body.public-science,.science-course{--science-complete:#285e40;--science-in-progress:#ad7218;--science-pending:#a9b39f;--science-mobile-nav-height:88px;--trail-green:#285e40;--trail-ink:#214b3a;--trail-muted:#64735f;--trail-paper:#fffef8;--trail-track:#e4e9d9;margin:0;background:#fffef8;color:#174f3c;min-height:100dvh;padding:0}
.public-science-header{max-width:1100px;margin:auto;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:20px 24px}
.public-science-header>a{display:flex;align-items:center;gap:12px;text-decoration:none;color:inherit;font-size:1.15rem;font-weight:850}
.public-science-header img{object-fit:contain;flex:none}
.public-science-header small{display:block;font-size:.78rem;font-weight:600;color:#67806b;margin-top:2px}
.public-science-badge{font-size:.82rem;padding:8px 12px;border:1px solid #dbe7d0;border-radius:999px;background:#f0f6e8;color:#4d7259;white-space:nowrap}
#science-content{padding:12px 24px;max-width:1148px;margin:auto;min-height:65dvh;outline:none}
:is(.public-science,.science-course) .view-wrap{padding-top:0}
:is(.public-science,.science-course) .science-topic-hero{display:grid;grid-template-columns:minmax(0,1fr);gap:10px;background:#edf5e6;padding:28px}
:is(.public-science,.science-course) .science-topic-hero h1{font-size:clamp(1.9rem,4vw,2.8rem);line-height:1.08;max-width:none;margin:0}
:is(.public-science,.science-course) .science-topic-progress{width:100%;max-width:none;margin-top:10px}
:is(.public-science,.science-course) .science-topic-progress>span:first-child{justify-content:flex-start;gap:.4em}
:is(.public-science,.science-course) .science-game-art{min-height:180px}
.public-science-footer{max-width:1100px;margin:auto;padding:16px 24px 28px;color:#6b7d6a;font-size:.83rem;text-align:center;border-top:1px solid #e4ebde}
.public-science-loading,.public-science-error{min-height:52dvh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:12px;padding:24px}
.public-science-loading img,.public-science-error img{width:min(260px,70vw);height:180px;object-fit:contain}
.public-science-loading strong{font-size:1.35rem}
.public-science-loading span{color:#69836c}
.public-science-loading i{display:block;width:140px;height:6px;background:#e0ebd8;border-radius:999px;overflow:hidden}
.public-science-loading i:after{content:'';display:block;background:#7aa365;width:45%;height:100%;border-radius:inherit;animation:science-public-loading 1.2s ease-in-out infinite alternate}
@keyframes science-public-loading{to{transform:translateX(120%)}}
@media(max-width:600px){.public-science-header{padding:16px;gap:10px}.public-science-badge{display:none}#science-content{padding:8px 14px}:is(.public-science,.science-course) .science-topic-hero{padding:20px 18px;gap:8px}:is(.public-science,.science-course) .science-topic-hero h1{font-size:2rem}:is(.public-science,.science-course) .science-unit-summary{grid-template-columns:1fr 1fr;gap:10px}:is(.public-science,.science-course) .science-summary-card{padding:14px}:is(.public-science,.science-course) .science-summary-card strong{font-size:1.3rem}:is(.public-science,.science-course) .science-summary-card span{font-size:.85rem}.public-science-footer{padding:16px}}
@media(prefers-reduced-motion:reduce){.public-science-loading i:after{animation:none}}

/* Public and signed-in lessons share the same card and fixed navigation rows. */
body.public-science:has(.science-theory-page){height:100dvh;min-height:0;display:grid;grid-template-rows:auto minmax(0,1fr);overflow:hidden}
.public-science:has(.science-theory-page) .public-science-footer{display:none}
.public-science:has(.science-theory-page) #science-content{min-height:0;height:100%;width:100%;max-width:680px;margin:auto;padding:0;overflow:hidden}
.public-science:has(.science-theory-page) .public-science-header{width:100%;padding-block:10px}

/* A mobile learning trail. Artwork is contained inside the leaf, with the
   progress SVG outside its bounding circle, including the pointed corner. */
:is(.public-science,.science-course) .science-learning-trail{--trail-green:#285e40;--trail-ink:#214b3a;--trail-muted:#64735f;--trail-paper:#fffef8;--trail-track:#e4e9d9;max-width:1000px;margin:0 auto;color:var(--trail-ink);padding-bottom:30px}
:is(.public-science,.science-course) .science-trail-intro{padding:20px 22px 26px;max-width:640px}
:is(.public-science,.science-course) .science-trail-intro .science-eyebrow{font-size:.73rem;letter-spacing:.15em;color:var(--trail-muted)}
:is(.public-science,.science-course) .science-trail-intro h1{font-size:clamp(2rem,4.4vw,3rem);line-height:1.08;letter-spacing:-.045em;margin:10px 0 14px;max-width:510px}
:is(.public-science,.science-course) .science-trail-intro p{display:flex;align-items:center;flex-wrap:wrap;gap:6px;font-size:.82rem;color:var(--trail-muted);margin:0}
:is(.public-science,.science-course) .science-trail-intro p .ui-icon{width:17px;height:17px;color:var(--trail-green)}
:is(.public-science,.science-course) .science-trail-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:45px;align-items:start}
:is(.public-science,.science-course) .science-trail-path{min-width:0;max-width:540px;width:100%;margin:0 auto}
