:root {
    --navy:#0b1b3c;
    --navy-2:#122a55;
    --navy-3:#1d3f78;
    --paper:#f4efe3;
    --paper-2:#fffdf8;
    --ink:#17243e;
    --muted:#5b6679;
    --gold:#b77b1f;
    --gold-soft:#e6c980;
    --cyan:#08779d;
    --cyan-soft:#d8eff6;
    --green:#2c6f62;
    --line:#d9d0bd;
    --shadow:0 18px 45px rgba(22,33,58,.10);
    --shadow-lg:0 30px 70px rgba(22,33,58,.18);
    --danger:#9f2d2d;
    --success:#23644f;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:120px}
body{
    margin:0;
    color:var(--ink);
    line-height:1.65;
    font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
    background:
      radial-gradient(circle at 10% 0%,rgba(30,96,170,.09),transparent 28%),
      radial-gradient(circle at 90% 12%,rgba(183,123,31,.08),transparent 26%),
      var(--paper);
}
a{color:#075f84;text-underline-offset:4px}
a:hover{color:#084b6a}
img,video{max-width:100%}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
:focus-visible{outline:3px solid #e8a923;outline-offset:4px}
.container{width:calc(100% - 40px);max-width:1200px;margin-inline:auto}
main{padding-bottom:76px}
.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip-link{position:absolute;left:15px;top:-100px;background:#fff;color:var(--navy);padding:12px 16px;z-index:400;border-radius:8px}
.skip-link:focus{top:8px}

/* Header */
.eyebrow-strip{background:#061126;color:#dbe8ff;padding:7px 20px;text-align:center;font-size:.78rem;letter-spacing:.02em}
.global-site-header{position:sticky;top:0;z-index:100;background:rgba(11,27,60,.97);border-bottom:1px solid rgba(255,255,255,.12);box-shadow:0 4px 20px rgba(0,0,0,.12);backdrop-filter:blur(10px)}
.primary-navigation{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:15px 0}
.brand-logo{color:#fff;font-weight:850;line-height:1.15;text-decoration:none;font-size:1.05rem;white-space:nowrap}
.brand-logo span{color:#7ed8f5}
.nav-links{display:flex;list-style:none;gap:19px;align-items:center;margin:0;padding:0}
.nav-links a{color:#eff5ff;font-size:.89rem;font-weight:700;text-decoration:none}
.nav-links a:hover,.nav-links a[aria-current]{color:#8de2ff;text-decoration:underline}
.nav-search{padding:7px 10px;border-radius:999px;border:1px solid rgba(126,216,245,.45)}
.nav-buy{border:1px solid #8de2ff;border-radius:8px;padding:9px 13px;display:inline-block}
.menu-toggle{border:1px solid #8de2ff;background:transparent;color:white;border-radius:8px;padding:9px 14px}

/* Buttons and shared surfaces */
.btn-primary,.btn-outline{display:inline-block;border-radius:8px;padding:11px 19px;font-weight:800;text-align:center;text-decoration:none;border:1px solid transparent;transition:.2s ease}
.btn-primary{background:linear-gradient(135deg,#d29a34,#efb54b);color:#18233a;border-color:#c98c22;box-shadow:0 8px 18px rgba(171,112,18,.18)}
.btn-primary:hover{transform:translateY(-1px);background:linear-gradient(135deg,#e0a640,#f3c363);color:#111a2c}
.btn-outline{border-color:#1e7597;color:#0c6283;background:rgba(255,255,255,.68)}
.btn-outline:hover{background:#0f6f92;color:#fff;transform:translateY(-1px)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:7px 12px;border-radius:999px;border:1px solid rgba(183,123,31,.42);background:rgba(255,255,255,.72);color:#8b5b13;font-size:.77rem;font-weight:850;letter-spacing:.08em;text-transform:uppercase;margin-bottom:16px}
.section-shell{margin-top:68px}
.section-header.center{text-align:center}
.section-header h2,.section-shell>h2{color:var(--navy);font-size:clamp(1.65rem,3vw,2.25rem);line-height:1.2;margin-bottom:10px}
.section-header.center p{max-width:830px;margin:10px auto 0;color:var(--muted)}
.page-intro{padding-top:58px;max-width:960px}
.page-intro h1{font-size:clamp(2.25rem,5vw,4rem);line-height:1.08;margin:10px 0 20px;color:var(--navy)}
.page-intro p{color:var(--muted);font-size:1.09rem}
.page-links{display:flex;gap:14px;flex-wrap:wrap;margin-top:24px}
.notice{padding:22px 26px;border-left:4px solid var(--gold);background:#fffaf0;color:var(--muted);border-radius:0 12px 12px 0;box-shadow:var(--shadow)}

