.linear-learning .layout{display:block;max-width:860px}
.linear-learning .lesson-nav{position:static;margin-bottom:12px}
#lesson-directory>summary{color:var(--cyan-dark);min-height:44px}
#lesson-directory[open]{padding:0 16px 16px;background:var(--card);border:1px solid var(--line);border-radius:12px}
.linear-learning #task-list{display:block;overflow:visible}
.linear-learning .task-button{width:100%;min-width:0;min-height:44px;margin:4px 0}
.linear-learning .nav-title{margin:12px 0;flex-wrap:wrap}
.directory-section{padding:14px 0;border-top:1px solid var(--line)}
.directory-stage{margin:0 0 4px;color:var(--cyan-dark);font-size:.78rem;font-weight:750;letter-spacing:.06em}
.directory-section h2{margin:0 0 10px;color:var(--navy);font-size:1rem}
.directory-section label{margin-top:0}
.application-paths>p.muted{margin:0 0 10px;font-size:.86rem}
#application-path-list{display:grid;gap:8px;margin:0;padding:0;list-style:none}
#application-path-list li{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:10px}
.application-path-button{min-height:44px;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:white;color:var(--navy);font:inherit;font-size:.9rem;font-weight:700;text-align:left}
.application-path-button[aria-current="true"]{border-color:var(--teal);background:var(--mint);color:var(--cyan-dark)}
#application-path-list span{font-size:.78rem;white-space:nowrap}
.current-path{padding-top:12px;border-top:1px solid var(--line)}
.current-path h3{margin:0 0 8px;color:var(--navy);font-size:.92rem}
.linear-learning .practice{padding:28px 32px}
.round-indicator{margin:0 0 8px;color:var(--cyan-dark);font-size:.9rem;font-weight:750}
.resume-hint{margin:0 0 12px;font-size:.86rem}
.unscored-next{margin:18px 0 0;padding:16px;border:1px solid var(--line);border-radius:12px;background:var(--paper)}
.unscored-next strong{display:block;color:var(--navy)}
.unscored-next p{margin:8px 0 14px;font-size:.88rem;line-height:1.6}
.unscored-next .primary{width:100%;min-height:50px}
.linear-learning .transfer-value{display:flex;flex-wrap:wrap;align-items:center;column-gap:14px;padding:10px 14px;margin-bottom:16px}
.linear-learning #transfer-value-title{font-size:.9rem}
.linear-learning #transfer-value-topics{order:2;width:100%;font-size:.85rem;margin:0;color:var(--muted)}
.linear-learning #transfer-progress{display:none}
.linear-learning #open-transfer-map{margin-left:auto;min-height:44px;text-decoration:none}
.linear-learning .practice-step{padding:8px 12px;margin-bottom:12px}
.linear-learning #step-exposure{margin-top:6px}
.question-card{margin:16px 0 10px;padding:16px 18px;background:var(--paper);border-left:4px solid var(--teal);border-radius:10px}
.question-card-heading{display:flex;align-items:center;justify-content:space-between;gap:14px}
.question-card h2{margin:0;font-size:1rem;color:var(--navy)}
.question-card #context{margin:12px 0 0;white-space:pre-line}
.question-audio-button{flex:0 0 auto;min-height:44px;padding:8px 14px;border:1px solid var(--cyan-dark);border-radius:999px;background:white;color:var(--cyan-dark);font:inherit;font-size:.9rem;font-weight:650}
.question-audio-button[aria-pressed="true"]{background:var(--cyan-dark);color:white}
.question-audio-status{margin:10px 0 0;font-size:.86rem}
.answer-plan-toggle{display:block;width:100%;min-height:48px;margin:12px 0 8px;border-color:var(--teal);color:var(--cyan-dark);background:white;font-weight:700}
.answer-plan{margin:0 0 16px;padding:16px 18px;background:#f5f9fa;border:1px solid var(--line);border-radius:12px}
.answer-plan h2{margin:0 0 14px;font-size:1.05rem;color:var(--navy)}
.answer-plan-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:14px}
.answer-plan-grid p{margin:6px 0 0}.answer-plan-grid ul{margin:6px 0 0;padding-left:20px}
.alternative-reasons{margin:0 0 14px;padding:12px 14px;border-left:3px solid var(--teal);background:white;border-radius:8px}
.alternative-reasons p{margin:6px 0 0;line-height:1.6}.alternative-reasons .muted{font-size:.88rem}
.answer-plan-timing{margin:8px 0 0;padding-left:24px}.answer-plan-timing li{margin:7px 0;line-height:1.65}
.answer-plan-note{margin:12px 0 0}
.linear-learning .prompt-block{padding:12px 0 4px}
.linear-learning #prompt-guidance{margin:7px 0 12px;line-height:1.65}
.linear-learning #prompt{margin:8px 0 14px}
.prompt-parts{display:grid;gap:12px}
.prompt-part{padding:14px 16px;border:1px solid var(--line);border-radius:12px;background:white}
