@font-face{font-family:Manrope;src:url('/assets/manrope-latin.ttf') format('truetype');font-style:normal;font-weight:200 800;font-display:swap}
:root{--ink:#17382f;--green:#24694f;--paper:#fbfcfa;--sage:#edf3e9;--yellow:#f7dc73;--muted:#5c6b63;--line:#dce5dc;--white:#fff;--radius:16px;font-family:Manrope,'Segoe UI',sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none;scroll-behavior:smooth;scroll-padding-top:100px}
*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button,a,input,summary,select{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}button{cursor:pointer}a{color:inherit;text-decoration:none}button{color:inherit}svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #b17d00;outline-offset:5px}button:disabled{cursor:default}p{line-height:1.75;color:var(--muted)}h1,h2,h3,p{margin-top:0}h1,h2,h3{font-weight:650}h2{font-size:clamp(32px,3.1vw,46px);line-height:1.18;letter-spacing:-1.8px}h3{letter-spacing:-.6px}section{scroll-margin-top:90px}.wrap{max-width:1240px;margin:0 auto;padding-left:40px;padding-right:40px}.section{padding-top:100px;padding-bottom:92px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}.skip-link{position:fixed;top:-60px;left:16px;z-index:1000;padding:12px;background:var(--yellow)}.skip-link:focus{top:12px}.header{height:91px;background:rgba(251,252,250,.97);border-bottom:1px solid #e8ece6;position:sticky;top:0;z-index:20}.nav{height:100%;display:flex;align-items:center;justify-content:space-between;gap:28px}.brand{display:inline-flex;align-items:center;gap:10px;font-size:25px;letter-spacing:-1.2px;font-weight:800;flex-shrink:0}.brand-dot{color:var(--green)}.nav nav{display:flex;align-items:center;gap:28px;font-size:13px;font-weight:600}.nav nav>a{display:flex;align-items:center;gap:7px;padding:12px 0}.nav nav>a:hover,.quiet-link:hover,.footer-links a:hover{color:var(--green);text-decoration:underline;text-underline-offset:5px}.tiny-dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:#4b8059;flex-shrink:0}.text-btn{border:0;background:none;display:flex;align-items:center;gap:12px;font-size:13px;font-weight:650;padding:10px 0}.text-btn svg{width:19px}.menu-btn{display:none;padding:10px;border:0;background:none}.menu-btn span{display:block;width:23px;height:2px;background:var(--ink);margin:6px 0}.hero{display:grid;grid-template-columns:1.05fr 1fr;gap:32px;padding-top:66px;padding-bottom:77px;align-items:center;min-height:678px}.release-label{display:flex;align-items:center;gap:9px;font-size:12px;font-weight:600;margin-bottom:23px}.hero h1{font-size:clamp(48px,5.1vw,70px);line-height:1.075;letter-spacing:-3.7px;font-weight:650;margin-bottom:24px}.hero-copy>p{font-size:15px;max-width:420px;margin-bottom:29px}.hero-actions{display:flex;align-items:center;gap:27px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:28px;min-height:49px;padding:14px 21px;border:1px solid transparent;font-size:13px;line-height:1.4;font-weight:700;border-radius:7px;transition:background .15s,box-shadow .15s}.btn:hover{box-shadow:0 3px 0 #17382f22}.btn span{font-size:19px;line-height:1}.btn-yellow{background:var(--yellow);color:#24362b}.btn-yellow:hover{background:#f1d15b}.btn-green{background:var(--green);color:white}.btn-green:hover{background:#1a573f}.btn-outline{background:transparent;border-color:#8da28c}.quiet-link{border:0;padding:0;background:none;font-size:13px;font-weight:650;display:inline-flex;gap:18px;align-items:center}.hero-note{display:flex;align-items:center;gap:7px;font-size:10px;color:var(--muted);margin-top:19px}.hero-note svg{height:16px;width:16px}.study-visual{position:relative;padding:18px 29px 34px 10px;height:490px}.study-backdrop{position:absolute;inset:0 -10px 0 6px;background:#edf2e8;border-radius:46% 48% 39% 44%;transform:rotate(-5deg);overflow:hidden}.orb{position:absolute;border:1px solid #d5dfce;border-radius:50%}.orb-one{width:380px;height:380px;left:120px;top:80px}.orb-two{width:290px;height:290px;left:210px;top:125px}.pencil-spark{position:absolute;right:16px;top:0;width:66px;height:66px;fill:var(--yellow);stroke:none}.question-sheet{position:relative;background:white;border:1px solid #dde4d7;border-radius:12px;box-shadow:0 18px 30px #25423010;transform:rotate(-2deg);max-width:410px;margin:0 auto;z-index:2}.sheet-top{border-bottom:1px