/**
 * RankSmartTools PDF Platform Stylesheet
 * Design System: Precision Utility
 */

.pdf-tools-shell {
    --rst-cobalt: #0058bc;
    --rst-cobalt-hover: #004ea7;
    --rst-electric: #0070eb;
    --rst-navy: #181c23;
    --rst-slate: #414754;
    --rst-border: #e4e4e7;
    --rst-surface: #f9f9ff;
    --rst-well: #f2f3fe;
    --rst-emerald: #10b981;
    --rst-emerald-bg: rgba(16, 185, 129, 0.1);
    --rst-crimson: #dc2626;

    background: #ffffff;
    border: 1px solid var(--rst-border);
    border-radius: 12px;
    padding: 24px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03), 0 8px 24px rgba(0, 0, 0, 0.04);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    color: var(--rst-navy);
    margin-bottom: 32px;
}

/* Header & Status Bar */
.pdf-tools-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--rst-border);
    margin-bottom: 20px;
}

.pdf-engine-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: #eff6ff;
    color: var(--rst-cobalt);
    border: 1px solid rgba(0, 88, 188, 0.15);
    padding: 6px 12px;
    border-radius: 9999px;
    font-size: 13px;
    font-weight: 600;
}

.pdf-engine-badge .pulse-dot {
    width: 8px;
    height: 8px;
    background-color: var(--rst-emerald);
    border-radius: 50%;
    box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2);
    display: inline-block;
}

.pdf-tools-fullscreen-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: transparent;
    border: 1px solid var(--rst-border);
    border-radius: 8px;
    padding: 6px 12px;
    font-size: 13px;
    font-weight: 500;
    color: var(--rst-slate);
    cursor: pointer;
    transition: all 0.2s ease;
}

.pdf-tools-fullscreen-btn:hover {
    background: var(--rst-surface);
    color: var(--rst-navy);
    border-color: #cbd5e1;
}

/* Dropzone */
.pdf-dropzone {
    border: 2px dashed #cbd5e1;
    background: var(--rst-surface);
    border-radius: 12px;
    padding: 48px 24px;
    text-align: center;
    cursor: pointer;
    transition: all 0.25s ease;
    display: block;
    margin: 0 auto;
}

.pdf-dropzone:hover,
.pdf-dropzone.dragover {
    border-color: var(--rst-cobalt);
    background: #f0f7ff;
}

.pdf-dropzone-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 16px;
    color: var(--rst-cobalt);
    display: flex;
    align-items: center;
    justify-content: center;
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 88, 188, 0.08);
}

.pdf-dropzone-title {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 18px;
    font-weight: 700;
    color: var(--rst-navy);
    margin-bottom: 6px;
}

.pdf-dropzone-subtitle {
    font-size: 14px;
    color: var(--rst-slate);
    margin-bottom: 16px;
}

.pdf-dropzone-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--rst-cobalt);
    color: #ffffff;
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 14px;
    box-shadow: 0 2px 6px rgba(0, 88, 188, 0.2);
    transition: background 0.2s;
}

.pdf-dropzone:hover .pdf-dropzone-btn {
    background: var(--rst-cobalt-hover);
}

.pdf-dropzone input[type="file"] {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* Workbench Layout */
.pdf-workbench {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 24px;
    align-items: start;
    margin-top: 20px;
}

@media (max-width: 991px) {
    .pdf-workbench {
        grid-template-columns: 1fr;
    }
}

/* Document & Page Canvas Area */
.pdf-stage {
    background: var(--rst-surface);
    border: 1px solid var(--rst-border);
    border-radius: 12px;
    padding: 20px;
    min-height: 480px;
}

.pdf-stage-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 18px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--rst-border);
}

.pdf-stage-title {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 16px;
    font-weight: 700;
    color: var(--rst-navy);
}

.pdf-stage-actions {
    display: flex;
    gap: 8px;
}

.pdf-stage-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: #ffffff;
    border: 1px solid var(--rst-border);
    border-radius: 6px;
    padding: 6px 10px;
    font-size: 12px;
    font-weight: 600;
    color: var(--rst-slate);
    cursor: pointer;
    transition: all 0.15s;
}

