I'm trying to change the colour of a input area placeholder in html5 using a separate CSS stylesheet but it's not working
#Search { margin: auto; display: block; background-color: royalblue; color: white; border-radius: 2500px; border: 3px solid white; padding: 20px; font-size: 30px; font-weight: 300; font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif; ::placeholder { color: white; <div> <h1 id="Start"> webui </h1> </div> <br> <input type="text" id="search" placeholder="Search" /> I tried the codes but it didn't work I also tried a web kit but I'm not sure if I did it write and I'm a beginner