//
// Navbars
// --------------------------------------------------

// Wrapper and base class
//
// Provide a static navbar from which we expand to create full-width, fixed, and
// other navbar variations.

.navbar {
    position: relative;
    min-height: @navbar-height; // Ensure a navbar always shows (e.g., without a .navbar-brand in collapsed mode)
    margin-bottom: @navbar-margin-bottom;

    // Prevent floats from breaking the navbar
    &:extend(.clearfix all);

    @media (min-width: @grid-float-breakpoint) {
        border-radius: @navbar-border-radius;
    }

    &.header {
        height: @navbar-height;
    }
}

// Navbar heading
//
// Groups `.navbar-brand` and `.navbar-toggle` into a single component for easy
// styling of responsive aspects.

.navbar-header {
    &:extend(.clearfix all);

    @media (min-width: @grid-float-breakpoint) {
        float: left;
    }
}

// Navbar collapse (body)
//
// Group your navbar content into this for easy collapsing and expanding across
// various device sizes. By default, this content is collapsed when <768px, but
// will expand past that for a horizontal display.
//
// To start (on mobile devices) the navbar links, forms, and buttons are stacked
// vertically and include a `max-height` to overflow in case you have too much
// content for the user's viewport.

.navbar-collapse {
    overflow-x: visible;
    padding-right: @navbar-padding-horizontal;
    padding-left: @navbar-padding-horizontal;
    border-top: 1px solid transparent;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, .1);
    &:extend(.clearfix all);
    -webkit-overflow-scrolling: touch;

    &.in {
        overflow-y: auto;
    }

    // Open dropdowns
    .open > a {
        &,
        &:hover,
        &:focus {
            border: medium none;
        }
    }

    @media (min-width: @grid-float-breakpoint) {
        width: auto;
        border-top: 0;
        box-shadow: none;

        &.collapse {
            display: block !important;
            height: auto !important;
            padding-bottom: 0; // Override default setting
            overflow: visible !important;
        }

        &.in {
            overflow-y: visible;
        }

        // Undo the collapse side padding for navbars with containers to ensure
        // alignment of right-aligned contents.
        .navbar-fixed-top &,
        .navbar-static-top &,
        .navbar-fixed-bottom & {
            padding-left: 0;
            padding-right: 0;
        }
    }
}

.navbar-fixed-top,
.navbar-fixed-bottom {
    .navbar-collapse {
        max-height: @navbar-collapse-max-height;

        @media (max-device-width: @screen-xs-min) and (orientation: landscape) {
            max-height: 200px;
        }
    }
}

// Both navbar header and collapse
//
// When a container is present, change the behavior of the header and collapse.

.container,
.container-fluid {
    > .navbar-header,
    > .navbar-collapse {
        margin-right: -@navbar-padding-horizontal;
        margin-left: -@navbar-padding-horizontal;

        @media (min-width: @grid-float-breakpoint) {
            margin-right: 0;
            margin-left: 0;
        }
    }
}

//
// Navbar alignment options
//
// Display the navbar across the entirety of the page or fixed it to the top or
// bottom of the page.

// Static top (unfixed, but 100% wide) navbar
.navbar-static-top {
    z-index: @zindex-navbar;
    border-width: 0 0 1px;

    @media (min-width: @grid-float-breakpoint) {
        border-radius: 0;
    }
}

// Fix the top/bottom navbars when screen real estate supports it
.navbar-fixed-top,
.navbar-fixed-bottom {
    position: fixed;
    right: 0;
    left: 0;
    z-index: @zindex-navbar-fixed;

    // Undo the rounded corners
    @media (min-width: @grid-float-breakpoint) {
        border-radius: 0;
    }
}

.navbar-fixed-top {
    top: 0;
}

.navbar-fixed-bottom {
    bottom: 0;
    margin-bottom: 0; // override .navbar defaults
    border-width: 1px 0 0;
}

