/* ==========================================================================
   Remove PDF Pages Tool Styles — D3 Dev Tools
   ========================================================================== */

.pdf-remove-container {
    max-width: 1100px;
    margin: 0 auto;
}

/* ---- Upload Dropzone ---- */
.pdf-remove-dropzone {
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-surface);
    padding: 3.5rem 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.25s ease;
    box-shadow: var(--shadow-sm);
    position: relative;
}

.pdf-remove-dropzone:hover,
.pdf-remove-dropzone.drag-over {
    border-color: var(--color-accent);
    background: color-mix(in srgb, var(--color-accent) 6%, var(--color-surface));
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.pdf-remove-dropzone__icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: color-mix(in srgb, var(--color-accent) 12%, var(--color-surface));
    color: var(--color-accent);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin-bottom: 1rem;
    transition: transform 0.25s ease;
}

.pdf-remove-dropzone:hover .pdf-remove-dropzone__icon {
    transform: scale(1.1);
}

/* ---- Active File Header ---- */
.pdf-active-file-header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1rem 1.25rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: 1rem;
}

/* ---- Quick Selection Toolbar (Controls Row) ---- */
.pdf-selection-toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.85rem 1.25rem;
    background: var(--color-surface-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: 0.75rem;
}

.pdf-range-input-group {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    flex: 1 1 auto;
    max-width: 450px;
}

.pdf-range-input-group .input-group {
    width: 100%;
    min-width: 260px;
}

.pdf-range-input-group .form-control {
    min-width: 180px;
    font-size: 0.875rem;
}

@media (min-width: 992px) {
    .pdf-range-input-group {
        max-width: 480px;
    }

    .pdf-range-input-group .input-group {
        min-width: 320px;
    }
}

@media (min-width: 1200px) {
    .pdf-range-input-group {
        max-width: 520px;
    }
}

.pdf-bulk-tabs {
    display: flex;
    flex-wrap: wrap;
}

.pdf-bulk-tabs .btn {
    padding-left: 0.85rem;
    padding-right: 0.85rem;
    font-weight: 500;
}

/* ---- Dedicated Selection Status Bar (Stable, never shifts controls) ---- */
.pdf-selection-status-bar {
    margin-bottom: 1.25rem;
}

.pdf-status-alert {
    width: 100%;
    min-height: 2.5rem;
    padding: 0.55rem 1rem;
    border-radius: var(--radius-md);
    font-size: 0.88rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
    text-align: center;
    border: 1px solid transparent;
}

.pdf-status-alert--neutral {
    background: var(--color-surface-elevated);
    border-color: var(--color-border);
    color: var(--color-fg-muted);
}

.pdf-status-alert--active {
    background: color-mix(in srgb, var(--color-primary, #7c3aed) 10%, var(--color-surface));
    border-color: color-mix(in srgb, var(--color-primary, #7c3aed) 30%, transparent);
    color: var(--color-primary, #7c3aed);
}

.pdf-status-alert--danger {
    background: color-mix(in srgb, var(--color-danger, #dc3545) 10%, var(--color-surface));
    border-color: color-mix(in srgb, var(--color-danger, #dc3545) 35%, transparent);
    color: var(--color-danger, #dc3545);
}

/* ---- Responsive Page Grid ---- */
.pdf-page-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(175px, 1fr));
    gap: 1.25rem;
    margin-bottom: 1.5rem;
}

@media (max-width: 575.98px) {
    .pdf-page-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: 0.75rem;
    }
}

/* ---- Individual Page Card ---- */
.pdf-page-card {
    position: relative;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    box-shadow: var(--shadow-xs);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
    user-select: none;
    min-width: 0;
    max-width: 100%;
}

.pdf-page-card:hover {
    box-shadow: var(--shadow-md);
    border-color: color-mix(in srgb, var(--color-accent) 50%, var(--color-border));
}

.pdf-page-card.dragging {
    opacity: 0.4;
    transform: scale(0.96);
    border: 2px dashed var(--color-accent);
}

.pdf-page-card.drag-target-left {
    box-shadow: -4px 0 0 0 var(--color-accent);
}

.pdf-page-card.drag-target-right {
    box-shadow: 4px 0 0 0 var(--color-accent);
}

