/* .......... general styles .......... */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body,
form,
input {
  font-family: "Nunito Sans", sans-serif;
}
a {
  text-decoration: none;
}
ul li {
  list-style: none;
}
ul li a,
.header a {
  color: white;
  font-weight: 700;
  transition: 0.3s;
}
ul li a:hover,
.header a:hover {
  color: var(--main-color);
}
.container {
  width: 87%;
  max-width: 1350px;
  margin: 0 auto;
}
.btn {
  padding: var(--space-small) var(--space-large);
  color: white;
  border-radius: 5px;
  cursor: pointer;
  transition: 0.3s;
  font-weight: 700;
  background-color: var(--main-color);
  border: 2px solid var(--main-color);
  font-size: 1rem;
  display: inline-block;
}
.btn:hover {
  background-color: transparent;
  border: 2px solid var(--main-color);
  color: var(--main-color);
}
img {
  width: 100%;
  display: block;
}
:root {
  --space-small: 10px;
  --space-medium: 20px;
  --space-large: 30px;
  --space-v-large: 50px;
  --main-color: #77c601;
  --secondary-color-dark: rgba(30, 40, 50, 0.96);
  --border-color: #c2c2c2;
}

/* .......... loader of site .......... */
.loader {
  background-color: white;
  width: 100%;
  height: 100vh;
  position: fixed;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 100;
}
.loader div {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  border: 2px solid var(--main-color);
  position: relative;
  animation: loader-animation1 0.5s infinite linear;
}
.loader div::before {
  content: "";
  width: 50%;
  height: 50%;
  border-radius: 50%;
  border: 2px solid var(--main-color);
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: loader-animation2 2s infinite linear;
}
.loader div::after {
  content: "";
  width: 165%;
  height: 165%;
  border-radius: 50%;
  border: 2px solid var(--main-color);
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: loader-animation2 1s infinite linear;
}
@keyframes loader-animation1 {
  0% {
    width: 50px;
    height: 50px;
    border: 2px solid var(--main-color);
  }
  50% {
    width: 100px;
    height: 100px;
    border: 2px solid gray;
  }
  100% {
    width: 150px;
    height: 150px;
    border: 2px solid var(--main-color);
  }
}
@keyframes loader-animation2 {
  0%,
  100% {
    border: 2px solid white;
  }
  50% {
    border: 2px solid var(--main-color);
  }
}

/* .......... header .......... */
.header {
  width: 100%;
}
.header-with-img {
  width: 100%;
  height: 91vh;
  max-height: 60vw;
  background: linear-gradient(
      to left,
      rgba(42, 50, 60, 0.7),
      rgba(42, 50, 60, 0.7)
    ),
    url("../img/header.jpg") no-repeat center center;
  background-size: cover;
  padding: 135px 0 var(--space-large);
}
.main-nav {
  width: 100%;
  height: 95px;
  border-bottom: 1px solid #5f5e5e;
  color: white;
  transition: 0.3s;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 98;
}
.main-nav .container {
  height: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
}
.main-logo {
  display: flex;
  align-items: center;
  height: 100%;
}
.main-logo:hover span {
  color: var(--main-color);
}
.main-logo span {
  color: white;
  font-size: 34px;
  transition: color 0.4s;
  transform: translate(-10px, 8px);
}
/* toggle menu */
.toggle-menu-open,
.toggle-menu-close {
  display: none;
  font-size: 20px;
  cursor: pointer;
  transition: 0.3s;
  padding: 3px;
}
.toggle-menu-open {
  margin-left: 7px;
}
.toggle-menu-open:hover,
.toggle-menu-close:hover {
  color: var(--main-color);
}
.mobile-main-menu {
  display: none;