// Brand/project name

.navbar-brand {
    float: left;
    padding: @navbar-padding-vertical @navbar-padding-horizontal;
    font-size: @font-size-large;
    line-height: @line-height-computed;
    height: @navbar-height;

    &:hover,
    &:focus {
        text-decoration: none;
    }

    > img {
        display: block;
    }

    @media (min-width: @grid-float-breakpoint) {
        .navbar > .container &,
        .navbar > .container-fluid & {
            margin-left: -@navbar-padding-horizontal;
        }

        .navbar-collapse .navbar .dropdown-menu {
            top: inherit;
        }
    }
}

// Navbar toggle
//
// Custom button for toggling the `.navbar-collapse`, powered by the collapse
// JavaScript plugin.

.navbar-toggle {
    position: relative;
    float: right;
    margin-right: @navbar-padding-horizontal;
    padding: 9px 10px;
    .navbar-vertical-align(34px);
    background-color: transparent;
    background-image: none; // Reset unusual Firefox-on-Android default style; see https://github.com/necolas/normalize.css/issues/214
    border: 1px solid transparent;
    border-radius: @border-radius-base;

    // We remove the `outline` here, but later compensate by attaching `:hover`
    // styles to `:focus`.
    &:focus {
        outline: 0;
    }

    // Bars
    .icon-bar {
        display: block;
        width: 22px;
        height: 2px;
        border-radius: 1px;
    }
    .icon-bar + .icon-bar {
        margin-top: 4px;
    }

    @media (min-width: @grid-float-breakpoint) {
        display: none;
    }
}

// Navbar nav links
//
// Builds on top of the `.nav` components with its own modifier class to make
// the nav the full height of the horizontal nav (above 768px).

.navbar-nav {
    margin: (@navbar-padding-vertical / 2) -@navbar-padding-horizontal;

    > li > a {
        padding-top: 10px;
        padding-bottom: 10px;
        line-height: @line-height-computed;
    }

    .open > .dropdown-menu {
        top: inherit;
    }

    @media (max-width: @grid-float-breakpoint-max) {
        // Dropdowns get custom display when collapsed
        .open > .dropdown-menu {
            position: static;
            float: none;
            width: auto;
            margin-top: 0;
            background-color: transparent;
            border: 0;
            box-shadow: none;
            > li > a,
            .dropdown-header {
                padding: 5px 15px 5px 25px;
            }
            > li > a {
                line-height: @line-height-computed;
                &:hover,
                &:focus {
                    background-image: none;
                }
            }
        }
    }

    // Uncollapse the nav
    @media (min-width: @grid-float-breakpoint) {
        float: left;
        margin: 0;

        > li, > .open {
            float: left;
            > a {
                padding-top: @navbar-padding-vertical !important;
                padding-bottom: @navbar-padding-vertical;
            }
        }
    }

    // Mobile screen show panel
    @media (max-width: @grid-float-breakpoint) {
        margin: -1px 0 0;
        min-width: 50%;
        position: absolute;
        right: 0;
        background-color: @base-color;
    }
}

// Navbar form
//
// Extension of the `.form-inline` with some extra flavor for optimum display in
// our navbars.

.navbar-form {
    margin-left: -@navbar-padding-horizontal;
    margin-right: -@navbar-padding-horizontal;
    padding: 10px @navbar-padding-horizontal;
    border-top: 1px solid transparent;
    border-bottom: 1px solid transparent;
    @shadow: inset 0 1px 0 rgba(255, 255, 255, .1), 0 1px 0 rgba(255, 255, 255, .1);
    .box-shadow(@shadow);

    // Mixin behavior for optimum display
    .form-inline();

    .form-group {
        @media (max-width: @grid-float-breakpoint-max) {
            margin-bottom: 5px;

            &:last-child {
                margin-bottom: 0;
            }
        }
    }

    // Vertically center in expanded, horizontal navbar
    .navbar-vertical-align(@input-height-base);

