.skip-link{position:fixed;left:18px;top:-70px;z-index:100;background:var(--green);color:#050709;padding:12px 16px;font-weight:800}
.architecture-page{--green:#c4c8cd;--blue:#7f858c;--line:#30363b;--panel:#111518;--portrait-tint-a:196,200,205;--portrait-tint-b:97,111,124}
.system-page{--green:#ff3138;--blue:#d9dfe4;--line:#3a2828;--panel:#171011;--portrait-tint-a:255,49,56;--portrait-tint-b:217,223,228}
.tales-page{--green:#f2b34f;--blue:#77a83c;--line:#30372a;--panel:#11160f;--portrait-tint-a:242,179,79;--portrait-tint-b:119,168,60}
.architecture-page .book-hero:after{background:radial-gradient(circle,rgba(183,190,198,.2),transparent 67%)}
.system-page .book-hero:after{background:radial-gradient(circle,rgba(255,49,56,.2),transparent 67%)}
.tales-page .book-hero:after{background:radial-gradient(circle,rgba(119,168,60,.19),transparent 67%)}
.architecture-page .audience-section{background:linear-gradient(135deg,#15191c,#080a0c 64%)}
.system-page .audience-section{background:linear-gradient(135deg,#1b090b,#09090a 64%)}
.tales-page .audience-section{background:linear-gradient(135deg,#10170a,#090b08 64%)}
.architecture-page .framework-shift:before{content:"STRUCTURE"}
.system-page .framework-shift:before{content:"CODE"}
.tales-page .framework-shift:before{content:"LESSON"}
.skip-link:focus{top:16px}
.hybrid-book-page{padding-bottom:74px}
.hybrid-book-page:not(.architecture-page):not(.system-page):not(.tales-page){--portrait-tint-a:186,255,57;--portrait-tint-b:23,140,255}
.hybrid-hero{min-height:calc(100vh - 88px);padding-top:clamp(44px,5vw,72px);padding-bottom:clamp(44px,5vw,72px)}
.hybrid-hero .hero-copy h1{font-size:clamp(56px,7vw,116px);margin:24px 0}
.hybrid-hero .hero-subtitle{margin-bottom:12px}
.hybrid-hero .hero-promise{margin-bottom:24px}
.hero-callout{margin:0 0 12px;color:var(--green);font:800 16px var(--display);text-transform:uppercase;letter-spacing:.16em}
.hero-promise strong,.byline strong{color:var(--white)}
.byline{margin:-4px 0 22px;color:var(--muted);font-size:13px;text-transform:uppercase;letter-spacing:.09em}
.format-row .button{flex-direction:column;gap:1px;padding-top:8px;padding-bottom:8px}
.format-row .button small{font-size:10px;letter-spacing:.08em;opacity:.72}
.page-jump{position:sticky;top:0;z-index:15;display:flex;justify-content:center;align-items:center;gap:clamp(16px,2.5vw,38px);padding:15px 24px;background:rgba(5,7,9,.94);border-bottom:1px solid var(--line);backdrop-filter:blur(16px);overflow:auto;white-space:nowrap}
.page-jump span,.page-jump a{font-size:11px;text-transform:uppercase;letter-spacing:.11em;font-weight:800}
.page-jump span{color:var(--green)}
.page-jump a{color:#aab5ba}
.page-jump a:hover{color:var(--blue)}
.electric-list{list-style:none;margin:28px 0;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.electric-list li{position:relative;padding:14px 16px 14px 38px;background:#0b1115;border:1px solid var(--line);color:#dfe7ea;font-size:14px}
.electric-list li:before{content:"";position:absolute;left:17px;top:21px;width:7px;height:7px;background:var(--green);box-shadow:0 0 16px rgba(186,255,57,.6)}
.section-intro{max-width:900px;margin-bottom:50px}
.install-section{background:var(--charcoal)}
.install-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.install-grid article{position:relative;min-height:230px;background:var(--panel);padding:34px}
.install-grid article:after{content:"";position:absolute;left:0;bottom:0;width:70px;height:3px;background:linear-gradient(90deg,var(--green),var(--blue))}
.install-grid span{font:900 48px/1 var(--display);color:transparent;-webkit-text-stroke:1px #45545d}
.install-grid h3,.audience-grid h3,.framework-list h3{font:800 25px/1 var(--display);text-transform:uppercase;margin:25px 0 12px}
.install-grid p,.audience-grid p,.framework-list p{color:var(--muted);font-size:14px;margin:0}
.framework-shift:before{content:"SYSTEM"}
.framework-list{display:grid;border-top:1px solid #ccd2d4}
.framework-list article{display:grid;grid-template-columns:64px 1fr;gap:20px;padding:22px 0;border-bottom:1px solid #ccd2d4}
.framework-list article>span{font:900 25px var(--display);color:#0877e5}
.framework-list h3{margin:0 0 5px;color:#07090b}
.framework-list p{color:#455159;font-size:15px}
.audience-section{background:linear-gradient(135deg,#06101a,#080b0d 60%)}
