:root{--bg:#f5f6f8;--card:#fff;--text:#1b1f24;--muted:#6b7280;--accent:#1f4e8c;--accent-text:#fff;--danger:#b42318;--border:#e3e6ea;--radius:14px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;-webkit-text-size-adjust:100%;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;font-size:17px;line-height:1.45}*{box-sizing:border-box}html,body,#root{min-height:100%;margin:0}body{background:var(--bg);color:var(--text);padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left)}h1,h2{margin:0 0 .5rem;line-height:1.2}h1{font-size:1.5rem}h2{font-size:1.2rem}p{margin:0 0 .75rem}.screen{flex-direction:column;gap:16px;max-width:520px;min-height:100dvh;margin:0 auto;padding:16px;display:flex}.screen-center{justify-content:center}.brand{letter-spacing:.02em;color:var(--accent);font-weight:800}h1.brand{font-size:2rem}.muted{color:var(--muted)}.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px}.form{flex-direction:column;gap:12px;display:flex}label{flex-direction:column;gap:6px;font-weight:600;display:flex}input{font:inherit;border:1px solid var(--border);color:var(--text);background:#fff;border-radius:10px;padding:12px 14px}input:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:var(--accent)}.button{font:inherit;border:1px solid var(--border);background:var(--card);color:var(--text);cursor:pointer;border-radius:10px;min-height:48px;padding:12px 16px;font-weight:600}.button.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-text)}.button.danger{background:var(--danger);border-color:var(--danger);color:#fff}.button:disabled{opacity:.6;cursor:default}.link{font:inherit;color:var(--accent);cursor:pointer;text-align:left;background:0 0;border:none;padding:8px 0}.notice{color:var(--accent)}.error{color:var(--danger)}.topbar{justify-content:space-between;align-items:center;gap:12px;display:flex}.tiles{grid-template-columns:1fr;gap:12px;display:grid}@media (width>=600px){.tiles{grid-template-columns:1fr 1fr}}.tile{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);opacity:.8;padding:16px 16px 18px;position:relative}.tile-title{margin-bottom:4px;padding-right:64px;font-size:1.05rem;font-weight:700}.tile-hint{color:var(--muted);font-size:.95rem}.badge{background:var(--bg);color:var(--muted);border:1px solid var(--border);border-radius:999px;padding:2px 8px;font-size:.8rem;position:absolute;top:14px;right:14px}.actions{flex-direction:column;gap:8px;margin-top:auto;display:flex}.steps{margin:0 0 1rem;padding-left:1.25rem}.steps li{margin-bottom:.5rem}.kbd{border:1px solid var(--border);background:var(--bg);border-radius:6px;padding:0 6px;display:inline-block}.tile-ready{opacity:1;text-align:left;font:inherit;color:var(--text);cursor:pointer;border-color:var(--accent)}.tile-ready:active{background:var(--bg)}select{font:inherit;border:1px solid var(--border);color:var(--text);background:#fff;border-radius:10px;max-width:100%;padding:12px 14px}.task-html{overflow-wrap:anywhere;word-break:break-word;max-width:100%;max-height:none;overflow:visible}.task-html img{vertical-align:middle;max-width:100%;height:auto}.task-html table{-webkit-overflow-scrolling:touch;border-collapse:collapse;max-width:100%;max-height:none;display:block;overflow:auto hidden}.task-html math{vertical-align:middle;max-width:100%;display:inline-block;overflow:auto hidden}.task-html td,.task-html th{border:1px solid var(--border);vertical-align:top;padding:4px 8px}.task-html p{margin:0 0 .6rem}.task-html math{font-size:1.1em}.card,.screen{overflow:visible}.solution{border-top:1px solid var(--border);padding-top:8px}.answer-input{letter-spacing:.12em;font-size:1.5rem}.outcome{margin:0;font-size:1.2rem;font-weight:700}.outcome-correct{color:#1a7f37}.outcome-partial{color:#b35900}.outcome-wrong,.outcome-skip{color:var(--danger)}.screen-wide{max-width:1100px}.table-wrap{max-width:100%;overflow-x:auto}table.attempts{border-collapse:collapse;width:100%;font-size:.9rem}table.attempts th,table.attempts td{border:1px solid var(--border);text-align:left;white-space:nowrap;padding:6px 8px}table.attempts th{background:var(--bg)}table.data{border-collapse:collapse;width:100%;font-size:.9rem}table.data th,table.data td{border:1px solid var(--border);text-align:left;white-space:nowrap;padding:6px 8px}table.data th{background:var(--bg)}.tokens{flex-direction:column;gap:8px;display:flex}.tokens-row{flex-direction:column;gap:2px;display:flex}@media (width>=600px){.tokens-row{flex-direction:row;justify-content:space-between;gap:12px}}.row{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.row label{flex:120px}fieldset{border:1px solid var(--border);border-radius:10px;margin:0;padding:12px}legend{padding:0 4px;font-weight:600}label.checkbox{flex-direction:row;align-items:center;gap:10px}label.checkbox input{width:22px;height:22px}