:root {
  --nav1: #111111;
  --nav2: gray;
  --text1: white;
  --text2: black;
  --price1: rgb(244, 244, 244);
  --border1: #ffffff;
  --border2: #111111;
  --hover1: #292929;
  --hover2: #c2c2c2;
  --hover3: #535353;
  --icon1: white;
  --range1: #DBDBDB;
  --range2: #888888;
  --itemBackground: #222222;
  --itemBox: #181818;
}

* {
  box-sizing: border-box;
  font-family: sans-serif 'Times New Roman';
  transition: background-color 0.3s, color 0.3s, border-color 0.3s;
}

html, body {
  margin: 0;
  overflow-x: hidden;
}

/* nav panel*/

.nav {
  display: flex;
  align-items: center;
  width: 100%;
  padding: 0 20px;
  height: 8vh;
  background-color: var(--nav1);
  border-bottom: 2px var(--border1) solid;
  gap: 30px;
  position: sticky;
  top: 0;
  z-index: 10;
}

.menu {
  flex: 0 0 auto;
  height: 50px;
  width: 50px;
  border-radius: 50%;
  border: var(--border1) 2px solid;
  background-color: var(--1);
  color: var(--text1);
  font-size: 13px;
}

.menu:hover {
    cursor: pointer;
}

.name {
  font-size: 40px;
  color: var(--text1);
  font-family: fantasy;
}

.catalog {
  width: 120px;
  height: 40px;
  color: var(--text1);
  background-color: var(--nav1);
  border-radius: 8px;
  border: 2px solid var(--border1);
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: background 0.3s;
  font-size: 17px;
}

.catalog-icon {
  display: flex;
}

.catalog:hover {
  cursor: pointer;
  background-color: var(--hover1);
}

.catalog-list {
  position: fixed;
  left: 14vh;
  top: 55px;
  width: 80vh;
  height: 25vh;
  background-color: var(--nav1);
  z-index: 20;
  border: 2px solid var(--border1);
  border-radius: 5px;
  overflow-y: hidden;
  transition: opacity 0.3s ease, transform 0.3s ease;
  opacity: 0;
  transform: scale(0.95) translateY(-10px);
  pointer-events: none;
  color: var(--text1);
  font-style: none;
  font-size: 18px;
  font-weight: 600;
  display: flex;
  flex-direction: row;
}

.catalog-list-left {
  display: flex;
  position: relative;
  flex-direction: column;
  width: 25vh;
  height: 100%;
  background-color: var(--itemBox);
}

.catalog-item {
  margin-top: 4px;
  cursor: pointer;
  width: 25vh;
  display: flex;
  align-items: center;
  gap: 5px;
}

.catalog-item img {
  width: 20px;
  height: 20px;
  display: block;
}

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

.catalog-list-center {
  width: 30vh;
  height: 100%;
  background-color: var(--itemBox);
  color: var(--text1);
}

.catalog-item-center {
  width: 30vh;
  opacity: 0;
  transition: opacity 0.3s;
  display: flex;
  position: absolute;
  flex-direction: column;
  top: 0;
  left: 0;
  pointer-events: none;
}

.catalog-list-center-item {
  position: relative;
  display: flex;
  flex-direction: column;
}

.catalog-item-center.active {
  opacity: 1;
  transform: scale(1) translateY(0);
  pointer-events: auto;
}

.catalog-list-right {
  overflow: hidden;
  position: relative;
  width: 25vh;
  height: 100%;
  background-color: var(--itemBox);
  color: var(--text1);
}

.catalog-item-right {
  width: 100%;
  opacity: 0;
  transition: opacity 0.3s;
  display: flex;
  position: absolute;
  flex-direction: column;
  top: 0;
  left: 0;
  pointer-events: none;
  cursor: pointer;
}

.catalog-item-right.active {
  opacity: 1;
  transform: scale(1) translateY(0);
  pointer-events: auto;
}

