/* R6 inherits the approved calm palette and type scale. */
.r6-toolbar{display:flex;justify-content:space-between;align-items:center;gap:1rem;flex-wrap:wrap;margin:1.5rem 0}.r6-toolbar>span{font-size:.92rem;line-height:1.5}
.r6-filters{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1.1rem;margin-bottom:1.2rem}.r6-filters select,.r6-filters input{width:100%;min-width:0;font-size:1rem}.r6-filters label{min-width:0}
.r6-part-note{margin:1rem 0}.r6-chapter{margin:2rem 0 2.5rem}.r6-chapter>h2{font-size:1.2rem;line-height:1.5;margin-bottom:1rem}.r6-path-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem}.r6-path{min-width:0;display:flex;align-items:flex-start;flex-direction:column;gap:.65rem}.r6-path h3{font-size:1.1rem;line-height:1.45;margin:0}.r6-path p{margin:0;line-height:1.6}.r6-path details{margin-bottom:.5rem;overflow-wrap:anywhere}.r6-path details p{margin-top:.75rem}.r6-path button{margin-top:auto}.r6-path .tag{white-space:normal;line-height:1.5}
.r6-reasoning{margin:1rem 0;padding:1rem 0;border-top:1px solid var(--line,#d7dfdc)}.r6-reasoning textarea{width:100%;resize:vertical;font:inherit;line-height:1.5;padding:.8rem;border:1px solid var(--line,#d7dfdc);border-radius:10px;margin:.6rem 0}.r6-reasoning details[open] summary{margin-bottom:.8rem}.r6-reasoning small{display:block;line-height:1.5}
.r6-specific,.r6-hinge{margin-top:1rem}.r6-distractors,.r6-sources{margin-top:1rem}.r6-alternative{padding:.6rem 0;border-bottom:1px solid var(--line,#d7dfdc)}.r6-alternative:last-child{border-bottom:none}.r6-alternative p{line-height:1.6}.r6-sources a{overflow-wrap:anywhere}.r6-scope{margin:2rem 0;line-height:1.7}.r6-version{font-size:.85rem;line-height:1.7;margin-top:2rem}.r6-draft-notice{font-size:.9rem;line-height:1.6;border-left:3px solid currentColor;padding:.7rem 1rem}
.quiz-navigation{display:grid!important;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:.8rem;margin:1rem 0!important}.quiz-navigation button{width:100%;min-height:48px;white-space:normal}.quiz-navigation button:disabled{opacity:.45;cursor:not-allowed}
@media(max-width:700px){.r6-filters,.r6-path-grid{grid-template-columns:minmax(0,1fr)}.r6-path{padding:1.25rem}.r6-chapter{margin-top:1.6rem}.r6-toolbar{align-items:flex-start}.r6-toolbar>span{max-width:100%}.quiz-navigation{gap:.65rem}.quiz-navigation button{font-size:1rem;padding:.8rem .6rem}.r6-filters{padding:1.2rem}}
/* A revealed answer is disabled for editing, not faded for reading. */
.question .option:disabled{opacity:1;cursor:default}
.recall-mode .question .option.correct,.recall-mode .question .option.selected.correct{background:#e4f3e8;color:#254837;border-color:#8fc49d}
.recall-mode .question .option.wrong,.recall-mode .question .option.selected.wrong{background:#fce9e7;color:#71332f;border-color:#dda29b}
.r6-answer-label{display:block;font-size:.8rem;line-height:1.4;margin-bottom:.4rem}