/* ===== MODERN CSS VARIABLES ===== */
:root {
    /* Colors */
    --primary-color: #6366f1;
    --primary-hover: #5855eb;
    --secondary-color: #f1f5f9;
    --accent-color: #10b981;
    --error-color: #ef4444;
    --warning-color: #f59e0b;
    --success-color: #10b981;
    
    /* Text Colors */
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    
    /* Layout */
    --border-color: #e2e8f0;
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-page: #fafafa;
    
    /* Effects */
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --transition: all 0.2s ease;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
}

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

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-page);
    font-size: var(--font-size-base);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* ===== HEADER & NAVIGATION ===== */
.header {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
}

.logo {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary-color);
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    font-size: var(--font-size-sm);
    line-height: 1;
}

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

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

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

.btn-secondary:hover {
    background: #e2e8f0;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

/* ===== CARDS ===== */
.card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.card-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.card-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.card-icon {
    color: var(--primary-color);
    font-size: var(--font-size-lg);
}

/* ===== GRIDS ===== */
.grid {
    display: grid;
    gap: 1.5rem;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* ===== FORMS ===== */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    transition: var(--transition);
    background: var(--bg-primary);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* ===== RESULTS DISPLAY ===== */
.results-container {
    max-width: 1200px;
    margin: 2rem auto 0;
    padding: 1.25rem;
}

.results-sections {
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    padding: 2rem;
    position: relative;
}

.section-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.section-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.section-icon {
    color: var(--primary-color);
    font-size: var(--font-size-xl);
}

/* Metrics Grid */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

/* New Metrics Comparison Layout - Compact Design */
.metrics-comparison-container {
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    margin-bottom: 1rem;
}

.metrics-headers {
    display: grid;
    grid-template-columns: 140px repeat(auto-fit, minmax(80px, 1fr));
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    color: var(--text-secondary);
    font-size: var(--font-size-xs);
}

.metric-header-spacer {
    /* Empty space above implementation labels */
    visibility: hidden;
}

.metric-header {
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    font-size: var(--font-size-xs);
}

.implementation-box {
    display: grid;
    grid-template-columns: 140px repeat(auto-fit, minmax(80px, 1fr));
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
    min-height: 40px;
    align-items: center;
}

.implementation-box:last-child {
    border-bottom: none;
}

.implementation-box:hover {
    background: rgba(255, 255, 255, 0.05);
}

.my-implementation {
    background: linear-gradient(90deg, rgba(59, 130, 246, 0.08) 0%, transparent 100%);
    border-left: 3px solid #3b82f6;
}

.my-implementation .implementation-label {
    color: #3b82f6;
}

.sklearn-implementation {
    background: linear-gradient(90deg, rgba(245, 158, 11, 0.08) 0%, transparent 100%);
    border-left: 3px solid #f59e0b;
}

.sklearn-implementation .implementation-label {
    color: #f59e0b;
}

.difference-box {
    background: linear-gradient(90deg, rgba(16, 185, 129, 0.08) 0%, transparent 100%);
    border-left: 3px solid var(--accent-color);
}

.difference-box .implementation-label {
    color: var(--accent-color);
}

.implementation-label {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    font-weight: 600;
    font-size: var(--font-size-sm);
    line-height: 1.2;
}

.impl-icon {
    font-size: var(--font-size-base);
    flex-shrink: 0;
}

.impl-name {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.metrics-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
    gap: 0.5rem;
    align-items: center;
}

.metrics-row .metric-value {
    text-align: center;
    font-weight: 700;
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    padding: 0.25rem 0.375rem;
    border-radius: var(--border-radius);
    background: rgba(255, 255, 255, 0.3);
    line-height: 1.2;
    min-height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.metric-value.positive {
    color: var(--success-color);
    background: rgba(16, 185, 129, 0.15);
    font-weight: 800;
}

.metric-value.negative {
    color: var(--error-color);
    background: rgba(239, 68, 68, 0.15);
    font-weight: 800;
}

.metric-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1rem;
    transition: var(--transition);
}

.metric-card:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.metric-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
}

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

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

.metric-improvement {
    color: var(--success-color);
}

.metric-degradation {
    color: var(--error-color);
}

/* Training Details */
.training-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.detail-item {
    display: flex;
    flex-direction: column;
    padding: 0.75rem;
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.detail-item:hover {
    background: #f1f5f9;
    border-color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(99, 102, 241, 0.1);
}

.detail-label {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.3px;
    margin-bottom: 0.25rem;
    line-height: 1.2;
}

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

/* Chart Container */
.chart-container {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.chart-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

/* ===== CHARTS GRID SYSTEM ===== */
.charts-grid {
    display: grid;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

/* Chart Grid Layouts */
.charts-grid.layout-single {
    grid-template-columns: 1fr;
}

.charts-grid.layout-dual {
    grid-template-columns: repeat(2, 1fr);
}

.charts-grid.layout-grid {
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
}

.charts-grid.layout-masonry {
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
}

