.diagnostic{--ink:var(--text);--blue:#91b6eb;max-width:760px;color:var(--ink);min-height:var(--vvh,100svh);box-sizing:border-box;margin:0 auto;padding:24px;font-family:Arial,sans-serif}.diagnostic header{justify-content:space-between;align-items:center;gap:20px;margin-bottom:12px;display:flex}.diagnostic a{color:var(--blue)}.diagnostic-save{color:var(--muted);min-height:24px;font-size:13px}.diagnostic section{height:calc(var(--vvh,100svh) - 130px);flex-direction:column;min-height:0;display:flex}.diagnostic-middle{flex:1;min-height:0;padding:22px 0 12px;overflow:auto}.diagnostic h1{margin:0 0 18px;font-size:28px;font-weight:500}.diagnostic p{line-height:1.7}.diagnostic-word{letter-spacing:.03em;font-size:42px}.diagnostic-workbench{left:50%;top:calc(var(--vvtop,0px) + var(--vvh,100svh) - 16px);z-index:5;background:var(--base);grid-template-rows:24px 70px 42px 46px;gap:6px;width:min(712px,100% - 48px);height:240px;padding:8px 0 14px;display:grid;position:fixed;transform:translate(-50%,-100%)}.diagnostic-workbench input{box-sizing:border-box;width:100%;color:var(--ink);background:0 0;border:0;border-bottom:2px solid #65768c;border-radius:0;padding:14px 8px;font-size:30px}.diagnostic-workbench input:focus{outline-offset:4px;outline:2px solid #245cb5}.diagnostic button{color:#fff;cursor:pointer;background:#245cb5;border:1px solid #7197b5;border-radius:8px;justify-self:end;padding:12px 28px;font-size:17px}.diagnostic button:disabled{opacity:.45;cursor:default}.diagnostic #diagnostic-warning{color:#f4c395;min-height:24px;margin:0;font-size:14px}.diagnostic button.diagnostic-quiet{color:#245cb5;background:0 0}.diagnostic-diff{letter-spacing:.025em;font-size:28px}.diagnostic-diff mark{color:#663a00;background:#fde7bb;border-bottom:2px solid #a7670b}.diagnostic-correction{border-inline-start:2px solid #a7670b;padding-inline-start:16px}@media (max-width:600px){.diagnostic{padding:16px}.diagnostic h1{font-size:24px}.diagnostic-middle{padding:10px 0 12px}.diagnostic-workbench{width:calc(100% - 32px)}}.diagnostic-diff .glyph-amber{animation-fill-mode:none;display:inline-block}@media (prefers-reduced-motion:reduce){.diagnostic-diff .glyph-amber{animation:none}}.learning-nav:has(~.diagnostic){display:none}.course-diagnostic-summary{max-width:760px;color:var(--text);margin:24px auto;padding:16px 24px}.course-diagnostic-summary p{line-height:1.7}