* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
  
body {
  font-family: Arial, sans-serif;
}

img {
  vertical-align: middle;
}

a {
  text-decoration: none;
}

.mb-20 {
  margin-bottom: 20px;
}

.main-header {
  position: relative;
  display: flex;
  align-items: center;
  padding: 12px 20px;
}

.main-header--fixed {
  position: fixed;
  width: 100%;
  top: 0;
  left: 0;
  z-index: 1000;
  background-color: #fff;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.main-header--shadow {
  background-color: #fff;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.main-header__logo-wrap {
  margin-right: auto;
}

.main-header__logo {
  height: 30px;
}

.main-header__navbar {
  display: flex;
  align-items: center;
  margin-left: auto;
}

.main-header__burger {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.main-header__burger-item {
  width: 30px;
  background-color: #000;
  height: 3px;
}

.main-header__menu {
  position: absolute;
  top: 100%;
  right: 0;
  left: 0;
  z-index: 5;
  background-color: #fff;
  display: none;
  flex-direction: column;
  list-style: none;
  text-align: center;
  padding: 20px 0;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.main-header__menu.active {
  display: flex;
}

.main-header__menu-link {
  display: block;
  color: #000;
  font-size: 14px;
  font-weight: bold;
  padding: 12px;
}

.main-header__menu-link:hover {
  color: #1aada4;
}

.main-header__menu-btn {
  display: block;
  margin: 12px auto;
  width: 80%;
  text-align: center;
  padding: 10px 20px;
  background-color: #1aada4;
  color: #fff;
  border-radius: 5px;
  text-decoration: none;
  font-size: 14px;
  font-weight: bold;
  transition: background-color 0.3s ease;
}

.main-header__menu-btn:hover {
  background-color: #138e8a;
}

.discount-section {
  position: relative;
  background: url(images/discount_power_bank.webp) no-repeat center center / cover;
  height: calc(100vh - 54px);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 20px;
}

.discount-section:before {
  content: "";
  position: absolute;
  z-index: 1;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background: rgba(0, 0, 0, 0.6);
}

.discount-section__container {
  position: relative;
  z-index: 2;
  max-width: 600px;
}

.discount-section__title {
  font-size: 32px;
  font-weight: bold;
  margin-bottom: 20px;
}

.discount-section__content {
  font-size: 18px;
  line-height: 1.5;
  margin-bottom: 30px;
}

.discount-section__btn {
  display: inline-block;
  padding: 12px 24px;
  font-size: 16px;
  font-weight: bold;
  background-color: #1aada4;
  color: #fff;
  transition: background-color 0.3s ease;
  border-radius: 40px;
}

.discount-section__btn:hover {
  background-color: #138e8a;
}

.about-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 20px;
}

.about-section__container {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 48px;
}

.about-section__content {
  text-align: center;
}

.about-section__title {
  font-size: 36px;
  font-weight: bold;
  margin-bottom: 20px;
}

.about-section__content-text {
  font-size: 18px;
  line-height: 1.6;
}

.about-section__image img {
  max-width: 100%;
  height: auto;
  transform: rotate(180deg);
}

.about-section__features {
  display: flex;
  flex-direction: column;
  gap: 30px;
}

.about-section__feature {
  background: #f5f5f5;
  width: 100%;
  padding: 20px;
  text-align: center;
  border-radius: 10px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.about-section__feature-icon {
  font-size: 40px;
  margin-bottom: 16px;
}

.about-section__feature-title {
  font-size: 22px;
  font-weight: bold;
  margin-bottom: 16px;
}

.about-section__feature-text {
  font-size: 16px;
  line-height: 1.5;
}

.catalog-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

.catalog-section__header {
  margin-bottom: 30px;
  text-align: center;
}

.catalog-section__header-title {
  font-size: 30px;
  font-weight: bold;
  margin-bottom: 16px;
}

.catalog-section__header-text {
 font-size: 18px;
 color: #555;;
}

.catalog-section__products {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.сatalog-section__products-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  background-color: #fff;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease;
  text-align: center;
  padding: 20px;
}

.сatalog-section__products-card:hover {
  transform: translateY(-5px);
}

.сatalog-section__products-card-image {
  max-width: 100%;
  height: 240px;
  transform: rotate(180deg);
}

