.pfm-container {
    display: flex;
    gap: 20px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Sidebar */
.pfm-sidebar {
    flex: 0 0 300px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.pfm-section {
    background: #fff;
    border-radius: 12px;
    padding: 16px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.06);
}

.pfm-section h3 {
    font-size: 0.95em;
    color: #2c3e50;
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid #ecf0f1;
    display: flex;
    align-items: center;
    gap: 8px;
}

.pfm-section h3 i {
    color: #e74c3c;
}

.pfm-upload {
    border: 2px dashed #ddd;
    border-radius: 10px;
    padding: 24px 12px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    background: #fafafa;
}

.pfm-upload:hover,
.pfm-upload.dragover {
    border-color: #e74c3c;
    background: #fef2f2;
}

.pfm-upload i {
    font-size: 1.8em;
    color: #e74c3c;
    margin-bottom: 8px;
}

.pfm-upload p {
    color: #666;
    font-size: 0.85em;
    margin: 0 0 4px;
}

.pfm-hint {
    color: #999;
    font-size: 0.75em;
}

/* Stats */
.pfm-stats {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.pfm-stat-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 12px;
    background: #f8f9fa;
    border-radius: 8px;
}

.pfm-stat-label {
    font-size: 0.85em;
    color: #555;
}

.pfm-stat-value {
    font-size: 1em;
    font-weight: 700;
    color: #e74c3c;
}

/* Actions */
.pfm-actions-wrap {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.pfm-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.pfm-btn {
    flex: 1;
    min-width: 80px;
    padding: 10px;
    border: none;
    border-radius: 8px;
    font-size: 0.85em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
}

.pfm-btn-primary {
    background: #e74c3c;
    color: #fff;
}

.pfm-btn-primary:hover:not(:disabled) {
    background: #c0392b;
}

.pfm-btn-success {
    background: #27ae60;
    color: #fff;
}

.pfm-btn-success:hover:not(:disabled) {
    background: #219a52;
}

.pfm-btn-outline {
    background: #fff;
    color: #e74c3c;
    border: 1px solid #e74c3c;
}

.pfm-btn-outline:hover:not(:disabled) {
    background: #fef2f2;
}

.pfm-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.pfm-usage-info {
    background: #fdecea;
    border-radius: 8px;
    padding: 9px 12px;
    font-size: 0.8em;
    color: #2c3e50;
    text-align: center;
}

.pfm-usage-info i {
    color: #e74c3c;
    margin-right: 4px;
}

/* Main area */
.pfm-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 16px;
    position: relative;
    min-width: 0;
}

.pfm-main.has-vip-mask {
    min-height: 500px;
}

.pfm-file-panel,
.pfm-preview-panel {
    background: #fff;
    border-radius: 12px;
    padding: 16px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.06);
}

.pfm-file-panel h4,
.pfm-preview-panel h4 {
    font-size: 0.95em;
    color: #2c3e50;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.pfm-file-panel h4 i {
    color: #e74c3c;
}

.pfm-preview-panel h4 i {
    color: #27ae60;
}

.pfm-file-count {
    font-size: 0.85em;
    color: #999;
    font-weight: normal;
    margin-left: 4px;
}

.pfm-file-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    min-height: 120px;
}

.pfm-placeholder {
    text-align: center;
    color: #999;
    padding: 30px 20px;
}

.pfm-placeholder i {
    font-size: 2.5em;
    margin-bottom: 10px;
    color: #bdc3c7;
}

.pfm-placeholder p {
    margin: 0;
    font-size: 0.85em;
}

/* File item */
.pfm-file-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    background: #f8f9fa;
    border-radius: 10px;
    border: 2px solid transparent;
    cursor: grab;
    transition: all 0.2s;
    user-select: none;
}

.pfm-file-item:hover {
    border-color: #e74c3c;
    background: #fef2f2;
}

.pfm-file-item.dragging {
    opacity: 0.5;
    cursor: grabbing;
    border-color: #e74c3c;
    box-shadow: 0 4px 12px rgba(231,76,60,0.2);
}

