@import url('https://fonts.googleapis.com/css2?family=Barlow+Condensed:wght@600;700;800;900&family=Montserrat:wght@400;500;600;700;800&display=swap');
:root{--navy:#06142e;--deep:#030b1d;--blue:#0e70ba;--cyan:#20b5ff;--yellow:#ffd326;--ink:#142b49;--muted:#667b92;--paper:#f2f5fa}*{box-sizing:border-box}body{margin:0;font-family:Montserrat,Arial,sans-serif;color:var(--ink)}button,input{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #20b5ff;outline-offset:4px}button:disabled{opacity:.4;cursor:default}button{border:0}img{max-width:100%}.eyebrow{font-size:10px;letter-spacing:2px;font-weight:800;color:var(--blue)}.primary,.secondary{padding:15px 22px;font-size:11px;font-weight:800;border-radius:5px;letter-spacing:.5px}.primary{background:var(--yellow);color:var(--navy)}.secondary{background:white;color:var(--ink);border:1px solid #d5dfeb}.quiet{background:transparent;color:inherit;font-size:11px;font-weight:700;padding:10px;border:1px solid #d7e1ed;border-radius:4px}.quiet[aria-pressed=true]{background:#fff0af;color:#453500}.login-body{background:radial-gradient(ellipse at 15% 30%,#0c4b88,#06142e 65%);color:white;min-height:100vh}.back-home{position:absolute;top:28px;left:5%;font-size:12px;color:#b8cee8}.login-layout{max-width:1080px;margin:auto;min-height:100vh;display:grid;grid-template-columns:1.2fr 1fr;gap:65px;align-items:center;padding:90px 25px 45px}.login-brand{position:relative;min-height:590px}.login-brand>img:first-child{width:180px;display:block;margin-bottom:35px}.login-brand .eyebrow{color:var(--cyan)}.login-brand h1{font:900 74px/.95 'Barlow Condensed',Impact,sans-serif;position:relative;z-index:1;margin:18px 0}.login-brand em{color:var(--yellow);font-style:normal}.login-brand p{font-size:12px;color:#bdd3eb;position:relative;z-index:2;max-width:250px;line-height:1.8}.login-mascot{position:absolute;width:240px;height:310px;object-fit:contain;bottom:-15px;right:-10px}.login-card{background:white;color:var(--ink);padding:42px;border-radius:14px;box-shadow:0 30px 90px #0003}.login-card h2{font:800 46px/1 'Barlow Condensed',Impact,sans-serif;margin:18px 0}.login-card p{font-size:12px;line-height:1.8;color:var(--muted)}.login-card label{font-size:11px;font-weight:800;display:block;margin:22px 0}.login-card input,.book-sidebar input{width:100%;border:1px solid #ced9e7;background:#f7f9fc;border-radius:5px;padding:14px;font-size:16px;margin-top:9px;color:var(--ink)}.login-card .primary{width:100%}.login-card small{display:block;font-size:10px;line-height:1.8;color:var(--muted);margin-top:25px}.password-wrap{display:flex;align-items:center;position:relative}.password-wrap input{padding-right:70px}.password-wrap button{position:absolute;right:10px;top:21px;background:transparent;color:var(--blue);font-size:11px;font-weight:bold}.login-card .error{color:#ab1935}.book-body{background:var(--paper)}.book-header{height:88px;position:sticky;top:0;z-index:20;background:var(--navy);color:white;padding:12px 30px;display:flex;align-items:center;gap:24px;border-bottom:1px solid #20385a}.book-header img{width:132px;display:block}.book-header>div{border-left:1px solid #314762;padding-left:24px;flex:1}.book-header small{display:block;font-size:9px;color:var(--cyan);letter-spacing:2px;margin-bottom:6px}.book-header strong{font-size:13px}.book-header .quiet{border-color:#3a506b}.book-layout{max-width:1600px;margin:auto;display:grid;grid-template-columns:280px 1fr}.book-sidebar{padding:36px 24px;position:sticky;top:88px;height:calc(100vh - 88px);overflow-y:auto;background:white;border-right:1px solid #dce5ef}.book-sidebar>label{font-size:9px;font-weight:800;letter-spacing:1px}.book-sidebar input{font-size:12px;padding:13px}.book-sidebar nav{margin:28px 0;display:grid;gap:8px}.chapter-button{display:flex;text-align:left;align-items:center;gap:12px;padding:14px 10px;background:transparent;color:#5b7089;border-radius:6px;font-size:11px;font-weight:700}.chapter-button span{font:800 25px 'Barlow Condensed';color:#9eafc2}.chapter-button[aria-current=true]{background:#eaf3fc;color:var(--blue)}.chapter-button[aria-current=true] span{color:var(--blue)}.sidebar-note{border-top:1px solid #e1e7ef;padding-top:20px;font-size:11px;line-height:1.8;color:var(--muted)}.sidebar-note>span{font-size:32px}.sidebar-note p{margin:5px 0}#book-main{padding:42px clamp(24px,4vw,65px);min-width:0}.book-heading{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:30px}.book-heading h1{font:900 clamp(40px,4vw,64px)/.96 'Barlow Condensed',Impact,sans-serif;margin:16px 0}.book-heading