solid #e7ede4;padding:16px 22px;display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:10px;color:#637366}.sheet-top>span:first-child{display:flex;gap:8px;align-items:center}.sheet-top .tiny-dot{width:5px;height:5px}.sheet-dots{letter-spacing:2px}.sheet-body{padding:24px 25px 18px}.subject-meta{display:flex;gap:10px;align-items:center;font-size:10px;color:var(--muted);flex-wrap:wrap}.subject-tag{display:inline-flex;padding:5px 9px;border-radius:5px;background:#edf3e9;font-size:10px;font-weight:650;color:var(--green)}.sheet-body h2{font-size:20px;letter-spacing:-.8px;margin:18px 0 15px}.question-lead{font-size:11px;margin:0}.hero-equation{font-size:33px;text-align:center;font-weight:650;letter-spacing:.3px;margin:12px 0 20px}.hero-options{border:0;padding:0;margin:0;display:flex;gap:9px}.hero-options button{background:white;border:1px solid #dce5dc;border-radius:6px;flex:1;padding:11px 7px;display:flex;align-items:center;gap:9px;font-size:11px;font-weight:600}.hero-options button>span{font-size:9px;display:grid;place-items:center;border-radius:4px;background:#f0f3ee;width:20px;height:22px;color:#6c7e70}.hero-options button:hover{border-color:var(--green)}.hero-options button.correct{background:#e8f3e7;border-color:#458555}.hero-options button.wrong{background:#fff1e7;border-color:#bd743e}.hero-feedback{min-height:50px;margin-top:16px;display:flex;gap:8px;align-items:center;font-size:10px;line-height:1.7;color:var(--muted)}.feedback-icon{font-size:22px;color:var(--green)}.sheet-bottom{display:flex;justify-content:space-between;align-items:center;padding:13px 23px;background:#f7f9f4;border-top:1px solid #e7ede4;border-radius:0 0 12px 12px;color:#758371;font-size:9px}.visual-caption{display:flex;align-items:center;justify-content:center;position:relative;z-index:3;font-family:Georgia,serif;font-style:italic;font-size:21px;transform:rotate(-8deg);margin-top:5px;margin-left:120px;gap:3px}.visual-caption svg{height:44px;width:70px;stroke:#7b8a6b;transform:rotate(10deg)}.page-tab{position:absolute;right:0;top:280px;background:var(--yellow);font-size:10px;font-weight:600;line-height:1.8;padding:16px 12px 16px 25px;transform:rotate(7deg);border-radius:0 5px 5px 0;box-shadow:3px 4px 0 #dfd6a329;z-index:3}.qualification-strip{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:#f4f7f1}.qualification-inner{display:flex;align-items:center;justify-content:space-between;gap:26px;min-height:83px;font-size:12px;font-weight:650}.qualification-inner>span{font-size:11px;font-weight:400;color:var(--muted)}.qualification-inner>div{display:flex;align-items:center;gap:9px}.mini-book{font-size:30px;line-height:1;color:#6f8768}.section-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:30px;margin-bottom:35px}.section-heading h2{margin:12px 0 0}.eyebrow{font-size:11px;color:var(--green);font-weight:650}.section-heading>p,.section-heading>div>p{font-size:12px;margin-bottom:5px;max-width:425px}.catalog-toolbar{display:flex;align-items:center;justify-content:space-between;gap:20px;border-bottom:1px solid var(--line);margin:32px 0 26px;padding-bottom:20px}.board-tabs{display:flex;gap:4px;border:1px solid var(--line);border-radius:8px;padding:4px;background:white}.board-tabs button{border:0;background:none;border-radius:5px;font-size:11px;padding:11px 13px;color:var(--muted);font-weight:650;white-space:nowrap}.board-tabs button[aria-selected=true]{background:var(--green);color:white}.search{display:flex;align-items:center;border:1px solid var(--line);padding:10px 13px;gap:8px;background:white;border-radius:7px}.search svg{height:16px;width:16px;color:var(--muted)}.search input{border:0;outline:none;min-width:0;width:142px;font-size:11px;background:none;color:var(--ink)}.search:focus-within{outline:2px solid var(--green)}.subject-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.subject-card{border:1px solid var(--line);border-radius:10px;background:white;min-width:0;overflow:hidden}.subject-open{display:flex;flex-direction:column;align-items:stretch;justify-content:space-between;text-align:left;width:100%;height:100%;border:0;background:none;padding:22px}.subject-open:hover{background:#f6f9f2}.subject-symbol{height:44px;width:47px;display:flex;align-items:center;font-size:30px;font-weight:500;color:var(--green);margin-bottom:23px}.subject-symbol