/* Anchor navigation */
.anchor-bar{display:flex;flex-wrap:wrap;gap:9px;margin-top:26px;padding:12px;border:1px solid var(--line);border-radius:14px;background:rgba(255,255,255,.74);box-shadow:0 8px 24px rgba(22,33,58,.06)}
.anchor-bar a{padding:8px 11px;border-radius:999px;text-decoration:none;color:#24425f;font-size:.88rem;font-weight:750;background:#f8fbfc;border:1px solid #d4e4e9}
.anchor-bar a:hover{background:#0d6b8d;color:#fff;border-color:#0d6b8d}
.home-anchor-bar{margin-top:20px}

/* Home hero */
.book-hero{padding:52px 0 62px;border-bottom:1px solid #ded3bd;background:
    linear-gradient(115deg,rgba(255,253,248,.98),rgba(239,245,252,.96)),
    repeating-linear-gradient(90deg,rgba(11,27,60,.03) 0 1px,transparent 1px 44px)}
.hero-grid{display:grid;grid-template-columns:minmax(260px,380px) 1fr;gap:58px;align-items:center}
.book-cover-wrapper{max-width:360px;margin:0 auto;border-radius:10px;overflow:hidden;background:#fff;box-shadow:var(--shadow-lg);border:1px solid #ddd2bf;transition:.25s ease}
.book-cover-wrapper:hover{transform:translateY(-6px) rotate(-.4deg);box-shadow:0 36px 78px rgba(19,39,78,.23)}
.book-cover-wrapper img{width:100%;display:block}
.book-title{font-size:clamp(2.7rem,5.2vw,4.45rem);line-height:1.01;font-weight:900;letter-spacing:-1.7px;color:var(--navy);margin:0 0 15px}
.book-subtitle{font-size:1.38rem;line-height:1.4;color:#2a5d87;font-weight:750;margin:0 0 18px}
.authors-line{color:#24354f;font-size:1.07rem;font-weight:750;margin:0 0 22px}
.book-lede{color:#4f5e73;font-size:1.11rem;line-height:1.75;max-width:820px;margin:0 0 28px}
.hero-buttons{display:flex;flex-wrap:wrap;gap:11px}
.meta-strip{margin-top:27px;display:flex;flex-wrap:wrap;gap:9px}
.meta-chip{padding:8px 11px;border:1px solid #ddd2bd;border-radius:8px;color:#5a6170;background:rgba(255,253,248,.92);font-size:.82rem}

/* Content cards */
.two-col-copy{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:38px;margin-top:31px;color:#34425a;font-size:1.03rem;line-height:1.72}
.highlight-panel{display:grid;grid-template-columns:1.12fr .88fr;gap:34px;background:linear-gradient(135deg,#fffdf8,#eef6fb);border:1px solid #d8d0c1;border-radius:18px;padding:38px;margin-top:34px;align-items:center;box-shadow:var(--shadow)}
.highlight-panel h3{margin-top:0;color:var(--navy);font-size:1.8rem}
.highlight-panel p{color:var(--muted);line-height:1.7}
.highlight-panel img{width:100%;border-radius:11px;border:1px solid #ddd4c2;box-shadow:0 12px 32px rgba(19,39,78,.10)}
.book-highlights-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;margin-top:32px}
.book-highlight-card{background:rgba(255,253,248,.93);border:1px solid #d9d0bf;border-radius:14px;padding:24px;box-shadow:0 10px 28px rgba(29,45,77,.06);transition:.2s ease}
.book-highlight-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.book-highlight-card strong,.book-highlight-card h2{display:block;color:var(--navy);font-size:1.12rem;margin:0 0 9px}
.book-highlight-card p{color:var(--muted);line-height:1.58;margin:0 0 10px}

/* Media */
.media-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:26px;margin-top:35px}
.media-card{background:linear-gradient(150deg,#10254e,#0b1834);border:1px solid rgba(255,255,255,.10);padding:26px;border-radius:15px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:18px;color:#fff}
.media-card h2,.media-card h3{margin:0;padding-bottom:11px;border-bottom:2px solid #d6a03c;color:#fff;font-size:1.25rem}
.media-card p{color:#d4deef;margin:0;line-height:1.55}
.media-card a{color:#84defc}
.audio-banner{width:100%;aspect-ratio:16/9;object-fit:contain;background:#fff;border-radius:10px;border:1px solid rgba(255,255,255,.14);display:block}
.media-card audio,.media-card video{width:100%}
.media-status{color:#ffd778!important;font-size:.9rem}

