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

:root {
    --bg: #f8f9fa;
    --surface: #ffffff;
    --border: #dee2e6;
    --text: #212529;
    --text-muted: #6c757d;
    --primary: #0d6efd;
    --primary-hover: #0b5ed7;
    --danger: #dc3545;
    --success: #198754;
    --radius: 6px;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --font: 'Segoe UI', system-ui, sans-serif;
    --font-mono: 'Fira Code', 'Cascadia Code', monospace;
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* NAV */
header {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    height: 56px;
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-user {
    margin-left: auto;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.nav-user a {
    color: var(--primary);
    text-decoration: none;
    margin-left: 8px;
}

.nav-user a:hover {
    color: var(--primary-hover);
}

nav .brand {
    font-size: 1.2rem;
    font-weight: 700;
    text-decoration: none;
    color: var(--text);
}

nav ul {
    list-style: none;
    display: flex;
    gap: 24px;
}

nav ul a {
    text-decoration: none;
    color: var(--text-muted);
    font-size: 0.95rem;
    transition: color 0.15s;
}

nav ul a:hover, nav ul a.active {
    color: var(--primary);
}

/* MAIN */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 32px 20px;
    flex: 1;
    width: 100%;
}

/* FOOTER */
footer {
    border-top: 1px solid var(--border);
    text-align: center;
    padding: 16px;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* CARD */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    margin-bottom: 24px;
}

.card h2 {
    margin-bottom: 20px;
    font-size: 1.1rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.85rem;
}

/* FORM */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.form-group input,
.form-group select {
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    transition: border-color 0.15s;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
}

.form-group select[multiple] {
    height: 120px;
}

.form-hint {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 2px;
}

/* BUTTON */
.btn {
    padding: 9px 20px;
    border: none;
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-family: var(--font);
    cursor: pointer;
    transition: background 0.15s;
}

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

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

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* STATUS */
.status-bar {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    border-radius: var(--radius);
    font-size: 0.9rem;
    margin-bottom: 20px;
}

.status-bar.running {
    background: #fff3cd;
    border: 1px solid #ffc107;
    color: #856404;
}

.status-bar.done {
    background: #d1e7dd;
    border: 1px solid #198754;
    color: var(--success);
}

.status-bar.error {
    background: #f8d7da;
    border: 1px solid var(--danger);
    color: var(--danger);
}

.spinner {
    width: 16px;
    height: 16px;
    border: 2px solid currentColor;
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    display: inline-block;
}

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

/* TABLE */
.table-wrap {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

thead th {
    background: var(--bg);
    border-bottom: 2px solid var(--border);
    padding: 10px 12px;
    text-align: left;
    font-weight: 600;
    white-space: nowrap;
    color: var(--text-muted);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

tbody tr:hover {
    background: var(--bg);
}

tbody td {
    padding: 9px 12px;
    border-bottom: 1px solid var(--border);
    font-family: var(--font-mono);
    font-size: 0.85rem;
}

/* TEXTAREA (SQL editor) */
.sql-editor {
    width: 100%;
    min-height: 200px;
    padding: 12px;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #1e1e1e;
    color: #d4d4d4;
    resize: vertical;
}

.sql-editor:focus {
    outline: none;
    border-color: var(--primary);
}

/* CHECKBOX GROUP */
.checkbox-group {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
}

.checkbox-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 4px 0;
}

.info-icon {
    cursor: help;
    color: var(--text-muted);
    font-size: 0.9rem;
}


/* FLOW EXPLORER */
.flow-meta-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 12px;
    margin-bottom: 8px;
}

.meta-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.meta-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-muted);
}

.meta-value {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    word-break: break-all;
}

.flow-section {
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}

.flow-section h3 {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.flow-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.flow-list li {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    padding: 4px 0;
    border-bottom: 1px solid var(--border);
}

.flow-list li:last-child {
    border-bottom: none;
}

/* TIMELINE */
.timeline {
    display: flex;
    flex-direction: column;
    gap: 0;
    padding-left: 12px;
    border-left: 2px solid var(--border);
}

.timeline-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 8px 0;
    position: relative;
}

.timeline-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--primary);
    border: 2px solid var(--surface);
    box-shadow: 0 0 0 2px var(--primary);
    margin-left: -17px;
    margin-top: 3px;
    flex-shrink: 0;
}

.timeline-content {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.timeline-desc {
    font-size: 0.9rem;
    color: var(--text);
}

.timeline-ts {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-muted);
}

.export-group {
    display: flex;
    align-items: center;
    gap: 6px;
}