.c-global-nav {
    position: fixed;
    top: 0;
    left: 0;
    z-index: $level--menu;
    width: $gnav--w-collapsed;
    height: 100%;
    background-color: $color--gray-3;
    color: $color--gray-1;

    @media (min-width: $screen--inter) {
        transition: width .5s;
    }

    &__toggle {
        position: absolute;
        top: 52px;
        right: 0;
        padding: 0;
        width: 8px;
        height: 14px;
        overflow: hidden;
        transition: .2s ease-out;

        &:hover {
            width: 12px;
        }

        &-bar {
            position: absolute;
            left: 0;
            top: 0;
            width: 20px;
            height: 2px;
            border-radius: 1px;
            background-color: currentColor;

            &:nth-child(2) {
                top: 6px;
            }

            &:nth-child(3) {
                top: 12px;
            }
        }
    }

    &__search {
        margin-bottom: 0;
        margin-left: 10px;
        margin-right: @margin-left;

        .c-input {
            background-color: transparent;
            border-color: currentColor;
            color: inherit;

            &:focus {
                padding-left: 20px;
                background-color: #fff;
                border-color: inherit;
                border-width: 1px;
            }

            &__label {
                opacity: 0;
            }
        }
    }

    &__title {
        width: 47px;
        margin: 0 auto;
        overflow: hidden;
        transition: $gnav--anim-time-lg ease-out;

        & > .o-logo {
            max-width: none;
            height: 50px;
        }
    }

    &__user {
        flexbox();
        align-items: center;
        width: 100%;
        padding: 0 16px;
        margin-top: $vertical--element-sm;
        margin-bottom: @margin-top;
        overflow: hidden;
        text-align: left;
        transition: $gnav--anim-time-lg ease-out;

        &:hover {
            color: $color--main;
        }

        &-name {
            flex: 1 0 0;
            text-ellipsis();
            opacity: 0;
            transition: opacity $gnav--anim-time-lg ease-out, margin-right $gnav--anim-time-lg ease-out;
        }

        &-icon {
            width: 0;
            opacity: 0;
            transition: width $gnav--anim-time-lg ease-out, opacity $gnav--anim-time-lg ease-out, transform $gnav--anim-time-lg ease-out;
        }
    }

    &__avatar {
        width: 48px;
        height: @width;
        transition: $gnav--anim-time-lg ease-out;
    }

    &__menu {
        margin-top: $vertical--element-sm;

        @media (min-width: $screen--inter) {
            $offset--padding-top    = 40px;
            $offset--logo           = 64px;
            $offset--user           = 88px;
            $offset--search         = 60px;
            $offset--margin-top     = @margin-top;

            $offset--total          = $offset--padding-top + $offset--logo + $offset--user + $offset--search + $offset--margin-top;

            max-height: 'calc(100vh - %s)' % $offset--total;
            overflow-y: auto;
            overflow-x: hidden;

            scrollbar();
        }
    }

    &__subtitle {
        padding-left: 20px;
        padding-right: @padding-left;
        margin-top: 30px;
        margin-bottom: @margin-top;
        opacity: 0;
        color: $color--main-dark;
        transition: .2s ease-out;
    }

    &__level1 {
        position: relative;
        z-index: 1;
        height: 100%;
        max-width: $gnav--w-open;
        padding-top: 20px;
        overflow-x: hidden;
        overflow-y: auto;
        background-color: @background-color;

        scrollbar();

        @media (min-width: $screen--inter) {
            padding-top: 40px;
            overflow: visible;
        }    
    }

    &__level2 {
        position: absolute;
        left: -($gnav--w-open);
        top: 0;
        height: 100%;
        padding-top: 20px;
        width: $gnav--w-open;
        background-color: $color--gray-2;
        transition: $gnav--anim-time-sm;

        &-back {
            margin-bottom: 48px;

            .c-menu {
                &__link {
                    padding-top: 0;
                    padding-bottom: 0;
                    width: 100%;
                    font-size: 1.2em;
                    text-align: left;
                    text-transform: none;
                    font-weight: $font--bold;
                }
                &__icon {
                    font-size: 15px;
                }
                &__label {
                    color: $color--main-dark;
                }
            }
        }

        @media (min-width: $screen--inter) {
            left: auto;
            right: 0;
            padding-top: 124px;
            transition: none;

