Rocket.Chat/app/theme/client/imports/forms/input.css

textarea.rc-input__element {
	height: auto;
	padding: 0.5rem 1rem;

	font-family: inherit;
}

.rc-input {
	position: relative;

	width: 100%;

	&__label {
		display: block;

		cursor: pointer;
	}

	&__title {
		font-size: var(--input-font-size);
	}

	&__wrapper {
		position: relative;

		padding: 0.5rem 0;

		color: var(--input-icon-color);
	}

	&__icon {
		position: absolute;
		top: 0;
		left: 1rem;

		display: flex;

		width: 20px;
		height: 100%;

		cursor: default;
		align-items: center;
		justify-content: center;

		& + .rc-input__element {
			padding: 0 1rem 0 2.75rem;
		}

		&--right {
			right: 1rem;
			left: auto;
		}

		&--clickable {
			cursor: pointer;
		}

		&--right + .rc-input__element {
			padding: 0 2.75rem 0 1rem;
		}
	}

	&__element {
		width: 100%;
		height: 2.5rem;
		padding: 0 1rem;

		text-align: start;

		text-overflow: ellipsis;

		color: var(--input-text-color);

		border-width: var(--input-border-width);
		border-color: var(--input-border-color);
		border-radius: var(--input-border-radius);
		background-color: transparent;

		font-size: var(--input-font-size);
		line-height: normal;

		&--small {
			height: 2rem;
		}

		&::placeholder {

			text-align: start;
			text-overflow: ellipsis;

			color: var(--input-placeholder-color);
		}

		&[type=color] {
			height: 45px;
		}
	}

	&__description {
		margin-bottom: 0.25rem;

		color: var(--input-description-text-color);

		font-size: var(--input-description-text-size);
	}

	&__error {
		display: flex;

		color: var(--input-error-color);
		align-items: center;

		&-icon {
			width: 20px;

			&--warning {
				width: 20px;
				height: 20px;
				stroke: currentColor;
			}
		}

		&-message {
			margin-left: 0.5rem;
		}
	}

	&--small {
		font-size: 14px;

		& .rc-input__element {
			padding-top: 8px;
			padding-bottom: 8px;
		}
	}

	&--error {
		.rc-tags {
			border-color: var(--input-error-color);
		}

		& .rc-input {
			&__element {
				border-color: var(--input-error-color);
			}
		}
	}
}

.rc-input-file {
	position: relative;

	width: 100%;

	&__label {
		display: block;

		cursor: pointer;
	}

	&__title {
		font-size: var(--input-font-size);
	}

	&__wrapper {
		display: flex;
		flex-direction: row;

		width: 100%;
		margin: 0.5rem 0;
		padding: 0.3rem;

		color: var(--input-text-color);

		border-width: var(--input-border-width);
		border-color: var(--input-border-color);
		border-radius: var(--input-border-radius);
		background-color: transparent;

		font-size: var(--input-font-size);
		align-items: center;
		justify-content: flex-end;

		&::placeholder {
			color: var(--input-placeholder-color);
		}

		& > .rc-button {
			flex: 0 0 auto;

			height: 10px;
			min-height: 31px;
			margin: 0;
			padding: 8px;

			border-color: #e1e5e8;
			border-radius: 2px;
			background: #f1f1f1;
		}
	}

	&__name {

		overflow: hidden;

		flex: 0 1 auto;

		width: 100%;

		padding: 0 5px;

		white-space: nowrap;

		text-overflow: ellipsis;

		line-height: 16px;
	}

	&__element {
		display: none;
	}

	&__description {

		color: var(--color-gray);

		font-size: 0.875rem;
	}
}

select.rc-input {

	width: 100%;
	padding: 0.782rem;

	color: var(--input-text-color);

	border-width: var(--input-border-width);
	border-color: var(--input-border-color);
	border-radius: var(--input-border-radius);
	background-color: transparent;

	font-size: var(--input-font-size);
	appearance: none;

	&--small {
		padding: 0.5rem 1rem;
	}
}