*{box-sizing:border-box}body{margin:0;color:#25372f;background:#faf9f5;font-family:"Hiragino Kaku Gothic ProN","Yu Gothic",sans-serif;line-height:1.85}a{color:inherit}header{max-width:1180px;margin:auto;padding:28px 32px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid #d9dfd7;gap:20px}.brand{text-decoration:none;font-size:22px;font-weight:700;letter-spacing:.07em}.brand span{display:block;font-size:11px;font-weight:400;letter-spacing:.13em;color:#68766c}nav{display:flex;gap:24px;font-size:13px}nav a{text-decoration:none}main{max-width:1120px;margin:auto;padding:0 32px 70px}h1,h2,h3{line-height:1.5;margin:0 0 20px}h1{font-family:"Hiragino Mincho ProN","Yu Mincho",serif;font-weight:600;font-size:38px}h2{font-size:24px}h3{font-size:18px}.hero{padding:70px 0 56px;max-width:850px}.hero h1{font-size:48px;letter-spacing:.06em}.eyebrow{font-size:12px;letter-spacing:.09em;color:#64745d;font-weight:600}.lead{font-size:17px;line-height:2}.hero-meta{display:flex;gap:12px;flex-wrap:wrap;margin-top:25px}.hero-meta span{border:1px solid #cdd6c7;border-radius:30px;padding:5px 16px;font-size:12px}section{margin-bottom:55px}.filters{background:#eaf0e7;border-radius:14px;padding:24px;display:grid;grid-template-columns:2fr 1fr 1fr 1.4fr;gap:14px}label{display:block;font-size:12px;font-weight:600}input,select{display:block;width:100%;height:48px;margin-top:8px;padding:0 12px;border:1px solid #bfccbb;border-radius:6px;background:#fff;color:#25372f;font:inherit;font-size:14px}input:focus,select:focus{outline:2px solid #64816d;outline-offset:2px}.count{min-height:30px;font-size:13px;color:#697669;margin:16px 0}.unit-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.unit{display:flex;flex-direction:column;padding:25px;border:1px solid #dce2d6;background:white;border-radius:10px;text-decoration:none;transition:background .15s}.unit:hover{background:#f0f5ed}.unit h3{margin:12px 0 16px}.muted{font-size:13px;color:#667267}.unit-arrow{font-size:12px;color:#466a50;margin-top:auto;padding-top:25px}.more{display:block;margin:28px auto 0;min-width:190px;min-height:48px;border:1px solid #587260;border-radius:6px;background:transparent;color:#365a40;font-size:14px;cursor:pointer}.more[hidden],[hidden]{display:none!important}.explain{border-top:1px solid #d7dfd3;padding-top:40px;max-width:780px}.back{display:inline-block;margin-top:30px;font-size:13px;text-decoration:none}.intro{padding-top:38px;max-width:880px}.downloads{display:grid;grid-template-columns:1fr 1fr;gap:14px}.download{display:flex;justify-content:space-between;gap:12px;align-items:center;text-decoration:none;border:1px solid #b6c8b5;border-radius:8px;background:#fff;padding:20px;font-weight:600}.download small{font-weight:400;white-space:nowrap;color:#56705d;font-size:11px}.note{font-size:13px;color:#647065;margin-top:22px}.membership{background:#edf1e8;padding:26px 30px;border-radius:10px;margin-bottom:55px}.membership h2{font-size:20px;margin-bottom:8px}.membership p{font-size:14px;margin:0}.books-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}.book{border:1px solid #d9dfd2;background:white;border-radius:10px;padding:28px}.book h3{margin:8px 0}.book p{font-size:14px}.book small{display:block;margin-top:12px;color:#7b8279;font-size:11px}.textlink{color:#385e43;text-underline-offset:4px;font-size:14px}.notice{color:#795a29}.book-search{max-width:600px;margin-top:28px}.sources{font-size:12px;overflow-wrap:anywhere}.sources h2{font-size:19px}.sources li{margin-bottom:12px}.prose{max-width:760px;margin:55px auto}.prose h2{margin-top:38px;font-size:23px}.prose p{font-size:16px}footer{border-top:1px solid #d9dfd7;max-width:1180px;margin:auto;padding:25px 32px 35px;font-size:12px;color:#647365}footer small{display:block;margin-top:20px}.empty{min-height:180px;grid-column:1/-1}a:focus-visible,button:focus-visible{outline:2px solid #547459;outline-offset:4px}@media(max-width:760px){header{padding:20px;display:block}nav{gap:18px;margin-top:14px;font-size:11px}main{padding:0 20px 40px}.hero{padding:42px 0 35px}.hero h1{font-size:35px}h1{font-size:28px}h2{font-size:22px}.lead{font-size:15px}.filters{grid-template-columns:1fr 1fr;padding:17px;gap:12px}.filters .search{grid-column:1/-1}.filters label:last-child{grid-column:1/-1}.unit-grid,.books-grid,.downloads{grid-template-columns:1fr}.unit{padding:22px}.intro{padding-top:25px}.download{padding:18px;display:block}.download small{display:block;margin-top:5px}.book{padding:23px}.membership{padding:23px}section{margin-bottom:38px}.prose{margin:35px auto}.prose p{font-size:15px}footer{padding:25px 20px}}
.a8-ad{width:min(340px,calc(100% - 40px));height:auto;min-height:110px;margin:30px auto;padding:16px;overflow:auto;border:1px solid #d9dfd2}.a8-ad small{display:block;font-size:11px;margin-bottom:10px}.a8-creative{overflow:auto;max-height:265px}.display-ad{width:320px;height:290px;margin:30px auto;text-align:center;overflow:hidden}.ad-label{display:block;height:26px;font-size:11px;color:#68766c}.book-ad{min-height:72px;margin-top:18px;padding-top:10px;border-top:1px solid #d9dfd2}.book-ad small{font-size:11px;margin:0 0 5px}.book-ad a{font-size:14px;color:#385e43}

.worksheet-prompt{width:100%;min-height:320px;resize:vertical;padding:18px;font:inherit;font-size:14px;line-height:1.8;border:1px solid #cdd6c7;border-radius:8px;background:#fff}.breadcrumbs{margin:24px 0 0;font-size:12px;display:block}.breadcrumbs ol{display:flex;flex-wrap:wrap;gap:7px;padding:0;list-style:none}.breadcrumbs li:not(:last-child)::after{content:"›";padding-left:7px;color:#899184}.breadcrumbs a{color:#536c58}.browse-index{margin:0 0 36px}.index-links{display:flex;flex-wrap:wrap;gap:10px;margin:12px 0}.index-links a{display:block;border:1px solid #cdd6c7;border-radius:6px;padding:8px 18px;text-decoration:none}.static-list{margin-top:20px}header nav{flex-wrap:wrap}@media(max-width:760px){header nav{gap:10px 15px}.breadcrumbs{font-size:11px}.index-links a{padding:7px 14px}}

