/* ============================================================
   Blur Face — blur-face.css
   Prefix: bft-   Accent: #8B5CF6
   ============================================================ */

.bft-section {
    --accent: #8B5CF6;
    padding: 40px 0 80px;
}

/* Upload zone */
.bft-upload-zone {
    display: flex;
    flex-direction: column;
    align-items: center;
    border: 2px dashed rgba(139, 92, 246, 0.3);
    border-radius: 16px;
    background: rgba(139, 92, 246, 0.03);
    padding: 56px 24px;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
    outline: none;
}

.bft-upload-zone:hover,
.bft-upload-zone:focus-visible {
    border-color: rgba(139, 92, 246, 0.6);
    background: rgba(139, 92, 246, 0.07);
}

.bft-upload-zone.bft-drag-over {
    border-color: #8B5CF6;
    background: rgba(139, 92, 246, 0.1);
}

.bft-upload-icon {
    font-size: 3rem;
    color: #8B5CF6;
    opacity: 0.65;
    margin-bottom: 14px;
    display: block;
}

.bft-upload-title {
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 6px;
}

.bft-upload-sub {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    margin: 0;
}

/* Top bar */
.bft-top-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    padding: 12px 18px;
    background: var(--bg-card, #fff);
    border: 1px solid var(--border-color, #E5E7EB);
    border-radius: 12px;
    margin-bottom: 16px;
}

.bft-file-info {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
    flex: 1;
}

.bft-file-icon {
    font-size: 1.4rem;
    color: #8B5CF6;
    flex-shrink: 0;
}

.bft-file-name {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 240px;
}

.bft-dims {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    white-space: nowrap;
}

.bft-change-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 14px;
    border: 1px solid var(--border-color, #E5E7EB);
    border-radius: 8px;
    background: var(--bg-secondary, #F9FAFB);
    color: var(--text-secondary);
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
    text-decoration: none;
    white-space: nowrap;
}

.bft-change-link:hover {
    border-color: #8B5CF6;
    color: #8B5CF6;
}

/* Layout */
.bft-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 16px;
    align-items: start;
}

/* Controls */
.bft-controls {
    border: 1px solid var(--border-color, #E5E7EB);
    border-radius: 12px;
    padding: 16px;
    background: var(--bg-card, #fff);
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.bft-ctrl-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.bft-ctrl-label {
    font-size: 0.78125rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin: 0;
}

.bft-val-badge {
    background: rgba(139, 92, 246, 0.12);
    color: #8B5CF6;
    border-radius: 4px;
    padding: 1px 5px;
    font-size: 0.75rem;
    font-weight: 700;
}

.bft-hint-text {
    display: flex;
    gap: 8px;
    align-items: flex-start;
    font-size: 0.8125rem;
    color: var(--text-secondary);
    line-height: 1.5;
    background: rgba(139, 92, 246, 0.05);
    border: 1px solid rgba(139, 92, 246, 0.12);
    padding: 10px 12px;
    border-radius: 8px;
    margin: 0;
}

.bft-hint-text i {
    color: #8B5CF6;
    font-size: 1rem;
    margin-top: 1px;
    flex-shrink: 0;
}

.bft-slider {
    width: 100%;
    appearance: none;
    height: 4px;
    border-radius: 2px;
    background: var(--border-color, #E5E7EB);
    outline: none;
    cursor: pointer;
}

.bft-slider::-webkit-slider-thumb {
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: #8B5CF6;
    cursor: pointer;
}

.bft-action-btns {
    display: flex;
    gap: 8px;
}

.bft-btn-undo,
.bft-btn-clear {
    flex: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 7px 10px;
    border: 1px solid var(--border-color, #E5E7EB);
    border-radius: 8px;
    background: var(--bg-secondary, #F9FAFB);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.8125rem;
    font-weight: 600;
    transition: all 0.15s;
}

.bft-btn-undo:hover {
    border-color: #8B5CF6;
    color: #8B5CF6;
}

.bft-btn-clear:hover {
    border-color: #DC2626;
    color: #DC2626;
}

.bft-fmt-tabs {
    display: flex;
    gap: 6px;
}

.bft-fmt-tab {
    flex: 1;
    padding: 7px 6px;
    border: 1px solid var(--border-color, #E5E7EB);
    border-radius: 8px;
    background: var(--bg-secondary, #F9FAFB);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.8125rem;
    font-weight: 600;
    transition: all 0.15s;
    text-align: center;
}

.bft-fmt-tab.bft-active {
    border-color: #8B5CF6;
    background: rgba(139, 92, 246, 0.1);
    color: #8B5CF6;
}

/* Shape type tabs */
.bft-shape-tabs {
    display: flex;
    gap: 6px;
}

.bft-shape-tab {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 10px;
    border: 1px solid var(--border-color, #E5E7EB);
    border-radius: 8px;
    background: var(--bg-secondary, #F9FAFB);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.8125rem;
    font-weight: 600;
    transition: all 0.15s;
    text-align: center;
}

.bft-shape-tab.bft-active {
    border-color: #8B5CF6;
    background: rgba(139, 92, 246, 0.1);
    color: #8B5CF6;
}

.bft-shape-tab:hover:not(.bft-active) {
    border-color: #8B5CF6;
    color: #8B5CF6;
}

/* Effect type tabs */
.bft-effect-tabs {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.bft-effect-tab {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 9px 14px;
    border: 1px solid var(--border-color, #E5E7EB);
    border-radius: 8px;
    background: var(--bg-secondary, #F9FAFB);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 600;
    transition: all 0.15s;
    text-align: left;
}

.bft-effect-tab.bft-active {
    border-color: #8B5CF6;
    background: rgba(139, 92, 246, 0.1);
    color: #8B5CF6;
}