/* Frameworks */
.framework-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:22px;margin-top:36px}
.framework-card{background:#fffdf8;border:1px solid #d9d0bf;padding:27px;border-radius:14px;box-shadow:0 9px 28px rgba(29,45,77,.05);scroll-margin-top:125px}
.framework-card h4{color:var(--navy);font-size:1.17rem;margin:0 0 13px;border-bottom:2px solid #d9a23d;padding-bottom:10px}
.framework-card p{margin-bottom:0;color:var(--muted);line-height:1.6}
.infographic-wrap{margin-top:34px}
.infographic-wrap img{width:100%;border-radius:14px;border:1px solid #d7cfbf;display:block;box-shadow:var(--shadow)}

/* Authors + identifiers */
.authors-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:25px;margin-top:32px}
.author-card{background:linear-gradient(145deg,#fffdf9,#edf5f8);border:1px solid #d8d0c0;border-radius:15px;padding:30px;box-shadow:var(--shadow)}
.author-card h3{color:var(--navy);margin:0 0 7px;font-size:1.5rem}
.author-role{color:#0b6b8f;font-weight:800;font-size:.93rem;margin-bottom:15px}
.author-card p{color:var(--muted);line-height:1.67}
.together-box{margin-top:24px;padding:24px 28px;border-radius:12px;border:1px solid #d6c89e;background:#fff9e9;color:#39465c;line-height:1.65;text-align:center}
.id-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:15px;margin-top:28px}
.id-card{padding:18px;background:#fffdf8;border:1px solid #d9d0bf;border-radius:11px;text-align:center;box-shadow:0 8px 20px rgba(29,45,77,.05)}
.id-card small{display:block;color:#697386;text-transform:uppercase;letter-spacing:.08em;margin-bottom:6px}
.id-card strong{color:var(--navy);font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.95rem}

/* Calculator */
.calculator-shell{padding:34px;background:linear-gradient(145deg,#112956,#0a1834);border-radius:18px;border:1px solid rgba(255,255,255,.11);box-shadow:var(--shadow-lg);color:#fff}
.calculator-shell h2{color:#fff!important}
.calculator-shell>div>p,.calculator-note{color:#ccd9eb!important}
.calc-container{display:grid;grid-template-columns:minmax(280px,.85fr) minmax(0,1.3fr);gap:30px;margin-top:35px;text-align:left}
.calc-form{background:rgba(255,255,255,.06);padding:25px;border-radius:11px;border:1px solid rgba(255,255,255,.10)}
.calc-group{margin-bottom:20px}.calc-group:last-child{margin-bottom:0}
.calc-group label{display:block;font-size:.9rem;font-weight:700;margin-bottom:8px;color:#fff}
.calc-input{width:100%;padding:12px;background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.20);border-radius:7px;color:#fff;font-size:1rem}
.calc-input:focus{border-color:#8de2ff;outline:none}
.calc-results{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.calc-card{background:rgba(3,9,24,.52);border:1px solid rgba(255,255,255,.12);border-radius:10px;padding:18px 10px;text-align:center}
.calc-card h5{margin:0 0 10px;font-size:.82rem;text-transform:uppercase;color:#c6d2e5;letter-spacing:1px}
.calc-val{font-size:clamp(1.1rem,2.3vw,1.8rem);font-weight:850;color:#fff;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;overflow-wrap:anywhere}
.calc-verdict{padding:20px;border-radius:8px;background:rgba(126,216,245,.10);border:1px solid rgba(126,216,245,.28);color:#d8f4ff;font-size:.95rem;line-height:1.5;display:none}
.calc-verdict.active{display:block}
.calculator-note{font-size:.89rem}