/* Friendly material library. Japanese type, restrained color, useful density. */
:root{--ink:#243648;--body:#334452;--muted:#5d6b75;--accent:#286b83;--accent-soft:#edf5f7;--coral:#b95842;--line:#dde3e5;--paper:#fff;--canvas:#fbfaf7;--soft:#f4f6f6;--sans:"Hiragino Kaku Gothic ProN","Yu Gothic","Noto Sans JP",sans-serif;--serif:"Hiragino Mincho ProN","Yu Mincho","Noto Serif JP",serif}
*{box-sizing:border-box}html{scroll-padding-top:24px}body{margin:0;background:var(--canvas);color:var(--body);font:16px/1.8 var(--sans)}a{color:var(--accent);text-underline-offset:4px}a:visited{color:#52617d}a:hover{text-decoration-thickness:2px}h1,h2,h3,p,a{word-break:normal;overflow-wrap:break-word;line-break:strict}h1,h2,h3{font-family:var(--sans);color:var(--ink);font-weight:700;line-height:1.5;letter-spacing:0;margin:0 0 18px}h1{font-size:36px}h2{font-size:24px}h3{font-size:19px}p{margin:0 0 1em}main{max-width:1220px;margin:0 auto;padding:0 40px 64px}section{margin-bottom:40px}.lead{max-width:800px;font-size:16px;line-height:1.9}.eyebrow{font-size:12px;font-weight:700;color:var(--accent);letter-spacing:.015em;line-height:1.7}.muted,.count,.note{color:var(--muted)}.note{font-size:13px;line-height:1.9;margin-top:18px}.count{font-size:13px;min-height:24px;margin:16px 0}.affiliate-disclosure,.ad-disclosure{color:var(--muted);font-size:11px;line-height:1.7}.keep-phrase{white-space:nowrap}[hidden]{display:none!important}
/* A white header lets the QR codes remain clear without a dominant dark slab. */
.site-header,.site-footer{display:block;max-width:none;padding:16px 40px;border:0;background:#fff;color:var(--body)}.site-header{border-bottom:1px solid var(--line)}.site-header-inner,.site-footer-inner{max-width:1140px;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:32px}.site-brand-nav,.footer-info{flex:1;min-width:0}.brand,.brand:visited{display:inline-block;font-size:28px;line-height:1.4;font-weight:700;letter-spacing:.015em;color:var(--ink);text-decoration:none}.brand span{display:block;font-size:12px;font-weight:400;letter-spacing:0;color:var(--muted);margin-top:6px}.site-header nav,.site-footer nav{display:flex;flex-wrap:wrap;gap:0 25px;font-size:14px;margin-top:16px}.site-header nav a,.site-footer nav a{display:flex;align-items:center;min-height:40px;color:var(--body);text-decoration:none;border-bottom:2px solid transparent}.site-header nav a[aria-current=page]{border-bottom-color:var(--coral);color:var(--ink);font-weight:700}.site-header nav a:hover,.site-footer nav a:hover{color:var(--accent);text-decoration:underline}.social-links{display:flex;gap:16px;flex-shrink:0}.social-qr,.social-qr:visited{display:flex;flex-direction:column;align-items:center;width:136px;padding:4px;background:#fff;color:var(--ink);border:0;border-radius:0;text-decoration:none;text-align:center;gap:2px}.social-qr img{display:block;width:128px;height:128px;max-width:none;image-rendering:auto}.social-label{font-size:12px;line-height:1.5;font-weight:700}.social-description{display:block;font-size:10px;line-height:1.5;font-weight:400;color:var(--muted);margin-top:1px}.site-footer{border-top:1px solid var(--line);padding-top:28px;padding-bottom:28px}.site-footer nav{font-size:13px;gap:0 20px}.footer-info p{font-size:13px;color:var(--muted);max-width:550px;margin:16px 0 0}.site-footer small{display:block;font-size:11px;color:var(--muted);margin-top:14px}.site-footer .amazon-disclosure{color:var(--muted)}
/* A short introduction, then six equally weighted entrances across the page. */
.home-page main{display:block}.home-page main>.affiliate-disclosure{margin-top:14px;margin-bottom:0}.home-page main>.hero{padding:30px 0 24px;margin:0;max-width:none}.hero-copy>.eyebrow{margin-bottom:10px}.hero-copy h1{font-family:var(--sans);font-size:42px;line-height:1.45;letter-spacing:-.025em;margin:0 0 14px}.hero-copy h1 .keep-phrase{display:inline}.hero-copy h1>wbr{display:none}.hero-copy .lead{max-width:850px;margin-bottom:0;font-size:15px;line-height:1.85}.hero-summary{display:flex;gap:22px;margin-top:16px;font-size:12px;color:var(--muted);padding:0;border:0}.hero-summary strong{display:inline;margin-right:5px;font-size:17px;line-height:1.5;color:var(--ink);font-weight:700;font-variant-numeric:tabular-nums}.home-page main>.grade-first{margin:0 0 28px;padding:0;background:transparent;border:0}.grade-first h2{font-size:16px;margin:0 0 12px}.grade-entries{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:12px}.grade-entry,.grade-entry:visited{display:flex;flex-direction:column;gap:12px;min-width:0;padding:20px 18px 16px;border:1px solid #ccdbe1;border-radius:12px;background:#fff;color:var(--ink);text-decoration:none;box-shadow:0 2px 3px #24364805}.grade-entry:hover{background:var(--accent-soft);border-color:var(--accent)}.grade-number{color:var(--accent);font-size:43px;font-weight:700;line-height:1.15;font-variant-numeric:tabular-nums}.grade-number>span{font-size:14px;color:var(--ink);margin-left:5px}.grade-entry-detail{display:flex;align-items:center;justify-content:space-between;gap:5px;font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums}.grade-entry-detail>span{font-size:19px;color:var(--accent);line-height:1}.subject-entry-row{display:flex;align-items:center;gap:24px;margin-top:18px}.subject-entry-row h2{flex-shrink:0;font-size:13px;font-weight:400;color:var(--muted);margin:0}.subject-entries{display:flex;flex-wrap:wrap;gap:10px}.subject-entries>a{display:flex;align-items:center;justify-content:space-between;gap:22px;min-height:40px;padding:8px 16px;font-size:14px;color:var(--ink);background:#fff;border:1px solid var(--line);border-radius:6px;text-decoration:none}.subject-entries>a:hover{border-color:var(--accent);color:var(--accent)}.mobile-material-preview,.material-preview{display:none}
/* Searching feels like a familiar tool rather than a second dark hero. */
.catalog{padding:24px 26px;border:1px solid var(--line);border-radius:12px;background:#f1f5f5;color:var(--body);margin-bottom:36px}.catalog h2{color:var(--ink);font-size:21px;margin-bottom:18px}.filters{display:grid;grid-template-columns:2fr 1fr 1fr 1.3fr;gap:16px;padding:0;border:0;background:transparent}.filters label{display:block;font-size:12px;font-weight:700;color:var(--body)}input,select{display:block;width:100%;height:48px;margin-top:7px;padding:0 12px;border:1px solid #b9c9cf;border-radius:6px;background:#fff;color:var(--body);font:400 15px var(--sans)}input:focus,select:focus{outline:3px solid #85b6c8;outline-offset:2px}.catalog .count{color:var(--muted);margin-bottom:0}.catalog .unit-grid:not(:empty){margin-top:18px}.more,.search-reset{display:block;min-width:190px;min-height:46px;padding:10px 20px;margin:24px auto 0;border:1px solid var(--accent);border-radius:6px;background:#fff;color:var(--accent);font:700 14px var(--sans);cursor:pointer}.more:hover,.search-reset:hover{background:var(--accent-soft)}.empty{grid-column:1/-1;min-height:0;padding:20px;background:#fff;color:var(--body);border-radius:6px}.empty .search-reset{margin:16px 0 0}
/* Lists use consistent reading order and a small amount of structural chrome. */
.unit-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;background:transparent}.unit,.unit:visited{display:flex;flex-direction:column;min-width:0;padding:22px;background:#fff;color:var(--ink);border:1px solid var(--line);border-radius:10px;box-shadow:none;text-decoration:none}.unit:hover{background:#f7fbfc;border-color:#93b6c5;box-shadow:none}.unit h3{font-size:19px;line-height:1.65;margin:10px 0 18px}.unit .eyebrow,.unit .muted{font-size:12px}.unit-meta{display:flex;gap:5px 10px;flex-wrap:wrap}.unit-publisher{margin-top:4px}.unit-arrow{display:block;font-size:13px;font-weight:700;color:var(--accent);margin-top:auto;padding-top:10px}.index-links{display:flex;flex-wrap:wrap;gap:10px;margin:12px 0}.index-links a{display:block;min-height:42px;padding:9px 18px;background:#fff;color:var(--ink);border:1px solid var(--line);border-radius:6px;text-decoration:none}.index-links a:hover{border-color:var(--accent)}.explain{display:block;max-width:none;padding:24px 0;border-top:1px solid var(--line);margin-bottom:20px}.explain h2{font-family:var(--sans);font-size:23px}.explain p{max-width:880px;font-size:15px}.explain .textlink{display:inline-block}.learning-resources,.family-services{padding:28px;background:#fff;border:1px solid var(--line);border-radius:12px}.learning-resources>p,.family-services>p{max-width:840px}.resource-links{display:grid;grid-template-columns:1fr 1fr;gap:16px}.family-services>.books-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.family-service{background:var(--soft)!important;border:1px solid var(--line)!important}.family-service h3{font-size:19px}.family-service p{font-size:14px}.a8-creative{overflow:auto;max-width:100%}
.breadcrumbs{display:block;font-size:12px;color:var(--muted);margin:20px 0 0}.breadcrumbs ol{display:flex;flex-wrap:wrap;gap:7px;list-style:none;padding:0}.breadcrumbs li:not(:last-child)::after{content:'›';padding-left:7px}.breadcrumbs a{color:var(--muted)}.back{display:inline-block;font-size:13px;text-decoration:none;margin-top:8px}.intro{max-width:none;padding:28px 0 24px;margin:0 0 28px;border:0;border-bottom:1px solid var(--line)}.intro h1{font-size:34px;max-width:970px}.intro .lead{max-width:820px;font-size:16px}.detail-materials{padding:26px;background:#fff;border:1px solid var(--line);border-radius:12px}.detail-materials h2{font-size:22px}.detail-materials>p{font-size:14px}.downloads{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:20px}.download,.download:visited{display:block;min-height:80px;padding:16px;background:var(--accent-soft);color:var(--ink);border:1px solid #c4dce5;border-radius:7px;font-size:16px;font-weight:700;text-decoration:none}.download:hover{border-color:var(--accent);text-decoration:underline}.download small{display:block;font-size:11px;font-weight:400;white-space:normal;line-height:1.6;color:var(--muted);margin-top:6px}.downloads .download:first-child{background:var(--accent);color:#fff;border-color:var(--accent)}.downloads .download:first-child small{color:#fff}.download-ordinal{font-size:12px;color:var(--muted)}.books-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.book{display:flex;flex-direction:column;min-width:0;padding:24px;background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:none}.book>.eyebrow{font-size:12px}.book h3{font-size:19px;line-height:1.65;margin:10px 0 12px}.book p{font-size:14px;line-height:1.9}.book>.textlink{margin-top:auto;padding-top:8px;font-size:13px}.book small{font-size:11px;color:var(--muted)}.book-ad{padding-top:12px;margin-top:16px;border-top:1px solid var(--line);min-height:60px}.book-ad small{display:block;font-size:11px;margin-bottom:3px}.book-ad a{display:inline-flex;align-items:center;min-height:36px;font-size:14px;font-weight:700;color:var(--accent)}.book-search{max-width:640px;margin-top:20px}.textlink{font-size:14px;color:var(--accent)}.notice{color:#815622}.amazon-disclosure{font-size:12px}.membership{padding:24px;background:var(--soft);border:1px solid var(--line);border-radius:10px}.membership h2{font-size:21px}.membership p{font-size:14px}.sources{padding:22px 0;border-top:1px solid var(--line);font-size:12px;overflow-wrap:anywhere}.sources h2{font-size:20px}.sources li{margin-bottom:12px}.prose{max-width:860px;margin:32px auto;padding:32px;background:#fff;border:1px solid var(--line);border-radius:12px}.prose h2{font-size:24px;margin-top:32px}.prose p{font-size:16px}.worksheet-prompt{width:100%;min-height:300px;padding:20px;resize:vertical;border:1px solid var(--line);background:#fff;color:var(--body);font:14px/1.9 var(--sans)}.a8-ad{background:#fff;border:1px solid var(--line);font-size:14px}.ad-label{color:var(--muted)}a:focus-visible,button:focus-visible{outline:3px solid #85b6c8;outline-offset:4px}
/* Unit titles and PDF choices share the first view without squeezing the names. */
.unit-page main{display:grid;grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr);gap:0 32px;align-items:start}.unit-page main>*{grid-column:1/-1}.unit-page main>.intro{grid-column:1;border:0;margin-bottom:32px}.unit-page main>.detail-materials{grid-column:2;margin-top:28px}.unit-page .intro h1{font-size:30px;line-height:1.6}.unit-title-part{display:block}
@media(max-width:1100px){main{padding:0 28px 56px}.site-header,.site-footer{padding-left:28px;padding-right:28px}.site-header-inner,.site-footer-inner{gap:24px}.brand{font-size:26px}.site-header nav{gap:0 18px}.grade-entries{grid-template-columns:repeat(3,minmax(0,1fr))}.grade-entry{flex-direction:row;align-items:center;justify-content:space-between;padding:18px 20px}.grade-entry-detail{min-width:64px}.grade-number{font-size:38px}.filters{grid-template-columns:1.5fr 1fr 1fr}.filters .search{grid-column:1/-1}.unit-grid,.books-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.unit-page main{column-gap:24px}.unit-page .intro h1{font-size:28px}.downloads{grid-template-columns:1fr}}
