:root{--ink:#073e49;--teal:#008d95;--mint:#e7faf5;--green:#72bc35;--muted:#4c6d75;--line:#dcecea;font-family:Arial,'Segoe UI',sans-serif;color:var(--ink);background:#fff;font-synthesis:none}*{box-sizing:border-box}body{margin:0;min-height:100svh}a{color:inherit}button,input{font:inherit}button,a,input{touch-action:manipulation}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid #007983;outline-offset:5px}.shell{max-width:1280px;margin:auto;padding:0 5%}.top{min-height:116px;display:flex;align-items:center;justify-content:space-between;gap:24px;border-bottom:1px solid var(--line)}.brand{display:block;width:285px;max-width:65%;line-height:0}.brand img{display:block;width:100%;height:auto}.byline{text-align:right;font-size:14px;line-height:1.6;color:var(--muted)}.byline strong{display:block;color:var(--ink);font-size:16px}.hero{display:grid;grid-template-columns:1.15fr 1fr;align-items:center;gap:32px;min-height:620px;padding:45px 0 35px}.eyebrow{font-size:14px;font-weight:700;letter-spacing:.13em;text-transform:uppercase;color:#007e80;margin:0 0 25px}.hero h1{font-size:clamp(44px,5.6vw,76px);line-height:1.08;letter-spacing:-.045em;margin:0 0 25px;max-width:660px}.hero h1 span{color:var(--teal)}.intro{font-size:19px;line-height:1.7;max-width:400px;color:var(--muted)}.arabic{font-size:22px;font-weight:700;line-height:1.8;margin-top:28px;direction:rtl;text-align:left}.portrait{position:relative;align-self:stretch;min-height:510px;display:flex;align-items:flex-end;justify-content:center;isolation:isolate;overflow:hidden;border-radius:170px 170px 32px 32px;background:linear-gradient(150deg,#dffaf4,#b8ebe6 65%,#97ddd5)}.portrait:before{content:'';position:absolute;width:390px;height:390px;border:1px solid #ffffffb3;border-radius:50%;top:45px;z-index:-1}.portrait:after{content:'';position:absolute;width:270px;height:270px;border:1px solid #ffffff99;border-radius:50%;top:105px;z-index:-1}.portrait img{height:530px;max-width:100%;object-fit:contain;object-position:bottom;filter:drop-shadow(0 20px 22px #0b5e6020)}.strip{padding:26px 0 32px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;gap:24px}.strip strong{font-size:21px;letter-spacing:-.025em}.strip p{font-size:16px;color:var(--muted);margin:0;line-height:1.6}footer{display:flex;justify-content:space-between;gap:20px;align-items:center;padding:25px 0;font-size:14px;color:var(--muted)}footer a{text-decoration:none}footer a:hover{text-decoration:underline}.account-layout{max-width:480px;padding:48px 24px;margin:auto}.account-layout h1{font-size:32px;line-height:1.2;letter-spacing:-.025em}.account-layout p{color:var(--muted);line-height:1.7}.account-layout label{display:block;font-weight:700;margin:24px 0 9px}.account-layout input{width:100%;padding:15px;border:1px solid #abcac7;border-radius:12px;color:var(--ink);background:white;font-size:17px}.primary{display:block;width:100%;border:0;border-radius:12px;padding:16px 20px;margin-top:26px;color:white;background:#007f87;cursor:pointer;font-weight:700}.primary:hover{background:#006b73}.primary:disabled{opacity:.6;cursor:wait}.password-field{position:relative}.password-field input{padding-right:72px}.reveal{position:absolute;right:10px;top:11px;background:transparent;border:0;padding:6px;color:#00717b;cursor:pointer}.notice{min-height:24px;font-size:16px;color:#ac2525!important}.owner-label{padding:20px;border:1px solid var(--line);border-radius:14px;background:#f4fcf9}.owner-label strong{display:block;margin-top:8px;font-size:22px}.back{display:inline-block;margin-top:24px;color:#007b82}.auth-links{display:flex;justify-content:space-between;gap:20px;margin-top:24px}.auth-links a{font-size:14px}.quiet{border:0;background:transparent;color:#007b82;padding:0;cursor:pointer;text-decoration:underline;font-size:16px}@media(max-width:700px){.shell{padding:0 6%}.top{min-height:95px;gap:10px}.brand{width:220px;max-width:68%}.byline{font-size:12px}.byline strong{font-size:14px}.hero{grid-template-columns:1fr;gap:22px;padding:36px 0 25px}.hero h1{font-size:clamp(42px,10vw,62px)}.eyebrow{font-size:13px;margin-bottom:18px}.intro{font-size:18px}.arabic{font-size:20px;margin:16px 0 0}.portrait{min-height:340px;max-height:380px;border-radius:140px 140px 25px 25px}.portrait img{height:390px}.portrait:before{width:310px;height:310px;top:20px}.portrait:after{width:230px;height:230px;top:60px}.strip{align-items:flex-start;flex-direction:column;gap:10px}.strip strong{font-size:20px}footer{align-items:flex-start;font-size:13px;line-height:1.6}.account-layout{padding-top:24px}}@media(prefers-reduced-motion:no-preference){.hero{animation:arrive .55s ease-out}@keyframes arrive{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}}
