@layer reset,base,components;
@layer reset{*{box-sizing:border-box}body,h1,h2,h3,p{margin:0}button,input,select,textarea{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer}img,svg{max-width:100%}}
@layer base{:root{--ink:#173d3a;--muted:#64726c;--paper:#f7f7ef;--white:#fff;--line:#dfe5da;--lime:#d9ef91;--radius:24px}body{background:var(--paper);color:var(--ink);font:16px/1.6 'Trebuchet MS',Arial,sans-serif}a{color:inherit;text-decoration:none}button{color:inherit}a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #3b736f;outline-offset:4px}h1,h2,h3{line-height:1.16;letter-spacing:-.04em}h1{font-size:clamp(36px,5vw,65px)}h2{font-size:clamp(25px,3vw,36px)}h3{font-size:21px}p+p{margin-top:14px}p{max-width:72ch}button:disabled{cursor:default;opacity:.6}svg.icon{width:22px;height:22px;flex-shrink:0;vertical-align:middle;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}::selection{background:#d9ef91}.skip{position:fixed;top:-100px;left:20px;z-index:100;padding:12px;background:white}.skip:focus{top:10px}main{min-height:70vh}small,.small{font-size:13px}.muted{color:var(--muted)}.eyebrow{text-transform:uppercase;letter-spacing:.14em;font-size:11px;font-weight:800;color:#58765b}.wrap{max-width:1240px;padding:0 36px;margin:auto}.row{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.between{justify-content:space-between}.stack{display:grid;gap:20px}.gap-sm{gap:10px}.mt{margin-top:28px}.section{padding:38px 0}.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:24px}.section-head p{margin-top:8px}.grid{display:grid;gap:20px}.grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.narrow{max-width:860px;margin:auto}.hidden{display:none!important}.mint{--tint:#e5eedb;--accent:#40634c}.peach{--tint:#f9e0cd;--accent:#996349}.lavender{--tint:#e9e4f6;--accent:#72629a}.yellow{--tint:#f5edc9;--accent:#8f7731}.blue{--tint:#dcecf0;--accent:#497782}.pink{--tint:#f4e0e6;--accent:#996175}}
@layer components{
.topbar{height:92px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);gap:22px}.brand{display:flex;align-items:center;gap:11px;font-weight:800;font-size:24px;letter-spacing:-1px;white-space:nowrap}.brand img{width:40px;height:40px;border-radius:11px}.desktop-nav{display:flex;gap:27px;font-size:14px;font-weight:600;align-items:center}.desktop-nav a{padding:12px 0;color:#6c7771}.desktop-nav a.active{color:var(--ink);box-shadow:0 2px var(--ink)}.top-actions{display:flex;gap:10px}.pill{border:1px solid var(--line);border-radius:50px;padding:8px 13px;background:white;font-size:12px;font-weight:700}.icon-button{display:inline-flex;align-items:center;justify-content:center;width:43px;height:43px;border:1px solid var(--line);border-radius:50%;background:transparent}.button{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:48px;border:1px solid var(--ink);border-radius:12px;padding:12px 20px;font-weight:700;font-size:14px;background:var(--ink);color:white;transition:transform .2s,box-shadow .2s}.button:hover{transform:translateY(-2px);box-shadow:0 5px 14px #173d3a12}.button.secondary{background:transparent;color:var(--ink);border-color:#cbd7c9}.button.light{background:white;color:var(--ink);border-color:var(--line)}.text-link{display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:14px;border:0;background:none;padding:10px 0;text-decoration:underline;text-underline-offset:5px}.hero{display:grid;grid-template-columns:1.12fr 1fr;gap:30px;align-items:center;padding:58px 0 40px}.hero h1{margin:20px 0 22px;line-height:1.08;max-width:620px}.hero h1 