:root {
    --primary: #0066cc;
    --primary-hover: #0052a3;
    --success: #28a745;
    --success-hover: #218838;
    --warning: #ffc107;
    --error: #dc3545;
    --bg: #f5f7fa;
    --card-bg: #ffffff;
    --text: #333333;
    --text-muted: #6c757d;
    --border: #dee2e6;
    --nav-bg: #1a1a2e;
    --nav-text: #ffffff;
}

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

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

nav {
    background: var(--nav-bg);
    color: var(--nav-text);
    padding: 0 2rem;
    display: flex;
    align-items: center;
    gap: 2rem;
    height: 56px;
}

.nav-brand {
    font-weight: 700;
    font-size: 1.1rem;
    white-space: nowrap;
}

.nav-links {
    display: flex;
    gap: 0.5rem;
}

.nav-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    padding: 0.4rem 0.8rem;
    border-radius: 4px;
    transition: background 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
    color: #fff;
    background: rgba(255, 255, 255, 0.15);
}

.nav-status {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.85rem;
}

main {
    max-width: 900px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.card {
    background: var(--card-bg);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.card h2 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border);
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.form-group-wide {
    grid-column: 1 / -1;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
}

.form-group input,
.form-group select {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 0.95rem;
    background: #fff;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(0, 102, 204, 0.15);
}

.form-actions {
    margin-top: 1rem;
}

.form-actions-main {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.btn {
    padding: 0.55rem 1.2rem;
    border: none;
    border-radius: 4px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

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

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

.btn-secondary {
    background: #e9ecef;
    color: var(--text);
}

.btn-secondary:hover {
    background: #dde0e3;
}

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

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

.badge {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    border-radius: 10px;
    font-size: 0.78rem;
    font-weight: 600;
}

.badge-success {
    background: #d4edda;
    color: #155724;
}

.badge-error {
    background: #f8d7da;
    color: #721c24;
}

.badge-warning {
    background: #fff3cd;
    color: #856404;
}

.badge-inactive {
    background: rgba(255, 255, 255, 0.2);
    color: rgba(255, 255, 255, 0.7);
}

.alert {
    padding: 0.75rem 1rem;
    border-radius: 6px;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-warning {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffeeba;
}

.alert-info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.88rem;
}

th, td {
    padding: 0.5rem 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    font-weight: 600;
    color: var(--text-muted);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.row-error {
    background: #fff5f5;
}

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

small.text-muted {
    font-size: 0.78rem;
}

/* Input with button (folder picker) */
.input-with-btn {
    display: flex;
    gap: 0.25rem;
}

.input-with-btn input {
    flex: 1;
    min-width: 0;
}

.btn-icon {
    padding: 0.4rem 0.6rem;
    background: #e9ecef;
    border: 1px solid var(--border);
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    line-height: 1;
    transition: background 0.2s;
}

.btn-icon:hover {
    background: #dde0e3;
}

/* Button loading state */
.btn:disabled {
    opacity: 0.7;
    cursor: wait;
}

.btn-spinner {
    font-style: italic;
}

/* Modal overlay */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal {
    background: var(--card-bg);
    border-radius: 10px;
    width: 90%;
    max-width: 550px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border);
}

.modal-header h3 {
    font-size: 1rem;
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-muted);
    padding: 0 0.25rem;
    line-height: 1;
}

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

.modal-body {
    overflow-y: auto;
    padding: 0.5rem;
}

/* Folder picker fields (toggle between source/processed) */
.folder-picker-fields {
    display: flex;
    gap: 0.5rem;
    padding: 0.5rem 0.5rem 0.75rem;
    border-bottom: 1px solid var(--border);
    margin-bottom: 0.5rem;
}

.folder-field-btn {
    flex: 1;
    padding: 0.5rem 0.75rem;
    background: #f8f9fa;
    border: 2px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.8rem;
    text-align: left;
    transition: border-color 0.2s, background 0.2s;
}

.folder-field-btn:hover {
    border-color: var(--primary);
    background: #e8f0fe;
}

.folder-field-btn.active {
    border-color: var(--primary);
    background: #e8f0fe;
}

.folder-field-btn strong {
    display: block;
    font-size: 0.9rem;
    margin-top: 0.15rem;
    color: var(--primary);
}

/* Folder list items */
.folder-items {
    display: flex;
    flex-direction: column;
    gap: 0;
    padding: 0.25rem;
}

.folder-row {
    display: flex;
    align-items: center;
}

.folder-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.55rem 0.75rem;
    background: none;
    border: 1px solid transparent;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.9rem;
    text-align: left;
    flex: 1;
    min-width: 0;
    transition: background 0.15s;
}

.folder-item:hover {
    background: #f0f4f8;
    border-color: var(--border);
}

.folder-item.selected {
    background: #e8f5e9;
    border-color: var(--success);
}

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

/* Folder add button (+) */
.folder-add-btn {
    flex-shrink: 0;
    background: none;
    border: 1px solid transparent;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.85rem;
    padding: 0.35rem 0.5rem;
    color: var(--text-muted);
    transition: background 0.15s, color 0.15s;
    white-space: nowrap;
}

.folder-add-btn:hover {
    background: #e8f0fe;
    border-color: var(--primary);
    color: var(--primary);
}

/* Inline create subfolder */
.create-inline {
    padding: 0 0.5rem 0.4rem 2.2rem;
}

.create-folder-inline {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    background: #f8f9fa;
    border: 1px solid var(--border);
    border-radius: 5px;
    padding: 0.4rem 0.5rem;
}

.create-folder-prefix {
    font-size: 0.82rem;
    color: var(--text-muted);
    white-space: nowrap;
}

.create-folder-input {
    flex: 1;
    min-width: 60px;
    padding: 0.3rem 0.5rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 0.88rem;
}

.create-folder-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(0, 102, 204, 0.15);
}

.btn-sm {
    padding: 0.3rem 0.7rem;
    font-size: 0.82rem;
}

.text-error {
    color: var(--error);
    font-size: 0.8rem;
    padding: 0.25rem 0.5rem 0;
}

/* Upload zone */
.upload-zone {
    border: 2px dashed var(--border);
    border-radius: 8px;
    padding: 2.5rem 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
}

.upload-zone:hover,
.upload-zone-active {
    border-color: var(--primary);
    background: #f0f6ff;
}

.upload-icon {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.upload-text {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.upload-hint {
    font-size: 0.82rem;
    color: var(--text-muted);
}

/* Progress bars */
.progress-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.88rem;
    font-weight: 600;
    margin-bottom: 0.4rem;
    margin-top: 1rem;
}

.progress-bar-track {
    width: 100%;
    height: 10px;
    background: #e9ecef;
    border-radius: 5px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: var(--primary);
    border-radius: 5px;
    transition: width 0.3s ease;
}

.progress-bar-processing {
    background: var(--success);
}

@media (max-width: 640px) {
    nav {
        flex-wrap: wrap;
        height: auto;
        padding: 0.75rem 1rem;
        gap: 0.5rem;
    }

    .nav-status {
        width: 100%;
        margin-left: 0;
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

    .form-actions-main {
        flex-direction: column;
    }
}