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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f4f7f9;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
}

h1 {
    text-align: center;
    margin-bottom: 10px;
    color: #2c3e50;
}

.disclaimer {
    text-align: center;
    margin-bottom: 30px;
    color: #7f8c8d;
    font-size: 0.9rem;
    font-style: italic;
}

h2 {
    margin: 20px 0;
    color: #2c3e50;
}

.input-container h3 {
    margin: 20px 0 10px;
    padding-bottom: 5px;
    border-bottom: 2px solid #3498db;
    color: #2c3e50;
}

.input-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.user-choices {
    background-color: #f8f9fa;
    padding: 15px;
    border-radius: 8px;
}

.tax-parameters {
    background-color: #eaf2f8;
    padding: 15px;
    border-radius: 8px;
}

.input-group {
    margin-bottom: 15px;
    display: flex;
    flex-direction: column;
    position: relative;
}

.checkbox-group {
    flex-direction: row;
    align-items: center;
    gap: 10px;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
    margin-top: 0;
    margin-right: 5px;
}

.checkbox-group .tooltip {
    margin-left: 5px;
}

label {
    margin-bottom: 5px;
    font-weight: 500;
}

.checkbox-group label {
    margin-bottom: 0;
}

input {
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
}

input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.tooltip {
    font-size: 0.8rem;
    color: #7f8c8d;
    margin-top: 4px;
    font-style: italic;
}

button {
    grid-column: 1 / -1;
    padding: 12px;
    background-color: #3498db;
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #2980b9;
}

.results-section {
    margin-top: 30px;
}

.chart-container {
    margin-bottom: 30px;
    height: 400px;
}

.summary, .details {
    background-color: #f8fafc;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

table, th, td {
    border: 1px solid #ddd;
}

th, td {
    text-align: left;
    padding: 6px 4px;
}

th {
    background-color: #f2f2f2;
    white-space: normal;
    font-size: 0.8rem;
    vertical-align: middle;
    text-align: center;
    max-width: 60px;
}

td {
    white-space: nowrap;
}

tr:nth-child(even) {
    background-color: #f9f9f9;
}

.details {
    overflow-x: auto;
    max-width: 100%;
}

.term-explanations {
    margin-top: 15px;
    padding: 10px 15px;
    background-color: #f8f9fa;
    border-left: 3px solid #3498db;
    border-radius: 0 4px 4px 0;
    font-size: 0.85rem;
}

.term-explanations p {
    margin: 5px 0;
    line-height: 1.4;
}

.term-explanations strong {
    color: #2c3e50;
}

.info-section {
    background-color: #ecf0f1;
    padding: 20px;
    border-radius: 8px;
    margin-top: 30px;
    margin-bottom: 20px;
}

.info-section h2 {
    color: #2c3e50;
    margin-bottom: 15px;
}

.info-section h3 {
    color: #2c3e50;
    margin: 20px 0 10px;
    font-size: 1.3rem;
}

.info-section p {
    margin-bottom: 15px;
}

.info-section ul {
    margin-left: 20px;
    margin-bottom: 15px;
}

.info-section li {
    margin-bottom: 5px;
}

footer {
    text-align: center;
    padding: 20px;
    margin-top: 30px;
    color: #7f8c8d;
    font-size: 0.9rem;
}

footer a {
    color: #3498db;
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    .input-section {
        grid-template-columns: 1fr;
    }
    
    .container {
        padding: 15px;
    }
}