[hidden]{display:none!important}.welcome-actions{margin-top:28px;display:flex;flex-direction:column;align-items:flex-start;gap:15px}.start-button{display:inline-flex;align-items:center;gap:18px;background:#007f87;color:#fff;text-decoration:none;border-radius:16px;padding:19px 24px;font-size:19px;font-weight:700;box-shadow:0 8px 0 #07555e,0 16px 24px #007f871c;transition:transform .15s,box-shadow .15s}.start-button span[lang]{font-size:17px;font-weight:400}.start-button:hover{background:#006c75;transform:translateY(-2px)}.start-button:active{transform:translateY(4px);box-shadow:0 4px 0 #07555e}.sound-toggle{border:1px solid #c4dcd9;border-radius:30px;padding:10px 14px;color:#315d63;background:white;cursor:pointer;font-size:14px}.sound-caption{font-size:14px;color:#4c6d75;line-height:1.6;max-width:420px}.hello-bubble{position:absolute;z-index:1;top:28px;left:50%;transform:translateX(-50%);background:#fff;border-radius:20px;padding:13px 20px;white-space:nowrap;box-shadow:0 6px 24px #00554f15;font-size:19px;font-weight:700}.portrait{padding-top:70px}.grades-view{min-height:640px;padding:20px 0 70px;max-width:800px;margin:auto}.grades-view .eyebrow{margin-top:50px}.grades-view h1{font-size:clamp(32px,5vw,52px);letter-spacing:-.035em;margin:0}.grades-ar{color:#4c6d75;text-align:left;font-size:20px}.grade-card{display:flex;align-items:center;gap:25px;border:1px solid #b9ddd4;border-radius:22px;padding:25px;margin-top:35px;width:100%;text-align:left;background:#eefbf7;color:#073e49;cursor:pointer}.grade-card:hover{border-color:#008d95;background:#e4f9f2}.grade-number{font-size:42px;border-radius:18px;background:#007f87;color:white;padding:15px 23px}.grade-card strong{font-size:24px;display:block}.grade-card small{display:block;font-size:16px;margin-top:10px;line-height:1.5}.grade-card>span:last-child{margin-left:auto;font-size:25px}.grade-details{padding:25px;border:1px solid #dcecea;border-radius:18px;margin-top:18px;line-height:1.7}.grade-details p[lang]{text-align:left}.begin-overlay{position:fixed;inset:0;z-index:10;display:grid;place-items:center;background:#063e49e8;color:white;padding:30px;backdrop-filter:blur(6px);text-align:center}.begin-overlay p{font-size:clamp(48px,9vw,85px);margin:0 0 22px;line-height:1.6}.begin-overlay span{font-size:22px}.begin-overlay button{display:block;margin:35px auto 0;padding:12px 20px;background:white;border:0;border-radius:12px;font-size:16px;color:#073e49;cursor:pointer}@media(prefers-reduced-motion:no-preference){.portrait img{transform-origin:50% 95%;animation:welcome-sway 2.4s ease-in-out 1}.hello-bubble{animation:bubble-in .65s ease-out}.welcome-actions{animation:arrive .8s ease-out}@keyframes welcome-sway{0%,100%{transform:rotate(0)}25%{transform:rotate(-3deg) translateY(-4px)}60%{transform:rotate(2deg)}80%{transform:rotate(-1deg)}}@keyframes bubble-in{from{opacity:0;translate:0 10px}to{opacity:1;translate:0 0}}}@media(max-width:700px){.hero{gap:28px}.portrait{padding-top:65px;min-height:370px}.hello-bubble{top:15px;font-size:17px}.start-button{font-size:17px;gap:12px;padding:17px 19px}.start-button span[lang]{font-size:16px}.grade-card{gap:14px;padding:18px}.grade-number{font-size:32px;padding:12px 18px}.grade-card strong{font-size:20px}.grade-card small{font-size:14px}}@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}
.mascot-button{display:flex;align-items:center;flex-direction:column;justify-content:flex-end;border:0;background:none;cursor:pointer;padding:0 0 18px;width:100%;color:#073e49}.mascot-button img{pointer-events:none}.listen-label{position:relative;margin-top:-20px;z-index:2;background:#fff;padding:12px 18px;border-radius:30px;box-shadow:0 5px 18px #063e4922;font-size:15px;font-weight:bold}.hello-bubble{text-align:center;white-space:normal;width:80%;max-width:310px;font-size:20px;line-height:1.35;top:18px}.welcome-actions{flex-direction:row;flex-wrap:wrap;max-width:480px}.start-button{flex-basis:100%;justify-content:center}.sound-toggle{font-size:13px}.motion-enabled .portrait img{animation:mascot-greeting 3.4s ease-in-out infinite!important;transform-origin:50% 95%}.motion-enabled .hello-bubble{animation:welcome-bubble 3.4s ease-in-out infinite!important}.motion-enabled .mascot-button.speaking img{animation:mascot-speaking .7s ease-in-out