.course-switch{display:flex;gap:10px;margin:22px 0}.course-switch button{display:flex;align-items:center;gap:15px;padding:13px 20px;border:1px solid #dce4ed;background:white;border-radius:12px;font-weight:750;color:#52657b;cursor:pointer}.course-switch button.active{background:#edf7ff;border-color:#73acdc;color:#236b9e}.course-switch small{font-weight:450;color:#718298}.thinkly-hero{display:grid;grid-template-columns:1.2fr 1fr;align-items:center;background:#ecf4fa;border:1px solid #dce7ef;border-radius:24px;padding:30px 40px;margin:20px 0 30px;overflow:hidden}.thinkly-hero.little-hero{background:#fff6df;border-color:#f5e8c8}.thinkly-hero h2{font-size:42px;line-height:1.13;letter-spacing:-1.8px;margin:16px 0;color:#284760}.thinkly-hero p{max-width:460px;font-size:16px;color:#63768a;line-height:1.7}.hero-tag{font-size:11px;letter-spacing:1.7px;color:#718b86;font-weight:800}.hero-footnote{display:block;font-size:12px;color:#7c8c94;margin-top:18px}.thinkly-hero-art svg{width:100%;max-height:320px}.hello-sun{color:#efb93f}.adventure-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-bottom:30px}.adventure-card{text-align:left;border:1px solid #e0e9df;border-radius:18px;padding:24px;position:relative;overflow:hidden;cursor:pointer;color:#365668;background:#f5f9ef}.adventure-card.secondary{background:#f0f6fc;border-color:#dce7f0}.adventure-card:hover{transform:translateY(-2px);box-shadow:0 6px 15px #34496010}.adventure-badge{font-size:11px;letter-spacing:1.2px;font-weight:800}.adventure-card h3{font-size:22px;margin:16px 0 8px}.adventure-card p{color:#768795}.adventure-doodles{font-size:35px;color:#eab44c;letter-spacing:10px;margin:25px 0}.adventure-doodles span{color:#6caebd}.adventure-card b{font-size:13px}.pk-sequence{display:flex;align-items:center;justify-content:center;gap:16px;flex-wrap:wrap;width:100%}.pk-sequence-item{flex:0 1 180px;min-width:45px;max-width:220px}.pk-sequence-item>b{font-size:40px;color:#60718e}.pk-sequence-item svg{width:100%;max-height:190px}.pk-number-model{font-size:100px;font-weight:800;color:#5c8cc3;text-align:center;line-height:1.2}.pk-direction{font-size:22px;font-weight:700;color:#5d87ac}.pk-sort-bin{border:3px dashed #b4c7df;border-radius:18px;padding:10px;width:180px;margin:auto;color:#647a99;font-size:15px}.pk-sort-bin svg{display:block;width:80px;margin:auto}.pk-answer-head,.pk-count-tools{display:flex;align-items:center;justify-content:space-between;gap:15px;margin:20px 0;color:#8a98a6;font-size:13px}.listen-button{border:1px solid #c0d9e8;color:#357ea5;background:#eff8fe;border-radius:25px;padding:10px 20px;font-weight:700;cursor:pointer}.pk-answers{display:flex;flex-wrap:wrap;gap:15px;justify-content:center;margin:20px 0 30px}.pk-answer{flex:1 1 130px;max-width:280px;min-height:100px;border:2px solid #dfe9f2;border-bottom-width:5px;border-radius:18px;background:white;cursor:pointer;transition:transform .1s,border-color .1s;display:flex;align-items:center;justify-content:center;padding:15px;color:#365c85}.pk-answer strong{font-size:38px;line-height:1.3}.pk-answer svg{width:100%;max-height:195px}.pk-answer:hover:not(:disabled),.pk-answer:focus-visible{border-color:#6faed9;background:#f2f9ff;transform:translateY(-3px)}.pk-answer.selected{background:#eef9ec;border-color:#7fbd72}.pk-answer:disabled{cursor:default;opacity:1}.picture-answers .pk-answer{flex-basis:170px}.number-answers .pk-answer{max-width:170px}.pk-pick-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(65px,1fr));gap:10px;margin:20px 0}.pk-pick{border:2px