svg{height:40px;width:40px;stroke-width:1.3}.subject-card:nth-child(4n+2) .subject-symbol{color:#937425}.subject-card:nth-child(4n+3) .subject-symbol{color:#668391}.subject-card h3{font-size:15px;line-height:1.4;margin-bottom:7px}.subject-card p{font-size:10px;margin-bottom:17px;line-height:1.5}.subject-bottom{display:flex;align-items:center;justify-content:space-between;gap:5px;font-size:10px;color:var(--muted);min-height:20px}.sample-label{color:var(--green);display:flex;align-items:center;gap:6px}.sample-label .tiny-dot{width:5px;height:5px}.subject-bottom>span:last-child{font-size:17px;color:var(--green)}.catalog-footer{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-top:23px}.catalog-footer p{font-size:10px;margin:0;display:flex;align-items:center;gap:7px}.catalog-footer .tiny-dot{width:5px;height:5px}.catalog-footer .quiet-link{font-size:11px}.free-section{background:var(--sage);padding:82px 0 78px;border-top:1px solid #e4eade;border-bottom:1px solid #e4eade}.free-pill{display:inline-block;border-radius:20px;border:1px solid #cfdccb;padding:6px 12px;font-size:10px;color:var(--green);margin-top:12px}.resource-toolbar{display:flex;justify-content:space-between;align-items:center;gap:10px;margin:35px 0 22px}.resource-filters{display:flex;gap:8px;flex-wrap:wrap}.resource-filters button{padding:8px 13px;border:1px solid #ccdac7;border-radius:22px;font-size:10px;background:transparent}.resource-filters button[aria-pressed=true]{background:var(--ink);border-color:var(--ink);color:white}#resource-count{font-size:10px;color:var(--muted)}.lesson-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:19px}.lesson-card{background:white;border:1px solid #d8e2d2;border-radius:10px;overflow:hidden;display:flex;flex-direction:column}.lesson-art{height:131px;position:relative;background:#e2ebd9;display:flex;align-items:center;justify-content:center;overflow:hidden}.lesson-art>svg{height:96px;width:150px;stroke:#43684b;stroke-width:1.5}.lesson-art .art-formula{font-size:34px;font-weight:500;color:#426949;letter-spacing:-1.5px;transform:rotate(-5deg)}.lesson-card:nth-child(3n+2) .lesson-art{background:#f3eddb}.lesson-card:nth-child(3n+2) .lesson-art>svg,.lesson-card:nth-child(3n+2) .art-formula{color:#957c3c;stroke:#957c3c}.lesson-card:nth-child(3n+3) .lesson-art{background:#e2ebec}.lesson-card:nth-child(3n+3) .lesson-art>svg,.lesson-card:nth-child(3n+3) .art-formula{color:#5a7985;stroke:#5a7985}.art-free{position:absolute;top:12px;left:14px;font-size:9px;background:#ffffffd6;padding:4px 8px;border-radius:4px;color:var(--ink)}.art-complete{position:absolute;right:10px;top:10px;background:var(--green);color:white;font-size:10px;padding:5px 8px;border-radius:4px}.lesson-card-body{padding:22px;flex:1;display:flex;flex-direction:column}.lesson-card .subject-meta{font-size:9px;gap:7px;margin-bottom:13px}.lesson-card .subject-tag{font-size:9px;padding:4px 7px}.lesson-card h3{font-size:17px;line-height:1.4;margin-bottom:12px}.lesson-card p{font-size:11px;line-height:1.7;margin-bottom:23px}.lesson-card-footer{margin-top:auto;display:flex;justify-content:space-between;align-items:center;gap:15px;padding-top:14px;border-top:1px solid #e7ece3;font-size:10px;color:var(--muted)}.lesson-card-footer button{border:0;background:none;font-size:11px;font-weight:700;padding:5px 0;color:var(--green)}.lesson-card-footer button:hover{text-decoration:underline}.lesson-card-footer button>span{padding-left:8px}.method-section{display:grid;grid-template-columns:1fr 1fr;gap:100px;padding-top:108px;padding-bottom:90px}.method-intro h2{margin:13px 0 23px;font-size:39px}.method-intro p{font-size:13px;max-width:340px;margin-bottom:24px}.learning-loop{display:flex;flex-direction:column;justify-content:space-between;gap:25px}.learning-loop article{display:flex;gap:20px;position:relative}.learning-loop article:not(:last-child):before{content:'';height:calc(100% + 23px);width:1px;background:var(--line);position:absolute;left:20px;top:20px}.step-number{height:42px;width:42px;flex-shrink:0;border-radius:50%;background:var(--sage);border:1px solid #d5e1cd;display:grid;place-items:center;font-size:13px;position:relative;z-index:1}.learning-loop h3{font-size:17px;margin:8px 0 7px}.learning-loop