.lesson-page { background: #fbfbf8; }
.lesson-topbar { min-height: 67px; border-bottom: 1px solid #e8e8e4; background: rgba(255,255,255,.86); display: flex; align-items: center; padding: 0 4.2vw; gap: 30px; }
.lesson-brand { display: flex; align-items: center; gap: 8px; color: #302839; text-decoration: none; min-width: 136px; }.lesson-brand .brand-mark { transform: scale(.75); transform-origin: left center; width: 26px; }.lesson-brand-name { font-size: 16px; font-weight: 800; letter-spacing: -.6px; margin-left: -6px; }
.lesson-breadcrumb { display: flex; align-items: center; gap: 9px; color: #a0a0a0; font-size: 10px; flex: 1; }.lesson-breadcrumb a { color: #85868a; text-decoration: none; }.lesson-breadcrumb a:hover { color: #4f9485; }.lesson-breadcrumb span { color: #d2d2cf; }.lesson-breadcrumb strong { color: #515159; font-weight: 700; }
.lesson-top-actions { display: flex; align-items: center; gap: 17px; font-size: 10px; }.saved-state { color: #6e9b8f; }.saved-state span { display: inline-grid; place-items: center; width: 16px; height: 16px; border-radius: 50%; background: #e3f4ed; margin-right: 4px; }.lesson-top-actions .icon-button { width: 21px; height: 21px; border: 1px solid #d5d6d3; border-radius: 50%; font-size: 11px; }.exit-lesson { color: #85868a; text-decoration: none; border-left: 1px solid #e7e7e4; padding-left: 16px; }.exit-lesson:hover { color: #4c405c; }
.lesson-layout { max-width: 1340px; padding: 48px 4.2vw 72px; margin: 0 auto; display: grid; grid-template-columns: 190px minmax(0, 720px) 180px; gap: clamp(32px, 5vw, 85px); align-items: start; }.lesson-outline { position: sticky; top: 30px; }.outline-label, .card-label, .notes-card p, .teacher-note-label { color: #9a9a9b; font: 9px 'DM Mono', monospace; letter-spacing: .09em; }.outline-progress { height: 4px; background: #e6ece9; border-radius: 3px; margin-top: 14px; overflow: hidden; }.outline-progress span { display: block; height: 100%; background: #73b4a2; border-radius: inherit; }.outline-count { color: #9b9b9a; font-size: 9px; margin: 8px 0 23px; }.outline-nav { display: grid; gap: 10px; }.outline-link { color: #97979b; text-decoration: none; display: flex; align-items: center; gap: 8px; font-size: 10px; line-height: 1.3; }.outline-link:hover { color: #4e9584; }.outline-link.current { color: #4a4b51; font-weight: 800; }.outline-link.done { color: #609f8e; }.outline-number { width: 22px; height: 22px; border: 1px solid #dedfdb; border-radius: 50%; display: grid; place-items: center; font: 8px 'DM Mono', monospace; flex: 0 0 22px; }.outline-link.current .outline-number { border-color: #79b7a7; background: #edf8f3; color: #518e7d; }.outline-link.done .outline-number { color: #5ca08b; border-color: #cbe8dd; background: #eef8f3; }
.access-card { margin-top: 52px; padding: 15px 13px; border: 1px solid #e2ebe6; border-radius: 9px; background: #f6fbf8; }.access-card-title { color: #4f8b7b; font-size: 10px; font-weight: 800; display: flex; gap: 6px; align-items: center; }.access-spark { color: #cf8060; }.access-card p { color: #8ca29b; font-size: 9px; line-height: 1.45; margin: 7px 0 13px; }.access-controls { display: grid; gap: 6px; }.access-toggle { width: 100%; border: 0; padding: 7px 0; display: flex; gap: 6px; align-items: center; color: #727f7b; background: transparent; font-size: 9px; text-align: left; }.access-toggle:hover { color: #4e8f7e; }.toggle-icon { font-size: 13px; color: #63a392; }.access-toggle i { width: 22px; height: 12px; margin-left: auto; background: #dce6e1; border-radius: 8px; position: relative; transition: background .2s; }.access-toggle i::after { content: ''; width: 8px; height: 8px; position: absolute; left: 2px; top: 2px; border-radius: 50%; background: #fff; box-shadow: 0 1px 2px rgba(0,0,0,.15); transition: transform .2s; }.access-toggle[aria-pressed="true"] i { background: #73ad9d; }.access-toggle[aria-pressed="true"] i::after { transform: translateX(10px); }.font-controls { display: flex; align-items: center; justify-content: space-between; border-top: 1px solid #e0ebe5; padding-top: 11px; margin-top: 6px; color: #87918e; font-size: 9px; }.font-controls div { display: flex; gap: 2px; }.font-controls button { border: 0; background: transparent; color: #5b9183; font-size: 10px; padding: 3px; }