solid #dbe6f1;border-radius:15px;background:#fff;padding:6px;position:relative;cursor:pointer}.pk-pick svg{width:100%;max-height:90px}.pk-pick span{position:absolute;right:4px;bottom:4px;border-radius:50%;background:#e7eef5;width:22px;height:22px;color:#59758e}.pk-pick.picked{border-color:#7eb37a;background:#eef8e9}.pk-pick.picked span{background:#7eb37a;color:white}.prek-mode .question{border-radius:22px;border-color:#e2e9ef}.prek-mode .question h2{font-size:27px;color:#3b526d;line-height:1.45}.prek-mode .diagram>svg{max-height:300px;max-width:540px}.prek-mode .question-number{color:#a8b8c5;font-size:11px}.prek-mode .practice-tools{background:#f4f8fc;border-color:#e3edf4}.prek-mode .practice-tools button{color:#57799b}.prek-mode .practice-heading h1{font-size:25px}.prek-mode .question .submit-row{justify-content:center}.prek-mode .practice-main .related{background:#f8fafb;border-radius:16px;padding:20px}.prek-mode .order-pool button{font-size:28px;min-width:70px;min-height:70px}.prek-mode .primary{background:#5b9c72;border-radius:12px}.prek-mode .success-feedback{background:#edf8e9;border-radius:18px}.brand{letter-spacing:-1.5px}.brand>span:first-child{color:#6a9fcb}.workspace{letter-spacing:1px}.prek-mode .practice-aside .practice-stat{border-radius:16px}.course-discovery .section-head{margin-top:30px}@media(max-width:800px){.thinkly-hero{padding:25px;grid-template-columns:1fr}.thinkly-hero h2{font-size:34px}.thinkly-hero-art{max-width:300px;margin:auto}.adventure-grid{grid-template-columns:1fr}.course-switch{flex-wrap:wrap}.course-switch button{flex:1;justify-content:center;padding:12px}.course-switch small{display:none}.pk-answer{min-width:100px}.pk-answer strong{font-size:32px}.pk-sequence{gap:7px}.pk-sequence-item{flex-basis:110px}}
.prek-mode .question form:has(.pk-answers) .submit-row{display:none}.pk-answer:disabled:not(.selected){opacity:.65}
/* Keep the question and tap targets together on laptop-height screens. */
.prek-mode.practising .practice-heading{padding:4px 0}.prek-mode.practising .practice-bread{margin-bottom:8px}.prek-mode.practising .practice-layout{padding-top:18px}.prek-mode.practising .question{padding:15px 5px;min-height:280px}.prek-mode.practising .question h2{font-size:24px;margin:8px 0 12px}.prek-mode.practising .question .diagram{margin:12px 0}.prek-mode.practising .question .diagram>svg{max-height:175px;max-width:470px}.prek-mode.practising .pk-answer-head{margin:12px 0}.prek-mode.practising .pk-answers{margin:12px 0 18px}.prek-mode.practising .pk-answer{min-height:80px}.prek-mode.practising .picture-answers .pk-answer svg{max-height:155px}@media(max-width:600px){.prek-mode.practising .question .diagram>svg{max-height:155px}.prek-mode.practising .pk-answer{min-height:70px}.prek-mode.practising .question h2{font-size:21px}}
/* Four bright, readable course entry points. */
.course-switch{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:13px;margin:22px 0 28px}.course-switch button{position:relative;display:flex;justify-content:flex-start;gap:12px;padding:19px 16px;min-height:93px;border:2px solid transparent;border-radius:17px;box-shadow:0 4px 0 #253b5710;text-align:left;color:#354c63}.course-switch button>span:nth-child(2){display:flex;flex-direction:column;gap:7px;min-width:0}.course-switch b{font-size:17px;line-height:1.25;white-space:normal}.course-switch small{display:block;font-size:13px;color:inherit;opacity:.8}.course-tab-icon{font-size:28px}.course-tab-arrow{margin-left:auto;opacity:.55;font-size:20px}.course-switch .course-pre-k{background:#fce3e7;color:#a65070}.course-switch .course-kindergarten{background:#fff0bd;color:#8c6519}.course-switch .course-grade-1{background:#d9f0e8;color:#287861}.course-switch .course-class-8{background:#deebfd;color:#3b6ba9}.course-switch button.active{border-color:currentColor;box-shadow:0 5px 0 #253b5717}.course-switch button:hover{transform:translateY(-2px);filter:brightness(1.02)}.adventure-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.adventure-card{padding:23px 20px;min-height:250px}.adventure-card h3{font-size:20px;line-height:1.35;letter-spacing:-.4px}.adventure-card p{font-size:13px;line-height:1.7}.adventure-doodles{font-size:29px;letter-spacing:0;white-space:nowrap;margin:21px 0}.adventure-pre-k{background:#fff0f2;border-color:#f3d9e0}.adventure-kindergarten{background:#fff8df;border-color:#f1e3b6}.adventure-grade-1{background:#edf9f3;border-color:#cfe8dd}.adventure-class-8{background:#eef5ff;border-color:#d7e5f8}.hero-kindergarten.little-hero{background:#fff6d6}.hero-grade-1.little-hero{background:#eaf6ee}.discovery-panel .skill-row{gap:16px;padding:22px 0 0;margin-top:22px}.discovery-panel .skill-row>div{min-width:0;flex:1}.discovery-panel .skill-row h3{font-size:17px;line-height:1.5;letter-spacing:0;margin:0 0 6px;white-space:normal}.discovery-panel .skill-row small{font-size:13px;line-height:1.6}.discovery-panel .skill-row>button{font-size:14px;padding:12px 15px;min-height:44px;border-radius:10px;background:#edf5fa;color:#33779c;flex-shrink:0}.discovery-panel .skill-icon{width:44px;height:44px;flex-shrink:0;font-size:22px}.discovery-panel .score-line{font-size:12px;margin-top:10px}.daily-panel .subtitle{font-size:14px}.pk-answer strong.word-answer{font-size:19px;line-height:1.45;overflow-wrap:anywhere}.pk-answers.ordinal-answers{flex-wrap:nowrap;justify-content:flex-start;overflow-x:auto;padding:5px 3px 13px}.ordinal-answers .pk-answer{flex:0 0 76px;min-width:76px;min-height:90px;padding:6px}.ordinal-answers .pk-answer svg{max-height:75px}.prek-mode.practising .question .diagram.large-model>svg{max-height:460px;max-width:100%}.ta-course{flex-wrap:wrap}.ta-course button{padding:10px 15px}@media(max-width:1100px){.adventure-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.course-switch button{padding:16px 12px;gap:8px}.course-switch b{font-size:15px}.course-tab-icon{font-size:23px}.course-tab-arrow{display:none}}@media(max-width:760px){.home-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:20px}.home-grid .panel{min-width:0;padding:22px}.course-switch{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.course-switch button{min-height:92px;padding:16px 14px;justify-content:flex-start;gap:10px}.course-switch small{display:block;font-size:13px}.course-switch b{font-size:16px}.course-tab-icon{font-size:26px}.adventure-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.adventure-card{padding:20px 16px;min-height:240px}.adventure-card h3{font-size:19px}.adventure-doodles{font-size:25px}.discovery-panel .section-head h2{font-size:21px;line-height:1.4}.discovery-panel .section-head a{font-size:14px;white-space:nowrap}.discovery-panel .skill-row{display:grid;grid-template-columns:42px minmax(0,1fr);align-items:start;gap:10px 13px;padding-top:20px;margin-top:20px}.discovery-panel .skill-row h3{font-size:18px;line-height:1.5}.discovery-panel .skill-row small{font-size:14px;line-height:1.5;display:block}.discovery-panel .skill-row>button{grid-column:2;justify-self:start;font-size:16px;min-height:46px;padding:12px 