/* Page Number Badge */
.pdf-page-badge {
    position: absolute;
    top: 8px;
    left: 8px;
    z-index: 3;
    background: rgba(18, 10, 30, 0.85);
    color: #ffffff;
    font-size: 0.72rem;
    font-weight: 700;
    padding: 2px 7px;
    border-radius: 4px;
    backdrop-filter: blur(4px);
    transition: all 0.2s ease;
}

/* Checkbox Toggle Container */
.pdf-page-check {
    position: absolute;
    top: 8px;
    right: 8px;
    z-index: 4;
    width: 26px;
    height: 26px;
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: transparent;
    font-size: 0.9rem;
    transition: all 0.2s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);
}

.pdf-page-card:hover .pdf-page-check {
    border-color: var(--color-accent);
}

/* Page Thumbnail Wrap */
.pdf-page-thumb-wrap {
    position: relative;
    height: 180px;
    background: color-mix(in srgb, var(--color-surface-elevated) 70%, var(--color-surface));
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8px;
    overflow: hidden;
}

@media (max-width: 575.98px) {
    .pdf-page-thumb-wrap {
        height: 145px;
    }
}

.pdf-page-canvas {
    max-height: 100%;
    max-width: 100%;
    object-fit: contain;
    border-radius: 3px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    background: #ffffff;
    transition: filter 0.25s ease, opacity 0.25s ease;
}

/* Removed Page State */
.pdf-page-card.is-marked-for-removal {
    border-color: var(--color-danger);
    background: color-mix(in srgb, var(--color-danger) 4%, var(--color-surface));
}

.pdf-page-card.is-marked-for-removal .pdf-page-check {
    background: var(--color-danger);
    border-color: var(--color-danger);
    color: #ffffff;
}

.pdf-page-card.is-marked-for-removal .pdf-page-badge {
    background: var(--color-danger);
}

.pdf-page-card.is-marked-for-removal .pdf-page-canvas {
    opacity: 0.35;
    filter: grayscale(90%);
}



/* Card Action Toolbar (Reorder) */
.pdf-page-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.4rem 0.6rem;
    border-top: 1px solid var(--color-border);
    background: var(--color-surface);
    z-index: 3;
}

.pdf-page-btn {
    padding: 0.2rem 0.4rem;
    font-size: 0.75rem;
    border-radius: 4px;
    line-height: 1;
}

.pdf-page-drag-handle {
    color: var(--color-fg-muted);
    font-size: 0.9rem;
    cursor: grab;
    padding: 0.2rem 0.35rem;
    border-radius: 4px;
    transition: color 0.15s ease;
}

.pdf-page-drag-handle:hover {
    color: var(--color-accent);
}

/* Result Card */
.pdf-remove-result {
    display: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-surface);
    box-shadow: var(--shadow-md);
    padding: 2.5rem 1.5rem;
    text-align: center;
    margin-top: 1.5rem;
}

.pdf-remove-result.show {
    display: block;
    animation: fadeInScale 0.3s ease;
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.97);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@media (max-width: 575.98px) {
    .pdf-remove-dropzone {
        padding: 2rem 0.75rem;
    }

    .pdf-active-file-header {
        padding: 0.75rem;
    }

    .pdf-selection-toolbar {
        padding: 0.75rem;
        flex-direction: column;
        align-items: stretch;
        gap: 0.65rem;
    }

    .pdf-range-input-group {
        width: 100%;
    }

    .pdf-range-input-group .input-group {
        width: 100%;
        min-width: 0;
    }

    .pdf-range-input-group .form-control {
        flex: 1;
        min-width: 0;
        max-width: none;
    }

    .pdf-bulk-tabs {
        display: flex;
        flex-wrap: wrap;
        width: 100%;
    }

    .pdf-bulk-tabs .btn {
        flex: 1 1 auto;
        border-radius: var(--radius-sm) !important;
        margin: 1px;
        padding: 0.35rem 0.5rem;
        font-size: 0.78rem;
    }

    .pdf-status-alert {
        font-size: 0.82rem;
        padding: 0.5rem 0.75rem;
    }

    .pdf-remove-result {
        padding: 1.75rem 0.75rem;
    }
}