.input-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--dark);
}

input[type="number"], input[type="checkbox"] {
    width: 95%;
    padding: 12px 15px;
    border: 1px solid #ced4da;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s, box-shadow 0.3s;
}

input[type="number"]:focus {
    border-color: var(--accent);
    outline: none;
    box-shadow: 0 0 0 3px rgba(72, 149, 239, 0.2);
}

select {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ced4da;
    border-radius: 8px;
    font-size: 16px;
    background-color: white;
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 15px center;
    background-size: 15px;
    transition: border-color 0.3s, box-shadow 0.3s;
}

select:focus {
    border-color: var(--accent);
    outline: none;
    box-shadow: 0 0 0 3px rgba(72, 149, 239, 0.2);
}

button {
    width: 100%;
    padding: 14px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s, transform 0.2s;
    margin-top: 10px;
}

button:hover {
    background: var(--secondary);
}

button:active {
    transform: scale(0.98);
}

.checkbox-container {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
}

.checkbox-container input[type="checkbox"] {
    width: auto;
    margin-right: 10px;
}

.openings-container {
    margin-top: 15px;
    border: 1px solid #dee2e6;
    border-radius: 8px;
    padding: 15px;
    background-color: #f8f9fa;
}

.opening-item {
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
    align-items: center;
}

.opening-item input {
    flex: 1;
}

.remove-opening {
    background: #dc3545;
    color: white;
    border: none;
    border-radius: 5px;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.add-opening {
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 5px;
    padding: 5px 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
    margin-top: 10px;
}

@media (max-width: 768px) {
    .calc-container {
        padding: 20px;
    }
    
    .opening-item {
        flex-direction: column;
        align-items: stretch;
    }
}