infinite!important}.motion-paused .portrait img,.motion-paused .hello-bubble{animation:none!important;transform:none!important}.hello-bubble.speaking{box-shadow:0 0 0 3px #008d95,0 6px 24px #00554f15}.begin-overlay p{font-size:clamp(30px,6.5vw,70px);max-width:1000px}.begin-overlay span{font-size:20px}@keyframes mascot-greeting{0%,100%{transform:translateY(0) rotate(-3deg)}50%{transform:translateY(-15px) rotate(3deg)}}@keyframes mascot-speaking{0%,100%{transform:translateY(-5px) rotate(-1.5deg)}50%{transform:translateY(-12px) rotate(1.5deg)}}@keyframes welcome-bubble{0%,100%{translate:0 0}50%{translate:0 -5px}}@media(max-width:700px){.portrait{max-height:440px;min-height:430px}.mascot-button img{height:380px}.hello-bubble{font-size:18px;top:15px}.listen-label{font-size:14px;margin-top:-18px}}
/* Keep the welcome inside normal document flow at every viewport width. */
.hero{grid-template-columns:minmax(0,1.15fr) minmax(0,1fr)}.hero>div{min-width:0}.portrait{display:flex;flex-direction:column;align-items:center;justify-content:flex-start;align-self:center;gap:12px;padding:24px 18px 18px;border-radius:36px;width:100%;min-width:0;min-height:0;max-height:none;overflow:hidden}.hello-bubble{position:relative;top:auto;left:auto;transform:none!important;translate:none!important;animation:none!important;width:100%;max-width:340px;margin:0 auto;box-sizing:border-box;text-align:center;white-space:normal;overflow-wrap:anywhere;font-size:clamp(18px,1.8vw,23px);line-height:1.4;padding:14px 12px;flex-shrink:0}.mascot-button{padding:0;min-width:0;width:100%;gap:12px}.portrait .mascot-button img{display:block;width:100%;max-width:100%;height:clamp(270px,48vh,470px);object-fit:contain;object-position:center;animation:none!important;transform:none!important;translate:none!important}.listen-label{margin:0;max-width:100%;text-align:center;line-height:1.5;white-space:normal;font-size:14px}.portrait:before,.portrait:after{max-width:85%;pointer-events:none}.hello-bubble.speaking{box-shadow:0 0 0 2px #008d95,0 6px 24px #00554f15}.begin-overlay p{margin-bottom:0}@media(max-width:850px){.hero{grid-template-columns:minmax(0,1fr)}.portrait{max-width:490px;margin:0 auto}.portrait .mascot-button img{height:clamp(280px,45vh,410px)}.hello-bubble{font-size:20px}}@media(min-width:851px) and (max-height:800px){.hero{min-height:0;padding-top:28px}.hero h1{font-size:clamp(38px,4.5vw,60px)}.portrait .mascot-button img{height:330px}}
/* Textbook catalogue: bilingual cards, responsive and keyboard accessible. */
[hidden]{display:none!important}.catalog-view{padding:28px 0 64px}.catalog-crumbs{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:35px;align-items:center;font-size:14px}.catalog-crumbs a{color:#176c72;text-decoration:none}.catalog-crumbs a:hover{text-decoration:underline}.catalog-view h1{font-size:clamp(28px,4vw,46px);line-height:1.18;max-width:920px;margin:10px 0 12px;letter-spacing:-1px;overflow-wrap:break-word}.catalog-ar{font-size:clamp(19px,2.4vw,25px);text-align:left;color:#37676f;margin:0 0 18px;line-height:1.65}.catalog-intro{color:#536f75;line-height:1.8;margin-bottom:28px}.learning-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}.learning-card{display:flex;flex-direction:column;border:1px solid #d7e9e7;border-radius:23px;overflow:hidden;background:#fff;text-decoration:none;color:#123c48;box-shadow:0 7px 22px #073e4908;transition:transform .18s,box-shadow .18s;min-width:0}.learning-card:hover{transform:translateY(-5px);box-shadow:0 15px 30px #073e4914}.learning-card:focus-visible{outline:3px solid #087f82;outline-offset:5px}.card-art{height:145px;position:relative;display:flex;align-items:center;justify-content:center;background:color-mix(in srgb,var(--card-color) 11%,white);color:var(--card-color)}.card-art>svg{width:74px;height:74px;stroke-width:1.4}.card-index{position:absolute;left:18px;top:15px;font-size:10px;font-weight:800;letter-spacing:1.8px}.card-copy{padding:22px;display:flex;flex-direction:column;flex:1}.card-copy h2{font-size:21px;line-height:1.3;margin:0 0 10px;letter-spacing:-.4px}.card-copy>p{font-size:17px;line-height:1.7;text-align:left;color:#577378;margin:0 0 24px}.card-bottom{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:8px;font-size:13px;color:var(--card-color);font-weight:700}.card-bottom>span:last-child{font-size:25px}.lesson-welcome{margin-top:30px;border:1px solid #d7e9e7;border-radius:24px;padding:36px;background:#fff;display:flex;gap:30px;align-items:center}.lesson-symbol{color:var(--card-color);padding:26px;background:color-mix(in