}
/* main-menu & main-form */
.main-menu {
  display: flex;
  height: 100%;
}
.main-menu > li {
  height: 100%;
  margin-left: 25px;
  transition: 0.3s;
}
li.needs-relative {
  position: relative;
}
.main-menu > li > a {
  height: 100%;
  padding: 0 20px;
  display: flex;
  align-items: center;
}
.main-menu > li > a > i {
  margin-left: 7px;
}
.main-menu > li > ul {
  position: absolute;
  top: 100%;
  left: 0;
  padding: 10px 5px;
  background-color: var(--secondary-color-dark);
  white-space: nowrap;
  visibility: hidden;
  opacity: 0;
  transition: 0.2s;
  border-top: 1px solid #5f5e5e;
  border-bottom-left-radius: 7px;
  border-bottom-right-radius: 7px;
  transform: translateY(10px);
}
.main-menu > li:not(:last-child) > ul > li:not(:last-child) {
  margin-bottom: 10px;
}
.main-menu > li:hover > ul {
  visibility: visible;
  opacity: 1;
  transform: translateY(0);
}
.main-menu > li > ul > li > a,
.mega-menu > li > ul > li > a {
  display: block;
  padding: 5px 30px;
}
.main-menu > li .mega-menu {
  width: 100%;
  display: flex;
  justify-content: space-evenly;
  padding: 35px 5px;
}
.main-menu > li .mega-menu > li:not(:first-child) {
  border-left: 1px solid white;
}
.main-menu > li .mega-menu > li > ul {
  margin-top: 10px;
}
.main-menu > li .mega-menu > li > ul > li:not(:last-child) {
  margin-bottom: 5px;
}
.main-form {
  height: 100%;
  display: flex;
}
.main-form a {
  height: 100%;
  margin-left: 25px;
  padding: 0 20px;
  display: flex;
  align-items: center;
}
.main-form a i {
  margin-right: 7px;
}
/* modal sing-up & log-in form */
.modal {
  width: 100%;
  height: 100%;
  position: fixed;
  left: 0;
  top: 0;
  z-index: 99;
  padding: var(--space-v-large);
  background-color: var(--secondary-color-dark);
  display: none;
}
.modal > i {
  font-size: 44px;
  color: red;
  top: 3%;
  right: 7%;
  position: absolute;
  transform: rotate(0);
  transition: 0.3s;
}
.modal > i:hover {
  transform: rotate(180deg);
}
.modal-content {
  color: gray;
  width: 50%;
  max-width: 800px;
  height: 100%;
  max-height: 620px;
  margin: 0 auto;
  overflow: auto;
  background-color: white;
  border-radius: 5px;
  animation: modal-animate 0.3s;
  position: relative;
}
@keyframes modal-animate {
  from {
    transform: translateY(-300px);
  }
  to {
    transform: translateY(0);
  }
}
.modal-content ul {
  display: flex;
  width: 100%;
  border-bottom: 0.7px solid #eef5fd;
}
.modal-content ul li {
  width: 50%;
  text-align: center;
  padding: var(--space-small);
  color: var(--secondary-color-dark);
}
#modal-sign-up .modal-content ul li:last-child,
#modal-log-in .modal-content ul li:first-child {
  background-color: var(--main-color);
  cursor: pointer;
  color: white;
  transition: 0.3s;
  border-left: 0.7px solid #eef5fd;
}
#modal-log-in .modal-content ul li:first-child {
  border-left: none;
  border-right: 0.7px solid #eef5fd;
}
#modal-sign-up .modal-content ul li:last-child:hover,
#modal-log-in .modal-content ul li:first-child:hover {
  background-color: white;
  color: var(--main-color);
}
.modal-content form {
  padding: var(--space-large);
  width: 100%;
}
.modal-content form h2 {
  font-size: 42px;
  color: var(--secondary-color-dark);
  font-weight: 900;
  text-align: center;
  margin-bottom: var(--space-medium);
}
.modal-content form input:not(:last-of-type) {
  width: 100%;
  padding: var(--space-small) var(--space-medium);
  margin-bottom: var(--space-small);
  border: 0.7px solid #c2c2c2;
  border-radius: 5px;
