body {
    margin: 0;
    font-family: system-ui, sans-serif;
    background: #f5f7fb;
}

header {
    background: #8ccaff;
    color: white;
    padding: 15px;
    text-align: center;
}

header input {
    width: 90%;
    padding: 10px;
    margin-top: 10px;
    border-radius: 8px;
    border: 2px solid #8ccaff;
}

#content {
    padding: 20px;
}

#addBtn {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: #8ccaff;
    color: white;
    font-size: 32px;
    border: none;
    cursor: pointer;
}