.header {
    --header-height: 70px;
    flex: 0 0 auto;

    &__background {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        mask-image: linear-gradient(0deg, transparent 0, var(--background-colour) var(--header-height));
        -webkit-mask-image: linear-gradient(0deg, transparent 0, var(--background-colour) var(--header-height));
        background: var(--background-pattern);
        background-color: var(--header-accent-colour);
        background-blend-mode: multiply;
    }

    &__wrapper {
        margin: 0 auto;
        display: flex;
        align-items: center;
        padding: 4px;
        max-width: var(--site-max-width);
        height: var(--header-height);
        transition: height .2s;

        @media (max-width: @site-mobile-width) {
            flex-direction: column;
            height: 100%;
        }
    }

    @media (max-width: @site-mobile-width) {
        &__icons {
            display: flex;
            justify-content: space-between;
            width: 100%;
        }
    }

    &__icon {
        display: none;
        cursor: pointer;
        width: 40px;
        height: 40px;

        &--menu {
            font-size: 3em;
            justify-content: center;
            align-items: center;
        }

        @media (max-width: @site-mobile-width) {
            display: inline-flex;
        }
    }

    &__logo {
        flex: 0 0 auto;
        color: inherit;
        text-decoration: none;
        cursor: pointer;
        display: block;
        background: url('/images/logos/imouto-default.png') no-repeat center / cover;
        width: 60px;
        height: 60px;
        font-size: 0;

        &--manage {
            background-image: url('/images/logos/imouto-broom.png');
        }

        @media (max-width: @site-mobile-width) {
            width: 40px;
            height: 40px;
        }
    }

    &__menu {
        flex: 1 1 auto;
        margin: 0 6px;
        list-style: none;
        display: flex;

        &-toggle {
            display: none;
        }

        @media (max-width: @site-mobile-width) {
            display: none;
            font-size: 1.6em;
            line-height: 1.5em;
            margin-top: 4px;
            width: 100%;
            background: var(--header-accent-colour);

            &-toggle:checked ~ .header__menu {
                display: block;
            }

            &__item:not(:last-child) {
                border-bottom: 1px solid var(--header-accent-colour);
            }

            &__link {
                width: 100%;
                display: block;
                padding: 4px 8px;
                color: inherit;
                text-decoration: none;
            }
        }

        @media (min-width: @site-mobile-width) {
            &__item {
                text-align: center;
                transition: background-color .2s;

                &:hover,
                &:active,
                &:focus {
                    background-color: var(--header-accent-colour);

                    .header__submenu {
                        transform: scaleY(1);
                    }
                }
            }

            &__link {
                font-size: 1.2em;
                color: inherit;
                text-decoration: none;
                display: block;
                padding: 6px 4px;
                min-width: 100px;
                cursor: pointer;
            }
        }
    }

    &__submenu {
        list-style: none;
        display: block;

        @media (max-width: @site-mobile-width) {
            &__link {
                padding: 2px 16px;
                display: block;
                width: 100%;
                color: inherit;
                text-decoration: none;
            }
        }

        @media (min-width: @site-mobile-width) {
            position: absolute; // floating
            transform: scaleY(0);
            transform-origin: center top 0;
            background: var(--header-accent-colour);
            overflow: hidden;
            z-index: 100;
            text-align: left;
            box-shadow: 0 1px 2px var(--header-accent-colour);
            transition: transform .2s;

            &:hover,
            &:focus {
                transform: scaleY(1);
            }

            &__link {
                color: inherit;
                text-decoration: none;
                display: block;
                padding: 2px 6px;
                min-width: 100px;
            }
        }
    }

    &__user {
        flex: 0 0 auto;
        display: flex;
        order: 3;
        align-items: center;

        &-toggle {
            display: none;
        }

        @media (max-width: @site-mobile-width) {
            display: none;
            width: 100%;
            margin-top: 4px;

            &-toggle:checked ~ .header__user {
                display: flex;
            }
        }

        &__avatar {
            width: 60px;
            height: 60px;
            margin-left: 5px;
            transition: box-shadow .2s;
            box-shadow: 0 0 4px #111;

            &:hover,
            &:active,
            &:focus {
                box-shadow: 0 0 4px var(--header-accent-colour);
            }

            @media (max-width: @site-mobile-width) {
                display: none;
            }
        }

        &__button {
            margin: 2px;
            color: inherit;
            text-decoration: none;
            font-size: 1.5em;
            line-height: 1.7em;
            width: 32px;
            height: 32px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: background-color .2s;
            border-radius: 4px;

            &:hover,
            &:focus {
                background-color: fade(#fff, 20%);
            }

            &:active {
                background-color: fade(#fff, 10%);
            }

            @media (max-width: @site-mobile-width) {
                width: 40px;
                height: 40px;
                font-size: 2em;
            }
        }
    }
}