html,body{margin:0;height:100%;overflow:hidden;background:#87c6e8;font-family: ui-sans-system,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial}
  canvas{display:block;width:100%;height:100%}
  #overlay{
    position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;
    background:radial-gradient(ellipse at 50% 40%, rgba(255,255,255,0.92) 0%, rgba(215,232,245,0.88) 42%, rgba(135,198,232,0.55) 78%, rgba(135,198,232,0.2) 100%);
    backdrop-filter: blur(1px);
    text-align:center;color:#2b2f33;user-select:none;cursor:pointer;
    transition:opacity .6s ease, visibility .6s;
  }
  #overlay.hidden{opacity:0;visibility:hidden;pointer-events:none}
  .card{
    background:rgba(255,255,255,0.86);border:1px solid rgba(255,255,255,0.9);border-radius:20px;
    padding:28px 28px 22px;box-shadow:0 18px 60px rgba(45,72,90,0.18),0 2px 10px rgba(0,0,0,0.06);
    max-width:580px;margin:0 18px;
  }
  h1{margin:0 0 6px;font-size:42px;letter-spacing:-0.03em;font-weight:800;color:#244054;line-height:1}
  h1 span{font-weight:400;letter-spacing:0.12em;font-size:11px;display:block;color:#6a8aa0;margin-top:7px;text-transform:uppercase}
  .subtitle{margin:10px 0 18px;color:#5a7283;font-size:14px;line-height:1.55}
  .btn{
    display:inline-block;background:#244054;color:#fff;border-radius:999px;padding:12px 22px;font-weight:700;letter-spacing:.02em;
    box-shadow:0 8px 18px rgba(36,64,84,.24);font-size:15px;
  }
  .hints{margin:16px 0 0;display:flex;gap:8px;justify-content:center;flex-wrap:wrap}
  .hint{background:rgba(36,64,84,0.08);border-radius:999px;padding:6px 10px;font-size:12px;color:#3e5a6e;font-weight:600}
  .hint b{color:#244054}
  #hud{
    position:absolute;left:0;right:0;top:0;pointer-events:none;
    display:flex;justify-content:space-between;align-items:flex-start;padding:10px 12px;gap:8px;
  }
  .hud-left,.hud-right{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
  .hud-right{justify-content:flex-end}
  .pill{background:rgba(255,255,255,0.84);backdrop-filter:blur(8px);border-radius:999px;padding:7px 11px;font-size:11px;font-weight:700;color:#244054;box-shadow:0 4px 16px rgba(0,0,0,0.08);border:1px solid rgba(255,255,255,0.9);pointer-events:auto}
  .pill small{font-weight:600;color:#6a8294;margin-left:6px}
  .pill button{appearance:none;border:none;background:rgba(36,64,84,0.09);border-radius:999px;padding:4px 8px;font-size:11px;font-weight:700;color:#244054;cursor:pointer;margin-left:6px}
  .pill button.active{background:#244054;color:#fff}
  #audioControls{position:relative;pointer-events:auto}
  #btnAudio{appearance:none;border:1px solid rgba(255,255,255,0.9);cursor:pointer}
  #btnAudio[aria-expanded="true"]{background:#244054;color:#fff}
  .audio-panel{position:absolute;right:0;top:42px;width:188px;padding:12px 13px 11px;background:rgba(255,255,255,0.92);backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,0.95);border-radius:15px;box-shadow:0 10px 28px rgba(0,0,0,0.16);color:#244054}
  .audio-panel-title{margin-bottom:8px;font-size:11px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:#6a8294}
  .audio-panel label{display:grid;grid-template-columns:55px 1fr;gap:8px;align-items:center;margin:7px 0;font-size:11px;font-weight:700;text-transform:capitalize}
  .audio-panel input{width:100%;accent-color:#244054;cursor:pointer}
  #bar{
    position:absolute;left:50%;bottom:16px;transform:translateX(-50%);display:flex;gap:10px;align-items:center;
    background:rgba(255,255,255,0.84);backdrop-filter:blur(10px);padding:8px 12px;border-radius:999px;box-shadow:0 8px 24px rgba(0,0,0,0.12);
    font-size:11px;color:#3b5365;font-weight:600;pointer-events:none;white-space:nowrap
  }
  #bar b{color:#244054}
  @media(max-width:700px){h1{font-size:32px}.card{padding:22px 16px}#hud{padding:8px}#bar{bottom:10px;font-size:10px;padding:7px 10px}}