body {
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: #f4f7fb;
}

nav {
    background: #0d47a1;
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 50px;
}

.logo {
    font-size: 28px;
    font-weight: bold;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 30px;
    margin: 0;
    padding: 0;
}

nav ul li a {
    color: white;
    text-decoration: none;
    font-size: 18px;
}

nav ul li a:hover {
    color: gold;
}

.hero {
    text-align: center;
    padding: 80px 20px;
}

.hero h1 {
    color: #0d47a1;
    font-size: 48px;
    margin-bottom: 15px;
}

.hero p {
    color: #555;
    font-size: 24px;
}

button {
    background-color: #0d47a1;
    color: white;
    border: none;
    padding: 15px 30px;
    font-size: 18px;
    border-radius: 8px;
    cursor: pointer;
}

button:hover {
    background-color: #1565c0;
}
.calculator{
    width:400px;
    margin:30px auto;
    background:white;
    padding:25px;
    border-radius:10px;
    box-shadow:0 0 10px rgba(0,0,0,0.15);
}

.calculator label{
    display:block;
    text-align:left;
    margin-top:15px;
    font-weight:bold;
}

.calculator input{
    width:100%;
    padding:10px;
    margin-top:5px;
    border:1px solid #ccc;
    border-radius:6px;
    font-size:16px;
    box-sizing:border-box;
}

#result{
    width:400px;
    margin:30px auto;
    background:#ffffff;
    padding:20px;
    border-radius:10px;
    box-shadow:0 0 10px rgba(0,0,0,0.15);
}