@media(max-width:800px){main{padding:0 24px 48px}.site-header,.site-footer{padding:16px 24px}.site-header-inner,.site-footer-inner{display:block}.brand{font-size:25px}.brand span{margin-top:3px;font-size:11px}.site-header nav,.site-footer nav{margin-top:8px;gap:0 20px;font-size:13px}.social-links{margin-top:10px;gap:16px}.site-header .social-description{font-size:9px}.home-page main>.hero{padding:24px 0 20px}.hero-copy h1{font-size:33px;line-height:1.5}.hero-copy .lead{font-size:14px}.hero-summary{display:none}.grade-entry{padding:16px;gap:10px}.grade-number{font-size:36px}.catalog{padding:22px}.filters{grid-template-columns:1fr 1fr;gap:12px}.filters .search,.filters label:last-child{grid-column:1/-1}.unit-grid,.books-grid{gap:14px}.unit,.book{padding:20px}.learning-resources,.family-services{padding:24px}.family-services>.books-grid{grid-template-columns:1fr}.intro h1{font-size:29px}.unit-page main{display:block}.unit-page main>.detail-materials{margin-top:0}.unit-page .intro h1{font-size:29px}.downloads{grid-template-columns:1fr 1fr}.prose{padding:28px}.site-footer .social-links{margin-top:18px}}
@media(max-width:560px){main{padding:0 20px 40px}.site-header,.site-footer{padding:12px 20px}.brand{font-size:24px}.site-header nav,.site-footer nav{gap:0 17px;font-size:12px;margin-top:6px}.site-header nav a,.site-footer nav a{min-height:36px}.social-links{gap:12px;margin-top:8px}.social-qr{width:136px;padding:4px}.social-label{font-size:11px}.social-description{font-size:9px}.home-page main>.affiliate-disclosure{margin-top:10px;font-size:10px}.home-page main>.hero{padding:16px 0}.hero-copy>.eyebrow{display:none}.hero-copy h1{font-size:27px;line-height:1.5;margin-bottom:10px}.hero-copy .lead{font-size:13px;line-height:1.8}.home-page main>.grade-first{margin-bottom:24px}.grade-first h2{font-size:14px;margin-bottom:10px}.grade-entries{gap:8px}.grade-entry{flex-direction:column;align-items:stretch;padding:12px 11px;gap:8px;border-radius:9px}.grade-number{font-size:34px}.grade-number>span{font-size:12px;margin-left:3px}.grade-entry-detail{font-size:11px;min-width:0}.grade-entry-detail>span{font-size:16px}.subject-entry-row{display:block;margin-top:14px}.subject-entry-row h2{font-size:11px;margin-bottom:7px}.subject-entries{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:7px}.subject-entries>a{font-size:12px;min-height:36px;padding:7px 9px;gap:3px}.catalog{padding:20px 16px;margin-bottom:28px}.catalog h2{font-size:19px}.unit-grid,.books-grid,.downloads,.resource-links{grid-template-columns:1fr}.unit h3,.book h3{font-size:19px}.intro{padding:24px 0 20px}.intro h1,.unit-page .intro h1{font-size:27px}.intro .lead{font-size:15px}.detail-materials{padding:22px 18px}.detail-materials h2{font-size:21px}.download{padding:16px;font-size:16px;min-height:74px}.learning-resources,.family-services{padding:22px 18px}.explain{padding-top:22px}.explain h2{font-size:21px}.explain p{font-size:14px}.prose{padding:24px 20px;margin-top:24px}.prose h1{font-size:27px}.prose h2{font-size:22px}.membership{padding:22px 18px}.site-footer{padding-top:24px;padding-bottom:24px}section{margin-bottom:32px}}
@media(max-width:359px){main{padding-left:14px;padding-right:14px}.site-header,.site-footer{padding-left:14px;padding-right:14px}.site-header nav{gap:0 13px;font-size:11px}.brand{font-size:23px}.hero-copy h1{font-size:25px}.grade-entry{padding:12px 8px}.grade-number{font-size:30px}.grade-number>span{font-size:11px}.subject-entries>a{padding:7px 5px;font-size:11px}.catalog{padding:20px 14px}.intro h1,.unit-page .intro h1{font-size:25px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
/* Saved-reference composition: Nord Moss photo hero, then the useful entrances. */
.home-page main>.hero{position:relative;min-height:360px;padding:0;margin:22px 0 26px;overflow:hidden;background:#fff}.hero-photo{display:block;width:100%;height:360px;object-fit:cover;object-position:50% 65%}.hero-copy{position:absolute;left:28px;bottom:28px;width:min(510px,calc(100% - 56px));padding:24px 28px;background:#fffffff2}.hero-copy h1{font-size:34px;line-height:1.5;margin-bottom:12px}.hero-copy h1 .keep-phrase{display:block}.hero-copy .lead{font-size:14px;line-height:1.85}.hero-copy>.eyebrow{font-size:11px;margin-bottom:8px}.hero-summary{display:none}.hero-photo-caption{position:absolute;right:18px;top:16px;font-size:10px;line-height:1.6;padding:3px 7px;background:#ffffffe8;color:var(--body)}.library-photo-strip{margin:24px 0 0;position:relative;overflow:hidden;background:#fff}.library-photo-strip img{display:block;width:100%;height:130px;object-fit:cover;object-position:50% 70%}.library-photo-strip figcaption{position:absolute;right:12px;bottom:10px;padding:2px 7px;background:#ffffffe8;color:var(--body);font-size:10px}.unit-page main>.library-photo-strip{grid-column:1/-1}.photo-credit{font-size:10px;line-height:1.8;color:var(--muted);margin-top:14px;max-width:580px}.photo-credit a{color:var(--muted)}
@media(max-width:800px){.home-page main>.hero{margin-top:18px;min-height:0}.hero-photo{height:300px}.hero-copy{left:20px;bottom:20px;width:calc(100% - 40px);max-width:470px;padding:20px 24px}.hero-copy h1{font-size:29px}.library-photo-strip img{height:100px}}
@media(max-width:560px){.home-page main>.hero{margin:14px 0 22px;overflow:visible;background:transparent}.hero-photo{height:220px;object-position:50% 65%}.hero-copy{position:static;width:100%;max-width:none;padding:15px 0 0;background:transparent}.hero-copy h1{font-size:27px;line-height:1.5;margin-bottom:9px}.hero-copy h1 .keep-phrase{display:inline}.hero-copy .lead{display:none}.hero-photo-caption{top:10px;right:10px;font-size:9px}.grade-entries{gap:0;border-top:1px solid #c5d8e0;border-left:1px solid #c5d8e0}.grade-entry,.grade-entry:visited{border:0;border-bottom:1px solid #c5d8e0;border-right:1px solid #c5d8e0;border-radius:0;box-shadow:none;padding:14px 12px;background:#fff}.grade-number{font-size:32px}.library-photo-strip{margin-top:18px}.library-photo-strip img{height:86px}.library-photo-strip figcaption{font-size:9px}.photo-credit{font-size:9px;max-width:100%}}
/* Photo-led revision: full-width scene, shared rules, fewer enclosing boxes. */
.home-page main{max-width:none;padding-left:0;padding-right:0}.home-page main>*{width:calc(100% - 80px);max-width:1140px;margin-left:auto;margin-right:auto}.home-page main>.hero{width:100%;max-width:none;min-height:430px;margin:18px 0 28px}.hero-photo{height:430px;object-position:50% 65%}.hero-copy{left:max(40px,calc((100% - 1140px)/2));bottom:36px;padding:0;width:510px;max-width:calc(100% - 80px);background:transparent;color:#fff;text-shadow:0 1px 4px #0009}.hero-copy h1,.hero-copy .eyebrow,.hero-copy .lead{color:#fff}.hero-copy h1{font-size:38px;line-height:1.5}.hero-copy .lead{font-size:15px;max-width:480px}.hero-photo-caption{background:#ffffffeb}.grade-entries{gap:0;border-top:1px solid #bfd3dc;border-left:1px solid #bfd3dc}.grade-entry,.grade-entry:visited{border:0;border-bottom:1px solid #bfd3dc;border-right:1px solid #bfd3dc;border-radius:0;box-shadow:none;background:#fff;padding:18px 20px}.grade-entry:hover{background:var(--accent-soft)}.catalog{border:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);border-radius:0;background:transparent;padding:24px 0}.learning-resources,.family-services{padding:28px 0;background:transparent;border:0;border-top:1px solid var(--line);border-radius:0}.family-service{padding:18px 0;background:transparent!important;border:0!important;border-top:1px solid var(--line)!important;border-radius:0}.family-services>.books-grid{column-gap:32px}.explain{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:0 36px;padding:28px 0;border-top:1px solid var(--line)}.explain-photo{display:block;width:100%;height:300px;object-fit:cover;object-position:50% 70%;grid-column:1;grid-row:1/4}.explain h2,.explain p,.explain .textlink{grid-column:2}.explain h2{margin:12px 0 16px;font-size:24px}.explain p{align-self:start}.explain .textlink{justify-self:start;align-self:start}.audiobook-ad,.a8-ad{max-width:none;width:100%;min-height:0;height:auto;margin:20px 0;padding:18px 0;background:transparent;border:0;border-top:1px solid var(--line);border-radius:0}.a8-creative{max-height:none}.audio-resources,.audiobook-resources{border:0;border-top:1px solid var(--line);padding:24px 0;background:transparent;border-radius:0}
@media(max-width:1100px){.home-page main>*{width:calc(100% - 56px)}.hero-copy{left:28px}.grade-entry{padding:18px 20px}.explain{gap:0 26px}.explain-photo{height:320px}}
@media(max-width:800px){.home-page main>*{width:calc(100% - 48px)}.home-page main>.hero{min-height:0}.hero-photo{height:340px}.hero-copy{left:24px;bottom:24px;width:470px;max-width:calc(100% - 48px)}.hero-copy h1{font-size:32px}.hero-copy .lead{font-size:14px}.explain{display:block}.explain-photo{height:280px;margin-bottom:22px}.explain h2{margin-top:0}.a8-ad{width:100%}}
@media(max-width:560px){.home-page main>*{width:calc(100% - 40px)}.home-page main>.hero{margin:14px 0 22px}.hero-photo{height:220px;object-position:50% 65%}.hero-copy{position:static;width:calc(100% - 40px);max-width:none;margin:0 auto;padding:15px 0 0;color:var(--ink);text-shadow:none}.hero-copy h1,.hero-copy .eyebrow,.hero-copy .lead{color:var(--ink)}.hero-copy h1{font-size:27px;line-height:1.5}.hero-copy .lead{display:none}.grade-entry,.grade-entry:visited{padding:14px 12px}.explain-photo{height:240px;margin-bottom:18px}.explain h2{font-size:21px}.family-service{padding:18px 0}.learning-resources,.family-services{padding:22px 0}.catalog{padding:20px 0}.a8-ad{padding:18px 0}}
@media(max-width:359px){.home-page main>*{width:calc(100% - 28px)}.hero-copy{width:calc(100% - 28px)}.hero-copy h1{font-size:25px}.grade-entry,.grade-entry:visited{padding:12px 8px}}
/* Lists show the landscape; units keep the smaller contextual photograph. */
.material-library:not(.unit-page):not(.home-page) .library-photo-strip img{height:200px;object-position:50% 60%}.book{border:0;border-top:1px solid var(--line);border-radius:0;background:transparent;padding:22px 0}.book h3{font-size:18px;line-height:1.7}.books-grid{column-gap:30px}.family-service{border-top:1px solid var(--line)!important}
@media(max-width:800px){.material-library:not(.unit-page):not(.home-page) .library-photo-strip img{height:160px}.books-grid{column-gap:24px}}
@media(max-width:560px){.material-library:not(.unit-page):not(.home-page) .library-photo-strip img{height:120px}.book{padding:20px 0}}
/* On phones, the six grade entrances stay in the first screen with both QR codes. */
@media(max-width:560px){.site-header{padding-top:10px;padding-bottom:10px}.site-header .brand span{display:none}.site-header nav{margin-top:2px}.site-header .social-links{margin-top:4px}.site-header .social-qr{padding:0;width:128px;gap:2px}.site-header .social-description{display:none}.site-header .social-label{font-size:11px;line-height:1.5}.hero-photo{height:180px}.home-page main>.hero{margin-top:10px;margin-bottom:16px}.hero-copy{padding-top:12px}.hero-copy h1{font-size:26px;line-height:1.45;margin-bottom:0}.grade-first h2{margin-bottom:8px}.grade-entry,.grade-entry:visited{padding-top:12px;padding-bottom:12px;min-height:78px}.home-page main>.grade-first{margin-bottom:22px}}
/* Align every structural section to the same page edge, including ad asides. */
.home-page main>.grade-first{margin-left:auto;margin-right:auto}.a8-ad{width:calc(100% - 80px);max-width:1140px;margin:20px auto;padding:24px 0}
@media(max-width:1100px){.a8-ad{width:calc(100% - 56px)}}
@media(max-width:800px){.a8-ad{width:calc(100% - 48px)}}
@media(max-width:560px){.a8-ad{width:calc(100% - 40px);padding:20px 0}}
@media(max-width:359px){.a8-ad{width:calc(100% - 28px)}}
/* Only the home hero changes photographs. Both images share a fixed footprint. */
.night-hero .night-layer{position:relative;opacity:1;transition:opacity 2.2s ease-in-out;pointer-events:none}.night-hero .night-layer-next{position:absolute;inset:0;opacity:0}.night-hero .hero-copy,.night-hero .hero-photo-caption,.night-toggle{z-index:2}.night-toggle{position:absolute;right:18px;top:374px;display:block;min-height:44px;padding:8px 14px;border:1px solid #ffffffb3;border-radius:4px;background:#182c3ac9;color:#fff;font:700 12px var(--sans);cursor:pointer}.night-toggle:hover{background:#182c3ae8}.night-toggle:focus-visible{outline:3px solid #fff;outline-offset:3px}.explain{display:block}.explain h2{margin-top:0}.photo-credit>span{display:block;margin-top:3px}
@media(max-width:800px){.night-toggle{top:284px}}
@media(max-width:560px){.night-toggle{top:126px;right:12px;font-size:11px;padding:8px 11px}.night-hero .hero-copy{position:static}}
@media(prefers-reduced-motion:reduce){.night-hero .night-layer{transition:none}}
.night-toggle[hidden]{display:none!important}