:is(.public-science,.science-course) .science-trail-stops{position:relative;isolation:isolate}
:is(.public-science,.science-course) .science-trail-connector{position:absolute;inset:0;width:100%;height:100%;z-index:0;overflow:visible;fill:none;stroke-width:3;stroke-linecap:round;stroke-linejoin:round;pointer-events:none}
:is(.public-science,.science-course) .science-progress-tone{--science-progress-color:var(--science-pending)}
:is(.public-science,.science-course) .science-progress-tone[data-state="complete"]{--science-progress-color:var(--science-complete)}
:is(.public-science,.science-course) .science-progress-tone[data-state="progress"]{--science-progress-color:var(--science-in-progress)}
/* Progress belongs to the rings; the connecting path stays the unfilled color. */
:is(.public-science,.science-course) .science-trail-connection-track,:is(.public-science,.science-course) .science-trail-connection-fill,:is(.public-science,.science-course) .science-leaf-track{stroke:var(--science-pending)}
:is(.public-science,.science-course) .science-leaf-fill{stroke:var(--science-progress-color)}
:is(.public-science,.science-course) .science-trail-connection-fill{stroke-linecap:butt}
:is(.public-science,.science-course) .science-trail-path ol{position:relative;z-index:1;list-style:none;margin:0;padding:0}
:is(.public-science,.science-course) .science-trail-stop{position:relative;margin:0 0 48px;padding:0}
:is(.public-science,.science-course) .science-trail-stop:last-child{margin-bottom:0}
:is(.public-science,.science-course) .science-trail-leaf{display:flex;align-items:center;gap:24px;padding:14px 22px;min-height:158px;text-decoration:none;color:inherit;border-radius:28px;background:transparent;position:relative}
:is(.public-science,.science-course) .science-trail-stop:nth-child(even) .science-trail-leaf{flex-direction:row-reverse}
:is(.public-science,.science-course) .science-trail-stop.is-current .science-trail-label{background:#faf0d9;border-radius:18px;padding:12px;margin:-12px;box-shadow:0 7px 22px #24442a08}
:is(.public-science,.science-course) .science-trail-label{display:flex;flex:1;flex-direction:column;align-items:flex-start;gap:6px;min-width:0}
:is(.public-science,.science-course) .science-trail-label small{font-size:.7rem;font-weight:800;letter-spacing:.1em;color:var(--trail-muted)}
:is(.public-science,.science-course) .science-trail-stop.is-current .science-trail-label small{color:#865812}
:is(.public-science,.science-course) .science-trail-stop.is-current .science-trail-label small:before{content:'';display:inline-block;vertical-align:middle;width:6px;height:6px;border-radius:50%;background:var(--science-in-progress);margin-right:6px}
:is(.public-science,.science-course) .science-trail-label strong{font-size:1.15rem;line-height:1.2;letter-spacing:-.02em;font-weight:800;overflow-wrap:break-word}
:is(.public-science,.science-course) .science-trail-label>span{font-size:.78rem;line-height:1.5;color:var(--trail-muted)}
:is(.public-science,.science-course) .science-trail-stop.is-done .science-trail-label>span{color:var(--trail-green)}
:is(.public-science,.science-course) .science-leaf-node{position:relative;display:grid;place-items:center;width:128px;height:128px;flex:0 0 128px;isolation:isolate}
:is(.public-science,.science-course) .science-leaf-ring{position:absolute;inset:0;display:block;width:100%;height:100%;overflow:visible;fill:none;stroke-width:4;pointer-events:none;z-index:1}
:is(.public-science,.science-course) .science-leaf-art{width:76px;height:76px;display:grid;place-items:center;overflow:hidden;isolation:isolate;border-radius:50% 7% 50% 50%;background:#e4eccd;transform:rotate(-10deg)}
:is(.public-science,.science-course) .science-leaf-art img{display:block;width:72px;height:72px;max-width:100%;object-fit:contain;transform:rotate(10deg);filter:drop-shadow(0 3px 3px #33502a14)}
/* First-grade artwork fills the leaf; progress follows that same silhouette. */
.science-course[data-science-grade="1"] :is(.science-vocab-illustration,.science-question-picture,.science-question-picture img){background:transparent}

:is(.public-science,.science-course) .science-leaf-node[data-shape="leaf"] .science-leaf-surface{fill:#e4eccd;stroke:none}
:is(.public-science,.science-course) .science-leaf-node[data-shape="leaf"] :is(.science-leaf-track,.science-leaf-fill){stroke-linecap:round}
:is(.public-science,.science-course) .science-leaf-node[data-shape="leaf"] .science-leaf-art{width:calc(93.75% - 8px);height:calc(93.75% - 8px);padding:7%;box-sizing:border-box;background:transparent;transform:none;position:relative;z-index:2}
:is(.public-science,.science-course) .science-leaf-node[data-shape="leaf"] .science-leaf-art img{width:100%;height:100%;transform:none;object-fit:contain}
:is(.public-science,.science-course) .science-trail-final{display:flex;align-items:center;gap:14px;margin:25px 22px 8px;padding:17px 0;border-top:1px solid var(--trail-track);text-decoration:none;color:var(--trail-ink)}
:is(.public-science,.science-course) .science-trail-final>span{display:flex;flex:1;flex-direction:column;gap:4px}