    // Undo 100% width for pull classes
    @media (min-width: @grid-float-breakpoint) {
        width: auto;
        border: 0;
        margin-left: 0;
        margin-right: 0;
        padding-top: 0;
        padding-bottom: 0;
        .box-shadow(none);
    }
}

// Dropdown menus

// Menu position and menu carets
.navbar-nav > li > .dropdown-menu {
    margin-top: 0;
    .border-top-radius(0);
}

// Menu position and menu caret support for dropups via extra dropup class
.navbar-fixed-bottom .navbar-nav > li > .dropdown-menu {
    margin-bottom: 0;
    .border-top-radius(@navbar-border-radius);
    .border-bottom-radius(0);
}

// Buttons in navbars
//
// Vertically center a button within a navbar (when *not* in a form).

.navbar-btn {
    .navbar-vertical-align(@input-height-base);

    &.btn-sm {
        .navbar-vertical-align(@input-height-small);
    }
    &.btn-xs {
        .navbar-vertical-align(22);
    }
}

// Text in navbars
//
// Add a class to make any element properly align itself vertically within the navbars.

.navbar-text {
    .navbar-vertical-align(@line-height-computed);

    @media (min-width: @grid-float-breakpoint) {
        float: left;
        margin-left: @navbar-padding-horizontal;
        margin-right: @navbar-padding-horizontal;
    }
}

// Component alignment
//
// Repurpose the pull utilities as their own navbar utilities to avoid specificity
// issues with parents and chaining. Only do this when the navbar is uncollapsed
// though so that navbar contents properly stack and align in mobile.
//
// Declared after the navbar components to ensure more specificity on the margins.

@media (min-width: @grid-float-breakpoint) {
    .navbar-left {
        .pull-left();
    }

    .navbar-right {
        .pull-right();
        margin-right: -@navbar-padding-horizontal;

        ~ .navbar-right {
            margin-right: 0;
        }
    }
}

// Alternate navbars
// --------------------------------------------------

// Default navbar
.navbar-default {
    background-color: @navbar-default-bg;
    border-color: @navbar-default-border;

    .navbar-brand {
        color: @navbar-default-brand-color;
        &:hover,
        &:focus {
            color: @navbar-default-brand-hover-color;
            background-color: @navbar-default-brand-hover-bg;
        }
    }

    .navbar-text {
        color: @navbar-default-color;
    }

    .navbar-nav {
        > li > a {
            color: @navbar-default-link-color;

            &:hover,
            &:focus {
                color: @navbar-default-link-hover-color;
                background-color: @navbar-default-link-hover-bg;
            }
        }
        > .active > a {
            &,
            &:hover,
            &:focus {
                color: @navbar-default-link-active-color;
                background-color: @navbar-default-link-active-bg;
            }
        }
        > .disabled > a {
            &,
            &:hover,
            &:focus {
                color: @navbar-default-link-disabled-color;
                background-color: @navbar-default-link-disabled-bg;
            }
        }
    }

    .navbar-toggle {
        border-color: @navbar-default-toggle-border-color;
        &:hover,
        &:focus {
            background-color: @navbar-default-toggle-hover-bg;
        }
        .icon-bar {
            background-color: @navbar-default-toggle-icon-bar-bg;
        }
    }

    .navbar-collapse,
    .navbar-form {
        border-color: @navbar-default-border;
    }

    // Dropdown menu items
    .navbar-nav {
        // Remove background color from open dropdown
        > .open > a {
            &,
            &:hover,
            &:focus {
                background-color: @navbar-default-link-active-bg;
                color: @navbar-default-link-active-color;
            }
        }

        @media (max-width: @grid-float-breakpoint-max) {
            // Dropdowns get custom display when collapsed
            .open .dropdown-menu {
                > li > a {
                    color: @navbar-default-link-color;
                    &:hover,
                    &:focus {
                        color: @navbar-default-link-hover-color;
                        background-color: @navbar-default-link-hover-bg;
                    }
                }
                > .active > a {
                    &,
                    &:hover,
                    &:focus {
                        color: @navbar-default-link-active-color;
                        background-color: @navbar-default-link-active-bg;
                    }
                }
                > .disabled > a {
                    &,
                    &:hover,
                    &:focus {
                        color: @navbar-default-link-disabled-color;
                        background-color: @navbar-default-link-disabled-bg;
                    }
                }
            }
        }
    }

    // Links in navbars
    //
    // Add a class to ensure links outside the navbar nav are colored correctly.

