* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

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

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    border-bottom: 2px solid #e0e0e0;
    margin-bottom: 20px;
}

.header h1 {
    font-size: 28px;
    color: #2c3e50;
}

.status {
    display: flex;
    align-items: center;
    gap: 20px;
    font-size: 14px;
    color: #666;
}

#connection-status {
    padding: 5px 12px;
    border-radius: 20px;
    font-weight: 500;
}

#connection-status.connected {
    background: #e8f5e9;
    color: #2e7d32;
}

#connection-status.disconnected {
    background: #ffebee;
    color: #c62828;
}

#path-display {
    font-family: 'Monaco', 'Consolas', monospace;
    background: #e3f2fd;
    padding: 5px 15px;
    border-radius: 5px;
    color: #1565c0;
}

.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    padding: 10px 15px;
    background: #fff;
    border-radius: 8px;
    margin-bottom: 15px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.crumb {
    color: #1976d2;
    cursor: pointer;
    padding: 5px 10px;
    border-radius: 4px;
    transition: background 0.2s;
}

.crumb:hover {
    background: #e3f2fd;
}

.crumb:last-child {
    color: #333;
    cursor: default;
    background: transparent;
}

.crumb:not(:last-child)::after {
    content: '/';
    margin-left: 5px;
    color: #999;
}

.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    padding: 15px;
    background: #fff;
    border-radius: 8px;
    margin-bottom: 15px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.toolbar-left,
.toolbar-right,
.toolbar-center {
    display: flex;
    gap: 10px;
}

.toolbar-center {
    flex: 1;
    justify-content: center;
    min-width: 300px;
}

.search-box {
    display: flex;
    align-items: center;
    background: #f5f5f5;
    border-radius: 8px;
    padding: 5px 10px;
    width: 100%;
    max-width: 400px;
}

.search-box input {
    flex: 1;
    border: none;
    background: transparent;
    padding: 8px;
    font-size: 14px;
    outline: none;
}

.search-box input::placeholder {
    color: #999;
}

.search-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 16px;
    padding: 5px;
    opacity: 0.7;
    transition: opacity 0.2s;
}

.search-btn:hover {
    opacity: 1;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: all 0.2s;
}

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

.btn-primary {
    background: #2196f3;
    color: white;
}

.btn-primary:hover:not(:disabled) {
    background: #1976d2;
}

.btn-secondary {
    background: #f5f5f5;
    color: #333;
}

.btn-secondary:hover:not(:disabled) {
    background: #e0e0e0;
}

.btn-danger {
    background: #f44336;
    color: white;
}

.btn-danger:hover:not(:disabled) {
    background: #d32f2f;
}

.file-list-container {
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    overflow: hidden;
}

.file-list {
    width: 100%;
    border-collapse: collapse;
}

.file-list th,
.file-list td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

.file-list th {
    background: #fafafa;
    font-weight: 600;
    color: #666;
    font-size: 13px;
    text-transform: uppercase;
}

.file-list tbody tr {
    transition: background 0.2s;
}

.file-list tbody tr:hover {
    background: #f5f5f5;
}

.file-list tbody tr.selected {
    background: #e3f2fd;
}

.col-checkbox {
    width: 50px;
}

.col-name {
    min-width: 200px;
}

.col-size {
    width: 120px;
}

.col-time {
    width: 180px;
}

.col-actions {
    width: 150px;
}

.file-name {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    color: #1976d2;
}

.file-name:hover {
    text-decoration: underline;
}

.file-name.is-dir {
    color: #2e7d32;
    font-weight: 500;
}

.file-icon {
    font-size: 20px;
}

.file-size {
    color: #666;
    font-size: 13px;
}

.file-time {
    color: #666;
    font-size: 13px;
}

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

.action-btn {
    padding: 5px 10px;
    border: none;
    background: transparent;
    cursor: pointer;
    font-size: 14px;
    border-radius: 4px;
    transition: background 0.2s;
}

.action-btn:hover {
    background: #e0e0e0;
}

.action-btn.delete:hover {
    background: #ffebee;
    color: #c62828;
}

.drop-zone {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(33, 150, 243, 0.9);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.drop-zone.active {
    display: flex;
}

.drop-zone-content {
    text-align: center;
    color: white;
}

.drop-icon {
    font-size: 80px;
    display: block;
    margin-bottom: 20px;
}

.drop-zone-content p {
    font-size: 24px;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: 12px;
    width: 100%;
    max-width: 450px;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.modal-large {
    max-width: 900px;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    border-bottom: 1px solid #eee;
}