.night-hero{background:#172e43}.night-hero .night-layer{z-index:0}.night-hero .night-layer-next{z-index:1}.night-unavailable .night-layer{visibility:hidden}.night-unavailable .hero-photo-caption{color:#fff;background:#172e43}.night-unavailable .night-toggle{display:none!important}
@media(max-width:560px){.night-unavailable .hero-copy{background:var(--canvas)}}

/* Keep both layers positioned so the front layer alternates without hard cuts. */
.night-hero::after{content:"";position:absolute;inset:0;z-index:2;pointer-events:none;background:linear-gradient(90deg,#102333b8 0%,#10233360 43%,transparent 75%)}.night-hero .hero-copy,.night-hero .hero-photo-caption,.night-toggle{z-index:3}
@media(max-width:560px){.night-hero::after{display:none}}
/* Home link to the existing education guide directory. */
.home-education-guides{max-width:490px;margin:12px 0 0;padding:12px 14px;border:1px solid #ffffff80;border-radius:8px;background:#122a3ddd;color:#fff;text-shadow:none}
.home-education-guides h2{margin:0 0 4px;color:#fff;font-size:14px;line-height:1.45}
.home-education-guides p{margin:0 0 8px;color:#fff;font-size:12px;line-height:1.6}
.home-education-guides a,.home-education-guides a:visited{display:inline-flex;align-items:center;min-height:40px;padding:6px 12px;border-radius:5px;background:#fff;color:#183d50;font-size:13px;font-weight:700;text-decoration:underline;text-underline-offset:3px}
.home-education-guides a:focus-visible{outline:3px solid #f4cc66;outline-offset:3px}

