:root{
  --navy:#122b52;
  --navy2:#0c2142;
  --blue:#2176b7;
  --blue2:#4ea2d8;
  --cyan:#dff4ff;
  --teal:#17887a;
  --orange:#e9a23b;
  --ink:#1e2d3d;
  --muted:#607287;
  --paper:#fffdf9;
  --bg:#f4f8fb;
  --line:#dbe5ed;
  --white:#fff;
  --shadow:0 18px 55px rgba(20,47,81,.12);
  --soft-shadow:0 10px 28px rgba(20,47,81,.08);
  --radius:24px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--bg);line-height:1.6}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
.wrap{width:min(1180px,calc(100% - 36px));margin:0 auto}
.skip{position:absolute;left:-9999px;top:0}.skip:focus{left:16px;top:16px;background:white;padding:10px 14px;border-radius:12px;z-index:999}
.institutional{background:#fff;border-bottom:1px solid #edf1f5}
.institutional .wrap{display:flex;justify-content:space-between;align-items:center;gap:24px;min-height:86px}
.institutional-strip{height:58px;width:auto;max-width:min(610px,72vw);object-fit:contain;object-position:left center}
.institutional-note{font-size:.82rem;color:var(--muted);text-align:right;line-height:1.35}
.header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);border-bottom:1px solid var(--line);backdrop-filter:blur(14px)}
.header-inner{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:24px;position:relative}
.brand{display:flex;align-items:center;gap:12px;font-weight:900;color:var(--navy);letter-spacing:-.01em}
.brand-mark{width:42px;height:42px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(145deg,var(--blue),var(--teal));color:#fff;box-shadow:0 10px 22px rgba(33,118,183,.2);font-size:.9rem}
.brand small{display:block;font-size:.72rem;color:var(--muted);font-weight:700;letter-spacing:.01em}
.nav{display:flex;gap:6px;align-items:center;margin-left:auto}.nav-panel{display:contents}.nav-panel-head{display:none}.nav-links{display:contents}.nav a{padding:10px 13px;border-radius:12px;color:#405872;font-weight:800;font-size:.92rem;transition:background .2s ease,color .2s ease,transform .2s ease}.nav a:hover,.nav a[aria-current="page"]{background:#eaf4fb;color:var(--navy)}
.nav-toggle{display:none;width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:13px;padding:0;color:var(--navy);place-items:center;transition:transform .2s ease,box-shadow .2s ease,background .2s ease}.nav-toggle:hover{background:#f7fbff;box-shadow:0 8px 18px rgba(18,43,82,.08)}.nav-toggle-icon{width:18px;height:12px;display:grid;gap:4px}.nav-toggle-icon span{display:block;height:2px;background:var(--navy);border-radius:999px;transition:transform .28s ease,opacity .2s ease,width .28s ease}.nav-toggle[aria-expanded="true"] .nav-toggle-icon span:nth-child(1){transform:translateY(6px) rotate(45deg)}.nav-toggle[aria-expanded="true"] .nav-toggle-icon span:nth-child(2){opacity:0;transform:scaleX(0)}.nav-toggle[aria-expanded="true"] .nav-toggle-icon span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.nav-overlay{position:fixed;inset:0;background:rgba(12,33,66,.42);opacity:0;visibility:hidden;transition:opacity .35s ease,visibility .35s ease;z-index:80;backdrop-filter:blur(2px)}.nav-overlay.open{opacity:1;visibility:visible}
@keyframes navSlideIn{from{opacity:0;transform:translateX(18px)}to{opacity:1;transform:translateX(0)}}
@media(min-width:761px){.nav-panel{display:flex;align-items:center}.nav-panel-head{display:none!important}.nav-links{display:flex;gap:6px;align-items:center}.nav a{opacity:1;transform:none}}
.hero{position:relative;overflow:hidden;background:linear-gradient(160deg,#f8fcff 0%,#eaf5fb 58%,#f7fafc 100%);padding:76px 0 72px}