  font-size: 1rem;
}
.modal-content form label {
  display: inline-block;
  margin: var(--space-small) 0 var(--space-medium) var(--space-small);
  cursor: pointer;
}
#i-agree,
#keep-log-in {
  width: auto;
  transform: scale(1.3);
  cursor: pointer;
}
.modal-content form input[type="submit"] {
  width: 100%;
}
.modal-content form input[type="submit"]:hover {
  background-color: transparent;
  color: var(--main-color);
  border: 2px solid var(--main-color);
}
.modal-content span {
  display: inline-block;
  margin-top: var(--space-medium);
}
.modal-content span:last-of-type {
  text-decoration: underline;
  cursor: pointer;
  margin-left: var(--space-small);
}
/* .main-nav-fix */
/* will be added to the .main-nav by script */
.main-nav-fix {
  background-color: var(--secondary-color-dark);
  border-bottom: none;
  height: 65px;
}
/* empower & categories */
.header-with-img > .container {
  display: flex;
  justify-content: space-between;
  color: white;
}
.empower {
  width: 49%;
  padding-top: var(--space-large);
}
.empower h1 {
  font-size: 44px;
  font-weight: 900;
  margin: var(--space-large) 0;
  line-height: 44px;
}
.search-box {
  margin-top: var(--space-large);
  display: flex;
  position: relative;
}
.search-box i {
  font-size: 18px;
  position: absolute;
  top: 50%;
  left: 15px;
  transform: translateY(-50%);
}
.search-box input {
  flex-grow: 1;
  margin-right: var(--space-small);
  background-color: transparent;
  border: 2px solid white;
  outline: none;
  border-radius: 5px;
  padding: 0 5px 0 40px;
}
.categories {
  width: 49%;
  display: flex;
  flex-direction: column;
  flex-wrap: wrap;
  max-height: 400px;
  align-content: flex-end;
}
.categories div {
  width: 115px;
  height: 115px;
  border: 2px solid var(--border-color);
  border-radius: 5px;
  margin: 5px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  transition: 0.3s;
}
.categories div:hover {
  background-color: white;
  color: black;
}
.categories div:nth-child(1) {
  animation: categories-animate 0.5s linear;
}
.categories div:nth-child(2) {
  animation: categories-animate 0.8s linear;
}
.categories div:nth-child(3) {
  animation: categories-animate 1.1s linear;
}
.categories div:nth-child(4) {
  animation: categories-animate 1.4s linear;
}
.categories div:nth-child(5) {
  animation: categories-animate 1.7s linear;
}
.categories div:nth-child(6) {
  animation: categories-animate 2s linear;
}
.categories div:nth-child(7) {
  animation: categories-animate 2.3s linear;
}
.categories div:nth-child(8) {
  animation: categories-animate 2.6s linear;
}
.categories div:nth-child(9) {
  animation: categories-animate 2.9s linear;
}
.categories div i {
  color: var(--main-color);
  font-size: 36px;
  margin-bottom: 4px;
}
@keyframes categories-animate {
  0% {
    transform: translateX(-100%);
    opacity: 0;
  }
  60% {
    opacity: 0;
  }
  100% {
    transform: translateX(0);
    opacity: 1;
  }
}
/* the second part of header */
.header-with-main-color {
  width: 100%;
  background-color: var(--main-color);
  color: white;
  padding: var(--space-v-large) 0;
}
.header-with-main-color .container {
  display: flex;
  justify-content: space-between;
}
.header-last-content {
  display: flex;
  align-items: center;
}
.header-last-content i {
  font-size: 44px;
  margin-right: var(--space-medium);
}

/* .......... main .......... */
/* popular courses */
.popular-courses {
  padding: var(--space-v-large) 0;
  text-align: center;
}
.popular-courses > h2 {
