/* ===== CSS Variables & Reset ===== */
:root {
  --color-text: #0d0801;
  --color-bg: #a5a5a7;
  --color-block: #4d4d4d;
  --color-accent: #fd5226;
  --color-hover: #f1f6f9;
  --color-white: #ffffff;

  --container-max: 1200px;
  --gap: 24px;
  --radius: 8px;
  --transition: 0.25s ease;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h, 70px); /* фактическая высота хедера */
}

body {
  font-family: Arial, Helvetica, sans-serif;
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-accent);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul {
  list-style: none;
}

button,
input,
textarea {
  font-family: inherit;
}

/* ===== Layout helpers ===== */
[class$="__container"] {
  position: relative;
  z-index: 2;
  width: 100%;
/*   max-width: var(--container-max); */
  margin: 0 auto;
  padding: 0 var(--gap);
}

.section-title {
  font-family: 'RadiotechnikaRegular', Arial, Helvetica, sans-serif;
  font-size: 2rem;
  margin-bottom: 2rem;
  text-align: center;
  color: inherit;
}

/* ===== containres width adaptive ===== */
@media (min-width: 765px) {
  .catalog__grid {
    padding-left: calc(var(--gap) + 80px);   /* отступ слева = стандартный + ширина цепи */
    padding-right: calc(var(--gap) + 80px);  /* отступ справа аналогично */
  }

  .about {
    padding: 5rem;
  }

  .clients__container {
    padding-left: calc(var(--gap) + 40px);   /* отступ слева = стандартный + ширина цепи */
    padding-right: calc(var(--gap) + 40px);  /* отступ справа аналогично */
  }
}

.about__container {
  padding-left: calc(var(--gap) + 0px);   /* отступ слева = стандартный + ширина цепи */
  padding-right: calc(var(--gap) + 0px);  /* отступ справа аналогично */
}

.hero__slide-content {
  padding-left: calc(var(--gap) + 80px);   /* отступ слева = стандартный + ширина цепи */
  padding-right: calc(var(--gap) + 80px);  /* отступ справа аналогично */
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 1.75rem;
  border-radius: var(--radius);
  font-weight: 700;
  text-align: center;
  border: none;
  cursor: pointer;
  transition: background-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.2);
}

.btn--primary {
  font-family: 'RadiotechnikaRegular', Arial, Helvetica, sans-serif;
  background-color: var(--color-accent);
  color: var(--color-white);
}

.btn--primary:hover {
  background-color: #e0441d;
}

.btn--secondary {
  font-family: 'RadiotechnikaRegular', Arial, Helvetica, sans-serif;
  background-color: var(--color-hover);
  color: var(--color-text);
}

.btn--secondary:hover {
  background-color: #d9e3e8;
}

/* ===== Header ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-block);
  color: var(--color-white);
}

.header__container {
  font-family: 'RadiotechnikaRegular', Arial, Helvetica, sans-serif;
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--gap);
  padding-top: 1rem;
  padding-bottom: 1rem;
}

/* .logo {
  background-image: url('./../assets/img/logo.png');
  background-position: center;
  background-size: cover;
  width: 150px;
  height: 35px;
} */

.logo_img {
  object-fit: contain;
  height: 2rem;            /* относительный размер, зависит от базового шрифта */
  width: auto;               /* ширина автоматически подстраивается под пропорции */
  max-height: 100%;          /* чтобы не вылезать за границы хедера */
  display: block;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav__list a {
  color: var(--color-white);
  font-weight: 600;
}

.nav__list a:hover {
  color: var(--color-accent);
}

.header__contacts {
  display: flex;
  flex-direction: row;
  align-items: flex-end;
  gap: 1.25rem;
  font-size: 0.8rem;
}

@media (max-width: 1305px){
  .header__contacts {
    flex-direction: column;
    gap: 0.25rem;  
  }
}

.header__contacts a:hover {
  color: var(--color-accent);
}

.header__callback {
  padding: 0.35rem 0.75rem;
  background-color: var(--color-accent);
  color: var(--color-white);
  border: none;
  border-radius: var(--radius);
  font-weight: 600;
  cursor: pointer;
  transition: background-color var(--transition);
}

.header__callback:hover {
  background-color: #e04a20;
}

.lang-switcher {
  display: flex;
  gap: 0.5rem;
}

.lang-switcher__btn {
  background: transparent;
  border: 1px solid var(--color-white);
  color: var(--color-white);
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius);
  cursor: pointer;
  font-weight: 600;
  transition: background-color var(--transition), border-color var(--transition), color var(--transition);
}

