:root{--bg: #f3f4fb;--card: #ffffff;--ink: #171a24;--muted: #6c7390;--faint: #99a0ba;--line: #e7e9f5;--accent: #4f46e5;--accent-2: #7c3aed;--accent-soft: #eef0ff;--root: #f59e0b;--shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 14px 34px -20px rgba(16, 24, 40, .4);--radius: 20px}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,sans-serif;background:radial-gradient(900px 420px at 8% -10%,rgba(99,102,241,.16),transparent 65%),radial-gradient(760px 380px at 96% 4%,rgba(236,72,153,.1),transparent 60%),var(--bg);min-height:100vh}button{font:inherit}.topbar{position:sticky;top:0;z-index:20;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px 28px;padding:16px clamp(16px,4vw,36px);background:#f8f9fddb;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid 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