:is(.public-science,.science-course) .science-trail-final strong{font-size:1rem}
:is(.public-science,.science-course) .science-trail-final small{font-size:.8rem;color:var(--trail-muted)}
:is(.public-science,.science-course) .science-trail-sidebar{position:sticky;top:20px;min-width:0;padding-top:12px}
:is(.public-science,.science-course) .science-trail-resume{padding:27px 24px 22px;border-radius:25px;background:#edf2df}
:is(.public-science,.science-course) .science-trail-resume .science-eyebrow{font-size:.7rem;letter-spacing:.08em;line-height:1.5}
:is(.public-science,.science-course) .science-trail-resume h2{font-size:1.6rem;letter-spacing:-.04em;line-height:1.16;margin:12px 0}
:is(.public-science,.science-course) .science-trail-resume p{font-size:.9rem;line-height:1.5;margin:0 0 18px;color:var(--trail-muted)}
:is(.public-science,.science-course) .science-trail-resume .primary-button{display:flex;justify-content:center;align-items:center;gap:14px;min-height:54px;width:100%;border-radius:17px;background:var(--trail-green);color:#fffef8;box-shadow:0 3px 0 #1e4830;font-size:1.05rem;font-weight:800}
:is(.public-science,.science-course) .science-trail-resume>small{display:flex;justify-content:center;align-items:center;gap:5px;font-size:.73rem;color:var(--trail-muted);margin-top:14px}
:is(.public-science,.science-course) .science-trail-resume>small .ui-icon{width:14px;height:14px}
:is(.public-science,.science-course) .science-trail-seeds{display:flex;justify-content:center;align-items:center;gap:6px;font-size:.82rem;color:var(--trail-muted);padding:19px 10px}
:is(.public-science,.science-course) .science-trail-seeds .ui-icon{color:var(--trail-green);width:18px;height:18px}
:is(.public-science,.science-course) .science-trail-nav{display:grid;gap:4px;margin:0 0 20px;padding:8px;border:1px solid var(--trail-track);border-radius:22px;background:var(--trail-paper)}
:is(.public-science,.science-course) .science-trail-nav>:is(a,.science-nav-locked){display:flex;align-items:center;gap:14px;min-width:0;min-height:56px;padding:10px 16px;border-radius:14px;text-decoration:none;color:var(--trail-muted);font-size:1rem;font-weight:700}
:is(.public-science,.science-course) .science-trail-nav a[aria-current]{color:var(--trail-green);background:#edf2df;font-weight:800}
:is(.public-science,.science-course) .science-trail-nav a:hover{background:#f0f4e8;color:var(--trail-green)}
:is(.public-science,.science-course) .science-trail-nav .ui-icon{width:30px;height:30px;flex:none;object-fit:contain}
:is(.public-science,.science-course) .science-trail-leaf:focus-visible,:is(.public-science,.science-course) .science-trail-nav a:focus-visible,:is(.public-science,.science-course) .science-trail-final:focus-visible{outline:3px solid #285e40;outline-offset:4px}
:is(.public-science,.science-course) .science-block-page{max-width:650px;margin:0 auto}
:is(.public-science,.science-course) .science-block-page .science-block-heading{display:flex;align-items:center;gap:22px;margin:20px 0 22px}
:is(.public-science,.science-course) .science-block-page .science-block-heading h1{font-size:clamp(1.65rem,4vw,2.4rem);line-height:1.14;letter-spacing:-.035em}
:is(.public-science,.science-course) .science-block-page .science-next-step{background:#edf2df;border:0;border-radius:24px;box-shadow:none}
:is(.public-science,.science-course) .science-block-page .science-route{display:flex;flex-direction:column;gap:10px}
:is(.public-science,.science-course) .science-block-page .science-route-row{border-radius:20px;min-height:82px}
@media(max-width:760px){
  .public-science:has(.science-learning-trail) #science-content{padding:0 14px;max-width:480px;min-height:0}
  .public-science:has(.science-learning-trail) .public-science-header{max-width:480px;padding:15px 23px 8px}
  .public-science:has(.science-learning-trail) .public-science-header>a{font-size:1rem;gap:9px}
  .public-science:has(.science-learning-trail) .public-science-header img{width:36px;height:36px}
  .public-science:has(.science-learning-trail) .public-science-header small{font-size:.7rem}
  .public-science:has(.science-learning-trail) .public-science-footer{padding-bottom:224px}
  :is(.public-science,.science-course) .science-learning-trail{padding-bottom:8px}
  :is(.public-science,.science-course) .science-trail-intro{padding:20px 12px 23px}
  :is(.public-science,.science-course) .science-trail-intro h1{font-size:2.05rem;max-width:330px;line-height:1.07;margin-top:9px}
  :is(.public-science,.science-course) .science-trail-intro p{font-size:.73rem}
  :is(.public-science,.science-course) .science-trail-intro p>span{white-space:nowrap}
  :is(.public-science,.science-course) .science-trail-layout{display:block}
  :is(.public-science,.science-course) .science-trail-leaf{gap:16px;padding:11px 12px;min-height:146px;border-radius:24px}
  :is(.public-science,.science-course) .science-trail-label strong{font-size:1.06rem}
  :is(.public-science,.science-course) .science-trail-label>span{font-size:.73rem}
  :is(.public-science,.science-course) .science-trail-stop{margin-bottom:42px}
  :is(.public-science,.science-course) .science-trail-stop:last-child{margin-bottom:0}
