zulip/static/styles/modal.css

.modal {
    box-shadow: 0 0 75px hsla(0, 0%, 0%, 0.5);
    border: none;
    border-radius: 0;
    overflow: hidden;
    margin-top: 0;
    top: 5%;
    outline: 10000px solid hsla(0, 0%, 0%, 0.3);

    &.fade {
        /* Ensure the modal is entirely off-screen while we fade the background */
        top: -50%;
        transition: opacity 0.3s linear;
        transform: translateY(-50%);

        &.in {
            top: 50%;
            pointer-events: all;
        }
    }

    form {
        margin-bottom: 0;
    }
}

.modal-body {
    max-height: 60vh;
}

.modal-backdrop {
    z-index: 102;
}

.modal-bg {
    background-color: hsl(0, 0%, 98%);
}

/* Styles for the Micromodal-based modals */
.modal__overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: hsla(0, 0%, 0%, 0.6);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 105;
}

.modal__container {
    display: flex;
    flex-direction: column;
    background-color: hsl(0, 0%, 100%);
    max-width: calc(100% - 32px);
    max-height: 96%;
    width: 32.5rem;
    border-radius: 4px;
    box-sizing: border-box;
}

.modal__header {
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal__footer {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    padding: 20px 24px;
}

.modal__title {
    margin: 0;
    font-size: 1.375rem;
    line-height: 1.25;
}

.modal__close {
    &::before {
        content: "\2715";
    }
    margin-right: -4px;
    background: transparent;
    border: 0;

    &:hover {
        background: hsl(0, 0%, 90%);
    }
}

.modal__content {
    font-size: 1rem;
    overflow-y: auto;
    padding: 0 24px;
    line-height: 1.5;
}

.modal__btn {
    font-size: 0.875rem;
    padding: 0.5rem 1rem;
    background-color: hsl(0, 0%, 90%);
    border-radius: 0.25rem;
    border-width: 0;
    cursor: pointer;
    appearance: button;
    text-transform: none;
    overflow: visible;
    outline: none !important;
    line-height: 1.15;
    margin: 0;
    will-change: transform;
    backface-visibility: hidden;
    transform: translateZ(0);
    transition: transform 0.25s ease-out;

    &:focus {
        box-shadow: hsl(198, 76%, 47%) 0 0 0 1px,
            hsla(198, 76%, 47%, 0.3) 0 0 0 5px;
    }
}

.modal__btn:focus,
.modal__btn:hover {
    transform: scale(1.05);
}

.dialog_cancel_button {
    background: hsl(0, 0%, 100%);
    border: 1px solid hsla(300, 2%, 11%, 0.3);

    &:hover {
        background: hsl(0, 0%, 97%);
    }
}

.dialog_submit_button {
    margin-left: 12px;
    background-color: hsl(214, 100%, 31%);
    color: hsl(0, 0%, 100%);
}

@keyframes mmfadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes mmfadeOut {
    from {
        opacity: 1;
    }

    to {
        opacity: 0;
    }
}

.micromodal {
    display: none;
}

.micromodal.modal--opening,
.micromodal.modal--open {
    display: block;
}

.micromodal[aria-hidden="true"] .modal__overlay {
    animation: mmfadeOut 75ms cubic-bezier(0, 0, 0.2, 1);
}

.micromodal[aria-hidden="false"] .modal__overlay {
    animation: mmfadeIn 120ms cubic-bezier(0, 0, 0.2, 1);
}

.micromodal[aria-hidden="true"] .modal__container {
    animation: mmfadeOut 75ms cubic-bezier(0, 0, 0.2, 1);
}

.micromodal[aria-hidden="false"] .modal__container {
    animation: mmfadeIn 120ms cubic-bezier(0, 0, 0.2, 1);
}

.micromodal .modal__container,
.micromodal .modal__overlay {
    will-change: transform;
}

.modal__spinner .loading_indicator_spinner {
    height: 16px;

    path {
        fill: hsl(0, 0%, 100%);
    }
}