:root{--ink:#17324d;--muted:#647487;--teal:#157a78;--teal-dark:#0d5f5e;--mint:#dff3ec;--cream:#fbf7ee;--paper:#fffefa;--coral:#f27662;--yellow:#f4bf4f;--line:#dce5e2}*{box-sizing:border-box}html{scroll-behavior:smooth}body{color:var(--ink);background:var(--cream);margin:0;font-family:Avenir,Segoe UI,Arial,sans-serif}button,select,input{font:inherit}button{cursor:pointer}.topbar{justify-content:space-between;align-items:center;max-width:1280px;height:80px;margin:auto;padding:0 32px;display:flex}.brand{color:var(--ink);align-items:center;gap:11px;text-decoration:none;display:flex}.brand-section{flex-direction:column;line-height:1.05;display:flex}.brand small{text-transform:uppercase;letter-spacing:1.8px;color:var(--teal);font-size:10px;font-weight:700}.brand-logo-crop{width:178px;height:60px;display:block;position:relative;overflow:hidden}.brand-logo-crop img{object-fit:contain;width:178px;max-width:none;height:178px;position:absolute;top:-51px;left:0}.worksheet-logo-crop{width:112px;height:38px;display:block;position:relative;overflow:hidden}.worksheet-logo-crop img{object-fit:contain;width:112px;max-width:none;height:112px;position:absolute;top:-32px;left:0}.logo-mark,.mini-brand{background:var(--teal);color:#fff;border-radius:13px 13px 13px 4px;place-items:center;width:43px;height:43px;font:900 25px Avenir,Segoe UI,sans-serif;display:grid;transform:rotate(-2deg)}.language{color:var(--teal-dark);background:#fff;border:1px solid #cddbd7;border-radius:99px;padding:9px 16px;font-weight:700}.intro{grid-template-columns:minmax(0,720px) 1fr;align-items:center;gap:55px;max-width:1280px;margin:auto;padding:48px 32px 40px;display:grid;position:relative}.eyebrow{color:var(--coral);text-transform:uppercase;letter-spacing:1.8px;font-size:13px;font-weight:800}.eyebrow span{color:var(--yellow)}h1{letter-spacing:-2.7px;max-width:760px;margin:12px 0 14px;font:900 clamp(38px,5vw,66px)/.98 Avenir,Segoe UI,sans-serif}.subtitle{max-width:660px;color:var(--muted);margin:0;font-size:17px;line-height:1.65}.number-cloud{height:170px;position:relative}.number-cloud span{place-items:center;font:900 26px Nunito;display:grid;position:absolute}.number-cloud span:first-child{background:var(--yellow);border-radius:50%;width:75px;height:75px;top:50px;left:20px;transform:rotate(-9deg)}.number-cloud span:nth-child(2){background:var(--teal);color:#fff;border-radius:18px;width:54px;height:54px;top:5px;left:110px;transform:rotate(8deg)}.number-cloud span:nth-child(3){color:var(--teal);font-size:48px;top:42px;right:25px}.number-cloud span:nth-child(4){color:var(--coral);font-size:35px;bottom:0;right:90px;transform:rotate(10deg)}.number-cloud span:nth-child(5){color:var(--ink);font-size:31px;bottom:0;left:115px}.workspace{grid-template-columns:330px minmax(0,1fr);align-items:start;gap:28px;max-width:1280px;margin:auto;padding:0 32px 70px;display:grid}.builder-card{border:1px solid var(--line);background:#fff;border-radius:20px;padding:24px;position:sticky;top:22px;box-shadow:0 18px 50px #17324d14}.card-heading{border-bottom:1px solid #edf0ed;align-items:center;gap:12px;padding-bottom:20px;display:flex}.step{background:var(--mint);width:34px;height:34px;color:var(--teal);border-radius:50%;place-items:center;font-weight:900;display:grid}.card-heading p{margin:0;font:800 18px Nunito}.card-heading small{color:var(--muted);font-size:11px}.builder-card label{text-transform:uppercase;letter-spacing:.8px;margin:20px 0 9px;font-size:12px;font-weight:800;display:block}.grade-grid,.count-row{grid-template-columns:repeat(7,1fr);gap:6px;display:grid}.count-row{grid-template-columns:repeat(4,1fr)}.grade-grid button,.count-row button{height:38px;color:var(--ink);background:#fff;border:1px solid #d7e1dd;border-radius:9px;font-weight:700}.grade-grid button.selected,.count-row button.selected{background:var(--teal);border-color:var(--teal);color:#fff;box-shadow:0 4px 10px #157a7833}select{width:100%;height:45px;color:var(--ink);background:#fff;border:1px solid #d5dfdc;border-radius:10px;padding:0 12px}.primary{background:var(--coral);color:#fff;border:0;border-radius:11px;justify-content:center;align-items:center;gap:28px;width:100%;height:50px;margin-top:24px;font-weight:800;display:flex;box-shadow:0 8px 18px #f2766238}.primary:hover{background:#dc6855}.privacy-note{color:#73827d;text-align:center;margin:12px 0 0;font-size:10px}.sheet-wrap{min-width:0}.sheet-actions{justify-content:space-between;align-items:center;height:58px;margin-bottom:10px;display:flex}.sheet-actions>div:first-child{align-items:center;gap:10px;display:flex}.sheet-actions strong{font:800 16px