/* The seven-knob container lives IN-FLOW in the scaffold's top-row center zone, between the back link
   and the lava-lamp toggle, and grows open/closed in place (lava reframe §7b) — NOT a popover, drawer,
   or floating overlay. Collapsed, it has zero footprint and is fully transparent; the @Expanded flag
   (mirrored to the .is-expanded class) transitions it open by growing its width. The PRIMARY animated
   axis is horizontal width — the controls area opening between the back link and the lamp; max-height is
   a secondary axis for the wrap case. Closed state is pointer-events:none + visibility:hidden so
   collapsed knobs are not focusable or hit-testable. */
.mix-visualizer-controls-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 0.85rem 1rem;

    /* Collapsed: zero horizontal footprint, transparent, no layout space. */
    max-width: 0;
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    visibility: hidden;
    pointer-events: none;

    /* NowPlaying glass surface (§7e): translucent dark shim, soft blur, rounded, secondary-tinted
       hairline — matches the session-hero overlay family. Padding animates in with the size. */
    padding: 0;
    border-radius: 10px;
    background: rgba(13, 27, 42, 0.55);
    border: 1px solid color-mix(in srgb, var(--mud-palette-secondary) 22%, transparent);
    backdrop-filter: blur(10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);

    transition:
        max-width 0.32s cubic-bezier(0.22, 0.61, 0.36, 1),
        max-height 0.32s cubic-bezier(0.22, 0.61, 0.36, 1),
        opacity 0.24s ease,
        padding 0.32s cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* Expanded: grows horizontally in the row's flow. Wide enough to hold all seven 64px knobs (with
   captions and gaps) on one line where the row has room; on a narrower center zone the knobs flex-wrap
   to a second in-flow line and max-height absorbs the taller stack — never clipped, never floating. */
.mix-visualizer-controls-bar.is-expanded {
    max-width: 720px;
    max-height: 420px;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    padding: 0.85rem 1rem;
}

/* Narrow rows: the controls container can't sit beside the back link and lamp on one line, so it takes
   the full row width and the scaffold's flex-wrapped top row drops it to its own in-flow line below the
   back/lamp pair (§7b-responsive). Still fully in-flow — never floats, never clips. The seven knobs get
   the row's full width and wrap within it. */
@media (max-width: 959.98px) {
    .mix-visualizer-controls-bar.is-expanded {
        flex-basis: 100%;
        max-width: 100%;
        justify-content: center;
    }
}

/* One control: a RadialKnob with its Material icon caption underneath. RadialKnob has no icon slot, so
   the icon rides adjacent (§7d). Center the pair so the seven read as a tidy bar. */
.mix-visualizer-control {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.3rem;
}

/* The caption icon is a MudIcon (a Razor component), so Blazor CSS isolation does not stamp the scope
   attribute onto its element — reach it with ::deep. Tinted to the secondary accent and the
   overlay-label opacity so it matches the session-hero NowPlaying captions (§7e). */
.mix-visualizer-control ::deep .mix-visualizer-control-icon {
    color: var(--mud-palette-secondary);
    opacity: 0.78;
}