/**
 * BITCORE Dashboard Design System
 * Modern card-based layout with dark theme
 * @version 1.0.0
 */

/* ========================================
   CSS Custom Properties (Design Tokens)
   ======================================== */
:root {
    /* Colors - Dark Theme */
    --bf-bg-primary: #0a0a0f;
    --bf-bg-secondary: #12121a;
    --bf-bg-tertiary: #1a1a25;
    --bf-bg-elevated: #22222e;
    --bf-bg-overlay: rgba(0, 0, 0, 0.8);

    /* Text Colors */
    --bf-text-primary: #f0f0f5;
    --bf-text-secondary: #a0a0b0;
    --bf-text-muted: #6a6a7a;
    --bf-text-inverse: #0a0a0f;

    /* Accent Colors */
    --bf-accent-primary: #00d4aa;
    --bf-accent-secondary: #6366f1;
    --bf-accent-tertiary: #8b5cf6;
    --bf-accent-warning: #f59e0b;
    --bf-accent-danger: #ef4444;
    --bf-accent-success: #22c55e;

    /* Border Colors */
    --bf-border-primary: #2a2a3a;
    --bf-border-secondary: #3a3a4a;
    --bf-border-accent: rgba(0, 212, 170, 0.3);

    /* Gradients */
    --bf-gradient-primary: linear-gradient(135deg, var(--bf-accent-primary), var(--bf-accent-secondary));
    --bf-gradient-secondary: linear-gradient(135deg, var(--bf-accent-secondary), var(--bf-accent-tertiary));
    --bf-gradient-card: linear-gradient(135deg, var(--bf-bg-secondary), var(--bf-bg-tertiary));

    /* Typography */
    --bf-font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    --bf-font-mono: 'SF Mono', 'Fira Code', 'Monaco', 'Consolas', monospace;

    /* Font Sizes */
    --bf-text-xs: 0.7rem;
    --bf-text-sm: 0.8rem;
    --bf-text-md: 0.9rem;
    --bf-text-lg: 1rem;
    --bf-text-xl: 1.25rem;
    --bf-text-2xl: 1.5rem;
    --bf-text-3xl: 2rem;

    /* Spacing */
    --bf-space-xs: 4px;
    --bf-space-sm: 8px;
    --bf-space-md: 16px;
    --bf-space-lg: 24px;
    --bf-space-xl: 32px;
    --bf-space-2xl: 48px;

    /* Border Radius */
    --bf-radius-sm: 4px;
    --bf-radius-md: 8px;
    --bf-radius-lg: 12px;
    --bf-radius-xl: 16px;
    --bf-radius-full: 9999px;

    /* Shadows */
    --bf-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --bf-shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --bf-shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.4);
    --bf-shadow-glow: 0 0 20px rgba(0, 212, 170, 0.2);

    /* Transitions */
    --bf-transition-fast: 150ms ease;
    --bf-transition-normal: 250ms ease;
    --bf-transition-slow: 400ms ease;

    /* Z-Index Scale */
    --bf-z-dropdown: 100;
    --bf-z-sticky: 200;
    --bf-z-modal: 300;
    --bf-z-toast: 400;
}

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

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

body {
    font-family: var(--bf-font-sans);
    background: var(--bf-bg-primary);
    color: var(--bf-text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* ========================================
   Card Component
   ======================================== */
.bf-card {
    background: var(--bf-bg-secondary);
    border: 1px solid var(--bf-border-primary);
    border-radius: var(--bf-radius-xl);
    overflow: hidden;
    transition: all var(--bf-transition-normal);
}

.bf-card:hover {
    border-color: var(--bf-border-secondary);
}

.bf-card-header {
    padding: var(--bf-space-md) var(--bf-space-lg);
    background: var(--bf-bg-tertiary);
    border-bottom: 1px solid var(--bf-border-primary);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.bf-card-title {
    font-size: var(--bf-text-lg);
    font-weight: 600;
}

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

.bf-card-footer {
    padding: var(--bf-space-md) var(--bf-space-lg);
    border-top: 1px solid var(--bf-border-primary);
    background: var(--bf-bg-tertiary);
}

/* Card Variants */
.bf-card.glow {
    border-color: var(--bf-accent-primary);
    box-shadow: var(--bf-shadow-glow);
}

.bf-card.interactive {
    cursor: pointer;
}

.bf-card.interactive:hover {
    transform: translateY(-2px);
    border-color: var(--bf-accent-primary);
}

