/* My2Open - Unified Responsive Styles */
/* Copyright 2025 My2Open Authors */

/* ============================================================================
   CSS Variables & Themes
   ============================================================================ */

:root {
    /* Colors - Light Theme */
    --color-primary: #3b82f6;
    --color-primary-hover: #2563eb;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    --color-info: #06b6d4;
    
    /* Background */
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    
    /* Text */
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-tertiary: #9ca3af;
    --text-inverse: #ffffff;
    
    /* Border */
    --border-color: #e5e7eb;
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --border-radius-sm: 6px;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
    
    /* Layout */
    --navbar-height: 60px;
    --sidebar-width: 240px;
    --container-max-width: 1400px;
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: #1f2937;
    --bg-secondary: #111827;
    --bg-tertiary: #374151;
    
    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
    --text-tertiary: #9ca3af;
    
    --border-color: #374151;
}

/* ============================================================================
   Reset & Base Styles
   ============================================================================ */

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-gradient);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ============================================================================
   Navigation
   ============================================================================ */

.navbar {
    background: var(--bg-primary);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
    height: var(--navbar-height);
}

.nav-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
    font-size: 1.25rem;
}

.brand-icon {
    font-size: 1.5rem;
}

.brand-text {
    color: var(--color-primary);
}

.brand-subtitle {
    color: var(--text-tertiary);
    font-size: 0.75rem;
    font-weight: 400;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-item a {
    color: var(--text-secondary);
    text-decoration: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
    font-weight: 500;
}

.nav-item a:hover {
    color: var(--color-primary);
    background: var(--bg-secondary);
}

.nav-item.active a {
    color: var(--color-primary);
    background: var(--bg-secondary);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.lang-select {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background: var(--bg-primary);
    color: var(--text-primary);
    cursor: pointer;
    font-size: 0.875rem;
}

.btn-icon {
    width: 36px;
    height: 36px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background: var(--bg-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.btn-icon:hover {
    background: var(--bg-secondary);
    transform: scale(1.05);
}

.mobile-menu-toggle {
    display: none;
}

/* ============================================================================
   Main Content
   ============================================================================ */

.main-content {
    flex: 1;
    padding: var(--spacing-lg);
}

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
}

.page-header {
    background: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-lg);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.page-header h1 {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--text-primary);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    font-weight: 500;
}

.status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

.status-online {
    background: var(--color-success);
}

.status-offline {
    background: var(--color-danger);
}

.status-degraded {
    background: var(--color-warning);
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.last-update {
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

/* ============================================================================
   Cards & Grids
   ============================================================================ */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.stat-card {
    background: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    transition: transform var(--transition-fast);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.stat-icon {
    font-size: 2.5rem;
    flex-shrink: 0;
}

.stat-content {
    flex: 1;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-xs);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-unit {
    font-size: 1rem;
    color: var(--text-tertiary);
    margin-left: var(--spacing-xs);
}

.stat-change {
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
}

.stat-change.positive {
    color: var(--color-success);
}

.stat-change.negative {
    color: var(--color-danger);
}

.stat-subtitle {
    color: var(--text-tertiary);
    font-size: 0.75rem;
    margin-top: var(--spacing-xs);
}

.stat-progress {
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: 2px;
    margin-top: var(--spacing-sm);
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: var(--color-primary);
    transition: width var(--transition-normal);
}

.dashboard-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.card {
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    margin-bottom: var(--spacing-lg);
}

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

.card-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.card-body {
    padding: var(--spacing-lg);
}

/* ============================================================================
   Charts
   ============================================================================ */

.chart-container {
    position: relative;
    min-height: 250px;
}

.chart-container canvas {
    max-width: 100%;
}

.chart-legend {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    margin-top: var(--spacing-md);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.legend-color {
    width: 16px;
    height: 16px;
    border-radius: 4px;
}

.legend-value {
    font-weight: 600;
    color: var(--text-primary);
}

.nat-types-list {
    margin-top: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.nat-type-item {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-sm);
    background: var(--bg-secondary);
    border-radius: var(--border-radius-sm);
}