.сatalog-section__products-card-title {
  font-size: 18px;
  margin: 12px 0 16px;
  font-weight: bold;
  color: #000;
}

.сatalog-section__products-card-description {
  color: grey;
  margin-bottom: 12px;
}

.сatalog-section__products-card-price {
  color: #1aada4;
  font-size: 22px;
  font-weight: bold;
  margin-bottom: 8px;
}

.сatalog-section__products-card-btn {
  display: inline-block;
  padding: 10px 20px;
  background-color: #1aada4;
  color: #fff;
  border-radius: 5px;
  text-decoration: none;
  margin-top: auto;
  font-weight: bold;
  transition: background-color 0.3s ease;
}

.сatalog-section__products-card-btn:hover {
  background-color: #138e8a;
}

.сatalog-section__products-card-old-price {
  text-decoration: line-through;
  color: #888;
  font-size: 18px;
}

.review-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 20px;
}

.review-section__title {
  text-align: center;
  font-size: 30px;
  font-weight: bold;
  margin-bottom: 20px;
}

.review-section__subtitle {
  text-align: center;
  font-size: 18px;
  color: #555;
  margin-bottom: 40px;
}

.review-section__reviews {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
}

.review-section__reviews-card {
  display: flex;
  flex-direction: column;
  background: #ffffff;
  border-radius: 10px;
  padding: 30px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  text-align: center;
}

.review-section__reviews-card-stars {
  color: #f4c542;
  margin-bottom: 16px;
}

.review-section__reviews-card-text {
  font-size: 16px;
  line-height: 1.5;
  margin-bottom: 16px;
}

.review-section__reviews-card-author {
  font-size: 18px;
  font-weight: bold;
  margin-top: auto;
  margin-bottom: 4px;
}

.review-section__reviews-card-location {
  font-size: 16px;
  color: #888;
}

.faq-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 20px;
}

.faq-section__title {
  text-align: center;
  font-size: 28px;
  font-weight: bold;
  margin-bottom: 30px;
}

.faq-section__wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 30px;
}

.faq-section__content,
.faq-section__accordion {
  min-width: 100%;
}

.faq-section__subtitle {
  font-size: 28px;
  margin-bottom: 20px;
}

.faq-section__accordion-item {
  background: #fff;
  border-radius: 5px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  margin-bottom: 15px;
  overflow: hidden;
}

.faq-section__accordion-item-question {
  background: #1aada4;
  color: #fff;
  padding: 16px 20px;
  font-size: 18px;
  font-weight: bold;
  cursor: pointer;
  position: relative;
}

.faq-section__accordion-item-question:after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 20px;
  transform: translateY(-50%);
  font-size: 24px;
  transition: transform 0.3s ease;
}

.faq-section__accordion-item.active .faq-section__accordion-item-question:after {
  content: "-";
}

.faq-section__accordion-item-answer {
  display: none;
  padding: 16px 20px;
  font-size: 16px;
  background: #fff;
  border-top: 1px solid #ccc;
}

.faq-section__accordion-item.active .faq-section__accordion-item-answer {
  display: block;
}

.contacts-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 20px;
}

.contacts-section__title {
  text-align: center;
  margin-bottom: 40px;
  font-size: 36px;
  font-weight: bold;
}

.contacts-section__wrapper {
  display: flex;
  flex-direction: column;
  flex-wrap: wrap;
  gap: 30px;
  align-items: center;
  justify-content: space-between;
}

.contacts-section__map,
.contacts-section__info {
  flex: 1;
  min-width: 100%;
}

.contacts-section__map iframe {
  width: 100%;
  height: 400px;
  border-radius: 10px;
  border: none;
}

.contacts-section__info {
  flex: 1;
  background: #fff;
  padding: 32px;
  border-radius: 10px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.contacts-section__subtitle {
  font-size: 24px;
  font-weight: bold;
  margin-bottom: 20px;
}

.contacts-section__text,
.contacts-section__link {
  font-size: 16px;
}

.contacts-section__text {
  margin-bottom: 12px;
}

.contacts-section__link {
  color: #1aada4;
  text-decoration: none;
  font-weight: bold;
}

