wp-calypso/packages/components/src/dialog/style.scss

@import "@wordpress/base-styles/breakpoints";
@import "@wordpress/base-styles/mixins";

.dialog__backdrop,
.dialog__backdrop.card {
	background-color: color-mix(in srgb, var(--color-neutral-0) 80%, transparent);
	align-items: center;
	bottom: 0;
	left: 0;
	display: flex;
	justify-content: center;
	position: fixed;
	right: 0;
	top: var(--masterbar-height);
	transition: background-color 0.2s ease-in;
	z-index: z-index("root", ".dialog__backdrop"); // try to ensure that dialogs are on top of everything else

	// covers the masterbar as well
	&.is-full-screen {
		top: 0;
	}
}

.dialog__backdrop.is-hidden {
	background-color: transparent;
}

.dialog.card {
	position: relative;
	display: flex;
	flex-direction: column;
	max-width: 90%;
	max-height: 90%;
	margin: auto 0; // IE needs a horizontal margin values to properly center flex item
	padding: 0;
	opacity: 1;
	transition: opacity 0.2s ease-in;
}

.dialog__content {
	padding: 16px;
	overflow-y: auto;

	@include break-mobile {
		padding: 24px;
	}

	&:last-child {
		bottom: 0;
	}

	h1 {
		color: var(--color-neutral-70);
		font-size: 1.375em;
		font-weight: 600;
		margin-bottom: 0.5em;
	}

	p:last-child {
		margin-bottom: 0;
	}
}

.dialog__action-buttons {
	position: relative;
	border-top: 1px solid var(--color-neutral-0);
	padding: 16px;
	margin: 0;
	text-align: right;
	flex-shrink: 0;
	background-color: rgba(255, 255, 255, 1);
	@include break-mobile {
		padding-left: 24px;
		padding-right: 24px;
	}

	@media (max-width: $break-mobile) {
		display: flex;
		flex-direction: column-reverse;
	}

	&::before {
		content: "";
		display: block;
		position: absolute;
		bottom: 100%;
		left: 16px;
		right: 16px;
		height: 24px;
		background: linear-gradient(to bottom, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 1) 100%);
		margin-bottom: 1px;
	}
}

.dialog__action-buttons .button {
	margin-left: 10px;
	min-width: 80px;
	text-align: center;

	.is-left-aligned {
		margin-left: 0;
		margin-right: 10px;
	}

	@media (max-width: $break-mobile) {
		margin: 2px 0;
	}
}

.dialog__action-buttons .is-left-aligned {
	float: left;
}

.dialog__action-buttons-close {
	padding: 15px 15px 5px 5px;
	position: absolute;
	z-index: 1;
	right: 0;
	cursor: pointer;

	&:hover svg {
		opacity: 0.5;
	}
}

.ReactModal__Body--open {
	overflow: hidden;
}

.ReactModal__Html--open {
	overflow: visible;
}