body {
  background: linear-gradient(0deg, yellow 30%, #ff5a3d 100%);
  height: 100vh;
  margin: 0;
  color: rgb(7, 27, 43);
}

.content {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
  box-sizing: border-box;
  text-align: justify;
}

.menu {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.color-button {
  display: flex;
  justify-content: center;
  align-items: center;
}

.rectangle {
  margin: 7px;
  padding: 10px;
  width: 80px;
  background-color: transparent;
  text-shadow: 0 0 7px #000000;
  border: none;
  box-shadow: 0 0 5px #000000, 0 0 5px #000000 inset;
  transition: all 0.3s ease-in;
}

.diamond {
  margin: 25px 10px;
  padding: 27px 0;
  width: 80px;
  background-color: transparent;
  font-size: 22px;
  text-shadow: 0 0 7px #000000;
  border: none;
  border-radius: 0% 50% 0% 50%;
  box-shadow: 0 0 10px #000000, 0 0 10px #000000 inset;
  transition: all 0.3s ease-in;
}

@media (min-width: 767px) {
  .content {
    width: 100%;
    padding: 10px;
  }
}

@media (min-width: 992px) {
  .content {
    width: 50%;
  }
}

@media (min-width: 1200px) {
  .content {
    width: 33.33%;
  }
}

.container {
  display: flex;
  flex-wrap: wrap;
  width: 500px;
  height: 500px;
  border: 1px solid black;
  background-color: rgb(0, 0, 0);
}

.square {
  background-color: rgb(0, 0, 0);
  box-sizing: border-box;
  border: 1px solid rgba(255, 248, 248, 0.316);
}

/*Header and footer*/
header {
  background-color: rgba(0, 0, 0, 0.383);
  width: 100%;
  height: 50px;
  display: flex;
  padding: 0;
  align-items: center;
  margin: 0;
  padding: 3px;
  justify-content: space-between;
}

.navi {
  display: flex;
  justify-content: space-between;
  gap: 10px;
}

.icon {
  display: inline-block;
  margin: 0 10px;
  width: 20px;
  height: 20px;
  background-repeat: no-repeat;
  background-size: contain;
}

.linkedin-icon {
  background-image: url("https://www.linkedin.com/favicon.ico");
}

.github-icon {
  background-image: url("https://github.com/favicon.ico");
}

.gmail-icon {
  background-image: url("https://ssl.gstatic.com/ui/v1/icons/mail/rfr/logo_gmail_lockup_dark_1x_r2.png");
  background-size: cover;
}