.bft-effect-tab:hover:not(.bft-active) {
    border-color: #8B5CF6;
    color: #8B5CF6;
}

/* Solid color swatches */
.bft-solid-colors {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    align-items: center;
}

.bft-solid-swatch {
    width: 30px;
    height: 30px;
    border-radius: 6px;
    border: 2px solid transparent;
    cursor: pointer;
    transition: border-color 0.15s, transform 0.15s;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    color: #fff;
}

.bft-solid-swatch:hover {
    transform: scale(1.1);
    border-color: rgba(139, 92, 246, 0.5);
}

.bft-solid-swatch.bft-active {
    border-color: #8B5CF6;
    outline: 2px solid rgba(139, 92, 246, 0.3);
    outline-offset: 1px;
}

.bft-swatch-custom {
    border: 2px dashed var(--border-color, #E5E7EB) !important;
}

.bft-swatch-wrap {
    position: relative;
    display: inline-flex;
}

.bft-swatch-wrap input[type="color"] {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
    border: none;
    padding: 0;
}

.bft-btn-dl {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 11px 18px;
    background: #8B5CF6;
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 0.9375rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.bft-btn-dl:hover {
    background: #7C3AED;
}

/* Export action row */
.bft-export-actions {
    flex-direction: row !important;
    gap: 6px !important;
}

.bft-btn-preview,
.bft-btn-copy {
    flex: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 10px;
    border: 1px solid var(--border-color, #E5E7EB);
    border-radius: 8px;
    background: var(--bg-secondary, #F9FAFB);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.8125rem;
    font-weight: 600;
    transition: all 0.15s;
}

.bft-btn-preview:hover {
    border-color: #8B5CF6;
    color: #8B5CF6;
}

.bft-btn-copy:hover {
    border-color: #8B5CF6;
    color: #8B5CF6;
}

/* Before/After Modal */
.bft-preview-modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
}

.bft-preview-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.65);
}

.bft-preview-box {
    position: relative;
    z-index: 1;
    background: var(--bg-card, #fff);
    border-radius: 16px;
    width: min(96vw, 900px);
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.bft-preview-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    border-bottom: 1px solid var(--border-color, #E5E7EB);
    flex-shrink: 0;
}

.bft-preview-title {
    font-size: 0.9375rem;
    font-weight: 700;
    color: var(--text-primary);
    flex: 1;
}

.bft-preview-tabs {
    display: flex;
    gap: 4px;
}

.bft-ptab {
    padding: 5px 12px;
    border: 1px solid var(--border-color, #E5E7EB);
    border-radius: 6px;
    background: var(--bg-secondary, #F9FAFB);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.8125rem;
    font-weight: 600;
    transition: all 0.15s;
}

.bft-ptab.bft-active {
    border-color: #8B5CF6;
    background: rgba(139, 92, 246, 0.1);
    color: #8B5CF6;
}

.bft-preview-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color, #E5E7EB);
    border-radius: 6px;
    background: var(--bg-secondary, #F9FAFB);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.15s;
    flex-shrink: 0;
}

.bft-preview-close:hover {
    border-color: #DC2626;
    color: #DC2626;
}

.bft-preview-body {
    overflow: auto;
    flex: 1;
    padding: 16px;
    background: #111;
    display: flex;
    align-items: center;
    justify-content: center;
}

.bft-preview-canvas {
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: 8px;
}

/* Canvas area */
.bft-canvas-col {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.bft-canvas-wrap {
    position: relative;
    border: 1px solid var(--border-color, #E5E7EB);
    border-radius: 12px;
    overflow: hidden;
    background: #111;
    cursor: crosshair;
}

.bft-canvas {
    display: block;
    width: 100%;
    height: auto;
}

.bft-canvas-display {
    position: relative;
    z-index: 1;
}

.bft-canvas-draw {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 2;
    width: 100% !important;
    height: 100% !important;
    cursor: crosshair;
}

.bft-region-count {
    font-size: 0.8125rem;
    color: var(--text-tertiary, #9CA3AF);
    margin: 0;
}

.bft-canvas-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 6px;
}


@media (max-width: 840px) {
    .bft-layout {
        grid-template-columns: 1fr;
    }

    .bft-section {
        padding: 24px 0 60px;
    }

    .bft-controls {
        order: 2;
        width: 100%;
        box-sizing: border-box;
        min-width: 0;
    }

    .bft-canvas-col {
        order: 1;
        min-width: 0;
    }

    /* Effect tabs: row on mobile to save vertical space */
    .bft-effect-tabs {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .bft-effect-tab {
        flex: 1;
        min-width: 80px;
        justify-content: center;
        font-size: 0.8125rem;
        padding: 8px 6px;
    }

    .bft-export-actions {
        flex-wrap: wrap;
    }

    .bft-btn-preview,
    .bft-btn-copy {
        min-width: 0;
        flex: 1;
    }
}

@media (max-width: 480px) {
    .bft-controls {
        padding: 12px;
        gap: 12px;
    }

    .bft-file-name {
        max-width: 160px;
    }

    .bft-shape-tab,
    .bft-fmt-tab {
        font-size: 0.75rem;
        padding: 7px 4px;
    }

    .bft-btn-undo,
    .bft-btn-clear {
        font-size: 0.75rem;
        padding: 7px 6px;
    }
}

/* Keyboard hints */
.bft-kbd-hints {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 4px 8px;
    margin-top: 4px;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.bft-kbd {
    display: inline-block;
    padding: 1px 6px;
    background: var(--bg-secondary, #F9FAFB);
    border: 1px solid var(--border-color, #E5E7EB);
    border-radius: 4px;
    font-size: 0.6875rem;
    font-weight: 700;
    font-family: monospace;
    color: var(--text-primary);
    letter-spacing: 0.02em;
}