.pdf-stage-btn:hover {
    color: var(--rst-navy);
    border-color: #cbd5e1;
}

/* Page Thumbnails Grid */
.pdf-page-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 16px;
    max-height: 560px;
    overflow-y: auto;
    padding: 4px;
}

.pdf-page-card {
    background: #ffffff;
    border: 1px solid var(--rst-border);
    border-radius: 8px;
    padding: 8px;
    text-align: center;
    position: relative;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    transition: all 0.2s ease;
    user-select: none;
    cursor: grab;
}

.pdf-page-card:hover {
    border-color: var(--rst-cobalt);
    box-shadow: 0 4px 12px rgba(0, 88, 188, 0.12);
}

.pdf-page-card.selected {
    border-color: var(--rst-cobalt);
    box-shadow: 0 0 0 2px var(--rst-cobalt);
}

.pdf-page-card.disabled-page {
    opacity: 0.4;
    filter: grayscale(1);
}

.pdf-page-thumb-wrap {
    width: 100%;
    aspect-ratio: 1 / 1.35;
    background: #f1f3f5;
    border-radius: 4px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    margin-bottom: 8px;
}

.pdf-page-thumb-wrap canvas {
    max-width: 100%;
    max-height: 100%;
    display: block;
    transition: transform 0.25s ease;
}

.pdf-page-badge {
    position: absolute;
    bottom: 6px;
    left: 6px;
    background: rgba(24, 28, 35, 0.85);
    color: #ffffff;
    font-size: 11px;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 4px;
}

.pdf-page-controls {
    display: flex;
    justify-content: center;
    gap: 4px;
}

.pdf-page-action-btn {
    background: transparent;
    border: 1px solid var(--rst-border);
    border-radius: 4px;
    width: 26px;
    height: 26px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--rst-slate);
    cursor: pointer;
    transition: all 0.15s;
}

.pdf-page-action-btn:hover {
    background: var(--rst-well);
    color: var(--rst-cobalt);
    border-color: var(--rst-cobalt);
}

.pdf-page-action-btn.delete-btn:hover {
    color: var(--rst-crimson);
    border-color: var(--rst-crimson);
}

/* Multi-Document Stack List */
.pdf-doc-stack {
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-height: 540px;
    overflow-y: auto;
}

.pdf-doc-item {
    display: flex;
    align-items: center;
    gap: 14px;
    background: #ffffff;
    border: 1px solid var(--rst-border);
    border-radius: 8px;
    padding: 12px 16px;
    transition: all 0.2s;
    cursor: grab;
}

.pdf-doc-item:hover {
    border-color: var(--rst-cobalt);
    box-shadow: 0 2px 8px rgba(0, 88, 188, 0.08);
}

.pdf-doc-drag-handle {
    color: #94a3b8;
    cursor: grab;
}

.pdf-doc-icon {
    width: 36px;
    height: 36px;
    background: var(--rst-well);
    color: var(--rst-cobalt);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.pdf-doc-info {
    flex-grow: 1;
    overflow: hidden;
}

.pdf-doc-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--rst-navy);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.pdf-doc-meta {
    font-size: 12px;
    color: var(--rst-slate);
    display: flex;
    gap: 12px;
    margin-top: 2px;
}

.pdf-doc-remove {
    background: transparent;
    border: none;
    color: #94a3b8;
    cursor: pointer;
    padding: 6px;
    border-radius: 4px;
    transition: color 0.15s;
}

.pdf-doc-remove:hover {
    color: var(--rst-crimson);
}

/* Sidebar Options Drawer */
.pdf-options-drawer {
    background: #ffffff;
    border: 1px solid var(--rst-border);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.02);
}

.pdf-options-title {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 16px;
    font-weight: 700;
    color: var(--rst-navy);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--rst-border);
}

.pdf-form-group {
    margin-bottom: 18px;
}

.pdf-form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--rst-navy);
    margin-bottom: 6px;
}

.pdf-form-control {
    width: 100%;
    padding: 10px 12px;
    font-size: 14px;
    border: 1px solid var(--rst-border);
    border-radius: 8px;
    background: #ffffff;
    color: var(--rst-navy);
    transition: border 0.15s, box-shadow 0.15s;
}

