* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: sans-serif;
}

.main-section {
    width: 750px;
    border-radius: 10px;
    margin: 10px auto;
    padding: 10px 30px 60px;
    box-shadow: 0 8px 14px rgba(0, 0, 0, 0.5);
}

input,
section {
    clear: both;
    display: none;
    padding-top: 10px;
}

label {
    cursor: pointer;
    font-size: 14px;
    font-weight: bold;
    display: block;
    float: left;
    padding: 10px 19px;
    border-top: 2px solid transparent;
    border-right: 1px solid transparent;
    border-left: 1px solid transparent;
    border-bottom: 1px solid #DDD;
}

#c1-tab:checked~#c1-content,
#c2-tab:checked~#c2-content,
#c3-tab:checked~#c3-content,
#c4-tab:checked~#c4-content,
#c5-tab:checked~#c5-content,
#c6-tab:checked~#c6-content,
#c7-tab:checked~#c7-content {
    display: block;
}


/*#home-tab:checked~#home-content,*/
/*#html-tab:checked~#html-content,*/
/*#css-tab:checked~#css-content,*/
/*#javascript-tab:checked~#javascript-content {*/
/*    display: block;*/
/*}*/

input:checked+label {
    font-weight: bold;
    color: red;
    border-top-color: #FFB03D;
    border-right-color: #d5caca;
    border-left-color: #d5caca;
    border-bottom-color: transparent;
/*	background: #e6e6e6/*{bgColorHover}*/ url()/*{bgImgUrlHover}*/ 50%/*{bgHoverXPos}*/ 50%/*{bgHoverYPos}*/ repeat-x/*{bgHoverRepeat}*/; */
/*	font-weight: normal/*{fwDefault}*/; */
/*	color: #000 /*{fcHover} #212121*/; */
}

h2 {
    margin-bottom: 1rem;
}

h3 {
    color: #e65b00;
    margin-bottom: 10px;
}

p {
    font-size: 14px;
    line-height: 18px;
}

.blinking {
  animation-name:animate;
  animation-duration: 2s;
  animation-iteration-count: infinite;
  opacity: 1;
}

@keyframes animate {
  0% {
    opacity: 1;
  }

  50% {
    opacity: 0.5
  }

  100% {
    opacity: 0;
  }
}

.text-red {
  color: red;
}
.blink-hard {
  animation: blinker 1s step-end infinite;
}
.blink-soft {
  animation: blinker 1.5s linear infinite;
}
@keyframes blinker {
  50% {
    opacity: 0;
  }
}