.catalog-item:hover {
  background-color: var(--hover3);
}

.catalog-list.active {
  opacity: 1;
  transform: scale(1) translateY(0);
  pointer-events: auto;
}

.center {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  max-width: 700px;
  width: 100%;
}

.before-src-input {
  flex: 0 0 auto;
}

.src_input {
  flex: 1;
  min-width: 0;
  height: 40px;
  background-color: var(--nav1);
  color: var(--text1);
  border: none;
  border-bottom: 2px solid var(--border1);
}

.src_but {
  flex: 0 0 auto;
  background-color: var(--nav1);
  color: var(--text1);
  font-weight: 600;
  padding: 0 15px;
  height: 40px;
  border: 2px solid var(--border1);
  border-radius: 5px;
  transition: background 0.3s;
  font-size: 17px;
  white-space: nowrap;
}

.src_but:hover {
  cursor: pointer;
  background-color: var(--hover1);
}

#suggestions {
  position: absolute;
  top: 50px;
  left: 56%;
  transform: translateX(-50%);
  width: 400px;

  background: var(--nav1);
  border: 2px solid var(--border1);
  border-radius: 8px;

  display: none;
  z-index: 999;
}

.suggestion-item {
  display: flex;
  align-items: center;
  gap: 10px;
  z-index: 1000;
  padding: 6px;
  cursor: pointer;
  border-bottom: 2px solid var(--border1);
}

.suggestion-item:hover {
  background: var(--hover1);
}

.suggestion-item img {
  width: 45px;
  height: 45px;
  object-fit: cover;
}

.suggestion-name {
  font-weight: 600;
  color: var(--text1);
}

.suggestion-price {
  font-size: 14px;
  color: var(--price1);
}

.mobile-menu-btn {
  display: none;
  width: 35px;
  height: 35px;
  align-items: center;
  justify-content: center;
  background: none;
  border: 2px solid var(--border1);
  border-radius: 6px;
  color: var(--text1);
  transition: background 0.3s;
}

.mobile-menu-btn img {
  width: 25px;
  height: 25px;
  display: block;
  object-fit: contain;
  position: relative;
  left: -2px;
}

.mobile-menu-btn:hover {
  cursor: pointer;
  background-color: var(--hover1);
}

.right {
  display: flex;
  gap: 30px;
  margin-left: 5px;
}

.right-btn {
  width: 35px;
  height: 35px;
  border-radius: 6px;
  background-color: var(--nav1);
  color: var(--element-nav3);
  border: 2px solid var(--border1);
  transition: background 0.3s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.right-btn:hover {
  cursor: pointer;
  background-color: var(--hover1);
}

.img-btn {
  display: block;
  transition: filter 0.3s;
}

.light-icons .img-btn {
  filter: invert(1);
}

/* left panel */

.page {
  display: flex;
  min-width: 0;
}

.left-panel {
  width: 280px;
  height: calc(100vh - 8vh);
  background: var(--nav1);
  border-right: 2px solid var(--border1);
  padding: 16px;
  overflow-y: auto;
}

.filter {
  padding: 12px 0;
  border-bottom: 2px solid var(--border1);
}

.filter-title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text1);
  text-align: center;
}

/* price */

.range-slider {
  position: relative;
  height: 32px;
}

.range-slider input[type="range"] {
  position: absolute;
  left: 0;
  top: 20%;
  width: 100%;
  pointer-events: none;
  background: none;
  -webkit-appearance: none;
}

.range-slider input::-webkit-slider-thumb {
  -webkit-appearance: none;
  pointer-events: auto;
  width: 16px;
  height: 16px;
  background: var(--range2);
  border-radius: 50%;
  cursor: pointer;
}

.range-slider input::-webkit-slider-runnable-track {
  height: 6px;
  background: transparent;
}

.slider-track {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  height: 6px;
  width: 100%;
  background: var(--range1);
  border-radius: 3px;
}

