/* The chosen single-page poster is the lesson's actual working surface. */
/* Wide horizontal tiles follow the supplied lesson poster. */
.in-lesson .reference-shell>.study-bar{display:none}
.in-lesson .reference-shell>.catalog-view{padding:0;background:transparent;border:0;box-shadow:none}
.in-lesson .catalog-crumbs{padding:12px 18px;margin:0;background:#effffb;border-radius:16px 16px 0 0}
.lesson-poster{overflow:hidden;background:#edfcfa}
.lesson-poster-top{display:grid;grid-template-columns:minmax(0,23fr) minmax(0,47fr) minmax(0,30fr);gap:12px;align-items:center;padding:12px 12px 0 0}
.lesson-dna{align-self:stretch;min-height:395px;background:url('/biology-surround.png?v=upper-abdomen') left center/auto 100% no-repeat;display:flex;align-items:flex-start;justify-content:center}
.lesson-dna p{margin:18px 10px 0 35px;font-weight:800;font-style:italic;font-size:1.125rem;color:#064c58;text-shadow:0 1px white;background:#eefffaaf;border-radius:12px;padding:10px}
.lesson-poster-center{display:grid;gap:20px;min-width:0;padding:12px 0}
.poster-clock{padding:20px 15px;border:5px solid #7be6d5;border-radius:40px;background:linear-gradient(135deg,#20caba,#029f9e 55%,#008599);color:white;text-align:center;box-shadow:inset 0 3px 1px #ffffff66,0 8px 0 #008c9114}
.poster-clock>span{font-size:1.3rem;font-weight:800}.poster-clock>strong{display:block;font-size:clamp(2.4rem,4vw,4rem);font-variant-numeric:tabular-nums;line-height:1.25;letter-spacing:-2px;font-weight:800;margin:10px 0}
.poster-clock>small{font-size:1rem;display:block;line-height:1.6}.poster-clock>p{font-size:1.125rem;font-style:italic;margin:15px 0 0}
.poster-title{display:flex;gap:16px;align-items:center;padding:25px 20px;border:2px solid #ffc7a5;border-radius:24px;background:linear-gradient(125deg,#ff9467,#fc7558 55%,#ee604f);color:#123e4c;box-shadow:0 5px 0 #d15c3b20}
.poster-title-icon{color:#007f7b;background:#fff6ed;display:grid;place-items:center;width:58px;height:74px;border-radius:16px;flex-shrink:0}.poster-title-icon svg{width:40px;height:40px}
.poster-title h1{font-size:clamp(1.45rem,2.5vw,2.3rem);line-height:1.2;margin:5px 0 10px;overflow-wrap:anywhere}.poster-title p{font-size:1.125rem;margin:0;font-weight:700}.poster-title .eyebrow{font-size:.875rem;color:#3f3a2e;letter-spacing:.04em}
.lesson-anatomy{margin:0;min-width:0;align-self:center}.lesson-anatomy figcaption{text-align:center;font-size:1.2rem;font-style:italic;font-weight:700}.lesson-anatomy img{display:block;width:100%;height:auto;max-height:460px;object-fit:contain;mix-blend-mode:multiply}
.lesson-welcome-strip{display:flex;align-items:center;gap:18px;flex-wrap:wrap;padding:12px 20px;background:linear-gradient(90deg,#ecfff8,#fff,#e8fcfa);border-bottom:2px solid #b6e9de}
.lesson-student{width:130px;height:155px;object-fit:cover;object-position:top;border:5px solid #8ce1d0;border-radius:50%;background:#cff5ec}
.lesson-welcome-strip h2{font-size:1.5rem;margin:0 0 8px}.lesson-welcome-strip p{font-size:1rem;margin:5px 0;color:#315e6a}
.lesson-welcome-strip .visitor-badge{margin-left:auto;padding:18px;background:#e4f8fa;border:1px solid #b4dfe0}.lesson-welcome-strip .visitor-badge strong{font-size:1.8rem}
.poster-study{font:inherit;font-weight:800;border:2px solid #a1edda;border-radius:17px;background:linear-gradient(135deg,#00ad82,#007f81);color:white;padding:18px;cursor:pointer}.poster-study small{display:block;font-size:1rem;margin-top:7px}