em{font-style:normal;color:#598257;position:relative}.hero .intro{font-size:18px;line-height:1.7;max-width:470px;color:var(--muted)}.hero-actions{display:flex;gap:13px;flex-wrap:wrap;margin:26px 0 20px}.tag{display:inline-flex;align-items:center;gap:7px;font-size:12px;letter-spacing:.02em;font-weight:700}.tag .dot{width:7px;height:7px;border-radius:50%;background:#689766}.hero-art{position:relative;min-height:390px;display:grid;place-items:center}.hero-art>svg{width:100%;height:390px}.floating{position:absolute;display:flex;align-items:center;gap:10px;background:#fffefa;border:1px solid #dde2d5;box-shadow:0 9px 24px #173d3a0a;padding:12px 17px;border-radius:14px;font-size:13px}.floating.one{left:0;top:40px;transform:rotate(-5deg)}.floating.two{right:0;bottom:45px;transform:rotate(4deg)}.floating .icon{color:#54845e}.trust-strip{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:17px 0;display:flex;gap:18px;justify-content:space-between;flex-wrap:wrap;font-size:13px;color:#65736b}.trust-strip span{display:flex;align-items:center;gap:9px}.trust-strip .icon{width:18px}.card{min-width:0;overflow-wrap:anywhere;border:1px solid var(--line);border-radius:var(--radius);background:#fffefa;padding:26px}.module-card{position:relative;overflow:hidden;background:var(--tint);border:1px solid #173d3a0b;min-height:236px;display:flex;flex-direction:column;transition:transform .2s}.module-card:hover{transform:translateY(-4px)}.module-card .module-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px}.module-card .module-head>.icon{width:36px;height:36px;color:var(--accent)}.number{color:var(--accent);opacity:.65;font:700 13px/1 Arial;letter-spacing:.12em}.module-card p{margin:12px 0 22px;color:#52665c;font-size:14px;max-width:32ch}.module-card footer{display:flex;align-items:center;justify-content:space-between;margin-top:auto;font-size:12px;font-weight:700}.arrow-circle{display:grid;place-items:center;width:34px;height:34px;border:1px solid #173d3a30;border-radius:50%}.daily{display:grid;grid-template-columns:auto 1fr auto;gap:24px;align-items:center;background:var(--ink);color:#fff;border-radius:24px;padding:30px;margin-top:24px}.daily .button{background:var(--lime);color:var(--ink);border:0}.daily p{color:#d8e2d8;font-size:14px;margin-top:6px}.daily .eyebrow{color:var(--lime)}.daily>.icon{width:45px;height:45px;color:var(--lime)}.purpose-card{border-radius:18px;padding:20px;border:1px solid var(--line);background:white;display:flex;align-items:start;gap:15px}.purpose-card:hover{border-color:#557a60}.purpose-card .icon{color:#608560;margin-top:3px}.purpose-card h3{font-size:17px;letter-spacing:-.02em}.purpose-card p{font-size:13px;color:var(--muted);margin-top:5px}.teacher-banner{border-radius:26px;background:#eee9de;padding:36px;display:flex;align-items:center;justify-content:space-between;gap:24px}.teacher-banner h2{margin:8px 0 12px}.footer{padding:38px 0 110px;border-top:1px solid var(--line);margin-top:40px;display:flex;justify-content:space-between;align-items:start;gap:25px;color:var(--muted);font-size:12px}.footer-links{display:flex;gap:18px;flex-wrap:wrap}.mobile-nav{display:none}.page-intro{padding:38px 0 25px}.page-intro h1{font-size:42px;margin:12px 0}.page-intro p{color:var(--muted)}.tabs{display:flex;gap:8px;overflow:auto;padding:8px 0 18px}.tab{white-space:nowrap;border-radius:40px;padding:10px 16px;border:1px solid