@font-face{font-family:Archivo;src:url('/assets/archivo-regular.ttf') format('truetype');font-weight:400;font-display:swap}@font-face{font-family:Archivo;src:url('/assets/archivo-semibold.ttf') format('truetype');font-weight:600;font-display:swap}@font-face{font-family:Archivo;src:url('/assets/archivo-extrabold.ttf') format('truetype');font-weight:800;font-display:swap}@font-face{font-family:'Source Serif';src:url('/assets/source-serif.ttf') format('truetype');font-weight:400;font-display:swap}
:root{--ink:#111212;--paper:#f2f2f0;--white:#fff;--gold:#c4a16b;--gold-hover:#d5b783;--bronze:#765a31;--muted:#626360;--line:#d5d5d0;--ease:cubic-bezier(.23,1,.32,1);font-family:Archivo,Arial,sans-serif;color:var(--ink);background:var(--ink);font-synthesis:none;scroll-behavior:smooth;scroll-padding-top:96px}*{box-sizing:border-box}body{margin:0}h1,h2,h3,p,figure{margin:0}a{color:inherit;text-underline-offset:5px}button{font:inherit;color:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button[disabled]{cursor:default}img{display:block;max-width:100%;height:auto}svg{flex:none;width:23px;height:23px}a:focus-visible,button:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--gold);outline-offset:6px}::selection{background:var(--gold);color:var(--ink)}[hidden]{display:none!important}.serif{font-family:'Source 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p{font-size:23px;margin-top:25px;margin-bottom:30px}
@media(min-width:1600px){.hero-scene img{object-position:center 80%}}
@media(max-width:1100px){.wordmark{gap:12px}.wordmark>span:first-child{font-size:28px}.wordmark>span:last-child{font-size:9px}.site-header nav{gap:20px}.hero{min-height:570px}.hero-inner{min-height:570px;padding-top:45px}.hero-book{right:6%;bottom:66px;width:21%}.hero-description{font-size:23px}.method-intro{gap:30px;grid-template-columns:1.5fr 1fr}.worksheet-link{padding:21px 18px;gap:14px}.author-grid{grid-template-columns:180px 1fr 1fr;gap:25px}.author-photo{width:180px;height:240px}.author-copy h2{font-size:29px}.author-copy .serif{font-size:16px}.endorsement{padding-left:25px}.endorsement blockquote{font-size:24px}.resource-grid{gap:45px}.resource-close h2{font-size:34px}.challenge-layout{grid-template-columns:minmax(0,1fr) 275px;gap:25px}.buy-layout{gap:50px}.buy-copy h1{font-size:42px}.door{padding-inline:13px}.door-summary{font-size:15px}}
@media(max-width:850px){.header-inner{min-height:76px}.site-header .wordmark{flex-direction:column;align-items:flex-start;gap:5px}.site-header .wordmark>span:last-child{font-size:8px;letter-spacing:.07em}.site-header nav{gap:16px}.site-header nav a{font-size:12px}.site-header nav a.nav-buy{padding:12px 17px}.hero h1{font-size:clamp(58px,8vw,68px)}.hero-copy{width:72%}.hero-inner{padding-top:40px;min-height:600px}.hero-book{width:22%;right:7%;bottom:52px}.book-title p:first-child{font-size:16px}.book-title p+p{font-size:16px}.hero-description{font-size:22px}.hero-actions{max-width:460px;gap:10px}.hero-actions .button{font-size:12px;padding-inline:18px;gap:12px}.method-intro{grid-template-columns:1fr}.worksheet-link{max-width:400px}.doors{margin-top:30px}.door-name{font-size:22px}.door-summary{font-size:14px}.door-panel{gap:30px}.author-grid{grid-template-columns:160px 1fr;gap:25px}.author-photo{width:160px;height:205px}.endorsement{grid-column:1/-1;border-left:0;border-top:1px solid var(--line);padding:25px 0 0;display:flex;gap:40px;align-items:center}.endorsement blockquote{max-width:440px;font-size:26px}.endorsement figcaption{margin-top:0;min-width:170px}.resource-grid{grid-template-columns:1fr;gap:30px}.resource-links{max-width:650px}.resource-links a:first-child{padding-top:20px;border-top:1px solid #4a4a43}.challenge-layout{grid-template-columns:1fr}.playlist{max-width:none}.playlist ol{display:grid;grid-template-columns:1fr 1fr}.playlist li:last-child{grid-column:1/-1}.playlist>p br{display:none}.buy-layout{gap:35px;grid-template-columns:.8fr 1.2fr}.buy-copy h1{font-size:36px}.buy-book{padding-inline:20px}.buy-book p{font-size:14px}.footer-top{align-items:flex-start}.site-footer .wordmark{flex-direction:column;gap:6px;align-items:flex-start}.footer-bottom{font-size:9px}}
