/* === Upload Zone === */
.upload-zone {
    border: 2px dashed var(--border);
    border-radius: var(--radius-lg);
    padding: 3rem 2rem;
    text-align: center;
    transition: all var(--transition);
    cursor: pointer;
    background: var(--bg-card);
}
.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--accent);
    background: var(--accent-light);
}
.upload-zone-content {
    pointer-events: none;
}
.upload-zone.dragover .upload-zone-content {
    pointer-events: none;
}
.upload-icon {
    font-size: 3rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}
.upload-link {
    color: var(--accent);
    cursor: pointer;
    pointer-events: auto;
}
.upload-link:hover {
    text-decoration: underline;
}
.upload-hint {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-top: 0.5rem;
}

/* === Upload Progress === */
.upload-progress {
    margin-top: 1.5rem;
    text-align: center;
}
.progress-bar {
    width: 100%;
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 0.75rem;
}
.progress-fill {
    height: 100%;
    background: var(--accent);
    border-radius: 3px;
    transition: width 0.3s ease;
    width: 0%;
}
#upload-status {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* === Schema Preview === */
.schema-preview {
    margin-top: 1.5rem;
}
.schema-preview h3 {
    margin-bottom: 1rem;
}
.schema-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    margin-bottom: 1rem;
}
.schema-card h4 {
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.schema-stats {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-secondary);
    font-size: 0.85rem;
}
.schema-stats span {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}
.schema-columns {
    overflow-x: auto;
}

/* AI Analysis section */
.ai-analysis {
    margin-top: 1.5rem;
    padding: 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--accent);
    border-radius: var(--radius-lg);
}
.ai-analysis h4 {
    color: var(--accent);
    margin-bottom: 0.75rem;
}
.ai-summary {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
}
.ai-column-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}
.semantic-type {
    display: inline-block;
    padding: 0.1rem 0.4rem;
    background: var(--accent-light);
    color: var(--accent);
    border-radius: 4px;
    font-size: 0.75rem;
    margin-left: 0.5rem;
}

/* Clarification Q&A */
.ai-clarify {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius);
}
.ai-clarify-q {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    font-style: italic;
}
.ai-clarify-input {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.5rem;
}
.ai-clarify-input input {
    flex: 1;
}

/* === Dataset Grid (list view) === */
.dataset-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 1rem;
}
.dataset-card {
    transition: border-color var(--transition);
}
.dataset-card:hover {
    border-color: var(--border-light);
}

/* === Dataset Detail === */
.dataset-detail {
    max-width: 100%;
}
.dataset-detail code {
    background: var(--bg-tertiary);
    padding: 0.1rem 0.4rem;
    border-radius: 3px;
    font-size: 0.85rem;
    font-family: var(--font-mono);
}

/* === Settings Panel === */
.settings-panel {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
}
.settings-form {
    max-width: 600px;
}
.settings-form label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
    font-weight: 500;
}
.settings-form .form-input {
    width: 100%;
    padding: 0.5rem 0.75rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-primary);
    font-size: 0.9rem;
    box-sizing: border-box;
}
.settings-form .form-input:focus {
    outline: none;
    border-color: var(--accent);
}
.settings-form select.form-input {
    appearance: auto;
}
.settings-form textarea.form-input {
    resize: vertical;
    font-family: var(--font-mono);
    font-size: 0.8rem;
}
.source-config {
    padding: 0.75rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius);
    margin-bottom: 0.75rem;
}

/* === Import History Panel === */
.import-history-panel {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
}
.import-history-panel .data-table {
    font-size: 0.85rem;
}
.import-history-panel .data-table td,
.import-history-panel .data-table th {
    white-space: nowrap;
}

@media (max-width: 600px) {
    .upload-zone {
        padding: 2rem 1.25rem;
    }

    .dataset-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    }

    .ai-clarify-input {
        flex-direction: column;
    }
}