srgb,var(--card-color) 10%,white);border-radius:24px}.lesson-symbol svg{width:85px;height:85px;stroke-width:1.4}.lesson-welcome h2{font-size:24px;margin:0 0 10px}.lesson-welcome p{line-height:1.8;color:#536f75}.lesson-welcome p[lang=ar]{text-align:left}.lesson-welcome .back{display:inline-block;margin-top:12px}@media(max-width:900px){.learning-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:570px){.learning-grid{grid-template-columns:1fr;gap:18px}.card-art{height:125px}.card-copy h2{font-size:22px}.catalog-view{padding-top:15px}.catalog-crumbs{margin-bottom:25px}.lesson-welcome{flex-direction:column;align-items:flex-start;padding:24px}.catalog-intro span{display:block}}@media(prefers-reduced-motion:reduce){.learning-card{transition:none}.learning-card:hover{transform:none}}
/* BioGenius lesson workspace, matching the approved colourful concept. */
.study-bar{display:flex;align-items:center;gap:14px;flex-wrap:wrap;background:#e1f6f3;border:1px solid #bce7df;border-radius:13px;padding:12px 18px;margin:12px 0;color:#155b62;font-size:13px}.study-bar>span{font-weight:700}.study-bar small{font-size:11px;font-weight:400}.study-bar>small{margin-left:auto;color:#527b7d}.study-bar strong{font-variant-numeric:tabular-nums;font-size:19px}.lesson-banner{display:flex;justify-content:space-between;align-items:center;gap:25px;padding:30px 34px;border-radius:25px;background:linear-gradient(115deg,#e0fbf3,#eaf9ff);border:1px solid #b9ebe1;margin-bottom:24px}.lesson-banner h1{font-size:clamp(28px,3.5vw,42px);max-width:680px}.lesson-banner .catalog-ar{font-size:21px;margin-bottom:12px}.lesson-motto{font-size:14px;color:#4c7a7b}.lesson-time{flex-shrink:0;background:linear-gradient(130deg,#20c6b4,#0999a7);color:white;border-radius:21px;padding:20px 24px;display:flex;align-items:center;flex-direction:column;gap:8px;box-shadow:0 9px 22px #109f9a21}.lesson-time svg{width:25px;height:25px}.lesson-time>span{font-size:10px;letter-spacing:1.5px;font-weight:800}.lesson-time strong{font-size:32px;font-variant-numeric:tabular-nums}.lesson-time small{font-size:13px}.lesson-layout{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:22px;align-items:start}.resource-panel{border-radius:23px;padding:22px;background:#ffffffc9;border:1px solid #d7eeec}.resource-heading{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:0 0 20px}.resource-heading h2{font-size:23px;margin:0}.resource-heading>span{color:#608188;font-size:15px}.resource-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:13px}.resource-tile{font-family:inherit;display:flex;flex-direction:column;align-items:flex-start;text-align:left;min-width:0;border:0;border-radius:15px;background:var(--tile);color:white;padding:17px 14px;cursor:pointer;box-shadow:inset 0 1px 0 #ffffff60,0 4px 9px #12465709;transition:transform .16s,box-shadow .16s}.resource-tile:hover{transform:translateY(-3px);box-shadow:0 9px 18px #12465720}.resource-tile:focus-visible{outline:3px solid #133f52;outline-offset:3px}.resource-symbol{background:#ffffffed;border-radius:11px;color:var(--tile);padding:8px;display:flex;margin-bottom:14px}.resource-symbol svg{width:28px;height:28px;stroke-width:2}.resource-tile strong{font-size:16px;line-height:1.35;margin-bottom:5px}.resource-tile>span[lang]{font-size:14px;margin-bottom:10px}.resource-tile>small{font-size:11px;line-height:1.5;margin-bottom:14px}.resource-status{margin-top:auto;background:#173e5730;border:1px solid #ffffff40;border-radius:7px;padding:5px 7px;font-size:10px;font-weight:700}.lesson-sidebar{display:grid;gap:20px}.assistant-panel{border-radius:23px;padding:22px;background:#effaff;border:1px solid #c9e7ee}.assistant-heading{display:flex;gap:11px;align-items:center;margin-bottom:16px}.assistant-heading>svg{width:37px;height:37px;color:#099fae}.assistant-heading h2{font-size:19px;margin:0 0 4px}.assistant-heading span{font-size:14px;color:#50727c}.planned-label{background:#dceeea;border-radius:6px;padding:6px 9px;font-size:11px;color:#2f656a;display:inline-block}.assistant-panel p{font-size:14px;line-height:1.8;color:#426b76}.assistant-example{padding:15px;background:#fff;border-radius:13px;font-size:14px;line-height:1.7;color:#466e78;margin:20px 0}.assistant-input{display:flex;align-items:center;gap:10px;justify-content:space-between;border:1px solid #bed9df;border-radius:10px;padding:12px;font-size:11px;color:#758f96}.assistant-input