body {
    font-family: Arial;
    background: #f4f6f9;
}

.container {
    width: 400px;
    margin: 100px auto;
    background: white;
    padding: 20px;
    border-radius: 10px;
}

input {
    width: 100%;
    margin: 8px 0;
    padding: 10px;
}

button {
    padding: 10px;
    width: 100%;
    background: blue;
    color: white;
    border: none;
    cursor: pointer;
}

.note-card {
    background: #fff;
    padding: 10px;
    margin: 10px 0;
    border-radius: 8px;
}