.price-inputs {
  display: flex;
  position: relative;
  align-items: center;
  justify-content: center;
  gap: 1vh;
}

.price-inputs input {
  width: 12vh;
  height: 3vh;
  border: var(--border1) solid 2px;
  border-radius: 5px;
  background-color: var(--nav1);
  color: var(--text1);
}

.price-inputs span {
  color: var(--text1);
}

/* checkboxes */

.checkbox {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  cursor: pointer;
  margin-bottom: 8px;
  color: var(--text1);
  font-weight: 600;
}

.checkbox input {
  width: 18px;
  height: 18px;
}

/* about-us */

.about-us {
  display: flex;
  position: relative;
  flex-direction: column;
  gap: 5px;
  align-items: center;
}

.title-about-us {
  color: var(--text1);
}

.tech-support {
  width: 95%;
  height: 40px;
  color: var(--text1);
  background-color: var(--nav1);
  border-radius: 8px;
  border: none;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 17px;
  cursor: pointer;
  margin-bottom: 4vh;
}

.about-us-img-tech {
  width: 4.5vh;
  height: 4.5vh;
}

.about-us-btn {
  width: 70%;
  height: 6vh;
  background-color: var(--nav1);
  border: none;
  display: flex;
  position: relative;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: transform 1s ease;
  cursor: pointer;
  overflow: hidden;
  left: 6vh;
}

.about-us-btn label {
  transform: translateX(40px);
  opacity: 0;
  transition: all 1s ease;
  white-space: nowrap;
  color: var(--text1);
  transition-delay: 0.05s;
  font-weight: 600;
}

.about-us-btn:hover label {
  transform: translateX(0);
  opacity: 1;
}

.about-us-btn:hover {
  transform: translateX(-10vh);
}

.about-us-img {
  width: 5vh;
  height: 5vh;
}

/* main-page */

.products-area {
  flex: 1;
  background-color: var(--nav1);
  padding: 10px;
  overflow-y: auto;
  min-width: 0;
}

.products-list {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 7px;
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
}

.product-card {
  display: block;
  position: relative;
  height: 25%;
  min-height: 26vh;
  width: 100%;
  max-width: 145px;
  margin: 0 auto;
  color: var(--text2);
  background-color: var(--itemBackground);
  border-radius: 8px;
  text-align: center;
  border: 2px solid var(--border1);
  cursor: pointer;
  transition: background 0.3s;
}

.product-card:hover {
  background-color: var(--hover1);
}

.product-img {
  width: 120px;
  height: 120px;
  padding-top: 5px;
}

.product-name {
  margin: auto;
  margin-top: 1vh;
  color: var(--text1);
  width: 100%;
  height: 7px;
  padding-bottom: 8px;
  border-top: var(--border1) 2px solid;
}

.product-price {
  text-align: center;
  color: var(--price1);
  width: 100%;
  height: 7px;
  font-weight: 700;
  font-size: larger;
}

.card-btn {
  width: 4vh;
  height: 4vh;
  cursor: pointer;
  background-color: inherit;
  border: none;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.3s;
}

.card-btn:hover {
  background-color: var(--hover3);
}

.card-btn-img {
  display: block;
  left: -3px;
}

.card-btn,
.buy-btn {
  position: absolute;
  top: 155px;
}

.favorite-btn {
  left: 5px;
}

.buy-btn {
  right: 3px;
}

.favorite-btn.active .fav-img {
  filter: brightness(0) saturate(100%)
          invert(20%) sepia(95%)
          saturate(7500%) hue-rotate(355deg)
          brightness(95%);
  transform: scale(1.1);
}

/* alerts */

.alert-chat-wrap {
  position: fixed;
  right: 27vh;
  bottom: 20px;
  width: 36px;
  height: 36px;
}

