--c-primary);color:#fff;
  padding:10px 18px;border-radius:var(--radius-sm);z-index:1000;transition:top .2s}
.skip-link:focus{top:12px}

/* Buttons ----------------------------------------------------------------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-weight:600;font-size:16px;line-height:1;padding:15px 28px;border:0;border-radius:var(--radius-sm);
  cursor:pointer;transition:transform .15s,box-shadow .15s,background .15s;text-align:center;font-family:inherit}
.btn--primary{background:var(--c-primary);color:#fff;box-shadow:0 8px 20px rgba(47,111,208,.28)}
.btn--primary:hover{background:var(--c-primary-d);transform:translateY(-2px);box-shadow:0 12px 28px rgba(47,111,208,.4)}
.btn--ghost{background:transparent;color:var(--c-primary);border:2px solid var(--c-primary)}
.btn--ghost:hover{background:var(--c-primary);color:#fff}
.btn--light{background:#fff;color:var(--c-primary)}
.btn--light:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.btn--block{width:100%}

/* Header ------------------------------------------------------------------ */
.header{position:sticky;top:0;z-index:900;background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--c-line);transition:box-shadow .2s}
.header.is-scrolled{box-shadow:var(--shadow)}
.header__inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:72px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:var(--c-ink)}
.brand img{height:38px;width:auto}
.nav{display:flex;align-items:center;gap:clamp(14px,2vw,30px)}
.nav a{font-weight:500;color:var(--c-body);transition:color .15s;position:relative;padding:4px 0}
.nav a::after{content:"";position:absolute;left:0;bottom:-2px;width:0;height:2px;background:var(--c-primary);transition:width .2s}
.nav a:hover{color:var(--c-primary)}
.nav a:hover::after{width:100%}
.header__contact{display:flex;align-items:center;gap:16px}
.header__phone{font-weight:700;color:var(--c-ink);white-space:nowrap}
.nav-toggle{display:none;flex-direction:column;gap:5px;width:44px;height:44px;
  align-items:center;justify-content:center;background:none;border:0;cursor:pointer}
.nav-toggle span{width:24px;height:2px;background:var(--c-ink);border-radius:2px;transition:.25s}
.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)}

/* Hero slider ------------------------------------------------------------- */
.hero{position:relative;background:linear-gradient(160deg,#eef4fc 0%,#f8fbff 100%);overflow:hidden}
.slider{position:relative;overflow:hidden}
.slides{display:flex;transition:transform .6s cubic-bezier(.65,.05,.36,1);will-change:transform}
.slide{flex:0 0 100%;padding:clamp(40px,6vw,80px) 0}
.slide__inner{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:clamp(24px,4vw,56px)}
.slide__body{max-width:540px}
.slide__title{font-size:var(--h1);margin-bottom:16px}
.slide__sub{font-size:clamp(16px,1.9vw,20px);color:var(--c-body);margin-bottom:28px}
.slide__list{margin:0 0 28px;display:grid;gap:10px}
.slide__list li{position:relative;padding-left:30px;color:var(--c-body)}
.slide__list li::before{content:"✓";position:absolute;left:0;top:0;color:var(--c-accent);font-weight:700}
.slide__media{display:flex;justify-content:center;align-items:center}
.slide__media img{max-height:456px;width:auto;filter:drop-shadow(0 20px 40px rgba(20,40,80,.18))}
.slider__controls{display:flex;align-items:center;justify-content:center;gap:16px;padding-bottom:32px}
.slider__btn{width:48px;height:48px;border-radius:50%;border:1px solid var(--c-line);
  background:#fff;color:var(--c-primary);font-size:20px;cursor:pointer;transition:.15s;box-shadow:var(--shadow)}
.slider__btn:hover{background:var(--c-primary);color:#fff;transform:scale(1.06)}
.slider__dots{display:flex;gap:10px}
.slider__dot{width:34px;height:5px;border-radius:3px;border:0;background:#c9d7ea;cursor:pointer;transition:.25s;padding:0}
.slider__dot.is-active{background:var(--c-primary);width:48px}

