:root{--bg:#0d1117;--panel:#161b22;--panel2:#1d2430;--border:#303846;--text:#f1f5f9;--muted:#9aa6b2;--accent:#5b9cff;--green:#36d399;--red:#ff647c;--yellow:#f5c451;--shadow:0 10px 30px rgba(0,0,0,.25)}*{box-sizing:border-box}html{background:var(--bg)}body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.5}.topbar{min-height:64px;border-bottom:1px solid var(--border);background:#10151d;display:flex;align-items:center;justify-content:space-between;padding:0 24px;gap:16px}.brand{color:var(--text);text-decoration:none;font-weight:800;font-size:1.1rem}.topbar nav{display:flex;align-items:center;gap:18px;color:var(--muted)}a{color:var(--accent)}.container{max-width:1100px;margin:0 auto;padding:28px 18px 60px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px}.card{background:var(--panel);border:1px solid var(--border);border-radius:16px;padding:20px;box-shadow:var(--shadow)}.card h2,.card h3{margin-top:0}.actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}.button,button,input[type=submit]{border:0;border-radius:10px;padding:12px 16px;background:var(--accent);color:#fff;font:inherit;font-weight:700;cursor:pointer;text-decoration:none;display:inline-flex;justify-content:center;align-items:center;min-height:44px}.button.secondary,button.secondary{background:var(--panel2);border:1px solid var(--border)}.button.danger,button.danger{background:#7d2636}.button.success{background:#176b50}.button:disabled,button:disabled{opacity:.5;cursor:not-allowed}label{display:block;margin:14px 0 6px;font-weight:700}input,textarea,select{width:100%;background:#0f141b;color:var(--text);border:1px solid var(--border);border-radius:10px;padding:12px;font:inherit}textarea{min-height:100px;resize:vertical}.muted{color:var(--muted)}.flash{padding:13px 16px;border-radius:10px;margin-bottom:18px;background:var(--panel2);border:1px solid var(--border)}.flash.success{border-color:var(--green)}.flash.error{border-color:var(--red)}.flash.warning{border-color:var(--yellow)}.table-wrap{overflow-x:auto}.table{width:100%;border-collapse:collapse}.table th,.table td{padding:12px;border-bottom:1px solid var(--border);text-align:left;vertical-align:top}.badge{display:inline-block;padding:4px 9px;border-radius:999px;background:var(--panel2);font-size:.85rem}.badge.green{color:var(--green)}.badge.red{color:var(--red)}.badge.yellow{color:var(--yellow)}.question{max-width:760px;margin:0 auto}.question-term{font-size:clamp(1.4rem,4vw,2.2rem);font-weight:800;margin:12px 0 24px}.answers{display:grid;gap:12px}.answer{width:100%;text-align:left;justify-content:flex-start;background:var(--panel2);border:1px solid var(--border);min-height:58px}.answer.correct{background:rgba(54,211,153,.18);border-color:var(--green)}.answer.wrong{background:rgba(255,100,124,.18);border-color:var(--red)}.answer.disabled{opacity:.45;text-decoration:line-through}.result-good{border:2px solid var(--green);background:rgba(54,211,153,.08)}.result-bad{border:2px solid var(--red);background:rgba(255,100,124,.08)}.progress{height:10px;background:var(--panel2);border-radius:999px;overflow:hidden;margin:12px 0 24px}.progress span{display:block;height:100%;background:var(--accent)}.center{text-align:center}.big-score{font-size:3rem;font-weight:900}.nav-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px}.nav-card{display:block;background:var(--panel);border:1px solid var(--border);padding:18px;border-radius:14px;text-decoration:none;color:var(--text)}.invite-code{font:900 1.8rem ui-monospace,SFMono-Regular,monospace;letter-spacing:3px;padding:14px;background:#0b0f14;border:1px dashed var(--accent);border-radius:10px;text-align:center}.small{font-size:.9rem}@media(max-width:650px){.topbar{padding:0 14px}.topbar nav span{display:none}.container{padding:18px 12px 40px}.card{padding:16px}.actions>*{width:100%}.table th,.table td{padding:9px 7px}.button,button,input[type=submit]{width:100%}}
.max-500{max-width:500px;margin:30px auto}.max-600{max-width:600px;margin:0 auto}.max-650{max-width:650px;margin:0 auto}.mt-18{margin-top:18px}.mt-10{margin-top:10px}.separator{border:0;border-top:1px solid var(--border);margin:24px 0}.inline-form{display:inline}.space-row{justify-content:space-between;border-bottom:1px solid var(--border);padding:10px 0}