:root{--bg: #f4f5f7;--card: #ffffff;--ink: #16181d;--muted: #6b7280;--line: #e5e7eb;--primary: #1668e3;--ok: #0a7d33;--bad: #c0392b;--radius: 14px;--tap: 52px}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--ink);-webkit-text-size-adjust:100%}.app{display:flex;flex-direction:column;height:100dvh;max-width:640px;margin:0 auto;background:var(--bg)}.app-main{flex:1;overflow-y:auto;-webkit-overflow-scrolling:touch}.tabbar{display:grid;grid-template-columns:repeat(4,1fr);background:var(--card);border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom)}.tabbar-btn{min-height:var(--tap);border:0;background:none;padding:8px 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