:root {
    --sidebar-bg: #0f1729;
    --sidebar-text: #93a0b8;
    --sidebar-text-active: #ffffff;
    --sidebar-active-bg: #1b2540;
    --sidebar-border: #1f2a45;

    --bg: #f4f6fa;
    --card-bg: #ffffff;
    --border: #e6e9f0;

    --text-primary: #101828;
    --text-secondary: #667085;
    --text-muted: #98a2b3;

    --accent: #2563eb;
    --accent-dark: #1d4ed8;
    --success: #12b76a;
    --success-bg: #ecfdf3;
    --danger: #f04438;
    --danger-bg: #fef3f2;
    --pending-bg: #f2f4f7;

    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 1px 2px rgba(16, 24, 40, 0.04), 0 1px 3px rgba(16, 24, 40, 0.08);
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-size: 14px;
}

.app-shell {
    display: flex;
    min-height: 100vh;
}

/* ---------------- Sidebar ---------------- */

.sidebar {
    width: 240px;
    flex-shrink: 0;
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    display: flex;
    flex-direction: column;
    padding: 22px 16px;
    position: sticky;
    top: 0;
    height: 100vh;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0 8px 22px 8px;
    border-bottom: 1px solid var(--sidebar-border);
    margin-bottom: 16px;
}

.brand-mark {
    width: 34px;
    height: 34px;
    border-radius: 8px;
    background: linear-gradient(135deg, #2563eb, #0ea5e9);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 13px;
    letter-spacing: 0.02em;
}

.brand-name {
    color: #fff;
    font-weight: 600;
    font-size: 14.5px;
    line-height: 1.2;
}

.brand-sub {
    color: var(--sidebar-text);
    font-size: 12px;
    margin-top: 2px;
}

.nav {
    display: flex;
    flex-direction: column;
    gap: 2px;
    flex: 1;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--sidebar-text);
    text-decoration: none;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    font-size: 13.5px;
    font-weight: 500;
    transition: background 0.12s ease, color 0.12s ease;
}

.nav-link:hover {
    background: var(--sidebar-active-bg);
    color: #fff;
}

.nav-link.active {
    background: var(--sidebar-active-bg);
    color: var(--sidebar-text-active);
}

.nav-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: currentColor;
    opacity: 0.55;
}

.nav-link.active .nav-dot {
    opacity: 1;
    background: #60a5fa;
}

.sidebar-footer {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding-top: 16px;
    border-top: 1px solid var(--sidebar-border);
}

.conn-pill {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--sidebar-text);
    padding: 4px 2px;
}

.conn-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-muted);
}

.conn-pill.ok .conn-dot { background: #34d399; }
.conn-pill.fail .conn-dot { background: #f87171; }
.conn-pill.pending .conn-dot { background: #6b7280; }

/* ---------------- Main content ---------------- */

.main {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.topbar {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    padding: 24px 32px;
    border-bottom: 1px solid var(--border);
    background: var(--card-bg);
}

.topbar-title h1 {
    margin: 0;
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
}

.topbar-title p {
    margin: 4px 0 0 0;
    color: var(--text-secondary);
    font-size: 13px;
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.last-refreshed {
    font-size: 12.5px;
    color: var(--text-muted);
    white-space: nowrap;
}

.content {
    padding: 28px 32px 48px 32px;
    display: flex;
    flex-direction: column;
    gap: 22px;
}

/* ---------------- Buttons ---------------- */

.btn {
    border: none;
    border-radius: var(--radius-sm);
    padding: 9px 16px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    white-space: nowrap;
}

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

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

.btn-secondary {
    background: var(--pending-bg);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover { background: #e9edf3; }

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

.btn-ghost:hover { background: var(--pending-bg); }

/* ---------------- Status / KPI cards ---------------- */

.status-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
    gap: 14px;
}

.status-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 16px 18px;
    border-left: 4px solid var(--text-muted);
}

.status-card.ok { border-left-color: var(--success); }
.status-card.fail { border-left-color: var(--danger); }

