.wsu-calculator-modern, .wsu-calculator-glass, .wsu-calculator-default {
    max-width: 600px;
    margin: 20px auto;
    padding: 25px;
    background: #f7f5ef;
    border-radius: 12px;
    border: 1px solid #e0dcd3;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
.wsu-calculator-modern .calc-title,
.wsu-calculator-glass .calc-title {
    color: #A87832;
    border-bottom: 2px solid #A87832;
    padding-bottom: 10px;
}
.wsu-calculator-modern .calc-section,
.wsu-calculator-glass .calc-section {
    margin: 20px 0;
}
.wsu-calculator-modern select,
.wsu-calculator-modern input,
.wsu-calculator-glass select,
.wsu-calculator-glass input,
.wsu-calculator-default select,
.wsu-calculator-default input {
    width: 100%;
    padding: 10px;
    border-radius: 8px;
    border: 1px solid #ccc;
    margin: 5px 0 10px;
}
.wsu-calculator-modern .calc-feature,
.wsu-calculator-glass .calc-feature {
    display: block;
    padding: 6px 0;
    cursor: pointer;
}
.wsu-calculator-modern .calc-price-display,
.wsu-calculator-glass .calc-price-display,
.wsu-calculator-default .calc-price-display {
    font-size: 28px;
    font-weight: bold;
    color: #A87832;
}
.wsu-calculator-modern .calc-whatsapp-btn,
.wsu-calculator-glass .calc-whatsapp-btn,
.wsu-calculator-default .calc-whatsapp-btn {
    background: #25D366;
    color: #fff;
    border: none;
    padding: 14px 24px;
    border-radius: 30px;
    font-size: 18px;
    cursor: pointer;
    width: 100%;
    margin-top: 10px;
    transition: background 0.2s;
}
.wsu-calculator-modern .calc-whatsapp-btn:hover,
.wsu-calculator-glass .calc-whatsapp-btn:hover,
.wsu-calculator-default .calc-whatsapp-btn:hover {
    background: #1ebe5a;
}
.calc-message {
    margin-top: 10px;
    padding: 10px;
    background: #e7f3e7;
    border-radius: 5px;
    color: #155724;
    border: 1px solid #c3e6cb;
}