Paper: Elevation 4

.Paper {
    display: block;
    transition: transform $transition-time-default $transition-move-default;
    &._elevation-0 {
        border: 1px solid get-color(neutral, 300);
    }
    &._elevation-1 {
        @include BoxShadow($level: "Card");
    }
    &._elevation-2 {
        @include BoxShadow($level: "Navbar");
    }
    &._elevation-3 {
        @include BoxShadow($level: "Navbar-submenu");
    }
    &._elevation-4 {
        @include BoxShadow($level: "Sidebar");
    }
    &._elevation-5 {
        @include BoxShadow($level: "Modal");
    }
}
a.Paper,
.Paper--interactive {
    color: theme-color(text);
}
a.Paper:active,
a.Paper:hover,
a.Paper:focus,
.Paper--interactive:active,
.Paper--interactive:hover,
.Paper--interactive:focus {
    text-decoration: none;
    &._elevation-1 {
        @include Elevate("Navbar");
    }
    &._elevation-2 {
        @include Elevate("Navbar-submenu");
    }
    &._elevation-3 {
        @include Elevate("Sidebar");
    }
    &._elevation-4 {
        @include Elevate("Modal");
    }
}
.Paper--rounded {
    border-radius: $Border-radius--500;
}