#pdf-pn-ui {
    --pn-accent: #2563eb;
    --pn-accent-hover: #1d4ed8;
    --pn-success: #059669;
    --pn-border: #e5e7eb;
    --pn-muted: #6b7280;
    --pn-bg: #f8fafc;
    font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
    max-width: 1100px;
    margin: 0 auto;
}

#pdf-pn-ui .pn-section {
    padding: 1.25rem 0;
}

#pdf-pn-ui .pn-lead {
    color: var(--pn-muted);
    margin: 0 0 1rem;
}

#pn-pdf-input {
    position: absolute;
    width: 1px;
    height: 1px;
    opacity: 0;
    overflow: hidden;
    pointer-events: none;
}

.pn-layout {
    display: grid;
    grid-template-columns: minmax(280px, 360px) 1fr;
    gap: 1.5rem;
    align-items: start;
}

@media (max-width: 860px) {
    .pn-layout {
        grid-template-columns: 1fr;
    }
}

.pn-panel {
    background: #fff;
    border: 1px solid var(--pn-border);
    border-radius: 12px;
    padding: 1.25rem;
}

.pn-label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: #374151;
    margin: 0.75rem 0 0.35rem;
}

.pn-optional {
    font-weight: 400;
    color: var(--pn-muted);
}

.pn-input,
.pn-select {
    width: 100%;
    padding: 0.5rem 0.65rem;
    border: 1px solid var(--pn-border);
    border-radius: 8px;
    font-size: 1rem;
    box-sizing: border-box;
    background: #fff;
}

.pn-input-sm {
    width: 4.5rem;
    display: inline-block;
}

.pn-range-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.pn-check {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    margin: 0.85rem 0 0;
    font-size: 0.85rem;
    color: #374151;
    cursor: pointer;
    line-height: 1.4;
}

.pn-check input {
    margin-top: 0.2rem;
    flex-shrink: 0;
}

#pdf-pn-ui input[type="range"] {
    width: 100%;
    margin: 0.25rem 0;
}

.pn-pos-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 4px;
    max-width: 140px;
}

.pn-pos-grid button {
    aspect-ratio: 1;
    border: 1px solid var(--pn-border);
    border-radius: 6px;
    background: #f9fafb;
    cursor: pointer;
    padding: 0;
}

.pn-pos-grid button:hover {
    border-color: var(--pn-accent);
    background: #eff6ff;
}

.pn-pos-grid button.is-active {
    border-color: var(--pn-accent);
    background: #2563eb;
    box-shadow: inset 0 0 0 2px #fff;
}

.pn-pos-grid button.is-active::after {
    content: '';
    display: block;
    width: 6px;
    height: 6px;
    margin: auto;
    background: #fff;
    border-radius: 50%;
    margin-top: calc(50% - 3px);
}

.pn-actions {
    margin-top: 1.25rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    align-items: center;
}

#pdf-pn-ui .pn-btn {
    display: inline-block;
    padding: 0.65rem 1.25rem;
    border-radius: 8px;
    border: none;
    font-size: 1rem;
    cursor: pointer;
    text-decoration: none;
    font-weight: 600;
}

#pdf-pn-ui .pn-btn-primary {
    background: var(--pn-accent);
    color: #fff;
}

#pdf-pn-ui .pn-btn-primary:hover {
    background: var(--pn-accent-hover);
}

#pdf-pn-ui .pn-btn-success {
    background: var(--pn-success);
    color: #fff;
}

.pn-link-btn {
    background: none;
    border: none;
    color: var(--pn-accent);
    cursor: pointer;
    font-size: 0.9rem;
    text-decoration: underline;
    padding: 0;
}

.pn-preview-label {
    font-size: 0.875rem;
    color: var(--pn-muted);
    margin: 0 0 0.5rem;
}

.pn-file-info {
    font-size: 0.875rem;
    color: #111827;
    font-weight: 600;
    margin: 0 0 0.5rem;
    word-break: break-all;
}

.pn-preview-stage {
    position: relative;
    min-height: 420px;
    background: #e5e7eb;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
}

.pn-preview-stage.has-pdf {
    min-height: 0;
    background: #fff;
}

.pn-preview-stage.has-pdf .pn-pdf-drop,
.pn-preview-stage.is-loading .pn-pdf-drop {
    display: none !important;
    pointer-events: none;
    visibility: hidden;
}

.pn-preview-stage.has-pdf.is-ready #pn-preview-canvas {
    display: block !important;
    position: relative;
    z-index: 1;
    width: 100%;
    height: auto;
}

.pn-preview-stage.has-pdf .pn-preview-overlay {
    z-index: 2;
}

.pn-preview-loading {
    display: none !important;
    position: absolute;
    inset: 0;
    z-index: 3;
    align-items: center;
    justify-content: center;
    background: #fff;
    font-size: 0.9rem;
    color: var(--pn-muted);
}

.pn-preview-stage.is-loading .pn-preview-loading {
    display: flex !important;
}

.pn-pdf-drop {
    position: absolute;
    inset: 0;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--pn-bg);
    border: 2px dashed var(--pn-border);
    border-radius: 12px;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
}

.pn-pdf-drop.is-dragover,
.pn-pdf-drop:hover {
    border-color: var(--pn-accent);
    background: #eff6ff;
}

.pn-pdf-drop-pulse {
    animation: pn-pulse 0.6s ease 2;
    border-color: var(--pn-accent);
}

@keyframes pn-pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(37, 99, 235, 0); }
    50% { box-shadow: 0 0 0 6px rgba(37, 99, 235, 0.35); }
}

.pn-pdf-drop-inner {
    text-align: center;
    padding: 1.5rem;
}

.pn-pdf-drop-inner label.pn-btn {
    cursor: pointer;
    margin-top: 0.25rem;
}

.pn-pdf-drop-icon {
    font-size: 2.5rem;
    display: block;
    margin-bottom: 0.5rem;
}

.pn-pdf-drop-inner p {
    margin: 0 0 0.75rem;
    color: #374151;
}

.pn-pdf-drop-hint {
    display: block;
    margin-top: 0.5rem;
    font-size: 0.8rem;
    color: var(--pn-muted);
}

.pn-preview-overlay {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.pn-ov-num {
    position: absolute;
    font-weight: 600;
    white-space: nowrap;
    line-height: 1.2;
}

.pn-progress-track {
    height: 8px;
    background: #e5e7eb;
    border-radius: 4px;
    overflow: hidden;
    margin-top: 0.75rem;
}

#pn-progress-bar {
    height: 100%;
    width: 0;
    background: var(--pn-accent);
    transition: width 0.3s ease;
}

.pn-result {
    text-align: center;
    padding: 2rem 1rem;
}

.pn-icon-ok {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.pn-result-info {
    color: var(--pn-muted);
    margin-bottom: 1rem;
}

.pn-status {
    margin-top: 1rem;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    background: #eff6ff;
    color: #1e40af;
    font-size: 0.9rem;
}

.pn-status.pn-status-error {
    background: #fef2f2;
    color: #b91c1c;
}