yellowjacket/frontend/index.css

*,
*::before,
*::after {
    -webkit-user-select: none;
    user-select: none;
}

html {
    height: 100%;
}

body {
    background-color: var(--yj-bg-base, black);
    color: var(--yj-text-primary, white);
    margin: 0;
    height: 100vh;
    display: grid;
    grid-template: "top-bar top-bar" 4em "sidebar main-panel" 1fr "bottom-bar bottom-bar" 4em / auto 1fr;

    /* a11y.21 (WCAG 1.4.10), measured rather than taken as filed.

       The finding's mechanism is vertical — "the 4em bars grow while
       the viewport does not, and anything that no longer fits is
       clipped with no scrollbar" — and that is not what happens. The
       middle row is `1fr`, so it absorbs the bars exactly: at 200%
       text on an 800×600 window the bars go 64px → 128px and the main
       panel goes 472px → 344px, with the footer's bottom still landing
       on 600. Nothing is clipped, and Settings stays reachable because
       the sidebar scrolls (007 phase 5).

       What is real is the other axis, which the finding does not
       mention: at 200% text the shell is 1014px wide in an 800px
       viewport, and at 320px (400% page zoom of 1280) it is 611px —
       291px of the app unreachable behind `overflow: hidden`. So the
       horizontal axis scrolls and the vertical one stays fixed, which
       is also what keeps the transport bar where a desktop player's
       transport bar belongs. At every size this app promises
       (800×600 and up, default text) there is no overflow on either
       axis and no scrollbar appears. */
    overflow-x: auto;
    overflow-y: hidden;
}



/* Above the phone breakpoint the tab bar does not exist.  It is in the
   markup unconditionally and eagerly, for the reason notification-host
   is: navigation that has to fetch a chunk before it can navigate is
   not navigation. */
@media (min-width: 600px) {
    bottom-nav {
        display: none;
    }
}

p {
    margin: 0;
    /* I want to set paragraph margins myself */
}

/* a11y.30.  Out of flow in both states, because `body` is a grid with
   named areas and an in-flow extra child is auto-placed into one of
   them — the link would silently take a row from the shell.  It is not
   `display: none`: a skip link that is not focusable is not a skip
   link. */
.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    z-index: 100;
    padding: 0.5em 1em;
    background-color: var(--yj-accent);
    color: var(--yj-accent-fg);
    font-weight: 600;
    text-decoration: none;
    border-radius: 0 0 4px 0;
}

.skip-link:focus {
    left: 0;
}

/* The target of that link, so it can take focus at all. `main` is not
   focusable by default, and a fragment link to an unfocusable element
   moves the scroll and leaves the tab sequence exactly where it was —
   which is the whole thing the link exists to change. */
.main-panel:focus {
    outline: none;
}

.top-bar {
    grid-area: top-bar;
    height: 100%;
    padding-left: 2em;
    padding-right: 2em;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--yj-bg-elevated, #343a40);
    gap: 1em;
}

.top-bar search-bar {
    flex: 0 1 320px;
}

/* What the bar gives up when it does not fit is decided by measuring
   it (`services/top-bar-fit.ts`, #143). Two rules here are what make
   that measurement mean anything.

   **Nothing but the search box may shrink.** `scrollWidth` reports a
   perfect fit while a child quietly truncates -- #69's trap, one
   component over -- and the indicator's label is `text-overflow:
   ellipsis`, so it would have absorbed the deficit and hidden it. The
   search box is exempt because it shrinks between its 320px basis and
   the 200px floor its own stylesheet sets, and a narrower input hides
   nothing it was showing. */
.top-bar hgroup,
.top-bar library-filter,
.top-bar job-indicator {
    flex-shrink: 0;
}

/* **The wordmark yields its width, not its existence.** It is the
   app's top-level heading as well as its brand, and `display: none`
   would take a document from one `h1` to none at exactly the widths
   where the view's own header is the only thing left saying where you
   are. This is `styles/sr-only.css.ts`'s recipe, written out because
   that one is a `CSSResult` for shadow roots and this is the light
   DOM. */
.top-bar hgroup.yj-collapsed {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
    border: 0;
}