.in-lesson .lesson-layout{padding:22px 18px;background:#f8fffd;border:2px solid white;border-radius:24px;margin-top:16px;grid-template-columns:minmax(0,1fr) 300px}
.in-lesson .resource-panel{padding:0;background:transparent;border:0;box-shadow:none}
.in-lesson .resource-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.in-lesson .resource-tile{min-height:168px;display:flex;flex-direction:column;justify-content:center;padding:16px;border:2px solid #ffffff;border-bottom-width:5px;box-shadow:0 4px 0 #11605c12}
.in-lesson .resource-heading h2{font-size:1.7rem}.in-lesson .resource-symbol{width:50px;height:54px}.in-lesson .resource-symbol svg{width:32px;height:32px}
.in-lesson .assistant-panel{background:linear-gradient(145deg,#d6f8f2,#efffff);border:2px solid #a0dfdb;border-radius:22px}
.in-lesson .scientist-note{display:none}
@media(max-width:1100px){.in-lesson .lesson-layout{grid-template-columns:minmax(0,1fr) 260px}.in-lesson .resource-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.lesson-welcome-strip{gap:12px}.lesson-welcome-strip .visitor-badge{margin-left:0}.poster-title{padding:18px 12px;gap:10px}}
@media(max-width:760px){.lesson-poster-top{grid-template-columns:1fr;position:relative;padding:14px}.lesson-dna{display:none}.lesson-poster-center{padding:0}.poster-clock{border-radius:35px;padding:22px 12px}.poster-clock>strong{font-size:3.3rem;letter-spacing:-1px}.poster-title h1{font-size:1.6rem}.lesson-anatomy{max-width:280px;justify-self:center}.lesson-anatomy img{max-height:320px}.lesson-anatomy figcaption{font-size:1rem}.lesson-student{width:95px;height:115px}.lesson-welcome-strip{padding:14px}.lesson-welcome-strip>div:nth-child(2){flex:1;min-width:170px}.lesson-welcome-strip h2{font-size:1.3rem}.lesson-welcome-strip .visitor-badge{flex:1}.poster-study{flex:1}.in-lesson .lesson-layout{padding:16px 12px;grid-template-columns:1fr}.in-lesson .resource-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.in-lesson .resource-tile{padding:12px;min-height:160px}}
@media(max-width:390px){.in-lesson .resource-grid{grid-template-columns:1fr}.poster-clock>strong{font-size:2.8rem}}

/* Final poster composition, shared by every unlocked lesson. */
.in-lesson .reference-shell{max-width:1360px}
.in-lesson .lesson-poster-top{grid-template-columns:27fr 43fr 30fr;gap:8px;align-items:center}
.in-lesson .poster-clock{border-radius:65px;padding:25px 12px}
.in-lesson .poster-title{border-radius:22px;padding:24px 16px}
.in-lesson .lesson-welcome-strip{border:0;border-radius:24px;margin-top:10px;box-shadow:0 2px 15px #1ba59b12}
.in-lesson .lesson-student{width:140px;height:150px;border:5px solid #70d9c4;border-radius:50%;object-fit:contain;background:#d1f8eb}
.in-lesson .lesson-layout{grid-template-columns:minmax(0,72fr) minmax(250px,28fr);gap:14px;padding:22px 16px;margin-top:16px;border-radius:27px;background:#ffffffdd}
.in-lesson .resource-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.in-lesson .resource-tile{display:grid;grid-template-columns:44px minmax(0,1fr);align-content:center;align-items:center;column-gap:12px;row-gap:3px;min-height:150px;padding:16px 12px;border-radius:15px;color:#fff;background:linear-gradient(125deg,color-mix(in srgb,var(--tile) 76%,white),var(--tile));border:1px solid #ffffffa0;border-bottom:4px solid color-mix(in srgb,var(--tile) 85%,#004459);box-shadow:inset 0 2px 0 #ffffff38,0 3px 8px #008a9712}