/* Features ---------------------------------------------------------------- */
.grid{display:grid;gap:var(--gap)}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--2{grid-template-columns:repeat(2,1fr)}
.card{background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);
  padding:clamp(22px,3vw,32px);box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.card__icon{width:52px;height:52px;border-radius:12px;background:#eaf2fd;color:var(--c-primary);
  display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:16px}
.card h3{margin-bottom:8px}
.card p{color:var(--c-muted);margin:0}

/* Products ---------------------------------------------------------------- */
.product{display:flex;flex-direction:column;background:#fff;border:1px solid var(--c-line);
  border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s}
.product:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.product__media{background:var(--c-bg-soft);aspect-ratio:4/3;display:flex;align-items:center;justify-content:center;padding:24px}
.product__media img{max-height:200px;object-fit:contain}
.product__body{padding:24px;display:flex;flex-direction:column;flex:1}
.product__body h3{margin-bottom:10px;font-size:20px}
.product__desc{color:var(--c-muted);font-size:14px;margin-bottom:18px;flex:1}
.product__price{font-size:24px;font-weight:800;color:var(--c-ink);margin-bottom:16px}
.product__price span{font-size:14px;font-weight:500;color:var(--c-muted)}

/* About ------------------------------------------------------------------- */
.about{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(28px,5vw,64px);align-items:center}
.about__media img{border-radius:var(--radius);box-shadow:var(--shadow-lg)}
.about__lead{font-size:clamp(17px,2vw,20px);color:var(--c-ink);font-weight:600;margin-bottom:16px}
.stats{display:flex;gap:clamp(20px,4vw,48px);margin-top:28px;flex-wrap:wrap}
.stat__num{font-size:clamp(28px,4vw,40px);font-weight:800;color:var(--c-primary);line-height:1}
.stat__label{font-size:14px;color:var(--c-muted)}

/* FAQ --------------------------------------------------------------------- */
.faq{max-width:820px;margin:0 auto}
.faq__item{border:1px solid var(--c-line);border-radius:var(--radius-sm);background:#fff;margin-bottom:14px;overflow:hidden}
.faq__q{width:100%;text-align:left;background:none;border:0;padding:20px 56px 20px 22px;
  font-size:clamp(16px,1.8vw,18px);font-weight:600;color:var(--c-ink);cursor:pointer;
  position:relative;font-family:inherit;line-height:1.4}
.faq__q::after{content:"+";position:absolute;right:22px;top:50%;transform:translateY(-50%);
  font-size:26px;color:var(--c-primary);transition:transform .2s;font-weight:400}
.faq__item.is-open .faq__q::after{content:"−"}
.faq__a{max-height:0;overflow:hidden;transition:max-height .3s ease;color:var(--c-body)}
.faq__a-inner{padding:0 22px 22px}

/* Contacts ---------------------------------------------------------------- */
.contacts{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,5vw,56px)}
.contact-list{display:grid;gap:22px;margin-top:8px}
.contact-item{display:flex;gap:14px;align-items:flex-start}
.contact-item__ic{width:44px;height:44px;flex:none;border-radius:10px;background:#eaf2fd;color:var(--c-primary);
  display:flex;align-items:center;justify-content:center;font-size:20px}
.contact-item__label{font-size:13px;color:var(--c-muted)}
.contact-item__val{font-size:18px;font-weight:600;color:var(--c-ink)}
.contact-item__val a:hover{color:var(--c-primary)}
.map{border:0;width:100%;height:100%;min-height:320px;border-radius:var(--radius);filter:grayscale(.1)}
.contact-cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:26px}

/* Footer ------------------------------------------------------------------ */
.footer{background:var(--c-bg-dark);color:#b9c6d8;padding:clamp(40px,6vw,64px) 0 28px}
.footer a{color:#b9c6d8;transition:color .15s}
.footer a:hover{color:#fff}
.footer__grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:clamp(24px,4vw,48px);margin-bottom:36px}
.footer__brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:20px;margin-bottom:14px}
.footer__brand img{height:36px;filter:brightness(0) invert(1)}
.footer h4{color:#fff;font-size:15px;margin-bottom:14px;text-transform:uppercase;letter-spacing:.05em}
.footer ul{display:grid;gap:10px;font-size:15px}
.footer__bottom{border-top:1px solid rgba(255,255,255,.12);padding-top:22px;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:#8496ac}