svg{width:18px;height:18px}.scientist-note{display:flex;gap:8px;align-items:center;border-radius:23px;background:linear-gradient(135deg,#def9e8,#e8f5fc);overflow:hidden;padding:16px 12px 0;border:1px solid #caeadd}.scientist-note img{width:105px;height:180px;object-fit:contain;object-position:bottom}.scientist-note strong{font-size:21px;color:#126d6e}.scientist-note p{font-size:13px;line-height:1.7}.scientist-note span{font-size:13px;line-height:1.8}.resource-dialog{border:0;border-radius:24px;padding:32px;max-width:470px;width:calc(100% - 36px);box-sizing:border-box;color:#194954;box-shadow:0 20px 80px #003c4940}.resource-dialog::backdrop{background:#063e4970;backdrop-filter:blur(4px)}.resource-dialog p{line-height:1.8}.dialog-close{float:right;border:0;background:#e5f5f3;border-radius:50%;width:34px;height:34px;cursor:pointer;font-size:24px;color:#245b62}.dialog-done{border:0;background:#079e9d;color:#fff;border-radius:10px;padding:13px 18px;font-family:inherit;cursor:pointer}@media(max-width:1050px){.lesson-layout{grid-template-columns:minmax(0,1fr) 245px}.resource-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.lesson-banner{padding:25px}.lesson-time{padding:17px}}@media(max-width:760px){.lesson-layout{grid-template-columns:1fr}.lesson-sidebar{grid-template-columns:1fr 1fr}.lesson-banner{align-items:flex-start;flex-direction:column}.lesson-time{align-self:stretch;display:grid;grid-template-columns:auto 1fr;gap:6px 14px}.lesson-time svg{grid-row:span 3}.lesson-time strong{font-size:28px}.lesson-time small{grid-column:2}.scientist-note{flex-direction:column-reverse}.study-bar>small{margin-left:0;width:100%}}@media(max-width:440px){.resource-panel{padding:15px}.resource-grid{gap:10px}.resource-tile{padding:14px 11px}.resource-tile strong{font-size:15px}.lesson-sidebar{grid-template-columns:1fr}.scientist-note{flex-direction:row}.lesson-banner{padding:22px}.resource-heading h2{font-size:20px}}@media(prefers-reduced-motion:reduce){.resource-tile{transition:none}.resource-tile:hover{transform:none}}
.visitor-badge{display:inline-flex;align-items:center;gap:12px;padding:11px 16px;background:#e8f8fb;border:1px solid #c6e7ed;border-radius:14px;color:#18677a;margin:12px 0;font-size:13px}.visitor-badge small{display:block;font-size:12px;margin-top:4px}.visitor-badge strong{font-size:22px;font-variant-numeric:tabular-nums}.visitor-badge>span:first-child{font-size:24px}.lesson-banner .visitor-badge{background:#ffffffba}.visitor-badge strong[title]{max-width:200px;overflow-wrap:anywhere}
.quick-guide{margin:18px 0;background:#fff;border:1px solid #bfe7e2;border-radius:18px;overflow:hidden;color:#174b56}.quick-guide summary{display:flex;align-items:center;gap:13px;padding:16px 20px;cursor:pointer;list-style:none;background:linear-gradient(110deg,#e6faf4,#eaf6ff)}.quick-guide summary::-webkit-details-marker{display:none}.quick-guide summary:focus-visible{outline:3px solid #087f82;outline-offset:-4px}.guide-mark{display:grid;place-items:center;width:36px;height:36px;border-radius:11px;background:#079fa6;color:white;font-size:23px;font-weight:800}.quick-guide summary>span:nth-child(2){display:flex;align-items:center;gap:14px;flex-wrap:wrap}.quick-guide summary strong{font-size:18px}.quick-guide summary span[lang]{font-size:17px;color:#31737a}.guide-chevron{margin-left:auto;font-size:25px;transition:transform .15s}.quick-guide[open] .guide-chevron{transform:rotate(180deg)}.guide-content{padding:8px 24px 22px}.guide-intro{font-size:14px;color:#527780;line-height:1.8}.guide-intro span{display:block;text-align:left}.guide-content ol{margin:0;padding-left:25px;display:grid;grid-template-columns:1fr 1fr;gap:12px 35px}.guide-content li{padding:8px 0;break-inside:avoid}.guide-content li::marker{color:#069ca2;font-weight:800}.guide-content li p{font-size:15px;line-height:1.65;margin:0 0 4px}.guide-content li p[lang]{color:#53717c;text-align:left}@media(max-width:650px){.guide-content ol{grid-template-columns:1fr;gap:4px}.quick-guide summary{padding:14px}.quick-guide summary>span:nth-child(2){gap:5px 12px}.guide-content{padding:8px 18px 18px}}@media(prefers-reduced-motion:reduce){.guide-chevron{transition:none}}
.suggestion-form{display:grid;gap:14px}.suggestion-form label{display:grid;gap:7px;font-size:14px;font-weight:700}.suggestion-form input,.suggestion-form textarea,.suggestion-form select{box-sizing:border-box;width:100%;font:inherit;padding:12px;border:1px solid #b6d8d8;border-radius:10px;background:#fff;color:#164955}.suggestion-form p{line-height:1.8}.suggestion-form button{justify-self:start}.suggestion-form button:disabled{opacity:.6}.suggestion-box{margin:25px 0}.review-card{padding:24px;border:1px solid #c3e5df;border-radius:20px;margin:20px 0;background:white}.suggestion-message{white-space:pre-wrap;overflow-wrap:anywhere}
