/* CSS Variables for theming */
:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --border-color: #dee2e6;
    --text-color: #212529;
    --text-muted: #6c757d;
    --background-color: #ffffff;
    --hover-color: #f5f5f5;
    --shadow: 0 2px 4px rgba(0,0,0,0.1);
    --border-radius: 4px;
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --text-color: #ffffff;
        --text-muted: #adb5bd;
        --background-color: #1a1a1a;
        --light-color: #2d3748;
        --border-color: #4a5568;
        --hover-color: #2d3748;
        --shadow: 0 2px 4px rgba(255,255,255,0.1);
    }
}

/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    color: var(--text-color);
    background-color: var(--background-color);
    line-height: 1.5;
}

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

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

.header h1 {
    color: var(--primary-color);
    font-size: 1.8rem;
}

.connection-status {
    display: flex;
    align-items: center;
    gap: 10px;
}

.status-disconnected {
    color: var(--danger-color);
}

.status-connected {
    color: var(--success-color);
}

.status-connecting {
    color: var(--warning-color);
}

/* Navigation */
.breadcrumb {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding: 10px 15px;
    background-color: var(--light-color);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

#current-path {
    font-family: monospace;
    font-weight: bold;
    color: var(--text-muted);
}

/* Buttons */
.btn {
    padding: 8px 16px;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s ease;
    text-decoration: none;
    display: inline-block;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: #0056b3;
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: white;
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
}

.btn-small {
    padding: 4px 8px;
    font-size: 12px;
}

/* File List */
.file-list-container {
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.file-list-header {
    display: grid;
    grid-template-columns: 1fr 100px 150px 120px;
    gap: 15px;
    padding: 15px;
    background-color: var(--light-color);
    font-weight: bold;
    border-bottom: 1px solid var(--border-color);
}

.file-list {
    max-height: 600px;
    overflow-y: auto;
}

.file-item {
    display: grid;
    grid-template-columns: 1fr 100px 150px 120px;
    gap: 15px;
    padding: 12px 15px;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.file-item:hover {
    background-color: var(--hover-color);
}

.file-item.selected {
    background-color: rgba(0, 123, 255, 0.1);
}

.file-name {
    display: flex;
    align-items: center;
    gap: 8px;
}

.file-icon {
    font-size: 16px;
}

.file-size {
    color: var(--text-muted);
    font-size: 14px;
}

.file-modified {
    color: var(--text-muted);
    font-size: 14px;
}

.file-actions {
    display: flex;
    gap: 5px;
}

.file-actions button {
    padding: 2px 6px;
    font-size: 12px;
}

/* Upload Area */
.upload-area {
    margin-top: 20px;
    padding: 20px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background-color: var(--light-color);
}

.upload-zone {
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius);
    padding: 40px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease;
}

.upload-zone:hover {
    border-color: var(--primary-color);
    background-color: rgba(0, 123, 255, 0.05);
}

.upload-zone.dragover {
    border-color: var(--primary-color);
    background-color: rgba(0, 123, 255, 0.1);
}

.upload-icon {
    font-size: 48px;
    margin-bottom: 10px;
}

.upload-progress {
    margin-top: 20px;
}

.progress-bar {
    width: 100%;
    height: 20px;
    background-color: #e9ecef;
    border-radius: 10px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
    width: 0%;
}

#progress-text {
    margin-top: 10px;
    text-align: center;
    color: var(--text-muted);
}

/* Real-time Panel */
.realtime-panel {
    margin-top: 30px;
    padding: 20px;
    background-color: var(--light-color);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.realtime-panel h3 {
    margin-bottom: 15px;
    color: var(--primary-color);
}

.realtime-log {
    max-height: 200px;
    overflow-y: auto;
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 10px;
    margin-bottom: 15px;
    font-family: monospace;
    font-size: 12px;
}

.log-entry {
    padding: 2px 0;
    color: var(--text-muted);
}

.log-entry.success {
    color: var(--success-color);
}

.log-entry.error {
    color: var(--danger-color);
}

.log-entry.info {
    color: var(--info-color);
}

/* Context Menu */
.context-menu {
    position: fixed;
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    padding: 5px 0;
    z-index: 1000;
    min-width: 150px;
}

.menu-item {
    padding: 8px 15px;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.menu-item:hover {
    background-color: var(--hover-color);
}

.menu-separator {
    height: 1px;
    background-color: var(--border-color);
    margin: 5px 0;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
}

.modal-content {
    background-color: var(--background-color);
    border-radius: var(--border-radius);
    box-shadow: 0 8px 16px rgba(0,0,0,0.3);
    max-width: 500px;
    width: 90%;
    max-height: 80%;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-muted);
}

.modal-body {
    padding: 20px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    padding: 20px;
    border-top: 1px solid var(--border-color);
}

/* Loading States */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px;
    color: var(--text-muted);
}

.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: 10px;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .breadcrumb {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .file-list-header,
    .file-item {
        grid-template-columns: 1fr 60px;
        grid-template-areas: 
            "name actions"
            "details details";
    }
    
    .file-name {
        grid-area: name;
    }
    
    .file-actions {
        grid-area: actions;
        justify-self: end;
    }
    
    .file-size,
    .file-modified {
        grid-area: details;
        grid-column: 1 / -1;
        display: flex;
        gap: 20px;
        margin-top: 5px;
        font-size: 12px;
    }
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.text-muted {
    color: var(--text-muted);
}

.text-success {
    color: var(--success-color);
}

.text-danger {
    color: var(--danger-color);
}

.text-warning {
    color: var(--warning-color);
}

.text-info {
    color: var(--info-color);
}