/* Modal ------------------------------------------------------------------- */
.modal{position:fixed;inset:0;z-index:1000;display:none;align-items:center;justify-content:center;
  background:rgba(18,34,56,.6);backdrop-filter:blur(4px);padding:20px}
.modal.is-open{display:flex;animation:fade .2s ease}
.modal__card{background:#fff;border-radius:var(--radius);max-width:440px;width:100%;
  padding:clamp(26px,4vw,36px);position:relative;box-shadow:var(--shadow-lg);animation:pop .25s ease}
.modal__close{position:absolute;top:14px;right:14px;width:38px;height:38px;border:0;background:#f0f4f9;
  border-radius:50%;font-size:22px;color:var(--c-muted);cursor:pointer;line-height:1;transition:.15s}
.modal__close:hover{background:#e2e8f1;color:var(--c-ink)}
.modal h3{margin-bottom:6px}
.modal__sub{color:var(--c-muted);font-size:15px;margin-bottom:20px}
.field{margin-bottom:14px}
.field label{display:block;font-size:13px;color:var(--c-muted);margin-bottom:6px}
.field input{width:100%;padding:13px 15px;border:1.5px solid var(--c-line);border-radius:var(--radius-sm);
  font-size:16px;font-family:inherit;transition:border .15s}
.field input:focus{outline:0;border-color:var(--c-primary)}
.form__err{color:#e04b4b;font-size:13px;min-height:18px;margin:2px 0 10px}
.form__ok{display:none;text-align:center;padding:10px 0}
.form__ok .chk{width:64px;height:64px;margin:0 auto 14px;border-radius:50%;background:#e7f8ee;
  color:var(--c-accent);display:flex;align-items:center;justify-content:center;font-size:34px}
.form__consent{font-size:12px;color:var(--c-muted);margin-top:12px;text-align:center}
.form__consent a{color:var(--c-primary);text-decoration:underline}

/* Reveal animation -------------------------------------------------------- */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease}
.reveal.is-visible{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
}
@keyframes fade{from{opacity:0}to{opacity:1}}
@keyframes pop{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}

/* Legal pages ------------------------------------------------------------- */
.legal{padding:clamp(40px,6vw,72px) 0;max-width:860px;margin:0 auto}
.legal h1{margin-bottom:24px}
.legal h2{font-size:22px;margin:32px 0 12px}
.legal p,.legal li{color:var(--c-body);margin-bottom:12px}
.legal ul{list-style:disc;padding-left:22px;margin-bottom:16px}
.breadcrumbs{font-size:14px;color:var(--c-muted);padding:18px 0}
.breadcrumbs a:hover{color:var(--c-primary)}

/* Responsive -------------------------------------------------------------- */
@media (max-width:900px){
  .grid--3{grid-template-columns:repeat(2,1fr)}
  .about,.contacts{grid-template-columns:1fr}
  .footer__grid{grid-template-columns:1fr 1fr}
  .slide__inner{grid-template-columns:1fr;text-align:center}
  .slide__body{max-width:none;margin:0 auto}
  .slide__list{display:inline-grid;text-align:left}
  .slide__media{order:-1}
  .slide__media img{max-height:312px}
}
@media (max-width:720px){
  .nav{position:fixed;inset:72px 0 auto 0;flex-direction:column;background:#fff;
    padding:20px;gap:6px;border-bottom:1px solid var(--c-line);box-shadow:var(--shadow);
    transform:translateY(-140%);transition:transform .3s;align-items:stretch}
  .nav.is-open{transform:none}
  .nav a{padding:12px 8px;border-radius:8px}
  .nav a:hover{background:var(--c-bg-soft)}
  .nav-toggle{display:flex}
  .header__phone{display:none}
  .grid--2,.grid--3{grid-template-columns:1fr}
  .footer__grid{grid-template-columns:1fr}
  .stats{justify-content:space-between}
}