/* ================================================
   BgRemover.css — Página dedicada Quitar Fondo
   ================================================ */

/* ── Variables ────────────────────────── */
:root {
    --bgr-primary: #0ea5e9;
    --bgr-primary-dark: #0284c7;
    --bgr-gradient: linear-gradient(135deg, #0ea5e9, #6366f1);
    --bgr-surface: #ffffff;
    --bgr-surface-alt: #f8fafc;
    --bgr-border: #e2e8f0;
    --bgr-radius: 16px;
    --bgr-shadow: 0 4px 24px rgba(0,0,0,.06);
    --bgr-shadow-lg: 0 12px 40px rgba(0,0,0,.1);
}

/* ── Hero ────────────────────────────── */
.bgr-hero {
    text-align: center;
    padding: 2.5rem 0 1.5rem;
}
.bgr-hero-icon {
    width: 72px; height: 72px;
    border-radius: 50%;
    background: var(--bgr-gradient);
    display: inline-flex; align-items: center; justify-content: center;
    color: #fff; font-size: 1.8rem;
    margin-bottom: 1rem;
    box-shadow: 0 8px 24px rgba(14,165,233,.3);
}
.bgr-hero h1 {
    font-size: 1.75rem; font-weight: 800;
    background: var(--bgr-gradient);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}
.bgr-hero p { color: #64748b; max-width: 520px; margin: .5rem auto 0; }

/* ── Drop Zone ──────────────────────── */
.bgr-dropzone {
    border: 2.5px dashed var(--bgr-border);
    border-radius: var(--bgr-radius);
    padding: 3rem 2rem;
    text-align: center;
    background: var(--bgr-surface-alt);
    transition: all .3s ease;
    cursor: pointer;
    position: relative;
}
.bgr-dropzone:hover, .bgr-dropzone.dragover {
    border-color: var(--bgr-primary);
    background: rgba(14,165,233,.04);
    box-shadow: 0 0 0 4px rgba(14,165,233,.08);
}
.bgr-dropzone-icon {
    font-size: 3rem;
    color: var(--bgr-primary);
    margin-bottom: 1rem;
    opacity: .7;
}
.bgr-dropzone h3 { font-size: 1.1rem; font-weight: 700; color: #1e293b; }
.bgr-dropzone p { font-size: .85rem; color: #94a3b8; margin: .25rem 0 1rem; }
.bgr-dropzone input[type="file"] {
    position: absolute; inset: 0; opacity: 0; cursor: pointer;
}
.bgr-btn-select {
    display: inline-flex; align-items: center; gap: 8px;
    padding: .6rem 1.5rem;
    border-radius: 50px;
    border: 2px solid var(--bgr-primary);
    background: transparent;
    color: var(--bgr-primary);
    font-weight: 700;
    font-size: .9rem;
    transition: all .25s ease;
}
.bgr-btn-select:hover {
    background: var(--bgr-primary); color: #fff;
}

/* ── Preview / Result Area ──────────── */
.bgr-workspace {
    background: var(--bgr-surface);
    border-radius: var(--bgr-radius);
    box-shadow: var(--bgr-shadow);
    padding: 1.5rem;
    margin-top: 1.5rem;
}
.bgr-preview-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    align-items: start;
}
@media (max-width: 768px) {
    .bgr-preview-grid { grid-template-columns: 1fr; }
}
.bgr-preview-card {
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--bgr-border);
    position: relative;
}
.bgr-preview-card-label {
    position: absolute; top: 12px; left: 12px; z-index: 2;
    padding: 4px 12px; border-radius: 50px;
    font-size: .7rem; font-weight: 700;
    text-transform: uppercase; letter-spacing: .05em;
    backdrop-filter: blur(8px);
}
.bgr-label-original {
    background: rgba(100,116,139,.85); color: #fff;
}
.bgr-label-result {
    background: rgba(14,165,233,.85); color: #fff;
}
.bgr-preview-card img {
    width: 100%; display: block;
    object-fit: contain;
    max-height: 420px;
}
/* Tablero de ajedrez para transparencia */
.bgr-checkerboard {
    background-image:
        linear-gradient(45deg, #e2e8f0 25%, transparent 25%),
        linear-gradient(-45deg, #e2e8f0 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #e2e8f0 75%),
        linear-gradient(-45deg, transparent 75%, #e2e8f0 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
    background-color: #fff;
}

/* ── Processing state ──────────────── */
.bgr-processing {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 2rem;
    text-align: center;
}
.bgr-processing-spinner {
    width: 56px; height: 56px;
    border: 4px solid rgba(14,165,233,.15);
    border-top-color: var(--bgr-primary);
    border-radius: 50%;
    animation: bgr-spin 0.8s linear infinite;
}
@keyframes bgr-spin { to { transform: rotate(360deg); } }
.bgr-processing h4 { margin-top: 1.25rem; font-weight: 700; color: #1e293b; }
.bgr-processing p { color: #94a3b8; font-size: .85rem; }

