nextcloud-server/core/css/public.scss

$footer-height: 65px;

#body-public {
	.header-right {

		#header-primary-action a {
			color: var(--color-primary-element-text);
		}

		#header-secondary-action {
			ul li {
				min-width: 270px;
			}
			#header-actions-toggle {
				background-color: transparent;
				border-color: transparent;
				filter: var(--background-invert-if-dark);

				&:hover,
				&:focus,
				&:active {
					opacity: 1;
				}
			}
			#external-share-menu-item {
				form {
					display: flex;
				}
				.hidden {
					display: none;
				}
				#save-button-confirm {
					flex-grow: 0;
				}
			}
		}
	}

	#content {
		// 100% - footer
		min-height: calc(100% - #{$footer-height});

	}

	/** don't apply content header padding on the base layout */
	&.layout-base #content {
		padding-top: 0;
	}

	p.info {
		margin: 20px auto;
		text-shadow: 0 0 2px rgba(0, 0, 0, .4);
		-moz-user-select: none;
		-ms-user-select: none;
		user-select: none;
	}
	p.info, form fieldset legend,
	#datadirContent label,
	form fieldset .warning-info,
	form input[type='checkbox']+label {
		text-align: center;
	}

	/* public footer */
	footer {
		position: fixed;
		display: flex;
		align-items: center;
		justify-content: center;
		height: $footer-height;
		flex-direction: column;
		bottom: 0;
		width: calc(100% - 16px);
		margin: 8px;
		background-color: var(--color-main-background);
		border-radius: var(--border-radius-large);
		p {
			text-align: center;
			color: var(--color-text-lighter);
			a {
				color: var(--color-text-lighter);
				font-weight: bold;
				white-space: nowrap;
				/* increasing clickability to more than the text height */
				padding: 10px;
				margin: -10px;
				line-height: 200%;
			}
		}
	}
}