/**
 * Bridge AI OS - Unified Theme CSS (single source of truth for design tokens)
 * Load this first; other CSS (nav-shared, brand-theme, etc.) use var(--primary), var(--accent), etc.
 * Policy: brand/BRAND_GUIDELINES.md
 */

/* ============================================
   CSS VARIABLES - Design Tokens (policy: BRAND_GUIDELINES.md)
   Bridge Blue #0066FF, Deep Navy #0A1628, Electric Cyan #00D4FF
   ============================================ */
:root {
    /* Policy-aligned primary */
    --bridge-blue: #0066FF;
    --deep-navy: #0A1628;
    --electric-cyan: #00D4FF;
    --primary: var(--bridge-blue);
    --primary-dark: #0052CC;
    --primary-light: #3385FF;
    --secondary: var(--electric-cyan);
    --accent: var(--electric-cyan);
    --success: #00C853;
    --warning: #FFB300;
    --danger: #FF3D57;
    --info: var(--bridge-blue);
    
    /* Backgrounds (Deep Navy, Light Navy) */
    --bg-dark: #0A1628;
    --bg-darker: #050d18;
    --bg-card: #1E3A5F;
    --bg-card-hover: #2a4a7a;
    --bg-gradient: linear-gradient(180deg, #0A1628 0%, #1E3A5F 100%);
    
    /* Text */
    --text-primary: #ffffff;
    --text-secondary: #8B95A5;
    --text-muted: #6b7280;
    
    /* Borders */
    --border-color: #1E3A5F;
    --border-primary: rgba(0, 102, 255, 0.3);
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.25);
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;
    
    /* Fonts (BRAND_GUIDELINES §6) */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

/* Optional: import policy palette for overrides — <link rel="stylesheet" href="/css/brand-theme.css"> */

/* ============================================
   BASE STYLES
   ============================================ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--space-md);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--space-md);
    color: var(--text-secondary);
}

a {
    color: var(--primary-light);
    text-decoration: none;
    transition: color var(--transition-fast);
}

/* Subtle guided-tour highlight */
.tour-highlight {
    position: relative;
    z-index: 1;
    box-shadow: 0 0 0 2px rgba(0, 102, 255, 0.6), 0 0 20px rgba(0, 102, 255, 0.4);
    animation: tourPulse 1.6s ease-in-out infinite;
}

@keyframes tourPulse {
    0% { box-shadow: 0 0 0 0 rgba(0, 102, 255, 0.7), 0 0 16px rgba(0, 212, 255, 0.25); }
    50% { box-shadow: 0 0 0 6px rgba(0, 102, 255, 0), 0 0 26px rgba(0, 212, 255, 0.35); }
    100% { box-shadow: 0 0 0 0 rgba(0, 102, 255, 0), 0 0 16px rgba(0, 212, 255, 0.25); }
}

a:hover {
    color: var(--primary);
}

.mono {
    font-family: var(--font-mono);
}

/* ============================================
   GRADIENT TEXT
   ============================================ */
.gradient-text {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 50%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ============================================
   LAYOUT
   ============================================ */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-xl);
}

.section {
    padding: var(--space-2xl) 0;
}

.grid {
    display: grid;
    gap: var(--space-lg);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .container { padding: var(--space-md); }
}

/* ============================================
   CARDS
   ============================================ */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--space-lg);
    transition: all var(--transition-normal);
}

.card:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-md);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.card-body {
    color: var(--text-secondary);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    min-height: 44px; /* touch target WCAG 2.1 */
    border-radius: var(--radius-lg);
    font-weight: 500;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

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

.btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--primary);
    color: var(--primary-light);
}

.btn-outline:hover {
    background: rgba(99, 102, 241, 0.1);
}

.btn-lg {
    padding: var(--space-md) var(--space-xl);
    font-size: 1rem;
}

.btn-sm {
    padding: var(--space-xs) var(--space-md);
    font-size: 0.75rem;
}

/* ============================================
   STATUS INDICATORS
   ============================================ */
.status {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.875rem;
}

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

.status-dot.online { background: var(--success); box-shadow: 0 0 10px rgba(34, 197, 94, 0.5); }
.status-dot.offline { background: var(--danger); box-shadow: 0 0 10px rgba(239, 68, 68, 0.5); }
.status-dot.warning { background: var(--warning); box-shadow: 0 0 10px rgba(245, 158, 11, 0.5); }
.status-dot.processing { background: var(--info); box-shadow: 0 0 10px rgba(59, 130, 246, 0.5); }

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.7; transform: scale(1.2); }
}

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(10, 10, 15, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    padding: var(--space-md) var(--space-xl);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 700;
    font-size: 1.25rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.nav-link {
    color: var(--text-secondary);
    font-size: 0.875rem;
    transition: color var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
    color: var(--primary-light);
}

@media (max-width: 768px) {
    .nav-links { display: none; }
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--bg-darker);
    border-top: 1px solid var(--border-color);
    padding: var(--space-lg) var(--space-xl);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* ============================================
   FORMS
   ============================================ */
.input {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-darker);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-size: 0.875rem;
    transition: all var(--transition-fast);
}

.input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.input::placeholder {
    color: var(--text-muted);
}

/* ============================================
   BADGES
   ============================================ */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-xs) var(--space-sm);
    background: rgba(99, 102, 241, 0.2);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--primary-light);
}

.badge-success {
    background: rgba(34, 197, 94, 0.2);
    border-color: rgba(34, 197, 94, 0.3);
    color: var(--success);
}

.badge-warning {
    background: rgba(245, 158, 11, 0.2);
    border-color: rgba(245, 158, 11, 0.3);
    color: var(--warning);
}

.badge-danger {
    background: rgba(239, 68, 68, 0.2);
    border-color: rgba(239, 68, 68, 0.3);
    color: var(--danger);
}

/* ============================================
   TABLES
   ============================================ */
.table {
    width: 100%;
    border-collapse: collapse;
}

.table th, .table td {
    padding: var(--space-sm) var(--space-md);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

/* ============================================
   UTILITIES
   ============================================ */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-sm { font-size: 0.875rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }

.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-danger { color: var(--danger); }

.mt-1 { margin-top: var(--space-sm); }
.mt-2 { margin-top: var(--space-md); }
.mt-3 { margin-top: var(--space-lg); }
.mt-4 { margin-top: var(--space-xl); }

.mb-1 { margin-bottom: var(--space-sm); }
.mb-2 { margin-bottom: var(--space-md); }
.mb-3 { margin-bottom: var(--space-lg); }
.mb-4 { margin-bottom: var(--space-xl); }

.p-1 { padding: var(--space-sm); }
.p-2 { padding: var(--space-md); }
.p-3 { padding: var(--space-lg); }
.p-4 { padding: var(--space-xl); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: var(--space-sm); }
.gap-2 { gap: var(--space-md); }
.gap-3 { gap: var(--space-lg); }

.hidden { display: none; }
.visible { visibility: visible; }
.invisible { visibility: hidden; }

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideIn {
    from { opacity: 0; transform: translateX(-20px); }
    to { opacity: 1; transform: translateX(0); }
}

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

.animate-fadeIn { animation: fadeIn 0.3s ease; }
.animate-slideIn { animation: slideIn 0.3s ease; }
.animate-spin { animation: spin 1s linear infinite; }

/* ============================================
   SCROLLBAR
   ============================================ */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-darker);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

/* ============================================
   SELECTION
   ============================================ */
::selection {
    background: rgba(99, 102, 241, 0.3);
    color: white;
}