            &-back {
                display: none;
            }
        }
    }

    &__backdrop {
        position: fixed;
        top: 0;
        left: -100%;
        z-index: $level--menu - 1;
        width: 100%;
        height: 100%;
        background-color: #000;
        opacity: 0;
        pointer-events: none;
        transition: opacity 1s ease-out, left 0s 1s;
    }

    &.is-open {
        display: block;
        width: $gnav--w-open;
        height: 100%;
        padding-left: 0;
        padding-right: @padding-left;

        .c-global-nav {
            &__title {
                width: 190px;
            }

            &__user {
                &-name {
                    margin-right: 10px;
                    opacity: 1;
                }

                &-icon {
                    width: 1em;
                    opacity: 1;
                }
            }

            &__avatar {
                margin-right: 10px;    
            }

            &__search {
                .c-input {
                    &__label {
                        opacity: 1;
                    }
                }
            }

            &__subtitle {
                opacity: 1;
            }
        }

        &.has-sublevel {
            .c-global-nav {
                &__user-icon {
                    transform: rotate(-180deg);
                }
            }

            @media (min-width: $screen--inter) {
                width: $gnav--w-open * 2;
            }
        }

        @media (max-width: ($screen--inter - 1)) {
            box-shadow: 0 0px 10px 5px rgba(0,0,0,0.25);
            animation: open-menu-mobile $gnav--anim-time-sm;

            .c-global-nav {
                &__title,
                &__search {
                    display: none;
                }

                &__toggle {
                    position: relative;
                    top: auto;
                    right: auto;
                    width: 20px;
                    height: 20px;
                    margin-left: 20px;
                    transform: rotate(45deg);

                    &-bar {
                        &:nth-child(1) {
                            left: calc(50% - 1px);
                            width: 2px;
                            height: 20px;    
                        }

                        &:nth-child(2) {
                            opacity: 0;
                        }

                        &:nth-child(3) {
                            top: calc(50% - 1px);    
                        }
                    }
                }

                &__level2 {
                    z-index: 2;
                }
            }

            & ~ .c-global-nav__backdrop {
                left: 0;
                opacity: .5;
                pointer-events: auto;
                transition: opacity $gnav--anim-time-sm ease-out;
            }

            &.has-sublevel {
                & > .c-global-nav__level2 {
                    left: 0;
                }
            }
        }
    }

    &:not(.is-open) {
        @media (max-width: ($screen--inter - 1)) {
            width: 100%;
            height: $gnav--h-sm;
            overflow: hidden;
            transition: none;
            
            .c-global-nav {
                &__title,
                &__user,
                &__menu {
                    position: absolute;
                    bottom: 100%;
                    opacity: 0;
                    pointer-events: none;
                }

                &__toggle {
                    position: relative;
                    top: 0;
                    right: 0;
                    width: 20px;
                    transition: none;
                }

                &__search {
                    margin: 0;

                    .c-input {
                        $search-width = 240px;

                        width: $search-width;
                        &:not(:focus) {
                            border-color: transparent;
                            width: 45px;

                            & ~ .c-input {
                                &__label {
                                    opacity: 0;
                                }
                            }

                            &:not(:placeholder-shown) {
                                border-color: currentColor;
                                width: $search-width;

                                & ~ .c-input {
                                    &__label {
                                        opacity: 1;
                                    }
                                }
                            }
                        }

                        &__label {
                            opacity: 1;
                        }
                    }
                }

                &__level1 {
                    flexbox();
                    align-items: center;
                    justify-content: space-between;
                    padding-top: 0;
                    padding-left: 20px;
                    padding-right: @padding-left;
                    width: 100%;
                    max-width: 100%;
                    height: 100%;
                }
            }
        }

        @media (min-width: $screen--inter) {
            .c-global-nav {
                &__search {
                    .c-input {
                        padding-right: 38px;

                        &__icon {
                            right: 16px;
                        }
                    }
                }
            }
            .c-menu {
                &__link {
                    padding-left: 28px;
                    padding-right: 0;
                }

                &__icon {
                    margin-right: 0;
                }

                &__label {
                    opacity: 0;
                }
            }
        }
    }
}

@keyframes open-menu-mobile {
    0% {
        top: -($gnav--h-sm);
        left: 0;
        opacity: 0
    }
    1% {
        top: 0;
        left: -($gnav--w-open);
        opacity: 1;
    }
    100% {
        top: 0;
        left: 0;
        opacity: 1;
    }
}