:root {
    --background-color: #121212;
    --surface-color: #1e1e1e;
    --primary-color: #3a5bb9;
    --primary-light-color: #6a8ce9;
    --accent-color: #30475e;
    --text-color: #f0f0f0;
    --text-secondary-color: #aaaaaa;
    --border-color: #333333;
    --danger-color: #cf6679;
    --success-color: #4ecca3;
    --warning-color: #ffc107;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header */
.header {
    background-color: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-light-color);
}

.disk-space {
    max-width: 300px;
}

.disk-space-info {
    margin-bottom: 0.5rem;
}

.disk-warning {
    color: var(--warning-color);
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

/* Main Content */
.main-content {
    display: flex;
    flex: 1;
}

/* Sidebar */
.sidebar {
    width: 250px;
    background-color: var(--surface-color);
    padding: 1.5rem;
    border-right: 1px solid var(--border-color);
}

.sidebar nav ul {
    list-style: none;
}

.sidebar nav ul li {
    margin-bottom: 0.5rem;
}

.sidebar nav ul li a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 500;
    transition: color 0.3s;
}

.sidebar nav ul li a:hover {
    color: var(--primary-light-color);
}

.upload-section {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.upload-section h3 {
    margin-bottom: 1rem;
    font-size: 1.1rem;
    color: var(--text-secondary-color);
}

.file-input {
    margin-bottom: 1rem;
}

.file-input input[type="file"] {
    display: none;
}

.file-input label {
    display: block;
    padding: 0.7rem 1rem;
    background-color: var(--accent-color);
    color: var(--text-color);
    text-align: center;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.file-input label:hover {
    background-color: var(--primary-color);
}

/* Content */
.content {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
}

/* Footer */
.footer {
    background-color: var(--surface-color);
    border-top: 1px solid var(--border-color);
    padding: 1rem 2rem;
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-secondary-color);
}

/* Buttons */
.btn {
    padding: 0.5rem 1rem;
    background-color: var(--primary-color);
    color: var(--text-color);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background-color 0.3s;
    text-decoration: none;
    display: inline-block;
}

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

.btn-view {
    background-color: var(--accent-color);
}

.btn-view:hover {
    background-color: #3d5a75;
}

.btn-download {
    background-color: var(--success-color);
    color: #121212;
}

.btn-download:hover {
    background-color: #5fdab6;
}

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

.btn-delete:hover {
    background-color: #e5798b;
}

.btn-back {
    background-color: var(--accent-color);
    margin-right: 0.5rem;
}

/* Progress Bar */
.progress-bar {
    width: 100%;
    height: 10px;
    background-color: var(--surface-color);
    border-radius: 5px;
    overflow: hidden;
    margin: 0.5rem 0;
}

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

/* File List */
.files-container {
    background-color: var(--surface-color);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.files-container h2 {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.file-list-header {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    padding: 1rem 1.5rem;
    background-color: rgba(255, 255, 255, 0.05);
    font-weight: 600;
    border-bottom: 1px solid var(--border-color);
}

.file-item {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.3s;
}

.file-item:hover {
    background-color: rgba(255, 255, 255, 0.03);
}

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

.file-name {
    word-break: break-all;
}

.file-actions {
    display: flex;
    gap: 0.5rem;
}

.no-files {
    padding: 2rem;
    text-align: center;
    color: var(--text-secondary-color);
}

/* File Detail Page */
.file-detail h2 {
    margin-bottom: 1.5rem;
    word-break: break-word;
}

.file-actions-bar {
    display: flex;
    margin-bottom: 2rem;
}

.video-preview {
    margin-bottom: 2rem;
    background-color: var(--surface-color);
    border-radius: 8px;
    overflow: hidden;
    padding: 1.5rem;
}

.video-preview h3 {
    margin-bottom: 1rem;
}

.video-preview video {
    width: 100%;
    max-height: 500px;
    background-color: #000;
    border-radius: 4px;
}

.file-metadata {
    margin-bottom: 2rem;
    background-color: var(--surface-color);
    border-radius: 8px;
    overflow: hidden;
    padding: 1.5rem;
}

.file-metadata h3 {
    margin-bottom: 1rem;
}

.metadata-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
    gap: 1.5rem;
}

.metadata-section {
    background-color: rgba(255, 255, 255, 0.03);
    border-radius: 6px;
    padding: 1rem;
}

.metadata-section h4 {
    margin-bottom: 0.8rem;
    color: var(--primary-light-color);
}

.metadata-items {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.metadata-item {
    display: flex;
    justify-content: space-between;
}

.metadata-label {
    color: var(--text-secondary-color);
    margin-right: 1rem;
}

.video-operations {
    background-color: var(--surface-color);
    border-radius: 8px;
    overflow: hidden;
    padding: 1.5rem;
}

.video-operations h3 {
    margin-bottom: 1rem;
}

.operation-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
}

.operation-item {
    background-color: rgba(255, 255, 255, 0.03);
    border-radius: 6px;
    padding: 1rem;
}

.operation-item h4 {
    margin-bottom: 0.8rem;
    color: var(--primary-light-color);
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary-color);
}

.form-group input {
    width: 100%;
    padding: 0.5rem;
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-color);
}

.operation-progress-container {
    margin-top: 2rem;
    padding: 1rem;
    background-color: rgba(255, 255, 255, 0.03);
    border-radius: 6px;
}

#operation-result {
    margin-top: 2rem;
    padding: 1rem;
    background-color: rgba(255, 255, 255, 0.03);
    border-radius: 6px;
}

#result-content {
    margin-top: 1rem;
}

#result-content img {
    max-width: 100%;
    border-radius: 4px;
}

#result-content a {
    display: inline-block;
    margin-top: 1rem;
    color: var(--primary-light-color);
    text-decoration: none;
}

#result-content a:hover {
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 768px) {
    .main-content {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    
    .header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .disk-space {
        max-width: 100%;
        margin-top: 1rem;
    }
    
    .file-list-header, .file-item {
        grid-template-columns: 2fr 1fr 1fr;
    }
    
    .file-date {
        display: none;
    }
}

@media (max-width: 576px) {
    .file-list-header, .file-item {
        grid-template-columns: 1fr 1fr;
    }
    
    .file-size {
        display: none;
    }
    
    .metadata-container {
        grid-template-columns: 1fr;
    }
    
    .operation-container {
        grid-template-columns: 1fr;
    }
}