.prompt-part strong{display:block;margin-bottom:7px;color:var(--cyan-dark);font-size:.92rem}
.prompt-part p{margin:0;color:var(--navy);font-size:1.08rem;line-height:1.75;font-weight:650}
.prompt-part.supporting_detail{background:var(--paper)}
.linear-learning .hint-actions{align-items:flex-start;gap:18px}
#more-hints>summary{min-height:44px;color:var(--cyan-dark)}
.hint-options{display:flex;flex-wrap:wrap;gap:12px}
.linear-learning #feedback{margin-top:16px;padding-top:20px}
.linear-learning .english{font-family:inherit;font-size:1.08rem;line-height:1.8}
.linear-learning .feedback-heading{justify-content:space-between;flex-wrap:wrap}
.feedback-actions{display:flex;flex-direction:column;gap:6px;margin-top:24px;border-top:1px solid var(--line);padding-top:20px}
.feedback-actions .next-preview{order:0}
.feedback-actions .primary{order:1;width:100%;min-height:50px}
.feedback-actions .text-button{order:2;align-self:center;min-height:44px}
.next-preview strong{font-size:1rem;color:var(--navy)}
.next-preview p{margin:6px 0 14px}
.processing-status{background:var(--paper);padding:16px;border-radius:10px;color:var(--cyan-dark)}
#recorded{border-top:1px solid var(--line);margin:20px 0 0;padding-top:8px}
#recorded summary{min-height:44px}
.linear-learning #recovery-actions:empty{display:none}
.linear-learning .history,.linear-learning #transcript-panel{margin-top:16px;padding-top:10px}
.completion-actions{display:flex;flex-direction:column;gap:10px;margin-top:24px}
.completion-actions .primary{min-height:50px}
.completion-actions .text-button{align-self:center}
#course-end-records{padding-left:22px;line-height:1.9}
#course-end:focus{outline:2px solid var(--teal);outline-offset:6px}
@media(max-width:700px){.linear-learning .layout{padding:0 12px}.linear-learning .practice{padding:20px 18px}.linear-learning .lesson-nav{margin-bottom:8px}.linear-learning .notice{margin:10px 18px 0}.linear-learning .transfer-value{column-gap:8px;padding:8px 10px}.linear-learning .record-controls .primary{flex:1}.linear-learning .record-area{margin-top:8px}.linear-learning .task-meta{font-size:.8rem}.linear-learning h1{margin:10px 0 14px;font-size:1.25rem}.question-card{padding:14px}.question-card-heading{align-items:flex-start}.question-audio-button{padding:8px 12px;font-size:.86rem}.answer-plan-grid{grid-template-columns:1fr;gap:12px}.answer-plan{padding:14px}.prompt-part{padding:13px 14px}#application-path-list li{grid-template-columns:1fr}#application-path-list span{padding-left:12px}}

.expression-section { margin-top: 1.5rem; padding-top: 1rem; border-top: 1px solid #dce9ed; }
.expression-item { margin: 1rem 0; padding: 1rem; background: #f5f9fa; border-radius: 14px; overflow-wrap: anywhere; }
.expression-item h4 { margin: 0 0 .85rem; }
.expression-item p { margin: .35rem 0 .85rem; }
.expression-item .expression-label { margin-bottom: .15rem; color: #63798b; font-size: .88rem; font-weight: 600; }
.expression-replacement { color: #087e91; font-weight: 600; }
.chapter-view{margin:0 auto;max-width:860px}.chapter-hero{padding:4px 0 12px;border-bottom:1px solid var(--line)}.chapter-hero h1{margin-bottom:8px}.chapter-subtitle{font-size:1.05rem;color:var(--cyan-dark);font-weight:700}.chapter-section{padding:24px 0;border-bottom:1px solid var(--line)}.chapter-section h2{font-size:1.2rem}.chapter-mechanism{padding:12px 14px;background:var(--mint);border-radius:10px;color:var(--navy);font-weight:700}.chapter-boundary{padding:12px 14px;border-left:3px solid var(--teal);background:var(--paper)}.chapter-grid,.chapter-patterns{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.chapter-patterns{margin-top:14px}.chapter-position,.chapter-demo,.chapter-practice-preview{margin:12px 0;padding:14px;border:1px solid var(--line);border-radius:12px;background:white}.chapter-position strong{color:var(--cyan-dark)}.chapter-position p,.chapter-demo p,.chapter-practice-preview p{margin:8px 0}.chapter-question-card{margin:10px 0;padding:12px 14px;background:var(--paper);border-left:3px solid var(--teal);border-radius:8px}.chapter-question-card .muted{margin:6px 0;font-size:.84rem}.chapter-question-card .english{margin:6px 0}.chapter-prompt-part{padding:10px 12px;background:var(--paper);border-radius:8px;font-weight:650}.chapter-checks{padding-left:22px;line-height:1.8}.chapter-section .primary{width:100%;min-height:50px;margin-top:12px}@media(max-width:700px){.chapter-grid,.chapter-patterns{grid-template-columns:1fr}.chapter-view{max-width:none}}