nginxconfig.io/resources/scss/_header.scss

@keyframes sk-bounce {
	0%, 100% {
		transform: scale(0.0);
	} 50% {
		transform: scale(1.0);
	}
}

header {
	background-color: #000;
	padding: 0.5rem 0;
	text-align: center;
	margin-bottom: 0.5rem;
	color: #fff;
	font-size: 2.2rem;

	.container {
		position: relative;
	}

	.loader {
		position: absolute;
		top: 5px;
		left: 50%;
		pointer-events: none;
		margin-left: -230px;

		.spinner {
			width: 50px;
			height: 50px;
			position: relative;

			.double-bounce1,
			.double-bounce2 {
				width: 100%;
				height: 100%;
				border-radius: 50%;
				background-color: #999;
				opacity: 0.6;
				position: absolute;
				top: 0;
				left: 0;
				animation: sk-bounce 2.0s infinite ease-in-out;
			}

			.double-bounce2 {
				animation-delay: -1.0s;
			}
		}
	}

	.logo {
		height: 3rem;
		margin-bottom: 0.5rem;
	}

	.github {
		@include media-breakpoint-up(lg) {
			position: absolute;
			right: 15px;
			top: 10px;
		}

		.github-link {
			text-align: center;
			font-size: 1rem;
			margin-bottom: 0.5rem;

			a {
				color: #fff;
			}

			small {
				font-size: 90%;
			}

			svg {
				height: 1.2rem;
				vertical-align: -4px;

				g {
					fill: #fff;
				}
			}
		}

		.github-star {
			width: 144px;
			height: 30px;
			display: block;
			border: 0;
			overflow: hidden;
			margin: 0 auto 0.25rem;

			@include media-breakpoint-up(lg) {
				margin-left: auto;
			}
		}
	}

	.sites {
		@include media-breakpoint-up(lg) {
			margin-top: -1rem;
		}
	}

	.sites,
	.presets {
		font-size: 0;
		text-align: center;

		@include media-breakpoint-up(lg) {
			text-align: left;
		}
	}

	.sites .title,
	.presets .title {
		color: #eee;
		font-size: 0.9rem;
		line-height: 1.9rem;
		font-style: italic;
		vertical-align: top;
		margin-right: 4px;
		text-align: center;

		@include media-breakpoint-up(lg) {
			display: inline-block;
			width: 60px;
		}
	}

	.sites .group,
	.presets .group {
		@include media-breakpoint-up(lg) {
			display: inline-block;
			vertical-align: top;
		}
	}

	.sites .group {
		@include media-breakpoint-up(lg) {
			width: calc(100% - 290px);
		}
	}

	.presets .group {
		@include media-breakpoint-up(lg) {
			width: calc(100% - 64px);
		}
	}

	.btn-outline-light {
		box-shadow: none !important;
		border-color: #999;
		margin: 0 3px 4px;

		&.active,
		&:hover {
			background-color: #fff;
			border-color: #fff;

			svg {
				path {
					fill: #000;
				}
			}
		}

		svg {
			height: 1.1rem;
			vertical-align: text-bottom;

			path {
				fill: #ddd;
				transition: fill 0.15s ease-in-out;
			}
		}

		small {
			margin-left: 0.2rem;
			font-weight: 700;
			vertical-align: 1px;
		}

		.close {
			float: none;
			vertical-align: -2px;
			color: #666;
			line-height: 0;
			margin-right: -0.3rem;
			font-size: 1.3rem;
		}
	}
}