.status-card-label {
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.status-card-value {
    font-size: 18px;
    font-weight: 700;
    margin-top: 6px;
}

.status-card.ok .status-card-value { color: var(--success); }
.status-card.fail .status-card-value { color: var(--danger); }

.status-card-error {
    margin-top: 8px;
    font-size: 11.5px;
    color: var(--text-secondary);
    word-break: break-word;
}

.data-note {
    margin: 0;
    font-size: 12.5px;
    color: var(--text-muted);
}

.kpi-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
}

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

.kpi-label {
    font-size: 12.5px;
    color: var(--text-secondary);
    font-weight: 600;
}

.kpi-value {
    font-size: 30px;
    font-weight: 700;
    margin-top: 8px;
    color: var(--text-primary);
}

.kpi-foot {
    margin-top: 8px;
    font-size: 12px;
    color: var(--text-muted);
}

/* ---------------- Chart card ---------------- */

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

.chart-card-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    margin-bottom: 14px;
}

.chart-card-header h2 {
    margin: 0;
    font-size: 15px;
    font-weight: 600;
}

.chart-card-sub {
    font-size: 12px;
    color: var(--text-muted);
}

.empty-state {
    padding: 32px;
    text-align: center;
    color: var(--text-muted);
    font-size: 13px;
}

/* ---------------- Filters ---------------- */

.filter-bar {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 16px 18px;
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: 14px;
}

.filter-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
    min-width: 140px;
}

.filter-field label {
    font-size: 11.5px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.filter-field input,
.filter-field select {
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 8px 10px;
    font-size: 13px;
    color: var(--text-primary);
    background: #fff;
}

.filter-actions {
    display: flex;
    gap: 8px;
}

/* ---------------- Summary row (Install Date stats) ---------------- */

.summary-row {
    display: flex;
    flex-wrap: wrap;
    gap: 28px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 16px 18px;
}

.summary-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.summary-label {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.summary-value {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
}

/* ---------------- Badges ---------------- */

.badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: 999px;
    font-size: 11.5px;
    font-weight: 600;
    white-space: nowrap;
}

.badge-success {
    background: var(--success-bg);
    color: var(--success);
}

.badge-muted {
    background: var(--pending-bg);
    color: var(--text-secondary);
}

/* ---------------- Meta row ---------------- */

.meta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 22px;
    align-items: center;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 16px 18px;
}

.meta-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.meta-label {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.meta-value {
    font-size: 13.5px;
    font-weight: 600;
    color: var(--text-primary);
}

.meta-value.ok { color: var(--success); }
.meta-value.fail { color: var(--danger); }

.meta-refresh {
    margin-left: auto;
}

.error-box {
    background: var(--danger-bg);
    border: 1px solid #fecdca;
    color: #b42318;
    border-radius: var(--radius-sm);
    padding: 12px 14px;
    font-size: 12.5px;
    word-break: break-word;
}

/* ---------------- Tables ---------------- */

.table-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.table-scroll {
    overflow: auto;
    max-height: 70vh;
}

.data-table {
    border-collapse: separate;
    border-spacing: 0;
    width: 100%;
    font-size: 12.5px;
    white-space: nowrap;
}

.data-table thead th {
    position: sticky;
    top: 0;
    background: #f8f9fc;
    color: var(--text-secondary);
    text-align: left;
    font-weight: 600;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.02em;
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
    z-index: 1;
}

.data-table tbody td {
    padding: 9px 14px;
    border-bottom: 1px solid var(--border);
    color: var(--text-primary);
}

.data-table tbody tr:nth-child(even) {
    background: #fafbfd;
}

.data-table tbody tr:hover {
    background: #eef4ff;
}

/* ---------------- Responsive ---------------- */

@media (max-width: 900px) {
    .app-shell { flex-direction: column; }
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        flex-direction: row;
        align-items: center;
        overflow-x: auto;
    }
    .nav { flex-direction: row; }
    .sidebar-footer { flex-direction: row; margin-left: auto; border-top: none; padding-top: 0; }
    .topbar { flex-direction: column; align-items: flex-start; }
    .content { padding: 20px; }
}