:root {
    --primary-color: #2e7d32;
    --primary-light: #4caf50;
    --primary-dark: #1b5e20;
    --secondary-color: #1976d2;
    --secondary-light: #42a5f5;
    --secondary-dark: #1565c0;
    --tertiary-color: #6a1b9a;
    --tertiary-light: #9c27b0;
    --tertiary-dark: #4a148c;
    --text-color: #333;
    --light-bg: #f5f5f5;
    --card-bg: #fff;
    --border-color: #ddd;
    --shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.fertilizer-calculator-container * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.fertilizer-calculator-container {
    background-color: var(--light-bg);
    color: var(--text-color);
    line-height: 1.6;
    padding: 20px;
}

.fertilizer-calculator-container .container {
    max-width: 1200px;
    margin: 0 auto;
}

.fertilizer-calculator-container .controls {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 10px;
}

.fertilizer-calculator-container .controls button {
    padding: 10px 15px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s;
}

.fertilizer-calculator-container .controls button:hover {
    background-color: var(--primary-dark);
}

.fertilizer-calculator-container .calculator-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 25px;
    margin-bottom: 30px;
}

.fertilizer-calculator-container .calculator-card {
    background-color: var(--card-bg);
    border-radius: 8px;
    box-shadow: var(--shadow);
    padding: 25px;
    transition: transform 0.3s ease;
}

.fertilizer-calculator-container .calculator-card:hover {
    transform: translateY(-5px);
}

.fertilizer-calculator-container .card-header {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

.fertilizer-calculator-container .card-icon {
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 15px;
    font-weight: bold;
}

.fertilizer-calculator-container h2 {
    font-size: 1.5rem;
}

.fertilizer-calculator-container .input-group {
    margin-bottom: 15px;
}

.fertilizer-calculator-container label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
}

.fertilizer-calculator-container input, 
.fertilizer-calculator-container select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    transition: border 0.3s;
}

.fertilizer-calculator-container input:focus, 
.fertilizer-calculator-container select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.fertilizer-calculator-container .unit {
    font-size: 0.9rem;
    color: #666;
    margin-left: 5px;
}

.fertilizer-calculator-container .results-box {
    background-color: #e8f5e9;
    border-left: 4px solid var(--primary-color);
    padding: 15px;
    margin-top: 20px;
    border-radius: 4px;
}

.fertilizer-calculator-container .results-title {
    font-weight: bold;
    margin-bottom: 10px;
    color: var(--primary-dark);
}

.fertilizer-calculator-container .result-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    padding-bottom: 8px;
    border-bottom: 1px dashed #ccc;
}

.fertilizer-calculator-container .result-label {
    font-weight: 500;
}

.fertilizer-calculator-container .result-value {
    font-weight: bold;
    color: var(--primary-dark);
}

.fertilizer-calculator-container .roi-positive {
    color: #2e7d32;
}

.fertilizer-calculator-container .roi-negative {
    color: #d32f2f;
}

.fertilizer-calculator-container .info-text {
    font-size: 0.9rem;
    color: #666;
    margin-top: 5px;
    font-style: italic;
}

@media (max-width: 768px) {
    .fertilizer-calculator-container .calculator-grid {
        grid-template-columns: 1fr;
    }
    
    .fertilizer-calculator-container .controls {
        flex-direction: column;
    }
}

/* Print styles */
@media print {
    .fertilizer-calculator-container {
        background-color: white;
        padding: 0;
    }
    
    .fertilizer-calculator-container .controls {
        display: none;
    }
    
    .fertilizer-calculator-container .calculator-grid {
        display: block;
    }
    
    .fertilizer-calculator-container .calculator-card {
        box-shadow: none;
        border: 1px solid #ccc;
        margin-bottom: 20px;
        page-break-inside: avoid;
    }
}