:root {
    --bg-primary: #f8fafc;
    --sidebar-bg: #0f172a;
    --sidebar-hover: #1e293b;
    --sidebar-active: #2563eb;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-light: #94a3b8;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --accent-light: #eff6ff;
    --success: #10b981;
    --success-light: #ecfdf5;
    --warning: #f59e0b;
    --danger: #ef4444;
    --border-color: #e2e8f0;
    --card-bg: #ffffff;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --font-sans: 'Inter', sans-serif;
}

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

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

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

/* Sidebar Styles */
.sidebar {
    width: 280px;
    background-color: var(--sidebar-bg);
    color: #ffffff;
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    z-index: 100;
    box-shadow: var(--shadow-lg);
}

.sidebar-brand {
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid #1e293b;
}

.brand-icon {
    font-size: 28px;
    color: var(--sidebar-active);
}

.brand-text {
    display: flex;
    flex-direction: column;
}

.brand-title {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.brand-subtitle {
    font-size: 11px;
    color: var(--text-light);
    font-weight: 400;
}

.sidebar-menu {
    flex-grow: 1;
    padding: 20px 12px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.menu-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 16px;
    color: #94a3b8;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
}

.menu-item:hover {
    background-color: var(--sidebar-hover);
    color: #ffffff;
}

.menu-item.active {
    background-color: var(--sidebar-active);
    color: #ffffff;
}

.menu-icon {
    font-size: 18px;
    width: 20px;
    text-align: center;
}

.sidebar-footer {
    padding: 20px;
    border-top: 1px solid #1e293b;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-avatar {
    font-size: 32px;
    color: var(--text-light);
}

.user-details {
    display: flex;
    flex-direction: column;
}

.user-name {
    font-size: 14px;
    font-weight: 600;
}

.user-role {
    font-size: 11px;
    color: var(--text-light);
}

/* Main Content Area */
.main-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    min-width: 0; /* Prevents flex children blowout */
}

/* Top Bar Styles */
.top-bar {
    background-color: #ffffff;
    height: 70px;
    padding: 0 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-color);
}

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

.top-bar-right {
    display: flex;
    align-items: center;
    gap: 24px;
}

.status-badge-container {
    display: flex;
    align-items: center;
    gap: 8px;
    background-color: var(--success-light);
    color: var(--success);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
}

.pulse-dot {
    width: 8px;
    height: 8px;
    background-color: var(--success);
    border-radius: 50%;
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
    }
    70% {
        transform: scale(1);
        box-shadow: 0 0 0 6px rgba(16, 185, 129, 0);
    }
    100% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
    }
}

.server-time {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Content Body */
.content-body {
    padding: 32px;
    flex-grow: 1;
}

/* Metric Cards Grid */
.metric-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.metric-card {
    background-color: var(--card-bg);
    border-radius: var(--radius-md);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.metric-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.metric-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.metric-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.metric-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
}

.metric-icon-box {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.metric-icon-box.blue {
    background-color: var(--accent-light);
    color: var(--accent);
}

.metric-icon-box.green {
    background-color: var(--success-light);
    color: var(--success);
}

.metric-icon-box.orange {
    background-color: #fffbeb;
    color: var(--warning);
}

.metric-icon-box.red {
    background-color: #fef2f2;
    color: var(--danger);
}

/* Dashboard Visual Sections */
.dashboard-sections {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 24px;
    margin-bottom: 32px;
}

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

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

.section-card-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.section-card-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.section-card-body {
    padding: 24px;
}

/* Tables and Lists */
.table-responsive {
    width: 100%;
    overflow-x: auto;
}

.custom-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

.custom-table th {
    background-color: #fafbfd;
    padding: 12px 16px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    border-bottom: 1px solid var(--border-color);
}

.custom-table td {
    padding: 14px 16px;
    font-size: 14px;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
}

.custom-table tbody tr:hover {
    background-color: var(--accent-light);
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 8px;
    font-size: 11px;
    font-weight: 600;
    border-radius: 4px;
}

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

.badge.danger {
    background-color: #fef2f2;
    color: var(--danger);
}

.badge.neutral {
    background-color: var(--border-color);
    color: var(--text-secondary);
}

/* Footer styling */
.app-footer {
    padding: 24px 32px;
    border-top: 1px solid var(--border-color);
    background-color: #ffffff;
    text-align: center;
    font-size: 13px;
    color: var(--text-light);
}

.app-footer a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
}

.app-footer a:hover {
    text-decoration: underline;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }
    .sidebar {
        width: 100%;
        box-shadow: none;
    }
    .sidebar-brand {
        padding: 16px;
    }
    .content-body {
        padding: 16px;
    }
    .top-bar {
        padding: 0 16px;
    }
}