/* ============================================================
   ModelGate Monitoring — Design System
   Mirrors the main dashboard design language (Inter, emerald)
   ============================================================ */

:root {
    /* --- Colors (matches dashboard/static/css/style.css) --- */
    --primary: #059669;
    --primary-dark: #047857;
    --primary-light: #ecfdf5;

    --success: #22c55e;
    --success-dark: #16a34a;
    --success-light: #dcfce7;
    --success-text: #166534;

    --danger: #ef4444;
    --danger-dark: #dc2626;
    --danger-light: #fee2e2;
    --danger-text: #991b1b;

    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --warning-text: #92400e;

    /* --- Surfaces --- */
    --bg: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-hover: #e2e8f0;

    /* --- Text --- */
    --text: #0f172a;
    --text-secondary: #475569;
    --text-tertiary: #94a3b8;

    /* --- Borders --- */
    --border: #e2e8f0;
    --border-light: #f1f5f9;

    /* --- Shadows --- */
    --shadow-xs: 0 1px 2px 0 rgba(0,0,0,0.03);
    --shadow-sm: 0 1px 2px -1px rgba(0,0,0,0.03), 0 2px 6px 0 rgba(0,0,0,0.05);
    --shadow-md: 0 2px 4px -2px rgba(0,0,0,0.03), 0 6px 12px -2px rgba(0,0,0,0.06);
    --shadow-lg: 0 4px 6px -2px rgba(0,0,0,0.03), 0 12px 20px -4px rgba(0,0,0,0.08);

    /* --- Type Scale --- */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 2rem;

    /* --- Radii --- */
    --radius-sm: 0.375rem;
    --radius: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* --- Fonts --- */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', Monaco, 'Cascadia Code', 'Courier New', monospace;

    /* --- Accent Colors (stat cards) --- */
    --accent-green: #10b981;
    --accent-green-light: #ecfdf5;
    --accent-blue: #3b82f6;
    --accent-blue-light: #eff6ff;
    --accent-orange: #f59e0b;
    --accent-orange-light: #fffbeb;
    --accent-purple: #8b5cf6;
    --accent-purple-light: #f5f3ff;
    --accent-red: #ef4444;
    --accent-red-light: #fef2f2;

    /* --- Transitions --- */
    --transition: 150ms ease;

    /* --- Layout --- */
    --sidebar-width: 240px;
}

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

body {
    font-family: var(--font-sans);
    background: var(--bg-secondary);
    color: var(--text);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* ==================== APP LAYOUT ==================== */

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

/* ==================== SIDEBAR ==================== */

.sidebar {
    width: var(--sidebar-width);
    background: var(--bg);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    transition: transform 0.2s ease;
}

.sidebar-header {
    padding: 20px 20px 16px;
    border-bottom: 1px solid var(--border);
}

.sidebar-header h1 {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--text);
    line-height: 1.2;
}

.sidebar-header .subtitle {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
    margin-top: 2px;
}

.sidebar-nav {
    flex: 1;
    padding: 12px 8px;
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    border-radius: var(--radius);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: var(--text-sm);
    font-weight: 500;
    transition: all var(--transition);
    cursor: pointer;
    margin-bottom: 2px;
}

.nav-item:hover {
    background: var(--bg-tertiary);
    color: var(--text);
}

.nav-item.active {
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 600;
}

.nav-item .nav-icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    opacity: 0.7;
}

.nav-item.active .nav-icon {
    opacity: 1;
}

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: var(--text-xs);
}

.sidebar-footer .admin-name {
    color: var(--text-secondary);
    font-weight: 500;
}

.sidebar-footer a {
    color: var(--text-tertiary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition);
}

.sidebar-footer a:hover {
    color: var(--danger);
}

/* Mobile sidebar toggle */
.sidebar-toggle {
    display: none;
    position: fixed;
    top: 12px;
    left: 12px;
    z-index: 200;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 8px 10px;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    font-size: 18px;
    line-height: 1;
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.3);
    z-index: 99;
}

/* ==================== MAIN CONTENT ==================== */

.content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
}

.content-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 50;
}

.content-header h2 {
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--text);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.last-refresh {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
    font-weight: 500;
}

.next-refresh {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
    opacity: 0.7;
}

