:root{--bg:#f8fafc;--surface:#fff;--text:#0f172a;--text-dim:#64748b;--brand:#16a34a;--brand-dim:#dcfce7;--border:#e2e8f0}@media (prefers-color-scheme:dark){:root{--bg:#0b1120;--surface:#111a2e;--text:#e2e8f0;--text-dim:#94a3b8;--brand:#22c55e;--brand-dim:#14301f;--border:#1e293b}}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;font-family:system-ui,-apple-system,PingFang SC,Microsoft YaHei,sans-serif}.app{flex-direction:column;max-width:560px;height:100%;margin:0 auto;display:flex}.app-header{padding:calc(12px + env(safe-area-inset-top)) 16px 12px;background:var(--surface);border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;display:flex}.app-header h1{margin:0;font-size:18px;font-weight:600}.sync-badge{color:var(--text-dim);background:var(--bg);border:1px solid var(--border);border-radius:999px;padding:2px 10px;font-size:12px}.app-main{flex:1;justify-content:center;align-items:center;padding:24px;display:flex}.placeholder{color:var(--text-dim);font-size:15px}.tab-bar{background:var(--surface);border-top:1px solid var(--border);padding-bottom:env(safe-area-inset-bottom);grid-template-columns:repeat(5,1fr);display:grid}.tab{appearance:none;color:var(--text-dim);cursor:pointer;background:0 0;border:0;flex-direction:column;align-items:center;gap:2px;padding:8px 0 10px;font-size:11px;display:flex}.tab svg{width:24px;height:24px}.tab-active{color:var(--brand)}