  :is(.public-science,.science-course) .science-trail-sidebar{position:static;padding:0}
  :is(.public-science,.science-course) .science-trail-resume{position:fixed;z-index:20;bottom:calc(var(--science-mobile-nav-height) + env(safe-area-inset-bottom,0px));left:0;right:0;padding:12px max(20px,calc((100vw - 420px)/2)) 15px;border-radius:20px 20px 0 0;background:#fffef8;box-shadow:0 -8px 25px #27432b0c}
  :is(.public-science,.science-course) .science-trail-resume .science-eyebrow,:is(.public-science,.science-course) .science-trail-resume h2,:is(.public-science,.science-course) .science-trail-resume>small{display:none}
  :is(.public-science,.science-course) .science-trail-resume p{font-size:.76rem;text-align:center;margin:0 0 8px}
  :is(.public-science,.science-course) .science-trail-resume .primary-button{min-height:52px}
  :is(.public-science,.science-course) .science-trail-nav{position:fixed;z-index:21;bottom:0;left:0;right:0;display:flex;background:#fffef8;margin:0;gap:4px;justify-content:space-around;padding:6px max(12px,calc((100vw - 420px)/2)) calc(8px + env(safe-area-inset-bottom,0px));height:calc(var(--science-mobile-nav-height) + env(safe-area-inset-bottom,0px));border:0;border-top:1px solid #e4e9d9;border-radius:0}
  :is(.public-science,.science-course) .science-trail-nav>:is(a,.science-nav-locked){flex-direction:column;justify-content:center;gap:4px;padding:6px 10px;font-size:.875rem;line-height:1.2;min-height:70px;flex:1}
  :is(.public-science,.science-course) .science-trail-nav .ui-icon{width:36px;height:36px}
  :is(.public-science,.science-course) .science-trail-final{margin:18px 12px 0}
  :is(.public-science,.science-course) .science-block-page .science-block-heading{gap:12px}
}
@media(max-width:360px){
  :is(.public-science,.science-course) .science-trail-leaf{padding:10px 7px;gap:11px}
  :is(.public-science,.science-course) .science-leaf-node{width:116px;height:116px;flex-basis:116px}
  :is(.public-science,.science-course) .science-leaf-art{width:66px;height:66px}
  :is(.public-science,.science-course) .science-leaf-art img{width:64px;height:64px}
  :is(.public-science,.science-course) .science-trail-label strong{font-size:1rem}
  :is(.public-science,.science-course) .science-trail-label small{font-size:.69rem}
  :is(.public-science,.science-course) .science-block-page .science-block-heading{flex-direction:column;text-align:center}
}

/* The same unit navigation follows learners into every lesson. */
:is(.public-science,.science-course) .science-study-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;align-items:start;gap:40px;max-width:1000px;margin:0 auto;padding:12px 0 32px}
:is(.public-science,.science-course) .science-study-main{min-width:0}
:is(.public-science,.science-course) .science-study-main>.view-wrap{width:100%;max-width:none;margin:0;padding:0}
:is(.public-science,.science-course) .science-study-main .back-row{display:none}
:is(.public-science,.science-course) .science-study-breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px 12px;min-height:44px;margin-bottom:18px;font-size:.85rem;line-height:1.4;color:var(--trail-muted)}
:is(.public-science,.science-course) .science-study-breadcrumb a{display:inline-flex;align-items:center;gap:7px;min-height:44px;color:var(--trail-ink);font-weight:700;text-decoration:none}
:is(.public-science,.science-course) .science-study-breadcrumb a:hover{text-decoration:underline;text-underline-offset:4px}
:is(.public-science,.science-course) .science-study-breadcrumb .ui-icon{width:18px;height:18px}
:is(.public-science,.science-course) .science-stage-nav{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;margin:0 0 24px;padding:12px 5px;border-block:1px solid var(--trail-track)}
:is(.public-science,.science-course) .science-stage-nav>a,:is(.public-science,.science-course) .science-stage-nav>span{position:relative;display:flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:5px 4px;border-radius:14px;color:var(--trail-muted);font-size:.82rem;font-weight:750;text-decoration:none}
:is(.public-science,.science-course) .science-stage-dot{display:grid;place-items:center;flex:none;width:30px;height:30px;border:2px solid var(--science-pending);border-radius:50%;font-size:.8rem;background:var(--trail-paper)}
:is(.public-science,.science-course) .science-stage-nav [data-state="complete"]{color:var(--science-complete)}
:is(.public-science,.science-course) .science-stage-nav [data-state="complete"] .science-stage-dot{background:var(--science-complete);border-color:var(--science-complete);color:white}
:is(.public-science,.science-course) .science-stage-nav [aria-current="step"]{background:#fbf1d9;color:#7d5313}
:is(.public-science,.science-course) .science-stage-nav [aria-current="step"] .science-stage-dot{border-color:var(--science-in-progress);box-shadow:0 0 0 3px #ad721816}
:is(.public-science,.science-course) .science-stage-nav [aria-current="step"][data-state="complete"]{background:#edf2df;color:var(--science-complete)}
:is(.public-science,.science-course) .science-stage-nav [aria-current="step"][data-state="complete"] .science-stage-dot{border-color:var(--science-complete);box-shadow:0 0 0 3px #285e4014}
