/* НТЦ «Редуктор» — дополнительные компоненты */

/* Живой логотип: «дыхание» плашки и слова */
@keyframes ntBreathe{
  0%,100%{transform:scale(1);box-shadow:0 0 0 0 rgba(23,50,90,0)}
  50%{transform:scale(1.07);box-shadow:0 8px 22px rgba(23,50,90,.24)}
}
@keyframes ntWordBreathe{
  0%,100%{opacity:.82;letter-spacing:.16em}
  50%{opacity:1;letter-spacing:.185em}
}
@keyframes ntGearSpin{from{transform:rotate(0)}to{transform:rotate(360deg)}}
.nt-logo .nt-mark{animation:ntBreathe 3.6s ease-in-out infinite;transform-origin:center center;will-change:transform}
.nt-logo .nt-mark svg{animation:ntGearSpin 40s linear infinite;transform-origin:center center}
.nt-logo .nt-word{animation:ntWordBreathe 3.6s ease-in-out infinite;display:inline-block;will-change:opacity}
.nt-logo:hover .nt-mark{animation-duration:1.8s}
@media (prefers-reduced-motion: reduce){
  .nt-logo .nt-mark,.nt-logo .nt-mark svg,.nt-logo .nt-word{animation:none !important}
}

/* Иллюстрации в карточках */
.nt-photo{background:#f7f9fb;border:1px solid var(--nt-line);border-radius:12px;overflow:hidden;margin:0 0 18px;aspect-ratio:4/3;display:block}
.nt-photo img{width:100%;height:100%;object-fit:cover;display:block}

/* Как мы работаем */
.nt-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;counter-reset:ntstep}
.nt-step{background:var(--nt-soft);border:1px solid var(--nt-line);border-radius:var(--nt-r);padding:26px 24px}
.nt-step::before{counter-increment:ntstep;content:counter(ntstep);display:grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--nt-ink);color:#fff;font-weight:700;font-size:14px;margin-bottom:16px}
.nt-step h3{margin:0 0 8px;font-size:16px;color:var(--nt-ink);letter-spacing:-.01em}
.nt-step p{margin:0;font-size:14px;color:var(--nt-body);line-height:1.5}

/* Калькулятор */
.nt-calc{background:var(--nt-soft);border:1px solid var(--nt-line);border-radius:var(--nt-r-lg);padding:32px}
.nt-calc-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.nt-field{display:block}
.nt-field span{display:block;font-size:13px;font-weight:600;color:var(--nt-body);margin-bottom:8px}
.nt-field input,.nt-field select{width:100%;height:50px;border:1px solid var(--nt-line);border-radius:12px;background:#fff;padding:0 14px;font:inherit;font-size:15px;color:var(--nt-ink);outline:none;transition:border-color .18s ease}
.nt-field input:focus,.nt-field select:focus{border-color:var(--nt-green)}
.nt-calc-actions{display:flex;gap:12px;align-items:center;margin-top:22px;flex-wrap:wrap}
.nt-calc-note{font-size:13px;color:var(--nt-muted);margin:14px 0 0}
.nt-result{display:none;background:#fff;border:1px solid var(--nt-line);border-radius:var(--nt-r);padding:26px;margin-top:22px}
.nt-result.nt-on{display:block}
.nt-result b{color:var(--nt-ink)}
.nt-result .nt-big{font-size:26px;font-weight:800;letter-spacing:-.02em;color:var(--nt-ink);display:block;margin:4px 0 10px}
.nt-result ul{margin:12px 0 0;padding-left:18px;font-size:15px;color:var(--nt-body)}
.nt-result li{margin:4px 0}

/* Каталог */
.nt-chips{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:28px}
.nt-chip{height:40px;padding:0 18px;border-radius:999px;border:1px solid var(--nt-line);background:#fff;font:inherit;font-size:14px;font-weight:600;color:var(--nt-body);cursor:pointer;transition:.18s}
.nt-chip:hover{border-color:#cfd6df}
.nt-chip.nt-active{background:var(--nt-ink);border-color:var(--nt-ink);color:#fff}
.nt-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.nt-prod{background:#fff;border:1px solid var(--nt-line);border-radius:var(--nt-r);padding:22px;display:flex;flex-direction:column;transition:border-color .18s, transform .18s, box-shadow .18s}
.nt-prod:hover{border-color:#d7dee7;transform:translateY(-2px);box-shadow:0 10px 28px rgba(11,21,34,.07)}
.nt-prod .nt-tag{font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--nt-muted);font-weight:700;margin-bottom:10px}
.nt-prod h3{margin:0 0 8px;font-size:18px;color:var(--nt-ink);letter-spacing:-.01em}
.nt-prod p{margin:0 0 18px;font-size:14px;color:var(--nt-body);line-height:1.5;flex:1}
.nt-prod .nt-btn{height:44px;font-size:14px;padding:0 18px}

/* Мобильная панель */
.nt-sticky{display:none}
@media (max-width:767px){
  .nt-sticky{display:flex;position:fixed;left:12px;right:12px;bottom:12px;z-index:60;gap:8px;background:#fff;border:1px solid var(--nt-line);border-radius:16px;padding:8px;box-shadow:0 12px 30px rgba(11,21,34,.16)}
  .nt-sticky a{flex:1;height:46px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700}
  .nt-sticky .nt-call{background:var(--nt-soft);color:var(--nt-ink)}
  .nt-sticky .nt-go{background:var(--nt-green);color:#fff}
  .nt-steps{grid-template-columns:1fr 1fr;gap:10px}
  .nt-step{padding:18px}
  .nt-calc{padding:20px;border-radius:16px}
  .nt-calc-grid{grid-template-columns:1fr;gap:14px}
  .nt-cards{grid-template-columns:1fr}
  .nt-ftr{padding-bottom:94px}
}