.hero:before{content:"";position:absolute;width:520px;height:520px;border-radius:50%;background:radial-gradient(circle,rgba(78,162,216,.17),transparent 67%);right:-120px;top:-130px}
.hero-grid{position:relative;display:grid;grid-template-columns:1.08fr .92fr;gap:58px;align-items:center}
.kicker{display:inline-flex;align-items:center;gap:8px;padding:7px 11px;background:#fff;border:1px solid #cfe3ef;border-radius:999px;color:var(--blue);font-weight:900;font-size:.82rem;box-shadow:0 7px 20px rgba(30,80,120,.05)}
h1,h2,h3,h4{color:var(--navy);line-height:1.1;margin:0 0 14px}h1{font-size:clamp(2.8rem,5.5vw,5.1rem);letter-spacing:-.052em}h2{font-size:clamp(2rem,3.5vw,3.25rem);letter-spacing:-.035em}h3{font-size:1.32rem}h4{font-size:1rem}
.lead{font-size:1.14rem;color:#51677e;max-width:720px}.hero-copy strong{color:var(--navy)}
.hero-actions,.actions{display:flex;flex-wrap:wrap;gap:11px;margin-top:25px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 17px;border-radius:13px;border:1px solid transparent;font-weight:900;transition:.18s ease;line-height:1.2}button.btn{font:inherit;cursor:pointer;text-align:center;appearance:none;-webkit-appearance:none}.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--navy);color:#fff;box-shadow:0 12px 26px rgba(18,43,82,.16)}.btn-secondary{background:#fff;color:var(--navy);border-color:#cbdbe7}.btn-blue{background:var(--blue);color:#fff}.btn-soft{background:#eaf4fb;color:var(--navy)}.btn-small{padding:9px 12px;font-size:.88rem}.btn[aria-disabled="true"],.btn.disabled{opacity:.52;cursor:not-allowed;transform:none!important}
.book-stack{min-height:520px;position:relative;display:grid;place-items:center}.book-cover{position:absolute;width:270px;border-radius:9px;overflow:hidden;background:#fff;box-shadow:0 26px 55px rgba(20,38,64,.24);border:1px solid rgba(18,43,82,.1)}.book-cover img{width:100%;aspect-ratio:1323/1871;object-fit:cover}.book-cover:first-child{transform:translate(-110px,-8px) rotate(-6deg)}.book-cover:last-child{transform:translate(105px,18px) rotate(6deg)}.book-cover:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(0,0,0,.08),transparent 5%,transparent 94%,rgba(0,0,0,.08));pointer-events:none}.floating-badge{position:absolute;bottom:10px;left:50%;transform:translateX(-50%);background:rgba(255,255,255,.94);border:1px solid #d6e3ed;padding:9px 13px;border-radius:999px;box-shadow:var(--soft-shadow);font-size:.82rem;font-weight:900;color:var(--navy);white-space:nowrap}
.section{padding:70px 0}.section.white{background:#fff}.section.soft{background:#eef6fa}.section-head{max-width:790px;margin-bottom:32px}.eyebrow{font-size:.78rem;text-transform:uppercase;letter-spacing:.13em;color:var(--teal);font-weight:950;margin-bottom:9px}.section-head p{color:var(--muted);font-size:1.06rem}
.audience{display:grid;grid-template-columns:1fr 1fr;gap:22px}.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--soft-shadow)}.audience .card{padding:27px}.icon{width:48px;height:48px;border-radius:15px;background:#e9f4fb;display:grid;place-items:center;font-size:22px;margin-bottom:15px}.audience p,.manual-info p,.legal-card p,.contact-card p{color:var(--muted)}
.manual-showcase{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:25px}.manual-card{padding:22px;display:grid;grid-template-columns:172px 1fr;gap:24px;align-items:center;overflow:hidden}.manual-card .cover{width:172px;border-radius:9px;box-shadow:0 13px 28px rgba(20,43,70,.16);border:1px solid #e4e9ed}.manual-card p{color:var(--muted);margin:.4rem 0}.chips{display:flex;flex-wrap:wrap;gap:7px;margin:10px 0 14px}.chip{font-size:.76rem;font-weight:900;padding:6px 9px;border-radius:999px;background:#eaf4fb;color:var(--navy)}.chip.green{background:#e7f6f2;color:#176d62}.chip.gold{background:#fff5df;color:#865e17}.authors{font-size:.84rem;color:#667a8f;margin:10px 0 16px}.authors strong{color:#3c536b}