.pdf-form-control:focus {
    outline: none;
    border-color: var(--rst-electric);
    box-shadow: 0 0 0 3px rgba(0, 112, 235, 0.12);
}

/* Option Chips & Presets */
.pdf-preset-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
    gap: 8px;
    margin-bottom: 14px;
}

.pdf-preset-chip {
    background: var(--rst-surface);
    border: 1px solid var(--rst-border);
    border-radius: 8px;
    padding: 8px 6px;
    text-align: center;
    cursor: pointer;
    font-size: 12px;
    font-weight: 600;
    color: var(--rst-slate);
    transition: all 0.2s ease;
}

.pdf-preset-chip:hover {
    border-color: var(--rst-cobalt);
    color: var(--rst-cobalt);
}

.pdf-preset-chip.active {
    background: var(--rst-cobalt);
    color: #ffffff;
    border-color: var(--rst-cobalt);
}

/* Range Slider */
.pdf-slider-row {
    display: flex;
    align-items: center;
    gap: 12px;
}

.pdf-slider {
    flex-grow: 1;
    accent-color: var(--rst-cobalt);
}

.pdf-slider-val {
    font-variant-numeric: tabular-nums;
    font-size: 13px;
    font-weight: 600;
    color: var(--rst-slate);
    min-width: 42px;
    text-align: right;
}

/* Toggle Checkbox */
.pdf-toggle-label {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--rst-navy);
    cursor: pointer;
    margin-bottom: 10px;
}

.pdf-toggle-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--rst-cobalt);
    border-radius: 4px;
}

/* Primary CTA Button */
.pdf-primary-cta {
    width: 100%;
    background: var(--rst-cobalt);
    color: #ffffff;
    border: none;
    border-radius: 8px;
    padding: 12px 20px;
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0, 88, 188, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.2s ease;
    margin-top: 16px;
}

.pdf-primary-cta:hover:not(:disabled) {
    background: var(--rst-cobalt-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 88, 188, 0.3);
}

.pdf-primary-cta:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Progress & Live Processing */
.pdf-progress-box {
    margin-top: 20px;
    background: var(--rst-well);
    border: 1px solid var(--rst-border);
    border-radius: 8px;
    padding: 16px;
}

.pdf-progress-header {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--rst-navy);
}

.pdf-progress-track {
    height: 8px;
    background: #e2e8f0;
    border-radius: 9999px;
    overflow: hidden;
}

.pdf-progress-fill {
    height: 100%;
    width: 0%;
    background: var(--rst-cobalt);
    border-radius: 9999px;
    transition: width 0.3s ease;
}

/* Result Artifact Card */
.pdf-result-card {
    background: #ffffff;
    border: 1px solid #10b981;
    border-radius: 12px;
    padding: 24px;
    text-align: center;
    margin-top: 24px;
    box-shadow: 0 4px 16px rgba(16, 185, 129, 0.08);
}

.pdf-result-icon {
    width: 56px;
    height: 56px;
    background: var(--rst-emerald-bg);
    color: var(--rst-emerald);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
}

.pdf-result-title {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 20px;
    font-weight: 700;
    color: var(--rst-navy);
    margin-bottom: 8px;
}

.pdf-result-summary {
    font-size: 14px;
    color: var(--rst-slate);
    margin-bottom: 20px;
}

.pdf-result-actions {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.pdf-btn-download {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--rst-cobalt);
    color: #ffffff;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 700;
    font-size: 15px;
    text-decoration: none;
    box-shadow: 0 2px 6px rgba(0, 88, 188, 0.2);
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

.pdf-btn-download:hover {
    background: var(--rst-cobalt-hover);
    color: #ffffff;
    transform: translateY(-1px);
}

.pdf-btn-reset {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    color: var(--rst-slate);
    border: 1px solid var(--rst-border);
    padding: 12px 20px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
}

.pdf-btn-reset:hover {
    background: var(--rst-surface);
    color: var(--rst-navy);
    border-color: #cbd5e1;
}

/* Error Alert */
.pdf-error-banner {
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: #991b1b;
    border-radius: 8px;
    padding: 12px 16px;
    font-size: 13px;
    margin-top: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}