18px;margin-top:3px}.discovery-panel .score-line{font-size:13px}.thinkly-hero h2{font-size:32px}.thinkly-hero p{font-size:16px;line-height:1.7}.home-grid .daily-panel h3{font-size:19px}.home-grid .daily-panel .subtitle{font-size:15px}.ta-toolbar{flex-wrap:wrap;gap:15px}.ta-course button{padding:10px 12px}.pk-answer strong.word-answer{font-size:17px}}@media(max-width:420px){.adventure-grid{grid-template-columns:minmax(0,1fr)}.adventure-card{min-height:0;padding:22px}.adventure-card h3{font-size:22px}.adventure-doodles{font-size:30px}.course-switch button{padding:14px 10px}.course-switch b{font-size:15px}.course-tab-icon{font-size:23px}.home-grid .panel{padding:20px}.discovery-panel .section-head{gap:10px}.discovery-panel .section-head h2{font-size:20px}.discovery-panel .skill-row h3{font-size:18px}}

.course-switch .course-pre-k.active{background:#fce3e7;color:#a65070}.course-switch .course-kindergarten.active{background:#fff0bd;color:#8c6519}.course-switch .course-grade-1.active{background:#d9f0e8;color:#287861}.course-switch .course-class-8.active{background:#deebfd;color:#3b6ba9}
.worked-choice-set{display:flex;flex-wrap:wrap;justify-content:center;gap:14px;margin:18px 0}.worked-picture-choice{flex:1 1 130px;max-width:230px;min-width:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:14px;border:2px solid #e3eaf0;border-radius:14px;background:#fff}.worked-picture-choice.correct{border-color:#56aa76;background:#f1fbf5}.worked-picture-choice>svg{width:100%;height:150px;max-width:210px}.worked-picture-choice b{font-size:14px;color:#39566b}
.course-switch{grid-template-columns:repeat(3,minmax(0,1fr))}.adventure-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.course-switch .course-grade-2,.course-switch .course-grade-2.active{background:#ffe5c9;color:#9b6129}.course-switch .course-grade-3,.course-switch .course-grade-3.active{background:#e9e2fb;color:#76579d}.adventure-grade-2{background:#fff3e4;border-color:#f1dbbd}.adventure-grade-3{background:#f4efff;border-color:#e0d6f4}.hero-grade-2.little-hero{background:#fff0dc}.hero-grade-3.little-hero{background:#f0eafb}.primary-model-pair{display:flex;gap:15px;justify-content:center;align-items:center}.primary-model-pair>svg{max-width:47%;max-height:240px}.primary-equation{display:flex;gap:15px;justify-content:center;align-items:center;font-size:30px;padding:20px}.primary-blank{border:2px dashed #80adc3;border-radius:10px;padding:10px 23px;color:#428ca8}.vertical-calculation{font:32px ui-monospace,monospace;text-align:right;max-width:220px;margin:15px auto;padding:20px;border-radius:14px;background:#f5f9fc}.vertical-calculation>div{display:flex;justify-content:space-between}.vertical-calculation hr{border:0;border-top:2px solid #abc5d5}.learning-stage{display:flex;align-items:center;gap:10px;background:#f3f8fc;border-radius:12px;padding:10px 14px;margin:0 0 20px;font-size:13px;line-height:1.5;color:#53718a}.learning-stage b{color:#3688a4}.fraction-tick-line{display:flex;justify-content:space-between;position:relative;margin:35px 8px;gap:0;border-top:3px solid #7aa5ba}.fraction-tick-line button{border:0;background:none;position:relative;top:-18px;display:flex;align-items:center;flex-direction:column;padding:0;min-width:20px;min-height:50px;color:#54748e}.fraction-tick-line button span{font-size:26px}.fraction-tick-line .selected{color:#d76f91}.construction-grid{display:grid;grid-template-columns:repeat(var(--columns),minmax(12px,1fr));max-width:460px;gap:3px;margin:20px