.callout{background:linear-gradient(135deg,#fff8e8,#fffdf7);border:1px solid #efd8a8;border-radius:20px;padding:20px 22px;color:#66512a}.callout strong{color:#51380b}
.partners-panel{display:flex;align-items:center;justify-content:space-between;gap:30px;padding:22px 26px}.partners-panel img:first-child{height:64px;width:auto;max-width:80%}.publisher-logo{height:55px;width:auto;mix-blend-mode:multiply}
.page-hero{padding:52px 0 34px;background:linear-gradient(180deg,#f5fbff,#f7fafc)}.page-hero h1{font-size:clamp(2.35rem,4.2vw,3.8rem)}.page-hero p{max-width:800px;color:var(--muted);font-size:1.06rem}
.library-tabs{display:flex;gap:10px;flex-wrap:wrap;margin:0 0 22px}.library-tab{border:1px solid #cadbe7;background:#fff;color:#36516d;font-weight:900;border-radius:14px;padding:11px 15px}.library-tab.active{background:var(--navy);color:#fff;border-color:var(--navy)}
.reader-shell{background:#fff;border:1px solid var(--line);border-radius:26px;box-shadow:var(--shadow);overflow:hidden}.reader-head{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:20px;align-items:center;padding:20px 22px;border-bottom:1px solid var(--line)}.reader-manual{display:flex;align-items:center;gap:15px;min-width:0}.reader-manual img{width:62px;height:86px;object-fit:cover;border-radius:7px;box-shadow:0 6px 17px rgba(0,0,0,.12)}.reader-manual h2{font-size:1.25rem;margin-bottom:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.reader-manual p{margin:0;color:var(--muted);font-size:.86rem}.reader-actions{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}
.reader-toolbar{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:11px 16px;background:#f5f8fb;border-bottom:1px solid var(--line)}.reader-nav{display:flex;align-items:center;gap:8px}.tool-btn{width:38px;height:38px;border-radius:11px;border:1px solid #cbd9e3;background:#fff;color:var(--navy);font-weight:950;display:grid;place-items:center;line-height:1}.tool-btn:hover{background:#eaf4fb}.tool-btn-label{width:auto;min-width:0;height:38px;padding:0 16px;font-size:.76rem;font-weight:850;white-space:nowrap}.page-box{display:flex;align-items:center;gap:8px;font-size:.88rem;color:var(--muted)}.page-box input{width:62px;border:1px solid #cbd9e3;border-radius:10px;padding:8px;text-align:center;color:var(--navy);font-weight:800;background:#fff}
.book-stage{background:radial-gradient(circle at 50% 30%,#315579,#142c4a 65%,#0e2139);padding:34px 34px 28px;min-height:650px;position:relative;overflow:hidden}.book-stage:before{content:"";position:absolute;left:5%;right:5%;bottom:14px;height:28px;border-radius:50%;background:rgba(0,0,0,.25);filter:blur(18px)}.book-spread{position:relative;z-index:2;display:flex;justify-content:center;align-items:stretch;max-width:620px;margin:0 auto;transition:opacity .18s ease,transform .18s ease}.book-spread.turning{opacity:.55;transform:scale(.992)}.paper-page{background:#fff;width:100%;aspect-ratio:0.707/1;min-height:560px;box-shadow:0 18px 34px rgba(0,0,0,.24);position:relative;overflow:hidden;border:1px solid rgba(255,255,255,.6);border-radius:7px}.paper-page iframe{width:100%;height:100%;border:0;display:block;background:#fff}.page-corner{position:absolute;bottom:7px;right:8px;font-size:.7rem;color:#8c9aa5;background:rgba(255,255,255,.82);padding:3px 7px;border-radius:6px;pointer-events:none}
.reader-note{padding:13px 18px;border-top:1px solid var(--line);background:#fffdf8;color:#745b2b;font-size:.83rem}.reader-note strong{color:#60430e}
