:root{--bg:#FAF7F0;--surface:#F0E8DA;--surface2:#F7F0E5;--paper:#FFFEFA;--border:#DCCDB8;--taupe:#A3917B;--text:#40372F;--muted:#786E62;--sage:#87917A;--sage-dark:#64715D;--sage-soft:#E8EEE3;--apricot:#F0D7C0;--sky:#DDE7E8;--lavender:#E7E2ED;--shadow:0 10px 30px rgba(68,53,34,.045);--radius:24px;font-family:"Nunito Sans","DM Sans",system-ui,-apple-system,"Segoe UI",sans-serif;color:var(--text);background:var(--bg);font-synthesis:none}
*{box-sizing:border-box}html{min-height:100%;scroll-behavior:smooth}body{margin:0;min-width:320px;min-height:100vh}button,input,select,textarea{font:inherit}button{cursor:pointer;color:inherit}button:disabled{cursor:not-allowed;opacity:.5}a{color:inherit}button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid #9cae94;outline-offset:3px}p,h1,h2,h3,h4{margin-top:0}h1,h2,h3{letter-spacing:-.04em}h1{font-size:clamp(31px,4.8vw,48px);line-height:1.17}h2{font-size:clamp(23px,3.3vw,30px);line-height:1.23}h3{font-size:18px;line-height:1.3}p{line-height:1.6}small{color:var(--muted)}.app-shell{max-width:1110px;padding:0 24px;margin:0 auto;min-height:100dvh;display:flex;flex-direction:column}.app-header{height:89px;display:flex;align-items:center;justify-content:space-between;gap:20px;border-bottom:1px solid rgba(220,205,184,.7)}.brand{display:flex;align-items:center;gap:12px;font-size:22px;font-weight:800;letter-spacing:-.05em}.logo{display:grid;grid-template-columns:repeat(2,14px);grid-template-rows:repeat(2,14px);gap:4px;transform:rotate(-7deg)}.logo span{border-radius:5px;background:#849078}.logo span:nth-child(2){background:#E6C6A6;border-radius:50%}.logo span:nth-child(3){background:#C6B5A0}.logo span:nth-child(4){background:#B4BFA9;border-radius:50%}.brand small{font-size:10px;font-weight:800;letter-spacing:.22em;color:var(--taupe);display:block;line-height:1.1}.header-actions{display:flex;align-items:center;gap:10px}.pill-plain{border:1px solid var(--border);background:var(--paper);border-radius:50px;display:flex;align-items:center;gap:9px;padding:10px 15px;font-size:13px;font-weight:750}.avatar{width:28px;height:28px;background:var(--apricot);border-radius:50%;display:grid;place-items:center;color:#81583C;font-weight:900}.header-icon{width:43px;height:43px;display:grid;place-items:center;border:1px solid var(--border);border-radius:15px;background:var(--paper)}.header-icon svg{width:18px;height:18px}.main-content{width:100%;flex:1;padding-top:30px;padding-bottom:104px}.mobile-nav{position:sticky;bottom:0;display:none;align-items:center;justify-content:space-around;background:rgba(250,247,240,.97);backdrop-filter:blur(14px);border-top:1px solid var(--border);padding:9px 8px calc(9px + env(safe-area-inset-bottom));z-index:12;margin:0 -24px}.mobile-nav button{border:0;background:none;padding:8px 6px;display:flex;align-items:center;flex-direction:column;gap:5px;font-size:10.5px;font-weight:700;color:var(--muted);min-width:70px}.mobile-nav button.active{color:var(--sage-dark)}.mobile-nav button svg{width:21px;height:21px}.desktop-nav{display:flex;gap:5px;margin-left:auto;margin-right:16px}.desktop-nav button{border:0;background:none;padding:12px 15px;color:var(--muted);font-size:13px;font-weight:750;border-radius:14px}.desktop-nav button.active{background:var(--surface);color:var(--text)}.eyebrow{text-transform:uppercase;font-size:10.5px;font-weight:850;letter-spacing:.20em;color:var(--sage-dark);margin:0 0 13px}.muted{color:var(--muted)}.hero{min-height:264px;border-radius:31px;background:var(--surface);border:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:38px 45px 38px 45px;overflow:hidden;gap:10px;position:relative}.hero h1{max-width:620px;margin:0 0 11px}.hero .sub{max-width:465px;margin:0 0 24px;font-size:14px;color:#716658}.hero-art{width:255px;height:210px;flex-shrink:0;position:relative}.art-circle{position:absolute;border:2px solid #b4bda8;border-radius:50%;width:142px;height:142px;top:22px;left:53px}.art-cube{position:absolute;width:89px;height:89px;border-radius:21px;background:#E6C6A7;transform:rotate(-17deg);left:18px;top:56px;box-shadow:15px 15px 0 rgba(226,184,145,.28)}.art-disc{position:absolute;width:88px;height:88px;border-radius:50%;background:#AAB79E;right:18px;top:78px}.art-small{position:absolute;width:36px;height:36px;border:3px solid #AC9681;transform:rotate(20deg);right:30px;top:16px;border-radius:8px}.art-numeral{position:absolute;left:102px;top:54px;font-weight:900;font-size:70px;color:#4E5141;transform:rotate(4deg)}.btn{min-height:47px;border:1px solid var(--border);background:var(--paper);border-radius:15px;padding:11px 17px;font-size:14px;font-weight:800;display:inline-flex;align-items:center;justify-content:center;gap:9px;transition:transform .12s,background .12s}.btn:active{transform:scale(.98)}.btn svg{height:18px;width:18px;flex-shrink:0}.btn.primary{background:var(--sage-dark);color:white;border-color:var(--sage-dark)}.btn.primary:hover{background:#53634e}.btn.ghost{background:transparent}.btn.soft{background:var(--sage-soft);border-color:#D5DECF;color:#53634e}.btn.full{width:100%}.btn.small{padding:8px 13px;min-height:37px;font-size:12px;border-radius:12px}.btn.no-border{border:0}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:14px;margin-bottom:18px}.section-heading h2{font-size:23px;margin:0}.section-heading p{font-size:13px;margin:5px 0 0;color:var(--muted)}.section-link{border:0;background:none;color:var(--sage-dark);font-weight:850;white-space:nowrap;font-size:13px}.section{margin-top:33px}.feature-grid{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:18px}.card{background:var(--paper);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px}.feature-card{display:flex;gap:20px;justify-content:space-between;align-items:center;min-height:187px}.feature-card h3{font-size:23px;margin:8px 0 8px}.feature-card p{font-size:13px;color:var(--muted);max-width:335px;margin-bottom:17px}.feature-icon{width:92px;height:92px;border-radius:24px;display:grid;place-items:center;background:var(--sage-soft);flex-shrink:0}.feature-icon svg{width:50px;height:50px;color:var(--sage-dark)}.stat-card{display:flex;flex-direction:column;justify-content:center}.stat-card .large{font-size:29px;font-weight:900;letter-spacing:-.04em}.stat-card small{display:block;margin-top:2px}.horizontal-lesson-list,.lesson-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.lesson-tile{width:100%;background:var(--paper);border:1px solid var(--border);padding:19px;text-align:left;border-radius:22px;min-height:162px;display:flex;flex-direction:column;align-items:flex-start;gap:10px;transition:transform .12s,border-color .12s}.lesson-tile:hover{transform:translateY(-2px);border-color:#a3ae9b}.lesson-tile .title{font-size:16px;font-weight:850;letter-spacing:-.02em}.lesson-tile .desc{font-size:12px;color:var(--muted);line-height:1.5}.tile-top{width:100%;display:flex;align-items:center;justify-content:space-between}.tile-icon{width:52px;height:52px;display:grid;place-items:center;border-radius:16px;background:var(--sage-soft)}.tile-icon svg{width:27px;height:27px}.tile-icon.apricot{background:#FAE9D8;color:#9B7656}.tile-icon.sky{background:#E4EDF0;color:#6C858B}.tile-icon.lavender{background:var(--lavender);color:#777086}.tile-icon.sage{background:var(--sage-soft);color:var(--sage-dark)}.status-dot{width:9px;height:9px;border-radius:50%;display:inline-block;background:#d3c8bc}.status-dot.developing{background:#C89967}.status-dot.progress{background:#9BA78D}.status-dot.mastered{background:#61795A}.mini-label{font-size:11px;font-weight:800;color:var(--muted)}.overview-strip{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--muted);margin-top:20px}.overview-strip span{background:var(--surface2);border:1px solid var(--border);padding:7px 12px;border-radius:50px}.page-head{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;margin-bottom:22px}.page-head