.in-lesson .resource-tile .resource-symbol{grid-column:1;grid-row:1/4;align-self:center;width:44px;height:56px;padding:8px;margin:0;border-radius:13px;box-sizing:border-box;display:grid;place-items:center}
.in-lesson .resource-tile .resource-symbol svg{width:29px;height:29px}
.in-lesson .resource-panel .resource-tile strong{grid-column:2;font-size:1.125rem;line-height:1.3;margin:0;overflow-wrap:normal}
.in-lesson .resource-panel .resource-tile>span[lang]{grid-column:2;font-size:1rem;line-height:1.4;margin:0}
.in-lesson .resource-tile>small{display:none}
.in-lesson .resource-tile .resource-status{grid-column:2;justify-self:start;font-size:.875rem;line-height:1.3;padding:3px 5px;margin-top:6px;color:#fff;background:#06445675;border:0}
.in-lesson .resource-tile:nth-child(3),.in-lesson .resource-tile:nth-child(9){color:#123e4c}
.in-lesson .resource-tile:nth-child(3) .resource-status,.in-lesson .resource-tile:nth-child(9) .resource-status{color:#163e4a;background:#ffffffe0}
.in-lesson .resource-tile[data-pdf] .resource-status{background:#fff;color:#a52345}
.in-lesson .assistant-heading{display:flex;flex-wrap:wrap;gap:10px}
.in-lesson .assistant-heading .assistant-mascot{height:95px;width:95px}
.in-lesson .assistant-panel{border-radius:18px;padding:16px;background:linear-gradient(140deg,#c2f1eb,#effdfb 70%);border:2px solid #a7e4df}
.in-lesson .nature-world{margin-top:0;border-radius:0;background-size:100% 100%}
@media(max-width:960px){.in-lesson .lesson-layout{grid-template-columns:1fr}.in-lesson .lesson-sidebar{grid-template-columns:1fr}.in-lesson .assistant-panel{display:grid;grid-template-columns:1fr 1fr;gap:10px 20px}.in-lesson .assistant-heading{margin:0}.in-lesson .assistant-example{margin:0}.in-lesson .assistant-scope{line-height:1.6}.in-lesson .resource-tile{min-height:145px}}
@media(max-width:760px){.in-lesson .lesson-poster-top{grid-template-columns:1fr}.in-lesson .poster-clock{border-radius:35px}.in-lesson .resource-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.in-lesson .resource-tile{grid-template-columns:36px minmax(0,1fr);padding:12px 9px;column-gap:8px}.in-lesson .resource-tile .resource-symbol{width:36px;height:48px;padding:5px}.in-lesson .resource-panel .resource-tile strong{font-size:1.0625rem}.in-lesson .lesson-student{width:100px;height:130px}.in-lesson .assistant-panel{grid-template-columns:1fr}.in-lesson .nature-world{background-size:auto 100%}}
@media(max-width:420px){.in-lesson .resource-grid{grid-template-columns:1fr}.in-lesson .resource-tile{grid-template-columns:48px minmax(0,1fr);min-height:115px;padding:14px;gap:4px 14px}.in-lesson .resource-tile .resource-symbol{width:48px;height:58px}.in-lesson .resource-panel .resource-tile strong{font-size:1.25rem}}

.biolab-dialog{width:96vw;max-width:1500px;height:94dvh;max-height:96dvh;padding:0;border:2px solid #13b9b3;border-radius:22px;background:#07101e;color:white}.biolab-dialog::backdrop{background:#002c39b8}.biolab-dialog[open]{display:flex;flex-direction:column}.biolab-dialog>header{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:12px 18px;background:#008e94;flex-wrap:wrap}.biolab-dialog button{border:0;border-radius:10px;padding:10px;font-weight:800;cursor:pointer;background:white;color:#004951}.biolab-dialog iframe{width:100%;flex:1;border:0;min-height:0}

/* Compact, unbroken visit totals and a shorter mobile introduction. */
