/* Apple-inspired Drive Interface */

:root {
    --primary-blue: #007AFF;
    --primary-blue-hover: #0056CC;
    --background: #F2F2F7;
    --surface: #FFFFFF;
    --surface-secondary: #F9F9F9;
    --border: #D1D1D6;
    --text-primary: #000000;
    --text-secondary: #6D6D70;
    --text-tertiary: #8E8E93;
    --shadow: rgba(0, 0, 0, 0.1);
    --shadow-hover: rgba(0, 0, 0, 0.15);
    --border-radius: 12px;
    --border-radius-large: 16px;
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
}

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

body {
    font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    min-height: 100vh;
}

/* Header */
.header {
    background: var(--surface);
    border-radius: var(--border-radius-large);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: 0 2px 16px var(--shadow);
    border: 1px solid var(--border);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.logo h1 {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
}

.header-actions {
    display: flex;
    gap: var(--spacing-md);
}

/* Buttons */
.btn-secondary {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--surface-secondary);
    border: 1px solid var(--border);
    border-radius: var(--spacing-sm);
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-secondary:hover {
    background: var(--border);
    transform: translateY(-1px);
}

.btn-primary {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--primary-blue);
    border: none;
    border-radius: var(--spacing-sm);
    color: white;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
}

.btn-primary:hover {
    background: var(--primary-blue-hover);
    transform: translateY(-1px);
}

/* Main Content */
.main-content {
    background: var(--surface);
    border-radius: var(--border-radius-large);
    padding: var(--spacing-xl);
    box-shadow: 0 2px 16px var(--shadow);
    border: 1px solid var(--border);
    min-height: 400px;
}

.files-section {
    width: 100%;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border);
}

.section-header h2 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
}

.file-count {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Files Grid */
.files-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.file-item {
    background: var(--surface-secondary);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    transition: all 0.2s ease;
    cursor: pointer;
}

.file-item:hover {
    background: var(--surface);
    box-shadow: 0 4px 20px var(--shadow-hover);
    transform: translateY(-2px);
    border-color: var(--primary-blue);
}

.file-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.file-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    color: white;
    font-size: 12px;
}

.file-icon.pdf { background: #FF3B30; }
.file-icon.doc { background: #007AFF; }
.file-icon.docx { background: #007AFF; }
.file-icon.txt { background: #8E8E93; }
.file-icon.jpg { background: #FF9500; }
.file-icon.jpeg { background: #FF9500; }
.file-icon.png { background: #FF9500; }
.file-icon.gif { background: #FF9500; }
.file-icon.mp4 { background: #AF52DE; }
.file-icon.mp3 { background: #FF2D92; }
.file-icon.zip { background: #34C759; }
.file-icon.rar { background: #34C759; }
.file-icon.default { background: var(--text-tertiary); }

.file-info {
    flex: 1;
}

.file-name {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.file-details {
    display: flex;
    gap: var(--spacing-md);
    font-size: 12px;
    color: var(--text-secondary);
}

.file-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    color: var(--text-secondary);
}

.empty-icon {
    margin-bottom: var(--spacing-md);
}

.empty-state h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.empty-state p {
    font-size: 14px;
}

/* Loading */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(242, 242, 247, 0.8);
    backdrop-filter: blur(10px);
    display: none;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    z-index: 1000;
}

.loading-overlay.show {
    display: flex;
}

.loading-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border);
    border-top-color: var(--primary-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: var(--spacing-md);
}

.loading-overlay p {
    color: var(--text-secondary);
    font-weight: 500;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: var(--spacing-md);
    }
    
    .header {
        padding: var(--spacing-md);
    }
    
    .header-content {
        flex-direction: column;
        gap: var(--spacing-md);
        align-items: flex-start;
    }
    
    .main-content {
        padding: var(--spacing-md);
    }
    
    .files-grid {
        grid-template-columns: 1fr;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
    
    .header-actions {
        width: 100%;
        justify-content: flex-start;
    }
    
    .modal {
        margin: var(--spacing-md);
        max-height: calc(100vh - 2 * var(--spacing-md));
    }
    
    .modal-overlay {
        padding: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .logo h1 {
        font-size: 20px;
    }
    
    .file-item {
        padding: var(--spacing-sm);
    }
    
    .file-header {
        gap: var(--spacing-sm);
    }
    
    .file-icon {
        width: 32px;
        height: 32px;
        font-size: 10px;
    }
    
    .file-name {
        font-size: 14px;
    }
    
    .file-details {
        font-size: 11px;
    }
}

/* Animations */
.file-item {
    animation: fadeInUp 0.5s ease forwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Focus states for accessibility */
.btn-secondary:focus,
.btn-primary:focus,
.file-item:focus {
    outline: 2px solid var(--primary-blue);
    outline-offset: 2px;
}

/* Modal Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(10px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    padding: var(--spacing-lg);
}

.modal {
    background: var(--surface);
    border-radius: var(--border-radius-large);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    max-width: 800px;
    max-height: 90vh;
    width: 100%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border);
    background: var(--surface-secondary);
}

.modal-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--spacing-xs);
    transition: all 0.2s ease;
}

.modal-close:hover {
    background: var(--border);
    color: var(--text-primary);
}

.modal-body {
    flex: 1;
    overflow: auto;
    padding: var(--spacing-lg);
}

.modal-content {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
}

.modal-content h1,
.modal-content h2,
.modal-content h3 {
    color: var(--text-primary);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.modal-content h1 {
    font-size: 24px;
    font-weight: 700;
}

.modal-content h2 {
    font-size: 20px;
    font-weight: 600;
}

.modal-content h3 {
    font-size: 18px;
    font-weight: 600;
}

.modal-content strong {
    font-weight: 600;
}

.modal-content code {
    background: var(--surface-secondary);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
    font-size: 14px;
}

.modal-content pre {
    background: var(--surface-secondary);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    overflow-x: auto;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
    font-size: 14px;
    line-height: 1.5;
}

.modal-content a {
    color: var(--primary-blue);
    text-decoration: none;
}

.modal-content a:hover {
    text-decoration: underline;
}

/* Header Actions Container */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.header-actions {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
    flex-wrap: wrap;
}

/* File Actions Improvements */
.file-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    flex-wrap: wrap;
}

.file-actions .btn-secondary {
    font-size: 12px;
    padding: 6px var(--spacing-sm);
}

.file-actions .btn-primary {
    font-size: 12px;
    padding: 6px var(--spacing-sm);
}