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

a {
  text-decoration: none;
  color: #333;
}

body {
  font-family: Segoe UI, SegoeUI, "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: #333;
  font-size: 15px;
}

.bg-yellow {
  background-color: #ffb900;
}

.bg-light {
  background-color: #fff;
}

.bg-dark {
  background-color: #000;
  color: #fff;
}

nav a {
  color: #333;
}

.container {
  width: 90%;
  margin: auto;
}

nav {
  margin: 0 10px;
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

nav img {
  width: 130px;
}

.main-menu {
  flex: 1;
}

nav ul {
  padding-top: 13px;
  display: flex;
}

li {
  list-style: none;
}

ul li a {
  padding-left: 20px;
}

.showcase {
  width: 100%;
  height: 460px;
  margin-top: 10px;
  margin-bottom: 50px;
  background: url('img/web.jpeg') no-repeat center center/cover;
}

.showcase-content {
  width: 60%;
  color: #fff;
  padding: 140px 70px;
}

.showcase a {
  font-weight: 500;
}

.btn {
  padding: 8px 15px;
  color: #000;
}

h2 {
  margin: 10px 0;
}

.showcase p {
  margin: 20px 0;
}

.ccards {
  margin: 30px 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-gap: 25px;
}

.cards img {
  width: 100%;
  margin-bottom: 30px;
}

.cards a {
  font-weight: bold;
  color: #0067b8;
  padding-left: 0;
}

.cards p {
  margin-bottom: 20px;
}

.third-section {
  width: 100%;
  height: 400px;
  background: url('img/andriod.jpg') no-repeat center center/cover;
  color: #fff;
  line-height: 3;
  padding: 110px 0 0 70px;
}

#subject {
  font-size: 1.5rem;
  font-weight: 400;
}

.section-4 {
  background-color: #f4f4f4;
  padding: 30px;
  line-height: 1.5;
  text-align: center;
}

.section-4 a {
  font-weight: bold;
}

.lg-h3 {
  font-weight: 500;
  font-size: 2rem;
  color: #000;
}

.social-media {
  margin: 50px 0;
  display: flex;
  align-items: center;
}

.social-media img {
  width: 30px;
  margin-left: 20px;
}

.footer {
  background-color: #f4f4f4;
}

.footer a {
  color: #616161;
  font-size: 11px;
}

.footer h3 {
  font-weight: 600;
  font-size: 13px;
  color: #616161;
}

.footer li {
  padding-bottom: 15px;
}

.footer li a {
  padding-left: 0;
}

.footer > div {
  display: flex;
}

.footer ul {
  padding-right: 100px;
  padding-top: 50px;
}

.hamburger {
  width: 25px;
  height: 2px;
  position: absolute;
  background-color: #000;
  top: 30px;
  right: 35px;
  display: none;
}

.hamburger::before,
.hamburger::after {
  content: '';
  background-color: inherit;
  position: absolute;
  width: 25px;
  height: 2px;
  top: -7px;
}

.hamburger::after {
  top: 7px;
}

.toggler {
  width: 25px;
  height: 25px;
  top: 20px;
  right: 35px;
  position: fixed;
  background-color: #ccc;
  cursor: pointer;
  z-index: 2;
  opacity: 0;
}

/* tablet */
@media (max-width: 768px) {
  .container {
    width: 90%;
  }

  .hamburger {
    display: block;
  }

  .main-menu {
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    background-color: #ccc;
    height: 100%;
    width: 50%;
    opacity: 0.9;
    border-right: 1px solid #ccc;
    transform: translateX(-500px);
    transition: transform 0.5s ease;
    padding: 10px;
    box-sizing: border-box;
  }

  .no-scroll {
    overflow: hidden;
  }

  .show {
    transform: translate(0);
  }

  .main-menu li {
    padding: 10px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.5);
  }

  .main-menu li:last-child {
    border: none;
  }

  .ccards {
    margin: 30px 0;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-gap: 25px;
  }

  .showcase-content {
    width: 100%;
    margin: auto;
    padding: 50px 30px;
  }

  .social-media {
    margin: 50px 0;
    display: flex;
    align-items: center;
  }

  .social-media img {
    width: 20px;
    margin-left: 15px;
  }

  .third-section {
    display: flex;
    flex-direction: column;
    padding: 50px 30px;
    height: auto;
  }

  .showcase {
    height: auto;
  }

  #subject {
    font-size: 1.1rem;
  }

  .third-section a {
    width: max-content;
    padding: 0 10px;
  }

  .footer ul {
    padding-right: 60px;
  }
}

/* mobile */
@media (max-width: 568px) {
  body {
    font-size: 13px;
  }

  .container {
    width: 95%;
  }

  .hide {
    display: none;
  }

  .right-nav {
    padding-right: 70px;
  }

  .hamburger {
    right: 15px;
  }

  .toggler {
    right: 15px;
  }

  .footer > div {
    display: block;
  }

  .lg-h3 {
    font-size: 1.5rem;
  }

  .ccards {
    display: block;
  }

  .cards {
    padding: 20px 0;
    border-bottom: #ccc solid 1px;
  }

  .showcase-content {
    width: 100%;
    margin: auto;
    padding: 50px 30px;
  }
}