.contacts-section__btn {
  display: inline-block;
  padding: 16px 32px;
  font-weight: bold;
  background-color: #1aada4;
  color: #fff !important;
  text-decoration: none;
  font-size: 16px;
  border-radius: 5px;
  transition: background-color 0.3s ease;
}

.contacts-section__btn:hover {
  text-decoration: underline;
}

.main-footer {
  background-color: #1a1a1a;
  padding: 48px 20px;
}

.main-footer__container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  padding: 20px;
  flex-direction: column;
  text-align: center;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 30px;
}

.main-footer__section {
  flex: 1 1 100%;
  min-width: 280px;
}

.main-footer h2,
.main-footer h3,
.main-footer p {
  margin-bottom: 16px;
  color: #fff;
}

.main-footer a {
  text-decoration: underline;
  color: #fff;
  transition: color 0.3s ease;
}

.main-footer .main-footer__btn {
  display: inline-block;
  padding: 16px 32px;
  background-color: #1aada4;
  color: #fff;
  width: 100%;
  border-radius: 5px;
  text-decoration: none;
  font-weight: bold;
  transition: background-color 0.3s ease;
}

.main-footer__section-menu {
  list-style: none;
  padding: 0;
}

.main-footer__section-menu li {
  margin-bottom: 10px;
}

.main-footer__social-title {
  text-align: center;
}

.main-footer__social {
  display: flex;
  gap: 15px;
  align-items: center;
  justify-content: center;
}

.main-footer .main-footer__social-link {
  display: inline-block;
  transition: transform 0.3s ease;
}

.main-footer .main-footer__social-link:hover {
  transform: scale(1.1);
}

.main-footer__copyright {
  text-align: center;
  margin-top: 40px;
  border-top: 1px solid #444;
  padding-top: 20px;
}



@media (min-width: 992px) {

  .main-header {
    padding: 12px 32px;
  }
  
  .main-header__burger {
    display: none;
  }

  .main-header__menu {
    position: relative;
    top: auto;
    right: auto;
    left: auto;
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 24px;
    padding: 0;
    box-shadow: none;
  }

  .main-header__menu-btn {
    margin: 0;
    width: auto;
  }

  .discount-section {
    height: calc(100vh - 64px);
  }

  .discount-section__title {
    font-size: 48px;
  }

  .discount-section__content {
    font-size: 20px;
  }

  .discount-section__btn {
    padding: 16px 32px;
    font-size: 18px;
  }

  .about-section__container {
    flex-direction: row;
    gap: 30px;
  }

  .about-section__content {
    flex-grow: 1;
    width: 100%;
    text-align: left;
  }

  .about-section__image  {
    flex-grow: 1;
    width: 100%;
  }

  .about-section__features {
    flex-direction: row;
  }

  .catalog-section__header-title {
    font-size: 36px;
  }

  .catalog-section__header-subtitle {
    font-size: 20px;
  }
  
  .сatalog-section__products-card {
    width: calc(50% - 15px);
  }

  .review-section__title {
    font-size: 36px;
  }

  .review-section__reviews-card {
    width: calc(50% - 15px);
  }

  .faq-section__title {
    font-size: 36px;
  }

  .faq-section__content {
    flex: 1;
    min-width: 300px;
  }

  .faq-section__accordion {
    flex: 2;
    min-width: 500px;
  }

  .contacts-section__wrapper {
    flex-direction: row;
  }

  .contacts-section__map,
  .contacts-section__info {
    min-width: 45%;
  }

  .contacts-section__subtitle {
    font-size: 28px;
  }

  .contacts-section__text,
  .contacts-section__link {
    font-size: 18px;
  }

  .contacts-section__btn {
    font-size: 18px;
  }

  .main-footer__container {
    flex-direction: row;
    text-align: left;
  }

  .main-footer .main-footer__btn {
    width: auto;
  }

  .main-footer__section {
    flex: 1 1 calc(33.333% - 30px);
  }

}

@media (min-width: 1200px) {
  
  .сatalog-section__products-card {
    width: calc(25% - 15px);
  }

  .review-section__reviews-card {
    width: calc(25% - 15px);
  }

}