.download-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-top:26px}.download-card{padding:22px;display:flex;gap:18px;align-items:center}.download-card img{width:82px;height:112px;object-fit:cover;border-radius:7px}.download-card p{margin:3px 0;color:var(--muted);font-size:.9rem}.download-card .actions{margin-top:11px}
.contact-grid{display:grid;grid-template-columns:.78fr 1.22fr;gap:28px;align-items:start}.contact-card,.form-card{padding:28px}.email-link{display:inline-flex;align-items:center;gap:9px;color:var(--blue);font-weight:950;word-break:break-word}.contact-list{list-style:none;margin:18px 0 0;padding:0}.contact-list li{padding:12px 0;border-bottom:1px solid #e8eef3;color:#5b7187}.contact-list strong{display:block;color:var(--navy)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}.field{display:flex;flex-direction:column;gap:6px}.field.full{grid-column:1/-1}.field label{font-weight:850;color:#3c5570;font-size:.88rem}.field input:not([type="checkbox"]):not([type="radio"]),.field select,.field textarea{width:100%;border:1px solid #cbd9e4;background:#fff;border-radius:11px;padding:11px 12px;color:var(--ink);outline:none}.field textarea{min-height:145px;resize:vertical}.field input:not([type="checkbox"]):not([type="radio"]):focus,.field select:focus,.field textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(33,118,183,.1)}.help{font-size:.78rem;color:var(--muted)}.field-consent{margin-top:2px}.field-consent .check{display:flex;align-items:flex-start;gap:10px;font-weight:500;line-height:1.45;color:#4a6178;cursor:pointer}.field-consent .check input[type="checkbox"]{width:1.05rem;height:1.05rem;margin:0.2rem 0 0;flex:0 0 auto;padding:0;border:1px solid #b8c9d8;border-radius:4px;accent-color:var(--blue);cursor:pointer}.field-consent .check span{flex:1;min-width:0}.form-status{margin-top:12px;font-size:.86rem;color:#296c63;display:none}.form-status.show{display:block}.form-status.error{color:#9b3b3b}.field-honeypot{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}.recaptcha-note{margin-top:10px;font-size:.72rem;color:#8a9bb0;line-height:1.45}.recaptcha-note a{color:#5f7690;text-decoration:underline}
.legal-intro{display:grid;grid-template-columns:.92fr 1.08fr;gap:24px;align-items:stretch}.legal-card{padding:26px}.legal-card ul{margin:12px 0 0;padding-left:20px;color:var(--muted)}.legal-card li{margin:8px 0}.legal-ok{border-top:5px solid var(--teal)}.legal-no{border-top:5px solid #c85d5d}.legal-full{margin-top:22px}.quote-box{background:#eef6fa;border:1px solid #d2e5f0;border-radius:16px;padding:16px 18px;color:#486176;font-size:.92rem}.legal-warning{margin-top:20px;background:#fff6e3;border:1px solid #efd6a5;border-radius:16px;padding:15px 17px;color:#6d5427;font-size:.88rem}
.footer{margin-top:60px;background:var(--navy2);color:#dfe9f2}.footer-inner{padding:31px 0;display:grid;grid-template-columns:1.3fr .8fr .9fr;gap:30px;align-items:start}.footer h4{color:#fff;margin-bottom:9px}.footer p,.footer small{color:#b6c6d4;font-size:.84rem}.footer a{color:#fff;font-weight:750}.footer-links{display:grid;gap:7px}.footer .publisher-logo{filter:brightness(0) invert(1);mix-blend-mode:normal;opacity:.92;margin-top:8px}.copyright{border-top:1px solid rgba(255,255,255,.12);padding:15px 0;color:#9fb1c1;font-size:.78rem}
.toast{position:fixed;right:20px;bottom:20px;background:#153b3a;color:#fff;padding:14px 16px;border-radius:14px;box-shadow:var(--shadow);z-index:100;max-width:370px}