.lang-switcher__btn:hover,
.lang-switcher__btn--active {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-white);
}

/* ===== Hamburger ===== */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 22px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
}

.hamburger__line {
  display: block;
  width: 100%;
  height: 3px;
  background-color: var(--color-accent);
  border-radius: 2px;
  transition: background-color var(--transition), transform var(--transition), opacity var(--transition);
}

.hamburger:hover .hamburger__line {
  background-color: var(--color-accent);
}

.hamburger[aria-expanded="true"] .hamburger__line:nth-child(1) {
  transform: translateY(9.5px) rotate(45deg);
}

.hamburger[aria-expanded="true"] .hamburger__line:nth-child(2) {
  opacity: 0;
}

.hamburger[aria-expanded="true"] .hamburger__line:nth-child(3) {
  transform: translateY(-9.5px) rotate(-45deg);
}

/* ===== Hero / Slick Slider ===== */
.hero {
  position: sticky;
  top: var(--stick-top, 0px);
  height: calc(100vh - var(--header-h, 70px));
  min-height: 400px;
  background-color: var(--color-bg);
  color: var(--color-white);
  text-align: center;
  z-index: 15;
  overflow: hidden;
  width: 100%;
}

.hero__slider,
.hero__slider .slick-list,
.hero__slider .slick-track {
  height: 100%;
}

.hero__slide {
  position: relative;
  height: 100%;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.hero__slide::before {
  content: '';
  position: absolute;
  inset: 0;
  background-color: rgba(13, 8, 1, 0.55);
  z-index: 1;
}

.hero__slide-inner {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  padding: 0 var(--gap);
}

.hero__slide-content {
  max-width: 900px;
}

/* ===== Hero Slider Arrows ===== */
.hero .slick-prev,
.hero .slick-next {
  position: absolute;
  bottom: 40px;          /* отступ от низа, подберите под вашу цепь */
  top: auto;              /* отключаем верхнее позиционирование */
  transform: none;        /* отключаем центрирование по вертикали */
  z-index: 1020;
  width: 60px;
  height: 60px;
  background-color: rgba(253, 82, 38, 0.8);
  border-radius: 50%;
  transition: background-color 0.25s ease;
}

.hero .slick-prev {
  left: 14%;
}

.hero .slick-next {
  right: 14%;
}

.hero .slick-prev::before,
.hero .slick-next::before {
  font-size: 30px;
  color: var(--color-white);
  opacity: 1;
}

.hero .slick-prev:hover,
.hero .slick-next:hover {
  background-color: var(--color-accent);
}

.hero__title {
  font-family: 'RadiotechnikaRegular', Arial, Helvetica, sans-serif;
  font-size: 3rem;
  line-height: 1.15;
  margin-bottom: 1rem;
  text-shadow: 0 2px 6px rgba(0, 0, 0, 0.5);
}

.hero__subtitle {
  font-family: 'RadiotechnikaRegular', Arial, Helvetica, sans-serif;
  font-size: 1.25rem;
  color: var(--color-hover);
  margin-bottom: 2rem;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.5);
}

.hero__cta {
  position: absolute;
  bottom: 150px;
  left: 0;
  width: 100%;
  z-index: 10;
}

.hero__actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

@media (max-height: 785px) {
  .hero__actions {
    display: none !important;
  }
}

.hero__chain {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 500%;
  height: 100px;
  background-image: url('./../assets/img/hero_chain.png');
  background-repeat: repeat-x;
  background-size: auto 100%;
  z-index: 5;
  transition: transform 0.6s ease;
  will-change: transform;
}

.hero .slick-dots {
  bottom: 110px;
  z-index: 10;
}

.hero .slick-dots li button::before {
  color: var(--color-white);
  font-size: 12px;
  opacity: 0.6;
}

.hero .slick-dots li.slick-active button::before {
  color: var(--color-accent);
  opacity: 1;
}

/* ===== Cursor chain ===== */
#cursor-chain {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 9900;
  pointer-events: none;
}

.cursor-chain__link_nechet {
  background-image: url('./../assets/img/cursor-chain__link_nechet.png');
    z-index: 9910;
}

.cursor-chain__link_chet {
  background-image: url('./../assets/img/cursor-chain__link_chet.png');
    z-index: 9905;
}

/* Общие стили для всех звеньев */
.cursor-chain__link_nechet,
.cursor-chain__link_chet {
  position: absolute;
  top: 0;
  left: 0;
  width: 60px;
  height: 60px;
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  will-change: transform;
}

