/* Design System Variables */
:root {
    /* Colors */
    --bg-primary: #1a1a1a;
    --bg-secondary: #2a2a2a;
    --bg-tertiary: #333333;
    --border-color: #3f3f3f;
    
    --text-primary: #ffffff;
    --text-secondary: #e5e5e5;
    --text-muted: #a3a3a3;
    
    --accent-lime: #ccfa00;
    --accent-lime-hover: #b8e600;
    
    /* Status Colors */
    --status-purple: #a855f7;
    --status-blue: #3b82f6;
    --status-teal: #06b6d4;
    --status-green: #10b981;
    --status-orange: #f97316;
    --status-pink: #ec4899;
    --status-red: #ef4444;
    --status-gray: #6b7280;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
}

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

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

/* Layout */
.app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-md) var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

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

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

/* Navigation */
.nav {
    display: flex;
    gap: var(--spacing-md);
    margin-left: var(--spacing-xl);
}

.nav-link {
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all 0.2s;
    font-weight: 500;
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.nav-link.active {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

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

.icon-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-md);
    transition: background 0.2s;
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-btn:hover {
    background: var(--bg-tertiary);
}

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

.profile-avatar {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    background: var(--accent-lime);
    color: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
}

/* Main Content */
.main {
    flex: 1;
    padding: var(--spacing-xl);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

/* Page Header */
.page-header {
    margin-bottom: var(--spacing-xl);
}

.page-title h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.subtitle {
    color: var(--text-muted);
    font-size: 1rem;
}

/* Status Bar */
.status-bar {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    display: flex;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-xl);
}

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

.status-dot {
    width: 0.75rem;
    height: 0.75rem;
    border-radius: 50%;
}

.status-dot.status-active {
    background: var(--status-teal);
}

.status-dot.status-idle {
    background: var(--status-gray);
}

.status-dot.status-queued {
    background: var(--status-blue);
}

.status-count {
    font-size: 1.5rem;
    font-weight: 700;
}

.status-label {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Tools Grid */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

/* Tool Card */
.tool-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    transition: transform 0.2s, box-shadow 0.2s;
}

.tool-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

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

.tool-icon {
    font-size: 2rem;
    line-height: 1;
}

.tool-info {
    flex: 1;
}

.tool-name {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.status-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.status-badge.status-active {
    background: rgba(6, 182, 212, 0.15);
    color: var(--status-teal);
}

.status-badge.status-idle {
    background: rgba(107, 114, 128, 0.15);
    color: var(--status-gray);
}

.status-badge.status-queued {
    background: rgba(59, 130, 246, 0.15);
    color: var(--status-blue);
}

.tool-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.tool-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.stat {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.stat-label {
    color: var(--text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-value {
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 600;
}

.tool-description {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.5;
}

.tool-footer {
    margin-top: auto;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    font-family: inherit;
}

.btn-primary {
    background: var(--accent-lime);
    color: var(--bg-primary);
}

.btn-primary:hover {
    background: var(--accent-lime-hover);
    transform: translateY(-1px);
}

.btn-icon {
    font-size: 1rem;
}

/* Section */
.section {
    margin-bottom: var(--spacing-2xl);
}

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

.section-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
}

/* Activity Feed */
.activity-feed {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.activity-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    transition: background 0.2s;
}

.activity-item:last-child {
    border-bottom: none;
}

.activity-item:hover {
    background: var(--bg-tertiary);
}

.activity-icon {
    font-size: 1.5rem;
    line-height: 1;
    opacity: 0.8;
}

.activity-content {
    flex: 1;
}

.activity-text {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 0.25rem;
}

.activity-text strong {
    color: var(--text-primary);
    font-weight: 600;
}

.activity-time {
    color: var(--text-muted);
    font-size: 0.75rem;
}

/* Responsive */
@media (max-width: 768px) {
    .main {
        padding: var(--spacing-md);
    }
    
    .status-bar {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
    }
    
    .tool-stats {
        grid-template-columns: 1fr;
    }
}