  font-size: 44px;
  font-weight: 900;
  color: var(--secondary-color-dark);
  margin: var(--space-medium) 0;
}
.filter-btns {
  margin-bottom: var(--space-medium);
}
.filter-btns span {
  padding: 2px 10px 4px;
  display: inline-block;
  cursor: pointer;
  position: relative;
}
.filter-btns span:not(:last-child) {
  margin-right: var(--space-medium);
}
.filter-btns span::after {
  content: "";
  width: 100%;
  height: 2px;
  background-color: var(--main-color);
  position: absolute;
  left: 0;
  bottom: 0;
  transform: scaleX(0);
  transition: 0.3s;
}
.filter-btns span:hover::after {
  transform: scaleX(1);
}
.filter-btns span.selected {
  font-weight: 700;
}
.filter-btns span.selected::after {
  transform: scaleX(1);
}
.courses-content {
  display: flex;
  flex-wrap: wrap;
  margin: 0 -15px;
}
.flip-card {
  width: 33.333%;
  padding: 0 15px;
  margin-bottom: var(--space-medium);
}
.flip-card > div {
  text-align: left;
  width: 100%;
  height: 450px;
  perspective: 1800px;
  position: relative;
  border-radius: 5px;
}
.flip-card > div:hover .flip-card-front {
  transform: rotateY(180deg);
}
.flip-card > div:hover .flip-card-back {
  transform: rotateY(0);
}
.flip-card h2 {
  font-size: 21px;
}
.stars {
  color: var(--main-color);
  margin: var(--space-medium) 0;
}
.flip-card span {
  display: inline-block;
  border: 1px solid var(--main-color);
  padding: 2px 8px;
  border-radius: 5px;
  margin-top: 6px;
  transition: 0.3s;
}
.flip-card span:hover {
  background-color: var(--main-color);
}
.flip-card-front,
.flip-card-back {
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  position: absolute;
  top: 0;
  left: 0;
  transition: 0.6s;
  border-radius: 5px;
}
.flip-card-front {
  border: 1px solid var(--border-color);
}
.flip-card-front > div {
  margin: -1px;
}
.flip-card-front > div img {
  border-top-left-radius: 5px;
  border-top-right-radius: 5px;
  max-height: 250px;
}
.flip-card-front-content {
  padding: var(--space-medium);
}
.flip-card-back {
  background-color: var(--secondary-color-dark);
  color: white;
  padding: var(--space-medium);
  transform: rotateY(-180deg);
}
.flip-card-back > p {
  margin-top: var(--space-medium);
  font-size: 18px;
}
.flip-card-back > a {
  display: block;
  width: 130px;
  padding: var(--space-small) 0;
  text-align: center;
  margin: var(--space-small) 0 var(--space-v-large);
}
/* personable */
.personable {
  width: 100%;
  background: linear-gradient(
      to left,
      rgba(42, 50, 60, 0.7),
      rgba(42, 50, 60, 0.7)
    ),
    url("../img/call-to-action.jpg") no-repeat center center;
  background-size: cover;
  padding: 85px 0;
  color: white;
  background-attachment: fixed;
}
.personable h2 {
  font-size: 44px;
  font-weight: 900;
  margin: var(--space-small) 0 var(--space-large);
}
.personable p {
  width: 50%;
  margin-bottom: var(--space-v-large);
}
/* popular categories */
.popular-categories {
  text-align: center;
  padding: var(--space-v-large) 0;
  color: var(--secondary-color-dark);
}
.popular-categories h2 {
  font-size: 44px;
  font-weight: 900;
  margin: var(--space-small) 0 var(--space-large);
}
.categories-content {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
}
.categories-content > section {
  width: 32%;
  border: 1px solid transparent;
  margin-bottom: var(--space-medium);
  cursor: pointer;
  border-radius: 5px;
  padding: var(--space-medium);
  transition: 0.3s;
}
.categories-content > section:hover {
  border: 1px solid var(--border-color);