.page-content {
    padding: 24px;
    max-width: 1400px;
}

/* ==================== BUTTONS ==================== */

.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: var(--radius);
    font-size: var(--text-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    border: 1px solid transparent;
    font-family: var(--font-sans);
    line-height: 1.5;
}

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

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

.btn-secondary {
    background: var(--bg);
    color: var(--text-secondary);
    border-color: var(--border);
}

.btn-secondary:hover {
    background: var(--bg-tertiary);
    color: var(--text);
}

/* Refresh button spinner */
.refresh-icon {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

.btn-refresh.loading .refresh-icon {
    animation: spin 0.8s linear infinite;
}

.btn-refresh.loading {
    opacity: 0.7;
    pointer-events: none;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* ==================== SECTION ==================== */

.section {
    margin-bottom: 24px;
}

.section-title {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 12px;
}

/* ==================== KPI CARDS ==================== */

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

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

.kpi-card:hover {
    box-shadow: var(--shadow-sm);
}

.kpi-label {
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 6px;
}

.kpi-value {
    font-size: var(--text-2xl);
    font-weight: 700;
    color: var(--text);
    line-height: 1.2;
    font-variant-numeric: tabular-nums;
}

.kpi-sub {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
    margin-top: 4px;
    font-weight: 500;
}

.kpi-sub .positive {
    color: var(--success-text);
}

.kpi-sub .negative {
    color: var(--danger-text);
}

/* Colored KPI accent strip */
.kpi-card[data-accent="green"] { border-top: 3px solid var(--accent-green); }
.kpi-card[data-accent="blue"] { border-top: 3px solid var(--accent-blue); }
.kpi-card[data-accent="orange"] { border-top: 3px solid var(--accent-orange); }
.kpi-card[data-accent="purple"] { border-top: 3px solid var(--accent-purple); }
.kpi-card[data-accent="red"] { border-top: 3px solid var(--accent-red); }

/* ==================== STATUS CARDS ==================== */

.status-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
}

.status-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 16px;
    box-shadow: var(--shadow-xs);
}

.status-label {
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 8px;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: var(--text-sm);
    font-weight: 600;
}

.status-detail {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
    margin-top: 6px;
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
    flex-shrink: 0;
    background: var(--text-tertiary);
}

.dot.green { background: var(--success); }
.dot.red { background: var(--danger); }
.dot.yellow { background: var(--warning); }

/* ==================== CHARTS ==================== */

.chart-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

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

.chart-card h3 {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.chart-card canvas {
    width: 100% !important;
    max-height: 240px;
}

/* ==================== TABLES ==================== */

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

.table-card-header {
    padding: 16px 20px 12px;
    border-bottom: 1px solid var(--border-light);
}

.table-card-header h3 {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-secondary);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--text-sm);
}

.data-table th {
    background: var(--bg-secondary);
    font-weight: 600;
    text-align: left;
    padding: 10px 16px;
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-tertiary);
    border-bottom: 1px solid var(--border);
}

.data-table td {
    padding: 10px 16px;
    border-bottom: 1px solid var(--border-light);
    color: var(--text-secondary);
}

.data-table tr:last-child td {
    border-bottom: none;
}

.data-table tr:hover td {
    background: var(--bg-secondary);
}

.data-table .text-right {
    text-align: right;
    font-variant-numeric: tabular-nums;
}

.data-table .text-mono {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
}

.table-wrap {
    overflow-x: auto;
}

/* ==================== STAT GRID (key-value pairs) ==================== */

.stat-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.stat-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 16px;
    border-bottom: 1px solid var(--border-light);
    font-size: var(--text-sm);
}

.stat-item:nth-child(odd) {
    border-right: 1px solid var(--border-light);
}

.stat-key {
    color: var(--text-tertiary);
    font-weight: 500;
}

.stat-val {
    font-weight: 600;
    color: var(--text);
    font-variant-numeric: tabular-nums;
}

/* ==================== TWO-COLUMN LAYOUT ==================== */

.two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

/* ==================== FUNNEL ==================== */

.funnel {
    display: flex;
    align-items: stretch;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xs);
}

.funnel-step {
    flex: 1;
    padding: 20px 16px;
    text-align: center;
    border-right: 1px solid var(--border-light);
    position: relative;
}

.funnel-step:last-child { border-right: none; }

.funnel-count {
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--text);
    font-variant-numeric: tabular-nums;
}

.funnel-label {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
    margin-top: 4px;
    font-weight: 500;
}

