/* Background Remover — page styles.

   Chrome uses the site's theme tokens (--fg-rgb, --pure, --surface-*, --border)
   like the rest of style.css, following the glass generator's precedent: a tool
   this heavy does not belong in the 209KB stylesheet every page loads.

   The one deliberate exception is the stage: the checkerboard and the canvas
   are *content*, not chrome — they have to read as "this is transparent",
   which is a literal look, not a themed one. */

.bgr-main {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 30px 0 72px;
}

/* ── Hero ───────────────────────────────────────────────────────────────── */

.bgr-hero {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 26px;
}

.bgr-hero-copy {
    flex: 1 1 auto;
    max-width: 620px;
}

.bgr-group-label,
.bgr-samples-label {
    margin: 0;
    color: rgba(var(--fg-rgb), 0.48);
    font-size: 0.72rem;
    font-weight: 400;
    letter-spacing: 0;
    text-transform: uppercase;
}

.bgr-hero-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.bgr-export {
    min-width: 132px;
}

/* ── Dropzone ───────────────────────────────────────────────────────────── */

.bgr-dropzone {
    padding: 52px 32px 34px;
    border: 1px dashed var(--border-strong);
    border-radius: var(--radius-lg);
    background: var(--panel);
    text-align: center;
    transition: border-color 0.18s ease, background 0.18s ease;
}

.bgr-dropzone.is-dragging {
    border-color: rgba(var(--fg-rgb), 0.5);
    background: var(--panel-strong);
}

.bgr-main[data-phase="loading"] .bgr-dropzone,
.bgr-main[data-phase="working"] .bgr-dropzone,
.bgr-main[data-phase="ready"] .bgr-dropzone {
    display: none;
}

.bgr-drop-icon {
    color: rgba(var(--fg-rgb), 0.42);
}

.bgr-drop-title {
    margin: 14px 0 8px;
    color: var(--pure);
    font-family: "Geist", "Inter", sans-serif;
    font-size: 1.32rem;
    font-weight: 400;
    letter-spacing: -0.02em;
}

.bgr-drop-copy {
    margin: 0 0 10px;
    color: rgba(var(--fg-rgb), 0.62);
    font-size: 0.92rem;
}

.bgr-drop-meta {
    margin: 0;
    color: rgba(var(--fg-rgb), 0.38);
    font-size: 0.78rem;
}

.bgr-link-button {
    padding: 0;
    border: 0;
    border-bottom: 1px solid rgba(var(--fg-rgb), 0.4);
    background: none;
    color: var(--pure);
    font: inherit;
    cursor: pointer;
}

.bgr-link-button:hover {
    border-bottom-color: var(--pure);
}

kbd {
    padding: 2px 6px;
    border: 1px solid var(--border-strong);
    border-radius: 6px;
    background: rgba(var(--fg-rgb), 0.05);
    font-family: "Geist Mono", ui-monospace, monospace;
    font-size: 0.74em;
}

/* ── Samples ────────────────────────────────────────────────────────────── */

.bgr-samples {
    margin-top: 32px;
    padding-top: 26px;
    border-top: 1px solid var(--border);
}

.bgr-samples-label {
    margin-bottom: 14px;
}

.bgr-samples-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 14px;
}

.bgr-sample {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 0;
    border: 0;
    background: none;
    color: rgba(var(--fg-rgb), 0.6);
    font-size: 0.76rem;
    cursor: pointer;
}

.bgr-sample img {
    width: 92px;
    height: 92px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    object-fit: cover;
    transition: border-color 0.18s ease, transform 0.18s ease;
}

.bgr-sample:hover img {
    border-color: rgba(var(--fg-rgb), 0.42);
    transform: translateY(-2px);
}