p{font-size:12px;max-width:340px;margin-bottom:0}.desk-banner{background:#f5f1df;border-radius:15px;display:grid;grid-template-columns:1fr 1.5fr;align-items:center;padding-top:44px;padding-bottom:44px;max-width:1160px;gap:30px}.desk-banner h2{margin:12px 0 17px;font-size:34px}.desk-banner p{font-size:12px;max-width:430px;margin-bottom:21px}.desk-art{display:flex;align-items:center;justify-content:center;min-height:220px;position:relative}.note-paper{background:#fffef4;box-shadow:0 5px 10px #846c2215;width:210px;height:190px;padding:35px 25px;font-family:Georgia,serif;font-style:italic;font-size:28px;line-height:1.3;transform:rotate(-8deg);color:#5d6748;position:relative}.note-paper:before{content:'';position:absolute;top:-9px;left:75px;width:65px;height:25px;background:#d5cf9b66;transform:rotate(5deg)}.note-paper>span{position:absolute;bottom:15px;right:25px;font-size:40px;color:#7e8e57}.pencil{position:absolute;width:12px;height:186px;background:linear-gradient(90deg,#e6b742 30%,#f9d36d 30%,#f9d36d 70%,#d1a334 70%);right:32px;bottom:8px;transform:rotate(25deg);border-radius:2px 2px 0 0}.pencil:after{content:'';position:absolute;bottom:-22px;left:0;border-left:6px solid transparent;border-right:6px solid transparent;border-top:22px solid #8f7750}.membership-section{padding-top:95px}.membership-grid{display:grid;grid-template-columns:1fr 1fr;gap:23px;margin-top:38px}.membership-grid article{padding:34px 37px;border:1px solid var(--line);border-radius:12px}.free-plan{background:white}.membership-grid article>span{font-size:11px;font-weight:650}.membership-grid h3{font-size:25px;margin:16px 0 18px}.price{font-size:36px;color:var(--ink);font-weight:650;letter-spacing:-1px}.price small{font-size:11px;font-weight:400;letter-spacing:0;margin-left:5px;color:var(--muted)}.membership-grid ul{list-style:none;padding:0;margin:25px 0 30px;display:grid;gap:16px}.membership-grid li{font-size:12px;display:flex;gap:10px;color:#4b6254}.membership-grid li:before{content:'✓';color:var(--green);font-weight:700}.future-plan{background:#edf3e9}.future-plan .coming-badge{font-size:10px;border:1px solid #becfb4;padding:5px 9px;border-radius:4px}.future-plan p{font-size:12px;max-width:385px}.future-plan>small{display:block;font-size:9px;color:var(--muted);margin-top:15px}.faq-section{display:grid;grid-template-columns:.9fr 1.3fr;gap:80px;padding-top:3px;padding-bottom:90px}.faq-section h2{font-size:29px;line-height:1.35;max-width:300px}.faqs details{border-bottom:1px solid var(--line)}.faqs details:first-child{border-top:1px solid var(--line)}.faqs summary{font-size:12px;font-weight:650;padding:20px 28px 20px 0;cursor:pointer;list-style:none;position:relative}.faqs summary:after{content:'+';position:absolute;right:0;font-size:19px;top:14px;font-weight:400}.faqs details[open] summary:after{content:'−'}.faqs p{font-size:12px;padding-right:18px}.closing{position:relative;background:var(--ink);color:white;border-radius:14px;max-width:1160px;display:flex;align-items:center;justify-content:space-between;padding:49px 55px;margin-bottom:72px;overflow:hidden}.closing h2{font-size:40px;position:relative;z-index:1;margin-bottom:15px}.closing p{font-size:12px;color:#d6e3d1;margin:0}.closing .btn{z-index:1}.closing>svg{position:absolute;width:200px;height:200px;right:228px;top:25px;color:#ffffff0d;stroke-width:8}.footer{padding-top:0;padding-bottom:30px}.footer-top{display:flex;justify-content:space-between;gap:40px;padding-bottom:33px}.footer-top p{font-size:11px;margin-top:13px}.footer .brand{font-size:23px}.footer-links{display:flex;gap:23px;align-items:flex-start;padding-top:13px;font-size:10px;flex-wrap:wrap}.footer-links button{border:0;padding:0;background:none;font-size:10px}.footer-bottom{border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:25px;padding-top:23px;font-size:9px;color:var(--muted)}.footer-bottom p{font-size:9px;margin:0;max-width:570px;text-align:right}.loading,.empty{font-size:13px;padding:35px;grid-column:1/-1;text-align:center}.empty a{color:var(--green);text-decoration:underline}dialog{border:1px solid var(--line);border-radius:16px;padding:0;color:var(--ink);background:var(--paper);max-height:92dvh;box-shadow:0 20px 100px #17382f30}dialog::backdrop{background:#11251dcc;backdrop-filter:blur(4px)}body:has(dialog[open]){overflow:hidden}.dialog-header{display:flex;justify-content:space-between;align-items:center;padding:21px 28px;border-bottom:1px solid var(--line);gap:15px;position:sticky;top:0;z-index:3;background:var(--paper)}.dialog-header h2{font-size:22px;margin:0;letter-spacing:-.6px}.dialog-header .brand{font-size:21px}.icon-btn{border:1px solid var(--line);width:33px;height:33px;border-radius:50%;background:white;font-size:23px;line-height:1;flex-shrink:0}.lesson-dialog{width:950px}.lesson-heading{padding:35px 42px 22px}.lesson-heading h2{font-size:34px;margin:16px 0}.lesson-heading>p{font-size:11px;margin:0}.lesson-heading .subject-meta{font-size:11px}.lesson-heading-actions{display:flex;gap:12px;align-items:center;margin-top:20px}.bookmark-btn{background:white;padding:8px 12px;border:1px solid var(--line);border-radius:5px;font-size:11px}.bookmark-btn[aria-pressed=true]{background:var(--sage);border-color:var(--green)}.lesson-nav{display:flex;gap:4px;padding:0 42px;border-bottom:1px solid var(--line);overflow-x:auto}.lesson-nav button{border:0;border-bottom:2px solid transparent;background:none;padding:14px 15px;font-size:12px;white-space:nowrap}.lesson-nav button[aria-selected=true]{border-color:var(--green);color:var(--green);font-weight:700}.lesson-panel{padding:30px 42px 40px;min-height:330px}.prose p,.lesson-panel p,.lesson-panel li{font-size:13px;line-height:1.9}.prose h3,.lesson-panel h3{font-size:20px;line-height:1.4;margin:25px 0 12px}.objectives{background:var(--sage);padding:20px 24px;border-radius:8px;margin-bottom:25px}.objectives h3{font-size:14px;margin:0 0 10px}.objectives ul{margin:0;padding-left:20px}.objectives li{font-size:12px}.tip{padding:18px 22px;background:#f7f0d7;border-left:3px solid #c19c33;border-radius:0 5px 5px 0;font-size:12px;line-height:1.8;margin-top:25px}.worked-question{padding:20px 24px;border:1px solid var(--line);border-radius:7px;background:white;font-size:14px;line-height:1.8}.worked-steps{padding-left:26px}.worked-steps li{padding:9px 0 9px 7px}.worked-answer{background:var(--sage);padding:15px 20px;border-radius:6px;font-size:14px;line-height:1.7}.quiz-question{border:0;padding:0;margin:0 0 27px}.quiz-question legend{font-weight:650;font-size:14px;line-height:1.8;margin-bottom:15px}.quiz-options{display:grid;gap:9px}.quiz-option{display:flex;align-items:flex-start;gap:10px;padding:13px 16px;background:white;border:1px solid var(--line);border-radius:6px;font-size:12px;line-height:1.6;cursor:pointer}.quiz-option input{margin-top:3px;accent-color:var(--green)}.quiz-option:has(input:checked){border-color:var(--green);background:#eff5eb}.quiz-option.is-correct{border-color:#43854f;background:#e8f4e5}.quiz-option.is-wrong{border-color:#bf7950;background:#fff0e6}.answer-explanation{font-size:12px;padding:14px 18px;background:#edf3e9;border-radius:6px;line-height:1.8;margin-top:12px}.answer-explanation strong{display:block;margin-bottom:4px}.quiz-result{padding:22px;background:var(--sage);border-radius:7px;margin-bottom:24px}.quiz-result h3{margin:0 0 8px}.quiz-result p{margin:0}.quiz-notice{font-size:12px;color:#92501b;margin-bottom:15px}.flashcard{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:22px;width:100%;min-height:240px;padding:35px;background:white;border:1px solid #d0dfc9;border-radius:12px;text-align:center}.flashcard span{font-size:11px;color:var(--green)}.flashcard strong{font-size:23px;font-weight:550;line-height:1.5;max-width:650px}.flashcard small{font-size:10px;color:var(--muted)}.flashcard-controls{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:20px}.flashcard-controls button{border:1px solid var(--line);background:white;border-radius:5px;padding:9px 14px;font-size:12px}.flashcard-controls>span{font-size:11px}.flashcard-hint{font-size:11px;text-align:center;margin-top:18px}.desk-dialog{width:750px}.desk-content,.desk-dialog #desk-content{padding:28px}.desk-note{font-size:12px}.desk-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:13px;margin:25px 0}.desk-stat{background:var(--sage);border-radius:8px;padding:18px}.desk-stat strong{display:block;font-size:28px}.desk-stat span{font-size:11px;color:var(--muted)}.desk-row{display:flex;justify-content:space-between;align-items:center;gap:20px;border-bottom:1px