:root{--blue:#0b3d91;--blue-light:#e8eef9;--green:#127a3a;--green-bg:#e3f5e9;--red:#b42318;--red-bg:#fdecea;--text:#111;--muted:#5a6270;--border:#d0d5dd;color:var(--text);-webkit-text-size-adjust:100%;-webkit-tap-highlight-color:transparent;background:#fff;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;font-size:18px;line-height:1.45}*{box-sizing:border-box}body{margin:0}button{font:inherit;color:inherit;cursor:pointer}.screen{max-width:640px;padding:calc(env(safe-area-inset-top) + 16px) 16px calc(env(safe-area-inset-bottom) + 24px);flex-direction:column;min-height:100dvh;margin:0 auto;display:flex}h1{margin:0 0 4px;font-size:2rem}.muted{color:var(--muted);margin:0}.btn{border:0;border-radius:14px;width:100%;margin-top:12px;padding:16px;font-weight:600}.btn.big{padding:20px 16px;font-size:1.2rem}.btn.primary{background:var(--blue);color:#fff}.btn.primary:active{opacity:.85}.btn.secondary{background:var(--blue-light);color:var(--blue)}.link{color:var(--blue);background:0 0;border:0;padding:8px 0}.link.center{align-self:center;margin-top:16px}.home{justify-content:center}.sizes{border:0;grid-template-columns:repeat(4,1fr);gap:8px;margin:32px 0 8px;padding:0;display:grid}.sizes legend{color:var(--muted);margin-bottom:8px;padding:0}.size{border:2px solid var(--border);background:#fff;border-radius:12px;padding:12px 0;font-weight:600}.size.active{border-color:var(--blue);background:var(--blue-light);color:var(--blue)}.last{text-align:center;margin-top:24px;font-size:.9rem}.exam{padding-bottom:calc(env(safe-area-inset-bottom) + 110px)}.exam-header{justify-content:space-between;align-items:center;display:flex}.counter{color:var(--blue);font-weight:700}.progress{background:var(--blue-light);border-radius:3px;height:6px;margin:4px 0 16px;overflow:hidden}.progress div{background:var(--blue);height:100%;transition:width .2s}.context{background:#f4f5f7;border-radius:10px;margin:0 0 12px;padding:12px;font-size:.95rem}.question{overflow-wrap:anywhere;margin:0 0 16px;font-size:1.2rem;line-height:1.4}.options{flex-direction:column;gap:10px;margin:0;padding:0;list-style:none;display:flex}.option{text-align:left;border:2px solid var(--border);overflow-wrap:anywhere;background:#fff;border-radius:14px;align-items:flex-start;gap:12px;width:100%;min-height:56px;padding:14px;display:flex}.option:disabled{cursor:default;color:var(--text)}.option:not(:disabled):active{background:var(--blue-light)}.letter{background:#f0f2f5;border-radius:50%;flex:none;place-items:center;width:28px;height:28px;font-size:.9rem;font-weight:700;display:grid}.option.correct{border-color:var(--green);background:var(--green-bg)}.option.correct .letter{background:var(--green);color:#fff}.option.wrong{border-color:var(--red);background:var(--red-bg)}.option.wrong .letter{background:var(--red);color:#fff}.option.dim{opacity:.55}.feedback{border-radius:14px;margin-top:16px;padding:14px}.feedback.ok{background:var(--green-bg);color:var(--green)}.feedback.ko{background:var(--red-bg);color:var(--red)}.feedback p{color:var(--text);margin:8px 0 0}.feedback .note{color:var(--muted);font-size:.85rem}.source{color:var(--muted);margin:16px 0 0;font-size:.75rem}.bottom-bar{padding:8px 16px calc(env(safe-area-inset-bottom) + 12px);border-top:1px solid var(--border);background:#fffffff2;position:fixed;bottom:0;left:0;right:0}.bottom-bar .btn{max-width:608px;margin:0 auto;display:block}.result{text-align:center;justify-content:center}.percent{color:var(--blue);margin:8px 0;font-size:4rem;font-weight:800}.stats{grid-template-columns:1fr 1fr;gap:12px;margin-bottom:20px;display:grid}.stat{border-radius:14px;padding:16px}.stat span{font-size:2rem;font-weight:800;display:block}.stat.ok{background:var(--green-bg);color:var(--green)}.stat.ko{background:var(--red-bg);color:var(--red)}