var(--line);background:white;font-size:13px;font-weight:700}.tab.active{background:var(--ink);color:white;border-color:var(--ink)}.progress{width:100%;height:7px;border-radius:9px;background:#e2e8dc;overflow:hidden;appearance:none;border:0}.progress::-webkit-progress-bar{background:#e2e8dc;border-radius:9px}.progress::-webkit-progress-value{background:#608560;border-radius:9px}.progress::-moz-progress-bar{background:#608560}.lesson-list{display:grid;gap:10px;margin-top:22px}.lesson-row{display:flex;align-items:center;gap:15px;border:1px solid var(--line);border-radius:16px;padding:18px;background:white;transition:border .2s}.lesson-row:hover{border-color:#5c7d60}.lesson-row>div:nth-child(2){flex:1}.lesson-row h3{font-size:17px;letter-spacing:-.02em}.lesson-row p{font-size:13px;margin-top:4px;color:var(--muted)}.lesson-index{width:38px;height:38px;background:var(--tint,#e8eee1);display:grid;place-items:center;border-radius:50%;font-weight:700}.done .lesson-index{background:#d8eccb}.lesson-top{display:flex;justify-content:space-between;align-items:center;gap:14px;margin:25px 0}.lesson-body{padding:38px;min-height:390px}.lesson-body h1{font-size:35px;margin:16px 0 22px}.lesson-body h2{font-size:28px;margin:14px 0 20px}.lesson-body .lead{font-size:20px;line-height:1.7}.callout{border-left:4px solid #8ba878;background:#edf3e6;padding:18px 20px;margin:24px 0;border-radius:0 14px 14px 0}.callout.warning{background:#fbefdc;border-color:#b5893c}.callout p{font-size:14px;margin-top:5px}.compare{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:25px 0}.compare>div{padding:22px;border-radius:16px;background:#f8eee7}.compare>div+div{background:#e8f0e0}.compare strong{font-size:12px;letter-spacing:.07em;display:block;margin-bottom:12px}.choices{display:grid;gap:12px;margin:25px 0}.choice{width:100%;text-align:left;padding:17px 20px;background:white;border:1px solid #dce3d7;border-radius:13px;display:flex;gap:12px;align-items:center}.choice:hover:not(:disabled){border-color:#69865c;background:#f7faef}.choice.correct{background:#e0efd6;border-color:#73985e}.choice.incorrect{background:#fbe4de;border-color:#c78d7b}.choice .letter{display:grid;place-items:center;flex-shrink:0;border:1px solid #d1dccc;border-radius:8px;width:28px;height:28px;font-size:12px;font-weight:700}.feedback{padding:18px;border-radius:14px;background:#edf3e6}.feedback p{margin-top:6px;font-size:14px}.feedback.retry{background:#fcf0de}.lesson-bottom{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-top:28px}.field{display:block;margin:0 0 20px}.field>span{display:block;font-weight:700;font-size:14px;margin-bottom:8px}input,select,textarea{width:100%;border:1px solid #d5decf;border-radius:12px;padding:13px 15px;background:white;color:var(--ink);min-height:48px}textarea{resize:vertical;min-height:130px;line-height:1.6}.field small{display:block;color:var(--muted);margin-top:6px}.check{display:flex;align-items:flex-start;gap:12px;margin:14px 0;cursor:pointer}.check input{width:19px;height:19px;min-height:0;margin-top:4px;accent-color:var(--ink)}.output{white-space:pre-wrap;background:#173d3a;color:#eef3e6;border-radius:18px;padding:25px;line-height:1.8;overflow-wrap:anywhere;min-height:120px}.stat{background:white;border:1px solid var(--line);border-radius:20px;padding:24px}.stat strong{display:block;font-size:35px;line-height:1.2}.stat span{font-size:13px;color:var(--muted)}.module-progress{display:grid;gap:12px}.module-progress .row{margin-bottom:6px}.badge{border:1px solid var(--line);border-radius:16px;padding:20px;background:#f2f4ed}.badge.earned{background:#e3eed8;border-color:#bacdad}.badge .icon{width:28px;height:28px;margin-bottom:10px}.badge