:root {
    --bg-dark: #0b0f19;
    --bg-card: rgba(22, 30, 49, 0.75);
    --bg-card-border: rgba(255, 255, 255, 0.08);
    --accent-blue: #3b82f6;
    --accent-teal: #14b8a6;
    --accent-purple: #8b5cf6;
    --accent-red: #ef4444;
    --accent-green: #10b981;
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --font-family: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
    overflow-x: hidden;
}

/* App Container Layout */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background: rgba(15, 23, 42, 0.9);
    border-right: 1px solid var(--bg-card-border);
    backdrop-filter: blur(12px);
    display: flex;
    flex-direction: column;
    padding: 1.5rem 1rem;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 2rem;
    padding: 0 0.5rem;
}

.logo-icon {
    font-size: 1.8rem;
}

.brand-text h2 {
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, #60a5fa, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.badge {
    font-size: 0.65rem;
    background: rgba(59, 130, 246, 0.2);
    color: #60a5fa;
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 600;
}

.nav-menu {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    flex: 1;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: left;
}

.nav-item:hover, .nav-item.active {
    background: rgba(59, 130, 246, 0.15);
    color: #ffffff;
    border-left: 3px solid var(--accent-blue);
}

.system-status {
    background: rgba(30, 41, 59, 0.5);
    padding: 1rem;
    border-radius: 8px;
    border: 1px solid var(--bg-card-border);
    font-size: 0.8rem;
}

.status-title {
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    font-size: 0.7rem;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.25rem;
    color: var(--text-secondary);
}

.status-indicator .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-green);
    box-shadow: 0 0 8px var(--accent-green);
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
}

.top-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.header-title h1 {
    font-size: 1.75rem;
    font-weight: 700;
}

.subtitle {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.header-actions {
    display: flex;
    gap: 0.75rem;
}

/* Buttons */
.btn {
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-blue), #2563eb);
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(37, 99, 235, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
    border: 1px solid var(--bg-card-border);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
}

/* Metrics Grid */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.25rem;
    margin-bottom: 2rem;
}

.metric-card {
    background: var(--bg-card);
    border: 1px solid var(--bg-card-border);
    backdrop-filter: blur(12px);
    border-radius: 12px;
    padding: 1.25rem;
}

.metric-card.alert {
    border-color: rgba(239, 68, 68, 0.4);
    background: rgba(239, 68, 68, 0.05);
}

.metric-header {
    display: flex;
    justify-content: space-between;
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.metric-value {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.metric-trend {
    font-size: 0.8rem;
    font-weight: 500;
}

.metric-trend.positive { color: var(--accent-green); }
.metric-trend.negative { color: var(--accent-red); }

/* Layout Grids & Cards */
.grid-2col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--bg-card-border);
    backdrop-filter: blur(12px);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.25rem;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Tables */
.table-responsive {
    overflow-x: auto;
}

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

.data-table th {
    text-align: left;
    padding: 0.75rem 1rem;
    color: var(--text-muted);
    border-bottom: 1px solid var(--bg-card-border);
    font-weight: 600;
}

.data-table td {
    padding: 0.9rem 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

/* Tags & Badges */
.tag {
    padding: 3px 8px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
}

.tag-danger { background: rgba(239, 68, 68, 0.2); color: var(--accent-red); }
.tag-success { background: rgba(16, 185, 129, 0.2); color: var(--accent-green); }
.tag-info { background: rgba(59, 130, 246, 0.2); color: #60a5fa; }

/* Anomaly Feed */
.anomaly-item {
    background: rgba(239, 68, 68, 0.08);
    border-left: 4px solid var(--accent-red);
    padding: 1rem;
    border-radius: 6px;
    margin-bottom: 0.75rem;
}

.anomaly-title {
    font-weight: 600;
    color: #fca5a5;
    margin-bottom: 0.25rem;
}

.anomaly-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Briefing Box */
.briefing-box {
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--bg-card-border);
    padding: 1.5rem;
    border-radius: 8px;
    line-height: 1.7;
    white-space: pre-wrap;
}

/* Chat Interface */
.chat-card {
    display: flex;
    flex-direction: column;
    height: 500px;
}

.chat-history {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding-right: 0.5rem;
    margin-bottom: 1rem;
}

.chat-bubble {
    max-width: 80%;
    padding: 0.9rem 1.2rem;
    border-radius: 12px;
    font-size: 0.95rem;
    line-height: 1.5;
}

.chat-bubble.agent {
    background: rgba(59, 130, 246, 0.15);
    border: 1px solid rgba(59, 130, 246, 0.3);
    align-self: flex-start;
    border-bottom-left-radius: 2px;
}

.chat-bubble.user {
    background: linear-gradient(135deg, var(--accent-blue), #2563eb);
    color: #fff;
    align-self: flex-end;
    border-bottom-right-radius: 2px;
}

.chat-input-row {
    display: flex;
    gap: 0.75rem;
}

.chat-input-row input {
    flex: 1;
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid var(--bg-card-border);
    padding: 0.75rem 1rem;
    border-radius: 8px;
    color: #fff;
    font-family: inherit;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active { display: flex; }

.modal-content {
    background: var(--bg-dark);
    border: 1px solid var(--bg-card-border);
    border-radius: 12px;
    width: 450px;
    padding: 1.5rem;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.25rem;
}

.close-btn {
    cursor: pointer;
    font-size: 1.5rem;
    color: var(--text-muted);
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.form-control {
    width: 100%;
    background: rgba(30, 41, 59, 0.6);
    border: 1px solid var(--bg-card-border);
    padding: 0.6rem 0.8rem;
    border-radius: 6px;
    color: #fff;
    font-family: inherit;
}

.btn-block { width: 100%; justify-content: center; }