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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

.container {
    max-width: 800px;
    margin: 2rem auto;
    padding: 2rem;
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

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

.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: bold;
}

input[type="number"],
select {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}

button {
    display: block;
    width: 100%;
    padding: 1rem;
    background-color: #2c3e50;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 1.1rem;
    cursor: pointer;
    margin-top: 1rem;
}

button:hover {
    background-color: #34495e;
}

.hidden {
    display: none;
}

#result {
    margin-top: 2rem;
    padding: 1rem;
    border-top: 2px solid #eee;
}

#riskScore {
    font-weight: bold;
    font-size: 1.2rem;
    color: #2c3e50;
}

#riskLevel {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 4px;
    text-align: center;
    font-weight: bold;
}

.low-risk {
    background-color: #d4edda;
    color: #155724;
}

.moderate-risk {
    background-color: #fff3cd;
    color: #856404;
}

.high-risk {
    background-color: #f8d7da;
    color: #721c24;
}

.language-switch,
.lang-btn {
    display: none;
}

.input-unit-group {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.input-unit-group input {
    flex: 1;
}

.input-unit-group select {
    width: auto;
    min-width: 90px;
}

.unit-hint {
    display: block;
    color: #666;
    font-size: 0.8rem;
    margin-top: 0.25rem;
}