h3{font-size:17px}.search{max-width:500px;margin:20px 0}.term-card h3{font-size:20px}.term-card p{font-size:14px;margin:12px 0}.terms{align-items:start}.lab-tiles{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.lab-tile{padding:24px;background:var(--tint);border:0;border-radius:20px;text-align:left;min-height:170px}.lab-tile h3{margin:16px 0 8px}.lab-tile p{font-size:13px}.lab-layout{display:grid;grid-template-columns:1fr 1fr;gap:24px}.lab-title{margin:20px 0}.timeline{list-style:none;padding:0;margin:20px 0}.timeline li{padding:14px 0 14px 26px;border-left:2px solid #c6d9b9;position:relative;font-size:14px}.timeline li:before{content:'';position:absolute;left:-6px;top:20px;width:10px;height:10px;border-radius:50%;background:#709668}.timeline li:last-child{font-weight:700}.order-item{display:flex;gap:14px;align-items:center;padding:12px 16px;background:#f2f4ec;border:1px solid var(--line);border-radius:12px;margin:10px 0}.order-item>span{flex:1}.order-item button{min-width:42px;min-height:42px;background:white;border:1px solid var(--line);border-radius:9px}.modal-backdrop{position:fixed;inset:0;z-index:50;background:#183a3466;backdrop-filter:blur(4px);display:grid;place-items:center;padding:20px;overflow:auto}.modal{position:relative;background:var(--paper);border-radius:26px;padding:32px;max-width:690px;width:100%;max-height:90vh;overflow:auto}.modal h2{margin:12px 0}.modal .close{position:absolute;right:18px;top:18px}.choice-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:22px 0}.choice-grid .choice{height:100%;font-size:14px}.choice.selected{background:#e1edcf;border-color:#7d9e66}.empty{padding:45px;text-align:center;background:#eef2e6;border-radius:24px}.empty .icon{width:45px;height:45px;margin-bottom:15px}.empty p{margin:15px auto 22px}.sheet{background:white;border:1px solid var(--line);padding:32px;border-radius:20px}.sheet h2{margin:14px 0}.writing-lines{min-height:110px;background:repeating-linear-gradient(transparent,transparent 33px,#d7dfd0 34px);margin:15px 0 30px}.board .sheet{font-size:23px}.board .sheet h2{font-size:38px}.sharebox{display:flex;gap:10px;margin:20px 0}.sharebox input{font-size:13px}.legal{max-width:800px}.legal h2{font-size:23px;margin:28px 0 12px}.legal ul{padding-left:22px}.install-tip{font-size:13px;color:var(--muted)}#toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%);max-width:90vw;padding:12px 20px;border-radius:12px;background:var(--ink);color:white;z-index:100;box-shadow:0 7px 30px #173d3a22;opacity:0;pointer-events:none;transition:opacity .2s}#toast.show{opacity:1}.calm .hero-art,.calm .floating{animation:none}.calm .hero-art{opacity:.8}.calm .module-card{background:#f0f2ea}.offline-note{font-size:12px;background:#f4e7ce;padding:8px;text-align:center}.statusline{font-size:12px;color:#61745e;margin-top:10px}.print-only{display:none}.danger{color:#984832;border-color:#cfb7ac!important}.source-list a{text-decoration:underline;text-underline-offset:4px}.completion-mark{margin:15px auto;width:74px;height:74px;background:#dfedcb;border-radius:50%;display:grid;place-items:center}.completion-mark .icon{width:38px;height:38px}.art-star{transform-origin:center;animation:drift 6s ease-in-out infinite}.hero-art .orbit{animation:drift 8s ease-in-out infinite}.caption{letter-spacing:.1em;text-transform:uppercase;font-size:10px;color:#637762}@keyframes drift{50%{transform:translateY(-7px)}}
@media(min-width:1000px){.module-card:nth-child(2){transform:translateY(8px)}.module-card:nth-child(2):hover{transform:translateY(4px)}}
