:root {
    --primary-color: #4361ee;
    --primary-light: #4cc9f0;
    --primary-dark: #3a0ca3;
    --secondary-color: #f72585;
    --dark-color: #1a1a2e;
    --light-color: #f8f9fa;
    --gray-color: #6c757d;
    --success-color: #4caf50;
    --warning-color: #ff9800;
    --danger-color: #f44336;
    --border-radius: 10px;
    --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    --transition: all 0.25s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

body {
    background-color: #f8fafc;
    color: #2d3748;
    line-height: 1.6;
    padding: 20px;
}

.calculator-container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    overflow: hidden;
    padding: 25px;
    position: relative;
}

.calculator-header {
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid #e2e8f0;
    position: relative;
}

.logo-watermark {
    position: absolute;
    top: 10px;
    right: 20px;
    font-size: 1.2rem;
    font-weight: 700;
    color: rgba(67, 97, 238, 0.1);
    letter-spacing: 1px;
}

.calculator-header h1 {
    color: var(--primary-color);
    margin-bottom: 8px;
    font-size: 2.2rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.calculator-header p {
    color: var(--gray-color);
    font-size: 1.05rem;
}

.calculator-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

.input-section {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

@media (min-width: 768px) {
    .calculator-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .input-section {
        grid-template-columns: 1fr;
    }
    
    .results-section {
        grid-column: 2;
        grid-row: 1;
    }
    
    .charts-section {
        grid-column: 1 / -1;
    }
}

.input-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 22px;
    transition: var(--transition);
    border: 1px solid #edf2f7;
}

.input-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.1);
}

.input-card h2 {
    color: var(--primary-color);
    margin-bottom: 18px;
    font-size: 1.3rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.input-group {
    margin-bottom: 16px;
}

.input-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    color: #4a5568;
    font-size: 0.95rem;
}

.input-group input {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    font-size: 1rem;
    transition: var(--transition);
    background-color: #f8fafc;
}

.input-group input:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.15);
    background-color: white;
}

.input-group input[disabled] {
    background-color: #f1f5f9;
    cursor: not-allowed;
}

.results-section {
    display: grid;
    grid-template-columns: 1fr;
    gap: 18px;
}

@media (min-width: 480px) {
    .results-section {
        grid-template-columns: 1fr 1fr;
    }
    
    .primary-result {
        grid-column: 1 / -1;
    }
}

.result-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 20px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid #edf2f7;
}

.result-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.1);
}

.result-card h3 {
    color: var(--primary-color);
    margin-bottom: 12px;
    font-size: 1.15rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.primary-result {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border: none;
}

.primary-result h3 {
    color: white;
}

.score-display {
    font-size: 3.8rem;
    font-weight: 700;
    margin: 12px 0;
    line-height: 1;
}

.secondary-metric {
    font-size: 1.9rem;
    font-weight: 600;
    color: var(--primary-color);
    margin: 12px 0;
    line-height: 1;
}

.score-description {
    font-size: 1.05rem;
    font-weight: 500;
    opacity: 0.9;
}

.charts-section {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    margin-top: 10px;
}

@media (min-width: 768px) {
    .charts-section {
        grid-template-columns: 1fr 1fr;
    }
}

.chart-container {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 20px;
    height: 320px;
    border: 1px solid #edf2f7;
}

/* Compact Button Styles */
.action-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 20px;
    justify-content: center;
}

.btn {
    padding: 6px 16px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.88rem;
    font-weight: 500;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-width: 140px;
    justify-content: center;
    height: 36px;
    line-height: 1;
}

.btn i {
    font-size: 0.9rem;
}

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

.pdf-btn:hover {
    background-color: var(--primary-dark);
}

.share-btn {
    background-color: #f1f5f9;
    color: var(--dark-color);
    border: 1px solid #e2e8f0;
}

.share-btn:hover {
    background-color: #e2e8f0;
}

.csv-btn {
    background-color: #4caf50;
    color: white;
}

.csv-btn:hover {
    background-color: #3d8b40;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.instructions-section {
    margin-top: 30px;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 22px;
    border: 1px solid #edf2f7;
}

.instructions-section h2 {
    color: var(--primary-color);
    margin-bottom: 16px;
    font-size: 1.3rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.instructions-section ol {
    padding-left: 22px;
    margin-bottom: 16px;
}

.instructions-section li {
    margin-bottom: 8px;
    line-height: 1.6;
}

.note {
    background-color: #f8fafc;
    padding: 12px 16px;
    border-left: 4px solid var(--primary-color);
    font-size: 0.9rem;
    border-radius: 4px;
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

.note i {
    color: var(--primary-color);
    margin-top: 2px;
}

/* Print styles */
@media print {
    body * {
        visibility: hidden;
    }
    #calculator-print, #calculator-print * {
        visibility: visible;
    }
    #calculator-print {
        position: absolute;
        left: 0;
        top: 0;
        width: 100%;
        box-shadow: none;
        padding: 0;
    }
    .action-buttons {
        display: none;
    }
    .logo-watermark {
        opacity: 0.3;
    }
}