*{box-sizing:border-box}:root{--bg: #f5f6f8;--card: #ffffff;--border: #e2e5ea;--text: #1f2430;--muted: #7a8194;--primary: #4f6ef7;--primary-dark: #3b56d9;--danger: #e5484d;--ok: #2fa36b;--warn: #d79715}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:var(--bg);color:var(--text);font-size:15px}.btn{padding:8px 14px;border:1px solid var(--border);border-radius:8px;background:var(--card);color:var(--text);font-size:14px;cursor:pointer;transition:all .15s 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