}
.categories-content i {
  color: var(--main-color);
  font-size: 65px;
}
.categories-content h4 {
  font-size: 21px;
  font-weight: 800;
  margin: var(--space-medium) 0;
}
.categories-content p {
  color: gray;
}
/* slider */
.slider {
  background-color: #eef5fd;
  padding: 65px 0;
  text-align: center;
}
.img-frame {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  margin: 0 auto;
}
.img-frame img {
  width: 100px;
  height: 100px;
  border-radius: 50%;
}
.slider p {
  color: gray;
  width: 80%;
  margin: var(--space-large) auto;
  font-size: 17px;
}
.slider .item > img {
  width: 37px;
  height: 31px;
  display: block;
  margin: 0 auto var(--space-large);
}
.slider h3 {
  font-weight: 900;
  font-size: 21px;
  color: var(--secondary-color-dark);
}
.slider span {
  display: inline-block;
  margin-bottom: var(--space-large);
  color: gray;
}
/* video */
.video {
  display: flex;
}
.video-left {
  width: 55%;
  position: relative;
  cursor: pointer;
}
.video-left i {
  color: white;
  font-size: 70px;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  transition: 0.3s;
}
.video-left:hover i {
  color: var(--main-color);
}
.video-right {
  background-color: rgba(44, 54, 62, 0.8);
  width: 45%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  padding: 0 var(--space-large);
  color: white;
}
.video-right h2 {
  font-size: 42px;
  font-weight: 900;
  margin: var(--space-small) 0 var(--space-large);
}
.video-right a {
  margin-top: var(--space-large);
}
/* logos */
.logos {
  display: flex;
  flex-wrap: wrap;
  padding: var(--space-v-large) 0;
  justify-content: space-between;
}
.logos div {
  width: 13%;
  padding: 5px var(--space-small);
  border: 1px solid transparent;
  cursor: pointer;
  border-radius: 5px;
  margin-bottom: var(--space-small);
}
.logos div:hover {
  border: 1px solid var(--main-color);
}

/* .......... footer .......... */
.footer-content {
  background-color: var(--secondary-color-dark);
  padding: var(--space-v-large) 0;
}
.footer-content .container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  color: white;
}
.footer-content .container > * {
  width: 22%;
}
.footer-content h2 {
  margin-bottom: var(--space-small);
}
.footer-content i {
  margin-right: 5px;
}
.footer-content li {
  margin-bottom: 6px;
}
.footer-logo .main-logo {
  height: auto;
  margin-bottom: var(--space-large);
  font-weight: 700;
  width: 110px;
}
.footer-logo .main-logo img {
  display: inline-block;
  width: auto;
}
.footer-logo p {
  padding-right: var(--space-large);
}
.follow-us li {
  cursor: pointer;
  transition: 0.3s;
}
.follow-us li:hover {
  color: var(--main-color);
}
.tags span {
  display: inline-block;
  border: 1px solid var(--main-color);
  padding: 2px 8px;
  margin-bottom: 6px;
  border-radius: 5px;
  cursor: pointer;
  transition: 0.3s;
}
.tags span:hover {
  background-color: var(--main-color);
}
.copy-right {
  background-color: rgba(44, 54, 62, 0.8);
  padding: var(--space-medium) 0;
  text-align: center;
  color: white;
}

/* .......... elevator .......... */
.elevator {
  width: 50px;
  height: 50px;
  background-color: var(--main-color);
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  position: fixed;
  right: 8px;
  bottom: 8px;
  box-shadow: 0 0 2px 1px gray;
  font-size: 20px;
  transition: 0.3s;
  cursor: pointer;
  display: none;
}
.elevator:hover {
  transform: translateY(-5px);
}

/* .......... responsive .......... */
body {
  max-width: 2000px;
  margin: 0 auto;
}