/* ========================================
   Button Component
   ======================================== */
.bf-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--bf-space-sm);
    padding: var(--bf-space-sm) var(--bf-space-md);
    border-radius: var(--bf-radius-md);
    border: 1px solid var(--bf-border-primary);
    background: var(--bf-bg-tertiary);
    color: var(--bf-text-primary);
    font-family: var(--bf-font-sans);
    font-size: var(--bf-text-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--bf-transition-fast);
    text-decoration: none;
    white-space: nowrap;
}

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

.bf-btn:active {
    transform: scale(0.98);
}

.bf-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Button Variants */
.bf-btn-primary {
    background: var(--bf-accent-primary);
    border-color: var(--bf-accent-primary);
    color: var(--bf-text-inverse);
}

.bf-btn-primary:hover {
    background: #00eabb;
    border-color: #00eabb;
}

.bf-btn-secondary {
    background: var(--bf-accent-secondary);
    border-color: var(--bf-accent-secondary);
    color: white;
}

.bf-btn-secondary:hover {
    background: #7c7ff7;
}

.bf-btn-danger {
    background: var(--bf-accent-danger);
    border-color: var(--bf-accent-danger);
    color: white;
}

.bf-btn-outline {
    background: transparent;
    border-color: var(--bf-accent-primary);
    color: var(--bf-accent-primary);
}

.bf-btn-outline:hover {
    background: var(--bf-accent-primary);
    color: var(--bf-text-inverse);
}

/* Button Sizes */
.bf-btn-sm {
    padding: var(--bf-space-xs) var(--bf-space-sm);
    font-size: var(--bf-text-xs);
}

.bf-btn-lg {
    padding: var(--bf-space-md) var(--bf-space-lg);
    font-size: var(--bf-text-md);
}

.bf-btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: var(--bf-radius-md);
}

/* ========================================
   Form Components
   ======================================== */
.bf-form-group {
    margin-bottom: var(--bf-space-md);
}

.bf-form-label {
    display: block;
    margin-bottom: var(--bf-space-xs);
    font-size: var(--bf-text-sm);
    font-weight: 500;
    color: var(--bf-text-secondary);
}

.bf-form-input,
.bf-form-select,
.bf-form-textarea {
    width: 100%;
    padding: var(--bf-space-sm) var(--bf-space-md);
    background: var(--bf-bg-tertiary);
    border: 1px solid var(--bf-border-primary);
    border-radius: var(--bf-radius-md);
    color: var(--bf-text-primary);
    font-family: var(--bf-font-sans);
    font-size: var(--bf-text-md);
    transition: border-color var(--bf-transition-fast);
}

.bf-form-input:focus,
.bf-form-select:focus,
.bf-form-textarea:focus {
    outline: none;
    border-color: var(--bf-accent-primary);
}

.bf-form-input::placeholder,
.bf-form-textarea::placeholder {
    color: var(--bf-text-muted);
}

.bf-form-textarea {
    min-height: 100px;
    resize: vertical;
}

/* ========================================
   Table Component
   ======================================== */
.bf-table {
    width: 100%;
    border-collapse: collapse;
}

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

.bf-table th {
    background: var(--bf-bg-tertiary);
    font-weight: 600;
    font-size: var(--bf-text-sm);
    color: var(--bf-text-secondary);
}

.bf-table tr:hover td {
    background: var(--bf-bg-tertiary);
}

/* ========================================
   Badge Component
   ======================================== */
.bf-badge {
    display: inline-flex;
    align-items: center;
    padding: var(--bf-space-xs) var(--bf-space-sm);
    border-radius: var(--bf-radius-full);
    font-size: var(--bf-text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.bf-badge-success {
    background: var(--bf-accent-success);
    color: var(--bf-text-inverse);
}

.bf-badge-warning {
    background: var(--bf-accent-warning);
    color: var(--bf-text-inverse);
}

.bf-badge-danger {
    background: var(--bf-accent-danger);
    color: white;
}

.bf-badge-primary {
    background: var(--bf-accent-primary);
    color: var(--bf-text-inverse);
}

.bf-badge-secondary {
    background: var(--bf-accent-secondary);
    color: white;
}

.bf-badge-muted {
    background: var(--bf-bg-elevated);
    color: var(--bf-text-muted);
}

/* ========================================
   Modal Component
   ======================================== */
.bf-modal-overlay {
    position: fixed;
    inset: 0;
    background: var(--bf-bg-overlay);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--bf-z-modal);
    padding: var(--bf-space-lg);
}

.bf-modal {
    background: var(--bf-bg-secondary);
    border: 1px solid var(--bf-border-primary);
    border-radius: var(--bf-radius-xl);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow: auto;
}