/* The bar is `justify-content: space-between`, which with four children
   spreads them evenly and left back/forward floating in the middle of
   nothing. Collecting the free space *after* this one puts the pair
   beside the brand, where a browser keeps them, and leaves the
   right-hand group exactly as it was. */
.top-bar nav-history {
    margin-right: auto;
}

ul {
    list-style-type: none;
}

.title {
    font-size: 1.5em;
    /* Both margins, not just the bottom one. The pair is flex-centred
       in a 4em bar and the UA gives an h1 a 0.67em top margin, so the
       hgroup measured 67px inside 64 and the subtitle's descenders were
       clipped by the bar. That was pre-existing; a11y.29 made it
       visible by taking the h3's bottom margin away with it, which
       shortened the block and moved the whole pair down into the clip.
       This is the state that fix landed in. */
    margin-block: 0;
}

  .subtitle {
    font-size: 0.8em;
    margin-top: 0;
  }

/* The same breakpoint the sidebar collapses at (AUTO_COLLAPSE_VIEWPORT
   in app-sidebar.ts).  The subtitle wrapped to two lines below ~780 px,
   which made the title block 98 px tall inside a 4em bar and pushed it
   down into the nav (H-11). */
@media (max-width: 899px) {
    .subtitle {
        display: none;
    }

    /* Back/forward is Desktop-band chrome (#6), and 900 is the same
       line the sidebar's labels and the subtitle are already given up
       at -- below it the shell is narrow enough that the header is
       what runs out of room first. Measured at 600, the bottom of the
       Compact band: the bar is 611px inside a 600px viewport *before*
       this component exists (filed separately), and 695px with it, so
       keeping it here would be widening a violation of the promise
       that nothing scrolls sideways at a supported size.

       Nothing is unreachable as a result, which is the rule that
       decides it: Alt+Left / Alt+Right are global and every width has
       them, the detail views keep their own back buttons, and the
       phone additionally has the platform's gesture. */
    .top-bar nav-history {
        display: none;
    }
}

body div.sidebar {
    grid-area: sidebar;
    background-color: var(--yj-bg-surface, #212529);
    overflow: hidden;
    contain: layout style paint;
}



.bottom-bar {
    grid-area: bottom-bar;
    padding: 0.25em;
    background-color: var(--yj-bg-elevated, #343a40);
    display: grid;
    grid-template-columns: var(--now-playing-width, 320px) 1fr auto;
    align-items: center;
    contain: layout style;

    #now-playing-info {
        justify-self: start;
        display: flex;
        min-width: 0;
        overflow: hidden;

        #album-art {
            width: 3.5em;
            min-width: 3.5em;
            height: 3.5em;
            min-height: 3.5em;
            border-radius: 0.25em;
            background-color: var(--yj-accent, #ffd43b);
        }

        #track-info {
            display: flex;
            margin-left: 1em;
            flex-direction: column;
            font-size: 0.75em;
            justify-content: center;
            text-wrap-mode: nowrap;
            overflow: hidden;

            p {
                overflow: hidden;
                text-overflow: ellipsis;
            }
        }
    }

    now-playing {
        overflow: hidden;
    }

    audio-player {
        margin: 0.5em 1em;
    }

    #queue-button {
        justify-self: end;
        background: none;
        border: none;
        color: inherit;
        cursor: pointer;
        padding: 8px;
        display: flex;
        align-items: center;
    }

    #queue-button:hover {
        color: var(--yj-accent, #ffd43b);
    }

    /* An open queue is a state this button can be in, and it used to
       look exactly like the closed one -- so the only way to tell what
       pressing it would do was to look at the other side of the window
       and infer it. `aria-expanded` is the same fact for anyone not
       looking at all, and it points at the panel it controls. */
    #queue-button[aria-expanded='true'] {
        color: var(--yj-accent, #ffd43b);
        background: var(--yj-bg-overlay, #404040);
        border-radius: 4px;
    }

    #queue-button.drag-over {
        color: var(--yj-accent, #ffd43b);
        outline: 2px dashed var(--yj-accent, #ffd43b);
        outline-offset: -2px;
        border-radius: 4px;
    }
}

.content-area {
    grid-area: main-panel;
    display: flex;
    overflow: hidden;
    contain: layout style;

    /* The containing block for the queue panel's overlay mode (plan
       018, #24), which spans this box rather than taking width from
       the main panel beside it. `contain: layout` already establishes
       one; this says so on purpose, so that removing the containment
       for a paint reason does not silently reparent the overlay to the
       viewport. */
    position: relative;
}

