:root{--green:#153e35;--ink:#233d35;--muted:#62756e;--cream:#f6f6ee;--line:#dbe4dc;--coral:#bf4d34;--white:#fff;--light:#e7eee3}*{box-sizing:border-box}body{margin:0;color:var(--ink);background:var(--cream);font-family:-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Yu Gothic",sans-serif;line-height:1.85}a{color:inherit;text-underline-offset:4px}button,input,select{font:inherit}button,a{touch-action:manipulation}a:focus-visible,button:focus-visible,select:focus-visible{outline:3px solid #bf4d34;outline-offset:5px}.wrap{max-width:1140px;margin:auto;padding:0 28px}.preview{background:#f9e5d2;color:#633519;font-size:12px;text-align:center;padding:7px 16px}header{border-bottom:1px solid var(--line);background:var(--cream)}.header{display:flex;align-items:center;justify-content:space-between;gap:22px;min-height:88px}.brand{text-decoration:none;font-size:24px;font-weight:850;letter-spacing:1px}.brand small{display:block;font-size:10px;letter-spacing:2px;font-weight:600}header nav{display:flex;gap:27px;font-size:13px;font-weight:700}header nav a{text-decoration:none}.hero{background:var(--green);color:white;padding:68px 0 78px}.hero-grid{display:grid;grid-template-columns:1.3fr .8fr;gap:52px;align-items:center}.eyebrow{font-size:12px;letter-spacing:2px;color:#c5d8c9;font-weight:700}h1{font-size:clamp(32px,4.8vw,56px);line-height:1.45;letter-spacing:-1.5px;margin:20px 0}h1 span{color:#d9e8b7}.hero p{max-width:600px;font-size:14px;color:#e0e9e2}.btn{display:inline-flex;justify-content:center;align-items:center;min-height:50px;padding:12px 25px;border:0;border-radius:7px;background:var(--coral);color:white;text-decoration:none;font-weight:700;font-size:14px;cursor:pointer}.btn.secondary{background:transparent;border:1px solid #8faea2;margin-left:10px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}.hero-actions .secondary{margin:0}.paper{padding:26px;background:#f5f7ed;color:var(--ink);border-radius:16px;transform:rotate(2deg);box-shadow:0 20px 40px #071e2533}.paper-label{font-size:10px;letter-spacing:2px;border-bottom:1px solid #ccd8c8;padding-bottom:12px}.paper h2{font-size:22px;line-height:1.5;margin:18px 0}.paper-row{display:flex;justify-content:space-between;border-top:1px solid #dae2d3;padding:14px 0;font-size:13px}.paper-row b{color:var(--green)}.paper-foot{font-size:11px;color:var(--muted)}.principles{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;padding:27px 0;border-bottom:1px solid var(--line);font-size:13px}.principles b{display:block;font-size:15px}.section{padding:64px 0}.section + .section{border-top:1px solid var(--line)}.section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:26px}.overline{font-size:11px;letter-spacing:2px;font-weight:800;color:var(--muted)}h2{font-size:28px;line-height:1.6;margin:8px 0 12px}h3{font-size:20px;margin:12px 0}p{margin:12px 0}.muted{color:var(--muted);font-size:13px}.purpose-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.purpose{background:white;border:1px solid var(--line);border-radius:10px;padding:22px;text-decoration:none}.purpose .num{font-size:12px;color:var(--muted)}.purpose b{display:block;margin:10px 0}.purpose p{font-size:12px;color:var(--muted)}.purpose:hover{border-color:var(--green);transform:translateY(-2px)}.note{border-left:3px solid var(--coral);padding:12px 18px;background:#fff6ec;font-size:13px}.table-scroll{overflow-x:auto;background:white;border:1px solid var(--line);border-radius:12px}table{border-collapse:collapse;width:100%;min-width:770px;font-size:13px;text-align:left}th{background:#e8ede4;font-size:12px;white-space:nowrap}th,td{padding:18px;border-bottom:1px solid var(--line);vertical-align:top}td strong{font-size:18px;white-space:nowrap}td small{display:block;color:var(--muted);font-size:11px}.tag{display:inline-block;border-radius:20px;background:var(--light);padding:3px 10px;font-size:11px;font-weight:700}.cards{display:grid;grid-template-columns:1fr 1fr;gap:22px}.card{background:white;border:1px solid var(--line);border-radius:12px;padding:28px}.card p{font-size:14px}.text-link{font-size:13px;font-weight:700}.diagnosis{display:grid;grid-template-columns:1fr 1.3fr;gap:45px;align-items:start;background:#e7eee3;border-radius:16px;padding:38px}.diagnosis label{display:block;font-weight:700;font-size:13px;margin:0 0 7px}.diagnosis select{width:100%;background:white;border:1px solid #a8baae;border-radius:6px;padding:12px;margin-bottom:18px}.result{background:white;padding:20px;border-radius:8px;margin-top:18px}footer{background:var(--green);color:white;padding:45px 0 25px}.footer-links{display:flex;flex-wrap:wrap;gap:20px;margin:22px 0;font-size:12px}.footer-small{font-size:11px;color:#c5d8c9}.article{max-width:820px;margin:auto;padding:48px 28px 72px}.article h1{font-size:36px;margin:22px 0}.article h2{font-size:25px;margin-top:35px}.article p,.article li{font-size:15px}.article .table-scroll{margin:20px 0}.breadcrumb{font-size:12px;color:var(--muted)}.meta{display:flex;gap:16px;flex-wrap:wrap;font-size:12px;color:var(--muted)}.skip{position:absolute;left:-9999px}.skip:focus{left:10px;top:10px;background:white;padding:10px;z-index:10}