/* Four clear entrances; existing lesson-plan grade selection remains intact. */
.site-header .site-brand-nav{min-width:0;flex:1}
.site-header nav.primary-entries{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;width:100%;margin:22px 0 0;padding:0;border:0;align-items:stretch}
.site-header nav.primary-entries a{display:flex;flex-direction:column;justify-content:center;gap:5px;min-width:0;min-height:76px;padding:13px 15px;border:1px solid #cad5d6;border-radius:6px;background:#f5f8f7;color:#243a42;text-decoration:none;box-sizing:border-box;line-height:1.45}
.site-header nav.primary-entries a::after{display:none}
.site-header nav.primary-entries a[aria-current="page"]{border-color:#176679;background:#176679;color:#fff}
.site-header nav.primary-entries a:hover{border-color:#176679;background:#e7f0ef;color:#153d48}
.site-header nav.primary-entries a:focus-visible,.worksheet-activity-links a:focus-visible{outline:3px solid #bd5b43;outline-offset:3px}
.entry-label{font-weight:700;font-size:17px;white-space:nowrap}
.entry-description{font-size:11px;line-height:1.5;white-space:normal;color:inherit;opacity:.9}
.worksheet-activity-index{padding:24px 0 28px;border-top:1px solid #cad5d6;margin-top:24px}
.worksheet-activity-index h2{margin:0 0 18px}
.worksheet-activity-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.worksheet-activity-links a{display:grid;grid-template-columns:1fr auto;gap:9px;padding:24px;border:1px solid #bdd0d3;border-left:5px solid #176679;background:#fff;text-decoration:none;color:#243a42}
.worksheet-activity-links strong{grid-column:1;font-size:24px}
.worksheet-activity-links a span:first-of-type{grid-column:1;font-size:14px;line-height:1.65}
.worksheet-activity-links a span:last-of-type{grid-column:2;grid-row:1 / 3;align-self:center;font-size:25px;color:#176679}
#education-services{scroll-margin-top:24px}
@media(max-width:760px){
 .site-header nav.primary-entries{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-top:20px}
 .site-header nav.primary-entries a{padding:12px 13px;min-height:73px}
 .entry-label{font-size:17px}
 .entry-description{font-size:11px}
 .worksheet-activity-links{grid-template-columns:1fr;gap:12px}
 .worksheet-activity-links a{padding:20px}
}

.site-header-inner{display:grid;grid-template-columns:1fr;gap:18px}
.site-header .primary-entries{max-width:900px}
.social-links{display:grid;grid-template-columns:repeat(3,136px);gap:16px;max-width:440px;width:100%}
.social-reserved{display:block;min-width:0}
.social-qr{width:136px;min-width:0}.social-label{max-width:136px;overflow-wrap:anywhere}
.site-header .social-description{display:block;font-size:10px}
.site-header .social-label{font-size:12px;line-height:1.5}
.affiliate-disclosure{margin:8px auto!important;padding:0!important;font-size:11px!important;color:#536368}
.night-toggle{display:none!important}
.night-hero::after{background:linear-gradient(90deg,#10233375 0%,#10233328 43%,transparent 75%)}
@media(max-width:800px){.site-footer-inner{display:block}.social-links{grid-template-columns:repeat(2,128px);gap:14px 16px;max-width:272px}.social-qr{width:128px;padding:0}.site-header .social-label{font-size:11px}.site-header .social-description{display:none}.site-header-inner{gap:12px}.site-header nav.primary-entries{margin-top:14px}.night-hero::after{display:none}.affiliate-disclosure{font-size:10px!important}}

.social-label{word-break:keep-all;overflow-wrap:normal}

/* Keep each mobile QR readable; narrow screens wrap the third destination. */
@media(max-width:800px){.social-links>.social-qr:last-child{grid-column:1/-1;justify-self:center}.site-footer .social-links{margin-top:20px}.social-label{max-width:128px;line-height:1.5}.social-qr img{width:128px;height:128px}}
@media(min-width:460px) and (max-width:800px){.social-links{grid-template-columns:repeat(3,128px);max-width:404px;gap:10px}.social-links>.social-qr:last-child{grid-column:auto;justify-self:auto}}
/* QUIET_READABLE_AD_DISCLOSURE */
.affiliate-disclosure{color:inherit!important;font-size:13px!important;font-weight:400!important;background:transparent!important;border:0!important;padding:0!important;margin:8px auto!important;line-height:1.5!important}.affiliate-disclosure:before,.affiliate-disclosure:after{content:none!important}
/* QUIET_READABLE_AD_DISCLOSURE_END */

