zulip/web/styles/blueslip.css

.blueslip-display {
    display: none;

    &.show {
        display: block;
    }
}

.blueslip-animations {
    &.show {
        animation-name: fadeIn;
        animation-duration: 0.3s;
        animation-fill-mode: forwards;
    }

    &.fade-out {
        animation-name: fadeOut;
        animation-duration: 0.3s;
        animation-fill-mode: forwards;
    }
}

.blueslip-error-container {
    /* We define this variable here since this is shared
       with portico. */
    --blueslip-overlay-translate-y-distance: 100px;
    position: fixed;
    /* Offset to account for the top padding + 5px from the top. */
    top: calc(5px + (-1 * var(--blueslip-overlay-translate-y-distance)));
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: min(calc(100% - 20px), 1100px);
    z-index: 230;
    /* Subtract 5px to account for the bottom margin and another
       5px to account for the top. */
    max-height: calc(100vh - 10px);
    overflow-y: auto;
    overscroll-behavior: contain;
    /* Set top padding to account for the translate-y motion of the
       animation to prevent the vertical scroll bar from appearing. */
    padding-top: var(--blueslip-overlay-translate-y-distance);
    display: flex;
    /* Using column-reverse flex direction enables a stack-like
       behavior where the most recent error is always on top. */
    flex-direction: column-reverse;
    gap: 5px;
}

.stacktrace {
    @extend .blueslip-display, .blueslip-animations;

    box-sizing: border-box;
    width: 100%;
    pointer-events: auto;
    font-size: 1rem;
    color: hsl(0deg 80% 40%);

    padding: 1rem 0;

    background-color: hsl(0deg 100% 98%);
    border-radius: 4px;
    border: 1px solid hsl(0deg 80% 40%);
    box-shadow: 0 0 2px hsl(0deg 80% 40%);

    .stacktrace-header {
        display: flex;
        justify-content: space-between;
        align-items: center;

        .message {
            flex: 1 1 auto;
        }

        .warning-symbol,
        .exit {
            flex: 0 0 auto;
            font-size: 1.3rem;
            padding: 0 1rem;
        }

        .exit::after {
            cursor: pointer;
            font-size: 2.3rem;
            content: "\d7";
            line-height: 0.5;
        }
    }

    .stacktrace-more-info {
        font-size: 0.85rem;
        white-space: pre;
        font-family: "Source Code Pro", monospace;
        margin-left: 3.3rem;
        margin-bottom: 0.5rem;
        padding: 0.5rem;
        background-color: hsl(0deg 7% 98%);
    }

    .stacktrace-content {
        font-family: "Source Code Pro", monospace;
        font-size: 0.85rem;

        margin-bottom: 0.5rem;

        .stackframe {
            overflow-wrap: break-word;
            padding-left: calc(3.3rem - 14px);
            padding-right: 1rem;
        }
    }

    .expand {
        cursor: pointer;
        color: hsl(0deg 32% 83%);

        &:hover {
            color: hsl(0deg 0% 20%);
        }
    }

    .subtle {
        color: hsl(0deg 7% 45%);
    }

    .code-context {
        color: hsl(0deg 7% 15%);
        background-color: hsl(0deg 7% 98%);
        box-shadow:
            inset 0 11px 10px -10px hsl(0deg 7% 70%),
            inset 0 -11px 10px -10px hsl(0deg 7% 70%);

        margin-top: 1em;
        margin-bottom: 1em;

        .code-context-content {
            padding: 1rem 0;
            white-space: pre;
            overflow-x: auto;
        }

        .line-number {
            width: 3rem;
            display: inline-block;
            text-align: right;
            color: hsl(0deg 7% 35%);
        }

        .focus-line {
            background-color: hsl(0deg 7% 90%);
            width: 100%;
        }
    }
}