auto}.construction-grid button{aspect-ratio:1;background:#edf4f7;border:1px solid #aac8d6;border-radius:3px;padding:0;min-width:0}.construction-grid button.filled{background:#73b8c8;border-color:#3e92a6}.polygon-board{position:relative;max-width:360px;aspect-ratio:360/280;margin:15px auto}.polygon-board>svg{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}.polygon-dot-grid{position:absolute;inset:0;display:grid;grid-template-columns:repeat(9,1fr);grid-template-rows:repeat(7,1fr)}.polygon-dot-grid button{border:0;background:none;color:#8cabbc;padding:0;font-size:25px;min-width:0}.polygon-dot-grid button.selected{border-radius:50%;color:#257b97;background:#ccecf17a;font-size:15px}.graph-builder{display:flex;justify-content:center;gap:18px;margin:25px 0}.graph-builder>label{display:flex;flex:1;max-width:120px;min-width:0;flex-direction:column;align-items:center;gap:8px}.graph-builder input{width:100%;max-width:90px;text-align:center}.builder-column{height:140px;width:65px;background:linear-gradient(to top,#80c3d3 var(--height),#f1f6f9 var(--height));border:1px solid #b2cfdb;display:flex;align-items:end;justify-content:center;padding:10px;border-radius:8px}.money-bill{text-align:center;border:2px solid #83aa8f;background:#e9f3e8;border-radius:9px;padding:20px;max-width:220px;margin:10px auto;font-size:23px}@media(max-width:760px){.course-switch,.adventure-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.learning-stage{align-items:flex-start;flex-direction:column;gap:3px}.primary-equation{font-size:24px;gap:10px}.graph-builder{gap:8px}.builder-column{width:50px}}@media(max-width:420px){.adventure-grid{grid-template-columns:minmax(0,1fr)}}
.learning-scaffold{border-left:3px solid #91c7d6;padding:10px 15px;margin:0 0 18px;background:#f8fbfd;color:#52718b;font-size:14px;line-height:1.6}.learning-scaffold p{margin:5px 0 0}
/* Pre-K English uses a deliberate Submit step after choosing letter cards. */
.prek-mode .english-prek-practice .question form:has(.pk-answers) .submit-row{display:flex}
.course-switch .course-grade-9{background:#ece4fb;color:#5b3fa0}
.course-switch .course-grade-9.active{background:#ece4fb;color:#5b3fa0}
.adventure-grade-9{background:#f4eefe;border-color:#e0d4f6}

/* Home page: a clear class and subject gateway with a personal starting point. */
.thinkly-home-greeting{margin-bottom:22px}
.home-intro{position:relative;display:grid;grid-template-columns:minmax(0,1.15fr) minmax(250px,.85fr);align-items:center;min-height:320px;margin:0 0 34px;padding:36px clamp(26px,4vw,58px);overflow:hidden;border:1px solid #cfe7d8;border-radius:24px;background:linear-gradient(115deg,#e7f8ee 0%,#e9f6e4 50%,#d8f1f4 100%)}
.home-intro:before{content:'';position:absolute;width:360px;height:360px;right:-115px;bottom:-210px;border-radius:50%;background:#bde6a7;opacity:.8}
.home-intro-copy{position:relative;z-index:1}.home-intro-kicker{font-size:12px;letter-spacing:.17em;font-weight:850;color:#408468}.home-intro h2{margin:12px 0 15px;font-size:clamp(36px,4.4vw,58px);line-height:1.06;letter-spacing:-.06em;color:#254d46}.home-intro h2 em{font-style:normal;color:#558b2c}.home-intro p{max-width:530px;margin:0;font-size:17px;line-height:1.65;color:#516f65}.home-intro-actions{display:flex;align-items:center;flex-wrap:wrap;gap:18px;margin-top:24px}.home-intro-actions a{color:#326e72;font-size:14px;font-weight:750;text-decoration:none}.home-intro-actions a:hover{text-decoration:underline}
