:root{color-scheme:light;--ink:#1d2941;--muted:#4d5d6a;--accent:#355d7a;--wash:#edf3f4;--line:#cad8dc;--paper:#fffefb;font-family:Arial,Helvetica,sans-serif;font-size:18px;line-height:1.6;background:var(--wash);color:var(--ink)}*{box-sizing:border-box}body{margin:0}.build{--accent:#3b6f8c}.grow{--accent:#3f7d6e}.launch{--accent:#664b88}a{color:var(--accent);text-underline-offset:.18em}a:hover{text-decoration-thickness:3px}button,input,select,textarea{font:inherit}button,a,summary,input,select,textarea{-webkit-tap-highlight-color:transparent}button,a:focus-visible,summary:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline-offset:4px}button:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid #bf6d12}.wrap{width:min(1120px,calc(100% - 40px));margin-inline:auto}.site-header{background:#1d2941;color:white;border-bottom:5px solid #9dd9c4}.topbar{display:flex;align-items:center;justify-content:space-between;gap:24px;padding-block:18px}.site-header a{color:white}.brand{font-weight:800;text-decoration:none}.brand span{display:block;font-size:.75rem;font-weight:400}.topbar nav{display:flex;flex-wrap:wrap;gap:12px 24px}.topbar nav a{padding-block:8px}.lesson-intro{padding-block:38px 24px}.eyebrow{text-transform:uppercase;letter-spacing:.07em;font-size:.74rem;font-weight:800;color:var(--accent);margin-bottom:8px}h1,h2,h3{line-height:1.15;letter-spacing:-.025em;margin-top:0}h1{font-size:clamp(2rem,5vw,3.4rem);max-width:20ch;margin-bottom:18px}h2{font-size:clamp(1.65rem,3vw,2.3rem)}h3{font-size:1.28rem}.large{font-size:clamp(1.15rem,2.2vw,1.5rem);line-height:1.45}.small{font-size:.83rem;color:var(--muted)}.week-nav,.downloads{display:flex;flex-wrap:wrap;gap:10px;margin-block:18px}.week-nav a{padding:9px 15px;border:1px solid var(--line);border-radius:8px;background:var(--paper);min-height:44px;font-weight:700}.week-nav [aria-current]{background:var(--accent);color:white;border-color:var(--accent)}.button,button{display:inline-flex;align-items:center;justify-content:center;text-align:center;min-height:46px;padding:11px 18px;border:2px solid var(--accent);background:var(--accent);color:white;border-radius:8px;font-weight:700;text-decoration:none;cursor:pointer}.button.secondary{background:var(--paper);color:var(--accent)}.stage{background:var(--paper);border:1px solid var(--line);border-top:7px solid var(--accent);border-radius:14px;padding:clamp(20px,4vw,42px);margin-block:0 24px;box-shadow:0 8px 24px #1d294108}.stage[hidden]{display:none}.stage li{margin-block:14px;padding-left:7px}.stage ol{padding-left:25px}.source-board{border-left:5px solid var(--accent);padding:16px 24px;background:#eef2f5;margin-block:20px}.source-label{font-size:.78rem;line-height:1.4;font-weight:800;color:var(--muted)}.source-board p:not(.source-label){font-size:1.15rem}.prompt,.notice{background:#f8edd8;padding:14px 20px;border-radius:8px}.decision{border:0;padding:0;margin:0}.decision legend{font-size:1.4rem;font-weight:700;margin-bottom:20px}.decision label{display:flex;align-items:flex-start;gap:15px;padding:17px;border:2px solid var(--line);border-radius:8px;cursor:pointer;margin-block:12px}.decision input{margin-top:9px;min-width:22px;min-height:22px;accent-color:var(--accent)}.decision label:has(input:checked){border-color:var(--accent);background:var(--wash)}label{display:block;font-weight:700}textarea{display:block;width:100%;max-width:100%;min-height:100px;border:2px solid var(--line);border-radius:8px;background:white;padding:12px;margin-block:8px 22px;resize:vertical}.stage-nav{display:flex;position:relative;bottom:auto;z-index:20;align-items:center;gap:12px;flex-wrap:wrap;padding:14px;background:#edf3f4f5;border:1px solid var(--line);border-radius:12px;backdrop-filter:blur(10px)}.stage-nav[hidden]{display:none}.stage-nav select{flex:1;min-width:0;border:2px solid var(--line);border-radius:8px;background:white;padding:12px;color:var(--ink)}.stage-status{font-size:.8rem;margin:0;width:100%;text-align:center;color:var(--muted)}button:disabled{opacity:.5;cursor:default}.teacher-guide{margin-block:40px}.teacher-guide details,.answer{border:1px solid var(--line);padding:16px 22px;border-radius:10px;background:var(--paper);margin-block:12px}summary{min-height:44px;cursor:pointer;font-weight:700;padding-block:8px}.answer-letter{font-size:2rem;font-weight:800;color:var(--accent)}.teacher-guide a{overflow-wrap:anywhere}.lesson-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.lesson-card{background:var(--paper);border:1px solid var(--line);border-top:6px solid var(--accent);border-radius:12px;padding:24px;display:flex;flex-direction:column;align-items:flex-start}.lesson-card h3 a{color:var(--ink)}.lesson-card .button{margin-top:auto}.pathway-section{margin-block:40px;scroll-margin-top:20px}.pathway-section>h2{border-bottom:1px solid var(--line);padding-bottom:12px}footer{padding-block:30px 50px}.skip{position:absolute;top:0;left:10px;z-index:100;transform:translateY(-120%);background:white;padding:12px}.skip:focus{transform:translateY(0)}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}
@media(max-width:650px){:root{font-size:17px}.wrap{width:calc(100% - 28px)}.topbar{align-items:flex-start;flex-direction:column;gap:8px}.topbar nav{gap:20px}.lesson-intro{padding-top:28px}.downloads{display:grid;grid-template-columns:1fr}.stage-nav{gap:8px;padding:10px}.stage-nav button{padding-inline:10px;font-size:.85rem}.stage-nav select{font-size:.9rem;padding-inline:6px}.stage-nav .stage-status{line-height:1.3}.source-board{padding:12px 15px}.lesson-grid{grid-template-columns:1fr}.lesson-card{padding:22px}.teacher-guide details{padding:12px 16px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}@media print{.site-header,.stage-nav,.downloads,.week-nav,.teacher-guide,.answer,.response-note,footer,.skip{display:none!important}.stage[hidden],.stage{display:block!important;break-inside:avoid;box-shadow:none;background:white;border:0;border-bottom:1px solid #aaa;padding:10mm 0;margin:0}.wrap{width:100%}.lesson-intro{padding-top:0}textarea{border:1px solid #888;min-height:25mm}.stage>label{break-after:avoid;page-break-after:avoid}.stage>label+textarea{break-before:avoid;page-break-before:avoid;break-inside:avoid;page-break-inside:avoid}body{background:white}.stage[data-stage="4"]{display:none!important}.stage[data-stage="2"]{display:none!important}@page{size:A4;margin:12mm}}