.alert-chat {
  position: absolute;
  inset: 0;
  width: 30vh;
  height: 40px;
  border: 2px solid var(--border1);
  border-radius: 8px;
  background: var(--nav1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--text1);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.alert-chat::after {
  content: "";
  position: absolute;
  right: 4px;
  bottom: -7px;
  width: 9px;
  height: 11px;
  background: inherit;
  transform: rotate(45deg);
  border-radius: 2px;
  border-bottom: 2px solid var(--border1);
  border-right: 2px solid var(--border1);
}

.alert-chat.active {
  opacity: 1;
  transform: scale(1) translateY(0);
  pointer-events: auto;
}

.favorite-list-hover {
  position: fixed;
  right: 19.5vh;
  top: 55px;
  width: 26vh;
  height: 40vh;
  background-color: var(--nav1);
  z-index: 20;
  border: 2px solid var(--border1);
  border-radius: 5px;
  overflow-y: auto;
  transition: opacity 0.3s ease, transform 0.3s ease;
  opacity: 0;
  transform: scale(0.95) translateY(-10px);
  pointer-events: none;
}

.favorite-list-item {
  border-bottom: 2px solid var(--border1);
  width: 100%;
  height: 12vh;
  display: flex;
  align-items: center;
  gap: 5px;
  cursor: pointer;
}

.favorite-list-item img {
  width: 7vh;
  height: 7vh;
}

.favorite-list-hover.active {
  opacity: 1;
  transform: scale(1) translateY(0);
  pointer-events: auto;
}

.basket-list-hover {
  position: fixed;
  right: 10vh;
  top: 55px;
  width: 26vh;
  height: 40vh;
  background-color: var(--nav1);
  z-index: 20;
  border: 2px solid var(--border1);
  border-radius: 5px;
  overflow-y: auto;
  transition: opacity 0.3s ease, transform 0.3s ease;
  opacity: 0;
  transform: scale(0.95) translateY(-10px);
  pointer-events: none;
}

.basket-list-item {
  border-bottom: 2px solid var(--border1);
  width: 100%;
  height: 12vh;
  display: flex;
  align-items: center;
  gap: 5px;
  cursor: pointer;
}

.basket-list-item img {
  width: 7vh;
  height: 7vh;
}

.basket-list-hover.active {
  opacity: 1;
  transform: scale(1) translateY(0);
  pointer-events: auto;
}

/* account */

.register {
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.log-in {
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.register.active {
  opacity: 1;
  pointer-events: auto;
}

.log-in.active {
  opacity: 1;
  pointer-events: auto;
}

.account {
  width: 40vh;
  height: auto;
  min-height: 30vh;
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding: 20px;
  background-color: var(--itemBox);
  color: var(--text1);
  z-index: 100;
  border: 2px solid var(--border1);
  border-radius: 8px;
  gap: 16px;
  box-sizing: border-box;
}

.account-name {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0;
}

.account-container {
  display: flex;
  flex-direction: column;
  width: 100%;
  border-radius: 5px;
  gap: 12px;
  margin-top: 30%;
  padding: 1vh;
  background-color: var(--itemBackground);
}

.account-container label {
  display: flex;
  flex-direction: column;
  font-size: 0.9rem;
  color: var(--text1);
}

.account-container input {
  margin-top: 4px;
  padding: 6px 8px;
  border: 1px solid var(--border1);
  border-radius: 4px;
  font-size: 0.9rem;
}

.account-btn {
  padding: 8px 12px;
  border: none;
  background-color: var(--text1);
  color: var(--text2);
  font-weight: 600;
  border-radius: 4px;
  cursor: pointer;
}

.account-btn:hover {
  opacity: 0.9;
}

.account-a {
  font-size: 1rem;
  color: var(--text1);
  text-decoration: underline;
  cursor: pointer;
  margin-top: 8px;
}

.cancel {
  display: flex;
  position: absolute;
  top: 1vh;
  right: 1vh;
  background-color: inherit;
  border: none;
  cursor: pointer;
}

