* {
  margin: 0;
  border: 0;
  box-sizing: border-box;
  color: white;
  text-decoration: none;
}

html {
  height: 100%;
}

body {
  min-width: 320px;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.main {
  display: flex;
  justify-content: center;
  flex: 1 0 auto;
  background: url(img/sex-education_left.png) no-repeat calc(50% - 500px),
    url(img/sex-education_right.png) no-repeat calc(50% + 500px),
    linear-gradient(0deg, #99fff8, white 50%, #99fff8);
}

.header {
  text-align: center;
}

.header_main {
  background-color: #008b81;
  color: #fff;
  text-transform: uppercase;
  line-height: 2;
  flex: 0 0 auto;
}

.article {
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  align-items: center;
  height: 100%;
  text-align: center;
}

.main-container {
  width: 500px;
  background-color: #728673;
}

.screen_text {
  text-transform: uppercase;
  letter-spacing: 2px;
}

.seat:checked + label,
.selected {
  background-color: pink;
}

.seat:disabled + label,
.unavailable {
  background-color: #c9c9c9;
}

.seat:disabled + label:hover {
  cursor: not-allowed;
}

.seat:focus + label {
  border: 1px solid red;
}

.seat:active + label {
  transform: scale(1.3);
  border: 2px solid red;
}

.square {
  display: inline-block;
  width: 15px;
  height: 15px;
  border-radius: 3px;
}

.available {
  background-color: #008b81;
}

.submit-button {
  width: 150px;
  height: 50px;
  margin: 10px;
  border-radius: 10px;
  background-color: #375f81;
  outline: none;
}

.submit-button:hover {
  cursor: pointer;
  background-color: #294b69;
}

.submit-button:active {
  border: 1px #fff solid;
}

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

.label {
  display: inline-block;
  margin: 6px;
  width: 30px;
  height: 30px;
  background-color: #008b81;
  border: #375f81 1px solid;
  border-radius: 4px;
}

label:hover {
  background-color: #02dfd0;
  cursor: pointer;
}

.comfort {
  width: 40px;
  margin: 10px;
}

.footer {
  background-color: #008b81;
  flex: 0 0 auto;
}

.footer-content {
  margin: auto;
  display: flex;
  justify-content: space-around;
  align-items: center;
  padding: 20px;
  width: 50vw;
}

.legend-item,
.price-item {
  margin: 10px;
}

.legend,
.price {
  display: flex;
  flex-direction: column;

}

.legend::after,
.price::after {
  content: '';
  position: relative;
  margin-top: 20px;
  width: 100%;
  border-bottom: 1px solid #fff;
}

.place {
  height: 100px;
  width: 200px;
  overflow-y: auto;
}

.email:before {
  content: '\2709  ';
}

.tel::before {
  content: '\1F57F  ';
}

@media screen and (max-width: 680px) {
  .main {
    background: linear-gradient(0deg, #99fff8, white 50%, #99fff8);
  }

  .modal-content {
    width: 80%; 
  }
}

@media screen and (max-width: 1400px) {
  .footer-content {
    flex-direction: column;
    width: 100%;
  }
}