/* ── Progress bar ──────────────────── */
.bgr-progress-wrap {
    width: 100%; max-width: 320px;
    margin-top: 1rem;
}
.bgr-progress-bar {
    height: 6px; border-radius: 3px;
    background: #e2e8f0; overflow: hidden;
}
.bgr-progress-fill {
    height: 100%; border-radius: 3px;
    background: var(--bgr-gradient);
    transition: width .3s ease;
}
.bgr-progress-text {
    font-size: .75rem; color: #94a3b8;
    margin-top: .35rem; text-align: center;
}

/* ── Action buttons ────────────────── */
.bgr-actions {
    display: flex; flex-wrap: wrap; gap: .75rem;
    justify-content: center;
    margin-top: 1.5rem;
}
.bgr-btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: .65rem 1.5rem;
    border-radius: 50px;
    font-weight: 700; font-size: .85rem;
    border: none; cursor: pointer;
    transition: all .25s ease;
}
.bgr-btn-primary {
    background: var(--bgr-gradient); color: #fff;
    box-shadow: 0 4px 16px rgba(14,165,233,.3);
}
.bgr-btn-primary:hover {
    box-shadow: 0 6px 24px rgba(14,165,233,.45);
    transform: translateY(-1px);
}
.bgr-btn-outline {
    background: transparent;
    border: 2px solid var(--bgr-border); color: #475569;
}
.bgr-btn-outline:hover {
    border-color: var(--bgr-primary); color: var(--bgr-primary);
}
.bgr-btn-success {
    background: linear-gradient(135deg, #10b981, #059669); color: #fff;
    box-shadow: 0 4px 16px rgba(16,185,129,.3);
}
.bgr-btn-success:hover {
    box-shadow: 0 6px 24px rgba(16,185,129,.45);
    transform: translateY(-1px);
}

/* ── Tips ───────────────────────────── */
.bgr-tips {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 2rem;
}
.bgr-tip {
    background: var(--bgr-surface);
    border: 1px solid var(--bgr-border);
    border-radius: 12px;
    padding: 1.25rem;
    text-align: center;
    transition: all .25s ease;
}
.bgr-tip:hover {
    border-color: var(--bgr-primary);
    box-shadow: 0 4px 16px rgba(14,165,233,.08);
}
.bgr-tip-icon {
    width: 44px; height: 44px;
    border-radius: 12px;
    background: rgba(14,165,233,.08);
    display: inline-flex; align-items: center; justify-content: center;
    font-size: 1.2rem; color: var(--bgr-primary);
    margin-bottom: .75rem;
}
.bgr-tip h6 { font-weight: 700; font-size: .85rem; color: #1e293b; margin-bottom: .25rem; }
.bgr-tip p { font-size: .75rem; color: #94a3b8; margin: 0; }

/* ── Editor Toolbar ────────────────── */
.bgr-toolbar {
    display: flex;
    align-items: center;
    gap: .5rem;
    padding: .75rem 1rem;
    background: #1e293b;
    border-radius: 14px;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    box-shadow: 0 4px 20px rgba(0,0,0,.15);
}
.bgr-toolbar-group {
    display: flex;
    align-items: center;
    gap: .35rem;
}
.bgr-toolbar-sep {
    width: 1px;
    height: 28px;
    background: rgba(255,255,255,.12);
    margin: 0 .35rem;
}
.bgr-tool-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: .5rem .85rem;
    border-radius: 10px;
    border: none;
    background: rgba(255,255,255,.06);
    color: #94a3b8;
    font-weight: 600;
    font-size: .78rem;
    cursor: pointer;
    transition: all .2s ease;
    white-space: nowrap;
}
.bgr-tool-btn:hover {
    background: rgba(255,255,255,.12);
    color: #e2e8f0;
}
.bgr-tool-btn.active {
    background: var(--bgr-primary);
    color: #fff;
    box-shadow: 0 2px 10px rgba(14,165,233,.4);
}
.bgr-tool-btn i { font-size: .9rem; }

/* Brush size slider */
.bgr-brush-slider {
    display: flex;
    align-items: center;
    gap: .5rem;
}
.bgr-brush-slider input[type="range"] {
    width: 80px;
    accent-color: var(--bgr-primary);
    height: 4px;
}
.bgr-brush-size-label {
    color: #94a3b8;
    font-size: .7rem;
    font-weight: 600;
    min-width: 28px;
    text-align: center;
}

