body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    display: flex;
    justify-content: center;
    background-color: #f9ffff;
}

.calculator-card {
    background: transparent;
    border-radius: 8px;
    max-width: 400px;
    width: 100%;
}

h2 { color: #333; margin-bottom: 20px; text-align: center; }

.input-group {
    margin-bottom: 15px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

input {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
    font-size: 1.2rem;
}

button {
    width: 100%;
    padding: 12px;
    background-color: #28a745;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
}

button:hover {
    background-color: #218838;
}

.results {
    margin-top: 20px;
    padding-top: 15px;
    border-top: 2px solid #eee;
}

.result-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
    color: #000000;
}

.total {
    font-weight: bold;
    color: #28a745;
    font-size: 18px;
    margin-top: 15px;
}
/* Add this to your existing CSS */
.toggle-container {
    display: flex;
    gap: 10px;
    margin-bottom: 25px;
}

.toggle-btn {
    flex: 1;
    padding: 10px;
    background-color: #e9ecef;
    color: #495057;
    border: 1px solid #ced4da;
    border-radius: 4px;
    cursor: pointer;
    font-weight: bold;
    transition: 0.3s;
}

.toggle-btn:hover {
    background-color: #218838;
    color: white;
}

.toggle-btn.active {
    background-color: #28a745;
    color: white;
    border-color: #28a745;
}

.calc-btn {
    margin-top: 10px;
}

.error {
    border: 1.5px solid #d9534f !important;
    background-color: #fff9f9;
}