body {
  font-family: Arial, Helvetica, sans-serif;
  margin: 0;
}

/* header style for mobile phones */
.hero {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;

  background: url(./assets/opera.jpg);
  min-height: 100vh;
  background-size: cover;
  background-position: center;
}

.logo-container {
  width: 40px;
  margin-left: 10px;
  margin-top: 3px;
}

img {
  width: 100%;
  background-color: white;
}

/* navigation with hamburger-layer for mobile phone*/
.navigation {
  margin: 10px;
}

.hamburger-layer {
  width: 20px;
  height: 5px;
  background-color: black;
  margin-bottom: 2px;
  margin-right: 10px;
  margin-top: 3px;
}

.header-text {
  padding-top: 25%;
  text-align: center;
}

/* texts of the header for mobile phones */
h1 {
  color: #FFDF00;
  font-size: 40px;
}

h2 {
  color: #FFDF00;
  margin-top: 15%;
}

/* header for Desktop */
@media (min-width: 1024px) {
  .header-text {
    padding-top: 10%;
    text-align: center;
    max-width: 600px;
  }

  h1 {
    color: #FFDF00;
    font-size: 60px;
  }

  h2 {
    color: #FFDF00;
    font-size: 40px;
    margin-top: 15%;
  }
}

/* Title of form for mobile phones */

h3 {
  color: rgb(81, 81, 132);
  font-weight: 200;
  padding-left: 5%;
}

/* Title of form for Desktop */
@media (min-width: 1024px) {
  h3 {
    font-weight: 500;
    text-align: left;
    font-size: xx-large;
  }
}

/* sign-up form for mobile phones */
.form-container {
  display: flex;
  justify-content: center;
  background-color: rgb(236, 233, 233);
  padding: 5%;
  border-radius: 5px;
  margin: auto;
  max-width: 500px;
}

form {
  display: flex;
  width: 80%;
  display: block;
  justify-content: center;
}

/* personal information */
label {
  display: block;
  text-align: left;
  padding: 5px;
}

input {
  width: 100%;
  justify-content: center;
  border: 2px solid rgb(200, 200, 200);
  border-radius: 5px;
}

/* Inputs for Tablets, iPads, desktop */
@media (min-width: 667px) {
  input {
    width: 300px;
  }
}

/* Input for Desktop */
@media (min-width:1024px) {
  input:hover {
    background-color: rgb(219, 218, 218);
  }
}

/* country: drop-down menu */
.drop-down {
  border: 2px solid rgb(200, 200, 200);
  border-radius: 5px;
}

/* terms and conditions: checkbox-style */
.terms-and-conditions {
  display: flex;
}

#checkbox {
  width: 20px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* submit-button */
#submit-button-container {
  display: flex;
  width: 80%;
  margin-left: 10%;
  margin-top: 5px;
  justify-content: center;
  background-color: rgb(166, 166, 188);
  border-radius: 5px;
  padding: 5px;
}

#submit-button {
  background-color: rgb(166, 166, 188);
  border: none;
  width: 100%;
}

#submit-button:active {
  background-color: #673dda;
}

/* Input for Desktop */
@media (min-width:1024px) {
  #submit-button:hover {
    background-color: rgb(83, 53, 171);
    color: white;
  }
}

/* footer for mobile phone */
footer {
  display: flex;
  display: row;
  justify-content: space-around;
  margin: 2%;
}

.footer-text {
  margin: 0;
  font-size: small;
}

#linkedin {
  color: blue;
  width: 20px;
}