@media(max-width:640px){:root{scroll-padding-top:80px}.section-inner,.header-inner,.hero-inner{padding-inline:24px}.section-pad{padding-block:42px}.header-inner{min-height:76px}.site-header{position:relative}.site-header .wordmark{flex-direction:row;align-items:center;gap:10px}.site-header .wordmark>span:first-child{font-size:27px}.site-header .wordmark>span:last-child{font-size:8px;max-width:75px;line-height:1.6;white-space:normal}.menu-toggle:not([hidden]){display:inline-flex;font-size:12px}.js-menu #navigation{display:none;position:absolute;left:0;right:0;top:76px;background:#171817;padding:20px 24px 25px;box-shadow:0 16px 22px #0004;border-top:1px solid #45443d}.js-menu #navigation[data-open]{display:flex;flex-direction:column;align-items:stretch;gap:0}.js-menu #navigation a{font-size:16px;padding:15px 4px}.js-menu #navigation a.nav-buy{text-align:center;margin-top:10px;padding:14px}.menu-toggle[aria-expanded=true] .menu-lines{border:0}.menu-toggle[aria-expanded=true] .menu-lines:before,.menu-toggle[aria-expanded=true] .menu-lines:after{content:'';position:absolute;inset:5px 0 auto;height:1px;background:currentColor;transform:rotate(45deg)}.menu-toggle[aria-expanded=true] .menu-lines:after{transform:rotate(-45deg)}body:not(.js-menu) .header-inner{flex-wrap:wrap;padding-block:16px}body:not(.js-menu) #navigation{display:flex;flex-wrap:wrap;gap:10px 18px}body:not(.js-menu) #navigation a{font-size:12px}.hero{min-height:0}.hero-inner{min-height:720px;padding-top:25px;padding-bottom:30px;display:grid;grid-template-columns:1fr}.hero-copy{width:100%;display:contents}.hero h1{font-size:clamp(47px,11.4vw,70px);line-height:1.01;letter-spacing:-.04em;position:relative;z-index:2;grid-row:1}.book-title{grid-row:2;margin-top:20px;position:relative;z-index:2}.book-title p:first-child{font-size:13px;letter-spacing:.13em}.book-title p+p{font-size:13px;margin-top:7px}.hero-description{grid-row:3;font-size:19px;line-height:1.4;max-width:230px;margin-top:20px;z-index:2;align-self:start}.hero-book{position:relative;grid-row:4;width:143px;right:auto;bottom:auto;justify-self:end;margin-top:-48px;margin-right:4px;align-self:end;z-index:1}.hero-actions{grid-row:5;position:relative;z-index:2;margin-top:29px;display:grid;grid-template-columns:1fr;width:100%;max-width:none;gap:10px}.hero-actions .button{font-size:14px;min-height:50px;gap:22px}.hero-actions .button-outline{background:#111212b8}.hero-scene img{object-position:54% bottom;object-fit:cover}.hero-shade{background:linear-gradient(180deg,#111212 0%,rgba(17,18,18,.87) 35%,rgba(17,18,18,.08) 73%,#111212 100%),linear-gradient(90deg,#11121290,transparent 85%)}h2{font-size:35px;line-height:1.08}.method-intro{gap:23px}.intro-copy{font-size:18px;line-height:1.5;margin-top:15px}.worksheet-link{padding:18px;min-height:88px;max-width:none;width:100%;gap:15px}.worksheet-link strong{font-size:14px}.worksheet-link span span{font-size:12px}.worksheet-link>svg:first-child{width:26px}.doors{grid-template-columns:repeat(5, minmax(0,1fr));margin-top:27px}.door{padding:11px 2px 