.cancel img {
  width: 2.5vh;
  height: 2.5vh;
}

.products-open {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.8);
  width: 55%;
  height: 60%;
  background-color: var(--itemBox);
  color: var(--text1);
  z-index: 100;
  border: var(--border1) 2px solid;
  border-radius: 8px;
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}

.img-container {
  position: absolute;
  transform: translate(0%, -50%);
  align-items: center;
  justify-content: center;
  top: 50%;
  width: 40%;
  height: 90%;
  left: 2vh;
  background-color: inherit;
  border: var(--border1) 2px solid;
  border-radius: 8px;
}

.name-price-container {
  position: absolute;
  right: 4vh;
  top: 6vh;
  text-align: start;
  font-size: larger;
  width: 50%;
  height: 40%;
  padding-left: 3vh;
  background-color: inherit;
  border: var(--border1) 2px solid;
  border-radius: 8px;
}

.fav-basket-container {
  position: absolute;
  right: 4vh;
  bottom: 6vh;
  justify-content: space-between;
  width: 50%;
  height: 40%;
  background-color: inherit;
}

.cancel-product {
  width: 3vh;
  height: 3vh;
  font-size: 3vh;
  color: var(--text1);
  position: absolute;
  top: 1vh;
  right: 1.5vh;
  cursor: pointer;
  transition: color 0.3s;
}

.cancel-product:hover {
  color: var(--hover2);
}

.products-open.active {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
  pointer-events: auto;
}

.fav-basket-container button {
  width: 10vh;
  height: 10vh;
  position: block;
  top: 5vh;
}

.fav-basket-container > button > img {
  width: 9vh;
  height: 9vh;
}

@media (max-width: 1200px) {
  .products-list {
    grid-template-columns: repeat(6, 1fr);
  }
}

@media (max-width: 1200px), (max-height: 700px) {
  .name {
    display: none !important;
  }

  body {
  padding-top: 8vh;
}

  .nav {
    display: flex;
    align-items: center;
    width: 100%;
    max-width: 100vw;
    padding: 0 10px;
    height: 8vh;
    background-color: var(--nav1);
    border-bottom: 2px var(--border1) solid;
    gap: 10px;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
  }

  .catalog {
    width: 35px;
    height: 35px;
    align-items: center;
    justify-content: center;
  }

  .catalog-icon {
    width: 23px;
    height: 23px;
    display: block;
    object-fit: contain;
    position: relative;
    left: -2.5px;
    top: -1px;
  }

  .catalog-name {
    display: none;
  }

  .catalog-list {
    position: fixed;
    top: 60px;
    left: 50%;
    transform: translate(-50%, -10px) scale(0.95);
    width: 95vw;
    height: 22.5vh;
    display: flex;
    flex-direction: row;
    opacity: 0;
    pointer-events: none;
    transition: 0.25s ease;
    z-index: 9999;
  }

  .catalog-list.active {
    opacity: 1;
    transform: translate(-50%, 0) scale(1);
    pointer-events: auto;
  }

  .catalog-list-left {
    width: 35%;
    height: 100%;
    overflow-y: auto;
  }

  .catalog-list-center {
    width: 32%;
    height: 100%;
    position: relative;
  }

  .catalog-list-right {
    width: 33%;
    height: 100%;
    position: relative;
  }

  .catalog-item-center,
  .catalog-item-right {
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
  }

  .catalog-item-center.active,
  .catalog-item-right.active {
    opacity: 1;
    pointer-events: auto;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .right {
    position: fixed;
    top: 55px;
    right: 10px;
    width: 58px;
    max-height: 250px;
    background-color: var(--nav1);
    border: 2px solid var(--border1);
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 10px;
    z-index: 20;
    opacity: 0;
    transform: scale(0.95) translateY(-10px);
    pointer-events: none;
    transition: opacity 0.3s ease, transform 0.3s ease;
  }