.bgr-sample:hover {
    color: var(--pure);
}

/* ── Workspace ──────────────────────────────────────────────────────────── */

/* An author `display` beats the UA's [hidden] rule, so the attribute needs
   saying again here — without this the empty workspace renders on page load. */
.bgr-workspace[hidden],
.bgr-row[hidden],
.bgr-status[hidden] {
    display: none;
}

.bgr-workspace {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 316px;
    gap: 20px;
    align-items: start;
}

.bgr-stage {
    position: relative;
    min-height: 460px;
    height: clamp(460px, 62vh, 760px);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: var(--surface-1);
    overflow: hidden;
}

.bgr-stage canvas {
    display: block;
    width: 100%;
    height: 100%;
    touch-action: none;
    cursor: default;
}

.bgr-main[data-phase="ready"] .bgr-stage canvas {
    cursor: crosshair;
}

.bgr-main[data-phase="loading"] .bgr-stage canvas,
.bgr-main[data-phase="working"] .bgr-stage canvas {
    cursor: progress;
    opacity: 0.45;
}

/* ── Comparison slider ──────────────────────────────────────────────────

   The handle is a real focusable element sitting over the canvas, so it can be
   tabbed to and nudged with the arrow keys. Everything else in the layer is
   pointer-transparent, or it would swallow brush strokes. */

.bgr-split {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.bgr-split[hidden] {
    display: none;
}

.bgr-split-handle {
    position: absolute;
    display: flex;
    width: 44px;
    align-items: center;
    justify-content: center;
    transform: translateX(-50%);
    cursor: ew-resize;
    pointer-events: auto;
    touch-action: none;
}

.bgr-split-grip {
    display: grid;
    width: 34px;
    height: 34px;
    place-items: center;
    border: 1px solid rgba(var(--fg-rgb), 0.55);
    border-radius: 50%;
    background: rgba(10, 10, 10, 0.82);
    color: var(--pure);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.45);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: transform 0.15s ease, border-color 0.15s ease;
}

.bgr-split-handle:hover .bgr-split-grip,
.bgr-split.is-dragging .bgr-split-grip {
    transform: scale(1.08);
    border-color: var(--pure);
}

.bgr-split-handle:focus-visible {
    outline: none;
}

.bgr-split-handle:focus-visible .bgr-split-grip {
    outline: 2px solid var(--pure);
    outline-offset: 3px;
}

.bgr-split-label {
    position: absolute;
    top: calc(var(--split-top, 0px) + 12px);
    padding: 5px 11px;
    border-radius: 999px;
    background: rgba(10, 10, 10, 0.78);
    color: rgba(var(--fg-rgb), 0.82);
    font-size: 0.7rem;
    opacity: 0;
    transition: opacity 0.16s ease;
}

.bgr-split-label--before {
    left: calc(var(--split-left, 0px) + 12px);
}

.bgr-split-label--after {
    right: calc(var(--split-right, 0px) + 12px);
}

.bgr-split.is-open .bgr-split-label {
    opacity: 1;
}

/* ── Status overlay ─────────────────────────────────────────────────────── */

.bgr-status {
    position: absolute;
    left: 50%;
    bottom: 18px;
    width: min(420px, calc(100% - 28px));
    transform: translateX(-50%);
    padding: 16px 18px;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-md);
    background: rgba(10, 10, 10, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    text-align: left;
}

.bgr-status-title {
    margin: 0;
    color: var(--pure);
    font-size: 0.92rem;
    font-weight: 500;
}

.bgr-status-detail {
    margin: 5px 0 0;
    color: rgba(var(--fg-rgb), 0.56);
    font-size: 0.8rem;
    line-height: 1.45;
}

.bgr-status-detail:empty {
    display: none;
}

.bgr-status-bar {
    height: 4px;
    margin-top: 12px;
    border-radius: 999px;
    background: rgba(var(--fg-rgb), 0.12);
    overflow: hidden;
}

.bgr-status-fill {
    display: block;
    width: 0;
    height: 100%;
    border-radius: 999px;
    background: var(--pure);
    transition: width 0.2s ease;
}

