.practice-app{background:#fff;border:1px solid #dae3df;border-radius:18px;padding:clamp(1rem,3vw,2rem);margin:1.5rem 0;box-shadow:0 12px 35px rgba(23,51,59,.08)}.practice-app h2{margin:.2rem 0 .7rem}.practice-app p{max-width:70ch}.practice-levels{display:grid;grid-template-columns:repeat(7,1fr);gap:.5rem;margin:1.4rem 0}.practice-levels button{padding:1rem .3rem;border:2px solid #c8d8d3;border-radius:12px;background:#f7fbfa;color:#182d3b;font-weight:800}.practice-levels button:hover,.practice-levels button:focus-visible{border-color:#127d79;background:#eaf6f3}.practice-progress{font-size:.9rem;font-weight:750;color:#526672;margin-bottom:1rem}.practice-progress-bar{height:9px;border-radius:99px;background:#e3eeee;overflow:hidden;margin:.4rem 0 1rem}.practice-progress-bar span{display:block;height:100%;background:#127d79;transition:width .25s}.practice-question{font-size:1.3rem;font-weight:760;line-height:1.35;margin:1rem 0}.practice-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.7rem;border:0;padding:0;margin:1.4rem 0}.practice-option{min-height:74px;text-align:left;padding:.85rem 1rem;border:2px solid #c8d8d3;background:#fff;border-radius:12px;color:#182d3b;line-height:1.3}.practice-option:hover{border-color:#127d79;background:#f3faf8}.practice-option[aria-checked="true"]{border-color:#127d79;background:#e3f3f0}.practice-option:disabled{cursor:default}.practice-feedback{padding:1rem 1.2rem;border-radius:12px;background:#f3faf8;border-left:4px solid #127d79;margin:1rem 0}.practice-feedback.incorrect{background:#fff6ef;border-left-color:#e77c67}.practice-actions{display:flex;gap:.7rem;flex-wrap:wrap;margin-top:1.3rem}.practice-app .practice-button{background:#127d79;color:#fff;border:0;border-radius:10px;font-weight:750;padding:.75rem 1.1rem}.practice-app .practice-button.secondary{background:#fff;color:#182d3b;border:1px solid #baccc8}.practice-result{font-size:2.7rem;line-height:1.1;font-weight:850;color:#127d79;margin:.5rem 0}.practice-review{border-top:1px solid #dae3df;padding:1rem 0}.practice-review p{margin:.4rem 0}.practice-kicker{text-transform:uppercase;letter-spacing:.1em;font-size:.78rem;color:#0d625f;font-weight:850}@media(max-width:650px){.practice-levels{grid-template-columns:repeat(4,1fr)}.practice-options{grid-template-columns:1fr}.practice-option{min-height:64px}}@media print{.practice-actions,.practice-levels{display:none}.practice-app{border:0;box-shadow:none}}
.practice-visual{margin:1rem 0}.practice-diagram{width:100%;height:auto;border:1px solid #d8e7e2;border-radius:14px;background:#f8fbfa}.practice-option.with-visual{display:grid;grid-template-columns:2rem 88px 1fr;align-items:center;gap:.65rem}.practice-choice-image{width:88px;height:66px;object-fit:contain}.practice-feedback .practice-diagram,.practice-review .practice-diagram{max-width:640px;margin-top:1rem}@media(max-width:650px){.practice-option.with-visual{grid-template-columns:1.5rem 80px 1fr;padding:.5rem}.practice-choice-image{width:80px;height:60px}}

.practice-levels{grid-template-columns:repeat(auto-fit,minmax(140px,1fr))}.practice-levels button{padding:.9rem .6rem;font-size:.92rem}.practice-app .practice-question{color:#17324d}.practice-next-lessons{padding:1rem;background:#edf6f5;border-radius:12px;margin:1.4rem 0}.practice-next-lessons a{display:block;margin:.5rem 0;color:#0d625f;font-weight:650}