*{box-sizing:border-box}
:root{--text:#111827;--muted:#64748b;--border:#e2e8f0;--red:#dc0000;--blue:#2563eb;--green:#10b981;--orange:#f97316;--shadow:0 18px 40px rgba(15,23,42,.12)}
body{margin:0;min-height:100vh;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--text);background:linear-gradient(180deg,#f8fafc,#eef2ff)}
.app{max-width:820px;margin:0 auto;padding:10px}
.quiz-card{background:#fff;border:1px solid var(--border);border-radius:22px;box-shadow:var(--shadow);padding:16px}
.question-top{display:flex;justify-content:space-between;align-items:flex-start;gap:10px}
.question-id{display:inline-flex;padding:7px 11px;border-radius:999px;color:#1d4ed8;background:#dbeafe;font-weight:950}
.question-type{margin-top:8px;color:var(--muted);font-weight:800;font-size:.9rem}
.favorite{width:46px;height:46px;border-radius:15px;border:1px solid #fed7aa;background:#fff7ed;color:#f59e0b;font-size:1.6rem}
.progress-bar{height:8px;background:#e2e8f0;border-radius:999px;overflow:hidden;margin:16px 0}
.progress-bar div{height:100%;width:0%;border-radius:999px;background:linear-gradient(90deg,var(--red),var(--orange))}
h1{font-size:clamp(1.25rem,5vw,2rem);line-height:1.28;margin:0 0 16px;letter-spacing:-.025em}
.answers{display:grid;gap:10px}
.answer,.answer-like{display:grid;grid-template-columns:32px 1fr;gap:10px;align-items:flex-start;width:100%;text-align:left;padding:14px;border-radius:18px;background:#fff;border:1px solid var(--border);color:var(--text);font:inherit;font-weight:700;box-shadow:none}
.answer input{width:22px;height:22px;margin-top:1px;accent-color:var(--red)}
.answer.correct{background:#ecfdf5;border-color:#34d399;color:#064e3b}
.answer.wrong{background:#fff1f2;border-color:#fb7185;color:#7f1d1d}
.answer-like{margin-top:10px;cursor:pointer}
textarea{width:100%;min-height:110px;border:1px solid var(--border);border-radius:16px;padding:12px;font:inherit}
.feedback{margin:14px 0 0;padding:12px 14px;border-radius:16px;font-weight:900}
.feedback.success{background:#d1fae5;color:#047857}.feedback.danger{background:#fee2e2;color:#b91c1c}.feedback.warn{background:#fef3c7;color:#a16207}
.solution{margin-top:14px;padding:14px;border-radius:18px;background:#f8fafc;border:1px solid var(--border)}
.solution h3{margin:0 0 8px}.solution ul{margin:0;padding-left:22px}
.bottom-nav{position:sticky;bottom:8px;margin-top:12px;padding:8px;display:grid;grid-template-columns:48px 1fr 48px 48px;gap:8px;border-radius:20px;background:rgba(255,255,255,.92);border:1px solid var(--border);backdrop-filter:blur(14px)}
button{border:0;border-radius:14px;padding:11px 13px;font-weight:950;cursor:pointer;color:white;background:linear-gradient(135deg,#7c3aed,var(--blue))}
.round{width:48px;height:48px;padding:0;border-radius:16px;font-size:1.25rem}.primary{background:linear-gradient(135deg,var(--green),#06b6d4)}.orange{background:linear-gradient(135deg,#f59e0b,var(--orange))}
footer{padding:10px 4px;color:var(--muted);font-size:.82rem}.hidden{display:none!important}
@media(max-width:600px){.app{padding:8px}.quiz-card{border-radius:20px;padding:14px}.question-type{font-size:.82rem}.answer{padding:13px}}