body {
    font-family: 'Roboto', sans-serif;
    margin: 0;
    padding: 0;
    background: linear-gradient(135deg, #3498db, #8e44ad);
    background-size: cover;
    color: #ecf0f1;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
}

.container {
    display: flex;
    flex-direction: column;
    width: 90%;
    max-width: 400px;
    background-color: rgba(255, 255, 255, 0.9);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.2);
}

h1 {
    text-align: center;
    color: #2ecc71;
    margin-bottom: 20px;
}

p {
    text-align: center;
    color: #6b6b6b;
    margin: 10px 0;
}

#equation {
    font-size: 1.2rem;
    margin-bottom: 20px;
}

form {
    text-align: center;
    margin-top: 20px;
    margin-bottom: 20px;
    color: #6b6b6b;
}

span {
    display: inline-block;
    margin: 0 10px;
}

input {
    font-size: 1rem;
    padding: 10px;
    margin: 0 10px 10px 10px;
    border: 1px solid #cccccc;
    border-radius: 4px;
    box-sizing: border-box;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    color: #2c3e50;
}

input:hover,
input:focus {
    border-color: #3498db;
}

form div {
    margin-top: 20px;
}

button {
    background-color: #e74c3c;
    color: #ecf0f1;
    padding: 12px 24px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    margin: 0 auto;
    display: block;
}

button:hover {
    background-color: #c0392b;
}

#output_text {
    margin-top: 20px;
    text-align: center;
    color: #404040;
}

#outputValue {
    margin-top: 10px;
    font-weight: bold;
    font-size: 1.2em;
    color: #2ecc71;
}