*{margin:0;padding:0;box-sizing:border-box}html,body,#root{width:100%;height:100%}body{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;min-width:320px;min-height:100vh}html,body,#root{height:100%;margin:0}body{font-family:Segoe UI,sans-serif;background:#f5f7fb}.app-container{width:100%;min-height:100vh;padding:30px 60px;box-sizing:border-box}.title{text-align:center;font-size:32px;margin-top:10px}.subtitle{text-align:center;color:#555;margin-bottom:25px}.dark{background:#0f172a;color:#f1f5f9;min-height:100vh}.dark .subtitle{color:#cbd5f5}.dark h3{color:#e2e8f0}