#bgr-status-action {
    margin-top: 12px;
}

/* ── Rail ───────────────────────────────────────────────────────────────── */

.bgr-rail {
    display: flex;
    flex-direction: column;
    gap: 2px;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: var(--panel);
    overflow: hidden;
}

.bgr-group,
.bgr-actions {
    padding: 18px;
    border-bottom: 1px solid var(--border);
}

.bgr-actions {
    border-bottom: 0;
    background: rgba(var(--fg-rgb), 0.02);
}

.bgr-group-label {
    margin-bottom: 12px;
}

.bgr-row {
    margin-top: 14px;
}

/* ── Segmented buttons ──────────────────────────────────────────────────── */

.bgr-segment {
    display: grid;
    grid-auto-flow: column;
    gap: 4px;
    padding: 4px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: rgba(var(--fg-rgb), 0.03);
}

.bgr-segment button {
    padding: 8px 6px;
    border: 0;
    border-radius: 8px;
    background: none;
    color: rgba(var(--fg-rgb), 0.58);
    font-family: inherit;
    font-size: 0.78rem;
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease;
}

.bgr-segment button:hover {
    color: var(--pure);
}

.bgr-segment button.is-active {
    background: rgba(var(--fg-rgb), 0.12);
    color: var(--pure);
}

/* ── Fields ─────────────────────────────────────────────────────────────── */

.bgr-field {
    display: block;
    margin-top: 12px;
}

.bgr-field > span {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    margin-bottom: 7px;
    color: rgba(var(--fg-rgb), 0.62);
    font-size: 0.8rem;
}

.bgr-field b {
    color: var(--pure);
    font-family: "Geist Mono", ui-monospace, monospace;
    font-size: 0.78rem;
    font-weight: 400;
}

input[type="range"] {
    width: 100%;
    height: 3px;
    margin: 6px 0;
    border-radius: 999px;
    background: rgba(var(--fg-rgb), 0.16);
    appearance: none;
    -webkit-appearance: none;
    cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
    width: 14px;
    height: 14px;
    border: 0;
    border-radius: 50%;
    background: var(--pure);
    appearance: none;
    -webkit-appearance: none;
}

input[type="range"]::-moz-range-thumb {
    width: 14px;
    height: 14px;
    border: 0;
    border-radius: 50%;
    background: var(--pure);
}

input[type="range"]:focus-visible {
    outline: 2px solid rgba(var(--fg-rgb), 0.5);
    outline-offset: 4px;
}

.bgr-swatches {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 6px;
    margin-bottom: 10px;
}

.bgr-swatches button {
    aspect-ratio: 1;
    border: 1px solid var(--border-strong);
    border-radius: 7px;
    background: var(--swatch);
    cursor: pointer;
}

.bgr-swatches button:hover {
    border-color: var(--pure);
}

.bgr-colour-fields {
    display: flex;
    gap: 8px;
}

input[type="color"] {
    width: 38px;
    height: 34px;
    padding: 2px;
    border: 1px solid var(--border);
    border-radius: 9px;
    background: none;
    cursor: pointer;
}

#bgr-colour-hex {
    flex: 1 1 auto;
    min-width: 0;
    padding: 0 10px;
    border: 1px solid var(--border);
    border-radius: 9px;
    background: rgba(var(--fg-rgb), 0.03);
    color: var(--pure);
    font-family: "Geist Mono", ui-monospace, monospace;
    font-size: 0.78rem;
}

.bgr-file-field span {
    display: block;
    margin-bottom: 8px;
    color: rgba(var(--fg-rgb), 0.62);
    font-size: 0.8rem;
}

.bgr-file-field input[type="file"] {
    width: 100%;
    color: rgba(var(--fg-rgb), 0.55);
    font-size: 0.75rem;
}

