/* Shared lesson view: quick reading in a drawer, focused reading and teaching on its own page. */
.oal-lesson-launch {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 9px;
    padding: 0 30px 19px;
}
.oal-lesson-launch a { min-height: 44px; }
.oa-lesson-page {
    --oal-lesson-font: 18px;
    background: #f5f8f5;
}
.oa-lesson-page .oal-sidebar,
.oa-lesson-page .oal-mobile-toggle,
.oa-lesson-page .oal-nav-backdrop,
.oa-lesson-page .oal-topline { display: none !important; }
.oa-lesson-page .oal-main {
    margin-left: 0;
    padding: 0 clamp(18px, 3vw, 52px) 40px;
    max-width: none;
    min-width: 0;
}
.oal-lesson-toolbar {
    position: sticky;
    top: 0;
    z-index: 30;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px 24px;
    max-width: 1560px;
    margin: 0 auto;
    padding: 22px 0;
    border-bottom: 1px solid #dce7df;
    background: #f5f8f5f5;
    backdrop-filter: blur(12px);
}
.oal-lesson-heading { min-width: 0; flex: 1 1 360px; }
.oal-lesson-heading > a {
    display: inline-flex;
    align-items: center;
    min-height: 30px;
    font-size: 12px;
    font-weight: 650;
    color: #587363;
    text-decoration: none;
}
.oal-lesson-heading > a:hover { color: #17674f; text-decoration: underline; }
.oal-lesson-heading h1,
.oal-lesson-heading h2,
.oal-lesson-heading strong {
    display: block;
    margin: 4px 0 0;
    font: 700 20px/1.35 Cabin, "Open Sans", sans-serif;
    letter-spacing: -.02em;
    color: #173d31;
    overflow-wrap: anywhere;
}
.oal-lesson-heading p { margin: 3px 0 0; font-size: 12px; }
.oal-lesson-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    flex-wrap: wrap;
}
.oal-lesson-actions > button,
.oal-lesson-actions > a { min-height: 44px; }
#oal-font-decrease,
#oal-font-increase {
    min-width: 44px;
    padding: 8px;
    font-weight: 750;
    white-space: nowrap;
}
.oal-lesson-intro {
    max-width: 1560px;
    margin: 17px auto 0;
    padding: 12px 17px;
    border: 1px solid #dbe6d8;
    border-radius: 11px;
    background: #eff5ed;
    font-size: 12px;
    line-height: 1.7;
    color: #526d5b;
}
.oal-lesson-intro p { margin: 0; font-size: inherit; color: inherit; }
.oal-lesson-shell {
    display: grid;
    grid-template-columns: 240px minmax(0, 1fr);
    align-items: start;
    gap: 26px;
    max-width: 1560px;
    margin: 24px auto 0;
}
.oal-lesson-outline {
    position: sticky;
    top: 118px;
    max-height: calc(100dvh - 145px);
    overflow-y: auto;
    overscroll-behavior: contain;
    scrollbar-width: thin;
    scrollbar-gutter: stable;
    border: 1px solid #dce7df;
    border-radius: 15px;
    background: #fff;
    padding: 0 11px 13px;
}
.oal-lesson-outline > summary {
    position: sticky;
    top: 0;
    z-index: 1;
    cursor: pointer;
    padding: 18px 7px 16px;
    font-weight: 750;
    font-size: 14px;
    color: #254f3d;
    background: #fff;
    border-bottom: 1px solid #e7eee7;
}
.oal-lesson-outline nav { padding-top: 5px; }
.oal-lesson-outline nav h2,
.oal-lesson-outline nav h3 {
    margin: 20px 9px 10px;
    font-size: 11px;
    line-height: 1.55;
    letter-spacing: .035em;
    color: #7b8f80;
    text-transform: uppercase;
}
.oal-lesson-outline-link {
    display: block;
    margin: 5px 0;
    padding: 11px 11px 10px;
    min-height: 44px;
    border-radius: 10px;
    font-size: 12px;
    line-height: 1.65;
    font-weight: 600;
    color: #536e5e;
    text-decoration: none;
}