.pfm-file-item.drag-over {
    border-color: #27ae60;
    border-style: dashed;
}

.pfm-file-index {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: #e74c3c;
    color: #fff;
    font-size: 0.75em;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.pfm-file-icon {
    font-size: 1.3em;
    color: #e74c3c;
    flex-shrink: 0;
}

.pfm-file-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.pfm-file-name {
    font-size: 0.85em;
    color: #2c3e50;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.pfm-file-meta {
    font-size: 0.75em;
    color: #999;
}

.pfm-file-actions {
    display: flex;
    gap: 4px;
    flex-shrink: 0;
}

.pfm-file-btn {
    width: 28px;
    height: 28px;
    border: none;
    border-radius: 6px;
    background: #e2e8f0;
    color: #64748b;
    font-size: 0.75em;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
}

.pfm-file-btn:hover:not(:disabled) {
    background: #e74c3c;
    color: #fff;
}

.pfm-file-btn.delete:hover:not(:disabled) {
    background: #e74c3c;
    color: #fff;
}

.pfm-file-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

/* Preview */
.pfm-preview-wrap {
    width: 100%;
    display: flex;
    justify-content: center;
    overflow: auto;
    max-height: 600px;
}

.pfm-preview-info {
    margin-top: 10px;
    text-align: center;
    font-size: 0.85em;
    color: #666;
}

/* Tips */
.pfm-tips {
    background: #fff;
    border-radius: 12px;
    padding: 18px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.06);
}

.pfm-tips h4 {
    font-size: 0.95em;
    color: #2c3e50;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.pfm-tips h4 i {
    color: #f39c12;
}

.pfm-tip-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.pfm-tip-item {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 12px;
    border-left: 3px solid #e74c3c;
}

.pfm-tip-item strong {
    display: block;
    font-size: 0.88em;
    color: #2c3e50;
    margin-bottom: 4px;
}

.pfm-tip-item p {
    font-size: 0.78em;
    color: #666;
    margin: 0;
    line-height: 1.5;
}

/* VIP mask */
.pfm-vip-mask {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 10;
    background: rgba(0,0,0,0.75);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    backdrop-filter: blur(2px);
}

.pfm-vip-mask-inner {
    text-align: center;
    color: #fff;
    padding: 30px;
}

.pfm-vip-mask-icon {
    font-size: 3em;
    margin-bottom: 12px;
}

.pfm-vip-mask-title {
    font-size: 1.3em;
    font-weight: 600;
    margin-bottom: 8px;
}

.pfm-vip-mask-actions {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
}

.pfm-vip-btn {
    background: #e74c3c;
    color: #fff;
    text-decoration: none;
    padding: 10px 24px;
    border-radius: 8px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: background 0.2s;
}

.pfm-vip-btn:hover {
    background: #c0392b;
}

.pm-toast{position:fixed;top:20px;left:50%;transform:translateX(-50%) translateY(-20px);background:#333;color:#fff;padding:10px 20px;border-radius:8px;font-size:0.9em;z-index:9999;opacity:0;transition:all 0.3s ease;pointer-events:none;}.pm-toast.show{opacity:1;transform:translateX(-50%) translateY(0);}.pm-toast.success{background:#27ae60;}.pm-toast.error{background:#e74c3c;}.pm-toast.info{background:#3498db;}

/* Responsive */
@media (max-width: 900px) {
    .pfm-container {
        flex-direction: column;
    }
    .pfm-sidebar {
        flex: 1 1 100%;
        width: 100%;
    }
    .pfm-tip-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .pfm-container {
        padding: 12px;
    }
    .pfm-section,
    .pfm-file-panel,
    .pfm-preview-panel,
    .pfm-tips {
        padding: 12px;
    }
    .pfm-file-item {
        padding: 8px;
    }
    .pfm-file-btn {
        width: 26px;
        height: 26px;
    }
}