style.css

@import url('https://fonts.googleapis.com/css?family=Source+Sans+Pro:400,400i,700,700i');
@import url('https://fonts.googleapis.com/css?family=Bree+Serif');
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  padding: 0;
  display: flexbox;
  box-sizing: border-box;
  background: #efefef;
  font-family: 'Source Sans Pro', sans-serif;
  color: #333;
}

/* navbar */

#navbar ul {
   width: 100%;
   height: 70px;
   display: flex;
   overflow: hidden;
   position: fixed;
   top: 0;
   margin: 0;
   padding-top: 0;
   list-style: none;
   justify-content: flex-end; 
   align-items: center;
   background-color: #7f7f7f;
   z-index: 1;
}

#navbar ul li {
    padding: 1rem 2rem 1.15rem;
    margin-right: 100px;
    text-transform: uppercase;
    cursor: pointer;
    color: #000000;
    font-size: 40px;
	  min-width: 80px;
    font-weight: bolder;
}
#navbar ul li a {
  text-decoration: none;
  color:#ccc;
}

#navbar ul li:hover {
    background-color: black;
    color: white;
}

#navbar ul li:active {
    transform: translateX(4px); 
}
.sec-cont {
    width: 70%;
    margin: 13rem auto 2rem auto;
    height: 35vmax;
    text-align: justify;
    justify-content: center;

}

.sec-cont h1 {
    font-size: 50px;
    text-align: center;
}

.podkreslnik {
    position: absolute;
    border: 1px solid rgb(63, 62, 62);
    width: 70%;
    margin-top: 80px;
    margin-bottom: 0;
    
}

h1 {
  margin: 0 auto 30px auto;
  padding: 20px;
  font-family: 'Bree Serif', serif;
  font-size: 36px;
  
}

#heading h2 {
    text-align: center;
    font-family: 'Bree Serif', serif;
    font-size: 30px;
    margin: -90px 0 60px 0;
}
p {
  margin-top: 20px;
  margin-bottom: 0;
  padding: 0;
  font-size: 20px;
  line-height: 1.5;
}

.arrow-cont{
  font-size: 32px;
  text-align: center;
  margin: auto;
  padding: 10px;
}

.arrow-cont i {
  margin: auto 50px;
}

.tabs {
  display:flex;
  flex-wrap: wrap;
  max-width: 1200px;
  background: #e5e5e5;
  box-shadow: 0 48px 80px -32px rgba(0,0,0,0.3);
  margin: 3rem auto;
}
.input {
  position: absolute;
  opacity: 0;
}
.label {
  width: 100%;
  padding: 20px 30px;
  background: #e5e5e5;
  cursor: pointer;
  font-weight: bold;
  font-size: 50px;
  color: #7f7f7f;
  transition: background 0.1s, color 0.1s;
}
.label:hover {
  background: #d8d8d8;
}
.label:active {
  background: #ccc;
}
.input:focus + .label {
  z-index: 1;
}
.input:checked + .label {
  background: #fff;
  color: #000;
}
@media (min-width: 600px) {
  .label {
    width: auto;
  }
}
.panel {
  display: none;
  padding: 20px 30px 30px;
  background: #fff;
}
@media (min-width: 600px) {
  .panel {
    order: 99;
  }
}
.input:checked + .label + .panel {
  display: block;
}

#start-btn {
  width: 120px;
  height: 50px;
  margin: 30px 0 ;
  border-radius: 5px;
  cursor: pointer;
  font-size: 1.1rem;
  font-weight: bold;
  font-family: 'Source Sans Pro', sans-serif;
  transition: background 0.3s ease-out;
}

#start-btn:hover {
  background-color: #000;
  color: #ccc;
}

.quest-block h1 {
  margin: 20px auto;
  padding: 20px 20px 20px 0;
}

#myForm {
  text-align: center;
  font-size: 20px;
}

.h2-form {
  margin: 0;
}

#question {
  font-family: 'Source Sans Pro', sans-serif;
  font-size: 20px;
  font-weight: bold;
  margin: 20px 20px 20px 0;
  
}

#fname {
  font-size: 1.5rem;
  width: 70rem;
  height: 10rem;
  text-align: start;
  resize: none;
}

#sub-btn {
  width: 15rem;
  min-height: 4rem;
  margin: 15px auto;
  border-radius: 5px;
  cursor: pointer;
  font-size: 2rem;
  font-family: 'Source Sans Pro', sans-serif;
  transition: background 0.3s ease-out;
}

#sub-btn:hover {
  background-color: #000;
  color: #fff;
}

#question-result {
  font-family: 'Source Sans Pro', sans-serif;
  font-size: 20px;
  font-weight: bold;
  margin: 20px 20px 20px 0;
}

#footer {
  margin: 100px;
  padding: 50px;
}

#footer .column {
    float: left;
    width: 33%;
    padding: 20px;
    align-items: center;
}  
  /* Clear floats after the columns */
.row:after {
    content: "";
    display: table;
    clear: both;
  }

#footer .column .about-col p {
  font-size: 15px;
}

#footer .column ul {
  list-style: none;
}

#footer .column ul li {
  margin: 0 45%;
  justify-content: center;
}

.about-col {
  float: left;
  width: 50%;
  padding: 10px;
  justify-content: center;
  text-align: justify;
}


#footer .social-media {
  font-size: 3rem;
  align-items: center;
}