:is(.public-science,.science-course) .science-stage-nav [aria-disabled]{color:#849080}
:is(.public-science,.science-course) .science-stage-nav a:hover{background:#edf2df}
:is(.public-science,.science-course) .science-study-sidebar{position:sticky;top:22px;padding-top:6px}
:is(.public-science,.science-course) .science-study-context{display:flex;align-items:center;flex-direction:column;text-align:center;padding:20px 15px 24px;background:#edf2df;border-radius:24px}
:is(.public-science,.science-course) .science-study-context .science-eyebrow{font-size:.68rem;letter-spacing:.1em;margin:14px 0 8px}
:is(.public-science,.science-course) .science-study-context>strong{font-size:1.35rem;line-height:1.2;max-width:220px}
:is(.public-science,.science-course) .science-study-context p{font-size:.8rem;color:var(--trail-muted);margin:12px 0 18px}
:is(.public-science,.science-course) .science-study-context>a{display:flex;align-items:center;gap:7px;font-size:.82rem;font-weight:750;color:var(--trail-green);text-decoration:none}
:is(.public-science,.science-course) .science-study-context>a .ui-icon{width:17px;height:17px}
:is(.public-science,.science-course) .science-study-layout a:focus-visible{outline:3px solid var(--trail-green);outline-offset:4px}
:is(.public-science,.science-course) .science-study-main .science-block-heading>.science-leaf-node{display:none}
body.public-science:has(.science-study-layout .science-theory-page){display:block;height:auto;overflow:visible}
.public-science:has(.science-study-layout .science-theory-page) #science-content{height:auto;max-width:1148px;overflow:visible;padding:12px 24px}
:is(.public-science,.science-course) .science-study-main .science-theory-page{display:flex;flex-direction:column;height:auto;gap:18px}
:is(.public-science,.science-course) .science-study-main .science-theory-card{max-height:none;overflow:visible}
:is(.public-science,.science-course) .science-study-main .science-lesson-header{display:flex;align-items:center;gap:14px}
:is(.public-science,.science-course) .science-study-main .science-lesson-header>.science-progress{flex:1}
:is(.public-science,.science-course) .science-study-main .science-theory-actions{padding-bottom:12px}
@media(max-width:760px){
 :is(.public-science,.science-course) .science-study-layout{display:block;max-width:480px;padding:0 0 calc(var(--science-mobile-nav-height) + env(safe-area-inset-bottom,0px) + 24px)}
 :is(.public-science,.science-course) .science-study-sidebar{position:static;padding:0}
 :is(.public-science,.science-course) .science-study-context{display:none}
 :is(.public-science,.science-course) .science-study-breadcrumb{gap:4px 8px;margin-bottom:6px;font-size:.76rem}
 :is(.public-science,.science-course) .science-stage-nav{gap:3px;padding:7px 0;margin-bottom:18px}
 :is(.public-science,.science-course) .science-stage-nav>a,:is(.public-science,.science-course) .science-stage-nav>span{flex-direction:column;gap:5px;min-height:60px;font-size:.69rem;padding:5px 2px}
 :is(.public-science,.science-course) .science-stage-dot{width:29px;height:29px}
 :is(.public-science,.science-course) .science-study-layout .science-trail-nav{position:fixed}
 :is(.public-science,.science-course) .science-study-main>.science-vocab-visual{padding-bottom:185px}
 :is(.public-science,.science-course) .science-study-main .science-vocab-dock{position:fixed;bottom:calc(var(--science-mobile-nav-height) + env(safe-area-inset-bottom,0px));left:0;right:0;z-index:20;margin:0;padding:8px max(18px,calc((100vw - 430px)/2)) 12px;background:#fffef8;border-top:1px solid var(--trail-track);box-shadow:0 -8px 25px #27432b08}
 :is(.public-science,.science-course) .science-study-main .science-vocab-card-nav{margin:0 0 7px}
 :is(.public-science,.science-course) .science-study-main .science-vocab-card-nav button{min-width:52px;min-height:44px}
 :is(.public-science,.science-course) .science-study-main .science-vocab-seen{font-size:.75rem;margin:0 0 7px}
 :is(.public-science,.science-course) .science-study-main .science-vocab-dock .primary-button{min-height:48px}
 :is(.public-science,.science-course) .science-study-main .science-vocab-dock .science-vocab-response{font-size:.83rem}
 :is(.public-science,.science-course) .science-study-main .science-theory-page{padding-bottom:80px}
 :is(.public-science,.science-course) .science-study-main .science-theory-actions{position:fixed;z-index:20;left:0;right:0;bottom:calc(var(--science-mobile-nav-height) + env(safe-area-inset-bottom,0px));padding:12px max(18px,calc((100vw - 430px)/2));background:#fffef8;border-top:1px solid var(--trail-track);box-shadow:0 -8px 25px #27432b08}
 .public-science:has(.science-study-layout .science-theory-page) #science-content{padding:8px 14px}
 :is(.public-science,.science-course) .science-study-main .science-flash-word{padding:60px 14px 18px}
 :is(.public-science,.science-course) .science-study-main .science-vocab-visual header{margin:8px 0 16px}
 :is(.public-science,.science-course) .science-study-main .science-vocab-visual header p{font-size:.83rem}
 :is(.public-science,.science-course) .science-study-main .science-vocab-visual h1{font-size:1.6rem}