solid var(--line);padding:17px 0}.desk-row h3{font-size:14px;margin-bottom:6px}.desk-row p{font-size:10px;margin:0}.desk-row button{border:0;background:none;color:var(--green);font-size:12px;font-weight:650;padding:10px}.desk-section-title{font-size:18px;margin-top:30px}.clear-progress{border:0;background:none;text-decoration:underline;text-underline-offset:4px;font-size:11px;color:var(--muted);padding:0;margin-top:28px}.small-dialog{width:510px;padding-bottom:28px}.small-dialog>h2{font-size:30px;margin:28px 30px 18px}.small-dialog>p{margin:0 30px 20px;font-size:12px}.small-dialog form,.small-dialog>.prose{padding:0 30px}.small-dialog>.prose{padding-top:10px}.small-dialog form>label{display:flex;flex-direction:column;gap:8px;font-size:12px;font-weight:600;margin:18px 0}.small-dialog input[type=email],.small-dialog select{padding:12px;background:white;border:1px solid #b8cab3;border-radius:6px;color:var(--ink);width:100%;font-size:13px}.small-dialog form .checkbox-label{flex-direction:row;font-weight:400;font-size:11px;line-height:1.7;gap:10px;margin:24px 0}.checkbox-label input{accent-color:var(--green);margin-top:4px;flex-shrink:0}.inline-privacy{border:0;padding:0;background:none;text-decoration:underline;font-size:inherit}.small-dialog .btn{width:100%}#updates-status{font-size:12px;line-height:1.8;margin:15px 0 0}#updates-status a{color:var(--green);text-decoration:underline}.honeypot{position:absolute;left:-10000px}.toast{position:fixed;bottom:24px;left:50%;transform:translate(-50%,15px);background:var(--ink);color:white;padding:14px 22px;border-radius:8px;font-size:12px;z-index:100;opacity:0;pointer-events:none;transition:opacity .15s,transform .15s;max-width:90vw}.toast.show{opacity:1;transform:translate(-50%,0)}.official-link{display:inline-block;font-size:12px;color:var(--green);text-decoration:underline;margin-top:10px}.subject-modal-note{padding:28px}.subject-modal-note h2{font-size:30px;margin:15px 0}.subject-modal-note p{font-size:13px}.subject-modal-note .lesson-grid{grid-template-columns:1fr;margin-top:25px}.subject-modal-note .lesson-art{display:none}.subject-modal-note .lesson-card{margin-top:10px}
@media(min-width:1450px){.hero{min-height:720px;padding-top:85px;padding-bottom:90px}.hero h1{font-size:76px}.study-visual{height:490px}}
@media(max-width:1050px){.wrap{padding-left:30px;padding-right:30px}.nav nav{gap:18px;font-size:12px}.nav{gap:20px}.nav>.text-btn{font-size:11px}.hero{gap:20px}.hero h1{font-size:59px}.hero-copy>p{font-size:13px}.hero-actions{gap:20px}.study-visual{padding-right:15px;padding-left:0}.sheet-body{padding:23px 20px 15px}.sheet-body h2{font-size:18px}.page-tab{right:-12px}.qualification-inner{gap:15px;font-size:10px}.qualification-inner>span{font-size:9px}.section-heading>p,.section-heading>div>p{font-size:11px}.subject-open{padding:18px}.desk-banner,.closing{margin-left:30px;margin-right:30px}.method-section{gap:60px}.method-intro h2{font-size:34px}.footer-links{gap:15px}.pencil{right:10px}}
@media(max-width:800px){.nav nav{display:none}.nav>.text-btn{margin-left:auto}.menu-btn{display:block}.nav nav.is-open{position:absolute;top:90px;left:0;right:0;display:flex;flex-direction:column;align-items:stretch;background:var(--paper);padding:20px 30px;border-bottom:1px solid var(--line);gap:0}.hero{grid-template-columns:1fr 1fr;padding-top:46px;padding-bottom:45px;min-height:580px}.hero h1{font-size:48px;letter-spacing:-2.8px}.hero-copy>p{font-size:12px}.hero-actions{gap:17px;flex-wrap:wrap}.hero-note{font-size:9px;line-height:1.6}.study-visual{height:421px;padding-top:15px}.sheet-top{padding:13px 15px;font-size:8px}.sheet-body{padding:18px 15px 12px}.sheet-body h2{font-size:16px}.subject-meta{font-size:8px;gap:5px}.subject-tag{font-size:8px;padding:4px 6px}.hero-equation{font-size:27px}.hero-options{gap:6px}.hero-options button{padding:10px 6px;gap:5px;font-size:9px;justify-content:center}.hero-options button>span{display:none}.sheet-bottom{font-size:8px;padding:12px 15px}.hero-feedback{font-size:9px;min-height:56px}.page-tab{top:270px;font-size:8px;padding:11px 8px 11px 14px}.visual-caption{font-size:17px;margin-left:80px}.visual-caption svg{width:40px}.qualification-inner{flex-wrap:wrap;justify-content:center;min-height:100px;gap:10px 