style.css

@import url("https://fonts.googleapis.com/css?family=Open+Sans:400,700|Raleway:400,700&display=swap");

* {
  box-sizing: border-box;
}
body {
  margin: 0;
  font-family: "Open Sans", sans-serif;
  color: white;
  text-align: center;
  overflow-x: hidden;
}

h1,
h2,
h3,
h4 {
  font-family: "Raleway", sans-serif;
}

a {
  text-decoration: none;
}

ul {
  list-style-type: none;
}

header {
  background-color: hsl(217, 28%, 15%);
  padding-bottom: 100px;
}

a {
  color: w;
}

p {
  line-height: 1.7;
}

ul {
  padding: 0;
}

section {
  background-color: hsl(218, 28%, 13%);
}

img {
  max-width: 100%;
}

.container {
  width: 1300px;
  max-width: 100%;
  margin: 0 auto;
  padding: 50px 50px;
}

.container-small {
  width: 700px;
  max-width: 100%;
  margin: 0 auto;
  z-index: 5;
  position: relative;
  background-color: transparent;
}

.container-middle {
  width: 900px;
  max-width: 100%;
  margin: 0px auto;
  position: relative;
  padding: 10px 0;
  z-index: 5;
}

.flex {
  display: flex;
  align-items: center;
}

.flex > div {
  flex: 1;
}

nav img {
  width: 150px;
}

nav .flex {
  justify-content: space-between;
}

nav .flex ul li:not(:last-child) {
  margin-right: 40px;
}

.btn {
  width: 200px;
  height: 40px;
  border: none;
  background: linear-gradient(120deg, hsl(176, 68%, 64%), hsl(198, 60%, 50%));
  border-radius: 20px;
  padding: 5px 15px;
  font-family: "Raleway", sans-serif;
  font-weight: 700;
  font-size: 13px;
  z-index: 5;
  color: white;
  cursor: pointer;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, 2fr);
  grid-row-gap: 70px;
  column-gap: 90px;
}

.grid p {
  font-size: 0.8em;
}

.grid div {
  padding: 20px;
}

.grid h3 {
  font-size: 1em;
}

.grid .img-box {
  width: 100px;
  height: 90px;
  margin: auto;
}

header::after {
  content: "";
  position: absolute;
  background-color: transparent;
  bottom: 250px;
  left: -200px;
  background-image: url("./images/bg-curvy-desktop.svg");
  background-repeat: no-repeat;
  background-size: 100% 100%;
  background-position: bottom left;
  width: 1500px;
  height: 400px;
  z-index: 2;
}

.stay-productive h2 {
  font-size: 2em;
}

.stay-productive p {
  font-size: 0.8em;
}

.stay-productive .flex div:first-child img {
  width: 80%;
}

.stay-productive .flex div:nth-child(2) {
  flex: 0.8;
}

.stay-productive a {
  color: hsl(176, 68%, 64%);
  padding-bottom: 4px;
  border-bottom: 1px solid hsl(176, 68%, 64%);
}

.stay-productive a img {
  margin-bottom: -3px;
}

.text-left {
  text-align: left;
}

.testimonial {
  background-color: hsl(219, 30%, 18%);
  padding: 25px;
  padding-bottom: 30px;
  text-align: left;
  font-size: 0.8em;
  border-radius: 3px;
}

.testimonial p {
  margin-bottom: 25px;
}

.testimonial img {
  width: 30px;
  height: 30px;
  margin-right: 15px;
  border-radius: 50%;
}

.user-info {
  display: flex;
}

.user-info h4 {
  margin: 0;
  font-size: 0.8em;
}

.user-info small {
  font-size: 0.5em;
}

.testimonial:nth-child(2) {
  margin-left: 30px;
  margin-right: 30px;
}

.testimonial:nth-child(1) {
  z-index: 5;
}

.quote {
  position: relative;
}

.quote::before {
  content: "";
  background-image: url(./images/bg-quotes.png);
  position: absolute;
  top: -27px;
  left: -7px;
  background-size: 80% 70%;
  width: 50px;
  height: 50px;
  background-repeat: no-repeat;
}

.email-input {
  background-color: hsl(217, 28%, 15%);
  padding: 30px 60px 30px;
  border-radius: 10px;
  transform: translateY(100px);
}

.email-input h2 {
  margin-top: 0;
}

.email-input p {
  font-size: 0.8em;
}

.email-input input {
  margin-top: 20px;
  width: 350px;
  height: 40px;
  margin-right: 20px;
  border-radius: 20px;
  border: none;
  padding: 10px 20px;
}

.email-input input:focus {
  outline: none;
}

footer {
  font-size: 0.8em;
  text-align: left;
  padding-top: 150px;
  padding-bottom: 10px;
  background-color: hsl(216, 53%, 9%);
}

footer p {
  margin: 0;
}

footer ul li {
  margin-bottom: 20px;
}

footer ul {
  margin: 0;
}

footer .logo {
  width: 150px;
  margin-bottom: 20px;
}

footer img {
  width: 15px;
  margin-right: 20px;
}

footer .flex {
  align-items: flex-start;
  justify-content: space-between;
}

footer .flex ul {
  flex: 1;
}

footer .flex div:first-child {
  flex: 2;
}

footer .flex li {
  margin-right: 15px;
}

.margin-right {
  margin-right: 50px;
}

.social-links {
  display: flex;
}

.social-links a {
  border: 1px solid white;
  color: white;
  border-radius: 50%;
  width: 28px;
  height: 28px;
  display: inline-flex;
  justify-content: center;
  align-items: center;
}

@media screen and (max-width: 768px) {
  body {
    overflow-x: hidden;
  }

  .container,
  .container-small,
  .container-middle {
    padding: 30px 40px;
  }

  h2 {
    font-size: 1.1em !important;
  }

  header {
    padding-bottom: 20px;
  }

  nav ul li {
    font-size: 0.9em;
  }

  nav .flex ul li:not(:last-child) {
    margin-right: 20px;
  }

  .logo {
    width: 100px;
  }

  .flex {
    flex-direction: column;
  }

  nav .flex {
    flex-direction: row;
  }

  .grid {
    grid-template-columns: repeat(1, 1fr);
    grid-row-gap: 10px;
  }

  header::after {
    display: none;
  }

  .stay-productive a {
    font-size: 0.7em;
  }

  .stay-productive .flex div:first-child img {
    width: 400px;
  }

  .stay-productive a img {
    width: 15px;
  }

  .testimonial:nth-child(2) {
    margin-left: 0;
    margin-right: 0;
  }

  .testimonial {
    margin-bottom: 30px;
  }

  .quote {
    margin-top: 60px;
  }

  .email-input {
    width: 85%;
  }

  .email-input form {
    display: flex;
    flex-direction: column;
  }

  .email-input form input {
    margin-bottom: 20px;
  }

  .email-input form input,
  .email-input form button {
    width: 90%;
    margin-left: 20px;
  }

  footer {
    font-size: 1em;
  }

  footer .logo {
    width: 180px;
    margin-bottom: 30px;
  }

  footer .flex > * {
    margin-bottom: 40px;
  }

  footer .social-links {
    margin: auto;
  }

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