// This file contains the styles for the overall layouting of the documentation
// skeleton, including the responsive changes as well as sidebar toggles.
//
// This is implemented as a mobile-last design, which isn't ideal, but it is
// reasonably good-enough and I got pretty tired by the time I'd finished this
// to move the rules around to fix this. Shouldn't take more than 3-4 hours,
// if you know what you're doing tho.

//
// Overalls
//
body
  overflow-y: scroll // always have the scrollbar
html,
body
  height: 100%

.page
  display: flex
  // fill the viewport for pages with little content.
  min-height: 100%

.mobile-header
  width: 100%
  height: var(--header-height)
  background-color: var(--color-header-background)
  color: var(--color-header-text)
  border-bottom: 1px solid var(--color-header-border)

  // Looks like sub-script/super-script have this, and we need this to
  // be "on top" of those.
  z-index: 10

  // Add shadow when scrolled
  &.scrolled
    border-bottom: none
    box-shadow: 0 0 0.2rem rgba(0, 0, 0, 0.1), 0 0.2rem 0.4rem rgba(0, 0, 0, 0.2)

  // We don't show the header on large screens.
  display: none

.main
  display: flex
  flex: 1

// Sidebar (left) also covers the entire left portion of screen.
.sidebar-drawer
  box-sizing: border-box

  display: flex
  justify-content: flex-end
  // These next two lines took me two days to figure out.
  width: calc((100% - #{$full-width}) / 2 + #{$sidebar-width})
  min-width: $sidebar-width

// Scroll-along sidebars
.sidebar-container,
.toc-drawer
  width: $sidebar-width

.sidebar-sticky,
.toc-sticky
  position: sticky
  top: 0
  height: 100vh
  height: min(100%, 100vh)

  display: flex
  flex-direction: column

.sidebar-scroll,
.toc-scroll
  flex-shrink: 1

  overflow: auto
  scroll-behavior: smooth

// Central items.
.content
  padding: 0 $content-padding
  width: $content-width

  display: flex
  flex-direction: column
  justify-content: space-between

.icon
  display: inline-block
  height: 1rem
  width: 1rem
  svg
    width: 100%
    height: 100%

// TODO: figure out what could cause content to flow "out" of .content and
//       add an overflow-x on it.

//
// Accommodate announcement banner
//
.announcement
  height: var(--header-height)
  display: flex
  align-items: center
  overflow-x: auto
  & + .page
    min-height: calc(100% - var(--header-height))

.announcement-content
  box-sizing: border-box
  padding: 0.5rem
  min-width: 100%
  white-space: nowrap
  text-align: center

////////////////////////////////////////////////////////////////////////////////
// Toggles for elements
////////////////////////////////////////////////////////////////////////////////
.toc-overlay-icon, .nav-overlay-icon
  display: none
  cursor: pointer

  .icon
    color: var(--color-foreground-secondary)
    height: 1.25rem
    width: 1.25rem

.toc-header-icon, .nav-overlay-icon
  // for when we set display: flex
  justify-content: center
  align-items: center

.toc-content-icon
  height: 1.5rem
  width: 1.5rem
  margin-top: 1.5rem
  float: right

.sidebar-toggle
  position: absolute
  display: none
// <debugging things>
.sidebar-toggle[name="__toc"]
  left: 20px
.sidebar-toggle:checked
  left: 40px
// </debugging things>

.overlay
  position: fixed
  top: 0
  width: 0
  height: 0

  transition: width 0ms, height 0ms, opacity 250ms ease-out

  opacity: 0
  background-color: rgba(0, 0, 0, 0.54)
.sidebar-overlay
  z-index: 20
.toc-overlay
  z-index: 40

// Keep things on top and smooth.
.sidebar-drawer
  z-index: 30
  transition: left 250ms ease-in-out
.toc-drawer
  z-index: 50
  transition: right 250ms ease-in-out

// Show the Sidebar
#__navigation:checked
  & ~ .sidebar-overlay
    width: 100%
    height: 100%
    opacity: 1
  & ~ .page
    .sidebar-drawer
      top: 0
      left: 0
      // Show the toc sidebar
#__toc:checked
  & ~ .toc-overlay
    width: 100%
    height: 100%
    opacity: 1
  & ~ .page
    .toc-drawer
      top: 0
      right: 0

////////////////////////////////////////////////////////////////////////////////
// Responsive layouting
////////////////////////////////////////////////////////////////////////////////
// Make things a bit bigger on bigger screens.
@media (min-width: $full-width + $sidebar-width)
  html
    font-size: 110%

@media (max-width: $full-width)
  // Collapse "toc" into the icon.
  .toc-content-icon
    display: flex
  .toc-drawer
    position: fixed
    height: 100vh
    top: 0
    right: -$sidebar-width
    border-left: 1px solid var(--color-background-muted)
  .toc-tree
    border-left: none
    font-size: var(--toc-font-size--mobile)

  // Accomodate for a changed content width.
  .sidebar-drawer
    width: calc((100% - #{$full-width - $sidebar-width}) / 2 + #{$sidebar-width})

@media (max-width: $full-width - $sidebar-width)
  // Collapse "navigation".
  .nav-overlay-icon
    display: flex
  .sidebar-drawer
    position: fixed
    height: 100vh
    width: $sidebar-width

    top: 0
    left: -$sidebar-width

  // Swap which toc icon is used.
  .toc-header-icon
    display: flex
  .toc-content-icon
    display: none

  // Show the header.
  .mobile-header
    position: sticky
    top: 0
    display: flex
    justify-content: space-between
    align-items: center

    .header-left,
    .header-right
      display: flex
      height: var(--header-height)
      width: var(--header-height)
      label
        height: 100%
        width: 100%

  // Add a scroll margin for the content
  :target
    scroll-margin-top: var(--header-height)

  // Center the page, and accommodate for the header.
  .page
    flex-direction: column
    justify-content: center
  .content
    margin-left: auto
    margin-right: auto

@media (max-width: $content-width + 2* $content-padding)
  // Content should respect window limits.
  .content
    width: 100%
    overflow-x: auto

@media (max-width: $content-width)
  .content
    padding: 0 $content-padding--small
    // Don't float sidebars to the right.
  article div.sidebar
    float: none
    width: 100%
    margin: 1rem 0