.oal-lesson-outline-link:hover { background: #f1f7f0; color: #17674f; }
.oal-lesson-outline-link[aria-current="page"] {
    background: #e7f2e8;
    color: #155b43;
    box-shadow: inset 3px 0 #287558;
}
.oal-lesson-outline-link small {
    display: block;
    margin-top: 5px;
    font-size: 10px;
    font-weight: 400;
    color: #819284;
}
.oal-lesson-main { min-width: 0; }
.oal-dialog.oal-lesson-page-view {
    display: flex;
    flex-direction: column;
    position: static;
    inset: auto;
    margin: 0;
    padding: 0;
    width: 100%;
    max-width: none;
    min-width: 0;
    height: auto;
    min-height: 520px;
    max-height: none;
    overflow: visible;
    border: 1px solid #dce7df;
    border-radius: 20px;
    background: #fff;
    box-shadow: 0 14px 42px #173d3108;
    animation: none;
}
.oal-lesson-page-view .oal-dialog-top { padding: 35px 38px 24px; }
.oal-lesson-page-view .oal-dialog-top h1,
.oal-lesson-page-view .oal-dialog-top h2 {
    max-width: none;
    margin: 10px 0 0;
    font-size: clamp(29px, 3vw, 42px);
    line-height: 1.23;
    letter-spacing: -.03em;
}
.oal-lesson-page-view .oal-eyebrow { font-size: 11px; }
.oal-lesson-page-view #oal-close-node,
.oal-lesson-page-view .oal-lesson-launch,
.oal-lesson-page-view .oal-dialog-footer { display: none; }
.oal-lesson-page-view .oal-statebar { margin: 0 38px; max-width: 650px; }
.oal-lesson-page-view .oal-statebar > button { min-height: 44px; font-size: 13px; }
.oal-lesson-page-view .oal-dialog-status { padding: 12px 38px 20px; font-size: 11px; }
.oal-lesson-page-view .oal-tabs { padding: 0 26px; gap: 2px; }
.oal-lesson-page-view .oal-tabs > button { min-height: 50px; padding: 14px 13px; font-size: 13px; }
.oal-lesson-page-view .oal-dialog-content {
    flex: 0 1 auto;
    min-height: 240px;
    padding: 31px 38px 45px;
    overflow: visible;
    overscroll-behavior: auto;
}
.oal-lesson-page-view .oal-dialog-content p,
.oal-lesson-page-view .oal-dialog-content li,
.oal-lesson-page-view .oal-thread-body,
.oal-lesson-page-view .oal-quiz-option,
.oal-lesson-page-view .oal-dialog-content label {
    font-size: var(--oal-lesson-font, 18px);
    line-height: 1.85;
    color: #4a6552;
}
.oal-lesson-page-view .oal-dialog-content p,
.oal-lesson-page-view .oal-rich-section,
.oal-lesson-page-view .oal-checklist { max-width: 80ch; }
.oal-lesson-page-view .oal-dialog-content h3 { font-size: 26px; margin-top: 30px; }
.oal-lesson-page-view .oal-dialog-content h4 { font-size: 21px; }
.oal-lesson-page-view .oal-node-lead { font-size: calc(var(--oal-lesson-font, 18px) + 1px) !important; }
.oal-lesson-page-view .oal-step-list { max-width: 86ch; }
.oal-lesson-page-view .oal-guide p,
.oal-lesson-page-view .oal-example p { font-size: var(--oal-lesson-font, 18px); }
.oal-lesson-page-view .oal-rich-disclosure,
.oal-lesson-page-view .oal-muted,
.oal-lesson-page-view .oal-private-note,
.oal-lesson-page-view .oal-quiz-history {
    font-size: 13px !important;
    line-height: 1.8;
}
.oal-lesson-page-view .oal-prompt pre {
    font-size: calc(var(--oal-lesson-font, 18px) - 2px);
    line-height: 1.9;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
}
.oal-lesson-page-view .oal-prompt > summary,
.oal-lesson-page-view .oal-faq > summary,
.oal-lesson-page-view .oal-resource-list strong { font-size: 17px; line-height: 1.7; }
.oal-lesson-page-view .oal-resource-list > a { min-width: 0; }
.oal-lesson-page-view .oal-resource-list a,
.oal-lesson-page-view .oal-thread-body a { overflow-wrap: anywhere; }
