.practice-setup {display:flex;align-items:center;justify-content:center;gap:clamp(20px,5vw,68px);padding:clamp(18px,4vw,42px)}
.practice-config {flex:1;max-width:28rem;min-width:0;display:grid;gap:1.05rem}
.practice-config h2,.practice-config .practice-count {text-align:center;margin:0}
.practice-count {color:#385877}
.practice-cover-note {max-width:40rem;margin:0 auto;font-size:.95rem;line-height:1.45;color:#364b60}
.practice-art {max-width:42%;flex:0 1 18rem;text-align:center}
.practice-enlarge {background:transparent;color:#224e74;border:0;padding:0;cursor:zoom-in;font:inherit}
.practice-enlarge span {display:block;text-decoration:underline;margin-top:.35rem}
.practice-cover {display:block;max-width:100%;max-height:23rem;width:auto;height:auto;object-fit:contain;border-radius:.55rem;margin:auto}
.practice-cover.small-original {max-height:148px;max-width:148px}
.practice-preferences {display:grid;gap:.9rem;min-width:0;width:100%;text-align:start}
.practice-timer-toggle {display:inline-flex;align-items:center;justify-self:start;gap:.55rem;min-height:44px;cursor:pointer;font-weight:700}
.practice-timer-toggle input,.practice-choice input {accent-color:#22557f;flex:none;margin:0}
.practice-timer-toggle input {width:1.2rem;height:1.2rem}
.practice-choice-group {min-inline-size:0;margin:0;padding:0;border:0}
.practice-choice-group legend {padding:0;margin:0 0 .35rem;text-align:start;font:inherit;font-weight:700}
.practice-choices {display:flex;gap:.35rem;flex-wrap:wrap}
.practice-choice {box-sizing:border-box;display:inline-flex;align-items:center;gap:.35rem;min-height:44px;margin:0;padding:.36rem .65rem;border-radius:.7rem;border:1px solid #b2c2d1;background:#fff;color:#294357;cursor:pointer;line-height:1.25}
.practice-choice input {width:1rem;height:1rem}
.practice-choice:has(input:checked) {background:#e9f3fb;color:#153f61;border-color:#48779e}
.practice-choice:has(input:focus-visible),.practice-timer-toggle:has(input:focus-visible) {outline:3px solid #245f90;outline-offset:2px}
.practice-feedback-hint {margin:0;font-size:.9rem;line-height:1.35;color:#3f5465}
.practice-feedback-hint[hidden] {display:none}
.practice-cover-dialog {border:0;border-radius:.8rem;max-width:94vw;max-height:94dvh;padding:.75rem;text-align:center}
.practice-cover-dialog::backdrop {background:#122432bd}
.practice-cover-dialog img {display:block;max-width:100%;max-height:78dvh;width:auto;object-fit:contain;margin:.5rem auto 0}
.practice-sources {margin-top:1.25rem;border-top:1px solid #dce4eb;padding-top:.75rem}
.practice-sources li {margin:.5rem 0;overflow-wrap:anywhere}
.practice-time {color:#284b69;font-variant-numeric:tabular-nums}
.section-top.practice-question-meta {display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:baseline;gap:.35rem}
.practice-question-meta .practice-time {margin:0;text-align:end;white-space:nowrap}
.exercise .option > b {white-space:nowrap;flex:none}
.exercise .option > span {min-width:0}
.practice-stats {display:flex;flex-wrap:wrap;justify-content:center;gap:.6rem 1.4rem;margin:1rem 0}
.practice-stats > div {display:grid;justify-items:center;align-content:start;gap:.16rem}
.practice-stats dt {font-size:.85rem;color:#415970}
.practice-stats dd {margin:0;font-size:1.14rem;font-weight:700;color:#204965;font-variant-numeric:tabular-nums}
@media(max-width:650px){
  .practice-setup {flex-direction:column;align-items:stretch}
  .practice-art {width:100%;max-width:100%;flex:none}
  .practice-cover {max-height:10rem}
  .practice-config {max-width:none}
}
@media(max-width:360px){
  .section-top.practice-question-meta {gap:.2rem}
  .practice-question-meta > .fine {font-size:.78rem}
}
.exercise .practice-topic {margin:.8rem 0 .4rem;color:#284b69;text-align:start;font-weight:650;overflow-wrap:anywhere}
.practice-action-row {display:grid;grid-template-columns:repeat(3,minmax(0,1fr));align-items:stretch;gap:clamp(.2rem,1.2vw,.8rem);margin-top:1rem}
.practice-action-row .btn {min-width:0;min-height:44px;justify-self:start;white-space:normal;line-height:1.2;padding:.5rem .8rem;overflow-wrap:anywhere}
.practice-action-row .practice-restart {grid-column:2;justify-self:center}
.practice-action-row .practice-save {grid-column:3;justify-self:end}
.exercise .practice-end {display:flex;margin:1rem auto .45rem}
.response-box.practice-right {color:#194933;border-color:#b9d9c8;border-left-color:#397453;background:#eff8f1}
.response-box.practice-wrong {color:#632c32;border-color:#edc9ca;border-left-color:#a44e56;background:#fff1f1}
.practice-action-dialog .button-row {justify-content:center}
@media(max-width:520px){
  .practice-action-row {grid-template-columns:minmax(0,1fr) minmax(0,.8fr) minmax(0,1.15fr)}
  .practice-action-row .btn {width:100%;padding:.45rem .18rem;font-size:.85rem}
  .practice-action-row .symbol {display:none}
}