h1{font-size:34px;margin:0 0 5px}.page-head p{color:var(--muted);font-size:14px;margin:0}.level-head{display:flex;align-items:center;gap:13px;margin:27px 0 15px}.level-num{width:38px;height:38px;border-radius:12px;background:var(--surface);border:1px solid var(--border);display:grid;place-items:center;font-weight:900}.level-head h3{margin:0;font-size:18px}.level-head p{margin:0;font-size:12px;color:var(--muted)}.lesson-tile .prereq{color:#826B58;font-size:11px;line-height:1.4}.row{display:flex;align-items:center;gap:12px}.spread{justify-content:space-between}.flex-wrap{flex-wrap:wrap}.progress-track{height:8px;background:#E8DFD2;border-radius:20px;overflow:hidden;width:100%}.progress-track>div{height:100%;border-radius:inherit;background:var(--sage-dark);transition:width .25s}.two-column{display:grid;grid-template-columns:1fr 1fr;gap:18px}.three-column{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.field{display:flex;flex-direction:column;gap:7px;margin-bottom:17px}.field label{font-size:12px;font-weight:850}.field input,.field select,.field textarea{width:100%;min-height:47px;border:1px solid var(--border);border-radius:14px;background:#fffdf7;padding:11px 14px;color:var(--text);font-size:14px}.field textarea{min-height:90px;resize:vertical}.field-hint{color:var(--muted);font-size:11px}.form-error{background:#F9E9E4;color:#8F4B43;padding:10px 13px;border-radius:12px;font-size:12px;margin-bottom:12px}.welcome{max-width:850px;margin:24px auto 0}.welcome-hero{background:var(--surface);border-radius:26px;padding:28px 30px;border:1px solid var(--border);margin-bottom:20px}.welcome-hero h1{margin-bottom:8px}.welcome-hero p{color:var(--muted);max-width:590px}.onboard-form{padding:28px}.toggle-line{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 0;border-bottom:1px solid #ece3d7}.toggle-line:last-child{border:0}.toggle-line strong{font-size:13px}.toggle-line small{font-size:11px}.toggle-switch{position:relative;width:48px;height:28px;border-radius:30px;background:#D5CBBF;border:1px solid #cbbdb0;transition:background .15s;flex-shrink:0}.toggle-switch:after{content:"";position:absolute;top:3px;left:3px;height:20px;width:20px;background:#fff;border-radius:50%;transition:transform .15s}.toggle-switch.on{background:var(--sage-dark)}.toggle-switch.on:after{transform:translateX(20px)}.modal-backdrop{position:fixed;inset:0;background:rgba(45,39,32,.35);display:flex;justify-content:center;align-items:center;z-index:40;padding:17px;backdrop-filter:blur(3px)}.modal{width:min(100%,440px);max-height:90dvh;overflow:auto;background:var(--bg);padding:29px;border-radius:28px;box-shadow:0 23px 80px rgba(38,27,13,.2)}.modal h2{font-size:24px;margin:10px 0 8px}.modal p{font-size:13px;color:var(--muted)}.modal-close{float:right;min-width:36px;height:36px;border:1px solid var(--border);background:white;border-radius:12px;font-size:20px}.modal .icon-bubble{width:52px;height:52px;border-radius:15px;background:var(--surface);display:grid;place-items:center}.modal .icon-bubble svg{width:24px;height:24px}.modal-footer{display:flex;gap:10px;margin-top:19px}.pin-input{text-align:center;font-weight:850;letter-spacing:.45em;font-size:25px!important}.profile-option{width:100%;text-align:left;display:flex;align-items:center;gap:12px;padding:13px;border:1px solid var(--border);border-radius:15px;background:var(--paper);margin-bottom:10px}.profile-option.selected{border-color:var(--sage-dark);background:var(--sage-soft)}.profile-option .avatar{width:39px;height:39px}.lesson-top{max-width:850px;margin:0 auto}.lesson-back{border:0;background:none;font-size:13px;font-weight:800;display:flex;align-items:center;gap:7px;padding:8px 0 18px}.lesson-progress{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;margin-bottom:19px}.lesson-progress .step{height:6px;border-radius:10px;background:#E7DCCF}.lesson-progress .step.done{background:#8E9D84}.lesson-progress .step.current{background:#C7A888}.stage-mark{font-size:11px;letter-spacing:.14em;color:var(--sage-dark);font-weight:900;text-transform:uppercase}.lesson-card{padding:30px;max-width:850px;margin:0 auto}.lesson-card h1{font-size:clamp(25px,4vw,36px);line-height:1.24;margin:10px 0 8px}.lesson-card .instruction{font-size:14px;color:var(--muted);margin-bottom:0}.activity-zone{background:#F7F2E9;border:1px dashed #D4C5B1;border-radius:23px;margin:27px 0 16px;min-height:224px;padding:22px;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:15px}.activity-zone .tiny{font-size:11px;color:var(--muted);font-weight:800;letter-spacing:.07em;text-transform:uppercase}.block-zone{width:100%;max-width:530px;display:flex;justify-content:center;align-items:center;flex-wrap:wrap;gap:9px;min-height:90px}.math-block{border:2px solid #77866d;width:45px;height:45px;border-radius:12px;background:#A7B49C;display:inline-grid;place-items:center;user-select:none;touch-action:none;transition:transform .1s,border-color .1s;flex-shrink:0}.math-block:active{transform:scale(.92)}.math-block.alt{background:#EAC9A8;border-color:#C79E75}.math-block.selected{border-color:#516e4d;box-shadow:0 0 0 3px rgba(100,113,93,.18)}.math-block.selected:after{content:'✓';font-weight:900;font-size:18px;color:#fff}.dot{display:inline-block;width:21px;height:21px;background:#91A086;border-radius:50%;margin:5px;flex-shrink:0}.dot.alt{background:#D3AA87}.dot.crossed{background:#CBC3B9;position:relative}.dot.crossed:after{content:'';width:28px;height:2px;background:#8b7b6d;position:absolute;top:9px;left:-4px;transform:rotate(-45deg)}.dot-grid{display:flex;max-width:500px;flex-wrap:wrap;justify-content:center;align-items:center}.math-groups{display:grid;grid-template-columns:1fr 1fr;gap:15px;width:100%;max-width:610px;align-items:stretch}.math-group{background:#FFFDFA;border:1px solid var(--border);border-radius:18px;padding:15px 10px;text-align:center;min-height:142px}.math-group .block-zone{min-height:84px}.math-group .tiny{margin-bottom:11px}.merge-target{width:100%;max-width:610px;min-height:100px;border-radius:18px;background:#E9EEE5;border:2px dashed #A4B29C;display:flex;justify-content:center;align-items:center;flex-wrap:wrap;gap:6px;padding:11px;position:relative}.merge-target .tiny{width:100%;text-align:center}.merge-target.drag-over{border-color:var(--sage-dark);background:#DAE8D8}.counter-text{font-size:13px;font-weight:850;color:var(--sage-dark);margin:0}.answer-choices{display:flex;justify-content:center;flex-wrap:wrap;gap:11px;margin-top:14px}.answer-choices button,.shape-choice,.num-token{min-width:74px;min-height:66px;border-radius:17px;background:#FFFDF9;border:1.5px solid var(--border);padding:8px 13px;font-size:25px;font-weight:900;transition:border-color .13s,background .13s}.answer-choices button.selected,.shape-choice.selected{background:#E5ECE1;border-color:#829878;box-shadow:0 0 0 2px #b9cdb3}.answer-choices button:active,.num-token:active{transform:scale(.97)}.answer-choices button.visual-option{min-height:80px;min-width:100px;display:flex;align-items:center;justify-content:center;flex-wrap:wrap;max-width:170px}.answer-choices button.visual-option .dot{width:13px;height:13px;margin:3px}.pattern-row{display:flex;justify-content:center;gap:10px;align-items:center;flex-wrap:wrap}.pattern-shape{display:inline-block;width:39px;height:39px;background:#AAB79D;border:1.5px solid #81947B;border-radius:50%}.pattern-shape.square{background:#E8C4A2;border-color:#C49A76;border-radius:9px}.pattern-shape.missing{border:2px dashed var(--taupe);background:transparent;border-radius:10px;display:grid;place-items:center;font-size:25px;font-weight:800}.shape-choice{min-width:90px}.shape-choice .pattern-shape{vertical-align:middle}.sequence-shelf{display:flex;justify-content:center;gap:10px;flex-wrap:wrap}.num-token{min-width:59px;min-height:60px}.number-slot{width:65px;height:66px;border:2px