/* Chart Wrapper */
.chart-wrapper {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: var(--transition);
}

.chart-wrapper:hover {
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-color);
}

/* Chart Sizes */
.chart-medium {
    min-height: 400px;
}

.chart-large {
    min-height: 500px;
    grid-column: span 2;
}

/* Chart Header */
.chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.chart-header .chart-title {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin: 0;
    color: var(--text-primary);
}

.chart-controls {
    display: flex;
    gap: 0.5rem;
}

.chart-resize-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 0.25rem 0.5rem;
    cursor: pointer;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    transition: var(--transition);
}

.chart-resize-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* Chart Content */
.chart-wrapper .chart-container {
    border: none;
    margin: 0;
    padding: 1rem;
    border-radius: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
}

/* Plotly.js chart container */
.js-plotly-plot,
.chart-container .js-plotly-plot {
    width: 100% !important;
    height: 100% !important;
    min-height: 400px;
}

.chart-medium .js-plotly-plot {
    min-height: 350px;
}

.chart-large .js-plotly-plot {
    min-height: 450px;
}

/* Chart Loading */
.chart-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 200px;
    color: var(--text-secondary);
}

.loading-spinner {
    width: 24px;
    height: 24px;
    border: 2px solid var(--border-color);
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 0.5rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Responsive Design */
@media (max-width: 768px) {
    .charts-grid.layout-dual,
    .charts-grid.layout-grid,
    .charts-grid.layout-masonry {
        grid-template-columns: 1fr;
    }
    
    .chart-large {
        grid-column: span 1;
        min-height: 350px;
    }
    
    .chart-medium {
        min-height: 300px;
    }
}

/* ===== UTILITIES ===== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.text-primary { color: var(--primary-color); }
.text-secondary { color: var(--text-secondary); }
.text-success { color: var(--success-color); }
.text-error { color: var(--error-color); }
.text-warning { color: var(--warning-color); }

.hidden { display: none !important; }
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .container {
        padding: 0 0.75rem;
    }
    
    .nav {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-links {
        gap: 1rem;
    }
    
    .results-container {
        padding: 1rem;
    }
    
    .results-sections {
        padding: 1.5rem;
    }
    
    .metrics-grid {
        grid-template-columns: 1fr;
    }
    
    .training-details {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .training-details {
        grid-template-columns: 1fr;
    }
    
    .btn {
        padding: 0.625rem 1.25rem;
        font-size: var(--font-size-xs);
    }
}

/* ===== ALGORITHM PAGE SPECIFIC STYLES ===== */

/* Main Layout */
.main {
    min-height: calc(100vh - 80px);
    padding: 2rem 0;
}

/* Navigation Brand */
.nav-brand {
    display: flex;
    align-items: center;
}

.brand-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 700;
    font-size: var(--font-size-xl);
    transition: var(--transition);
}

.brand-link:hover {
    opacity: 0.8;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Status Button */
.status-button {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    font-size: var(--font-size-sm);
}

.status-button:hover {
    background: var(--bg-secondary);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-muted);
    transition: var(--transition);
}

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

.status-dot.disconnected {
    background: var(--error-color);
}

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

/* Algorithm Header */
.algorithm-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding: 2rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
}

.algorithm-info h1 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
    font-size: var(--font-size-3xl);
    font-weight: 700;
}

.algorithm-info p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: var(--font-size-lg);
}

.algorithm-code-action {
    margin-top: 1rem;
}

.algorithm-actions {
    flex-shrink: 0;
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

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

.btn-large {
    padding: 1rem 2rem;
    font-size: var(--font-size-lg);
    font-weight: 600;
}

/* Training Configuration */
.training-config {
    margin-bottom: 2rem;
    padding: 2rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
}

.training-config h3 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
}

.config-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

/* Hyperparameter Controls */
.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.control-label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: var(--font-size-sm);
}

.control-input {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.slider-control {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.slider-input {
    flex: 1;
    height: 6px;
    border-radius: 3px;
    background: var(--secondary-color);
    outline: none;
    -webkit-appearance: none;
}

.slider-input::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
}

.slider-input::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: none;
}

.number-display {
    width: 80px;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    text-align: center;
    font-size: var(--font-size-sm);
}

.control-range {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    white-space: nowrap;
}

.checkbox-input {
    width: 20px;
    height: 20px;
    accent-color: var(--primary-color);
}

.select-input {
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--bg-primary);
    font-size: var(--font-size-base);
}

.no-hyperparameters {
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
}

.no-hyperparameters i {
    font-size: var(--font-size-2xl);
    margin-bottom: 1rem;
    color: var(--primary-color);
}

/* Training Status */
.training-status {
    margin-bottom: 2rem;
    padding: 3rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    text-align: center;
}

.status-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.loading-spinner {
    font-size: var(--font-size-3xl);
    color: var(--primary-color);
}

.status-text h3 {
    margin-bottom: 0.5rem;
    font-size: var(--font-size-xl);
    color: var(--text-primary);
}

