/* style.css */
body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    margin: 0;
    padding: 20px;
    min-height: 100vh;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 0 20px rgba(0,0,0,0.1);
}

h1 {
    text-align: center;
    color: #2c3e50;
}

.calculator-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.tab {
    flex: 1;
    padding: 15px;
    background: #ecf0f1;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
}

.tab.active {
    background: #3498db;
    color: white;
}

.calculator {
    display: none;
    gap: 10px;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    margin-bottom: 20px;
}

.calculator.active {
    display: grid;
}

input, select {
    padding: 12px;
    border: 1px solid #bdc3c7;
    border-radius: 6px;
    font-size: 16px;
}

button {
    padding: 12px;
    background: #3498db;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.3s;
}

button:hover {
    background: #2980b9;
}

.result {
    grid-column: 1 / -1;
    padding: 15px;
    margin-top: 10px;
    border-radius: 6px;
    background: #ecf0f1;
    text-align: center;
    font-weight: bold;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
}

.modal-content {
    background: white;
    margin: 5% auto;
    padding: 20px;
    width: 80%;
    max-width: 600px;
    border-radius: 10px;
    position: relative;
}

.close {
    position: absolute;
    right: 20px;
    top: 10px;
    font-size: 28px;
    cursor: pointer;
}

.food-category {
    margin-bottom: 20px;
}

.food-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 10px;
}

.food-item {
    padding: 15px;
    background: #f8f9fa;
    border-radius: 8px;
    text-align: center;
}

@media (max-width: 600px) {
    .calculator {
        grid-template-columns: 1fr;
    }
    
    .modal-content {
        width: 90%;
        margin: 10% auto;
    }
}