dashed #c6b6a1;border-radius:13px;display:grid;place-items:center;font-weight:900;font-size:23px}.number-slot.filled{background:var(--sage-soft);border:1px solid #9BAF96}.bond-diagram{display:flex;flex-direction:column;align-items:center;gap:6px;width:100%}.bond-circle{width:86px;height:86px;display:grid;place-items:center;border-radius:50%;border:2px solid #8DA181;background:var(--sage-soft);font-size:30px;font-weight:900}.bond-branches{display:flex;align-items:center;gap:0;width:170px;height:43px}.bond-branches span{height:2px;width:50%;background:#a99d8b;transform-origin:right}.bond-branches span:first-child{transform:rotate(-22deg)}.bond-branches span:last-child{transform:rotate(22deg);transform-origin:left}.bond-parts{display:flex;gap:52px}.bond-parts span{width:75px;height:75px;border-radius:50%;background:#F7E7D8;border:2px solid #D8B99B;display:grid;place-items:center;font-size:27px;font-weight:900}.bond-parts span.blank{background:white;border-style:dashed}.lesson-toolbar{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:16px;flex-wrap:wrap}.lesson-toolbar .action-buttons{display:flex;gap:10px;margin-left:auto}.feedback{padding:15px 18px;border-radius:17px;margin-top:15px;font-size:13px;display:flex;gap:12px;align-items:flex-start;line-height:1.5;background:#E8EFE3;border:1px solid #C6D6BE}.feedback.try{background:#FAEEE5;border-color:#E7D1BF}.feedback svg{width:20px;height:20px;flex-shrink:0}.help-card{background:#FBF5E6;border:1px solid #E6D9B7;border-radius:17px;padding:13px 16px;margin-top:13px;font-size:13px;line-height:1.65}.help-card strong{display:block;margin-bottom:4px}.lesson-summary{text-align:center;max-width:680px;margin:30px auto}.summary-art{margin:0 auto 20px;display:grid;place-items:center;width:100px;height:100px;border-radius:30px;background:var(--sage-soft);color:var(--sage-dark)}.summary-art svg{height:55px;width:55px}.summary-tags{display:flex;gap:9px;justify-content:center;flex-wrap:wrap;margin:21px 0}.summary-tags span{background:var(--surface);padding:9px 13px;border-radius:12px;font-size:12px}.parent-tabs{display:flex;overflow:auto;gap:8px;padding:5px 0 18px;margin-bottom:12px}.parent-tabs button{white-space:nowrap;border:1px solid var(--border);background:var(--paper);padding:10px 15px;border-radius:12px;font-size:12px;font-weight:800}.parent-tabs button.active{color:#fff;background:var(--sage-dark);border-color:var(--sage-dark)}.insight{border-left:3px solid #A0AA96;padding-left:16px;font-size:14px;line-height:1.7;color:#655C51;margin-top:16px}.metric{padding:20px}.metric .number{font-size:30px;font-weight:900}.metric small{font-weight:700}.competency-row{display:flex;align-items:center;gap:13px;padding:14px 0;border-bottom:1px solid #eee4d8}.competency-row:last-child{border:0}.competency-row .tile-icon{width:40px;height:40px;border-radius:12px;flex-shrink:0}.competency-row .tile-icon svg{width:20px;height:20px}.competency-row .grow{flex:1;min-width:0}.competency-row .grow strong{font-size:13px}.competency-row .grow small{display:block;margin-top:3px;font-size:11px}.status-pill{border-radius:30px;padding:6px 9px;background:#EFE7DC;color:#6D6359;font-size:10.5px;font-weight:800;white-space:nowrap}.status-pill.developing{background:#F5E6D5;color:#8E643D}.status-pill.progress{background:#E9EEE4;color:#58714D}.status-pill.mastered{background:#DCEAD6;color:#46613D}.history-item{display:flex;align-items:flex-start;gap:12px;border-bottom:1px solid #ece3d8;padding:13px 0}.history-item:last-child{border:0}.history-dot{height:10px;width:10px;background:var(--sage);border-radius:50%;flex-shrink:0;margin-top:6px}.history-item small{font-size:11px}.home-card{display:flex;flex-direction:column;gap:9px}.home-card h3{margin:0}.home-card p{font-size:13px;color:var(--muted);margin:0}.home-card .duration{font-size:11px;font-weight:850;color:var(--sage-dark)}.home-card.done{background:#F0F4EB}.domain-tag{font-weight:850;font-size:10px;letter-spacing:.09em;text-transform:uppercase;color:var(--sage-dark)}.warning-text{font-size:12px;color:#8b6556;background:#F6EBDE;padding:12px;border-radius:12px}.assessment-wrap{max-width:700px;margin:25px auto}.assessment-choices{display:flex;flex-wrap:wrap;justify-content:center;gap:11px;margin-top:19px}.assessment-choices button{border:1px solid var(--border);background:white;border-radius:15px;min-width:100px;padding:16px;font-size:22px;font-weight:900}.assessment-choices button:active{background:var(--sage-soft)}.assessment-dots{display:flex;justify-content:center;gap:7px;flex-wrap:wrap;margin:23px 0}.assessment-dots .dot{width:24px;height:24px}.footer-note{text-align:center;color:#9B8F7D;font-size:11px;margin:36px 0 0}.empty-state{text-align:center;padding:42px 17px;color:var(--muted)}.empty-state svg{width:37px;height:37px;margin-bottom:12px}.app-toast{position:fixed;bottom:99px;left:50%;transform:translateX(-50%);border-radius:14px;background:#40372F;color:white;padding:13px 17px;z-index:25;max-width:90vw;font-size:12px;box-shadow:var(--shadow)}.loading-screen{min-height:100vh;display:flex;align-items:center;justify-content:center;flex-direction:column;color:var(--muted)}.brand-symbol{font-size:62px;color:var(--sage)}.hidden{display:none!important}
@media(min-width:1000px){.app-shell{padding:0 33px}.main-content{padding-top:35px}}
@media(max-width:770px){.app-shell{padding:0 16px}.app-header{height:69px}.brand{font-size:19px}.logo{grid-template-columns:repeat(2,12px);grid-template-rows:repeat(2,12px)}.desktop-nav{display:none}.mobile-nav{display:flex;margin:0 -16px}.main-content{padding-top:21px;padding-bottom:38px}.hero{padding:28px 24px;min-height:240px}.hero-art{position:absolute;right:-67px;top:24px;opacity:.50;pointer-events:none;transform:scale(.8)}.hero>div:first-child{z-index:1}.hero h1{font-size:32px;max-width:360px}.hero .sub{max-width:320px}.feature-grid{grid-template-columns:1fr}.feature-card{min-height:164px}.stat-card{min-height:104px}.horizontal-lesson-list,.lesson-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.section{margin-top:26px}.page-head h1{font-size:30px}.two-column,.three-column{grid-template-columns:1fr 1fr}.lesson-card{padding:21px}.activity-zone{padding:15px;min-height:210px}.header-actions{gap:6px}.pill-plain{padding:7px 10px}.pill-plain .profile-text{display:none}.hero .sub{font-size:13px}}
@media(max-width:480px){.hero{min-height:260px;padding:28px 22px}.hero h1{font-size:30px;max-width:290px}.hero .sub{max-width:270px}.hero-art{right:-111px;top:37px;opacity:.34}.card{padding:19px}.feature-card h3{font-size:21px}.feature-icon{width:67px;height:67px;border-radius:20px}.feature-icon svg{width:39px;height:39px}.lesson-tile{min-height:161px;padding:15px}.lesson-tile .title{font-size:14px}.lesson-tile .desc{font-size:11px}.tile-icon{width:46px;height:46px}.section-heading h2{font-size:20px}.two-column,.three-column{grid-template-columns:1fr}.lesson-card{padding:16px}.lesson-card h1{font-size:25px}.math-group{padding:11px 7px;min-height:125px}.math-block{height:37px;width:37px;border-radius:10px}.block-zone{gap:6px}.math-group .block-zone{min-height:90px}.activity-zone{margin-top:20px;padding:13px}.answer-choices button{min-width:65px;min-height:63px}.lesson-toolbar{align-items:stretch}.lesson-toolbar .action-buttons{width:100%;margin-left:0}.lesson-toolbar .action-buttons .btn{flex:1}.parent-tabs{margin-right:-15px}.modal{padding:23px}.assessment-wrap{margin:8px auto}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
/* Keep primary navigation within reach on small screens. */
@media(max-width:770px){.mobile-nav{position:fixed;left:0;right:0;bottom:0;margin:0;width:100%;box-shadow:0 -4px 24px rgba(70,53,32,.035)}.main-content{padding-bottom:110px}}