@media(max-width:1050px){.desktop-nav{gap:16px}.topbar .pill{display:none}.hero{gap:0}.hero-art{min-height:340px}.hero-art>svg{height:340px}.floating{font-size:11px;padding:10px}.wrap{padding:0 25px}.grid.three{gap:14px}}
@media(max-width:760px){.wrap{padding:0 20px}.topbar{height:76px}.desktop-nav{display:none}.brand{font-size:22px}.brand img{width:36px;height:36px}.top-actions .button{min-height:40px;padding:8px 13px;font-size:12px}.hero{grid-template-columns:1fr;padding:35px 0 22px}.hero h1{font-size:44px;max-width:440px;margin:17px 0}.hero .intro{font-size:16px;max-width:44ch}.hero-art{min-height:280px;margin-top:10px}.hero-art>svg{height:280px}.floating.one{top:18px;left:8px}.floating.two{bottom:13px;right:8px}.trust-strip{gap:12px;font-size:11px;justify-content:start}.trust-strip span{width:46%;gap:6px}.section{padding:26px 0}.grid.three,.grid.two{grid-template-columns:1fr}.grid.purpose-grid{grid-template-columns:1fr 1fr}.module-card{min-height:200px}.module-card .module-head{margin-bottom:15px}.module-card p{max-width:45ch;margin-bottom:16px}.section-head{align-items:start}.section-head h2{font-size:27px}.section-head .text-link{font-size:12px;white-space:nowrap}.daily{grid-template-columns:1fr;padding:25px;gap:15px}.daily>.icon{display:none}.daily .button{justify-self:start}.teacher-banner{padding:25px;align-items:start;flex-direction:column}.footer{flex-direction:column;margin-top:20px;padding-bottom:110px}.mobile-nav{position:fixed;z-index:20;bottom:0;left:0;right:0;display:flex;justify-content:space-around;align-items:center;background:#fffefaf2;backdrop-filter:blur(12px);border-top:1px solid var(--line);padding:9px 6px max(10px,env(safe-area-inset-bottom));height:auto}.mobile-nav a{font-size:10px;display:flex;align-items:center;flex-direction:column;gap:3px;min-width:60px;min-height:45px;color:#7b857c}.mobile-nav a.active{color:var(--ink);font-weight:800}.mobile-nav a.active .icon{background:#e4edda;border-radius:8px;box-sizing:content-box;padding:3px;margin:-3px}.page-intro h1{font-size:35px}.lesson-body{padding:23px}.lesson-body h1{font-size:29px}.lesson-body .lead{font-size:17px}.compare{grid-template-columns:1fr}.lesson-bottom{flex-wrap:wrap}.lesson-bottom .button{flex:1}.lab-layout{grid-template-columns:1fr}.lab-tiles{grid-template-columns:1fr 1fr}.lab-tile{padding:18px;min-height:160px}.lab-tile h3{font-size:18px}.purpose-card{padding:15px;gap:9px;flex-direction:column}.purpose-card h3{font-size:16px}.modal{padding:25px 20px}.modal h2{font-size:27px;padding-right:24px}.choice-grid{grid-template-columns:1fr}.choice{font-size:14px}.stat strong{font-size:29px}.stats-grid{grid-template-columns:repeat(3,1fr)!important;gap:8px}.stat{padding:16px}.stat span{font-size:11px}.sheet{padding:22px}.sharebox{flex-wrap:wrap}#toast{bottom:87px}.empty{padding:30px 20px}.board .sheet{font-size:20px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
@media print{body{background:white;color:#172f29;font-size:12pt}.topbar,.mobile-nav,.footer,.no-print,.skip,#toast,.modal-backdrop{display:none!important}.wrap,.narrow{max-width:none;padding:0}.section{padding:0}.sheet{border:0;padding:15px}.print-only{display:block}.page-intro{padding:0 0 15px}.page-intro h1{font-size:23pt}.board .sheet{font-size:12pt}.writing-lines{break-inside:avoid}.card{break-inside:avoid}.button,.tabs{display:none}.teacher-controls{display:none}.grid{display:block}.card{margin-bottom:20px}a[href^='http']:after{content:' (' attr(href) ')';font-size:9pt}.footer-links a:after{content:''}}
}