waveterm/frontend/app/tab/tab.scss

// Copyright 2024, Command Line Inc.
// SPDX-License-Identifier: Apache-2.0

.tab {
    position: absolute;
    width: 130px;
    height: calc(100% - 1px);
    padding: 6px 0px 0px;
    box-sizing: border-box;
    font-weight: bold;
    color: var(--secondary-text-color);
    opacity: 0;
	display: flex;
	align-items: center; 
	justify-content: center; 

	&::after {
		content: "";
		position: absolute;
		left: 0;
		width: 1px;
		height: 14px;
		border-right: 1px solid rgb(from var(--main-text-color) r g b / 0.2);
	}

    .tab-inner {
        position: relative;
        width: calc(100% - 6px); 
        height: 100%;
        white-space: nowrap;
		border-radius: 6px;
    }

	&:hover {
		& + .tab::after,
		&::after {
			content: none;
		}

		.tab-inner {
			border-color: transparent;
			background: rgb(from var(--main-text-color) r g b / 0.07);
		}
	}

    &.animate {
        transition:
            transform 0.3s ease,
            background-color 0.3s ease-in-out;
    }

    &.active {
        .tab-inner {
            border-color: transparent;
            border-radius: 6px;
            background: rgb(from var(--main-text-color) r g b / 0.07);
        }

        .name {
            color: var(--main-text-color);
        }

		&+.tab::after,
		&::after {
			content: none;
		}
    }

	&:first-child::after {
		content: none;
	}

    .name {
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate3d(-50%, -50%, 0);
        user-select: none;
        z-index: var(--zindex-tab-name);
        font-size: 11px;
        font-weight: 500;
        text-shadow: 0px 0px 4px rgb(from var(--main-bg-color) r g b / 0.25);
        overflow: hidden;
        width: calc(100% - 10px);
        text-overflow: ellipsis;
        text-align: center;

        &.focused {
            outline: none;
            border: 1px solid rgb(from var(--main-text-color) r g b / 0.179);
            padding: 2px 6px;
            border-radius: 2px;
        }
    }

    .close {
        visibility: hidden;
        position: absolute;
        top: 50%;
        right: 4px;
        transform: translate3d(0, -50%, 0);
        width: 20px;
        height: 20px;
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        z-index: var(--zindex-tab-name);
        padding: 1px 2px;
    }

    &:hover .close {
        visibility: visible;
        backdrop-filter: blur(3px);

        &:hover {
            color: var(--main-text-color);
        }
    }
}

@keyframes expandWidthAndFadeIn {
    from {
        width: var(--initial-tab-width);
        opacity: 0;
    }
    to {
        width: var(--final-tab-width);
        opacity: 1;
    }
}

.tab.new-tab {
    animation: expandWidthAndFadeIn 0.1s forwards;
}