.visitor-badge strong,#homeVisitors,#lessonVisitors{white-space:nowrap;word-break:normal;overflow-wrap:normal;flex-shrink:0;font-variant-numeric:tabular-nums;direction:ltr}
.lesson-welcome-strip .visitor-badge{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:10px;padding:10px 14px;min-width:180px}
.lesson-welcome-strip .visitor-badge strong{font-size:1.5rem}.lesson-welcome-strip .visitor-badge small{display:block;font-size:.75rem}
.in-lesson .resource-tile.is-open{box-shadow:inset 0 2px 0 #ffffff8a,0 6px 19px #0a77743b;border-color:#ffffffee;transition:transform .26s ease,box-shadow .26s ease}
.in-lesson .resource-tile.is-open:is(:hover,:focus-visible){transform:translateY(-3px);box-shadow:inset 0 2px 0 #ffffffbb,0 13px 27px #0a777456}
.in-lesson .resource-live{grid-column:2;justify-self:start;display:inline-flex;align-items:center;gap:6px;flex-wrap:wrap;margin-top:5px;padding:5px 9px;border-radius:999px;background:linear-gradient(110deg,#fff,#dcfff0);color:#065c41;border:1px solid #c6f3dc;font-size:.82rem;font-weight:900;line-height:1.3;box-shadow:0 0 0 2px #ffffff48,0 0 14px #c7ffd86e;animation:resourceAvailableGlow 3.3s ease-in-out infinite}
.in-lesson .resource-live span[lang]{font-size:inherit;font-weight:inherit}.in-lesson .resource-live-dot{display:inline-block;flex:none;width:9px;height:9px;border-radius:50%;background:#05a85d;box-shadow:0 0 0 3px #4ff3a044,0 0 8px #18e685;animation:resourceAvailableDot 2.4s ease-in-out infinite}
.in-lesson .resource-tile.is-open .resource-status{margin-top:4px}
@keyframes resourceAvailableGlow{50%{box-shadow:0 0 0 2px #ffffff76,0 0 18px #c7ffdcb8}}
@keyframes resourceAvailableDot{50%{opacity:.55;box-shadow:0 0 0 5px #4ff3a022,0 0 4px #18e685}}
@media(prefers-reduced-motion:reduce){.in-lesson .resource-live,.in-lesson .resource-live-dot{animation:none}.in-lesson .resource-tile.is-open{transition:none}}
@media(max-width:760px){.lesson-anatomy{max-width:170px}.lesson-anatomy img{max-height:175px}.lesson-anatomy figcaption{font-size:.8rem}.poster-clock{padding:12px;border-radius:24px}.poster-clock>strong{font-size:2.4rem}.poster-clock p{margin:5px;font-size:.85rem}.lesson-welcome-strip{display:grid;grid-template-columns:56px minmax(0,1fr);gap:10px;padding:12px}.lesson-student{width:56px;height:76px}.lesson-welcome-strip>div:nth-child(2){min-width:0}.lesson-welcome-strip h2{font-size:1.05rem;margin-bottom:4px}.lesson-welcome-strip p{font-size:.8rem;line-height:1.4;margin:3px 0}.lesson-welcome-strip .visitor-badge{grid-column:1/-1;width:100%;min-width:0;margin:0;padding:7px 12px;font-size:.8rem}.lesson-welcome-strip .visitor-badge strong{font-size:1.4rem}.poster-study{grid-column:1/-1;padding:10px;font-size:1rem}.poster-study small{font-size:.8rem}}

/* Water lesson resources: stronger icon contrast and a more legible available badge. */
.in-lesson .water-resource-panel .resource-tile{color:#fff;background:linear-gradient(125deg,color-mix(in srgb,var(--tile) 88%,#073b56),color-mix(in srgb,var(--tile) 82%,#073b56));border-color:#ffffffc7;box-shadow:inset 0 2px 0 #ffffff40,0 6px 15px #073b562e}
.in-lesson .water-resource-panel .resource-symbol{background:#fff;border-color:#d8f6f1;box-shadow:0 4px 12px #002f4b40;color:color-mix(in srgb,var(--tile) 62%,#073b56)}
.in-lesson .water-resource-panel .resource-tile:nth-child(3),.in-lesson .water-resource-panel .resource-tile:nth-child(9){color:#fff}
.in-lesson .water-resource-panel .resource-tile .resource-status{color:#fff;background:#06394f9c}
