:where([class^="ri-"])::before { content: "\f3c2"; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    width: 375px;
    margin: 0 auto;
    min-height: 100vh;
    position: relative;
    background-color: #FAFAFA;
    font-size: 16px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
    overflow-x: hidden;
}
html {
    background-color: #E5E5E5;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
}
.message-bubble {
    max-width: 80%;
    word-wrap: break-word;
}
.message-bubble.sent {
    margin-left: auto;
    background-color: #3B82F6;
    color: white;
    border-radius: 16px 16px 0 16px;
}
.message-bubble.received {
    margin-right: auto;
    background-color: white;
    color: #1F2937;
    border-radius: 16px 16px 16px 0;
}