/* Series */
.page-series{background:linear-gradient(#f7f2e8,#eef4f7)}
.series-intro{max-width:1020px}
.series-banner-wrap{margin-top:34px}
.series-banner-wrap img{width:100%;display:block;border-radius:16px;border:1px solid #d3c8b4;box-shadow:var(--shadow-lg)}
.series-journey{display:grid;grid-template-columns:1fr auto 1fr auto 1fr;align-items:center;gap:14px;margin:30px auto 0;max-width:950px}
.series-journey>div:not(.journey-arrow){background:#fffdf8;border:1px solid #d8ceb9;border-radius:13px;padding:17px;text-align:center;box-shadow:0 8px 22px rgba(22,33,58,.05)}
.series-journey span{display:inline-grid;place-items:center;width:32px;height:32px;border-radius:50%;background:var(--navy);color:#fff;font-weight:850;margin-bottom:8px}
.series-journey strong{display:block;color:var(--navy);font-size:1.06rem}.series-journey small{color:var(--muted)}
.journey-arrow{font-size:1.6rem;color:#a46b16;font-weight:900}
.series-book-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;margin-top:34px}
.series-book-card{background:#fffdf8;border:1px solid #d9d0bf;border-top:5px solid #2d64ad;border-radius:15px;padding:26px;box-shadow:var(--shadow);scroll-margin-top:125px}
.series-book-card.book-two{border-top-color:#b87b1f}.series-book-card.book-three{border-top-color:#2b7a67}
.series-book-card h2{color:var(--navy);font-size:1.55rem;line-height:1.2;margin:4px 0 16px}
.series-book-card p{color:var(--muted)}
.series-book-card .series-purpose{color:#38455b}
.series-book-card .byline{font-weight:750;color:#33425c}.small-link{font-size:.88rem}
.book3-vote-section{margin-top:74px;padding:64px 0;background:linear-gradient(145deg,#0d2349,#142f5d);color:#fff;border-block:1px solid rgba(255,255,255,.10)}
.book3-vote-section .section-header h2{color:#fff}.book3-vote-section .section-header p{color:#d3deed}.book3-vote-section .eyebrow{background:rgba(255,255,255,.07);color:#f0c569;border-color:rgba(240,197,105,.45)}
.vote-layout{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:30px;align-items:start;margin-top:34px}
.vote-poster-card,.vote-form-card{background:#fffdf8;color:var(--ink);border-radius:16px;padding:20px;box-shadow:0 24px 60px rgba(0,0,0,.20)}
.vote-poster-card img{display:block;width:100%;border-radius:10px;border:1px solid #d8cfbe}.vote-note{color:var(--muted);font-size:.9rem;margin:14px 4px 4px}
.book3-vote-form fieldset{border:0;padding:0;margin:0 0 24px}.book3-vote-form legend{font-size:1.25rem;font-weight:850;color:var(--navy);margin-bottom:4px}.field-help{color:var(--muted);margin-top:0}
.vote-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.vote-option{display:flex;gap:10px;align-items:flex-start;padding:12px;border:1px solid #d9d0bf;border-radius:10px;background:#fbfaf6;cursor:pointer}.vote-option:hover{border-color:#6aa8bc;background:#f3fbfd}.vote-option input{margin-top:4px;accent-color:#0d6c8e}.vote-option span{font-weight:700;color:#28384f}
.form-group{margin-top:18px}.form-group label{display:block;font-weight:800;color:#263650;margin-bottom:6px}.form-group label span{font-weight:500;color:#7a8290}.form-group input,.form-group textarea{width:100%;padding:11px 12px;border:1px solid #cfc6b5;border-radius:8px;background:#fff;color:#18263e}.form-group textarea{resize:vertical;min-height:110px}.form-two-col{display:grid;grid-template-columns:1fr 1fr;gap:15px}.vote-submit{margin-top:20px;width:100%}.form-privacy{font-size:.79rem;color:#6c7481;line-height:1.45}.form-status{padding:12px 14px;border-radius:9px;margin-bottom:18px;font-weight:700}.form-status.success{background:#e5f4ed;color:#1d5d48;border:1px solid #9fcdbb}.form-status.error{background:#fbeaea;color:#8c2828;border:1px solid #e4aaaa}.hp-field{position:absolute!important;left:-9999px!important;width:1px!important;height:1px!important;overflow:hidden!important}