.lesson-reader { min-width: 0; }.lesson-kicker { display: flex; align-items: center; gap: 17px; color: #729e91; font: 9px 'DM Mono', monospace; letter-spacing: .08em; }.lesson-time { color: #a6a6a5; letter-spacing: 0; }.lesson-reader h1 { color: #302839; font-size: clamp(30px, 4vw, 42px); letter-spacing: -1.7px; line-height: 1.04; margin: 15px 0 9px; }.lesson-lead { color: #7f8187; font-size: 15px; margin: 0 0 27px; }.objective-card { display: flex; gap: 13px; align-items: flex-start; border: 1px solid #e3ece8; border-radius: 9px; background: #f4faf7; padding: 16px 17px; margin-bottom: 39px; }.objective-icon { color: #5ea18f; width: 28px; height: 28px; flex: 0 0 28px; display: grid; place-items: center; background: #e1f2eb; border-radius: 50%; font-size: 16px; }.objective-card p { margin: 7px 0 0; color: #647c74; line-height: 1.55; font-size: 11px; }.objective-card strong { color: #3e7466; }
.content-block { transition: opacity .2s, filter .2s; }.reader-section { display: grid; grid-template-columns: 42px minmax(0,1fr); gap: 13px; margin: 0 0 31px; }.section-marker { color: #71a797; font: 10px 'DM Mono', monospace; padding-top: 4px; display: flex; align-items: center; gap: 7px; }.section-marker span { display: block; height: 1px; background: #c8e4da; width: 15px; }.section-copy h2, .visual-card h2, .practice-card h2 { color: #3c3b42; font-size: 20px; letter-spacing: -.6px; margin: 0; }.section-heading-row { display: flex; gap: 15px; justify-content: space-between; align-items: center; }.section-copy p, .long-description p, .practice-card p { color: #64666b; font-size: 13px; line-height: 1.8; margin: 15px 0 0; }.listen-button { border: 0; background: #f5faf7; border-radius: 6px; color: #5d9a8a; padding: 6px 9px; font-size: 9px; white-space: nowrap; }.listen-button:hover, .listen-button.is-playing { background: #dff1e9; }.listen-button span { font-size: 11px; vertical-align: -1px; }.numbered-list { counter-reset: item; list-style: none; padding: 0; margin: 17px 0 15px; display: grid; gap: 10px; }.numbered-list li { counter-increment: item; display: grid; grid-template-columns: 22px 1fr; gap: 8px; color: #64666b; font-size: 12px; line-height: 1.6; }.numbered-list li::before { content: counter(item); width: 20px; height: 20px; border-radius: 50%; display: grid; place-items: center; color: #5b9c8c; background: #ecf7f2; font: 9px 'DM Mono', monospace; }.numbered-list strong { color: #4c4e53; }.example-callout { border-left: 2px solid #edbc9f; padding: 5px 0 5px 13px; display: flex; gap: 9px; color: #79716d !important; line-height: 1.6 !important; }.example-callout > span:first-child { color: #cf7b5d; }.example-callout strong { color: #a1644d; }
.visual-card { background: #fff; border: 1px solid #e8eae5; border-radius: 9px; padding: 19px 21px 16px; margin: 0 0 36px 55px; }.visual-card-head { display: flex; align-items: flex-start; justify-content: space-between; }.visual-card h2 { margin-top: 6px; font-size: 16px; }.available-badge { color: #5e9d8b; background: #eef8f3; border-radius: 12px; padding: 5px 8px; font-size: 9px; }.sign-diagram { position: relative; height: 185px; max-width: 430px; margin: 8px auto 0; }.sign-node { position: absolute; width: 128px; height: 55px; border: 1px solid #bcded3; background: #f4fbf8; border-radius: 8px; text-align: center; padding: 12px 5px 5px; z-index: 2; }.sign-node span { color: #4c8174; display: block; font-size: 10px; font-weight: 800; }.sign-node small { display: block; margin-top: 4px; color: #91a7a1; font-size: 8px; }.node-top { top: 9px; left: calc(50% - 64px); }.node-left { left: 12px; bottom: 4px; }.node-right { right: 12px; bottom: 4px; }.diagram-line { position: absolute; height: 1px; background: #a8d3c7; transform-origin: left center; left: 50%; top: 64px; width: 128px; z-index: 1; }.line-one { transform: rotate(123deg); }.line-two { transform: rotate(57deg); }.line-three { left: 141px; top: 153px; width: 150px; transform: rotate(0deg); }.long-description { border-top: 1px solid #edf0ed; padding-top: 11px; }.long-description summary { color: #568d80; cursor: pointer; font-size: 10px; font-weight: 800; }.long-description p { font-size: 10px; line-height: 1.6; margin-top: 9px; }