/*.cursor-chain__link:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 50%;
  bottom: -7px;
  transform: translateX(-50%);
  width: 5px;
  height: 6px;
  background-color: var(--color-text);
  border-radius: 2px;
}
*/

/* ===== Side decorative chains ===== */
.side-chain {
  position: absolute;
  top: 0;
  width: 15%;
  max-width: 180px;
  height: 100%;
  background-image: url('https://placehold.co/120x1200/4d4d4d/fd5226?text=Chain');
  background-repeat: repeat-y;
  background-size: 100% auto;
  background-position: center top;
  pointer-events: none;
  opacity: 0.45;
  z-index: 1;
  will-change: transform;
}

.side-chain--left {
  left: 0;
}

.side-chain--right {
  right: 0;
  transform: scaleX(-1);
}

/* ===== Products ===== */
.products {
  padding: 5rem 0;
  height: 90vh;
}

.products__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--gap);
}

.product-card {
  background-color: var(--color-hover);
  padding: 1.5rem;
  border-radius: var(--radius);
  transition: transform var(--transition), box-shadow var(--transition);
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.product-card__title {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
  color: var(--color-text);
}

.product-card__desc {
  color: var(--color-text);
  opacity: 0.85;
}

/* ===== About ===== */
.about {
  position: sticky;
  top: var(--stick-top, 0px);
  min-height: calc(100vh - var(--header-h, 70px));
  background-color: var(--color-block);
  color: var(--color-hover);
  width: 100%;
  z-index: 35;
}

.about__subsection {
  margin-bottom: 2rem;
}

.about__subsection h3 {
  font-family: 'RadiotechnikaRegular', Arial, Helvetica, sans-serif;
  font-size: 1.5rem;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}

.about__facts {
  font-family: 'RadiotechnikaRegular', Arial, Helvetica, sans-serif;
  margin-top: 2rem;
  padding: 1.25rem;
  background-color: var(--color-text);
  color: var(--color-hover);
  border-radius: var(--radius);
  text-align: center;
  font-weight: 700;
}

/* ===== Clients ===== */
.clients {
  position: sticky;
  top: var(--stick-top, 0px);
  min-height: calc(100vh - var(--header-h, 70px));
  padding: 5rem 0;
  background-color: var(--color-bg);
  z-index: 55;
}

.clients__subsection {
  margin-bottom: 2rem;
  padding: 1.5rem;
  background-color: var(--color-hover);
  border-radius: var(--radius);
}

.clients__subsection h3 {
  font-family: 'RadiotechnikaRegular', Arial, Helvetica, sans-serif;
  font-size: 1.5rem;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}

.contacts {
  background-color: var(--color-block);
  color: var(--color-white);
}

.contacts h3 {
  color: var(--color-accent);
}

.contacts a:hover {
  color: var(--color-accent);
}

.form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1rem;
  max-width: 500px;
}

.form input,
.form textarea {
  padding: 0.75rem;
  border: 1px solid #ccc;
  border-radius: var(--radius);
  background-color: var(--color-white);
  color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form input:focus,
.form textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(253, 82, 38, 0.25);
}

.form textarea {
  min-height: 120px;
  resize: vertical;
}

.requisites {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

/* ===== Footer ===== */
.footer {
  position: relative;
  background-color: var(--color-text);
  color: var(--color-white);
  padding: 3rem 0;
  width: 100%;
  z-index: 60;
}

.footer__container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--gap);
}

.footer__copy,
.footer__contacts,
.footer__socials,
.footer__nav {
  flex: 1 1 200px;
}

.footer a {
  display: inline-block;
  margin-bottom: 0.35rem;
}

.footer a:hover {
  color: var(--color-accent);
}

.footer__nav {
  display: flex;
  flex-direction: column;
}

/* ===== Responsive ===== */
@media (max-width: 1150px) {
  :root {
    --gap: 16px;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .header__container {
    flex-wrap: wrap;
  }

  .hamburger {
    display: flex;
  }

  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--color-block);
    padding: 1rem var(--gap);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.25);
  }