em{font-style:normal;color:var(--blue)}.book-count{display:flex;align-items:center;gap:12px}.book-count strong{font:900 64px 'Barlow Condensed';color:#bbcadb}.book-count span{font-size:9px;line-height:1.8;color:var(--muted)}.reading-toolbar{display:flex;align-items:center;gap:8px;margin-bottom:15px}.reading-toolbar>span{flex:1;font-size:10px;font-weight:800;color:var(--blue);letter-spacing:1px;text-transform:uppercase}#lesson{background:white;border:1px solid #dce4ef;border-radius:12px;box-shadow:0 10px 35px #0a315105;padding:32px;min-height:430px;touch-action:pan-y}#lesson h2{font:800 clamp(30px,3vw,44px)/1.05 'Barlow Condensed',Impact,sans-serif;margin:10px 0 20px;color:var(--ink)}.lesson-topline{display:flex;justify-content:space-between;font-size:9px;font-weight:700;color:#8192a8;letter-spacing:1px;text-transform:uppercase}.diagram-wrap{margin:22px 0;background:#edf3fa;border-radius:8px;overflow:hidden;border:1px solid #d8e3f0}.diagram-wrap img{display:block;width:100%;max-height:570px;object-fit:contain}.diagram-caption{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;font-size:9px;color:var(--muted);gap:15px}.lesson-text{display:grid;gap:12px}.lesson-text p{font-size:13px;line-height:1.9;margin:0;white-space:normal;overflow-wrap:anywhere}.lesson-text p+p{padding-top:12px;border-top:1px solid #edf1f7}.lesson-intro{display:flex;align-items:center;gap:25px}.lesson-intro img{width:150px;height:230px;object-fit:contain}.lesson-navigation{display:flex;justify-content:space-between;align-items:center;gap:12px;margin:24px 0 18px}.lesson-navigation span{font-size:10px;font-weight:700;color:var(--muted)}.reading-progress{height:4px;background:#dbe5f0;border-radius:4px;overflow:hidden}#reading-bar{height:100%;background:var(--blue);transition:width .2s}.reading-hint,.book-footer{font-size:9px;line-height:1.8;color:#7b8ca2}.book-footer{margin-top:30px}.search-results{display:grid;gap:7px;margin-bottom:20px}.result-button{text-align:left;padding:12px;background:#fff;border:1px solid #dae4ef;border-radius:5px;font-size:11px;color:var(--ink)}.result-button small{display:block;color:var(--blue);font-size:9px;margin-bottom:4px}#results>p{font-size:11px;color:var(--muted)}#chapter-toggle{display:none}dialog{border:0;border-radius:10px;max-width:96vw;width:1100px;padding:15px;background:#eef3f9}dialog::backdrop{background:#020b1dee}dialog img{display:block;width:100%;margin-top:12px}dialog button{float:right} @media(max-width:1100px){.book-layout{grid-template-columns:230px 1fr}.book-sidebar{padding:25px 18px}.book-count{display:none}.book-header{gap:15px}.book-header strong{font-size:12px}#book-main{padding:30px 24px}}@media(max-width:740px){.login-layout{grid-template-columns:1fr;gap:20px;padding:75px 20px 35px;max-width:480px}.login-brand{min-height:230px}.login-brand>img:first-child{width:135px;margin-bottom:20px}.login-brand h1{font-size:49px}.login-mascot{width:135px;height:210px;right:0;bottom:0}.login-brand p{font-size:10px;max-width:200px}.login-card{padding:28px}.login-card h2{font-size:40px}.login-brand .eyebrow{font-size:8px}.book-header{height:74px;padding:12px 16px;gap:10px}.book-header img{width:100px}.book-header>div{padding-left:12px}.book-header strong{font-size:10px}.book-header small{font-size:7px}.book-header .quiet{padding:9px 7px;font-size:9px}.book-layout{display:block}#chapter-toggle{display:block}.book-sidebar{display:none;position:fixed;top:74px;left:0;width:min(320px,90vw);height:calc(100vh - 74px);z-index:19;box-shadow:20px 0 50px #06142e40}.book-sidebar.open{display:block}#book-main{padding:26px 16px}.book-heading h1{font-size:43px}.book-heading .eyebrow{font-size:8px;letter-spacing:1px}.reading-toolbar>span{font-size:8px;letter-spacing:.5px}.reading-toolbar .quiet{font-size:9px;padding:8px}#lesson{padding:22px 16px;min-height:350px}#lesson h2{font-size:32px}.lesson-text p{font-size:12px}.diagram-wrap{margin:18px -8px}.diagram-caption{padding:10px;font-size:8px}.diagram-caption .quiet{font-size:9px}.lesson-intro{gap:12px}.lesson-intro img{width:95px;height:180px}.lesson-navigation .primary,.lesson-navigation .secondary{padding:14px 15px;font-size:10px}.book-header>div{display:none}.book-header>a{flex:1}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}@media print{.book-header,.book-sidebar,.reading-toolbar,.lesson-navigation,.reading-progress,.reading-hint,.book-heading,.quiet{display:none!important}.book-layout{display:block}#book-main{padding:0}#lesson{border:0;box-shadow:none}.diagram-wrap img{max-height:400px}}