@media(max-width:760px){.wrap{padding:0 20px}.header{min-height:78px;gap:10px;align-items:center;flex-wrap:wrap;padding-top:15px;padding-bottom:15px}header nav{gap:18px;font-size:11px;white-space:nowrap}.brand{flex-shrink:0}header nav a:last-child{display:none}.brand{font-size:19px}.brand small{font-size:8px}.hero{padding:40px 0}.hero-grid{grid-template-columns:1fr;gap:30px}.paper{max-width:450px;transform:none}.principles{gap:15px;font-size:11px}.principles b{font-size:12px}.purpose-grid{grid-template-columns:1fr 1fr}.purpose{padding:18px}.section{padding:40px 0}.section-head{display:block}h2{font-size:24px}.cards,.diagnosis{grid-template-columns:1fr}.diagnosis{gap:12px;padding:24px}.article{padding:30px 20px 50px}.article h1{font-size:29px}.hero-actions .btn{flex:1}.hero-actions .btn.secondary{flex:1}.footer-links{gap:13px}}

.school-cta{margin:24px 0}.school-cta .btn{max-width:100%;white-space:normal}.table-scroll .school-cta{margin:12px 0}.table-scroll .school-cta .btn{font-size:12px;padding:8px 12px}.toc{display:block;margin:28px 0;padding:20px 24px;background:#eee5cf;border:1px solid #dac6a4;border-radius:12px;font-size:14px;font-weight:400}.toc p{margin:0 0 12px}.toc ol{margin:0;padding-left:1.7em}.article .toc li{font-size:14px;margin:8px 0;line-height:1.7}.toc a{display:inline;color:var(--green);text-decoration:underline;overflow-wrap:anywhere}
.contact-fields{border:1px solid #deceb1;background:#fffbf2;border-radius:16px;padding:24px}.contact-fields label{display:block;margin-top:18px;font-size:14px;font-weight:700}.contact-fields input,.contact-fields textarea{display:block;width:100%;padding:12px;border:1px solid #c0af90;border-radius:6px;background:#fffdf7;font:inherit}.contact-fields .btn:disabled{opacity:.55;cursor:default}
/* Shared classroom palette. The supplied image is reused without image generation. */
:root{--green:#344c3b;--ink:#3e392f;--muted:#716d60;--cream:#faf4e7;--line:#dfd4bd;--coral:#9e4f2e;--light:#ebe8d8}
body{background:radial-gradient(ellipse at 15% 5%,#fffaf0 0,transparent 55%),var(--cream)}header{background:#fff8ec;border-bottom:4px solid #bb9467}.brand{color:#344c3b}.preview{background:#ead9bd;color:#56402a}.hero{background:radial-gradient(ellipse at 80% 30%,#546447 0,transparent 65%),#344c3b;border-bottom:8px solid #b88b58;padding:52px 0 58px}.hero-grid{grid-template-columns:.85fr 1.15fr;gap:34px}.hero h1{font-size:clamp(29px,3.3vw,43px);letter-spacing:-1px}.hero h1 span{color:#f4dcad}.hero p{color:#f7efdf}.eyebrow{color:#e5d8b9}.classroom-frame{margin:0;background:#ddbc8a;border:9px solid #bd9361;border-radius:18px;box-shadow:0 14px 38px #17241955;overflow:hidden}.classroom-frame img{display:block;width:100%;height:auto}.classroom-frame figcaption{padding:10px 15px;color:#4e3925;font-size:12px;background:#f6e4c4}.principles{background:#f6eedf;padding-left:20px;padding-right:20px;border-radius:0 0 12px 12px}.purpose,.card{background:#fffbf2;border-color:#deceb1;border-radius:16px;box-shadow:0 4px 0 #e6d9c1}.purpose .num{color:#946c46}.overline{color:#796348}.table-scroll{border-color:#cdbc9b;background:#fffcf6;box-shadow:0 4px 0 #e6d9c1}th{background:#e9e8d9;color:#344c3b}th,td{border-color:#e5dbc5}.note{background:#f7ead5;border-left-color:#ae7640}.diagnosis{background:#eee5cf;border:1px solid #dac6a4;box-shadow:inset 0 0 0 5px #f8f1e4}.diagnosis select{background:#fffcf6;border-color:#c0af90}.result{background:#fffcf6}.article{max-width:850px}.chapter-banner{background:#eee4cd;border-bottom:1px solid #d5c29f}.chapter-inner{display:flex;align-items:center;gap:22px;min-height:116px}.chapter-inner img{width:112px;height:78px;object-fit:cover;object-position:12% 40%;border:4px solid #bb9467;border-radius:12px}.chapter-inner p{font-size:14px;margin:0}.chapter-inner small{display:block;color:var(--muted);font-size:12px}footer{background:#344c3b;border-top:7px solid #b88b58}footer .brand{color:#fff8ec}.footer-small{color:#e5dcc6}.btn{box-shadow:0 3px 0 #773f26;border-radius:10px}.btn.secondary{box-shadow:none;border-color:#d2c3a5}.tag{background:#e8e5d3}
@media(max-width:760px){.hero{padding:32px 0 38px}.hero-grid{grid-template-columns:1fr;gap:25px}.hero h1{font-size:33px}.classroom-frame{border-width:6px}.chapter-inner{gap:15px;min-height:103px}.chapter-inner img{width:86px;height:65px}.chapter-inner p{font-size:12px}.principles{padding-left:10px;padding-right:10px;gap:12px}.btn{font-size:13px;padding:12px 18px}}