.oal-lesson-page-view .oal-dialog-content img { max-width: 100%; height: auto; }
.oal-lesson-page-view .oal-dialog-content table { max-width: 100%; }
.oal-lesson-page-view .oal-video { max-width: 1000px; }
.oal-lesson-page-view .oal-video-placeholder { max-width: 1000px; }
.oal-lesson-pagination {
    display: flex;
    align-items: stretch;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 20px;
}
.oal-lesson-pagination a { min-height: 46px; max-width: 100%; }
.oal-lesson-pagination a:first-child { margin-right: auto; }
.oa-lesson-page :focus-visible { outline: 3px solid #e9a263; outline-offset: 3px; }

/* Redacted teaching data is enforced by the server; these rules keep projection controls focused. */
.oa-lesson-page.oal-is-teaching .oal-statebar,
.oa-lesson-page.oal-is-teaching .oal-dialog-status,
.oa-lesson-page.oal-is-teaching #oal-tab-notes,
.oa-lesson-page.oal-is-teaching #oal-panel-notes,
.oa-lesson-page.oal-is-teaching #oal-quiz-form button[type="submit"],
.oa-lesson-page.oal-is-teaching .oal-note-actions { display: none !important; }
.oa-lesson-page.oal-presenting { background: #f8faf6; }
.oa-lesson-page.oal-presenting .oal-main { padding-inline: clamp(18px, 4vw, 72px); }
.oal-presenting .oal-lesson-toolbar { max-width: 1420px; background: #f8faf6f5; }
.oal-presenting .oal-lesson-heading { flex-basis: 300px; }
.oal-presenting .oal-lesson-heading > a { font-size: 11px; }
.oal-presenting .oal-lesson-outline,
.oal-presenting .oal-lesson-intro { display: none; }
.oal-presenting .oal-lesson-shell { display: block; max-width: 1420px; margin-top: 24px; }
.oal-presenting .oal-dialog.oal-lesson-page-view {
    border: 0;
    border-radius: 18px;
    box-shadow: 0 15px 60px #173d3106;
}
.oal-presenting .oal-lesson-page-view .oal-dialog-top { padding-top: 32px; }
.oal-presenting .oal-lesson-page-view .oal-dialog-content { padding-bottom: 55px; }
.oal-presenting .oal-lesson-page-view .oal-dialog-top h1,
.oal-presenting .oal-lesson-page-view .oal-dialog-top h2 { font-size: clamp(32px, 3.3vw, 48px); }
.oal-presenting .oal-lesson-page-view .oal-dialog-content p { max-width: 78ch; }
.oal-presenting .oal-lesson-pagination { max-width: 1420px; margin: 20px auto 0; }

@media (min-width: 1750px) {
    .oal-lesson-shell { grid-template-columns: 250px minmax(0, 1fr); gap: 32px; }
}
@media (max-width: 1100px) {
    .oal-lesson-shell { grid-template-columns: 215px minmax(0, 1fr); gap: 18px; }
    .oal-lesson-page-view .oal-dialog-top { padding: 27px 26px 21px; }
    .oal-lesson-page-view .oal-dialog-content { padding: 26px 27px 35px; }
    .oal-lesson-page-view .oal-statebar { margin-inline: 26px; }
    .oal-lesson-page-view .oal-dialog-status { padding-inline: 27px; }
    .oal-lesson-page-view .oal-tabs { padding-inline: 15px; }
}
@media (max-width: 850px) {
    .oal-lesson-toolbar { position: static; padding: 18px 0; gap: 14px; }
    .oal-lesson-heading { flex-basis: 100%; }
    .oal-lesson-heading strong,
    .oal-lesson-heading h1,
    .oal-lesson-heading h2 { font-size: 19px; }
    .oal-lesson-actions { width: 100%; justify-content: flex-start; }
    .oal-lesson-shell { grid-template-columns: 1fr; margin-top: 18px; }
    .oal-lesson-outline { position: static; max-height: 350px; padding-bottom: 0; }
    .oal-lesson-outline[open] { padding-bottom: 10px; }
    .oal-lesson-outline > summary { padding-block: 14px; }
    .oal-lesson-outline nav { display: grid; grid-template-columns: 1fr 1fr; gap: 0 8px; }
