/* MH OS UI Shell (Branch 3) */
.mhos-ui{font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,sans-serif;color:#f4f4f7;background:#0b0b0f;max-width:520px;margin:0 auto;border-radius:18px;overflow:hidden;box-shadow:0 18px 60px rgba(0,0,0,.45)}
.mhos-top{display:flex;align-items:center;justify-content:space-between;padding:14px 14px;background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,0));border-bottom:1px solid rgba(255,255,255,.06)}
.mhos-dot{width:10px;height:10px;border-radius:50%;background:#ff3b5c;box-shadow:0 0 0 6px rgba(255,59,92,.12)}
.mhos-title{font-weight:800;letter-spacing:.04em}
.mhos-iconbtn{appearance:none;border:1px solid rgba(255,255,255,.10);background:rgba(255,255,255,.04);color:#fff;border-radius:12px;padding:8px 10px;cursor:pointer}
.mhos-main{padding:14px;display:grid;gap:12px}
.mhos-card{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);border-radius:16px;padding:14px}
.mhos-h2{font-weight:800;font-size:16px;margin:0 0 6px}
.mhos-muted{opacity:.72;line-height:1.45}
.mhos-row{display:flex;gap:10px;flex-wrap:wrap}
.mhos-btn{appearance:none;border:1px solid rgba(255,255,255,.10);background:rgba(255,255,255,.08);color:#fff;border-radius:14px;padding:10px 12px;font-weight:700;cursor:pointer}
.mhos-btn--ghost{background:transparent}
.mhos-nav{display:flex;gap:6px;padding:10px;background:rgba(0,0,0,.35);border-top:1px solid rgba(255,255,255,.06)}
.mhos-navbtn{flex:1;appearance:none;border:1px solid rgba(255,255,255,.10);background:rgba(255,255,255,.04);color:#fff;border-radius:14px;padding:10px 8px;font-weight:800;cursor:pointer}
.mhos-navbtn.is-active{background:rgba(255,255,255,.12)}