@media (min-width: 1450px) {
  .header-with-img {
    height: 75vh;
  }
}
@media (max-width: 1000px) {
  .container {
    width: 94%;
  }
  .header-with-img {
    padding: 110px 0 var(--space-small);
  }
  .main-nav {
    height: 80px;
  }
  .main-nav-fix {
    height: 50px;
  }
  .modal-content {
    width: 80%;
  }
  .main-menu > li {
    margin-left: 10px;
  }
  .main-menu > li > a {
    padding: 0 8px;
  }
  .main-menu > li > ul > li > a,
  .mega-menu > li > ul > li > a {
    padding: 5px 15px;
  }
  .main-form a {
    margin-left: 10px;
    padding: 0 8px;
  }
  .main-logo {
    transform: scale(0.8);
  }
  .empower {
    padding-top: 0;
  }
  .empower h1 {
    font-size: 34px;
    font-weight: 800;
    margin: var(--space-medium) 0;
    line-height: 34px;
  }
  .search-box .btn {
    padding: var(--space-small);
  }
  .categories {
    max-height: 280px;
  }
  .categories div {
    width: 100px;
    height: 85px;
    border-radius: 3px;
    margin: 3px;
  }
  .categories div i {
    font-size: 30px;
  }
  .header-with-main-color {
    padding: var(--space-large) 0;
  }
  .header-last-content i {
    font-size: 34px;
    margin-right: var(--space-small);
  }
  .flip-card {
    width: 50%;
  }
  .personable p {
    width: 65%;
  }
  .slider {
    padding: var(--space-medium) 0;
  }
  .slider p {
    width: 100%;
  }
  .video-left i {
    font-size: 45px;
  }
  .video-right {
    padding: 0 var(--space-small);
  }
  .video-right h3 {
    font-size: 16px;
  }
  .video-right h2 {
    font-size: 22px;
    font-weight: 800;
    margin: var(--space-small) 0 var(--space-medium);
  }
  .video-right a {
    margin-top: var(--space-medium);
  }
  .logos div {
    width: 25.1%;
  }
  .footer-content {
    padding: var(--space-medium) 0;
  }
  .footer-content .container > * {
    width: 24%;
  }
  .footer-logo .main-logo {
    margin-bottom: var(--space-medium);
  }
  .footer-logo p {
    padding-right: 0;
  }
  .tags span {
    padding: 2px 4px;
  }
}
@media (max-width: 767px) {
  .header-with-img {
    padding: 100px 0 var(--space-small);
  }
  /* toggle menu */
  .main-menu {
    display: none;
  }
  .toggle-menu-open,
  .toggle-menu-close {
    display: inline-block;
  }
  .toggle-menu-close {
    font-size: 30px;
    position: absolute;
    top: 4px;
    right: 4px;
    background-color: black;
    padding: 10px;
    border-radius: 5px;
  }
  .mobile-main-menu {
    display: block;
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0;
    left: -100%;
    background-color: var(--secondary-color-dark);
    overflow: auto;
    padding: 10px 5px 5px;
    transition: 0.3s;
  }
  .mobile-main-menu a {
    display: inline-block;
    width: 100%;
    border-radius: 5px;
    padding: 2px 10px;
    transition: 0.3s;
    margin-bottom: 3px;
  }
  .mobile-main-menu a:hover {
    background-color: black;
  }
  .mobile-main-menu > li > a {
    width: auto;
    min-width: 135px;
    background-color: black;
    font-size: 22px;
    font-weight: 800;
    padding: 2px 6px;
  }
  .mobile-main-menu > li > ul > li > a {
    font-size: 18px;
    padding-left: 50px;
  }
  .mobile-main-menu > li > ul > li > ul > li > a {
    font-weight: 400;
    padding-left: 100px;
  }
  /* modal sing-up & log-in form */
  .modal-content {
    width: 88%;
  }
  .modal > i {
    font-size: 32px;
    left: auto;
    right: 30px;
    top: 10px;
  }
  .modal-content form {
    padding: var(--space-small);
  }
  .modal-content form h2 {
    font-size: 32px;
    font-weight: 800;