 .public-science:has(.science-study-layout) .public-science-footer{padding-bottom:calc(var(--science-mobile-nav-height) + env(safe-area-inset-bottom,0px) + 20px)}
}

/* The public design is the reference. Only the signed-in app shell differs. */
.science-course{min-height:0;width:100%;max-width:1148px;margin:0 auto;padding:12px 24px}
.app:has(.content>.science-course){grid-template-rows:auto minmax(0,1fr) auto}
.app:has(.content>.science-course)>.app-footer{display:block!important;position:relative;z-index:30}
.app:has(.content>.science-course)>.content{background:var(--paper,#fffef8);scrollbar-gutter:auto}
.science-course .science-nav-locked,.science-course .science-trail-leaf[aria-disabled]{opacity:.65;cursor:default}
.science-course .science-trail-final[aria-disabled]{color:var(--trail-muted)}
.science-course .science-trail-exam{display:flex;align-items:center;gap:10px;padding:14px 8px;font-size:.85rem;color:var(--trail-ink)}
.science-course .science-trail-exam small{display:block;margin-top:4px;color:var(--trail-muted)}
.science-exam-pager{display:none}
@media(max-width:760px){
 .science-course:has(.science-learning-trail){max-width:480px;padding:0 14px 224px}
 .science-course:has(.science-study-layout){padding-bottom:calc(var(--science-mobile-nav-height) + env(safe-area-inset-bottom,0px) + 20px)}
 .science-course:has(.science-theory-page){padding:8px 14px calc(var(--science-mobile-nav-height) + env(safe-area-inset-bottom,0px) + 20px)}
}
@media(max-width:600px){.science-course{padding:8px 14px}}
.student-preview-body .science-trail-nav{position:sticky;inset:auto;bottom:0;width:100%}
.student-preview-body .science-trail-resume{position:static}

/* Finished vocabulary opens as a browsable deck, with a separate way to resume. */
:is(.public-science,.science-course) .science-vocab-review .science-vocab-card-nav{display:grid;grid-template-columns:52px minmax(0,1fr) 52px;gap:8px;max-width:430px;margin:0 auto 7px}
:is(.public-science,.science-course) .science-vocab-review select{width:100%;min-width:0;min-height:44px;margin:0;padding:7px 10px;font:inherit;font-size:.9rem;color:var(--trail-ink);background:var(--trail-paper);border:1px solid var(--trail-track);border-radius:12px}
:is(.public-science,.science-course) .science-vocab-review-actions{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.2fr);gap:8px}
:is(.public-science,.science-course) .science-vocab-review-actions>a{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;min-width:0;min-height:52px;padding:7px 10px;font-size:.9rem;line-height:1.2;text-align:center;white-space:normal;text-decoration:none}
:is(.public-science,.science-course) .science-vocab-review-actions a>span{display:flex;flex-direction:column;gap:3px}
:is(.public-science,.science-course) .science-vocab-review-actions small{font-size:.7rem;font-weight:500}

/* Unit tools belong to the lesson; the app keeps its usual header and footer. */
:is(.public-science,.science-course) .science-unit-tools{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:45px;align-items:stretch;margin:0 0 24px}
:is(.public-science,.science-course) .science-unit-tools .science-trail-nav{grid-template-columns:repeat(3,minmax(0,1fr));margin:0;gap:4px}
:is(.public-science,.science-course) .science-unit-tools .science-trail-nav>:is(a,.science-nav-locked){flex-direction:column;justify-content:center;padding:8px;gap:6px}
:is(.public-science,.science-course) .science-trail-seeds{justify-content:flex-start;gap:16px;padding:16px 20px;border:1px solid #ccdbb7;border-radius:22px;background:#edf2df;color:#214b3a;text-align:left}
:is(.public-science,.science-course) .science-trail-seeds>.ui-icon{width:44px;height:44px;flex:none}
:is(.public-science,.science-course) .science-trail-seeds strong{display:block;font-size:1.9rem;line-height:1.1;letter-spacing:-.04em}
:is(.public-science,.science-course) .science-trail-seeds strong span{font-size:1rem;letter-spacing:0;font-weight:750}
:is(.public-science,.science-course) .science-trail-seeds p{margin:5px 0 0;font-size:.82rem;line-height:1.3;color:#49633f}
:is(.public-science,.science-course) .science-trail-sidebar .science-game-card{grid-template-columns:minmax(0,1fr);margin:20px 0 0}
:is(.public-science,.science-course) .science-trail-sidebar .science-game-art{height:190px;min-height:0}
:is(.public-science,.science-course) .science-trail-sidebar .science-game-copy{padding:20px}
:is(.public-science,.science-course) .science-trail-sidebar .science-game-copy h2{font-size:1.35rem}
:is(.public-science,.science-course) .science-trail-sidebar .science-game-copy p{font-size:.9rem}
:is(.public-science,.science-course) .science-trail-sidebar .science-game-copy .primary-button{width:100%}
@media(max-width:760px){
 :is(.public-science,.science-course) .science-unit-tools{grid-template-columns:minmax(0,1fr);gap:12px;margin-bottom:20px}
 :is(.public-science,.science-course) .science-trail-seeds{padding:14px 18px;border-radius:18px}
 .science-course:has(.science-learning-trail){padding-bottom:120px}
