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

body {
    font-family: 'Microsoft YaHei', sans-serif;
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 1rem auto;
    padding: 0 0.5rem;
}

h1 {
    text-align: center;
    color: #444;
    margin-bottom: 1rem;
}

h2 {
    color: #444;
    margin-bottom: 0.8rem;
    text-align: center;
    font-size: 1.3rem;
}

.calculators-wrapper {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.calculator {
    background-color: white;
    padding: 1rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    flex: 1;
    min-width: 300px;
    max-width: 500px;
}

.input-group {
    margin-bottom: 0.5rem;
}

label {
    display: block;
    margin-bottom: 0.2rem;
    color: #555;
    font-size: 0.9rem;
    font-weight: bold;
}

input {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 0.9rem;
    color: #444;
}

input:focus {
    outline: none;
    border-color: #666;
}

button {
    width: 100%;
    padding: 0.5rem;
    background-color: #555;
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 0.9rem;
    cursor: pointer;
    margin: 0.3rem 0;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #444;
}

.results {
    margin-top: 1rem;
    padding: 0.5rem;
    background-color: #f8f8f8;
    border-radius: 5px;
}

.result-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.2rem;
    padding: 0.2rem;
    border-bottom: 1px solid #eee;
}

.result-item:last-child {
    border-bottom: none;
}

.result-item span:first-child {
    color: #666;
    font-weight: bold;
}

.result-item span:last-child {
    color: #444;
}

.formula-display {
    margin: 0.3rem 0;
    padding: 0.3rem;
    background-color: #f8f8f8;
    border-radius: 5px;
    font-size: 0.85rem;
}

.formula {
    color: #666;
}

.formula p {
    margin: 0.2rem 0;
    font-size: 0.85rem;
}

.mixture-calculator {
    margin-top: 0.8rem;
    background-color: white;
    padding: 1rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.mixture-inputs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.3rem;
    margin-bottom: 0.3rem;
}

.mixture-inputs .input-group {
    flex: 1;
    min-width: 200px;
}

.mixture-results {
    margin-top: 0.5rem;
    padding: 0.5rem;
    background-color: #f8f8f8;
    border-radius: 5px;
}

.summary-table {
    margin-top: 0.8rem;
    padding: 1rem;
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 0.3rem 0;
}

th, td {
    padding: 0.3rem 0.4rem;
    text-align: left;
    border-bottom: 1px solid #eee;
    font-size: 0.85rem;
}

.delete-btn {
    padding: 0.2rem 0.4rem;
    font-size: 0.8rem;
}

.export-btn {
    margin-top: 0.3rem;
    padding: 0.5rem;
    background-color: #555;
}

.export-btn:hover {
    background-color: #444;
}