GitHub adaptive content by vednoc

/* ==UserStyle==
@name         GitHub adaptive content
@namespace    userstyles.world/user/vednoc
@description  Adaptive header/nav/body content for GitHub.
@author       vednoc <vednoc@pm.me> (https://github.com/vednoc)
@version      0.3.0
@license      MIT
@preprocessor stylus

@var checkbox shortNav 'Enable short navbar style' 1
@var checkbox altNav 'Enable alternative navbar style' 0
==/UserStyle== */

t = transparent
i = !important

$reset = @block {
    margin-inline: auto
    max-width: calc(1280px - 32px)
}

$resetFull = @block {
    padding-inline: 0 i
    margin-inline: auto
    max-width: calc(1280px - 32px)
}

@-moz-document domain('github.com') {
    @media (min-width: 768px) {
        body:not(.full-width):not(.notifications-v2):not(.height-full) {
            // Navbar.
            .js-header-wrapper {
                padding-inline: 1rem if shortNav
                background-color: var(--color-header-bg) unless altNav

                if altNav {
                    --color-header-text: var(--color-fg-muted)
                    --color-header-logo: var(--color-fg-default)
                    --color-header-bg: var(--color-canvas-default)
                    --color-header-search-bg: var(--color-canvas-inset)
                    --color-header-search-border: var(--color-border-default)
                    ::placeholder { color: var(--color-fg-muted) }
                }

                // Logged in/out headers.
                > .Header, > .Header-old {
                    { $resetFull } if shortNav
                    background: none
                    border-bottom: 1px solid var(--color-border-muted) if altNav
                }

                // Fixes discrepancies in different places.
                > .Header-old > [class*='container-'] {
                    { $resetFull } if shortNav
                }
            }

            // Repository page header.
            #repository-container-header.hide-full-screen {
                padding-inline: 1rem

                // Hide header background on light themes.
                &[style*='page-header-bg'] { background: none i }

                > div, > nav {
                    { $resetFull }
                }
            }

            // Alerts of various kinds.
            #js-flash-container > div > div,
            #notification-shelf > div,
            // Sponsors alerts.
            x-banner,
            x-banner + div[style],
            // Issues dashboard page.
            #issues_dashboard.container-lg,
            // Actions page. @upstream
            split-page-layout,
            // Footer width.
            footer.width-full {
                { $resetFull }
            }

            // Remove extra space. @upstream
            button.js-flash-close > svg { margin-right: 0 }

            // Organization page header.
            .pagehead.orghead {
                padding-inline:  1rem

                // Content.
                .container-lg,
                .container-xl,
                // Navigation.
                nav ul, nav {
                    { $resetFull }
                }

                // Tab content.
                + .container-lg {
                    max-width: unset

                    > div {
                        { $resetFull }
                    }
                }
            }

            // Main content.
            main {
                // More consistent padding.
                .px-lg-5, .px-md-4 { padding-inline: 1rem i }

                // Tabbed navigation on profile page.
                .position-sticky > .container-xl { padding-inline: 0 i }
            }
        }
    }
}

@-moz-document regexp('https?://github.com/sponsors/.+') {
    main > div {
        // Alerts.
        &:not(.container-lg) {
            > .container-lg {
                { $resetFull }
            }

            // Add padding to "sponsors matching fund" bar.
            &.flash + [style] { padding-inline: 1rem }
        }

        // Page content.
        &.container-lg {
            padding-inline: 1rem
            max-width: 1280px
        }
    }
}

@-moz-document regexp('https?://github.com/.+/.+/(releases|tags)$') {
    main {
        .col-11 { width: 100% }
        .col-md-9 { width: 83.3333333% }
    }
}