  .nav--open {
    display: block;
  }

  .nav__list {
    flex-direction: column;
    gap: 1rem;
  }

  .header__contacts {
    display: none;
  }

  .hero__title {
    font-size: 2rem;
  }

  .hero__subtitle {
    font-size: 1.1rem;
  }

  .hero__cta {
    bottom: 130px;
  }

  .hero__chain {
    height: 60px;
  }

  .hero .slick-dots {
    bottom: 90px;
  }

  .side-chain {
    width: 10%;
    max-width: 80px;
    opacity: 0.35;
  }

  .products__grid {
    grid-template-columns: 1fr;
  }

/*   .about,
  .products,
  .clients {
    padding: 3rem 0;
  } */

  .footer__container {
    flex-direction: column;
  }

  #cursor-chain {
    display: none !important;
  }

}

@media (max-width: 450px) {
  .hero__title {
    font-size: 1.7rem;
  }
}

/* @media (max-width: 1400px) {
  .catalog__grid {
  margin-left: 1%;
  margin-right: 15%;
  }
} */

/* ===== Catalog ===== */
.catalog {
  position: sticky;
  top: var(--stick-top, 0px);
  min-height: calc(100vh - var(--header-h, 70px));
  background-color: var(--color-bg);
  z-index: 25;
}

.catalog__container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 5rem var(--gap);
}

.catalog__title {
  font-family: 'RadiotechnikaRegular', Arial, Helvetica, sans-serif;
  font-size: 2.5rem;
  text-align: center;
  margin-bottom: 2rem;
/*   padding: 5rem 0; */
  color: var(--color-text);
}

.catalog__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--gap);
}

.category-card {
  background-color: var(--color-hover);
  padding: 1.5rem;
  border-radius: var(--radius);
  text-align: center;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
}

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.category-card__icon {
  width: 110px;
  height: 110px;
  margin: 0 auto 1rem;
  object-fit: contain;
}

.category-card__title {
  font-family: 'RadiotechnikaRegular', Arial, Helvetica, sans-serif;
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
  color: var(--color-text);
}

.category-card__desc {
  color: var(--color-text);
  opacity: 0.85;
  font-size: 0.95rem;
}

/* ===== Modal ===== */
.modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 200;
  align-items: center;
  justify-content: center;
}

.modal--open {
  display: flex;
}

.modal__overlay {
  position: absolute;
  inset: 0;
  background-color: rgba(13, 8, 1, 0.75);
  cursor: pointer;
}

.modal__content {
  position: relative;
  z-index: 1;
  width: 90%;
  max-width: 900px;
  max-height: 90vh;
  overflow-y: auto;
  background-color: var(--color-hover);
  border-radius: var(--radius);
  padding: 2rem;
}

.modal__close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 36px;
  height: 36px;
  background-color: var(--color-accent);
  color: var(--color-white);
  border: none;
  border-radius: 50%;
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  transition: background-color var(--transition);
}

.modal__close:hover {
  background-color: #e0441d;
}

.modal__title {
  font-family: 'RadiotechnikaRegular', Arial, Helvetica, sans-serif;
  font-size: 1.75rem;
  margin-bottom: 1.5rem;
  color: var(--color-text);
}

.modal__products {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.product-item {
  background-color: var(--color-white);
  padding: 1rem;
  border-radius: var(--radius);
  border-left: 4px solid var(--color-accent);
}

.product-item__name {
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

.product-item__spec {
  font-size: 0.9rem;
  color: var(--color-text);
  opacity: 0.85;
  margin-bottom: 0.25rem;
}

.product-item__btn {
  margin-top: 0.75rem;
  width: 100%;
}

/* Catalog responsive */
@media (max-width: 768px) {
  .catalog {
    padding: 3rem 0;
  }

  .catalog__title {
    font-size: 1.75rem;
  }

  .catalog__grid {
    grid-template-columns: 1fr;
  }

  .modal__content {
    width: 95%;
    padding: 1.5rem;
  }

  .modal__products {
    grid-template-columns: 1fr;
  }
}

/* ===== Sticky request button ===== */
.sticky-request-btn {
  position: fixed;
  left: 24px;
  bottom: 24px;
  z-index: 90;
  padding: 0.875rem 1.25rem;
  background-color: var(--color-accent);
  color: var(--color-white);
  border: none;
  border-radius: var(--radius);
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.25);
  transition: background-color var(--transition), transform var(--transition);
}

.sticky-request-btn:hover {
  background-color: #e0441d;
  transform: translateY(-2px);
}

/* ===== Request form modal ===== */
.request-modal {
  z-index: 200;
}

.request-modal__content {
  max-width: 560px;
  padding: 2rem;
}

.request-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 1rem;
}

.request-form.is-hidden {
  display: none;
}

.form-group {
  display: flex;
  flex-direction: column;
  text-align: left;
}

.form-group label {
  margin-bottom: 0.35rem;
  font-weight: 600;
  color: var(--color-text);
}

