HTML/CSS - OneUI Search Widget Online Editor and JavaScript Compiler

html
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>OneUI Search Widget</title>
    <link href="https://fonts.googleapis.com/icon?family=Material+Icons+Round" rel="stylesheet">
    <link href="https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&display=swap" rel="stylesheet">
    <style>
        /* OneUI Design System */
        :root {
            --primary: #0066FF;
            --primary-hover: #0052CC;
            --surface: #FFFFFF;
            --background: #F8FAFF;
            --text-primary: #1C1C1E;
            --text-secondary: #636366;
            --divider: #E5E5EA;
            --overlay-bg: rgba(0, 0, 0, 0.4);
            --elevation-1: 0 1px 3px rgba(0, 0, 0, 0.08);
            --elevation-2: 0 4px 12px rgba(0, 0, 0, 0.12);
            --transition: cubic-bezier(0.25, 0.8, 0.25, 1);
            --blur-bg: rgba(255, 255, 255, 0.7);
            --radius-sm: 12px;
            --radius-lg: 20px;
        }
        
        .dark-theme {
css
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