:root {
    --primary-color: #6a11cb;
    --secondary-color: #2575fc;
    --background-color: #f0f2f5;
    --card-background: rgba(255, 255, 255, 0.85);
    --text-color: #333;
    --light-text-color: #fff;
    --border-color: #ddd;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --font-family: 'Poppins', sans-serif;
}

body {
    font-family: var(--font-family);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--text-color);
}

.container {
    background: var(--card-background);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px var(--shadow-color);
    text-align: center;
    width: 90%;
    max-width: 500px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

h1 {
    font-weight: 600;
    margin-bottom: 2rem;
    font-size: 2rem;
}

.converter {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.converter-row {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.converter input,
.converter select {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-size: 1rem;
    font-family: var(--font-family);
    background-color: #fff;
    transition: all 0.3s ease;
}

.converter input:focus,
.converter select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(106, 17, 203, 0.2);
}

.swap-icon {
    cursor: pointer;
    font-size: 1.5rem;
    color: var(--primary-color);
    transition: transform 0.3s ease;
}

.swap-icon:hover {
    transform: rotate(180deg);
}

#convert-btn {
    width: 100%;
    padding: 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--light-text-color);
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

#convert-btn:hover {
    box-shadow: 0 5px 15px rgba(37, 117, 252, 0.4);
    transform: translateY(-2px);
}

#result {
    margin-top: 1.5rem;
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--primary-color);
    min-height: 2rem;
    word-wrap: break-word;
}

/* Responsive Design */
@media (max-width: 600px) {
    .container {
        padding: 2rem;
    }

    h1 {
        font-size: 1.8rem;
    }

    .converter-row {
        flex-direction: column;
    }
}