.status-text p {
    color: var(--text-secondary);
    font-size: var(--font-size-base);
}

/* Results Section */
.results-section {
    margin-bottom: 2rem;
}

/* Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    max-width: 90vw;
    max-height: 90vh;
    overflow: hidden;
    z-index: 1001;
}

.code-modal-content {
    width: 900px;
    max-width: 90vw;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.modal-header h2 {
    margin: 0;
    font-size: var(--font-size-xl);
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: var(--font-size-xl);
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.modal-close:hover {
    background: var(--border-color);
}

.modal-body {
    padding: 1.5rem;
    max-height: 70vh;
    overflow-y: auto;
}

.code-info {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
}

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

.code-filename {
    font-weight: 600;
    color: var(--text-primary);
}

.code-language {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    text-transform: uppercase;
    font-weight: 500;
}

.code-description {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.code-block {
    position: relative;
    background: #2d3748;
    border-radius: var(--border-radius);
    overflow: hidden;
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: #1a202c;
    border-bottom: 1px solid #4a5568;
}

.code-actions {
    display: flex;
    gap: 0.5rem;
}

.copy-btn {
    padding: 0.5rem 1rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: var(--transition);
}

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

pre {
    margin: 0;
    padding: 1.5rem;
    overflow-x: auto;
    font-family: 'Fira Code', 'Monaco', 'Cascadia Code', 'Segoe UI Mono', monospace;
    line-height: 1.5;
    font-size: var(--font-size-sm);
}

/* Algorithm Page Responsive */
@media (max-width: 768px) {
    .algorithm-header {
        flex-direction: column;
        align-items: stretch;
        gap: 1.5rem;
        text-align: center;
    }
    
    .algorithm-actions {
        align-self: stretch;
    }
    
    .btn-large {
        width: 100%;
        justify-content: center;
    }
    
    .config-grid {
        grid-template-columns: 1fr;
    }
    
    .slider-control {
        flex-direction: column;
        align-items: stretch;
        gap: 0.75rem;
    }
    
    .number-display {
        width: 100%;
    }
    
    .nav-actions {
        flex-direction: column;
        gap: 0.75rem;
        width: 100%;
    }
    
    .status-button {
        justify-content: center;
    }
}

/* ===== HOMEPAGE SPECIFIC STYLES ===== */

/* Hero Section */
.hero {
    text-align: center;
    padding: 4rem 0;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-size: 200% 200%;
    animation: gradient 6s ease infinite;
}

@keyframes gradient {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.hero h2 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Algorithms Grid */
.algorithms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    padding: 2rem 0;
}

.algorithm-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
    text-decoration: none;
    color: inherit;
}

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

.algorithm-card-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.algorithm-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius);
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-size-xl);
}

.algorithm-info h3 {
    margin: 0;
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
}

.algorithm-type {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    text-transform: capitalize;
}

.algorithm-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.algorithm-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.algorithm-tag {
    padding: 0.25rem 0.75rem;
    background: var(--secondary-color);
    color: var(--text-secondary);
    border-radius: 9999px;
    font-size: var(--font-size-xs);
    font-weight: 500;
}

/* Loading State */
.loading {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 4rem 0;
    color: var(--text-secondary);
}

.loading i {
    font-size: var(--font-size-2xl);
    color: var(--primary-color);
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    margin-top: 4rem;
}

.footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* Homepage Responsive */
@media (max-width: 768px) {
    .hero {
        padding: 2rem 0;
    }
    
    .hero h2 {
        font-size: var(--font-size-2xl);
    }
    
    .algorithms-grid {
        grid-template-columns: 1fr;
        padding: 1rem 0;
    }
    
    .footer .container {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    /* Responsive Metrics Comparison - Compact */
    .metrics-headers,
    .implementation-box {
        grid-template-columns: 100px repeat(auto-fit, minmax(60px, 1fr));
        gap: 0.25rem;
        padding: 0.375rem 0.5rem;
    }
    
    .metrics-headers {
        font-size: 10px;
    }
    
    .implementation-label {
        font-size: 11px;
        gap: 0.25rem;
    }
    
    .impl-name {
        display: none;
    }
    
    .impl-icon {
        font-size: 12px;
    }
    
    .metrics-row .metric-value {
        font-size: 11px;
        padding: 0.125rem 0.25rem;
        min-height: 24px;
    }
}

@media (max-width: 480px) {
    .metrics-headers,
    .implementation-box {
        grid-template-columns: 80px repeat(auto-fit, minmax(50px, 1fr));
        gap: 0.125rem;
        padding: 0.25rem 0.375rem;
        min-height: 32px;
    }
    
    .metric-header {
        font-size: 9px;
        letter-spacing: 0px;
    }
    
    .impl-icon {
        font-size: 10px;
    }
    
    .metrics-row .metric-value {
        font-size: 10px;
        padding: 0.125rem;
        min-height: 20px;
    }
}