* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif;
}

body {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, #667eea, #764ba2);
}

.converter-container {
    background: white;
    padding: 30px;
    border-radius: 15px;
    width: 320px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    display: flex;
    flex-direction: column;
    gap: 15px;
}

h1 {
    text-align: center;
}

label {
    font-weight: bold;
}

input,
select {
    padding: 8px;
    border-radius: 8px;
    border: 1px solid #ccc;
}

input:focus,
select:focus {
    outline: none;
    border-color: #667eea;
}

.selects {
    display: flex;
    justify-content: space-between;
    gap: 10px;
}

button {
    padding: 10px;
    border: none;
    border-radius: 10px;
    background-color: #667eea;
    color: white;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #5563c1;
}

#result {
    text-align: center;
    font-size: 18px;
    font-weight: bold;
}