/* 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}}