@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@200;300;400;500;600;700&display=swap');

* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

.container {
    height: 100vh;
    width: 100%;
    padding: 30px;
    background: linear-gradient(#e9eafa, #a1a3c9);
}

.todo-box {
    width: 100%;
    max-width: 520px;
    background: #f6f7ff;
    border-radius: 15px;
    margin: 100px auto 20px;
    padding: 40px 30px 70px;
}

h2 {
    margin-left: 10px;
}

.row {
    margin: 25px 0 25px;
    background-color: #eff0fc;
    border-radius: 20px 35px 35px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-left: 20px;
}

#input-box {
    outline: none;
    border: none;
    background: transparent;
    font-weight: 14px;
    padding: 10px;
    width: 300px;
}

button {
    border: none;
    outline: none;
    background: #a1a3c9;
    padding: 14px 50px;
    border-radius: 35px;
    color: #f6f7ff;
    cursor: pointer;
    font-size: 16px;
}

li {
    position: relative;
    list-style: none;
    cursor: pointer;
    user-select: none;
    padding: 12px 8px 12px 50px;
    font-size: 17px;
}

li.checked {
    color: #555;
    text-decoration: line-through;
}

span {
    position: absolute;
    right: 0;
    top: 10px;
    width: 40px;
    height: 40px;
    font-size: 22px;
    color: #000005;
    line-height: 40px;
    text-align: center;
    border-radius: 50%;  
}

span:hover {
    background: #e9eafa;
}

  @media (max-width: 768px) {
    .container {
        padding: 20px;
    }
    
    .todo-box {
        margin: 50px auto 20px;
        padding: 30px;
    }
    
    button {
        padding: 12px 30px;
    }
    
    li {
        font-size: 16px;
        padding: 10px;
    }
    
    span {
        width: 30px;
        height: 30px;
        font-size: 18px;
        line-height: 30px;
    }
}