styles.css

body {
    font-family:'Arial Black';
    background-color: #b0c4de;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.container {
    background: #d3d3d3;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    text-align: center;
}

h1 {
    color: #333;
    margin-bottom: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    margin-bottom: 20px;
}

label {
    margin: 5px 0;
}

.rect-input {
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
    margin-bottom: 10px;
    transition: border-color 0.3s, background-color 0.3s;
    cursor: pointer;
    width: 100%;
    max-width: 200px;
    text-align: center;
}

.rect-input:focus {
    border-color: #007bff;
    background-color: #e9f1ff;
}

.rect-button {
    padding: 10px 20px;
    background-color: #000;
    color: white;
    border: none;
    border-radius: 5px;
    transition: background-color 0.3s, transform 0.3s;
    cursor: pointer;
    margin-top: 10px;
}

.rect-button:hover {
    background-color: #5e209dec;
    transform: scale(1.05);
}

.result-container {
    display: flex;
    justify-content: center;
    align-items: center;
}

.result-box {
    background-color: #333;
    color: white;
    padding: 20px;
    border-radius: 10px;
    margin: 0 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.result-number {
    font-size: 2em;
    display: block;
}

.result-label {
    font-size: 1em;
    display: block;
}