:root {
    --primary-color: #3f51b5;
    --primary-light: #757de8;
    --primary-dark: #002984;
    --secondary-color: #4caf50;
    --accent-color: #ff9800;
    --error-color: #f44336;
    --text-primary: #333;
    --text-secondary: #666;
    --background-light: #fff;
    --background-off: #f5f7fa;
    --border-color: #ddd;
    
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
}

/* Base Styles */
body {
    font-family: var(--font-family);
    margin: 0;
    padding: 0;
    background: var(--background-off);
    color: var(--text-primary);
}

.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.main-header {
    background-color: var(--primary-color);
    color: white;
    padding: 1rem;
    box-shadow: var(--shadow-sm);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
}

.tagline {
    font-size: 0.8rem;
    opacity: 0.8;
}

/* Navigation */
.nav-list {
    list-style: none;
    display: flex;
    gap: 1rem;
    padding: 0;
    margin: 0;
}

.nav-link {
    color: white;
    cursor: pointer;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    text-decoration: none;
}

.nav-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.nav-link.active {
    background-color: rgba(255, 255, 255, 0.2);
}

/* Main Content */
.main-content {
    flex: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
}

.section-title {
    font-size: 2rem;
    color: var(--primary-dark);
    margin-bottom: 1.5rem;
}

/* Grid Layout */
.lab-container {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 1.5rem;
}

@media (max-width: 900px) {
    .lab-container {
        grid-template-columns: 1fr;
    }
}

/* Panels */
.panel {
    background: white;
    border-radius: 8px;
    padding: 1rem;
    box-shadow: var(--shadow-sm);
}

.panel-title {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--primary-dark);
}

/* Parameter Controls */
.parameter-control {
    margin-bottom: 1rem;
}

.parameter-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.parameter-slider {
    width: 100%;
    margin-bottom: 0.5rem;
}

.slider-display {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Privacy Budget Display */
.budget-display {
    margin-top: 1.5rem;
    padding: 1rem;
    background: var(--background-off);
    border-radius: 4px;
}

.budget-bar {
    height: 8px;
    background-color: #e0e0e0;
    border-radius: 4px;
    position: relative;
    margin: 0.5rem 0;
}

.budget-fill {
    height: 100%;
    border-radius: 4px;
    background-color: var(--accent-color);
    transition: width 0.3s ease;
}

.budget-fill.low {
    background-color: var(--secondary-color);
}

.budget-fill.medium {
    background-color: var(--accent-color);
}

.budget-fill.high {
    background-color: var(--error-color);
}

/* Buttons */
.control-button {
    width: 100%;
    padding: 0.8rem;
    border: none;
    border-radius: 4px;
    background-color: var(--primary-color);
    color: white;
    font-weight: bold;
    cursor: pointer;
    margin-top: 1rem;
    transition: background-color 0.3s ease;
}

.control-button:hover {
    background-color: var(--primary-dark);
}

.control-button.running {
    background-color: var(--error-color);
}

/* Charts */
.chart-container {
    position: relative;
    height: 300px;
    width: 100%;
    margin-bottom: 1rem;
}

.chart-container canvas {
    width: 100% !important;
    height: 100% !important;
}

/* Metrics */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1rem;
}

.metric-card {
    background-color: var(--background-off);
    border-radius: 4px;
    padding: 1rem;
    text-align: center;
}

.metric-value {
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.metric-label {
    color: var(--text-secondary);
    font-weight: 500;
}

/* Recommendations */
.recommendation-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.recommendation-item {
    display: flex;
    align-items: flex-start;
    padding: 0.8rem 0;
    border-bottom: 1px solid var(--border-color);
}

.recommendation-icon {
    margin-right: 0.5rem;
    font-size: 1.2rem;
}

/* Tabs */
.tabs {
    display: flex;
    margin-bottom: 1rem;
}

.tab {
    padding: 0.5rem 1rem;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.3s ease;
}

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

.tab.active {
    border-bottom: 2px solid var(--primary-color);
    color: var(--primary-color);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Training Status */
.status-badge {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.5rem 1rem;
    background-color: #f5f5f5;
    border-radius: 4px;
    margin-top: 1rem;
}

.pulse {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: #4caf50;
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(76, 175, 80, 0.7);
    }
    
    70% {
        transform: scale(1);
        box-shadow: 0 0 0 10px rgba(76, 175, 80, 0);
    }
    
    100% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(76, 175, 80, 0);
    }
}

/* Footer */
.footer {
    text-align: center;
    padding: 1rem;
    background-color: var(--primary-dark);
    color: white;
    margin-top: 2rem;
}

/* Tooltips */
.tooltip {
    position: relative;
    display: inline-block;
    margin-left: 0.5rem;
}

.tooltip-icon {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background-color: var(--primary-light);
    color: white;
    font-size: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: help;
}

.tooltip-text {
    visibility: hidden;
    width: 200px;
    background-color: #333;
    color: white;
    text-align: center;
    border-radius: 4px;
    padding: 0.5rem;
    position: absolute;
    z-index: 1;
    bottom: 125%;
    left: 50%;
    margin-left: -100px;
    opacity: 0;
    transition: opacity 0.3s;
    font-size: 0.8rem;
}

.tooltip:hover .tooltip-text {
    visibility: visible;
    opacity: 1;
}

/* Learning Hub Styles */
.learning-container {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 1.5rem;
}

.learning-sidebar {
    background: white;
    border-radius: 8px;
    padding: 1rem;
    box-shadow: var(--shadow-sm);
}

.learning-content {
    background: white;
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
}

.learning-steps {
    list-style: none;
    padding: 0;
    margin: 0;
}

.learning-step {
    padding: 0.75rem 0.5rem;
    border-radius: 4px;
    cursor: pointer;
    margin-bottom: 0.5rem;
    transition: all 0.3s ease;
}

.learning-step:hover {
    background-color: var(--background-off);
}

.learning-step.active {
    background-color: var(--background-off);
    color: var(--primary-color);
    font-weight: 500;
}

/* Concept Boxes */
.concept-highlight {
    background-color: var(--background-off);
    border-radius: 4px;
    padding: 1rem;
    margin: 1rem 0;
}

.formula {
    background-color: #f5f7fa;
    padding: 0.75rem;
    border-radius: 4px;
    font-family: monospace;
    margin: 1rem 0;
}

.concept-box {
    display: flex;
    margin: 1rem 0;
    gap: 1rem;
}

.concept-box > div {
    flex: 1;
    padding: 1rem;
    border-radius: 8px;
}

.concept-box .box1 {
    background-color: #e3f2fd;
}

.concept-box .box2 {
    background-color: #fff8e1;
}

/* Error Message */
.error-message {
    background-color: #ffebee;
    color: #c62828;
    padding: 1rem;
    margin-bottom: 1rem;
    border-radius: 4px;
    border-left: 4px solid #c62828;
    animation: slideIn 0.3s ease-out;
}

/* View Toggle Buttons */
.view-toggle {
    padding: 4px 12px;
    border: none;
    background: transparent;
    cursor: pointer;
    border-radius: 2px;
    font-size: 0.8rem;
    transition: background-color 0.2s ease;
    color: var(--text-secondary);
}

.view-toggle:hover {
    background-color: rgba(63, 81, 181, 0.1);
}

.view-toggle.active {
    background-color: var(--primary-color);
    color: white;
}

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