 .science-course .science-trail-nav,.science-course .science-study-layout .science-trail-nav{position:static;inset:auto;width:100%;height:auto;min-height:0;margin:0 0 12px;padding:5px;border:1px solid var(--trail-track);border-radius:18px;box-shadow:none}
 .science-course .science-trail-nav>:is(a,.science-nav-locked){min-height:68px;padding:5px;gap:4px}
 .science-course .science-trail-resume{bottom:var(--science-shell-bottom,80px)}
 .science-course .science-study-layout{display:flex;flex-direction:column;gap:0;padding-bottom:16px}
 .science-course .science-study-sidebar{order:-1;width:100%}
 .science-course .science-study-main{width:100%}
 .science-course:has(.science-study-layout),.science-course:has(.science-theory-page){padding-bottom:16px}
 .science-course .science-study-main .science-vocab-dock,.science-course .science-study-main .science-theory-actions,.science-course .science-contest-play .science-contest-dock:has(button:not([hidden])){bottom:var(--science-shell-bottom,80px)}
 .science-course .science-study-main .science-contest-dock{z-index:20}
}

/* Use the available app viewport for reading; keep the same lesson artwork. */
@media(min-height:700px) and (max-width:760px){
 .science-course:has(.science-vocab-discover),.science-course:has(.science-theory-page){height:100%;padding:8px 14px}
 .science-course:has(.science-vocab-discover) .science-study-layout,.science-course:has(.science-theory-page) .science-study-layout{height:100%;min-height:0;padding:0}
 .science-course:has(.science-vocab-discover) .science-study-main,.science-course:has(.science-theory-page) .science-study-main{display:flex;flex:1;flex-direction:column;min-height:0}
 .science-course:has(.science-vocab-discover) .science-study-breadcrumb,.science-course:has(.science-theory-page) .science-study-breadcrumb{flex:none;min-height:32px;margin-bottom:4px}
 .science-course:has(.science-vocab-discover) .science-study-breadcrumb a,.science-course:has(.science-theory-page) .science-study-breadcrumb a{min-height:32px}
 .science-course:has(.science-vocab-discover) .science-stage-nav,.science-course:has(.science-theory-page) .science-stage-nav{flex:none;margin-bottom:8px;padding:4px 0}
 .science-course:has(.science-vocab-discover) .science-stage-nav>:is(a,span),.science-course:has(.science-theory-page) .science-stage-nav>:is(a,span){min-height:50px;padding:2px;gap:3px}
 .science-course .science-study-main>.science-vocab-discover,.science-course .science-study-main>.science-theory-page{display:flex;flex:1;flex-direction:column;min-height:0;padding:0;gap:8px}
 .science-course .science-study-main .science-vocab-discover header{flex:none;margin:0}
 .science-course .science-vocab-discover header .science-eyebrow{display:none}
 .science-course .science-study-main .science-vocab-discover h1{margin:0 0 3px}
 .science-course .science-vocab-discover header p{margin:0}
 .science-course .science-study-main .science-vocab-discover .science-flash-word{flex:1;min-height:0;padding:12px 48px;gap:6px;overflow:hidden}
 .science-course .science-vocab-discover .science-flash-word>strong{font-size:clamp(1.5rem,6vw,2rem)}
 .science-course .science-vocab-discover .science-flash-word>span{font-size:1rem}
 .science-course .science-vocab-discover .science-vocab-illustration{flex:1;min-height:0;height:0;max-height:210px;width:100%;margin:0}
 .science-course .science-study-main .science-vocab-discover .science-vocab-dock{position:static;flex:none;margin:0;padding:0;background:transparent;border:0;box-shadow:none}
 .science-course .science-study-main .science-theory-card{display:flex;flex:1;flex-direction:column;min-height:0;max-height:none;padding:14px;overflow:hidden}
 .science-course .science-theory-card h1{flex:none;font-size:1.4rem;margin-bottom:8px}
 .science-course .science-theory-card .science-lesson-media{flex:0 1 42%;min-height:0}
 .science-course .science-theory-card .science-lesson-media figure{height:100%}
 .science-course .science-theory-card .science-lesson-media figure:has(figcaption):not([hidden]){display:grid;grid-template-rows:minmax(0,1fr) auto}
 .science-course .science-theory-card .science-theory-image{height:100%;max-height:100%;width:100%;object-fit:contain}
 .science-course .science-theory-card .science-theory-reading{flex:1;min-height:50px;overflow:hidden}
 .science-course .science-theory-card .science-theory-copy{margin-top:10px;font-size:1rem;line-height:1.4}
 .science-course .science-study-main .science-theory-actions{position:static;flex:none;padding:0;border:0;box-shadow:none}
}

/* The app footer owns navigation; no extra Aprender / Repasar / Jugar bar. */
body.public-science,.science-course{--science-mobile-nav-height:0px}
:is(.public-science,.science-course) .science-unit-tools{display:block}
:is(.public-science,.science-course) .science-trail-seeds>div{flex:1;min-width:0}
:is(.public-science,.science-course) .science-unit-review{flex:none;min-height:44px;padding:10px 14px;font-size:.9rem;text-decoration:none}
@media(max-width:760px){
 .public-science:has(.science-learning-trail) .public-science-footer{padding-bottom:128px}
}
@media(max-width:360px){
 :is(.public-science,.science-course) .science-trail-seeds{gap:10px;padding:12px}
