:root{--bg: #0f1115;--fg: #f2f3f5;--muted: #9aa0a8;--line: #262a31;--panel: #171a20;--input: #1d2129;--info: #28a6f5;--success: #4bb543;--warning: #dfb200;--error: #ff4433;--radius: 10px;color-scheme:dark}*{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--bg);color:var(--fg);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}code,pre,textarea.code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,Liberation Mono,monospace}a{color:var(--info)}button{font-family:inherit;cursor:pointer}.container{max-width:960px;margin:0 auto;padding:0 20px}.panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:20px}