/* Desktop only: keep the four entrances next to the QR destinations. */
@media(min-width:1000px){
 .site-header{padding:20px 32px}
 .site-header .site-header-inner{display:grid;grid-template-columns:minmax(0,1fr) 432px;gap:28px;align-items:center;max-width:1140px;margin:0 auto}
 .site-header .site-brand-nav{min-width:0}
 .site-header .brand{font-size:28px;line-height:1.4}
 .site-header .brand span{font-size:12px;line-height:1.5;margin-top:5px}
 .site-header nav.primary-entries{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;max-width:none;width:100%;margin:16px 0 0}
 .site-header nav.primary-entries a{padding:10px 8px;min-height:72px;gap:4px;align-items:center;text-align:center}
 .site-header .entry-label{font-size:15px;line-height:1.45;white-space:nowrap}
 .site-header .entry-description{font-size:10px;line-height:1.6}
 .site-header .social-links{display:grid;grid-template-columns:repeat(3,136px);gap:12px;width:432px;max-width:none;margin:0;align-items:start}
 .site-header .social-qr{width:136px;padding:4px;gap:3px;margin:0}
 .site-header .social-qr img{display:block;width:128px;height:128px;max-width:none}
 .site-header .social-label{font-size:11px;line-height:1.55;max-width:136px;word-break:keep-all;overflow-wrap:normal}
 .site-header .social-description{display:block;font-size:9px;line-height:1.6;margin-top:1px}
 .site-header .social-reserved{display:block;width:136px;min-width:136px;min-height:128px}
}

.family-services{margin-bottom:0;padding-bottom:12px}
.family-services .books-grid{align-items:start}
.family-service{padding-bottom:0}
.family-service .service-label{font-size:12px;color:var(--muted);margin:0 0 8px}
.family-service .service-benefit{margin-bottom:16px}
.service-offer{font-weight:700;color:var(--accent);font-size:16px;margin:0 0 8px}
.family-service .service-offer{font-size:16px}
.service-terms,.family-service .service-terms{font-size:12px;line-height:1.8;color:var(--muted);margin:0 0 18px}
.family-service .a8-creative{line-height:0;overflow:visible}
.family-service .a8-creative>a{display:block;width:300px;max-width:100%;line-height:0}
.family-service .a8-creative>a img{display:block;width:300px;max-width:100%;height:auto}
.family-service .a8-creative>img[width="1"][height="1"]{position:absolute;width:1px;height:1px;max-width:1px}
main>.a8-ad{margin-top:20px;margin-bottom:0;padding-top:20px;padding-bottom:0;width:100%;max-width:none}
main>.a8-ad h2{font-size:24px;margin:0 0 16px}
main>.a8-ad>p:not(.service-offer):not(.service-terms){max-width:760px;font-size:15px}
@media(max-width:560px){
 .family-service .a8-creative>a,.family-service .a8-creative>a img{width:200px}
 main>.a8-ad h2{font-size:22px}
}

.site-header.compact-header{padding:14px 24px;background:#fff}
.site-header.compact-header .site-header-inner{display:block;max-width:1140px;margin:0 auto}
.site-header.compact-header .compact-image-brand{display:flex;align-items:center;justify-content:center;width:100%;margin:0;padding:0;line-height:0}
.site-header.compact-header .compact-image-brand picture{display:block;width:320px;max-width:100%}
.site-header.compact-header .compact-image-brand img{display:block;width:320px;max-width:100%;height:auto;margin:0;object-fit:contain}
.site-header.compact-header--detail .site-header-inner{display:flex;justify-content:center;align-items:center}
.site-header.compact-header--home .compact-home-actions{display:grid;grid-template-columns:minmax(0,1fr) 432px;gap:28px;align-items:center;margin-top:14px}
.site-header.compact-header--home nav.primary-entries{margin:0;max-width:none}
.footer-primary-entries{display:flex;flex-wrap:wrap;justify-content:center;gap:8px 24px;max-width:1140px;margin:24px auto 0;padding:16px 0 0;border-top:1px solid #dde5e8}
.footer-primary-entries a{display:block;padding:6px 0;font-size:13px;line-height:1.6;white-space:nowrap}
@media(max-width:999px){.site-header.compact-header--home .compact-home-actions{display:block}.site-header.compact-header--home nav.primary-entries{margin:0 0 18px}.site-header.compact-header--home .social-links{margin-left:auto;margin-right:auto}}
@media(max-width:800px){.site-header.compact-header .compact-image-brand picture{width:280px;max-width:100%}.site-header.compact-header{padding:12px 20px}.site-header.compact-header .compact-image-brand img{width:280px;max-width:100%;height:auto}.site-header.compact-header--home .compact-home-actions{margin-top:14px}.footer-primary-entries{gap:6px 20px;margin-top:22px;padding-top:12px}}


.activities-main{max-width:1200px;margin:0 auto;padding:36px 24px 64px;color:#243744}.activities-main h1{font-size:clamp(1.8rem,4vw,2.8rem);line-height:1.45;margin:12px 0}.activities-main h2{font-size:1.35rem;line-height:1.6}.activity-lead{font-size:1.1rem;line-height:1.9;max-width:44em}.activity-filters{display:flex;flex-wrap:wrap;gap:10px;margin:28px 0 14px}.activity-filters a{display:inline-block;padding:10px 16px;border:1px solid #b4c8cc;border-radius:999px;text-decoration:none;background:white;color:#285b65}.activity-filters a[aria-current=true]{background:#196579;color:white;border-color:#196579}.activities-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px;margin:20px 0 40px}.activity-card{display:flex;flex-direction:column;text-decoration:none!important;border:1px solid #d5dfdd;border-radius:12px;padding:12px;background:white;overflow:hidden;transition:box-shadow .18s}.activity-card:hover{box-shadow:0 5px 18px #213e421a}.activity-card img{display:block;width:100%;height:auto;object-fit:contain;background:#fff}.activity-card h2{font-size:1rem;margin:6px 0 12px;color:#243744}.activity-category{font-size:.8rem;color:#647875;margin-top:12px}.activity-open{font-size:.85rem;color:#226576;margin-top:auto}.activity-card[hidden]{display:none}.activity-notice,.activity-guidance{background:#f1f5ef;border:1px solid #d3ded0;padding:20px 24px;border-radius:12px;margin:32px 0;font-size:.95rem;line-height:1.9}.activity-notice h2,.activity-guidance h2{margin-top:0}.activities-downloads{display:flex;flex-wrap:wrap;gap:12px;margin:16px 0 28px}.activities-downloads a,.download-child,.activities-main button{display:inline-block;padding:12px 18px;border:1px solid #b4c8cc;border-radius:7px;background:white;color:#1f5867;text-decoration:none;font:inherit;cursor:pointer}.activities-downloads .download-child,.download-child{background:#196579;color:white;border-color:#196579;font-weight:700}.activity-bundles>div{padding:16px 0;border-bottom:1px solid #d8dfdb}.activity-detail-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:36px;align-items:start;margin-top:26px}.activity-sheet{padding:16px;background:#eef2ee;border-radius:12px}.activity-preview{display:block;width:100%;height:auto;object-fit:contain;box-shadow:0 2px 12px #24374415}.activity-zoom{margin:16px 0}.activity-single{display:block;text-align:center}.activity-howto{line-height:1.9}.activity-howto section{margin-bottom:24px}.activity-howto h2{margin:0 0 8px}.activity-howto p{margin:8px 0}.activity-answer{padding:14px 18px;background:#fff;border:1px solid #cedbd7;border-radius:8px}.activity-answer summary{cursor:pointer;font-weight:700}#activity-image-dialog{padding:56px 12px 12px;width:min(96vw,1300px);max-height:96vh;border:0;border-radius:12px;background:#f0f3ef;overflow:auto}#activity-image-dialog::backdrop{background:#14252bd4}#activity-image-dialog img{width:100%;height:auto;display:block}.activity-close{position:sticky;top:0;float:right;margin-top:-48px;z-index:2}.activities-entry{display:flex;flex-direction:column;gap:8px;max-width:1200px;margin:24px auto 32px;padding:22px 26px;background:#eef5ee;border:1px solid #b8cebe;border-left:5px solid #387747;border-radius:10px;color:#28533b;text-decoration:none!important}.activities-entry strong{font-size:clamp(1.25rem,2vw,1.65rem);line-height:1.6}.activities-entry span{line-height:1.8;font-size:.95rem}.activities-main a:focus-visible,.activities-main button:focus-visible{outline:3px solid #8c539f;outline-offset:3px}@media(max-width:900px){.activities-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}}@media(max-width:600px){.activities-main{padding:24px 16px 48px}.activities-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.activity-card{padding:9px}.activity-detail-layout{grid-template-columns:1fr;gap:24px}.activity-filters{gap:8px}.activity-filters a{padding:8px 12px;font-size:.9rem}.activity-notice,.activity-guidance{padding:16px}.activities-entry{margin:20px 0 24px;padding:18px}.activities-downloads{flex-direction:column}.activities-downloads a{text-align:center}.activity-howto h2{font-size:1.2rem}}@media(prefers-reduced-motion:reduce){.activity-card{transition:none}}

