:root {
    --bg: #f4f7fb;
    --surface: #ffffff;
    --surface-2: #f8fafc;
    --border: #e5eaf1;
    --text: #0f172a;
    --muted: #64748b;
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --success: #059669;
    --danger: #dc2626;
    --shadow: 0 10px 30px rgba(15, 23, 42, 0.06);
    --radius: 16px;
    --sidebar-width: 240px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: linear-gradient(180deg, #eef4ff 0%, var(--bg) 220px);
    color: var(--text);
    min-height: 100vh;
}

.hidden { display: none !important; }

.auth-page {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
}

.auth-card {
    width: 100%;
    max-width: 420px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 32px;
}

.brand { text-align: center; margin-bottom: 28px; }
.brand-icon {
    width: 56px; height: 56px; border-radius: 16px;
    background: linear-gradient(135deg, #2563eb, #7c3aed);
    color: #fff; display: grid; place-items: center;
    font-weight: 700; font-size: 24px; margin: 0 auto 12px;
}
.brand h1 { margin: 0 0 8px; font-size: 28px; }
.brand p, .subtitle { color: var(--muted); margin: 0; }

label { display: block; margin-bottom: 14px; }
label span { display: block; font-size: 13px; color: var(--muted); margin-bottom: 6px; }
input, select, textarea {
    width: 100%; border: 1px solid var(--border); border-radius: 12px;
    padding: 12px 14px; font: inherit; background: #fff;
}
input:focus, select:focus, textarea:focus {
    outline: none; border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.btn {
    border: 0; border-radius: 12px; padding: 12px 18px;
    font: inherit; font-weight: 600; cursor: pointer;
    transition: .2s ease;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-secondary { background: #e2e8f0; color: var(--text); }
.btn-secondary:hover { background: #cbd5e1; }
.btn-ghost { background: transparent; color: var(--muted); }
.btn-block { width: 100%; }
.form-error { color: var(--danger); margin-top: 12px; min-height: 20px; }

.app-shell {
    display: grid;
    grid-template-columns: var(--sidebar-width) 1fr;
    min-height: 100vh;
}

.sidebar {
    background: var(--surface);
    border-right: 1px solid var(--border);
    padding: 24px 16px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.brand.compact {
    display: flex; align-items: center; gap: 12px;
    text-align: left; margin: 0;
}
.brand.compact .brand-icon { width: 40px; height: 40px; font-size: 18px; margin: 0; }
.brand.compact span { font-weight: 700; }

.sidebar-nav { display: flex; flex-direction: column; gap: 8px; flex: 1; }
.nav-link {
    text-decoration: none; color: var(--muted); padding: 12px 14px;
    border-radius: 12px; font-weight: 500;
}
.nav-link:hover, .nav-link.active {
    background: #eff6ff; color: var(--primary);
}

.main-content { padding: 24px 28px 40px; }
.topbar {
    display: flex; justify-content: space-between; align-items: flex-start;
    gap: 16px; margin-bottom: 20px;
}
.topbar h2 { margin: 0 0 6px; }
.topbar-actions { display: flex; gap: 10px; flex-wrap: wrap; }

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px;
    margin-bottom: 20px;
}

.filters-panel .filters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 14px;
    margin-bottom: 16px;
}

.filters-panel .filters-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.grid-stack { min-height: 400px; }
.grid-stack-item-content {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 16px;
    overflow: auto;
}
.widget-header {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 12px;
}
.widget-header h4 { margin: 0; font-size: 15px; }
.widget-sort-select {
    width: auto;
    min-width: 130px;
    padding: 6px 10px;
    font-size: 12px;
    border-radius: 8px;
}
.widget-kpi-value {
    font-size: 32px; font-weight: 700; line-height: 1.1;
}
.widget-kpi-label { color: var(--muted); font-size: 13px; margin-top: 6px; }

.table-widget { width: 100%; border-collapse: collapse; font-size: 13px; }
.table-widget th, .table-widget td {
    padding: 10px 8px; border-bottom: 1px solid var(--border); text-align: left;
}
.table-widget th { color: var(--muted); font-weight: 600; }

.modal {
    position: fixed; inset: 0; background: rgba(15, 23, 42, 0.35);
    display: grid; place-items: center; z-index: 1000; padding: 20px;
}
.modal-content { width: 100%; max-width: 520px; }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 16px; }

.builder-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 20px;
}
.builder-panel h3 { margin-top: 0; }
.tool-group { margin-bottom: 16px; }
.tool-label { display: block; font-size: 12px; color: var(--muted); margin-bottom: 8px; }
.chip-list { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
    border: 1px solid var(--border); background: var(--surface-2);
    border-radius: 999px; padding: 8px 12px; cursor: pointer; font-size: 12px;
}
.chip:hover { border-color: var(--primary); color: var(--primary); }
.builder-actions { display: flex; gap: 10px; }
.validation-msg { margin-top: 12px; min-height: 20px; }
.validation-msg.ok { color: var(--success); }
.validation-msg.error { color: var(--danger); }

.formulas-list { display: flex; flex-direction: column; gap: 10px; }
.formula-item {
    border: 1px solid var(--border); border-radius: 12px; padding: 12px;
    cursor: pointer;
}
.formula-item.active { border-color: var(--primary); background: #eff6ff; }
.formula-item code {
    display: block; margin-top: 8px; font-size: 12px; color: var(--muted);
    word-break: break-all;
}

.sync-states, .sync-logs { display: grid; gap: 10px; }
.sync-state-row, .sync-log-row {
    display: grid; grid-template-columns: 140px 1fr 160px 120px;
    gap: 12px; padding: 12px; border: 1px solid var(--border); border-radius: 12px;
    font-size: 13px;
}
.status-badge {
    display: inline-block; padding: 4px 10px; border-radius: 999px; font-size: 12px;
}
.status-idle { background: #ecfdf5; color: var(--success); }
.status-running { background: #eff6ff; color: var(--primary); }
.status-error, .status-failed { background: #fef2f2; color: var(--danger); }
.status-success { background: #ecfdf5; color: var(--success); }

@media (max-width: 960px) {
    .app-shell { grid-template-columns: 1fr; }
    .sidebar {
        flex-direction: row; align-items: center; flex-wrap: wrap;
        border-right: 0; border-bottom: 1px solid var(--border);
    }
    .sidebar-nav { flex-direction: row; flex-wrap: wrap; }
    .builder-grid { grid-template-columns: 1fr; }
    .sync-state-row, .sync-log-row { grid-template-columns: 1fr; }
}