/* ── Canvas Editor ─────────────────── */
.bgr-editor-layout {
    display: grid;
    grid-template-columns: 180px 1fr;
    gap: 1rem;
    align-items: start;
}
@media (max-width: 768px) {
    .bgr-editor-layout { grid-template-columns: 1fr; }
}
.bgr-canvas-wrap {
    position: relative;
    border-radius: 12px;
    border: 1px solid var(--bgr-border);
    height: 520px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bgr-surface-alt);
    overflow: auto; /* Permite scroll cuando hacemos zoom */
}
@media (max-width: 768px) {
    .bgr-canvas-wrap { height: 450px; }
}
.bgr-canvas-wrap canvas {
    display: block;
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    cursor: none;
    /* Tablero de ajedrez en el canvas mismo para que no ocupe orillas vacías */
    background-image:
        linear-gradient(45deg, #e2e8f0 25%, transparent 25%),
        linear-gradient(-45deg, #e2e8f0 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #e2e8f0 75%),
        linear-gradient(-45deg, transparent 75%, #e2e8f0 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
    background-color: #fff;
    box-shadow: 0 0 16px rgba(0,0,0,.05);
}
.bgr-canvas-label {
    position: absolute; top: 10px; left: 10px; z-index: 2;
    padding: 4px 12px; border-radius: 50px;
    font-size: .65rem; font-weight: 700;
    text-transform: uppercase; letter-spacing: .05em;
    background: rgba(14,165,233,.85); color: #fff;
    backdrop-filter: blur(8px);
}

/* Cursor de pincel (círculo visual) */
.bgr-brush-cursor {
    position: fixed;
    border: 2px solid rgba(14,165,233,.7);
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    display: none;
    mix-blend-mode: difference;
    transition: width .1s, height .1s;
}

/* ── Original preview (sidebar) ────── */
.bgr-original-preview {
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--bgr-border);
    position: relative;
    background: var(--bgr-surface-alt);
    display: flex;
    align-items: center;
    justify-content: center;
}
.bgr-original-preview img {
    width: 100%;
    display: block;
    object-fit: contain;
    max-height: 520px;
}
.bgr-original-preview-label {
    position: absolute; top: 8px; left: 8px; z-index: 2;
    padding: 3px 10px; border-radius: 50px;
    font-size: .6rem; font-weight: 700;
    text-transform: uppercase; letter-spacing: .04em;
    background: rgba(100,116,139,.85); color: #fff;
    backdrop-filter: blur(8px);
}

/* ── Color Background Panel ────────── */
.bgr-color-panel {
    display: flex;
    align-items: center;
    gap: .5rem;
    flex-wrap: wrap;
}
.bgr-color-swatch {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    border: 2px solid rgba(255,255,255,.15);
    cursor: pointer;
    transition: all .2s ease;
    padding: 0;
}
.bgr-color-swatch:hover {
    transform: scale(1.15);
    border-color: rgba(255,255,255,.5);
}
.bgr-color-swatch.active-color {
    border-color: var(--bgr-primary);
    box-shadow: 0 0 0 2px var(--bgr-primary);
}
.bgr-color-swatch-transparent {
    background-image:
        linear-gradient(45deg, #ccc 25%, transparent 25%),
        linear-gradient(-45deg, #ccc 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #ccc 75%),
        linear-gradient(-45deg, transparent 75%, #ccc 75%);
    background-size: 8px 8px;
    background-position: 0 0, 0 4px, 4px -4px, -4px 0px;
    background-color: #fff;
}
.bgr-color-picker-wrap {
    position: relative;
    width: 28px;
    height: 28px;
}
.bgr-color-picker-wrap .bgr-color-picker-icon {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .65rem;
    color: #fff;
    text-shadow: 0 1px 3px rgba(0,0,0,.5);
    pointer-events: none;
    z-index: 1;
}
.bgr-color-input {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    border: 2px solid rgba(255,255,255,.15);
    cursor: pointer;
    padding: 0;
    background: none;
    position: relative;
}
.bgr-color-input::-webkit-color-swatch-wrapper { padding: 0; }
.bgr-color-input::-webkit-color-swatch { border: none; border-radius: 6px; }

/* ── Bottom download bar ───────────── */
.bgr-bottom-bar {
    display: flex;
    justify-content: center;
    gap: .75rem;
    margin-top: 1.25rem;
    flex-wrap: wrap;
}

/* ── Mobile Toolbar adjustments ────── */
@media (max-width: 768px) {
    .bgr-toolbar {
        padding: .6rem .75rem;
        gap: .35rem;
        justify-content: center;
    }
    .bgr-tool-btn {
        padding: .5rem .6rem;
        font-size: .72rem;
    }
    .bgr-tool-btn .btn-label { display: none; }
    .bgr-toolbar-sep { height: 24px; margin: 0 .15rem; }
    .bgr-brush-slider input[type="range"] { width: 50px; }
    .bgr-canvas-wrap canvas { cursor: crosshair; }
    .bgr-brush-cursor { display: none !important; }
    .bgr-original-preview { max-height: 150px; }
    .bgr-original-preview img { max-height: 150px; }
}