@media(max-width:980px){.hero-grid,.contact-grid,.legal-intro{grid-template-columns:1fr}.book-stack{min-height:430px;margin-top:10px}.manual-showcase{grid-template-columns:1fr}.reader-head{grid-template-columns:1fr}.reader-actions{justify-content:flex-start}.download-grid{grid-template-columns:1fr}.footer-inner{grid-template-columns:1fr 1fr}.institutional-note{display:none}.paper-page{min-height:450px}}
@media(max-width:760px){.institutional .wrap{min-height:68px}.institutional-strip{height:48px;max-width:100%}.nav-toggle{display:grid;flex-shrink:0}.nav{position:fixed;top:0;right:0;width:min(320px,88vw);height:100dvh;max-height:100vh;margin-left:0;background:#fff;box-shadow:-16px 0 48px rgba(12,33,66,.16);transform:translateX(105%);transition:transform .42s cubic-bezier(.22,1,.36,1);z-index:90;flex-direction:column;align-items:stretch;padding:0;gap:0;pointer-events:none;overflow:hidden}.nav.open{transform:translateX(0);pointer-events:auto}.nav-panel{display:flex;flex-direction:column;height:100%;padding:18px 18px 28px}.nav-panel-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;padding-bottom:16px;border-bottom:1px solid var(--line)}.nav-panel-title{font-weight:900;color:var(--navy);font-size:1.05rem;letter-spacing:-.01em}.nav-close{width:42px;height:42px;border:1px solid var(--line);border-radius:13px;background:#fff;display:grid;place-items:center;transition:transform .2s ease,background .2s ease}.nav-close:hover{background:#eaf4fb;transform:rotate(90deg)}.nav-close-icon{width:16px;height:16px;position:relative;display:block}.nav-close-icon::before,.nav-close-icon::after{content:"";position:absolute;left:50%;top:50%;width:16px;height:2px;background:var(--navy);border-radius:999px}.nav-close-icon::before{transform:translate(-50%,-50%) rotate(45deg)}.nav-close-icon::after{transform:translate(-50%,-50%) rotate(-45deg)}.nav-links{display:flex;flex-direction:column;gap:8px}.nav a{padding:14px 16px;border-radius:14px;font-size:1rem;opacity:0;transform:translateX(18px)}.nav.open .nav-links a{animation:navSlideIn .45s cubic-bezier(.22,1,.36,1) forwards}.nav.open .nav-links a:nth-child(1){animation-delay:.06s}.nav.open .nav-links a:nth-child(2){animation-delay:.11s}.nav.open .nav-links a:nth-child(3){animation-delay:.16s}.nav.open .nav-links a:nth-child(4){animation-delay:.21s}body.nav-open{overflow:hidden}.hero{padding:52px 0}.book-cover{width:220px}.book-cover:first-child{transform:translate(-86px,-6px) rotate(-5deg)}.book-cover:last-child{transform:translate(84px,17px) rotate(5deg)}.audience{grid-template-columns:1fr}.manual-card{grid-template-columns:132px 1fr}.manual-card .cover{width:132px}.book-stage{padding:24px 12px;min-height:590px}.book-spread{max-width:100%}.paper-page{min-height:520px}.reader-toolbar{align-items:flex-start;flex-wrap:wrap}.footer-inner{grid-template-columns:1fr}}
@media(max-width:540px){.wrap{width:min(100% - 24px,1180px)}h1{font-size:2.65rem}.manual-card{grid-template-columns:1fr}.manual-card .cover{width:100%;max-width:220px;margin:0 auto}.book-stack{min-height:360px}.book-cover{width:178px}.book-cover:first-child{transform:translate(-70px,-4px) rotate(-5deg)}.book-cover:last-child{transform:translate(68px,12px) rotate(5deg)}.partners-panel{flex-direction:column;align-items:flex-start}.partners-panel img:first-child{max-width:100%;height:auto}.form-grid{grid-template-columns:1fr}.reader-manual h2{white-space:normal}.reader-actions{width:100%}.reader-actions .btn{flex:1}.download-card{align-items:flex-start}.book-stage{min-height:520px}.paper-page{min-height:460px}.footer{margin-top:40px}}
.reader-shell:fullscreen{background:#0e2139;overflow:auto}.reader-shell:fullscreen .book-stage{min-height:calc(100vh - 150px)}