/* Search */
.site-search-overlay{position:fixed;inset:0;z-index:300;background:rgba(4,12,28,.72);padding:6vh 18px;overflow:auto;backdrop-filter:blur(5px)}
.site-search-dialog{max-width:900px;margin:0 auto;background:#fffdf8;border:1px solid #d8cfbd;border-radius:18px;box-shadow:0 30px 100px rgba(0,0,0,.36);padding:24px;color:var(--ink)}
.site-search-head{display:flex;justify-content:space-between;gap:20px;align-items:flex-start}.site-search-head h2{color:var(--navy);margin:3px 0 8px;font-size:1.5rem}.search-kicker{font-size:.76rem;text-transform:uppercase;letter-spacing:.1em;font-weight:850;color:#906019}.search-close{width:40px;height:40px;border-radius:50%;border:1px solid #cfc6b4;background:#fff;color:var(--navy);font-size:1.6rem;line-height:1}.site-search-form{display:grid;grid-template-columns:1fr 180px auto;gap:10px;margin-top:18px}.site-search-form input,.site-search-form select,.search-page-controls input,.search-page-controls select{min-width:0;padding:11px 12px;border:1px solid #c9c0af;border-radius:8px;background:white;color:#17243e}.search-suggestions{display:flex;gap:8px;flex-wrap:wrap;margin:15px 0}.search-suggestions button,.search-suggestions a{border:1px solid #d4c9b5;border-radius:999px;padding:7px 10px;background:#faf7ef;color:#38516c;font-size:.83rem;text-decoration:none}.search-suggestions button:hover,.search-suggestions a:hover{background:#edf8fb;border-color:#75adc1}.site-search-results{display:grid;gap:10px;max-height:48vh;overflow:auto;padding-right:4px}.search-result-card{padding:16px;border:1px solid #ddd4c4;border-radius:11px;background:#fff}.search-result-card h2{font-size:1.05rem;margin:3px 0 5px}.search-result-card h2 a{color:var(--navy);text-decoration:none}.search-result-card p{margin:0;color:var(--muted)}.search-result-category{font-size:.72rem;text-transform:uppercase;letter-spacing:.08em;font-weight:850;color:#8b5b13}.search-empty{color:var(--muted);padding:18px 0}.search-help{font-size:.78rem;color:#7a8190;margin:14px 0 0}.search-help kbd{background:#eef0f3;border:1px solid #c7ccd3;border-bottom-width:2px;border-radius:5px;padding:1px 5px;color:#28354a}
.search-page-intro{max-width:980px}.search-page-shell{background:#fffdf8;border:1px solid #d8cfbe;border-radius:16px;padding:28px;box-shadow:var(--shadow)}.search-page-form>label{display:block;font-weight:850;color:var(--navy);margin-bottom:8px}.search-page-controls{display:grid;grid-template-columns:1fr 210px auto;gap:10px}.search-page-suggestions{margin-top:16px}.search-start-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px;margin-top:28px}.search-start-grid a{display:block;padding:20px;border:1px solid #d9d0bf;border-radius:12px;text-decoration:none;background:#faf8f2}.search-start-grid strong{display:block;color:var(--navy);font-size:1.05rem}.search-start-grid span{display:block;color:var(--muted);margin-top:5px}.search-summary{margin:24px 0 12px;color:#44536a}.search-result-list{display:grid;gap:12px}

/* Footer */
.global-site-footer{padding:38px 0 26px;border-top:1px solid rgba(255,255,255,.10);background:#061126;color:#e6eefb}
.footer-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:30px;align-items:start}.global-site-footer strong{font-size:1.25rem}.global-site-footer p{color:#c7d3e4}.footer-links{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:10px 20px}.footer-links a{color:#78d8fa}.footer-legal{font-size:.82rem;color:#aebbd0!important;margin-top:22px;text-align:center}

[hidden]{display:none!important}
@media (min-width:901px){.menu-toggle{display:none}}
@media (max-width:1000px){.nav-links{gap:12px}.nav-links a{font-size:.84rem}.series-book-grid{grid-template-columns:1fr}.series-book-card{max-width:900px;width:100%;margin:auto}}
@media (max-width:900px){
    .primary-navigation{flex-wrap:wrap}.nav-links{width:100%;flex-wrap:wrap;gap:12px}.nav-links.menu-closed{display:none}
    .hero-grid,.highlight-panel,.two-col-copy,.authors-grid,.media-grid,.vote-layout{grid-template-columns:1fr}.hero-copy{text-align:center}.hero-buttons,.meta-strip{justify-content:center}.book-cover-wrapper{max-width:315px}
    .calc-container{grid-template-columns:1fr}.series-journey{grid-template-columns:1fr}.journey-arrow{transform:rotate(90deg);text-align:center}.site-search-form,.search-page-controls{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}.footer-links{justify-content:flex-start}
}
@media (max-width:620px){
    .container{width:calc(100% - 28px)}.section-shell{margin-top:46px}.highlight-panel,.media-card,.author-card,.framework-card{padding:21px}.framework-grid,.book-highlights-grid,.vote-options,.form-two-col,.search-start-grid{grid-template-columns:1fr}.hero-buttons{flex-direction:column}.calculator-shell{padding:18px}.calc-form{padding:17px}.calc-results{grid-template-columns:1fr}.book-subtitle{font-size:1.16rem}.anchor-bar{gap:7px}.anchor-bar a{font-size:.8rem}.book3-vote-section{padding:48px 0}.site-search-dialog{padding:18px}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}}
@media print{body{background:#fff;color:#000}.global-site-header,.eyebrow-strip,.global-site-footer,.hero-buttons,.anchor-bar,audio,video,.site-search-overlay,.book3-vote-section{display:none!important}.container{width:100%}}