    .navbar-link {
        color: @navbar-default-link-color;
        &:hover {
            color: @navbar-default-link-hover-color;
        }
    }

    .btn-link {
        color: @navbar-default-link-color;
        &:hover,
        &:focus {
            color: @navbar-default-link-hover-color;
        }
        &[disabled],
        fieldset[disabled] & {
            &:hover,
            &:focus {
                color: @navbar-default-link-disabled-color;
            }
        }
    }
}

// Inverse navbar

.navbar-inverse {
    background-color: @navbar-inverse-bg;
    border-color: @navbar-inverse-border;

    .navbar-brand {
        color: @navbar-inverse-brand-color;
        &:hover,
        &:focus {
            color: @navbar-inverse-brand-hover-color;
            background-color: @navbar-inverse-brand-hover-bg;
        }
    }

    .navbar-text {
        color: @navbar-inverse-color;
    }

    .navbar-nav {
        > li > a {
            color: @navbar-inverse-link-color;

            &:hover,
            &:focus {
                color: @navbar-inverse-link-hover-color;
                background-color: @navbar-inverse-link-hover-bg;
            }
        }
        > .active > a {
            &,
            &:hover,
            &:focus {
                color: @navbar-inverse-link-active-color;
                background-color: @navbar-inverse-link-active-bg;
            }
        }
        > .disabled > a {
            &,
            &:hover,
            &:focus {
                color: @navbar-inverse-link-disabled-color;
                background-color: @navbar-inverse-link-disabled-bg;
            }
        }
    }

    // Darken the responsive nav toggle
    .navbar-toggle {
        border-color: @navbar-inverse-toggle-border-color;
        &:hover,
        &:focus {
            background-color: @navbar-inverse-toggle-hover-bg;
        }
        .icon-bar {
            background-color: @navbar-inverse-toggle-icon-bar-bg;
        }
    }

    // Dropdowns
    .navbar-nav {
        > .open > a {
            &,
            &:hover,
            &:focus {
                background-color: @navbar-inverse-link-active-bg;
                color: @navbar-inverse-link-active-color;
            }
        }

        @media (max-width: @grid-float-breakpoint-max) {
            // Dropdowns get custom display
            .open .dropdown-menu {
                > .dropdown-header {
                    border-color: @navbar-inverse-border;
                }
                .divider {
                    background-color: @navbar-inverse-border;
                }
                > li > a {
                    color: @navbar-inverse-link-color;
                    &:hover,
                    &:focus {
                        color: @navbar-inverse-link-hover-color;
                        background-color: @navbar-inverse-link-hover-bg;
                    }
                }
                > .active > a {
                    &,
                    &:hover,
                    &:focus {
                        color: @navbar-inverse-link-active-color;
                        background-color: @navbar-inverse-link-active-bg;
                    }
                }
                > .disabled > a {
                    &,
                    &:hover,
                    &:focus {
                        color: @navbar-inverse-link-disabled-color;
                        background-color: @navbar-inverse-link-disabled-bg;
                    }
                }
            }
        }
    }

    .navbar-link {
        color: @navbar-inverse-link-color;
        &:hover {
            color: @navbar-inverse-link-hover-color;
        }
    }

    .btn-link {
        color: @navbar-inverse-link-color;
        &:hover,
        &:focus {
            color: @navbar-inverse-link-hover-color;
        }
        &[disabled],
        fieldset[disabled] & {
            &:hover,
            &:focus {
                color: @navbar-inverse-link-disabled-color;
            }
        }
    }
}