.in-lesson .water-resource-panel .resource-live{font-size:.95rem;font-weight:900;line-height:1.35;padding:7px 11px;color:#fff;background:linear-gradient(110deg,#075f4c,#068462);border:2px solid #bbffe0;box-shadow:0 0 0 2px #073d3966,0 0 18px #43ef9ab8;animation:waterAvailableGlow 3.2s ease-in-out infinite}
.in-lesson .water-resource-panel .resource-live span[lang]{font-size:1em;font-weight:900}
.in-lesson .water-resource-panel .resource-live-dot{background:#afffd5;box-shadow:0 0 0 3px #afffd570,0 0 11px #b6ffe2}
@keyframes waterAvailableGlow{50%{box-shadow:0 0 0 3px #b5ffdc96,0 0 25px #5affa8e8}}
@media(prefers-reduced-motion:reduce){.in-lesson .water-resource-panel .resource-live{animation:none}}

/* Final review resource: a distinctive BioGenius card while the summary is prepared. */
.in-lesson .resource-panel .resource-tile.summary-tile{color:#fff;background:linear-gradient(135deg,#123b59,#082c46 65%,#073e4c);border:2px solid #45d5bf;border-bottom:5px solid #078f8c;box-shadow:inset 0 1px 0 #ffffff32,0 7px 15px #052d4d33,0 0 0 2px #72e4cf32;min-height:168px}
.in-lesson .resource-panel .resource-tile.summary-tile:is(:hover,:focus-visible){box-shadow:inset 0 1px 0 #ffffff4a,0 13px 24px #052d4d45,0 0 20px #2de2c16e}
.in-lesson .resource-tile.summary-tile .resource-symbol{color:#086f83;background:#f8fffc;border:1px solid #b5f3e2;box-shadow:0 3px 12px #22d6bc61}
.in-lesson .resource-tile.summary-tile .summary-tagline{grid-column:2;font-size:.83rem;line-height:1.45;font-weight:650;color:#d9fff6;margin-top:3px}
.in-lesson .resource-tile.summary-tile .summary-tagline span{display:block;font-size:.84rem;font-weight:700}
.in-lesson .resource-tile.summary-tile .resource-status{grid-column:2;color:#e9fffb;background:#0b776e9c;border:1px solid #77ead1;margin-top:6px}
.in-lesson .resource-panel .resource-tile.visual-review-tile{color:#fff;background:linear-gradient(130deg,#2459b4,#0d729e 65%,#0e8f95);border:2px solid #8be2df;border-bottom:5px solid #1d69ad;box-shadow:inset 0 1px 0 #ffffff5a,0 7px 16px #0e588733}
.in-lesson .resource-panel .resource-tile.visual-review-tile:is(:hover,:focus-visible){box-shadow:inset 0 1px 0 #ffffff88,0 12px 24px #0b5e9566,0 0 18px #41d4d477}
.in-lesson .resource-tile.visual-review-tile .resource-symbol{color:#155ba6;background:#fff;border:1px solid #b6e5ef}
.in-lesson .resource-tile.visual-review-tile .summary-tagline{grid-column:2;font-size:.83rem;line-height:1.45;font-weight:700;color:#e6fffa;margin-top:3px}
.in-lesson .resource-tile.visual-review-tile .summary-tagline span{display:block}
.in-lesson .resource-tile.visual-review-tile .resource-status{grid-column:2;color:#eafffb;background:#094775a3;border:1px solid #8de8f4;margin-top:6px}
.in-lesson .resource-panel .resource-tile.infographic-tile{color:#fff;background:linear-gradient(132deg,#106a75,#0a8f90 58%,#12a47e);border:2px solid #8ce9d6;border-bottom:5px solid #087877;box-shadow:inset 0 1px 0 #ffffff63,0 8px 18px #075c653d}
.in-lesson .resource-panel .resource-tile.infographic-tile:is(:hover,:focus-visible){box-shadow:inset 0 1px 0 #ffffff99,0 13px 26px #075c6566,0 0 20px #38dfbb77}
.in-lesson .resource-tile.infographic-tile .resource-symbol{color:#087b82;background:#fff;border:1px solid #b8f0e4;box-shadow:0 4px 12px #004d5842}
.in-lesson .resource-tile.infographic-tile .summary-tagline{grid-column:2;font-size:.83rem;line-height:1.45;font-weight:700;color:#e9fff9;margin-top:3px}
