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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    border-radius: 15px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

h1 {
    text-align: center;
    padding: 30px;
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0;
}

h2 {
    color: #4a5568;
    margin-bottom: 20px;
    font-size: 1.5rem;
    font-weight: 600;
}

h3 {
    color: #4a5568;
    margin: 30px 0 15px 0;
    font-size: 1.25rem;
    font-weight: 600;
}

.config-section, .results-section {
    padding: 30px;
}

.methodology-section {
    padding: 20px 30px;
    background: #f8f9fa;
    border-bottom: 1px solid #e2e8f0;
}

.methodology-section details {
    cursor: pointer;
}

.methodology-section summary {
    list-style: none;
    display: flex;
    align-items: center;
    user-select: none;
}

.methodology-section summary::-webkit-details-marker {
    display: none;
}

.methodology-section summary::before {
    content: '▶';
    font-size: 0.8em;
    margin-right: 10px;
    transition: transform 0.2s ease;
}

.methodology-section details[open] summary::before {
    transform: rotate(90deg);
}

.methodology-section h2 {
    margin: 0;
    color: #4a5568;
    font-size: 1.2rem;
    font-weight: 600;
}

.methodology-content {
    margin-top: 15px;
    padding-left: 25px;
}

.methodology-content ul {
    margin: 0;
    padding-left: 20px;
}

.methodology-content li {
    margin-bottom: 8px;
    color: #4a5568;
    line-height: 1.5;
}

.methodology-content a {
    color: #4facfe;
    text-decoration: none;
}

.methodology-content a:hover {
    text-decoration: underline;
}

.banner-selection {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
    padding: 20px;
    background: #f7fafc;
    border-radius: 8px;
    border: 1px solid #e2e8f0;
}

.banner-selection label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: #4a5568;
    cursor: pointer;
}

.banner-selection input[type="radio"] {
    accent-color: #4facfe;
}

.banner-selection label:has(input:disabled) {
    opacity: 0.5;
    cursor: not-allowed;
}

.config-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.config-item {
    display: flex;
    flex-direction: column;
}

label {
    margin-bottom: 8px;
    font-weight: 600;
    color: #4a5568;
}

input[type="number"], select {
    padding: 12px 15px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 16px;
    transition: all 0.3s ease;
    background: #f7fafc;
}

input[type="number"]:focus, select:focus {
    outline: none;
    border-color: #4facfe;
    background: white;
    box-shadow: 0 0 0 3px rgba(79, 172, 254, 0.1);
}

input[type="checkbox"] {
    margin-right: 8px;
    accent-color: #4facfe;
}

.config-item label:has(input[type="checkbox"]) {
    display: flex;
    align-items: center;
    margin-bottom: 0;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 8px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(79, 172, 254, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(79, 172, 254, 0.6);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-primary:disabled {
    background: #cbd5e0;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-item {
    background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
    padding: 20px;
    border-radius: 12px;
    text-align: center;
    border: 1px solid #e2e8f0;
}

.stat-label {
    display: block;
    color: #718096;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-value {
    display: block;
    color: #2d3748;
    font-size: 24px;
    font-weight: 700;
}

.chart-container {
    background: white;
    padding: 20px;
    border-radius: 12px;
    border: 1px solid #e2e8f0;
    height: 400px;
    position: relative;
}

.results-section {
    background: #f8f9fa;
    border-top: 1px solid #e2e8f0;
}

.display-toggle {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
    padding: 15px;
    background: #f7fafc;
    border-radius: 8px;
    border: 1px solid #e2e8f0;
    justify-content: center;
}

.display-toggle label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: #4a5568;
    cursor: pointer;
    margin-bottom: 0;
}

.display-toggle input[type="radio"] {
    accent-color: #4facfe;
}

@media (max-width: 768px) {
    .container {
        margin: 10px;
        border-radius: 10px;
    }

    h1 {
        font-size: 2rem;
        padding: 20px;
    }

    .config-section, .results-section {
        padding: 20px;
    }

    .config-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .stats {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 15px;
    }
}

.loading {
    opacity: 0.6;
    pointer-events: none;
}

.loading::after {
    content: "Running...";
    margin-left: 10px;
}