    .oal-lesson-outline nav h2,
    .oal-lesson-outline nav h3 { grid-column: 1 / -1; }
    .oal-lesson-outline-link { margin: 3px 0; }
    .oal-presenting .oal-lesson-toolbar { position: static; }
}
@media (max-width: 620px) {
    .oal-lesson-launch { padding: 0 20px 17px; gap: 8px; }
    .oal-lesson-launch a { width: 100%; }
    .oa-lesson-page .oal-main,
    .oa-lesson-page.oal-presenting .oal-main { padding: 0 14px 30px; }
    .oal-lesson-toolbar { padding-block: 15px; }
    .oal-lesson-heading > a { min-height: 44px; }
    .oal-lesson-heading strong,
    .oal-lesson-heading h1,
    .oal-lesson-heading h2 { font-size: 18px; }
    .oal-lesson-actions { gap: 7px; }
    .oal-lesson-actions > a,
    .oal-lesson-actions > button { font-size: 11px !important; padding-inline: 11px; }
    .oal-lesson-intro { margin-top: 12px; padding: 11px 13px; font-size: 11px; }
    .oal-lesson-shell { gap: 15px; }
    .oal-lesson-outline nav { display: block; }
    .oal-dialog.oal-lesson-page-view { border-radius: 15px; min-height: 420px; }
    .oal-lesson-page-view .oal-dialog-top { padding: 24px 20px 19px; }
    .oal-lesson-page-view .oal-dialog-top h1,
    .oal-lesson-page-view .oal-dialog-top h2,
    .oal-presenting .oal-lesson-page-view .oal-dialog-top h1,
    .oal-presenting .oal-lesson-page-view .oal-dialog-top h2 { font-size: 27px; line-height: 1.25; }
    .oal-lesson-page-view .oal-eyebrow { font-size: 10px; }
    .oal-lesson-page-view .oal-statebar { margin-inline: 18px; }
    .oal-lesson-page-view .oal-statebar > button { font-size: 11px; padding-inline: 5px; }
    .oal-lesson-page-view .oal-dialog-status { padding: 10px 20px 15px; font-size: 10px; }
    .oal-lesson-page-view .oal-tabs { padding-inline: 8px; }
    .oal-lesson-page-view .oal-tabs > button { font-size: 12px; padding-inline: 11px; }
    .oal-lesson-page-view .oal-dialog-content { padding: 23px 20px 31px; }
    .oal-lesson-page-view .oal-dialog-content h3 { font-size: 23px; }
    .oal-lesson-page-view .oal-dialog-content h4 { font-size: 20px; }
    .oal-lesson-page-view .oal-prompt > summary,
    .oal-lesson-page-view .oal-faq > summary { font-size: 16px; }
    .oal-lesson-page-view .oal-prompt pre { font-size: calc(var(--oal-lesson-font, 18px) - 3px); }
    .oal-lesson-pagination { display: grid; grid-template-columns: 1fr; gap: 9px; }
    .oal-lesson-pagination a { width: 100%; margin: 0 !important; }
}
@media (prefers-reduced-motion: reduce) {
    .oal-lesson-page-view,
    .oal-lesson-outline-link { animation: none; transition: none; }
}
@media print {
    .oal-lesson-toolbar,
    .oal-lesson-outline,
    .oal-lesson-pagination,
    .oal-lesson-intro,
    .oal-lesson-page-view .oal-statebar,
    .oal-lesson-page-view .oal-dialog-status,
    .oal-lesson-page-view .oal-tabs,
    .oal-lesson-page-view #oal-panel-notes { display: none !important; }
    .oa-lesson-page .oal-main { padding: 0; }
    .oal-lesson-shell { display: block; max-width: none; margin: 0; }
    .oal-dialog.oal-lesson-page-view { border: 0; box-shadow: none; }
    .oal-lesson-page-view .oal-dialog-content { padding: 10px 0; }
}

/* Reading focus keeps personal study controls available; teaching uses a redacted server response. */
.oa-lesson-page.oal-reading-focus .oal-lesson-outline{display:none}
.oa-lesson-page.oal-reading-focus .oal-lesson-shell{grid-template-columns:minmax(0,1fr)}
.oa-lesson-page #oal-tabs{scroll-margin-top:105px}