28px;padding-top:18px;padding-bottom:18px}.qualification-inner>span{flex-basis:100%;text-align:center;font-size:10px}.qualification-inner>div{font-size:10px}.mini-book{font-size:23px}.section{padding-top:70px;padding-bottom:65px}.section-heading{gap:24px}.section-heading h2{font-size:35px}.section-heading>p,.section-heading>div>p{max-width:290px}.catalog-toolbar{align-items:stretch;gap:15px;flex-direction:column}.search{align-self:flex-start}.search input{width:220px}.board-tabs{align-self:flex-start}.subject-grid{grid-template-columns:repeat(3,1fr);gap:12px}.subject-open{padding:18px}.subject-card h3{font-size:13px}.subject-card p{font-size:9px}.catalog-footer{align-items:flex-start}.catalog-footer p{max-width:350px;line-height:1.7;font-size:9px}.catalog-footer .tiny-dot{margin-top:5px}.catalog-footer .quiet-link{font-size:10px;white-space:nowrap}.free-section{padding-top:60px;padding-bottom:60px}.lesson-grid{grid-template-columns:repeat(2,1fr);gap:15px}.method-section{gap:35px;grid-template-columns:.95fr 1fr}.method-intro h2{font-size:29px;letter-spacing:-1px}.method-intro p{font-size:12px}.learning-loop h3{font-size:15px}.learning-loop p{font-size:11px}.learning-loop article{gap:14px}.step-number{height:35px;width:35px}.learning-loop article:not(:last-child):before{left:17px}.desk-banner{grid-template-columns:1fr 1.4fr;gap:20px}.note-paper{height:160px;width:165px;font-size:24px;padding:30px 20px}.pencil{right:0;height:150px;bottom:20px}.desk-banner h2{font-size:28px}.desk-banner p{font-size:11px}.membership-grid article{padding:28px}.membership-grid h3{font-size:21px}.membership-grid li{font-size:11px;line-height:1.5}.price small{display:block;margin:0}.faq-section{gap:45px;grid-template-columns:1fr 1.3fr}.faq-section h2{font-size:25px}.faqs summary{font-size:11px}.closing{padding:38px}.closing h2{font-size:35px}.footer-top{flex-direction:column;gap:10px}.footer-links{gap:22px}.footer-bottom{align-items:flex-start}.footer-bottom p{max-width:400px}.lesson-heading{padding:28px}.lesson-nav{padding:0 20px}.lesson-panel{padding:25px 28px 30px}.lesson-heading h2{font-size:29px}}
@media(max-width:580px){.wrap{padding-left:22px;padding-right:22px}.header{height:75px}.brand{font-size:23px;gap:8px}.brand img{width:33px;height:33px}.nav{gap:12px}.nav>.text-btn{font-size:11px;gap:5px}.nav>.text-btn svg{display:none}.menu-btn{padding:5px}.nav nav.is-open{top:74px}.hero{grid-template-columns:1fr;gap:34px;padding-top:36px;padding-bottom:37px}.hero-copy{max-width:420px}.release-label{font-size:10px;margin-bottom:20px}.hero h1{font-size:56px;letter-spacing:-3px;line-height:1.06;margin-bottom:20px}.hero-copy>p{font-size:13px;max-width:350px;margin-bottom:24px}.hero-actions{gap:25px}.btn{min-height:48px;font-size:12px;gap:25px;padding:13px 19px}.hero-note{font-size:9px;margin-top:16px}.study-visual{height:431px;max-width:395px;width:100%;margin:auto;padding:15px 23px 10px 4px}.study-backdrop{inset:0 0 15px 0}.question-sheet{max-width:350px}.sheet-top{font-size:9px;padding:15px 19px}.sheet-body{padding:21px 22px 12px}.sheet-body h2{font-size:19px;margin-top:17px}.subject-meta{font-size:9px;gap:8px}.subject-tag{font-size:9px;padding:4px 7px}.hero-equation{font-size:31px;margin:15px 0 19px}.hero-options button{padding:11px 7px;font-size:10px;gap:7px}.hero-options button>span{display:grid;font-size:8px;height:18px;width:16px}.hero-feedback{font-size:9px;min-height:43px}.sheet-bottom{padding:11px 20px;font-size:8px}.page-tab{top:250px;right:0;font-size:9px;padding:14px 9px 14px 21px}.visual-caption{margin-left:100px;margin-top:1px;font-size:19px}.visual-caption svg{width:52px}.qualification-inner{gap:12px 20px;padding:18px 20px;min-height:122px}.qualification-inner>div{font-size:9px;gap:6px}.qualification-inner>div:last-child{flex-basis:100%;justify-content:center}.qualification-inner>span{font-size:9px}.section{padding-top:57px;padding-bottom:52px}.section-heading{flex-direction:column;align-items:flex-start;gap:20px;margin-bottom:26px}.section-heading h2{font-size:36px;letter-spacing:-1.7px}.section-heading>p,.section-heading>div>p{font-size:12px;max-width:none;line-height:1.8}.section-heading br+p br{display:none}.eyebrow{font-size:10px}.catalog-toolbar{margin-top:26px;margin-bottom:19px;padding-bottom:17px;gap:12px}.board-tabs{width:100%;justify-content:space-between}.board-tabs