.practice-card { background: #fffaf5; border: 1px solid #f0dfd1; border-radius: 9px; padding: 20px 22px; margin: 0 0 34px 55px; }.practice-top { display: flex; justify-content: space-between; }.practice-time { color: #bc876b; font: 9px 'DM Mono', monospace; }.practice-card h2 { font-size: 18px; margin: 8px 0 0; }.practice-card p { margin: 8px 0 15px; font-size: 11px; line-height: 1.6; }.answer-options { display: grid; gap: 7px; }.answer-option { border: 1px solid #ecd9c8; background: #fff; border-radius: 6px; padding: 10px 12px; text-align: left; color: #77716d; font-size: 10px; }.answer-option:hover, .answer-option.selected { border-color: #c88868; background: #fff5ec; color: #955b40; }.answer-feedback { color: #7e9b89 !important; margin: 11px 0 0 !important; min-height: 16px; }.lesson-footer { border-top: 1px solid #e6e6e2; padding-top: 18px; display: flex; align-items: center; justify-content: space-between; margin-left: 55px; }.back-link { border: 0; color: #8a8a8a; background: transparent; font-size: 11px; }.next-block { padding: 10px 13px; font-size: 10px; }
.lesson-notes { position: sticky; top: 30px; }.notes-title { color: #6b6c70; display: flex; align-items: center; gap: 6px; font-size: 10px; font-weight: 800; margin-bottom: 15px; }.notes-card { background: #fff; border: 1px solid #e9e9e5; border-radius: 8px; padding: 12px; display: flex; gap: 9px; }.notes-card-icon { color: #ab82be; background: #f3eaf7; width: 23px; height: 23px; display: grid; place-items: center; border-radius: 5px; font-weight: 800; font-size: 11px; }.notes-card strong { color: #5e5f64; font-size: 10px; }.notes-card p { font-family: Manrope, sans-serif; letter-spacing: 0; line-height: 1.45; margin: 4px 0 0; }.notes-link { width: 100%; border: 0; border-bottom: 1px solid #e9e9e5; padding: 13px 2px; background: transparent; color: #7b7c80; text-align: left; display: flex; align-items: center; gap: 7px; font-size: 9px; }.notes-link > span:first-child { color: #65a291; font-size: 13px; }.notes-link > span:last-child { margin-left: auto; color: #adb0ac; font-size: 13px; }.notes-link:hover { color: #4d9180; }.teacher-note { border-left: 2px solid #edbf9f; margin-top: 28px; padding-left: 11px; }.teacher-note p { color: #8e7770; font-size: 10px; line-height: 1.6; font-style: italic; margin: 8px 0 5px; }.teacher-name { color: #a7867b; font-size: 9px; }.focus-mode .lesson-notes, .focus-mode .lesson-outline { opacity: .28; }.focus-mode .lesson-reader { max-width: 720px; }.guided .content-block:not(.objective-card) { opacity: .35; }.guided .content-block.is-active { opacity: 1; }.large-text .lesson-reader { font-size: 1.12em; }.large-text .lesson-reader h1 { font-size: clamp(33px, 4.5vw, 47px); }.large-text .section-copy p, .large-text .long-description p, .large-text .practice-card p { font-size: 14px; }
@media (max-width: 1100px) { .lesson-layout { grid-template-columns: 170px minmax(0, 1fr); gap: 35px; }.lesson-notes { display: none; } }
@media (max-width: 720px) { .lesson-topbar { flex-wrap: wrap; gap: 10px; padding: 12px 18px; }.lesson-brand { min-width: 120px; }.lesson-breadcrumb { order: 3; flex-basis: 100%; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }.lesson-top-actions { margin-left: auto; }.saved-state, .exit-lesson { display: none; }.lesson-layout { display: block; padding: 25px 18px 45px; }.lesson-outline { position: static; margin-bottom: 29px; }.outline-nav { display: flex; overflow-x: auto; gap: 8px; padding-bottom: 4px; }.outline-link { background: #fff; border: 1px solid #e8e8e4; padding: 6px 8px; border-radius: 7px; white-space: nowrap; }.access-card { margin-top: 20px; }.lesson-reader h1 { font-size: 33px; }.section-heading-row { align-items: flex-start; flex-direction: column; gap: 8px; }.visual-card, .practice-card, .lesson-footer { margin-left: 0; }.visual-card { padding: 15px; }.sign-diagram { transform: scale(.8); transform-origin: center; margin-top: -2px; margin-bottom: -15px; }.lesson-footer { margin-top: 20px; } }
.published-content[hidden] { display: none; }
.published-content { display: grid; gap: 31px; }
.published-content .reader-section { margin-bottom: 0; }
.published-resource { margin: 0; }
.glossary-resource { background: #f8f4fb; border: 1px solid #e8dff0; border-radius: 9px; padding: 18px 21px; }
.glossary-resource h2 { margin: 7px 0 13px; color: #55435f; font-size: 17px; }
.glossary-list { display: grid; grid-template-columns: minmax(100px, .35fr) 1fr; gap: 8px 16px; margin: 0; }
.glossary-list dt { color: #5f4a6b; font-size: 11px; font-weight: 800; }
.glossary-list dd { color: #756c78; font-size: 11px; line-height: 1.55; margin: 0; }
.published-error { border: 1px solid #f0dfd1; border-radius: 9px; background: #fffaf5; color: #8d6250; font-size: 12px; line-height: 1.6; padding: 18px; }
.small-text .lesson-reader { font-size: .94em; }
.small-text .section-copy p, .small-text .long-description p, .small-text .practice-card p { font-size: 12px; }