Nunito}.topic-pill{background:var(--mint);color:var(--teal-dark);border-radius:99px;padding:6px 10px;font-size:11px;font-weight:800}.action-buttons{gap:7px;display:flex}.action-buttons button{color:var(--ink);background:#fff;border:1px solid #d1ddda;border-radius:8px;padding:8px 11px;font-size:11px;font-weight:700}.action-buttons .print-button{background:var(--teal);border-color:var(--teal);color:#fff}.worksheet{background:var(--paper);border:1px solid #d7ded9;min-height:760px;padding:36px 42px 24px;position:relative;box-shadow:0 18px 40px #17324d14}.worksheet:before{content:"";pointer-events:none;border:1px solid #ece7da;position:absolute;inset:8px}.worksheet-head{border-bottom:2px solid var(--ink);justify-content:space-between;align-items:center;padding-bottom:18px;display:flex;position:relative}.worksheet-head>div:first-child{align-items:center;gap:10px;display:flex}.mini-brand{border-radius:10px 10px 10px 3px;width:34px;height:34px;font-size:18px}.mini-brand.coral{background:var(--coral)}.worksheet-head p{flex-direction:column;margin:0;display:flex}.worksheet-head p b{font:800 15px Nunito}.worksheet-head p small{text-transform:uppercase;letter-spacing:1px;color:var(--teal);font-size:9px}.fields{color:#40536a;gap:22px;font-size:11px;display:flex}.worksheet-title{text-align:center;padding:22px 0 20px}.worksheet-title p{margin:0 0 5px;font:900 22px Nunito}.worksheet-title small{color:var(--muted);font-size:10px}.problems{grid-template-columns:repeat(2,minmax(0,1fr));gap:13px 52px;display:grid}.problem{grid-template-columns:25px minmax(0,1fr) 72px 18px;align-items:end;min-height:34px;font-size:15px;display:grid}.num{color:#8a979f;font-size:11px}.equation{font-weight:700}.problem input{text-align:center;background:0 0;border:0;border-bottom:1px solid #9ca9ae;outline:0;width:100%;height:27px}.problem input:focus{border-bottom:2px solid var(--teal)}.problem input.right{color:var(--teal);border-color:var(--teal)}.problem input.wrong{color:var(--coral);border-color:var(--coral)}.result{text-align:right;font-weight:900}.result.ok{color:var(--teal)}.result.no{color:var(--coral)}.online-check{background:#eef7f4;border-radius:12px;justify-content:center;align-items:center;gap:16px;margin:32px 0 10px;padding:16px;display:flex}.online-check button{background:var(--teal);color:#fff;border:0;border-radius:8px;padding:9px 16px;font-weight:800}.online-check .link{color:var(--teal);background:0 0;text-decoration:underline}.online-check strong{font-size:12px}.worksheet footer{text-align:center;color:#8b9697;margin-top:28px;font-size:9px}.answer-sheet{min-height:auto;margin-top:24px}.answers-grid{grid-template-columns:repeat(5,1fr);gap:11px 22px;margin-top:28px;display:grid}.answers-grid div{border-bottom:1px solid #ddd;gap:8px;padding:7px;display:flex}.answers-grid span{color:#8a979f}.answers-grid b{color:var(--teal-dark)}.skill-strip{background:var(--ink);color:#fff;flex-wrap:wrap;justify-content:center;align-items:center;gap:12px;padding:28px 32px;display:flex}.skill-strip p{text-transform:uppercase;letter-spacing:1.5px;color:#b9c8d5;margin-right:20px;font-size:10px;font-weight:800}.skill-strip button{color:#fff;background:#203d58;border:1px solid #3f566d;border-radius:10px;align-items:center;gap:8px;padding:10px 14px;display:flex}.skill-strip button span{color:var(--yellow);font-weight:900}@media (width<=900px){.intro{grid-template-columns:1fr}.number-cloud{display:none}.workspace{grid-template-columns:1fr}.builder-card{position:static}.worksheet{padding:28px 24px}.sheet-actions{align-items:flex-start;gap:12px;height:auto}.action-buttons{flex-wrap:wrap;justify-content:flex-end}}@media (width<=600px){.topbar{padding:0 18px}.brand-logo-crop{width:150px;height:52px}.brand-logo-crop img{width:150px;height:150px;top:-43px}.brand-section{display:none}.intro{padding:28px 18px 30px}.workspace{padding:0 14px 45px}.sheet-actions{flex-direction:column}.action-buttons{justify-content:flex-start}.worksheet{padding:24px 18px}.fields{flex-direction:column;gap:6px}.problems{grid-template-columns:1fr;gap:12px}.answers-grid{grid-template-columns:repeat(2,1fr)}h1{letter-spacing:-1.5px;font-size:40px}}@media print{body{background:#fff}.topbar,.intro,.builder-card,.sheet-actions,.skill-strip,.no-print{display:none!important}.workspace{padding:0;display:block}.sheet-wrap{width:100%}.worksheet{box-shadow:none;page-break-after:always;border:0;min-height:auto;padding:22px}.worksheet:before{display:none}.problems{row-gap:16px}.answer-sheet{display:block}.problem input{border-bottom:1px solid #777}.worksheet footer{margin-top:22px}@page{size:letter;margin:.35in}}