  .right.active {
    opacity: 1;
    transform: scale(1) translateY(0);
    pointer-events: auto;
  }

  .src_input {
    width: 100%;
    max-width: 600px;
  }

  .center {
    max-width: 700px;
    width: 100%;
    overflow: hidden;
  }

  .left-panel {
    display: none;
  }

  .products-area {
    flex: 1;
    width: 100%;
    min-width: 0;
    height: 100%;
    min-height: 100vh;
  }

  .product-price {
    font-size: large;
  }

  .product-card {
    height: 25%;
    min-height: 22vh;
    max-height: 24vh;
    position: relative;
  }

  .products-list {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    justify-content: center;
    gap: 8px;
  }

  .card-btn {
    width: 3vh;
    height: 3vh;
  }

  .products-open {
    width: 90%;
    max-width: 360px;
    padding: 1vh 0 2vh 0;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(1);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5vh;
    background-color: var(--itemBox);
    border-radius: 8px;
    z-index: 1001;
  }

  .img-container {
    width: 90%;
    height: 60%;
    position: absolute;
    top: 4vh;
    left: 50%;
    transform: translateX(-50%);
    aspect-ratio: 1 / 1;
    border: var(--border1) 1.5px solid;
    border-radius: 8px;
    overflow: hidden;
  }

  .img-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 8px;
  }

  .name-price-container {
    width: 100%;
    height: 20%;
    text-align: center;
    position: absolute;
    font-size: large;
    text-align: center;
    padding-left: 0; 
    top: 40vh;
    left: 50%;
    transform: translateX(-50%);
    aspect-ratio: 1 / 1;
    border: none;
    border-radius: 8px;
    overflow: hidden;
    z-index: 10000;
  }

  .fav-basket-container {
    position: absolute;
    height: 4vh;
    bottom: 6vh;
    left: 50%;
    transform: translateX(-50%);
    width: 85%;
    display: flex;
    justify-content: space-around;
    margin: 0 auto 2vh auto;
  }

  .fav-basket-container button {
    width: 2vh;
    height: 2vh;
    min-width: 50px;
    min-height: 50px;
    max-width: 70px;
    max-height: 70px;
    background-color: transparent;
    border: none;
    cursor: pointer;
  }

  .fav-basket-container button img {
    width: 100%;
    height: 100%;
    object-fit: contain;
  }

  .cancel-product {
    width: 6vw;
    height: 6vw;
    font-size: 5vw;
    top: 2vw;
    right: 3vw;
    position: absolute;
    cursor: pointer;
  }

  .nav {
    width: 100%;
    overflow-x: auto;
    white-space: nowrap;
  }

.center {
    display: flex;
    flex-direction: row;
    gap: 8px;
    width: 100%;
  }

  .before-src-input {
    display: none;
  }

  .src_input {
    flex: 1 1 auto;
    min-width: 0;
    height: 34px;
    background-color: var(--nav1);
    color: var(--text1);
    border: none;
    border-bottom: 2px solid var(--border1);
  }

  .src_but {
    display: none;
  }

  #suggestions {
    width: 90%;
    left: 50%;
    top: 45px;
    transform: translateX(-50%);
    position: fixed;
    z-index: 9999;
  }

  .suggestion-item {
    padding: 8px;
  }

  .suggestion-item img {
    width: 38px;
    height: 38px;
  }

  .favorite-list-hover {
    position: fixed;
    left: 25%;
    transform: translateX(-50%);
  }

  .basket-list-hover {
    position: fixed;
    left: 25%;
    transform: translateX(-50%);
  }
}

@media (max-width: 900px) {
  .nav {
    overflow-x: auto;
    white-space: nowrap;
  }
    .nav > * {
    display: inline-block;
  }
}

@media (max-width: 500px) {
  .products-list {
    grid-template-columns: repeat(2, 1fr);
  }
}