header {
  width: 100%;
  height: 100vh;
  background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.7)),
    url(/media/cover.png);
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  position: relative;
  overflow-x: hidden;
}
header .nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px;
}
header ul {
  display: flex;
}
header li {
  margin: 0 20px;
}
header a {
  color: var(--light);
  font-size: 1.2rem;
  transition: border 0.1s;
}
header a:hover {
  border-bottom: 2px solid var(--light);
}
header .logo {
  cursor: pointer;
  background-color: var(--light);
  border-radius: 10px;
}
header .logo img {
  width: 70px;
}
header .burger {
  display: none;
  cursor: pointer;
}
header .burger > div {
  height: 3px;
  width: 20px;
  background: var(--light);
  margin: 3px 0;
  cursor: pointer;
}
header .hero {
  display: flex;
  height: 80vh;
  justify-content: center;
  align-items: center;
  text-align: center;
}

header .hero h1 {
  font-size: 64px;
  color: var(--light);
}
header .hero p {
  font-size: 22px;
  width: 70%;
  margin: auto;
  color: var(--medium);
  margin-bottom: 20px;
}

header .hero a {
  color: silver;
}

header .hero a:hover {
  border: 2px solid silver;
}

/* Section-A */
.section-a {
  width: 100%;
  height: 100vh;
  background-image: linear-gradient(315deg, #121b53 0%, #191714 74%);
}

.section-a .container {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  color: var(--light);
}
.section-a h1 {
  font-size: 62px;
  margin-bottom: 30px;
  margin-top: 30px;
}
.section-a .lead {
  font-size: 20px;
  margin-bottom: 30px;
}

.section-a .row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-gap: 40px;
  text-align: center;
  margin-top: 90px;
}

.section-a .text {
  width: 500px;
  height: 90px;
  background-color: var(--dark);
  border-radius: 10px;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
}

/* Section-b */
.section-b .container{
  padding: 30px;
}
.section-b h1 {
  font-size: 62px;
  color: var(--light);
  margin: 20px 0 10px 0;
}
.section-b p {
  font-size: 20px;
  color: var(--light);
  margin-bottom: 10px;
}

.section-b .row {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  margin-top: 40px;
}
.section-b .col {
  flex-basis: 35%;
  margin: 0 10px;
}

.section-b .col1 > div {
  width: 100%;
  background-color: var(--medium);
  margin-bottom: 20px;
  color: var(--light);
  padding: 20px;
  border-radius: 10px;
  font-size: 18px;
  transition: background 0.3s;
  cursor: pointer;
}
.section-b .col1 > div:hover {
  background-color: #121b53;
}

.section-b video {
  margin: 0 0 10px 0;
}

/* Section-c */
.section-c {
  width: 100%;
  background-image: linear-gradient(315deg, #121b53 0%, #191714 74%);
  text-align: center;
}

.section-c .container {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100%;
  padding: 30px;
}

.section-c h1 {
  font-size: 62px;
  margin-bottom: 20px;
  color: var(--light);
}
.section-c p {
  font-size: 22px;
  margin-bottom: 20px;
  color: var(--light);
}

.section-c .row {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: 40px;
}

.section-c .col {
  flex-basis: 35%;
  margin: 0 10px;
  background-color: var(--dark);
  border-radius: 10px;
  height: 400px;
  overflow: hidden;
}
.section-c .col > div:first-child {
  height: 250px;
}
.section-c .col > div:last-child {
  padding: 30px;
}

.section-c .col h1 {
  font-size: 28px;
}
.section-c .col p {
  font-size: 18px;
  color: var(--medium);
}
.section-c .col .img1 {
  background-image: url(/media/img1.jpg);
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  object-fit: cover;
  transition: 0.3s;
}
.section-c .col .img2 {
  background-image: url(/media/img2.jpg);
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  object-fit: cover;
  transition: 0.3s;
}
.section-c .col .img3 {
  background-image: url(/media/img3.jpg);
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  object-fit: cover;
  transition: 0.3s;
}

/* Footer */
footer {
  height: 90px;
  width: 100%;
  background: var(--dark);
  color: var(--light);
}
footer .container {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
}
footer p {
  font-size: 20px;
}
footer a {
  color: var(--medium);
}