.in-lesson .resource-tile.infographic-tile .summary-tagline span{display:block}
.in-lesson .resource-tile.infographic-tile .resource-status{grid-column:2;color:#edfffb;background:#075c60a6;border:1px solid #8ce8d5;margin-top:6px}

.lesson-video-dialog{max-width:1120px;background:#06172b}.lesson-video-dialog>header strong{line-height:1.5}.lesson-video-dialog>header strong span{display:inline-block;margin-inline-start:8px}.lesson-video-body{display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:16px;padding:18px;overflow:auto;min-height:0}.lesson-video-screen{min-width:0}.lesson-video-screen h2{font-size:clamp(17px,2vw,23px);margin:0 0 12px;color:#e7fcff}.lesson-video-screen video{display:block;width:100%;max-height:calc(94dvh - 165px);aspect-ratio:16/9;background:#000;border-radius:12px}.lesson-video-parts{display:flex;flex-direction:column;gap:10px}.lesson-video-dialog .lesson-video-parts button{background:#17334d;border:1px solid #4085a4;color:#fff;text-align:start;display:flex;flex-direction:column;gap:5px;line-height:1.4}.lesson-video-dialog .lesson-video-parts button[aria-pressed="true"]{background:#087f9c;border-color:#b3f3ff}.lesson-video-parts button span[lang="ar"]{width:100%;text-align:right}@media(max-width:720px){.lesson-video-dialog{width:98vw;height:96dvh}.lesson-video-body{display:block;padding:12px}.lesson-video-screen video{max-height:52dvh}.lesson-video-parts{margin-top:14px}.lesson-video-dialog .lesson-video-parts button{width:100%}}
.presentation-parts{display:flex;gap:10px;align-items:center;flex-wrap:wrap;padding:10px 16px;background:#073c50}
.presentation-parts button{font:inherit;font-weight:800;background:#e9f8f7;color:#0a4755;border:2px solid transparent;border-radius:10px;padding:9px 13px;cursor:pointer}
.presentation-parts button span[lang="ar"]{display:block;font-size:.88em;line-height:1.4;text-align:start}
.presentation-parts button[aria-current="true"],.presentation-parts button[aria-current="page"]{background:#fff;border-color:#42d3c3;color:#06344c}
.presentation-parts button:focus-visible{outline:3px solid #f4c350;outline-offset:2px}
.biolab-dialog.presentation-expanded{position:fixed;inset:0;margin:0;width:100vw;max-width:none;height:100dvh;max-height:none;border-radius:0}
.biolab-dialog.presentation-expanded>header,.biolab-dialog.presentation-expanded>.presentation-parts{display:none}

.lesson-seo-summary{max-width:1160px;margin:18px auto 24px;padding:18px 22px;border:1px solid #cde6e6;border-radius:16px;background:#f7fcfc;color:#183b56;font-size:16px;line-height:1.55}.lesson-seo-summary p{margin:0 0 12px}.lesson-share,.google-lesson-metric button{border:0;border-radius:10px;background:#096a76;color:white;padding:10px 16px;font:inherit;font-weight:700;cursor:pointer}.lesson-share:focus-visible,.google-lesson-metric button:focus-visible{outline:3px solid #0cb6bc;outline-offset:3px}.lesson-share-status{margin-inline-start:12px}.google-lesson-metric{margin:24px 0;padding:20px;border:1px solid #b4d9dc;border-radius:16px;background:#f4fcfc;color:#183b56}.google-lesson-metric h2{margin:0 0 6px}.google-lesson-metric p{margin:0 0 15px}.google-lesson-metric strong{display:inline-block;margin:0 14px;font-size:24px}.google-lesson-metric small{display:block;margin-top:10px;line-height:1.45}@media(max-width:700px){.lesson-seo-summary{margin:14px 10px 22px;padding:16px}.google-lesson-metric{margin:18px 0}}