button{font-size:9px;padding:10px 8px;flex:1}.search{width:100%}.search input{width:100%;font-size:11px}.subject-grid{grid-template-columns:repeat(2,1fr);gap:12px}.subject-open{padding:18px 16px}.subject-symbol{margin-bottom:17px;height:36px}.subject-symbol svg{width:34px;height:34px}.subject-card h3{font-size:13px}.subject-card p{font-size:9px;margin-bottom:12px}.subject-bottom{font-size:8px;gap:3px}.catalog-footer{flex-direction:column;gap:16px}.catalog-footer p{max-width:none;align-items:center}.catalog-footer .tiny-dot{margin-top:0}.catalog-footer .quiet-link{align-self:flex-end;font-size:11px}.free-section{padding-top:48px;padding-bottom:48px}.resource-toolbar{align-items:flex-start;margin-top:27px}.resource-filters{gap:5px}.resource-filters button{padding:8px 10px;font-size:9px}#resource-count{display:none}.free-pill{font-size:9px}.lesson-grid{grid-template-columns:1fr;gap:18px}.lesson-art{height:144px}.lesson-card-body{padding:21px 23px}.lesson-card h3{font-size:20px}.lesson-card p{font-size:12px;margin-bottom:21px}.lesson-card .subject-meta,.lesson-card .subject-tag{font-size:9px}.lesson-card-footer{font-size:10px}.lesson-card-footer button{font-size:12px}.method-section{grid-template-columns:1fr;gap:37px}.method-intro h2{font-size:33px}.method-intro p{font-size:12px}.learning-loop{gap:27px}.learning-loop article{gap:18px}.learning-loop h3{font-size:17px;margin-top:5px}.learning-loop p{font-size:12px;max-width:none}.desk-banner{margin-left:22px;margin-right:22px;padding:30px 25px 35px;grid-template-columns:1fr;gap:15px}.desk-art{min-height:165px;width:220px;margin:0 auto}.note-paper{height:145px;font-size:23px}.pencil{right:7px;height:140px;bottom:3px}.desk-banner h2{font-size:29px}.desk-banner p{font-size:12px}.membership-grid{grid-template-columns:1fr;gap:18px;margin-top:30px}.membership-grid article{padding:27px}.membership-grid h3{font-size:25px}.membership-grid li{font-size:12px}.price small{display:inline;margin-left:4px;font-size:10px}.future-plan p{font-size:12px}.future-plan>small{font-size:9px;line-height:1.6}.faq-section{grid-template-columns:1fr;gap:17px;padding-top:0;padding-bottom:52px}.faq-section h2{font-size:28px;max-width:310px}.faqs summary{font-size:12px;line-height:1.6}.faqs p{font-size:12px}.closing{margin:0 22px 45px;padding:34px 28px;flex-direction:column;align-items:flex-start;gap:24px}.closing h2{font-size:36px}.closing .btn{width:auto}.closing>svg{right:-75px;top:50px}.footer-top{padding-bottom:27px}.footer-links{gap:18px 22px;font-size:11px}.footer-links button{font-size:11px}.footer-bottom{flex-direction:column;gap:12px;padding-top:18px}.footer-bottom p{text-align:left;font-size:9px;line-height:1.7}.footer{padding-bottom:25px}.small-dialog{max-width:calc(100vw - 26px)}.lesson-dialog,.desk-dialog{max-width:calc(100vw - 16px);max-height:96dvh;border-radius:10px}.dialog-header{padding:16px 20px}.lesson-heading{padding:24px 20px 19px}.lesson-heading h2{font-size:27px;letter-spacing:-1px;line-height:1.3}.lesson-nav{padding:0 9px}.lesson-nav button{font-size:11px;padding:13px 11px}.lesson-panel{padding:22px 20px 28px}.lesson-panel p,.lesson-panel li{font-size:12px}.objectives{padding:17px}.objectives li{font-size:11px}.worked-question{font-size:13px;padding:17px}.flashcard{min-height:230px;padding:25px}.flashcard strong{font-size:20px}.desk-stats{gap:8px}.desk-stat{padding:14px 10px}.desk-stat strong{font-size:25px}.desk-stat span{font-size:9px}.desk-row h3{font-size:12px;line-height:1.5}.desk-row button{font-size:11px}.small-dialog>h2{margin-left:24px;margin-right:24px}.small-dialog>p{margin-left:24px;margin-right:24px}.small-dialog form,.small-dialog>.prose{padding-left:24px;padding-right:24px}.toast{font-size:11px;width:max-content;text-align:center}}
@media(prefers-reduced-motion:reduce){:root{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}

.more-lessons{display:flex;justify-content:center;margin-top:30px}.more-lessons button[hidden]{display:none}

@media(max-width:580px){.hero{grid-template-columns:minmax(0,1fr)}.hero h1{font-size:clamp(46px,14.4vw,56px)}.study-visual{min-width:0}.study-backdrop{inset:7px 5px 18px 4px;transform:none}.hero-options button{min-width:0}}