.activity-disclosure{font-size:.85rem;color:#566761;line-height:1.85;max-width:64em;margin:12px 0 22px}.activity-disclosure a{white-space:nowrap}#use-before{scroll-margin-top:20px}

#activity-image-dialog img{max-width:none}.activity-scale{position:sticky;top:0;margin-top:-48px;margin-bottom:12px;float:left;z-index:2}

/* One grid for navigation; equal image, title and description rows. */
.site-header.compact-header--home .compact-home-actions{grid-template-columns:minmax(0,1fr) 504px;align-items:stretch;gap:32px}
.site-header.compact-header--home .site-brand-nav{display:flex;align-items:stretch}
.site-header.compact-header--home nav.primary-entries{grid-template-columns:repeat(3,minmax(0,1fr));grid-auto-rows:1fr;height:100%;gap:10px}
.site-header.compact-header--home nav.primary-entries a{min-height:80px;padding:14px 10px;justify-content:center}
.site-header.compact-header--home .entry-label{font-size:16px;line-height:24px}
.site-header.compact-header--home .entry-description{font-size:11px;line-height:18px}
.site-header .social-links,.site-footer .social-links{display:grid;grid-template-columns:repeat(3,160px);gap:12px;width:504px;max-width:100%;align-items:stretch;margin:0}
.site-header .social-qr,.site-footer .social-qr{display:grid;grid-template-rows:160px auto;justify-items:center;width:160px;box-sizing:border-box;padding:4px;gap:12px;align-content:start}
.site-header .social-qr img,.site-footer .social-qr img{width:128px;height:128px;object-fit:contain;max-width:none;margin:0}
.site-header .social-label,.site-footer .social-label{display:grid;grid-template-rows:36px 16px;gap:4px;width:160px;max-width:none;font-size:11px;line-height:18px}
.site-header .social-title,.site-footer .social-title{display:block;font-size:11px;line-height:18px;white-space:nowrap}
.site-header .social-description,.site-footer .social-description{display:block;font-size:9px;line-height:16px;margin:0;white-space:nowrap}
.family-services .books-grid{grid-template-columns:repeat(2,minmax(0,1fr));align-items:stretch;column-gap:32px;row-gap:0}
.family-services .family-service{display:grid;grid-template-rows:subgrid;grid-row:span 6;gap:0;align-content:start;padding-bottom:24px}
.family-service .a8-creative{grid-row:6;align-self:start}
.family-service noscript{display:none}
main>.a8-ad{box-sizing:border-box;width:calc(100% - 80px);max-width:1140px;margin:24px auto 0;padding:24px 0;border-top:1px solid #cad5d6}
@media(max-width:999px){
 .site-header.compact-header--home .compact-home-actions{display:grid;grid-template-columns:1fr;gap:24px}
 .site-header.compact-header--home nav.primary-entries{margin:0;grid-template-columns:repeat(3,minmax(0,1fr))}
 .site-header.compact-header--home .social-links,.site-footer .social-links{margin:0 auto}
}
@media(max-width:600px){
 .site-header.compact-header--home nav.primary-entries{grid-template-columns:repeat(2,minmax(0,1fr));height:auto}
 .site-header .social-links,.site-footer .social-links{grid-template-columns:1fr;width:100%;gap:12px}
 .site-header .social-qr,.site-footer .social-qr{grid-column:auto!important;justify-self:stretch!important;width:100%;grid-template-columns:160px 1fr;grid-template-rows:160px;align-items:center;align-content:center;justify-items:start;gap:20px;padding:0}
 .site-header .social-label,.site-footer .social-label{width:auto;text-align:left;grid-template-rows:40px 18px;font-size:13px;line-height:20px}
 .site-header .social-title,.site-footer .social-title{font-size:13px;line-height:20px}
 .site-header .social-description,.site-footer .social-description{font-size:10px;line-height:18px}
 .family-services .books-grid{grid-template-columns:1fr;row-gap:24px}
 .family-services .family-service{display:block;grid-row:auto}
 .family-service noscript{display:none}
 main>.a8-ad{width:calc(100% - 40px)}
}

.social-qr .qr-image-frame{display:flex;align-items:center;justify-content:center;width:160px;height:160px;background:#fff}
.site-header .social-qr img[src*="threads-qr"],.site-footer .social-qr img[src*="threads-qr"]{width:158.3448px;height:158.3448px}
.site-header .social-qr img[src*="request-qr"],.site-footer .social-qr img[src*="request-qr"]{width:152.7273px;height:152.7273px}
.site-header .social-qr img[src*="openchat-qr"],.site-footer .social-qr img[src*="openchat-qr"]{width:131.9111px;height:131.9111px}
/* On phones, destinations stay tappable; readable QR codes stay in the footer. */
@media(max-width:600px){
 .site-header.compact-header--home .social-links{grid-template-columns:repeat(3,minmax(0,1fr));gap:6px}
 .site-header.compact-header--home .social-qr{display:flex;align-items:center;justify-content:center;min-height:64px;padding:8px 2px;border:1px solid #dde5e8;border-radius:6px;background:#fff;gap:0;text-align:center}
 .site-header.compact-header--home .qr-image-frame{display:none}
 .site-header.compact-header--home .social-label{display:block;width:100%;text-align:center}
 .site-header.compact-header--home .social-title{font-size:clamp(9px,2.7vw,11px);line-height:18px}
 .site-header.compact-header--home .social-description{display:none}
}
@media(min-width:601px){
 .family-service .service-label{grid-row:1}
 .family-service h3{grid-row:2}
 .family-service .service-benefit{grid-row:3}
 .family-service .service-offer{grid-row:4}
 .family-service .service-terms{grid-row:5}
 .family-service noscript{display:none}
}

/* Fixed card and artwork frames: repeat two columns without a separate audio strip. */
.family-services .books-grid{gap:24px;align-items:stretch}
.family-services .family-service{border:1px solid #d8e2e3;border-radius:12px;background:#fff;padding:24px;box-sizing:border-box;min-width:0;grid-row:span 6;row-gap:0}
.family-service h3{font-size:22px;line-height:1.5;margin:4px 0 16px}
.family-service .a8-creative{display:flex;justify-content:center;align-items:center;width:100%;height:250px;margin:0;line-height:0}
.family-service .a8-creative>a,.family-service .a8-creative>a img{width:300px;max-width:100%;height:auto}
@media(max-width:600px){.family-services .family-service{display:flex;flex-direction:column;padding:20px}.family-service .a8-creative{margin-top:auto;height:250px}.family-service h3{font-size:21px}}
@media(min-width:1000px){.family-services .family-service{min-height:580px}}
@media(min-width:601px) and (max-width:999px){.family-services .family-service{min-height:700px}}
@media(min-width:601px){
 .family-services .books-grid{grid-auto-rows:1fr}
 .family-services .family-service{grid-row:auto;grid-template-rows:24px 66px minmax(80px,1fr) 52px 76px 250px;min-height:600px}
 .family-service .a8-creative{align-self:end}
}
@media(min-width:601px) and (max-width:999px){.family-services .family-service{grid-template-rows:24px 99px minmax(120px,1fr) 78px 104px 250px;min-height:725px}}

