:root {
  --color1: #05b1b1;
  --color2: #52339a;
  --grey-bg: #ddd;
}

section {
  padding: 100px 0;
}
header {
  padding: 200px 0;
}
header,
footer {
  background: url(../img/pattern.png), var(--color1);
  background: url(../img/pattern.png),
    linear-gradient(to right, var(--color1) 0%, var(--color2) 100%);
  background-size: contain;
}
.itd_play {
  background-color: var(--color1);
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  margin: 30px auto;
  transition: all 0.2s ease;
}
.itd_pLay:hover {
  background-color: var(--color2);
}
.itd_triange {
  width: 0;
  height: 0;
  border-style: solid;
  border-top-width: 10px;
  border-right-width: 2px;
  border-bottom-width: 10px;
  border-left-width: 10px;
  border-color: transparent transparent transparent var(--bs-white);
}
.btn-itd {
  display: block;
  max-width: 200px;
  margin: 0 auto;
  padding: 8px 30px;
  color: var(--bs-white);
  background-color: var(--color2);
}
.btn-itd:hover {
  color: var(--bs-white);
  background-color: var(--color1);
}
.embed-container {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  max-width: 100%;
}
.embed-container iframe,
.embed-container object,
.embed-container embed {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}
/* о курсе  */
.about,
.author,
.buy,
.shedule {
  background-color: var(--grey-bg);
}
.about i {
  font-size: 25px;
  color: var(--color2);
}
.itd-circle {
  margin: 0 auto 15px;
  width: 70px;
  height: 70px;
  border: 3px solid var(--color2);
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
}
.line {
  width: 100px;
  height: 3px;
  background-color: var(--color1);
  margin: 15px auto 30px;
}
/* Для кого курс */
.forwhom h5 {
  padding: 50px;
  border: 3px solid var(--color1);
}
/* Программа курса (аккордеон) */
.accordion-button:not(.collapsed) {
  color: var(--bs-white);
  background-color: var(--color2);
}
.accordion-button:not(.collapsed)::after {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='white'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
}

/* Процесс обучения  */
.leaning h5 {
  padding: 25px;
  border: 3px solid var(--color1);
}
/* Об авторе */
.author {
  padding-bottom: 0;
}
.itd_img {
  max-width: 260px;
}
/* отзывы */
.rounded {
  border-radius: 50% !important;
  border: 3px solid var(--color1);
}
#footer {
  padding: 30px 0;
}

/* Цвета */
.color1 {
  color: var(--color1);
}
.color2 {
  color: var(--color2);
}
.bg1 {
  background-color: var(--color1);
}
.bg2 {
  background-color: var(--color2);
}