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

.bf-modal-body {
    padding: var(--bf-space-lg);
}

.bf-modal-footer {
    padding: var(--bf-space-lg);
    border-top: 1px solid var(--bf-border-primary);
    display: flex;
    justify-content: flex-end;
    gap: var(--bf-space-sm);
}

/* ========================================
   Toast Component
   ======================================== */
.bf-toast-container {
    position: fixed;
    bottom: var(--bf-space-lg);
    right: var(--bf-space-lg);
    z-index: var(--bf-z-toast);
    display: flex;
    flex-direction: column;
    gap: var(--bf-space-sm);
}

.bf-toast {
    background: var(--bf-bg-secondary);
    border: 1px solid var(--bf-border-primary);
    border-radius: var(--bf-radius-lg);
    padding: var(--bf-space-md) var(--bf-space-lg);
    box-shadow: var(--bf-shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--bf-space-sm);
    animation: slideIn var(--bf-transition-normal);
}

.bf-toast-success { border-left: 4px solid var(--bf-accent-success); }
.bf-toast-warning { border-left: 4px solid var(--bf-accent-warning); }
.bf-toast-error { border-left: 4px solid var(--bf-accent-danger); }
.bf-toast-info { border-left: 4px solid var(--bf-accent-primary); }

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* ========================================
   Stats Card Component
   ======================================== */
.bf-stat-card {
    background: var(--bf-bg-secondary);
    border: 1px solid var(--bf-border-primary);
    border-radius: var(--bf-radius-lg);
    padding: var(--bf-space-lg);
    text-align: center;
}

.bf-stat-value {
    font-size: var(--bf-text-3xl);
    font-weight: 700;
    font-family: var(--bf-font-mono);
    line-height: 1.2;
}

.bf-stat-value.accent { color: var(--bf-accent-primary); }
.bf-stat-value.secondary { color: var(--bf-accent-secondary); }
.bf-stat-value.warning { color: var(--bf-accent-warning); }
.bf-stat-value.danger { color: var(--bf-accent-danger); }
.bf-stat-value.success { color: var(--bf-accent-success); }

.bf-stat-label {
    font-size: var(--bf-text-xs);
    color: var(--bf-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: var(--bf-space-xs);
}

/* ========================================
   Grid Utilities
   ======================================== */
.bf-grid {
    display: grid;
    gap: var(--bf-space-lg);
}

.bf-grid-2 { grid-template-columns: repeat(2, 1fr); }
.bf-grid-3 { grid-template-columns: repeat(3, 1fr); }
.bf-grid-4 { grid-template-columns: repeat(4, 1fr); }
.bf-grid-auto { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }

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

@media (max-width: 768px) {
    .bf-grid-2,
    .bf-grid-3,
    .bf-grid-4 { grid-template-columns: 1fr; }
}

/* ========================================
   Utility Classes
   ======================================== */
.bf-flex { display: flex; }
.bf-flex-center { display: flex; align-items: center; justify-content: center; }
.bf-flex-between { display: flex; justify-content: space-between; align-items: center; }
.bf-flex-col { flex-direction: column; }
.bf-gap-sm { gap: var(--bf-space-sm); }
.bf-gap-md { gap: var(--bf-space-md); }
.bf-gap-lg { gap: var(--bf-space-lg); }

.bf-text-center { text-align: center; }
.bf-text-mono { font-family: var(--bf-font-mono); }
.bf-text-muted { color: var(--bf-text-muted); }

.bf-w-full { width: 100%; }
.bf-h-full { height: 100%; }

.bf-hidden { display: none; }
.bf-sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0, 0, 0, 0); }

/* Status Dot */
.bf-status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}

.bf-status-dot.online,
.bf-status-dot.active,
.bf-status-dot.success { background: var(--bf-accent-success); }
.bf-status-dot.busy,
.bf-status-dot.warning { background: var(--bf-accent-warning); }
.bf-status-dot.offline,
.bf-status-dot.muted { background: var(--bf-text-muted); }
.bf-status-dot.error { background: var(--bf-accent-danger); }

/* Pulse Animation */
.bf-pulse {
    animation: bf-pulse 2s infinite;
}

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

/* Scrollbar Styling */
.bf-scroll::-webkit-scrollbar {
    width: 6px;
}

.bf-scroll::-webkit-scrollbar-track {
    background: var(--bf-bg-tertiary);
    border-radius: var(--bf-radius-sm);
}

.bf-scroll::-webkit-scrollbar-thumb {
    background: var(--bf-border-primary);
    border-radius: var(--bf-radius-sm);
}

.bf-scroll::-webkit-scrollbar-thumb:hover {
    background: var(--bf-border-secondary);
}