#ct3-calculator {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    max-width: 100%;
    margin: 20px auto;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
    background: #fff;
    overflow: hidden;
}
.ct3-tabs {
    display: flex;
    background: #f1f1f1;
    border-bottom: 1px solid #ddd;
    flex-wrap: wrap;
}
.ct3-tab {
    flex: 1;
    padding: 15px;
    text-align: center;
    cursor: pointer;
    font-weight: 600;
    color: #555;
    min-width: 120px;
    transition: background 0.3s;
}
.ct3-tab:hover { background: #e9e9e9; }
.ct3-tab.active {
    background: #fff;
    color: #0073aa;
    border-top: 3px solid #0073aa;
}
.ct3-content {
    padding: 25px;
    display: none;
}
.ct3-content.active { display: block; }

.ct3-form-group { margin-bottom: 15px; }
.ct3-form-group label { display: block; margin-bottom: 5px; font-weight: 500; }
.ct3-form-group select, 
.ct3-form-group input {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 16px;
    box-sizing: border-box;
}
.ct3-result-box {
    background: #e7f4ff;
    border: 1px solid #bde0ff;
    padding: 20px;
    border-radius: 6px;
    margin-top: 20px;
    text-align: center;
}
.ct3-result-value {
    font-size: 24px;
    font-weight: bold;
    color: #0073aa;
    margin: 10px 0;
}
.ct3-disclaimer {
    padding: 15px;
    font-size: 12px;
    color: #777;
    margin-top: 0;
    font-style: italic;
    background: #f9f9f9;
    border-top: 1px solid #eee;
}
.ct3-btn {
    background: #0073aa;
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 4px;
    cursor: pointer;
    width: 100%;
    font-size: 16px;
    margin-top: 10px;
}
.ct3-btn:hover { background: #005177; }