:root {
    --bg-dark: #0F172A;
    --bg-sidebar: #0B1120;
    --bg-card: #1E293B;
    --border-color: #334155;
    --fg-primary: #F8FAFC;
    --fg-muted: #94A3B8;
    --accent-blue: #0284C7;
    --accent-cyan: #38BDF8;
    --accent-green: #10B981;
    --accent-amber: #F59E0B;
    --accent-red: #EF4444;
    --accent-indigo: #818CF8;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--fg-primary);
    font-family: "Segoe UI", Inter, system-ui, -apple-system, sans-serif;
    font-size: 14px;
    height: 100vh;
    overflow: hidden;
}

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

/* Sidebar */
.sidebar {
    width: 260px;
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 16px 12px;
    flex-shrink: 0;
}

.brand-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 4px 8px 16px;
    border-bottom: 1px solid #1E293B;
    margin-bottom: 12px;
}

.brand-badge {
    background: linear-gradient(135deg, #0284C7, #38BDF8);
    color: #fff;
    font-weight: 800;
    font-size: 11px;
    padding: 6px 8px;
    border-radius: 6px;
}

.brand-title {
    font-size: 16px;
    color: var(--accent-cyan);
    font-weight: 700;
}

.brand-domain {
    font-size: 11px;
    color: var(--fg-muted);
}

.nav-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex: 1;
    overflow-y: auto;
}

.nav-btn {
    background: transparent;
    color: #CBD5E1;
    border: none;
    text-align: left;
    padding: 10px 12px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}

.nav-btn:hover {
    background-color: #1E293B;
    color: #FFFFFF;
}

.nav-btn.active {
    background-color: var(--accent-blue);
    color: #FFFFFF;
    font-weight: 700;
}

.sidebar-footer {
    font-size: 11px;
    color: #64748B;
    padding: 10px 8px 0;
    border-top: 1px solid #1E293B;
    line-height: 1.5;
}

/* Main Column */
.main-column {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.status-banner {
    background-color: var(--bg-card);
    border-bottom: 2px solid #475569;
    padding: 10px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 13px;
}

.banner-left {
    display: flex;
    align-items: center;
    gap: 10px;
}

.banner-sep {
    color: #475569;
}

.history-badge {
    background-color: #6D28D9;
    color: #FFFFFF;
    font-weight: 700;
    font-size: 11px;
    padding: 4px 10px;
    border-radius: 4px;
}

.hidden {
    display: none !important;
}

.page-container {
    flex: 1;
    overflow-y: auto;
    padding: 20px 24px;
}

.page {
    display: none;
    flex-direction: column;
    gap: 16px;
}

.page.active {
    display: flex;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
}

.page-header h2 {
    font-size: 20px;
    font-weight: 700;
}

.subtitle {
    color: var(--fg-muted);
    font-size: 13px;
    margin-top: 4px;
}

/* KPI Grid */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
}

.kpi-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--accent-cyan);
    border-radius: 8px;
    padding: 14px 16px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.kpi-card.accent-indigo { border-left-color: var(--accent-indigo); }
.kpi-card.accent-green { border-left-color: var(--accent-green); }
.kpi-card.accent-amber { border-left-color: var(--accent-amber); }
.kpi-card.accent-red { border-left-color: var(--accent-red); }

.kpi-title {
    color: var(--fg-muted);
    font-size: 12px;
    font-weight: 600;
}

.kpi-value {
    font-size: 20px;
    color: var(--fg-primary);
}

.kpi-sub {
    color: #64748B;
    font-size: 11px;
}

/* Panels & Forms */
.panel {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
}

.panel h3 {
    color: var(--accent-cyan);
    font-size: 14px;
    margin-bottom: 12px;
}

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

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 12px;
    flex: 1;
}

.form-row {
    display: flex;
    gap: 12px;
}

label {
    font-size: 12px;
    color: #CBD5E1;
    font-weight: 600;
}

input, select, textarea {
    background-color: #0B1120;
    color: var(--fg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 8px 10px;
    font-size: 13px;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--accent-cyan);
}

.btn-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.btn {
    border: none;
    border-radius: 6px;
    padding: 9px 16px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    color: #FFFFFF;
}

.btn.primary { background-color: var(--accent-blue); }
.btn.primary:hover { background-color: #0369A1; }
.btn.secondary { background-color: #334155; }
.btn.secondary:hover { background-color: #475569; }
.btn.danger { background-color: #DC2626; }
.btn.danger:hover { background-color: #B91C1C; }
.btn:disabled {
    background-color: #1E293B;
    color: #64748B;
    cursor: not-allowed;
}

/* Tables */
.table-wrap {
    overflow-x: auto;
    max-height: 340px;
    overflow-y: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

.data-table th {
    background-color: #0B1120;
    color: var(--accent-cyan);
    text-align: left;
    padding: 9px 10px;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
}

.data-table td {
    padding: 8px 10px;
    border-bottom: 1px solid #162032;
    color: #E2E8F0;
}

.terminal-box {
    background-color: #0B1120;
    color: var(--accent-cyan);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 12px;
    font-family: Consolas, monospace;
    font-size: 12px;
    max-height: 220px;
    overflow-y: auto;
    white-space: pre-wrap;
}

.alert-box {
    background-color: #1E293B;
    border-left: 4px solid var(--accent-amber);
    padding: 12px 16px;
    border-radius: 6px;
    font-weight: 600;
}

.info-list {
    padding-left: 18px;
    line-height: 1.7;
    color: #CBD5E1;
}

#liveChartCanvas {
    width: 100%;
    height: 200px;
    background-color: #0B1120;
    border: 1px solid var(--border-color);
    border-radius: 6px;
}

.mt-12 { margin-top: 12px; }

@media (max-width: 960px) {
    .kpi-grid, .two-col { grid-template-columns: 1fr; }
}