.modal-header h3 {
    font-size: 18px;
    color: #333;
}

.modal-close {
    background: none;
    border: none;
    font-size: 28px;
    cursor: pointer;
    color: #999;
    line-height: 1;
}

.modal-close:hover {
    color: #333;
}

.modal-body {
    padding: 20px;
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    padding: 15px 20px;
    border-top: 1px solid #eee;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    color: #666;
    font-size: 14px;
}

.form-group input {
    width: 100%;
    padding: 10px 15px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
}

.form-group input:focus {
    outline: none;
    border-color: #2196f3;
}

.move-filename {
    padding: 10px;
    background: #f5f5f5;
    border-radius: 6px;
    margin-bottom: 15px;
    font-family: monospace;
}

.dir-tree {
    max-height: 300px;
    overflow-y: auto;
    border: 1px solid #eee;
    border-radius: 6px;
    padding: 10px;
}

.dir-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    cursor: pointer;
    border-radius: 4px;
    margin-bottom: 2px;
}

.dir-item:hover {
    background: #f5f5f5;
}

.dir-item.selected {
    background: #e3f2fd;
}

.dir-item.current {
    background: #fff3e0;
}

.preview-image {
    max-width: 100%;
    max-height: 60vh;
    display: block;
    margin: 0 auto;
}

.preview-text {
    white-space: pre-wrap;
    font-family: 'Monaco', 'Consolas', monospace;
    font-size: 13px;
    line-height: 1.5;
    max-height: 60vh;
    overflow: auto;
    background: #f5f5f5;
    padding: 15px;
    border-radius: 6px;
}

.preview-placeholder {
    text-align: center;
    padding: 60px 20px;
    color: #999;
}

.preview-placeholder .icon {
    font-size: 80px;
    display: block;
    margin-bottom: 20px;
}

.notification {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 15px 25px;
    background: #333;
    color: white;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s;
    z-index: 2000;
}

.notification.show {
    transform: translateY(0);
    opacity: 1;
}

.notification.success {
    background: #4caf50;
}

.notification.error {
    background: #f44336;
}

.notification.info {
    background: #2196f3;
}

.empty-message {
    text-align: center;
    padding: 60px 20px;
    color: #999;
}

.empty-message .icon {
    font-size: 60px;
    display: block;
    margin-bottom: 15px;
}

.loading {
    text-align: center;
    padding: 40px;
    color: #666;
}

.loading::after {
    content: '';
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid #e0e0e0;
    border-top-color: #2196f3;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-left: 10px;
    vertical-align: middle;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

@media (max-width: 768px) {
    .header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }

    .toolbar {
        flex-direction: column;
    }

    .toolbar-left,
    .toolbar-right,
    .toolbar-center {
        justify-content: center;
        width: 100%;
    }

    .toolbar-center {
        order: -1;
        margin-bottom: 10px;
    }

    .search-box {
        max-width: 100%;
    }

    .file-list th:nth-child(3),
    .file-list td:nth-child(3),
    .file-list th:nth-child(4),
    .file-list td:nth-child(4) {
        display: none;
    }

    .file-actions {
        flex-direction: column;
        gap: 2px;
    }
}

.tooltip {
    position: relative;
}

.tooltip::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    padding: 5px 10px;
    background: #333;
    color: white;
    font-size: 12px;
    border-radius: 4px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;
}

.tooltip:hover::after {
    opacity: 1;
}

.upload-list {
    max-height: 300px;
    overflow-y: auto;
    margin-bottom: 15px;
}

.upload-item {
    display: flex;
    align-items: center;
    padding: 10px;
    border-bottom: 1px solid #eee;
    gap: 10px;
}

.upload-item:last-child {
    border-bottom: none;
}

.upload-item-icon {
    font-size: 24px;
}

.upload-item-info {
    flex: 1;
    min-width: 0;
}

.upload-item-name {
    font-weight: 500;
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.upload-item-status {
    font-size: 12px;
    color: #666;
}

.upload-progress-container {
    height: 8px;
    background: #e0e0e0;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 10px;
    display: none;
}

.upload-progress-container.active {
    display: block;
}

.upload-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, #2196f3, #4caf50);
    border-radius: 4px;
    transition: width 0.3s ease;
    width: 0%;
}

.upload-stats {
    text-align: center;
    font-size: 14px;
    color: #666;
    display: none;
}

.upload-stats.active {
    display: block;
}