.nat-type-percent {
    font-weight: 600;
    color: var(--color-primary);
}

.performance-metrics {
    display: flex;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    justify-content: space-around;
}

.metric-item {
    text-align: center;
}

.metric-item span:first-child {
    display: block;
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-xs);
}

.metric-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
}

/* ============================================================================
   Tables
   ============================================================================ */

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

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table thead {
    background: var(--bg-secondary);
}

.data-table th {
    padding: var(--spacing-md);
    text-align: left;
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.data-table td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    font-size: 0.875rem;
}

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

.data-table code {
    background: var(--bg-tertiary);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.875rem;
}

.text-center {
    text-align: center;
}

/* ============================================================================
   Badges
   ============================================================================ */

.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-p2p {
    background: #d1fae5;
    color: #065f46;
}

.badge-relay {
    background: #fef3c7;
    color: #92400e;
}

.badge-active {
    background: #dbeafe;
    color: #1e40af;
}

.badge-online {
    background: #d1fae5;
    color: #065f46;
}

.badge-offline {
    background: #fee2e2;
    color: #991b1b;
}

/* ============================================================================
   System Gauges
   ============================================================================ */

.gauge-chart {
    text-align: center;
    padding: var(--spacing-xl) 0;
}

.gauge-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
}

.gauge-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-top: var(--spacing-sm);
}

.uptime-display {
    text-align: center;
    padding: var(--spacing-xl) 0;
}

.uptime-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-success);
}

.uptime-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-top: var(--spacing-sm);
}

/* ============================================================================
   Buttons & Form Controls
   ============================================================================ */

.btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--border-radius);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.btn-primary {
    background: var(--color-primary);
    color: var(--text-inverse);
}

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

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.875rem;
}

.btn-link {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.btn-link:hover {
    color: var(--color-primary-hover);
    text-decoration: underline;
}

.select-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.875rem;
}

/* ============================================================================
   Footer
   ============================================================================ */

.footer {
    background: var(--bg-primary);
    padding: var(--spacing-lg);
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-top: auto;
}

.footer p {
    margin: var(--spacing-xs) 0;
}

/* ============================================================================
   Responsive Design - Mobile/H5
   ============================================================================ */

@media (max-width: 768px) {
    /* Mobile Navigation */
    .mobile-menu-toggle {
        display: block;
    }
    
    .nav-menu {
        position: absolute;
        top: var(--navbar-height);
        left: 0;
        right: 0;
        background: var(--bg-primary);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-lg);
        display: none;
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .brand-subtitle {
        display: none;
    }
    
    /* Stats Grid */
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .dashboard-row {
        grid-template-columns: 1fr;
    }
    
    /* Cards */
    .card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
    
    /* Tables */
    .data-table {
        font-size: 0.75rem;
    }
    
    .data-table th,
    .data-table td {
        padding: var(--spacing-sm);
    }
    
    /* Performance Metrics */
    .performance-metrics {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    /* Stat Cards */
    .stat-card {
        flex-direction: column;
        text-align: center;
    }
    
    .stat-value {
        font-size: 1.5rem;
    }
    
    .header-content {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
    
    .main-content {
        padding: var(--spacing-md);
    }
    
    .page-header h1 {
        font-size: 1.5rem;
    }
    
    .stat-value {
        font-size: 1.25rem;
    }
    
    .chart-legend {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* ============================================================================
   Utility Classes
   ============================================================================ */

.hidden {
    display: none !important;
}

.mt-sm {
    margin-top: var(--spacing-sm);
}

.mt-md {
    margin-top: var(--spacing-md);
}

.mt-lg {
    margin-top: var(--spacing-lg);
}

.mb-sm {
    margin-bottom: var(--spacing-sm);
}

.mb-md {
    margin-bottom: var(--spacing-md);
}

.mb-lg {
    margin-bottom: var(--spacing-lg);
}

.gap-sm {
    gap: var(--spacing-sm);
}

.gap-md {
    gap: var(--spacing-md);
}

.gap-lg {
    gap: var(--spacing-lg);
}