:root {
    --primary-color: #005A9C;
    --secondary-color: #F0F8FF;
    --text-color: #333;
    --border-color: #ddd;
    --shadow-color: rgba(0, 0, 0, 0.1);
    
    --low-risk-bg: #EAF7ED;
    --low-risk-text: #1E4620;
    --low-risk-border: #A3D3A6;

    --moderate-risk-bg: #FFF8E6;
    --moderate-risk-text: #664B00;
    --moderate-risk-border: #FFDDA0;

    --high-risk-bg: #FBEAEC;
    --high-risk-text: #8A1C29;
    --high-risk-border: #F5B8BE;

    --critical-risk-bg: #2d2d2d;
    --critical-risk-text: #ffffff;
    --critical-risk-border: #e60000;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: #f4f6f9;
    color: var(--text-color);
    line-height: 1.6;
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: #fff;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 15px var(--shadow-color);
}

header {
    text-align: center;
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 1rem;
    margin-bottom: 2rem;
}

h1 {
    color: var(--primary-color);
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

h2 {
    color: var(--primary-color);
    font-size: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
    margin-top: 2.5rem;
}

.question-group {
    margin-bottom: 1.5rem;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--secondary-color);
    transition: box-shadow 0.3s ease;
}

.question-group:hover {
    box-shadow: 0 2px 8px rgba(0, 90, 156, 0.15);
}

.question-text {
    font-weight: 600;
    margin-bottom: 0.75rem;
    display: block;
}

.options-container {
    display: flex;
    justify-content: flex-start;
    gap: 2rem;
}

.options-container label {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-size: 0.95rem;
}

.options-container input[type="radio"] {
    margin-right: 0.5rem;
    accent-color: var(--primary-color);
}

.button-container {
    text-align: center;
    margin-top: 2.5rem;
}

#calculateBtn {
    background-color: var(--primary-color);
    color: #fff;
    font-size: 1.1rem;
    font-weight: bold;
    border: none;
    padding: 12px 30px;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

#calculateBtn:hover {
    background-color: #00457a;
    transform: translateY(-2px);
}

.result-display {
    margin-top: 2.5rem;
    padding: 1.5rem;
    border-width: 2px;
    border-style: solid;
    border-radius: 8px;
    text-align: center;
}

.result-display h3 {
    margin-top: 0;
    font-size: 1.8rem;
}

.result-display p {
    font-size: 1.2rem;
    font-weight: bold;
    margin-bottom: 0;
}

.low-risk {
    background-color: var(--low-risk-bg);
    color: var(--low-risk-text);
    border-color: var(--low-risk-border);
}

.moderate-risk {
    background-color: var(--moderate-risk-bg);
    color: var(--moderate-risk-text);
    border-color: var(--moderate-risk-border);
}

.high-risk {
    background-color: var(--high-risk-bg);
    color: var(--high-risk-text);
    border-color: var(--high-risk-border);
}

.critical-risk {
    background-color: var(--critical-risk-bg);
    color: var(--critical-risk-text);
    border-color: var(--critical-risk-border);
}

/* Responsive Design */
@media (max-width: 600px) {
    .container {
        padding: 1rem;
    }

    h1 {
        font-size: 1.5rem;
    }

    .options-container {
        flex-direction: column;
        gap: 0.75rem;
        align-items: flex-start;
    }
}