.main-panel {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    background-color: var(--yj-bg-surface, #212529);
    overflow: hidden;
    contain: layout style paint;
}

.main-panel > * {
    flex: 1;
    min-height: 0;
    box-sizing: border-box;
    contain: layout style paint;
}

/* Hidden cached views: use visibility+size collapse instead of
   display:none so scroll containers preserve their scrollTop.
   display:none discards scroll state in WebKitGTK. */
.main-panel > .view-hidden {
    visibility: hidden !important;
    flex: 0 0 0px !important;
    min-height: 0 !important;
    max-height: 0 !important;
    height: 0 !important;
    padding: 0 !important;
    margin: 0 !important;
    border: none !important;
    overflow: hidden !important;
    pointer-events: none !important;
    contain: strict !important;
}


/* ===================================================================
   The phone shell (plan 016 B2).

   **This section is last on purpose.** A media query adds no
   specificity, so `@media (max-width: 599px) { .title { … } }` placed
   above the plain `.title` rule loses to it -- which is exactly what
   happened when this landed in the middle of the file: the header kept
   its 2em gutters, its 16px gap and its 24px title on a 390px phone,
   and every one of these declarations was dead. Nothing failed,
   because the shell fits for a different reason (the `min-width: 0`
   below and each component's own media query), so a screenshot was
   what caught it.

   600px, not the sidebar's 900: 900 is a *laptop* and the response to
   it is a narrower sidebar, which is still a sidebar. Below 600 there
   is no room for one at all -- 360px of viewport over a 200px nav is
   not a layout -- so the navigation moves to the bottom, where a thumb
   is, and the eleven-item list moves into `bottom-nav`'s drawer.
   =================================================================== */
@media (max-width: 599px) {
    body {
        grid-template:
            "top-bar" 3.25em
            "main-panel" 1fr
            "bottom-bar" auto
            "bottom-nav" auto
            / 1fr;
        /* Nothing may scroll sideways here.  On a desktop the shell is
           allowed to overflow a zoomed-in window (a11y.21 above); a
           phone *is* the small viewport, so the shell has to fit it. */
        overflow-x: hidden;
    }

    body div.sidebar {
        display: none;
    }

    bottom-nav {
        grid-area: bottom-nav;
    }

    /* The 2em gutters are half a thumb each at this width, and the
       subtitle is already gone from 900 down.

       `min-width: 0` is the load-bearing half. A grid item's implicit
       minimum is `auto` -- its content -- so a header whose children
       ask for 580px makes the *body* 580px wide inside a 360px
       viewport, and `overflow-x: hidden` then hides the right-hand
       third of the app rather than fitting it. Every box between the
       viewport and the content that must shrink needs this. */
    .top-bar {
        padding-left: 0.75em;
        padding-right: 0.75em;
        gap: 0.5em;
        min-width: 0;
        overflow: hidden;
    }

    .content-area,
    .main-panel,
    .bottom-bar {
        min-width: 0;
    }

    .title {
        font-size: 1.1em;
    }

    /* The search box is the one header control worth its width; the
       library filter is a rarely-changed setting and reachable from
       the drawer's Settings.

       `nav-history` is already gone from 899 down. It would belong
       here anyway and for a stronger reason than width: the phone has
       Back as a gesture or a button the OS owns, and this app hooks it
       (`popstate`), so a second Back in the chrome duplicates a
       control the platform provides. */
    .top-bar library-filter {
        display: none;
    }

    /* The full-screen now-playing view *is* the transport, so the bar
       repeating it underneath is 4em of a small screen spent saying
       the same thing twice -- visible in a screenshot, invisible to
       every assertion about either one.

       `:has()` rather than a class toggled from index.ts: which view
       is showing is already published as an attribute, and a second
       expression of the same fact is a second thing to keep in step.
       The view carries its own queue button, because this is where
       that one lived. */
    body:has(#main-content[data-active-view="now-playing"]) .bottom-bar {
        display: none;
    }

    .top-bar search-bar {
        flex: 1 1 auto;
        min-width: 0;
    }
}

@media (max-width: 599px) {
    .bottom-bar {
        grid-template-columns: minmax(0, 1fr) auto auto;
        gap: 0.25em;
    }

    .bottom-bar audio-player {
        margin: 0.25em;
    }
}