html {
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
  scroll-behavior: smooth;
}

*,
*::before,
*::after {
  -webkit-box-sizing: inherit;
  box-sizing: inherit;
}

:root {
  --white: #ffffff;
  --gray: #535B66;
  --black: #000000;
  --orange: #F4662A;
  --hover-orange: #ED6429;
  --border: #E1E4E7;
  --bg-orange: #FFEED3;
  --bg-blue: #ECF5FE;

}

a {
  color: inherit;
  outline-offset: 0;
  text-decoration: none;
}

h1,
h2,
h3,
h4,
p {
  margin: 0;
}

.header img {
  width: 100%;
}

button {
  font-weight: 500;
  color: var(--white);
  cursor: pointer;
}

section {
  padding-left: 50px;
  padding-right: 50px;
}

@font-face {
  font-family: "Core Sans N 45 Regular";
  src: local('Core Sans N 45 Regular'), local('Core Sans N 45-Regular'), url("../fonts/core_sans_n_45_regular.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap
}

@font-face {
  font-family: "Core Sans A 65 Bold";
  src: local('Core Sans N45 Bold'), local('Core Sans A 65-Bold'), url("../fonts/core_sans_n_65_bold.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap
}

body {
  min-width: 320px;
  font-family: 'Core Sans N 45 Regular', sans-serif;
  font-weight: 400;
  font-size: 20px;
  background-color: var(--white);
  -webkit-text-size-adjust: none;
  color: var(--gray);
  line-height: 1.5em;
  letter-spacing: .3px;
}

.title {
  font-size: 28px;
  margin-bottom: 15px;
  line-height: 32px;
  font-weight: 500;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
}

.list-reset {
  margin: 0;
  padding: 0;
  list-style: none
}

.list-reset li {
  line-height: 1.8em;
  margin-bottom: 10px;
}

.btn-reset {
  padding: 0;
  border: none;
  background-color: transparent;
  height: fit-content;
}

.stop-scroll {
  overflow: hidden;
}

.responsive-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  background-color: rgb(112, 124, 143);
  opacity: 0;
  visibility: hidden;
  transition: all .3s;
}

.stop-scroll .responsive-overlay {
  visibility: visible;
  opacity: .8;
  z-index: 5;
}

.go-top {
  position: fixed;
  left: 25px;
  top: 115px;
  cursor: pointer;
 opacity: 0;
  height: 14px;
  width: 17px;
  border: 1px solid var(--border);
  border-radius: 6px;
  -webkit-transform: rotate(180deg);
  -ms-transform: rotate(180deg);
  transform: rotate(180deg);
  background-image: url(../icon/chevron_orange.svg);
  background-repeat: no-repeat;
  background-position: center center;
  padding: 20px;
  background-color: var(--white);
  z-index: 2;
  -webkit-transition: border-color .3s, opacity .3s;
  -o-transition: border-color .3s, opacity .3s;
  transition: border-color .3s, opacity .3s;
}

/* меняем прозрачность при наведении мышкой */
.go-top:hover {
  border-color: var(--orange);
}

/* модификатор для отображения кнопки */
.go-top--show {
  opacity: 1;
}

.element-animation {
  opacity: 0;
  transform: translateY(20px);
}

.element-animation.element-show {
  opacity: 1;
  transition: all .5s;
  transform: translateY(0%);
}