.form-group input,
.form-group textarea {
  padding: 0.75rem;
  border: 1px solid #ccc;
  border-radius: var(--radius);
  background-color: var(--color-white);
  color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(253, 82, 38, 0.25);
}

.form-group input.is-invalid,
.form-group textarea.is-invalid {
  border-color: #d32f2f;
}

.required {
  color: var(--color-accent);
}

.error-message {
  display: none;
  margin-top: 0.25rem;
  font-size: 0.85rem;
  color: #d32f2f;
}

.form-group--honeypot {
  position: absolute;
  left: -9999px;
  opacity: 0;
}

.error-message.is-visible {
  display: block;
}

.file-list {
  margin-top: 0.5rem;
  padding-left: 1.2rem;
  font-size: 0.9rem;
  color: var(--color-text);
}

.file-list li {
  margin-bottom: 0.25rem;
}

.request-form__submit {
  margin-top: 0.5rem;
}

.request-success {
  text-align: center;
  padding: 1rem;
}

.request-success p {
  font-size: 1.1rem;
  margin-bottom: 1rem;
  color: var(--color-text);
}

.request-success[hidden] {
  display: none;
}

/* ===== Privacy policy page ===== */
.privacy {
  padding: 5rem 0;
  min-height: 60vh;
}

.privacy__container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--gap);
}

.privacy__title {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
  color: var(--color-text);
}

.privacy__container p {
  margin-bottom: 1rem;
  color: var(--color-text);
}

/* Responsive for request form and sticky button */
@media (max-width: 768px) {
  .sticky-request-btn {
    left: 12px;
    bottom: 12px;
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
  }

  .request-modal__content {
    width: 95%;
    padding: 1.5rem;
  }

  .privacy {
    padding: 3rem 0;
  }

  .privacy__title {
    font-size: 1.75rem;
  }
}

/* ===== FAQ accordion ===== */
.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1rem;
}

.faq-item {
  background-color: var(--color-white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 2px 6px rgba(13, 8, 1, 0.08);
}

.faq-question {
  width: 100%;
  padding: 1rem 1.25rem;
  text-align: left;
  background: none;
  border: none;
  font-weight: 600;
  font-size: 1rem;
  color: var(--color-text);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  transition: background-color var(--transition);
}

.faq-question::after {
  content: '+';
  flex-shrink: 0;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--color-accent);
  transition: transform var(--transition);
}

.faq-question:hover,
.faq-question:focus {
  background-color: var(--color-hover);
}

.faq-question:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: -2px;
}

.faq-item.is-open .faq-question::after {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  opacity: 0;
  transform: translateY(-8px);
  overflow: hidden;
  transition: max-height 0.35s ease, opacity 0.35s ease, transform 0.35s ease;
}

.faq-item.is-open .faq-answer {
  max-height: 1000px;
  opacity: 1;
  transform: translateY(0);
}

.faq-answer p {
  padding: 0 1.25rem 1.25rem;
  margin: 0;
  line-height: 1.6;
  color: var(--color-text);
}

/* ===== Side decorative chains (CSS-only) ===== */
.chain {
  position: absolute;
  top: 0;
  width: 100px;
  height: calc(100% + 0px);
  background-repeat: repeat-y;
  background-size: 100% auto;
  background-position: center top;
  z-index: 500;
  pointer-events: none;
}

.chain--left {
  left: 0;
}

.chain--right {
  right: 0;
  transform: scaleX(-1);
}

.chain--catalog {
  top: -2000px;
  height: calc(100% + 2000px);
  width: 30px;
  background-image: url('./../assets/img/side_chain.png');
}

.chain--about {
  top: -3500px;
  height: calc(100% + 3500px);
  width: 30px;
  background-image: url('./../assets/img/side_chain.png');
}

.chain--clients {
  top: -5500px;
  height: calc(100% + 5500px);
  width: 30px;
  background-image: url('./../assets/img/side_chain.png');
}

/* Определяем переменные для отступов */
.chain--catalog {
  --chain-offset-left: 70px;
  --chain-offset-right: 70px;
}
.chain--about {
  --chain-offset-left: 40px;
  --chain-offset-right: 40px;
}
.chain--clients {
  --chain-offset-left: 10px;
  --chain-offset-right: 10px;
}

/* Применяем переменные к левой и правой цепи */
.chain--left {
  left: var(--chain-offset-left, 0);
}
.chain--right {
  right: var(--chain-offset-right, 0);
}


@media (max-width: 765px) {
  .chain {
    display: none !important;
  }
}