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

:root {
    --bg-primary: #0f0f1a;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #16213e;
    --bg-hover: #1e2a4a;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0b0;
    --accent: #4a9eff;
    --accent-hover: #6ab2ff;
    --success: #4ade80;
    --error: #f87171;
    --warning: #fbbf24;
    --border: #2a2a4a;
    --radius: 8px;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* ===== Header ===== */
header {
    text-align: center;
    padding: 30px 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 30px;
}

header h1 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* ===== Upload Section ===== */
.upload-section {
    margin-bottom: 30px;
}

.drop-zone {
    background: var(--bg-secondary);
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: 40px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.drop-zone:hover {
    border-color: var(--accent);
    background: var(--bg-tertiary);
}

.drop-zone.drag-over {
    border-color: var(--accent);
    background: var(--bg-hover);
    transform: scale(1.02);
}

.upload-icon {
    width: 48px;
    height: 48px;
    color: var(--accent);
    margin-bottom: 12px;
}

.browse-link {
    color: var(--accent);
    text-decoration: underline;
    cursor: pointer;
}

.hint {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-top: 8px;
}

/* ===== Queue Status ===== */
.queue-status {
    margin-top: 20px;
    background: var(--bg-secondary);
    border-radius: var(--radius);
    padding: 20px;
}

.queue-status h3 {
    margin-bottom: 15px;
    font-size: 1.1rem;
    color: var(--text-primary);
}

.tasks-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.empty-state {
    color: var(--text-secondary);
    text-align: center;
    padding: 20px;
    font-style: italic;
}

.task-item {
    background: var(--bg-tertiary);
    border-radius: var(--radius);
    padding: 12px 16px;
    border-left: 3px solid var(--accent);
    transition: all 0.3s ease;
}

.task-item.success { border-left-color: var(--success); }
.task-item.error { border-left-color: var(--error); }
.task-item.processing { border-left-color: var(--warning); }

.task-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.task-filename {
    font-weight: 500;
    font-size: 0.9rem;
}

.task-status-badge {
    font-size: 0.75rem;
    padding: 2px 8px;
    border-radius: 12px;
    font-weight: 600;
}

.task-status-badge.queued { background: var(--bg-hover); color: var(--text-secondary); }
.task-status-badge.processing { background: rgba(251, 191, 36, 0.2); color: var(--warning); }
.task-status-badge.success { background: rgba(74, 222, 128, 0.2); color: var(--success); }
.task-status-badge.error { background: rgba(248, 113, 113, 0.2); color: var(--error); }

.task-progress-bar {
    height: 4px;
    background: var(--bg-hover);
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: 6px;
}

.task-progress-fill {
    height: 100%;
    background: var(--accent);
    border-radius: 2px;
    transition: width 0.5s ease;
}

.task-item.success .task-progress-fill { background: var(--success); }
.task-item.error .task-progress-fill { background: var(--error); }

.task-message {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* ===== Results Section ===== */
.results-section {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 20px;
    min-height: 500px;
}

.panel-left, .panel-right {
    background: var(--bg-secondary);
    border-radius: var(--radius);
    padding: 20px;
    overflow: hidden;
}

.panel-left h2, .panel-right h2 {
    font-size: 1.2rem;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border);
}

/* ===== File Tree ===== */
.file-tree {
    overflow-y: auto;
    max-height: calc(100vh - 250px);
}

.folder-item {
    margin-bottom: 8px;
}

.folder-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    cursor: pointer;
    border-radius: var(--radius);
    transition: background 0.2s;
    white-space: nowrap;
    overflow: hidden;
}

.folder-header:hover {
    background: var(--bg-hover);
}

.folder-toggle {
    font-size: 0.7rem;
    color: var(--text-secondary);
    width: 16px;
    text-align: center;
    flex-shrink: 0;
}

.folder-icon {
    font-size: 1.1rem;
    flex-shrink: 0;
}

.folder-name {
    flex: 1;
    font-weight: 500;
    font-size: 0.9rem;
    overflow: hidden;
    text-overflow: ellipsis;
    min-width: 0;
}

.folder-date {
    font-size: 0.7rem;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.folder-delete {
    font-size: 1rem;
    cursor: pointer;
    padding: 2px 6px;
    border-radius: 4px;
    transition: background 0.2s;
    margin-left: 8px;
    flex-shrink: 0;
}

.folder-delete:hover {
    background: rgba(248, 113, 113, 0.2);
}

.folder-files {
    margin-left: 24px;
    padding-left: 8px;
    border-left: 1px solid var(--border);
}

.file-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 10px;
    border-radius: var(--radius);
    transition: background 0.2s;
    cursor: default;
}

.file-item.clickable {
    cursor: pointer;
}

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

.file-icon {
    font-size: 1rem;
}

.file-name {
    flex: 1;
    font-size: 0.85rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.file-size {
    font-size: 0.7rem;
    color: var(--text-secondary);
}

/* ===== Viewer ===== */
.viewer {
    overflow-y: auto;
    max-height: calc(100vh - 250px);
}

.empty-viewer {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 300px;
    color: var(--text-secondary);
}

.md-content {
    background: var(--bg-tertiary);
    border-radius: var(--radius);
    overflow: hidden;
}

.md-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: var(--bg-hover);
    border-bottom: 1px solid var(--border);
}

.md-title {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-family: monospace;
}

.btn-download {
    background: var(--accent);
    color: white;
    text-decoration: none;
    padding: 6px 12px;
    border-radius: var(--radius);
    font-size: 0.8rem;
    transition: background 0.2s;
}

.btn-download:hover {
    background: var(--accent-hover);
}

.md-body {
    padding: 20px;
    line-height: 1.8;
}

.md-body h1 {
    font-size: 1.5rem;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.md-body h2, .md-body h3 {
    margin-top: 20px;
    margin-bottom: 10px;
}

.md-body p {
    margin-bottom: 12px;
}

.md-body strong {
    color: var(--accent);
}

.md-body blockquote {
    border-left: 3px solid var(--accent);
    padding-left: 16px;
    margin: 16px 0;
    color: var(--text-secondary);
}

.md-body code {
    background: var(--bg-hover);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: monospace;
    font-size: 0.9em;
}

.md-body pre {
    background: var(--bg-hover);
    padding: 16px;
    border-radius: var(--radius);
    overflow-x: auto;
    margin: 16px 0;
}

.md-body ul, .md-body ol {
    margin-left: 20px;
    margin-bottom: 12px;
}

.file-preview {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 300px;
    gap: 20px;
}

.error {
    color: var(--error);
    padding: 20px;
    text-align: center;
}

/* ===== Toast ===== */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    padding: 12px 20px;
    border-radius: var(--radius);
    color: white;
    font-size: 0.9rem;
    animation: slideIn 0.3s ease;
    max-width: 300px;
    word-wrap: break-word;
    box-shadow: var(--shadow);
}

.toast-info { background: var(--accent); }
.toast-success { background: var(--success); }
.toast-error { background: var(--error); }

.toast-hide {
    animation: slideOut 0.3s ease forwards;
}

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes slideOut {
    from { transform: translateX(0); opacity: 1; }
    to { transform: translateX(100%); opacity: 0; }
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .results-section {
        grid-template-columns: 1fr;
    }
    
    header h1 {
        font-size: 1.5rem;
    }
    
    .drop-zone {
        padding: 20px;
    }
}