/* LEGAL_BADGE_CSS_START */.legal-insurance{display:flex;align-items:center;gap:16px;margin-top:24px;max-width:430px}.legal-insurance img{display:block;width:64px;height:64px;flex:none;object-fit:contain}.legal-insurance p{margin:0;font-size:13px;line-height:1.9;color:#526570}.operator-insurance{display:flex;align-items:center;gap:24px;max-width:640px;margin:24px 0 40px}.operator-insurance img{width:96px;height:96px;object-fit:contain;flex:none}.operator-insurance p{margin:0;line-height:1.9}@media(max-width:600px){.operator-insurance{gap:18px}.operator-insurance img{width:72px;height:72px}}/* LEGAL_BADGE_CSS_END */.audience-paths{max-width:1180px;margin:20px auto;padding:0 18px;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.audience-paths a{display:flex;flex-direction:column;gap:4px;min-height:96px;padding:16px 18px;border:2px solid #9ac2ae;border-radius:14px;background:#f7fbf7;color:#173d30;text-decoration:none}.audience-paths strong{font-size:1.14rem}.audience-paths span{font-size:.94rem;line-height:1.5}.audience-paths a:hover{background:#e9f4ec}.audience-paths a:focus-visible{outline:3px solid #a64b18;outline-offset:3px}@media(max-width:700px){.audience-paths{grid-template-columns:1fr;margin:12px auto}.audience-paths a{min-height:0}}
.ai-guide{max-width:860px;margin:36px auto 56px}.ai-guide h1{font-size:clamp(26px,4vw,36px);line-height:1.55;margin-bottom:18px}.ai-guide .lead{font-size:17px;line-height:1.9}.ai-guide section{border:0;border-top:1px solid var(--line,#dde3e5);border-radius:0;background:transparent;padding:32px 0 0;margin:32px 0}.ai-guide h2{font-size:23px}.ai-guide h3{font-size:17px;margin:24px 0 10px}.ai-guide blockquote{margin:12px 0 24px;padding:18px 22px;border-left:3px solid var(--accent,#286b83);background:var(--accent-soft,#edf5f7);font-size:15px;line-height:1.9}.ai-guide .choices{display:flex;flex-wrap:wrap;gap:8px 20px;padding:18px 0;margin:20px 0;font-size:14px}.ai-guide .choices a{min-height:40px;display:inline-flex;align-items:center;text-decoration:underline}.ai-guide .updated{color:var(--muted,#5d6b75);font-size:13px}.ai-guide ul{padding-left:1.3em}.ai-guide li{margin:8px 0}.review-discovery{margin:36px 0;padding:24px 0;border-top:1px solid var(--line,#dde3e5)}.review-discovery h2{font-size:20px;margin-bottom:12px}.review-discovery ul{display:flex;flex-wrap:wrap;gap:10px 24px;list-style:none;padding:0;margin:0}.review-discovery a{font-size:14px;line-height:1.8}@media(max-width:600px){.ai-guide{margin-top:24px}.ai-guide h2{font-size:21px}.ai-guide blockquote{padding:14px 16px}.ai-guide .choices{gap:6px 18px}.review-discovery ul{display:block}.review-discovery li{margin:10px 0}}
.family-services .books-grid{grid-auto-rows:auto}
.family-services .family-service--text{display:flex;flex-direction:column;grid-template-rows:none;grid-row:auto;min-height:0}
.family-service--text .service-benefit{margin:0 0 14px}
.family-service--text .service-terms{margin:0 0 14px}
.family-service--text .a8-creative{display:block;height:auto;min-height:0;line-height:1.8;margin-top:4px}
.family-service--text .a8-creative>a{display:inline;width:auto;max-width:100%;line-height:1.8}

/* Keep the 300px affiliate creative inside its card at desktop zoom and narrow windows. */
@media (max-width: 800px) {
  .home-page .family-services > .books-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* Contextual affiliate section: visually separate from free learning content and controls. */
.contextual-pr{box-sizing:border-box;clear:both;position:relative;isolation:isolate;margin:2rem auto 1.5rem;padding:1rem;max-width:72rem;border:1px solid #d8e1ec;border-radius:1rem;background:#f7f9fc;color:#243247;font:inherit;line-height:1.55}
.contextual-pr *{box-sizing:border-box}
.contextual-pr__eyebrow{display:inline-block;margin:0 0 .45rem;padding:.12rem .5rem;border-radius:999px;background:#fff0d4;color:#704800;font-size:.78rem;font-weight:700}
.contextual-pr__heading{margin:.1rem 0 .35rem;font-size:1.15rem;line-height:1.4}
.contextual-pr__intro,.contextual-pr__disclosure{margin:.3rem 0 .7rem;font-size:.9rem}
.contextual-pr__cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,15rem),1fr));gap:.7rem;margin-top:.65rem}
.contextual-pr__card{min-width:0;padding:.85rem;border:1px solid #dce4ed;border-radius:.75rem;background:#fff}
.contextual-pr__card h3{margin:0 0 .35rem;font-size:1rem;line-height:1.45}
.contextual-pr__card p{margin:.35rem 0;font-size:.9rem}
.contextual-pr__card a{display:inline-block;margin-top:.25rem;padding:.45rem .7rem;border-radius:.5rem;background:#164e73;color:#fff;font-weight:700;text-decoration:none}
.contextual-pr__card a:hover,.contextual-pr__card a:focus-visible{text-decoration:underline;outline:2px solid #164e73;outline-offset:2px}
.contextual-pr__terms{color:#46566b;font-size:.82rem!important}
.contextual-pr__disclosure{margin-top:.8rem;color:#46566b;font-size:.78rem}
/* Keep the block below fixed/canvas game surfaces, never over controls. */
[data-contextual-pr]{scroll-margin-top:1rem}
@media(max-width:38rem){.contextual-pr{margin:1.25rem .5rem;padding:.8rem;border-radius:.75rem}.contextual-pr__cards{grid-template-columns:1fr}.contextual-pr__card a{min-height:2.75rem;display:flex;align-items:center;justify-content:center}}
/* Some fixed games set html/body overflow:hidden. Preserve app dimensions and restore page flow for the footer below it. */
html.contextual-pr-page{height:auto!important;min-height:100%;overflow-x:hidden!important;overflow-y:auto!important}
html.contextual-pr-page body.contextual-pr-page{height:auto!important;min-height:100%;overflow-x:hidden!important;overflow-y:visible!important}
.contextual-pr{grid-column:1/-1}
.contextual-pr__creative{max-width:100%;overflow-wrap:anywhere}.contextual-pr__creative img{max-width:100%;height:auto}
/* r12-a8-text */.contextual-pr__card.family-service .a8-creative{display:block;height:auto;line-height:1.6;width:auto}.contextual-pr__card.family-service .a8-creative>a:not(:has(img)){display:inline;width:auto;line-height:1.6}

/* 関連PRカード・親子の本の表紙と楽天リンク（楽天ブックスの画像） 2026-10-21 */
.contextual-pr__card a.pr-cover{display:block;width:max-content;max-width:100%;min-height:0;margin:0 0 .55rem;padding:0;background:none;border-radius:0;line-height:0;text-decoration:none}
.contextual-pr__card a.pr-cover img{display:block;height:120px;width:auto;max-width:100%;border:1px solid #dce4ed;background:#fff}
.contextual-pr__card a.pr-rakuten{margin-left:.35rem}
@media(max-width:38rem){.contextual-pr__card a.pr-cover{display:block;min-height:0}.contextual-pr__card a.pr-rakuten{margin-left:0;margin-top:.45rem}}
.family-book .family-cover{display:inline-block;margin:0 0 12px;line-height:0;text-decoration:none}
.family-book .family-cover img{display:block;height:150px;width:auto;max-width:100%;border:1px solid #d9dfd2;background:#fff}
.contextual-pr__card a.pr-cover[hidden],.family-book .family-cover[hidden]{display:none}

/* HOME_SEO_CSS: トップページの指導案案内（早見表・よくある質問）専用 */
.home-seo ul{margin:10px 0 14px;padding-left:1.4em;max-width:880px;font-size:15px;line-height:1.9}
.home-seo .seo-table-wrap{max-width:880px;margin:14px 0;overflow-x:auto}
.home-seo table{width:100%;border-collapse:collapse;font-size:15px;line-height:1.6;background:#fff}
.home-seo caption{caption-side:top;text-align:left;padding-bottom:6px;font-size:13px;color:var(--muted,#5d6b75)}
.home-seo th,.home-seo td{border:1px solid var(--line,#dde3e5);padding:4px 6px;text-align:center;vertical-align:middle}
.home-seo thead th,.home-seo tfoot th,.home-seo tfoot td{background:var(--soft,#f4f6f6);font-weight:600}
.home-seo tbody th{text-align:left;white-space:nowrap;font-weight:600}
.home-seo td a,.home-seo th a{display:block;padding:5px 6px;color:var(--accent,#286b83);text-underline-offset:4px}
.home-seo td.none{color:var(--muted,#5d6b75)}
.home-seo h3{margin:22px 0 6px;font-family:var(--sans,sans-serif);font-size:16px;line-height:1.6}
.home-seo .faq-list p{margin-top:0}
@media(max-width:560px){.home-seo table{font-size:13px}.home-seo th,.home-seo td{padding:2px 2px}.home-seo td a,.home-seo th a{padding:6px 3px}}