body {
    font-family: 'Microsoft YaHei', sans-serif;
    background-color: #f0f2f5;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.container {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    width: 90%;
    max-width: 500px;
    text-align: center;
}

h1 {
    color: #2d3436;
    margin-bottom: 1.5rem;
}

.result-box {
    background: #f8f9fa;
    padding: 1.5rem;
    margin: 1rem 0;
    border-radius: 8px;
    font-size: 1.5rem;
    font-weight: bold;
    color: #e74c3c;
    min-height: 60px;
}

.btn {
    background: #3498db;
    color: white;
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    transition: background 0.3s ease;
}

.btn:hover {
    background: #2980b9;
}

.custom-section {
    margin-top: 2rem;
    border-top: 2px solid #eee;
    padding-top: 1.5rem;
}

.input-group {
    display: flex;
    gap: 0.5rem;
    margin: 1rem 0;
}

input[type="text"] {
    flex: 1;
    padding: 0.8rem;
    border: 2px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
}

.add-btn {
    background: #27ae60;
}

.add-btn:hover {
    background: #219a52;
}

.food-list {
    display: grid;
    gap: 0.5rem;
    margin-top: 1rem;
}

.food-item {
    background: #f8f9fa;
    padding: 0.5rem;
    border-radius: 5px;
    text-align: left;
}