.audience-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.audience-grid article{background:#0b1115;padding:30px;min-height:180px}
.audience-grid h3{color:var(--green);margin-top:0}
.audience-line{margin:34px 0 0;font:700 clamp(20px,2.6vw,34px)/1.2 var(--display);text-transform:uppercase;max-width:840px}
.metadata-section{background:#f7fafb;color:#090c0e}
.metadata-head{display:grid;grid-template-columns:1fr .65fr;gap:80px;align-items:end;margin-bottom:55px}
.metadata-head>p{color:#4d5a61;font-size:17px}
.metadata-grid{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:#cfd6d9;border:1px solid #cfd6d9}
.metadata-grid dl{margin:0;background:white}
.metadata-grid dl div{display:grid;grid-template-columns:minmax(130px,.35fr) 1fr;gap:25px;padding:19px 24px;border-bottom:1px solid #dbe1e3}
.metadata-grid dl div:last-child{border-bottom:0}
.metadata-grid dt{font-size:11px;text-transform:uppercase;letter-spacing:.13em;font-weight:800;color:#0877e5}
.metadata-grid dd{margin:0;font-size:14px;font-weight:600;color:#1d282d}
.metadata-grid a{text-decoration:underline;text-decoration-color:#8cc5fc;text-underline-offset:3px}
.metadata-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:25px}
.metadata-tags span{padding:9px 12px;background:#e9eef0;border:1px solid #d4dcdf;font-size:11px;text-transform:uppercase;letter-spacing:.09em;font-weight:700;color:#334047}
.summary-section{background:var(--charcoal)}
.summary-heading{max-width:980px;margin-bottom:54px}
.summary-heading h2{max-width:900px}
.summary-heading>p{color:#b8c3c8;font-size:17px;line-height:1.75;max-width:920px}
.chapter-accordion{border-top:1px solid var(--line)}
.chapter-accordion details{border-bottom:1px solid var(--line);background:#0d1215}
.chapter-accordion summary{display:grid;grid-template-columns:110px 1fr auto;align-items:center;gap:22px;cursor:pointer;padding:24px 28px;list-style:none}
.chapter-accordion summary::-webkit-details-marker,.faq-list summary::-webkit-details-marker{display:none}
.chapter-accordion summary:after{content:"+";font:700 25px var(--display);color:var(--green)}
.chapter-accordion details[open] summary:after{content:"−"}
.chapter-accordion summary span{font-size:11px;text-transform:uppercase;letter-spacing:.16em;color:var(--blue);font-weight:800}
.chapter-accordion summary strong{font:800 clamp(23px,3vw,36px)/1 var(--display);text-transform:uppercase}
.chapter-accordion details>div{padding:0 28px 30px 160px;color:#b2bec4;max-width:1120px}
.chapter-accordion details>div p{margin:0 0 16px;line-height:1.75}
.central-message{margin-top:60px;padding:clamp(32px,5vw,62px);border:1px solid #2b3c45;background:linear-gradient(135deg,#0b1820,#0d1114);position:relative}
.central-message:before{content:"";position:absolute;left:0;top:0;width:4px;height:100%;background:linear-gradient(var(--green),var(--blue))}
.central-message p{font-size:17px;line-height:1.75;color:#c3cdd1;max-width:1000px}
.central-message small{display:block;margin-top:26px;color:#7f8d93;max-width:900px}
.faq-section{background:#070b0e}
.faq-layout{grid-template-columns:.62fr 1.38fr}
.faq-list{border-top:1px solid var(--line)}
.faq-list details{border-bottom:1px solid var(--line)}
.faq-list summary{cursor:pointer;list-style:none;padding:25px 52px 25px 0;position:relative;font:800 clamp(20px,2.4vw,29px)/1.1 var(--display);text-transform:uppercase}
.faq-list summary:after{content:"+";position:absolute;right:4px;color:var(--green)}
.faq-list details[open] summary:after{content:"−"}
.faq-list p{color:#aeb9be;max-width:760px;margin:0;padding:0 45px 25px 0}
.author-section{padding-top:20px;padding-bottom:clamp(54px,7vw,90px)}
.author-card{display:grid;grid-template-columns:minmax(260px,.78fr) 1.22fr;gap:0;align-items:stretch;max-width:1100px;margin:auto;padding:0;border:1px solid var(--line);background:var(--panel);overflow:hidden}
.author-portrait{position:relative;min-height:390px;margin:0;border-right:1px solid var(--line);background:#050709;overflow:hidden}
.author-portrait:before{content:"";position:absolute;inset:0;z-index:1;pointer-events:none;background:linear-gradient(140deg,rgba(var(--portrait-tint-a),.72),transparent 48%),linear-gradient(320deg,rgba(var(--portrait-tint-b),.68),transparent 57%);mix-blend-mode:screen;opacity:.52}
