body {
	font-family: 'Roboto Condensed', sans-serif;
	font-size: 16px;
	color: #373d44;
	margin: 0;
	padding: 0;
}
.f-light {
	font-weight: 300;
}
.f-regular {
	font-weight: 400;
}
.f-bold {
	font-weight: 700;
}
.c-black {
	color: #000;
}
.size-20 {
	font-size: 20px;
}
img {
	max-width: 100%;
}
.main-section {
	position: relative;
	min-height: 100vh;
	background: url("../img/under_desktop.jpg") no-repeat center center / cover;
	padding-bottom: 2em;
}
.flex-grow-1 {
	flex: 1;
}
.container {
	max-width: 1140px;
}
.header-phone {
	font-size: 3.1rem;
	color: #000;
	text-shadow: 0 2px 3px #fff, 0 -2px 3px #fff;
	transition: all .3s ease-in-out 0s;
}
.text-shadow {
	text-shadow: 0 2px 3px #fff, 0 -2px 3px #fff;
}
.header-phone:hover, .header-phone:focus {
	outline: none;
}
h1 {
	color: #209ada;
	font-size: 4.7em;
	line-height: 120%;
}
@media screen and (max-width: 768px) {
	.main-section {
		position: relative;
		min-height: 100vh;
		background: url("../img/under_mobile.jpg") no-repeat center top / cover;
		padding-bottom: 8em;
	}
	.header > div {
		width: 100%;
		text-align: center;
	}
	.header > div:first-of-type {
		padding-bottom: 1.5em;
	}
	.header-phone {
		font-size: 3.9rem;
	}
	h1 {
		font-size: 4.2em;
	}
}
@media screen and (max-width: 480px){
	h1 {
		font-size: 3.5em;
	}
	.header-phone {
		font-size: 2.3rem;
	}
}
@media screen and (max-width: 380px){
	h1 {
		font-size: 2.5em;
	}
	.header-phone {
		font-size: 2.3rem;
	}
}
@media screen and (max-width: 330px) {
	.size-20 {
		font-size: 15px;
	}
}