 :is(.public-science,.science-course) .science-trail-seeds>.ui-icon{width:32px;height:32px}
 :is(.public-science,.science-course) .science-trail-seeds strong{font-size:1.5rem}
 :is(.public-science,.science-course) .science-trail-seeds strong span{font-size:.85rem}
 :is(.public-science,.science-course) .science-unit-review{padding:8px;font-size:.85rem}
}

/* Three compact indicators replace the scattered unit metadata. */
.science-seed-icon{display:inline-block;width:26px;height:26px;object-fit:contain;vertical-align:middle;flex:none}
:is(.public-science,.science-course) .science-trail-intro{max-width:none;padding:12px 0 20px}
:is(.public-science,.science-course) .science-trail-intro h1{max-width:650px;margin:8px 0 0;font-size:clamp(1.9rem,4vw,2.7rem);line-height:1.12}
/* One calm summary strip: small symbols, clear values, gentle dividers. */
:is(.public-science,.science-course) .science-unit-indicators{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;margin-bottom:28px;padding:6px;border:1px solid #e2e8dc;border-radius:20px;background:#fffef9}
:is(.public-science,.science-course) .science-unit-indicator{display:grid;grid-template-columns:minmax(0,1fr);grid-template-rows:auto auto auto;align-content:center;align-items:center;gap:7px 7px;min-width:0;margin:0;padding:14px 18px;border:0;border-radius:0;background:transparent;color:var(--trail-ink);text-decoration:none;text-align:left}
:is(.public-science,.science-course) .science-unit-indicator>.ui-icon,:is(.public-science,.science-course) .science-unit-indicator>.science-seed-icon,:is(.public-science,.science-course) .science-unit-indicator>svg{display:none}
:is(.public-science,.science-course) .science-unit-indicator>.science-indicator-label{grid-column:1;grid-row:1;font-size:.78rem;line-height:1.2;font-weight:650;color:#64735e}
:is(.public-science,.science-course) .science-unit-indicator>strong{grid-column:1/-1;grid-row:2;font-size:1.75rem;line-height:1.05;font-weight:800;letter-spacing:-.04em}
:is(.public-science,.science-course) .science-unit-indicator>small{grid-column:1/-1;grid-row:3;margin:0;font-size:.7rem;color:#71806a;line-height:1.25}
:is(.public-science,.science-course) .science-trail-seeds>small{visibility:visible}
:is(.public-science,.science-course) .science-unit-progress svg{fill:none;stroke-width:4}
.science-summary-track{stroke:#dde6d5}.science-summary-fill{stroke:#285e40;stroke-linecap:round}
:is(.public-science,.science-course) .science-unit-exam{background:#fcf6e7;border-radius:14px}
:is(.public-science,.science-course) .science-unit-exam>strong{color:#795923}
:is(.public-science,.science-course) a.science-unit-exam:hover{background:#f7edcf}
:is(.public-science,.science-course) a.science-unit-exam:focus-visible{outline:3px solid #285e40;outline-offset:2px}
:is(.public-science,.science-course) .science-trail-actions{display:grid;gap:10px}
:is(.public-science,.science-course) .science-trail-actions.has-review{grid-template-columns:minmax(0,1fr) minmax(0,1.25fr)}
:is(.public-science,.science-course) .science-trail-actions>a{display:flex;align-items:center;justify-content:center;min-width:0;min-height:56px;width:100%;padding:10px;font-size:.94rem;line-height:1.2;text-align:center;white-space:normal;text-decoration:none;border-radius:15px;gap:6px}
:is(.public-science,.science-course) .science-trail-actions .science-unit-review{flex-direction:column;background:#f0f5e8;border:1px solid #c9d8b9;color:#285e40}
:is(.public-science,.science-course) .science-trail-actions .science-unit-review small{font-size:.68rem;color:#59705d}
:is(.public-science,.science-course) .science-trail-actions.has-review .primary-button{font-size:.9rem}
@media(max-width:760px){
 :is(.public-science,.science-course) .science-trail-intro{padding:14px 0 18px}
 :is(.public-science,.science-course) .science-trail-intro h1{font-size:1.85rem;max-width:350px}
 :is(.public-science,.science-course) .science-unit-indicators{padding:5px;border-radius:18px;margin-bottom:22px}
 :is(.public-science,.science-course) .science-unit-indicator{display:grid;grid-template-columns:minmax(0,1fr);justify-content:normal;gap:7px 5px;padding:12px 10px;text-align:left}
 :is(.public-science,.science-course) .science-unit-indicator>.ui-icon,:is(.public-science,.science-course) .science-unit-indicator>.science-seed-icon,:is(.public-science,.science-course) .science-unit-indicator>svg{display:none}
 :is(.public-science,.science-course) .science-unit-indicator>.science-indicator-label{font-size:.7rem}
 :is(.public-science,.science-course) .science-unit-indicator>strong{font-size:clamp(1.25rem,5.5vw,1.5rem);white-space:normal;overflow-wrap:anywhere}
 :is(.public-science,.science-course) .science-unit-indicator>small{font-size:.62rem}
 .science-course:has(.science-learning-trail){padding-bottom:170px}
 .public-science:has(.science-learning-trail) .public-science-footer{padding-bottom:180px}
 :is(.public-science,.science-course) .science-trail-actions.has-review .science-unit-review{font-size:.83rem}
}

/* Seed counters use the same compact symbol everywhere. */
:is(.public-science,.science-course) .science-seed-icon{width:24px;height:24px;object-fit:contain}