:root{--bg:#0e0f12;--surface:#16181d;--surface-2:#1e2128;--border:#2a2e37;--text:#f3f4f6;--text-dim:#9aa0ab;--accent:#4a8cff;--accent-press:#3a72d6;--ok:#34c759;--warn:#ff9f0a;--err:#ff453a;--radius:14px}*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}body,html{background:var(--bg);color:var(--text);font-family:-apple-system,system-ui,Segoe UI,Roboto,Apple SD Gothic Neo,Malgun Gothic,sans-serif;-webkit-font-smoothing:antialiased}.app{max-width:480px;margin:0 auto;min-height:100dvh;display:flex;flex-direction:column}button{font:inherit;cursor:pointer}.btn{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;padding:16px;border:none;border-radius:var(--radius);background:var(--accent);color:#fff;font-size:17px;font-weight:700;transition:background .15s,opacity .15s}.btn:active{background:var(--accent-press)}.btn:disabled{opacity:.45}.btn-ghost{background:var(--surface-2);color:var(--text)}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius)}.muted{color:var(--text-dim)}