:root{
  --bg:#f1f3f6; --card:#ffffff; --ink:#2d3748; --muted:#718096;
  --accent:#3182ce; --ok:#38a169; --bad:#e53e3e; --border:#cbd5e0;
  --primary:#3182ce; --secondary:#805ad5; --success:#38a169; --warning:#d69e2e;
  --light-bg:#edf2f7; --text-light:#718096; --text-dark:#1a202c;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0; font:18px/1.6 system-ui, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  color:var(--ink);
  background: linear-gradient(135deg, #f1f3f6 0%, #e2e8f0 100%);
  min-height: 100vh;
}
.wrap{max-width:960px;margin:32px auto;padding:24px}
.top h1{margin:0 0 12px; font-size:2.5rem; font-weight:700; color:var(--text-dark); line-height:1.2}
.sub{margin:0 0 20px;color:var(--muted); font-size:1.1rem; line-height:1.5}
.stats{display:flex;gap:16px;align-items:center;margin:16px 0 32px}
#progressBar{flex:1;height:12px;border-radius:999px;background:var(--light-bg);overflow:hidden;border:1px solid var(--border)}
#progressFill{height:100%;width:0%;background:linear-gradient(90deg,var(--primary),var(--secondary)); transition:width 0.3s ease}
#score{min-width:140px;text-align:right;color:var(--text-dark); font-weight:600; font-size:1.1rem}
.card{background:var(--card);border:1px solid var(--border);border-radius:20px;padding:28px;box-shadow:0 4px 20px rgba(0,0,0,0.08); transition:box-shadow 0.3s ease}
.prompt .label{color:var(--muted);margin-bottom:12px; font-size:1.1rem; font-weight:500}
.text{
  padding:24px; background:var(--light-bg); border:2px solid var(--border); border-radius:16px;
  min-height:120px; font-size:1.4rem; line-height:2; word-wrap:break-word; transition:border-color 0.3s ease;
}
.char{cursor:pointer; padding:4px 2px; border-radius:8px; transition:all 0.2s ease; position:relative; min-width:24px; text-align:center}
.char.space{cursor:default; min-width:8px}
.char:hover{background:rgba(49,130,206,0.12); transform:scale(1.05)}
.char.correct{background:rgba(56,161,105,0.15); outline:2px solid var(--success); transform:scale(1.1); animation:correctPulse 0.6s ease}
.char.wrong{background:rgba(229,62,62,0.15); outline:2px solid var(--bad); transform:scale(1.1); animation:wrongShake 0.4s ease}

@keyframes correctPulse {
  0% { transform: scale(1.1); }
  50% { transform: scale(1.2); }
  100% { transform: scale(1.1); }
}

@keyframes wrongShake {
  0%, 100% { transform: translateX(0) scale(1.1); }
  25% { transform: translateX(-2px) scale(1.1); }
  75% { transform: translateX(2px) scale(1.1); }
}
.status{margin-top:16px;color:var(--text-dark); font-size:1.1rem; font-weight:500}
.feedback{margin-top:16px;padding:16px 20px;border-radius:12px;border:2px solid var(--border);background:var(--light-bg); font-size:1.1rem; line-height:1.5; transition:all 0.3s ease}
.feedback.ok{border-color:var(--success); background:rgba(56,161,105,0.08); color:var(--text-dark)}
.feedback.bad{border-color:var(--bad); background:rgba(229,62,62,0.08); color:var(--text-dark)}
.hidden{display:none}
.actions{display:flex;gap:12px;margin-top:20px;align-items:center}
.next,.restart,.ghost{padding:14px 20px;border-radius:12px;border:2px solid var(--border);background:var(--card);color:var(--ink);cursor:pointer; font-size:1rem; font-weight:500; transition:all 0.3s ease}
.next:disabled,.ghost:disabled{opacity:.5;cursor:not-allowed}
.next{border-color:var(--primary); background:var(--primary); color:white}
.next:enabled:hover{background:var(--secondary); border-color:var(--secondary); transform:translateY(-2px); box-shadow:0 4px 12px rgba(49,130,206,0.3)}
.ghost{opacity:.85; border-color:var(--muted)}
.ghost:hover{background:var(--light-bg); transform:translateY(-1px)}
.restart:hover{background:var(--light-bg); transform:translateY(-1px)}
.compare{margin-top:28px;background:var(--light-bg);border:2px solid var(--border);border-radius:16px;padding:20px 24px; box-shadow:0 2px 8px rgba(0,0,0,0.05)}
.compare h2{margin:0 0 16px 0; font-size:1.5rem; font-weight:600; color:var(--text-dark)}
.compare .cols{display:grid;gap:20px;grid-template-columns:1fr 1fr}
.compare h3{margin:0 0 8px 0; font-size:1.2rem; font-weight:600; color:var(--text-dark)}
.compare p{font-size:1.1rem; line-height:1.6; color:var(--ink)}
.foot{margin-top:24px;color:var(--muted); font-size:1rem; text-align:center}
@media (max-width:700px){
  .wrap{padding:16px; margin:16px auto}
  .top h1{font-size:2rem}
  .text{font-size:1.2rem; padding:20px}
  .char{min-width:20px; padding:3px 1px}
  .actions{flex-direction:column; gap:8px}
  .next,.restart,.ghost{width:100%; text-align:center}
  .compare .cols{grid-template-columns:1fr}
  .stats{flex-direction:column; gap:12px; align-items:stretch}
  #score{text-align:center}
}