.author-portrait:after{content:"";position:absolute;inset:0;z-index:2;pointer-events:none;background:linear-gradient(180deg,transparent 55%,rgba(5,7,9,.3));box-shadow:inset 0 0 0 1px rgba(var(--portrait-tint-a),.22),inset 0 -80px 90px rgba(5,7,9,.3)}
.author-portrait img{width:100%;height:100%;object-fit:cover;object-position:center 35%;filter:grayscale(.58) saturate(.72) contrast(1.08)}
.author-copy{align-self:center;padding:clamp(34px,5vw,68px)}
.author-card h2{font-size:clamp(42px,6vw,76px);margin:10px 0 18px}
.author-card p{color:#aeb9be;max-width:680px}
.sticky-buy{position:fixed;z-index:40;left:0;right:0;bottom:0;min-height:74px;padding:10px clamp(18px,5vw,70px);display:flex;align-items:center;justify-content:space-between;gap:20px;background:rgba(7,9,11,.96);border-top:1px solid #2c3f48;box-shadow:0 -14px 45px rgba(0,0,0,.38);backdrop-filter:blur(18px)}
.sticky-buy div{display:grid}
.sticky-buy strong{font:800 19px var(--display);text-transform:uppercase}
.sticky-buy span{color:#7f8c92;font-size:10px;text-transform:uppercase;letter-spacing:.12em}
.sticky-buy a{background:var(--green);color:#060809;padding:13px 20px;font-size:11px;font-weight:900;text-transform:uppercase;letter-spacing:.12em}
.sticky-buy a:hover{background:#d5ff7f}
@media(max-width:1000px){.install-grid{grid-template-columns:repeat(2,1fr)}
.audience-grid{grid-template-columns:repeat(2,1fr)}
.metadata-head{grid-template-columns:1fr;gap:20px}
.metadata-grid{grid-template-columns:1fr}
.page-jump{justify-content:flex-start}
.chapter-accordion details>div{padding-left:28px}
.hybrid-book-page{padding-bottom:70px}
}
@media(max-width:700px){.electric-list,.install-grid,.audience-grid{grid-template-columns:1fr}
.metadata-grid dl div{grid-template-columns:1fr;gap:4px}
.chapter-accordion summary{grid-template-columns:74px 1fr auto;padding:20px 16px;gap:10px}
.chapter-accordion details>div{padding:0 16px 24px}
.author-card{grid-template-columns:1fr;padding:0}
.author-portrait{min-height:0;aspect-ratio:1/1;border-right:0;border-bottom:1px solid var(--line)}
.author-copy{padding:30px 26px 34px}
.sticky-buy strong{font-size:16px}
.sticky-buy span{display:none}
.sticky-buy a{padding:12px 14px}
.format-row{grid-template-columns:1fr 1fr}
.format-row .button{width:auto}
.page-jump span{display:none}
.sticky-buy{display:none}
.hybrid-book-page{padding-bottom:0}
}
@media(max-width:420px){.format-row{grid-template-columns:1fr}
.format-row .button{width:100%}
}

/* Blue belongs exclusively to The Discipline Switch. All sibling book pages
   inherit their secondary details and effects from their own page palette. */
:is(.architecture-page,.system-page,.tales-page) .shift .section-kicker,
:is(.architecture-page,.system-page,.tales-page) .shift-quote em,
:is(.architecture-page,.system-page,.tales-page) .framework-list article>span,
:is(.architecture-page,.system-page,.tales-page) .metadata-grid dt{color:var(--blue)}
:is(.architecture-page,.system-page,.tales-page) .metadata-grid a{text-decoration-color:var(--blue)}
:is(.architecture-page,.system-page,.tales-page) .button.secondary:hover{border-color:var(--blue);box-shadow:none}
:is(.architecture-page,.system-page,.tales-page) .book-visual:before{display:none}
:is(.architecture-page,.system-page,.tales-page) .final-cta:before{background:radial-gradient(circle,color-mix(in srgb,var(--green) 14%,transparent),transparent 67%)}
:is(.architecture-page,.system-page,.tales-page) .central-message{border-color:var(--line);background:linear-gradient(135deg,color-mix(in srgb,var(--green) 9%,#0b0d0f),#0d1114)}
:is(.architecture-page,.system-page,.tales-page) .author-portrait:before{background:radial-gradient(circle at 18% 18%,rgba(var(--portrait-tint-a),.92),transparent 46%),radial-gradient(circle at 88% 72%,rgba(var(--portrait-tint-b),.78),transparent 52%),linear-gradient(138deg,rgba(var(--portrait-tint-a),.34),transparent 50%,rgba(var(--portrait-tint-b),.28));mix-blend-mode:color;opacity:.92}
:is(.architecture-page,.system-page,.tales-page) .author-portrait:after{background:linear-gradient(90deg,rgba(3,5,7,.48),transparent 42%,rgba(var(--portrait-tint-b),.2)),linear-gradient(180deg,transparent 48%,rgba(5,7,9,.58));box-shadow:inset 0 0 0 1px rgba(var(--portrait-tint-a),.28),inset 0 -90px 110px rgba(5,7,9,.42)}
:is(.architecture-page,.system-page,.tales-page) .author-portrait img{filter:grayscale(1) contrast(1.16) brightness(.88)}