  }
  /* ... */
  .categories {
    display: none;
  }
  .empower {
    width: 100%;
    text-align: center;
  }
  .search-box {
    margin-top: var(--space-medium);
  }
  .search-box .btn {
    padding: var(--space-small) var(--space-large);
  }
  .header-with-main-color {
    display: none;
  }
  .personable {
    text-align: center;
  }
  .personable p {
    width: 100%;
  }
  .categories-content > section {
    width: 48%;
  }
  .video {
    display: none;
  }
  .footer-content .container > * {
    width: 47%;
    margin-bottom: var(--space-medium);
  }
}
@media (max-width: 620px) {
  .header-with-img {
    padding: 90px 0 var(--space-small);
  }
  .empower h3 {
    font-size: 16px;
  }
  .empower h1 {
    font-size: 24px;
    margin: var(--space-small) 0;
    line-height: 20px;
  }
  .search-box {
    margin-top: var(--space-small);
  }
  .search-box .btn {
    padding: var(--space-small);
    font-size: 15px;
  }
  .filter-btns span {
    padding: 2px 5px 4px;
  }
  .filter-btns span:not(:last-child) {
    margin-right: var(--space-small);
  }
  .personable {
    padding: var(--space-v-large) 0;
  }
  .personable h2 {
    font-size: 32px;
    font-weight: 800;
  }
  .popular-categories h2 {
    font-size: 32px;
    font-weight: 800;
  }
  .slider {
    padding: var(--space-small) 0;
  }
  .slider p {
    margin: var(--space-medium) auto;
    font-size: 16px;
  }
  .slider .item > img {
    margin: 0 auto var(--space-small);
    transform: scale(0.5);
  }
  .slider h3 {
    font-size: 18px;
    font-weight: 700;
  }
  .slider span {
    margin-bottom: var(--space-small);
  }
  .elevator {
    width: 35px;
    height: 35px;
    right: 5px;
    bottom: 5px;
    font-size: 18px;
  }
}
@media (max-width: 540px) {
  .header-with-img {
    max-height: 65vw;
  }
  .modal {
    padding: var(--space-medium);
  }
  .modal-content {
    width: 90%;
  }
  .modal > i {
    top: 3px;
    right: 3px;
  }
  .search-box i {
    font-size: 16px;
    left: 10px;
  }
  .search-box input {
    margin-right: 5px;
    padding: 0 3px 0 30px;
  }
  .filter-btns {
    display: none;
  }
  .flip-card {
    width: 100%;
  }
  .categories-content > section {
    width: 100%;
  }
  .logos {
    justify-content: space-evenly;
    padding: var(--space-small) 0;
  }
  .logos div {
    width: 39%;
  }
  .footer-content .container > * {
    width: 100%;
    margin-left: var(--space-medium);
  }
  .copy-right {
    padding: var(--space-small) 0;
  }
}
@media (max-width: 420px) {
  .header-with-img {
    max-height: 75vw;
  }
  .popular-courses > h2 {
    font-size: 30px;
    font-weight: 700;
  }
}
@media (max-width: 370px) {
  .header-with-img {
    max-height: 94vw;
  }
  .modal {
    padding: var(--space-small);
  }
  .modal > i {
    font-size: 26px;
  }
  .modal-content form {
    padding: var(--space-small) 5px;
  }
  .modal-content form label {
    margin: var(--space-small) 0 var(--space-medium) 2px;
    font-size: 14px;
  }
  .modal-content form span {
    font-size: 14px;
  }
  .main-logo {
    transform: scale(0.7);
  }
  .main-form a {
    font-size: 14px;
    margin-left: 5px;
    padding: 0 2px;
  }
  .main-form a i {
    margin-right: 3px;
  }
  .search-box {
    display: block;
    position: relative;
  }
  .search-box i {
    top: 6px;
    left: 7px;
    transform: translateY(0);
  }
  .search-box input {
    width: 100%;
    height: 27px;
    margin: 0 0 5px;
  }
  .search-box .btn {
    width: 100%;
    padding: 3px 0;
  }
}