website/assets/scss/partials/sidebar.scss

// -----------
// - sidebar -
// -----------

#sidebar {
	background: var(--sidebar-background);
	display: flex;
	flex-direction: column;
	justify-content: space-between;
	gap: 1em;
	height: calc(100vh - 1rem);
	padding: 0.25rem;
	position: fixed;
	top: 0;
	width: 5rem;
	z-index: 2;
	margin: 0.5rem 0;
	border-radius: 0 2rem 2rem 0;
	border: 1px solid var(--sidebar-border);
	border-left: 0;

	@media (max-width: 1140px) {
		overflow: unset;
		border: 0;
		position: unset;
		height: 0;
		padding: 0;
		margin: 0;
		background-color: transparent;
	}

	a {
		&.hint-text {
			position: relative;

			&::before {
				content: attr(data-title);
				left: calc(100% + 0.5rem);
				position: absolute;
				top: 50%;
				transform: translateY(-50%);
				background-color: var(--sidebar-accent-3);
				color: var(--text-accent-900);
				padding: 0.2rem 0.5rem;
				border-radius: 0.5rem;
				pointer-events: none;
				opacity: 0%;
				z-index: 201;
				
				@media (prefers-reduced-motion: no-preference) {
					transition: opacity 0.3s ease-in-out;
				}
			}

			&::after {
				content: "";
				transform: translate(-50%, -50%) rotate(45deg);
				transform-origin: center;
				background-color: var(--sidebar-accent-3);
				top: 50%;
				height: 1.2rem;
				width: 1.2rem;
				z-index: 200;
				border-radius: 0 0 0 0.5rem;
				position: absolute;
				left: calc(100% + 0.5rem);
				pointer-events: none;
				opacity: 0%;
				
				@media (prefers-reduced-motion: no-preference) {
					transition: opacity 0.3s ease-in-out;
				}
			}

			&:hover {

				&::before, &::after {
					opacity: 100%;
				}
			}
		}
	}

	header {
		text-align: center;
		user-select: none;
		padding: inherit;

		#avatar {
			border-radius: 300% 500% / 500% 300%;
			max-width: 64px;

			@media (max-width: 1140px) {
				position: absolute;
				top: 1rem;
				left: 1rem;
			}

			@media (prefers-reduced-motion: no-preference) {
				transition: 0.4s border-radius ease-in-out;
			}

			&:hover {
				border-radius: 500% 300% / 300% 500%;
			}
		}
	}
	#sidebar-menu {
		user-select: none;
		text-align: center;

		@media (max-width: 1140px) {
			position: fixed;
			width: 100vw;
			background-color: var(--sidebar-background);
			height: 5rem;
			left: 0;
			bottom: 0;
			padding: 0.4rem;
			border: 1px solid var(--sidebar-border);
			border-bottom: 0;
		}

		ul {
			list-style: none;
			padding: 0;
			margin: 0;

			@media (max-width: 1140px) {
				display: flex;
				flex-direction: row;
				justify-content: center;
				height: 100%;
			}
		}

		li {
			border-radius: 0.5rem;
			margin: 0.5em 0;
			position: relative;
			letter-spacing: 0.025rem;
			aspect-ratio: 1 / 1;
			display: flex;
			align-items: center;
			justify-content: center;
			
			@media (max-width: 1140px) {
				margin: 0 0.5rem;
			}

			@media (prefers-reduced-motion: no-preference) {
				transition: background-color 0.2s linear;
			}

			a {
				overflow: visible;
				display: flex;
				align-items: center;
				width: 100%;
				height: 100%;
			}

			&::after {
				background-color: var(--sidebar-accent-1);
				bottom: 0;
				content: "";
				height: 100%;
				position: absolute;
				left: -100%;
				top: 0;
				width: 100%;
				z-index: -1;
				opacity: 1;
				opacity: 0.5;
				border-radius: 0.5rem;
				
				@media (max-width: 1140px) {
					left: 0;
					top: 100%;
				}
				
				@media (prefers-reduced-motion: no-preference) {
					transition: left 0.5s ease-out, opacity 0.5s ease-out, background-color 0.2s linear, top 0.5s ease-out;
				}
			}

			&.active {
				background-color: var(--sidebar-accent-1);

				&:hover {
					background-color: var(--sidebar-accent-2);
				}

				&:active {
					background-color: var(--sidebar-accent-3);
				}
			}

			&:hover {

				&::after {
					left: 0;
					opacity: 1;

					@media (max-width: 1140px) {
						top: 0;
					}
				}
			}

			&:active {

				&::after {
					background-color: var(--sidebar-accent-2);
				}
			}
		}

		a {
			text-decoration: none;
			display: flex;
			place-content: center;

			svg {
				height: 3rem;
				width: 3rem;
				fill: transparent;
				stroke: var(--text-accent-300);
				stroke-width: 20px;
			}
		}
	}
	aside {
		#social-links {
			text-align: center;

			@media (max-width: 1140px) {
				display: none;
			}

			a {
				display: flex;
				padding: 1rem;
				place-content: center;
				
				&:hover {
					.mastodon-icon {
						color: hsl(251.5, 58.9%, 51.4%);
					}
				}

				.mastodon-icon {
					color: hsl(239.6, 100%, 69.4%);
				}

				.icon {
					height: 1.25rem;
					width: 1.25rem;
					display: block;
					
					@media (prefers-reduced-motion: no-preference) {
						transition: color 0.2s ease-in-out;
					}
				}
			}
		}
		#languages {
			text-align: center;
			border-radius: 0.5rem 0.5rem 1.85rem 0.5rem;
			
			@media (max-width: 1140px) {
				border-radius: 4rem;
				position: absolute;
				top: 1rem;
				left: calc(100vw - 1em - 64px);
				font-size: 1.4rem;
				border-radius: 100%;
				background-color: var(--sidebar-accent-1);
				aspect-ratio: 1 / 1;
				width: 64px;
				display: flex;
				align-items: center;
				justify-content: center;
				overflow: hidden;
			}
			@media (prefers-reduced-motion: no-preference) {
				transition: background-color 0.2s ease-in-out;
			}

			&:hover {
				background-color: var(--sidebar-accent-1);

				@media (max-width: 1140px) {
					background-color: var(--sidebar-accent-2);
				}
			}
			&:active {
				background-color: var(--sidebar-accent-2);

				@media (max-width: 1140px) {
					background-color: var(--sidebar-accent-3);
				}
			}

			#language {
				display: block;
				text-decoration: none;
				width: 100%;
				height: 100%;
				padding: 1rem;
				pointer-events: all;
			}
		}
	}
}