body {
    font-family: Arial, sans-serif;
    background-color: #e0f7fa;
    margin: 0;
    padding: 20px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}
.container {
    max-width: 600px;
    margin: auto;
    background: #0277bd;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    color: white;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 100%;
}
h1 {
    text-align: center;
}
.intro-text {
    text-align: center;
    margin-bottom: 20px;
}
.calculator, .info-box {
    background: #0288d1;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
}
.calculator input {
    width: 100%;
    padding: 10px;
    margin: 5px 0;
    border-radius: 4px;
    border: none;
    background-color: #b3e5fc;
    color: #01579b;
}
.calculator button {
    width: 100%;
    padding: 10px;
    background-color: #ffeb3b;
    color: #0277bd;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
}
.calculator button:hover {
    background-color: #fbc02d;
}
.info-box p {
    margin: 0 0 10px;
}
.footer-text {
    color: white;
    text-align: center;
    padding: 10px;
    font-size: 14px;
    border-radius: 0 0 8px 8px;
    background: #0277bd;
}
.footer-text a {
    color: white;
    text-decoration: none;
}
.footer-text a:hover {
    color: #ffeb3b;
}
@media (max-width: 600px) {
    .container {
        padding: 10px;
    }
    .calculator, .info-box {
        padding: 10px;
    }
    .calculator h2 {
        font-size: 16px;
    }
    .calculator input {
        padding: 8px;
        margin: 3px 0;
    }
    .calculator button {
        padding: 8px;
        font-size: 14px;
    }
}