.pdf-reader{width:min(1120px,96vw);height:92vh;max-height:92vh;padding:0;border:1px solid #c5e8e4;border-radius:20px;color:#164b55;background:#f3fbf9}.pdf-reader[open]{display:flex;flex-direction:column}.pdf-reader::backdrop{background:#093e4e99}.pdf-reader header{display:flex;justify-content:space-between;gap:15px;padding:16px 22px;align-items:center}.pdf-reader h2{margin:0 0 4px;font-size:21px}.pdf-reader nav{display:flex;gap:12px;flex-wrap:wrap;padding:0 22px 10px}.pdf-reader nav a{background:#078f9a;color:white;text-decoration:none;border-radius:9px;padding:10px 14px;font-size:13px}.pdf-reader iframe{width:100%;flex:1;min-height:220px;border:0;background:white}.pdf-hint{font-size:12px;line-height:1.5;margin:0;padding:0 22px 12px;color:#52747e}.pdf-hint span{display:block}.locked-lesson{border-style:dashed;background:#edf3f4}.locked-lesson h2{font-size:21px}.locked-lesson p{line-height:1.8}.resource-tile[data-pdf]{box-shadow:0 0 0 2px #fff,0 0 0 4px #ec6a7940}.resource-tile[data-pdf] .resource-status{background:#fff;color:#ae2842;font-weight:800}
.study-reader{width:min(1440px,98vw);height:96vh;max-height:96vh}.study-reader header{padding:12px 18px}.reader-tools{display:flex;align-items:center;gap:7px;flex-wrap:wrap;padding:8px 16px;border-top:1px solid #d1e8e3;border-bottom:1px solid #d1e8e3;background:#fff}.reader-tools button,.reader-tools select,.reader-tools a{font:inherit;font-size:13px;padding:8px 10px;border:1px solid #bee0dd;border-radius:8px;background:#edf9f6;color:#175c66;text-decoration:none;cursor:pointer}.reader-tools button:disabled{opacity:.4;cursor:default}.reader-tools label{font-size:13px}.reader-tools output{min-width:42px;text-align:center;font-size:13px}.toolbar-divider{height:23px;border-left:1px solid #c8dedb;margin:0 5px}.reader-tip{font-size:12px;padding:8px 18px;margin:0;line-height:1.6;color:#49747b}.reader-tip span{display:block}.reader-workspace{display:grid;grid-template-columns:minmax(0,1fr) 295px;flex:1;min-height:0;overflow:hidden;border-top:1px solid #d3e9e4}.pdf-stage{overflow:auto;background:#d8e4e5;padding:14px;box-sizing:border-box}.pdf-paper{position:relative;margin:0 auto;background:white;box-shadow:0 4px 18px #24485525}.pdf-paper canvas{display:block}.pdf-word-layer{position:absolute;inset:0;overflow:hidden;user-select:text;touch-action:pan-x pan-y}.pdf-word{position:absolute;color:transparent;line-height:1;white-space:pre;font-family:Arial,sans-serif;cursor:text;overflow:visible;transform-origin:left top}.pdf-word:hover{background:#ffc93a65;outline:1px solid #e4a82075}.pdf-word::selection{background:#1dcbbb65;color:transparent}.word-panel{padding:20px;background:#f5fcfa;overflow:auto;border-left:1px solid #c6e3dd}.word-heading{display:flex;justify-content:space-between;gap:8px;font-size:10px;letter-spacing:.6px;color:#168a8d;font-weight:800}.word-heading span[lang]{letter-spacing:0;font-size:13px}#selectedWord{font-size:24px;font-weight:800;line-height:1.6;overflow-wrap:anywhere;max-height:185px;overflow:auto;color:#154f5c}#wordMeaning{font-size:22px;line-height:1.7;color:#067e82}#wordDefinition,#wordExplanation{font-size:16px;line-height:1.8}.word-actions{display:grid;grid-template-columns:1fr 1fr;gap:9px}.word-actions button,.word-actions a{font-family:inherit;text-align:center;cursor:pointer;padding:12px 8px;border:1px solid #b8e0d7;border-radius:10px;background:white;color:#125f68;font-size:13px;text-decoration:none}.word-actions #translateSelection,.word-actions #askSelection{grid-column:1/-1}.word-actions #translateSelection{background:#098eab;color:white;border:0}.word-actions a small{display:block;margin-top:4px}.ocr-note{display:block;font-size:11px;line-height:1.8;color:#617b80;margin-top:18px}#wordStatus{font-size:12px;line-height:1.6}.study-reader button:focus-visible,.study-reader a:focus-visible{outline:3px solid #168baf;outline-offset:2px}@media(max-width:760px){.reader-workspace{grid-template-columns:1fr;grid-template-rows:minmax(180px,1fr) auto}.word-panel{max-height:220px;border-left:0;border-top:1px solid #c6e3dd;padding:12px 16px}.word-heading{display:none}#selectedWord{font-size:21px;margin:5px 0;max-height:85px}#wordMeaning{font-size:20px;margin:5px 0}.word-actions{grid-template-columns:repeat(3,1fr);gap:7px}.word-actions #translateSelection{grid-column:1/3}.word-actions #askSelection{grid-column:auto}.word-actions button,.word-actions a{font-size:12px;padding:8px}.reader-tools{padding:6px 10px;gap:5px}.reader-tip{padding:5px 12px;font-size:10px}.study-reader h2{font-size:17px}.reader-tools button,.reader-tools a{font-size:12px;padding:7px}.ocr-note{margin-top:9px}.study-reader{border-radius:12px;width:99vw;max-width:99vw}}