.bgr-switch {
    display: flex;
    align-items: center;
    gap: 9px;
    margin-top: 14px;
    color: rgba(var(--fg-rgb), 0.72);
    font-size: 0.82rem;
    cursor: pointer;
}

.bgr-switch input {
    width: 16px;
    height: 16px;
    accent-color: var(--pure);
}

.bgr-hint {
    margin: 10px 0 0;
    color: rgba(var(--fg-rgb), 0.38);
    font-size: 0.73rem;
    line-height: 1.5;
}

.bgr-history {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-top: 12px;
}

/* ── Buttons ────────────────────────────────────────────────────────────── */

.bgr-ghost-button {
    padding: 8px 14px;
    border: 1px solid var(--border-strong);
    border-radius: 10px;
    background: rgba(10, 10, 10, 0.72);
    color: rgba(var(--fg-rgb), 0.82);
    font-family: inherit;
    font-size: 0.78rem;
    cursor: pointer;
    transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease;
}

.bgr-ghost-button:hover:not(:disabled) {
    border-color: rgba(var(--fg-rgb), 0.45);
    color: var(--pure);
}

.bgr-ghost-button.is-active {
    background: rgba(var(--fg-rgb), 0.16);
    color: var(--pure);
}

.bgr-ghost-button:disabled {
    opacity: 0.34;
    cursor: not-allowed;
}

.bgr-primary-button {
    flex: 1 1 auto;
    padding: 12px 18px;
    border: 0;
    border-radius: 12px;
    background: var(--pure);
    color: #070707;
    font-family: inherit;
    font-size: 0.88rem;
    font-weight: 500;
    cursor: pointer;
    transition: opacity 0.15s ease;
}

.bgr-primary-button:hover:not(:disabled) {
    opacity: 0.88;
}

.bgr-primary-button:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.bgr-download-row {
    display: flex;
    gap: 8px;
}

#bgr-format {
    padding: 0 10px;
    border: 1px solid var(--border-strong);
    border-radius: 12px;
    background: rgba(var(--fg-rgb), 0.04);
    color: var(--pure);
    font-family: inherit;
    font-size: 0.8rem;
    cursor: pointer;
}

.bgr-secondary-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-top: 8px;
}

/* ── Toast and live region ──────────────────────────────────────────────── */

.bgr-toast {
    position: fixed;
    left: 50%;
    bottom: 28px;
    z-index: 40;
    padding: 11px 18px;
    border: 1px solid var(--border-strong);
    border-radius: 999px;
    background: rgba(10, 10, 10, 0.94);
    color: var(--pure);
    font-size: 0.82rem;
    opacity: 0;
    transform: translate(-50%, 10px);
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.bgr-toast.is-visible {
    opacity: 1;
    transform: translate(-50%, 0);
}

.bgr-live {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    border: 0;
    clip: rect(0 0 0 0);
    clip-path: inset(50%);
    overflow: hidden;
    white-space: nowrap;
}

/* ── Narrow ─────────────────────────────────────────────────────────────── */

@media (max-width: 980px) {
    .bgr-main {
        padding: 24px 0 56px;
    }

    .bgr-workspace {
        grid-template-columns: minmax(0, 1fr);
    }

    .bgr-stage {
        height: clamp(320px, 55vh, 520px);
        min-height: 320px;
    }

    .bgr-rail {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
        gap: 0;
    }

    .bgr-group {
        border-right: 1px solid var(--border);
    }
}

@media (max-width: 640px) {
    .bgr-dropzone {
        padding: 36px 18px 26px;
    }

    .bgr-sample img {
        width: 68px;
        height: 68px;
    }

    .bgr-rail {
        grid-template-columns: minmax(0, 1fr);
    }

    .bgr-group {
        border-right: 0;
    }
}

@media (prefers-reduced-motion: reduce) {
    .bgr-sample img,
    .bgr-toast,
    .bgr-status-fill {
        transition: none;
    }
}