.funnel-pct {
    font-size: var(--text-xs);
    color: var(--primary);
    margin-top: 2px;
    font-weight: 600;
}

.funnel-arrow {
    position: absolute;
    right: -8px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-tertiary);
    font-size: 14px;
    z-index: 1;
}

/* ==================== HEATMAP ==================== */

.heatmap-wrap {
    overflow-x: auto;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 16px;
    box-shadow: var(--shadow-xs);
}

.heatmap-table {
    border-collapse: collapse;
    font-size: var(--text-xs);
    width: 100%;
}

.heatmap-table th,
.heatmap-table td {
    padding: 4px 6px;
    text-align: center;
    min-width: 28px;
}

.heatmap-table th {
    font-weight: 600;
    color: var(--text-tertiary);
}

.heatmap-cell {
    border-radius: 3px;
    min-width: 28px;
    min-height: 22px;
    font-variant-numeric: tabular-nums;
}

/* ==================== ANOMALIES ==================== */

.anomalies-list {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xs);
}

.anomaly-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-light);
    font-size: var(--text-sm);
}

.anomaly-item:last-child { border-bottom: none; }
.anomaly-icon { font-size: 16px; flex-shrink: 0; }
.anomaly-msg { flex: 1; color: var(--text-secondary); }
.anomaly-time { font-size: var(--text-xs); color: var(--text-tertiary); flex-shrink: 0; }
.anomaly-empty { padding: 20px; text-align: center; color: var(--text-tertiary); font-size: var(--text-sm); }
.severity-error .anomaly-icon { color: var(--danger); }
.severity-warning .anomaly-icon { color: var(--warning); }

/* ==================== TAG LIST ==================== */

.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.tag {
    padding: 4px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 999px;
    font-size: var(--text-xs);
    color: var(--text-secondary);
    font-weight: 500;
}

.tag-empty {
    color: var(--text-tertiary);
    font-size: var(--text-sm);
    padding: 8px 0;
}

/* ==================== BADGES ==================== */

.badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: var(--text-xs);
    font-weight: 600;
    line-height: 1.5;
}

.badge-green { background: var(--success-light); color: var(--success-text); }
.badge-red { background: var(--danger-light); color: var(--danger-text); }
.badge-yellow { background: var(--warning-light); color: var(--warning-text); }

/* ==================== EMPTY STATE ==================== */

.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-tertiary);
    font-size: var(--text-sm);
}

/* ==================== LOGIN PAGE ==================== */

body.login-body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 16px;
    background: var(--bg-secondary);
}

.login-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    padding: 32px;
    width: 100%;
    max-width: 380px;
}

.login-card h1 {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--text);
    margin-bottom: 4px;
}

.login-card .login-subtitle {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    margin-bottom: 24px;
}

.login-card label {
    display: block;
    font-size: var(--text-xs);
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.login-card input[type="text"],
.login-card input[type="password"] {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: var(--text-sm);
    font-family: var(--font-sans);
    margin-bottom: 16px;
    outline: none;
    box-sizing: border-box;
    color: var(--text);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.login-card input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(5, 150, 105, 0.1);
}

.login-card button {
    width: 100%;
    padding: 10px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    font-size: var(--text-sm);
    font-weight: 600;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: background var(--transition);
}

.login-card button:hover {
    background: var(--primary-dark);
}

.error-msg {
    background: var(--danger-light);
    color: var(--danger-text);
    font-size: var(--text-sm);
    padding: 8px 12px;
    border-radius: var(--radius);
    margin-bottom: 16px;
}

/* ==================== RESPONSIVE ==================== */

@media (max-width: 1024px) {
    .chart-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .sidebar-overlay.open {
        display: block;
    }

    .sidebar-toggle {
        display: block;
    }

    .content {
        margin-left: 0;
    }

    .content-header {
        padding-left: 56px;
    }

    .two-col,
    .chart-grid {
        grid-template-columns: 1fr;
    }

    .kpi-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .stat-item:nth-child(odd) {
        border-right: none;
    }

    .funnel {
        flex-direction: column;
    }

    .funnel-step {
        border-right: none;
        border-bottom: 1px solid var(--border-light);
    }

    .funnel-step:last-child { border-bottom: none; }
    .funnel-arrow { display: none; }

    .page-content {
        padding: 16px;
    }
}