.edit-extracted{font-size:12px;margin-top:14px;color:#557980}.edit-extracted summary{cursor:pointer}.edit-extracted textarea{box-sizing:border-box;width:100%;font:16px/1.6 Arial;padding:8px;margin-top:8px;border:1px solid #bbdbd5;border-radius:8px}.edit-extracted button{border:0;border-radius:7px;background:#138d99;color:white;padding:8px 15px;margin-top:5px}
.assistant-answer{margin:16px 0;padding:14px;border:1px solid #c3e7df;border-radius:14px;background:#fff;max-height:300px;overflow:auto}.assistant-answer strong{display:block;color:#087f87;margin-bottom:7px}.assistant-answer p{font-size:14px;line-height:1.75;margin:6px 0}.assistant-answer .answer-ar{font-size:17px;color:#075f67}.meaning-list{padding-right:20px;font-size:15px;line-height:1.9}.answer-note{color:#607b80}.word-actions button small{display:block;margin-top:4px}.word-actions #smartTranslate,.word-actions #smartExplain{background:#098eab;color:white;border:0}.word-actions #translateSelection{background:white;color:#125f68;border:1px dashed #8bbdc1}.pdf-word{min-height:9px}.pdf-word:hover{background:#ffd43b99;outline:2px solid #e1a900aa}
.resource-tile strong{font-size:1.25rem;font-weight:800;line-height:1.4;overflow-wrap:anywhere}
.resource-tile>span[lang]{font-size:1.125rem;font-weight:700;line-height:1.6}
.resource-tile>small{font-size:.875rem;font-weight:600;line-height:1.6}
.resource-tile .resource-status{font-size:.875rem;font-weight:700;line-height:1.5;white-space:normal}
.learning-card .card-copy h2{font-size:1.5rem;font-weight:800;line-height:1.4}
.learning-card .card-copy>p{font-size:1.125rem;font-weight:700;line-height:1.6}
.study-reader .reader-tools button,.study-reader .reader-tools a,.study-reader .reader-tools label,.study-reader .reader-tools select{font-size:1rem;font-weight:700}
.study-reader .word-actions button,.study-reader .word-actions a{font-size:1rem;font-weight:700;line-height:1.5;overflow-wrap:anywhere}
.study-reader .word-actions small{font-size:.875rem;font-weight:700}
@media(max-width:570px){.resource-panel .resource-grid{grid-template-columns:1fr}.resource-tile strong{font-size:1.25rem}.resource-tile>span[lang]{font-size:1.125rem}}
/* Approved BioGenius visual identity: see BRAND_GUIDE.md. */
:root{--ink:#073c50;--teal:#008e9c;--line:#a9e3df;--muted:#365b6a}
body{background:radial-gradient(ellipse at 0 10%,#b8f5e7 0,transparent 48%),radial-gradient(ellipse at 100% 30%,#c4edff 0,transparent 46%),#f3fffd}
.top{border-bottom:3px solid #1ac5b4}
.study-bar{background:linear-gradient(110deg,#007e86,#006b95);color:#fff;border:1px solid #24c9b9;box-shadow:0 5px 16px #056e8a20;font-size:1rem}
.study-bar>small{color:#e1fffa;font-size:.875rem}.study-bar small{font-size:.875rem}.study-bar strong{font-size:1.4rem}
.portrait{background:linear-gradient(145deg,#31d5b6,#75ebda 48%,#37bade);border:3px solid #fff;box-shadow:0 10px 0 #25a9aa25,0 20px 40px #008c9b26}
.hello-bubble{border:2px solid #0e9ba6;color:#064454}
.lesson-banner{background:linear-gradient(115deg,#b9f4df,#c3f0ff);border:2px solid #31c4b5;box-shadow:0 7px 0 #09989116,0 14px 28px #126b8512}
.lesson-time{background:linear-gradient(135deg,#009c90,#006a86);border:2px solid #67efcf;box-shadow:inset 0 2px 0 #ffffff50,0 6px 0 #025b7326}.lesson-time>span{font-size:.875rem;letter-spacing:.06em}.lesson-time strong{font-size:2rem}
.resource-panel{background:#fff;border:2px solid #76dcd0;box-shadow:0 10px 28px #087b8715}
.resource-heading{border-bottom:2px solid #b9ece3;padding-bottom:16px}.resource-heading h2{color:#006b79;font-weight:800}.resource-heading>span{color:#215969;font-weight:700}
.resource-tile{background:linear-gradient(145deg,color-mix(in srgb,var(--tile) 80%,white),var(--tile) 42%,color-mix(in srgb,var(--tile) 82%,#002b50));border:1px solid #ffffffa6;border-bottom:5px solid color-mix(in srgb,var(--tile) 68%,#002b50);border-radius:19px;box-shadow:inset 0 2px 0 #ffffff65,0 7px 12px #0647581c;padding:20px 17px;gap:2px}
.resource-tile:hover{transform:translateY(-4px);box-shadow:inset 0 2px 0 #ffffff75,0 13px 20px #06475829}