.home-intro-art{position:relative;z-index:1;display:grid;place-items:center;min-height:260px}.home-art-circle{width:min(100%,350px);aspect-ratio:1.15;display:grid;place-items:center;border-radius:50%;background:radial-gradient(circle,#fffdf5 25%,#d2efcc 70%,transparent 72%)}.home-art-circle svg{width:96%;height:auto;max-height:280px}.home-art-sun{position:absolute;top:7%;right:12%;display:grid;place-items:center;width:65px;height:65px;border-radius:50%;background:#ffe79b;color:#df9b26;font-size:38px;box-shadow:0 6px 0 #e8cf81}.home-art-spark{position:absolute;color:#7ab9bc;font-size:32px}.home-art-spark.one{left:6%;top:23%}.home-art-spark.two{right:4%;bottom:13%;color:#efbf68}
.home-course-gateway{margin-bottom:34px}.home-course-gateway .section-head{margin-bottom:16px}.home-course-gateway .section-head h2{margin:4px 0 4px;font-size:29px;color:#284d4f}.home-course-gateway .section-head p{margin:0;color:#6d817e;font-size:15px}.home-course-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.home-course-card{display:flex;flex-direction:column;min-width:0;min-height:230px;padding:22px;border:1px solid #dde8e7;border-top:5px solid #9bcbb9;border-radius:17px;background:#fff;box-shadow:0 5px 16px rgba(38,75,65,.06)}.home-course-card:nth-child(4n+2){border-top-color:#ecc16b}.home-course-card:nth-child(4n+3){border-top-color:#97c1e5}.home-course-card:nth-child(4n+4){border-top-color:#c8b4df}.home-course-top{display:flex;align-items:flex-start;gap:13px;margin-bottom:15px}.home-course-icon{flex:none;display:grid;place-items:center;width:48px;height:48px;border-radius:13px;background:#eef7ec;font-size:29px}.home-course-top h3{margin:0 0 4px;color:#315453;font-size:22px;line-height:1.2}.home-course-top p{margin:0;color:#728282;font-size:13px;line-height:1.35}.home-course-links{margin-top:auto}.home-subject-link{display:flex;align-items:center;justify-content:space-between;width:100%;min-height:38px;padding:8px 3px;border:0;border-top:1px solid #e8eded;background:transparent;color:#346a79;font-size:14px;text-align:left;cursor:pointer}.home-subject-link b{font-size:12px;color:#597e92;white-space:nowrap}.home-subject-link:hover,.home-subject-link:focus-visible{padding-left:8px;color:#267a55;background:#f2f9ee;outline:0}.home-subject-science{color:#4e7f42}.home-subject-english{color:#8b6b3d}
@media(max-width:980px){.home-course-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:660px){.home-intro{grid-template-columns:1fr;min-height:0;padding:27px 23px}.home-intro h2{font-size:38px}.home-intro p{font-size:15px}.home-intro-art{min-height:150px;max-height:180px}.home-art-circle{width:210px}.home-art-circle svg{max-height:170px}.home-art-sun{width:45px;height:45px;font-size:27px}.home-course-grid{grid-template-columns:1fr;gap:11px}.home-course-card{min-height:0;padding:17px}.home-course-top{margin-bottom:11px}.home-course-gateway .section-head h2{font-size:25px}}

/* Give comparison objects room to be counted, including on small screens. */
.compare-picture-groups{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px;width:100%;max-width:620px;margin:0 auto}
.compare-picture-group{min-width:0;padding:14px 16px;border:2px solid #d8e8f3;border-radius:17px;background:#f9fcff}
.compare-picture-group b{display:block;margin-bottom:9px;color:#556b8b;font-size:clamp(22px,3vw,30px);line-height:1.2}
.compare-picture-group svg{display:block;width:100%;height:auto;max-height:185px;margin:auto}
@media(max-width:500px){.compare-picture-groups{gap:8px}.compare-picture-group{padding:10px 8px}.compare-picture-group svg{max-height:150px}}