:root {
    --primary-color: #2196F3;
    --text-color: #333;
    --border-color: #e0e0e0;
    --background-color: #fff;
    --slider-background: #e0e0e0;
}

.uf-calculator {
    max-width: 600px;
    margin: 2rem auto;
    padding: 2rem;
    background: var(--background-color);
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.calculator-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.input-group label {
    font-size: 0.9rem;
    color: var(--text-color);
    font-weight: 500;
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-wrapper input[type="number"] {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s;
}

.input-wrapper input[type="number"]:focus {
    border-color: var(--primary-color);
}

.input-wrapper .currency {
    position: absolute;
    right: 1rem;
    color: #666;
}

.unit-toggles {
    display: flex;
    gap: 0.25rem;
    margin-left: 0.5rem;
}

.unit-toggle {
    padding: 0.4rem 0.8rem;
    border: 1px solid var(--border-color);
    background: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.8rem;
    transition: all 0.3s;
}

.unit-toggle.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.input-wrapper input[type="range"] {
    width: 100%;
    height: 4px;
    background: var(--slider-background);
    border-radius: 2px;
    outline: none;
    -webkit-appearance: none;
}

.input-wrapper input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.2s;
}

.input-wrapper input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

.range-value {
    margin-left: 1rem;
    font-size: 0.9rem;
    color: var(--text-color);
    min-width: 3rem;
}

.result-container {
    text-align: center;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.result-container h3 {
    font-size: 1rem;
    color: var(--text-color);
    margin-bottom: 1rem;
}

.result {
    font-size: 2rem;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.conditions-btn {
    background: none;
    border: none;
    color: var(--primary-color);
    text-decoration: underline;
    cursor: pointer;
    font-size: 0.9rem;
    transition: opacity 0.3s;
}

.conditions-btn:hover {
    opacity: 0.8;
}

@media (max-width: 480px) {
    .uf-calculator {
        padding: 1.5rem;
        margin: 1rem;
    }
    
    .unit-toggles {
        flex-direction: column;
        margin-left: 0.25rem;
    }
    
    .unit-toggle {
        padding: 0.3rem 0.6rem;
    }
    
    .result {
        font-size: 1.5rem;
    }
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
}

.modal-content {
    position: relative;
    background-color: var(--background-color);
    margin: 15% auto;
    padding: 2rem;
    width: 80%;
    max-width: 600px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.close-modal {
    position: absolute;
    right: 1rem;
    top: 1rem;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-color);
    transition: color 0.3s;
}

.close-modal:hover {
    color: var(--primary-color);
}

.modal-text {
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--text-color);
}

.modal-text p {
    margin-bottom: 1rem;
}