.resource-symbol{background:#fff;border:1px solid #ffffffa0;box-shadow:0 4px 9px #003f4d22;border-radius:14px;padding:11px}.resource-symbol svg{width:32px;height:32px}
.resource-tile .resource-status{background:#06283d70;border:1px solid #ffffff60;color:#fff}
.resource-tile:nth-child(2),.resource-tile:nth-child(10){color:#092e43}.resource-tile:nth-child(2) .resource-status,.resource-tile:nth-child(10) .resource-status{background:#ffffffd9;color:#173a4b;border-color:#fff}
.learning-card{border:2px solid color-mix(in srgb,var(--card-color) 50%,white);box-shadow:0 7px 0 color-mix(in srgb,var(--card-color) 18%,transparent),0 16px 28px #07485d14}
.card-art{background:linear-gradient(140deg,color-mix(in srgb,var(--card-color) 75%,white),var(--card-color));color:#fff;border-bottom:3px solid color-mix(in srgb,var(--card-color) 65%,#033747)}
.card-index{font-size:.875rem;letter-spacing:.08em;background:#03344865;border:1px solid #ffffff70;padding:6px 10px;border-radius:8px}.card-art>svg{filter:drop-shadow(0 4px 3px #03384830)}
.card-copy{background:#fff}.card-bottom{font-size:1rem}.grade-card{background:linear-gradient(115deg,#b5f2de,#c6efff);border:2px solid #25bcb3;box-shadow:0 7px 0 #0e95971a}.grade-number{background:linear-gradient(135deg,#00978c,#00789e)}
.assistant-panel{padding:20px;background:linear-gradient(160deg,#d1fff0,#d0f2ff);border:2px solid #25bfb5;border-radius:24px;box-shadow:0 7px 0 #10a5a220,0 15px 25px #005f7c16}
.assistant-heading{gap:12px;align-items:center}.assistant-heading>div{min-width:0}.assistant-heading h2{font-size:1.25rem;font-weight:800;color:#063e56}.assistant-heading span{color:#245667;font-weight:700}
.assistant-mascot{width:86px;height:86px;object-fit:contain;flex-shrink:0;filter:drop-shadow(0 5px 4px #086d8630)}
.assistant-panel p{font-size:1rem;line-height:1.75;color:#224e60}.assistant-example{background:#fff;border:1px solid #72d8c9;border-radius:17px;font-size:1rem;box-shadow:0 4px 0 #2aafa614}
.assistant-open{display:block;width:100%;padding:14px 12px;background:linear-gradient(120deg,#007e8c,#006390);color:#fff;border:0;border-bottom:4px solid #054a67;border-radius:13px;font:700 1rem/1.5 Arial;cursor:pointer}.assistant-open small{display:block;font-size:.875rem;margin-top:4px}.assistant-scope{display:block;font-size:.875rem;line-height:1.7;color:#315966;margin:14px 0 0}
.word-panel{background:linear-gradient(170deg,#d2fff0,#d9f4ff);border-left:2px solid #49c7bf;padding:18px}.word-heading{display:flex!important;justify-content:flex-start;align-items:center;gap:10px;letter-spacing:0;border-bottom:2px solid #70d5cf;padding-bottom:12px;color:#083f57;font-size:1rem}.word-heading>div{min-width:0}.word-heading strong{display:block;font-size:1.125rem;font-weight:800}.word-heading span[lang]{display:block;font-size:1rem;margin-top:5px}.word-heading .assistant-mascot{width:64px;height:64px}
.assistant-answer{background:#fff;border:2px solid #89dcd0;box-shadow:0 5px 0 #19a89b15;border-radius:18px;max-height:none;padding:16px}.assistant-answer strong{color:#006977;font-size:1rem}.assistant-answer p{font-size:1rem}.assistant-answer .answer-ar{font-size:1.125rem}
.study-reader .word-actions button{box-shadow:0 3px 0 #0b7f9020}.word-actions #smartTranslate{background:linear-gradient(135deg,#027eaf,#00658e)}.word-actions #smartExplain{background:linear-gradient(135deg,#8550da,#6038b2)}
.study-reader header{background:linear-gradient(110deg,#007f83,#00627e);color:#fff}.study-reader .reader-tools{background:#edfff9;border-bottom:2px solid #70d4c7}.study-reader .reader-tools button,.study-reader .reader-tools a{background:#fff;border:1px solid #32aaa8;box-shadow:0 2px 0 #119a9917}.reader-tip{font-size:.875rem;color:#294f60;background:#fff}
.quick-guide{border:2px solid #54cbbd;box-shadow:0 5px 0 #089e9412}.quick-guide summary{background:linear-gradient(105deg,#aff0da,#bcf0fa)}.guide-mark{background:linear-gradient(130deg,#007e7d,#006a98)}.quick-guide summary strong{font-weight:800;color:#064e60}.visitor-badge{border:2px solid #55c3d6;background:#d2f7ff;color:#06475e}.scientist-note{background:linear-gradient(140deg,#b1f0c8,#9de3f0);border:2px solid #40b6bb}
@media(max-width:760px){.word-panel{max-height:44vh;border-left:0;border-top:2px solid #41c7bd}.word-heading .assistant-mascot{width:52px;height:52px}.reader-tip{font-size:.875rem}.assistant-heading{flex-wrap:wrap}.resource-tile{padding:19px 16px}}
@media(prefers-reduced-motion:reduce){.resource-tile:hover{transform:none}}