13px;text-align:center;display:flex;align-items:center;flex-direction:column;border-left:0}.door-number{width:30px;height:30px;font-size:11px;margin-bottom:9px}.door-name{font-family:Archivo,Arial,sans-serif;font-size:11px;font-weight:600;letter-spacing:-.025em}.door-summary{display:none}.door-panel{grid-template-columns:1fr;gap:19px;padding-top:22px;min-height:0}.door-panel h3{font-size:17px}.door-panel p:not(.reflection){font-size:14px;line-height:1.6}.reflection{padding:15px 0 0;border-left:0;border-top:1px solid var(--line)}.reflection span:first-child{font-size:11px}.reflection span:last-child{font-size:20px}.author-grid{grid-template-columns:95px minmax(0,1fr);gap:20px}.author-photo{width:95px;height:128px;object-position:46% 50%;align-self:start}.author-copy h2{font-size:28px}.author-copy>p:first-of-type{font-size:11px;line-height:1.5;margin-top:8px}.author-copy .serif{font-size:16px;line-height:1.5;margin-top:14px}.author-copy .text-link{font-size:12px;gap:5px;margin-top:8px}.endorsement{display:block;padding-top:25px;margin-top:6px}.endorsement blockquote{font-size:28px;max-width:400px}.endorsement figcaption{margin-top:18px}.resource-grid{gap:28px}.resource-close h2{font-size:33px;max-width:300px}.resource-close .serif{font-size:19px;line-height:1.5;max-width:270px}.resource-links strong{font-size:16px}.resource-links span span{font-size:12px;line-height:1.5}.resource-links a{gap:22px;padding-block:22px}.site-footer{padding:30px 24px 24px}.footer-top{display:block}.site-footer .wordmark{flex-direction:row;align-items:center;gap:12px}.footer-links{flex-wrap:wrap;gap:4px 21px;margin-top:17px;font-size:11px}.footer-bottom{display:block;font-size:10px;margin-top:10px}.footer-bottom p+p{margin-top:5px}.inner-main{padding:15px 0 40px}.back-link{margin-bottom:18px}.inner-heading h1{font-size:35px;line-height:1.08}.inner-heading .serif{font-size:17px;line-height:1.55}.inner-heading .serif br{display:none}.challenge-layout{margin-top:27px;gap:26px}.video-stage{aspect-ratio:16/10}.video-placeholder{padding:15px}.play-symbol{width:43px;height:43px;margin-bottom:10px}.video-play{padding:11px 17px;font-size:13px;min-height:44px}.video-placeholder p{font-size:10px;margin-top:12px;max-width:220px;line-height:1.5}.video-caption{align-items:flex-start;flex-direction:column;gap:4px;margin-top:18px}.video-caption h2{font-size:25px}.video-caption .text-link{min-height:38px}.video-status{margin-top:5px}.challenge-tool{gap:16px}.challenge-tool h3{font-size:17px}.challenge-tool p{font-size:13px}.challenge-tool>svg{width:25px}.playlist ol{grid-template-columns:1fr}.playlist li:last-child{grid-column:auto}.playlist li a{min-height:53px}.playlist>p br{display:block}.buy-main{padding:15px 0 40px}.buy-layout{display:flex;flex-direction:column;gap:29px}.buy-book{width:100%;padding:22px;flex-direction:row;justify-content:center;gap:25px}.buy-book img{width:110px}.buy-book p{font-size:17px;max-width:130px;margin-top:0;line-height:1.4}.buy-copy{width:100%}.buy-copy h1{font-size:39px}.buy-copy>.serif{font-size:21px;margin-top:17px}.retailer{padding-block:18px}.retailer-note{font-size:12px}.bulk-note{font-size:13px}.missing{padding-block:65px}.missing h1{font-size:45px}.missing p{font-size:20px}}
@media(max-width:360px){.section-inner,.header-inner,.hero-inner{padding-inline:20px}.hero h1{font-size:44px}.hero-description{font-size:18px;max-width:180px}.hero-book{width:123px;margin-top:-22px}.hero-inner{min-height:700px}.door-name{font-size:10px}.author-grid{grid-template-columns:80px 1fr;gap:15px}.author-photo{width:80px;height:120px}.author-copy h2{font-size:25px}.inner-heading h1{font-size:30px}.footer-links{gap:5px 15px}}
@media(prefers-reduced-motion:reduce){:root{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}.button:active{transform:none}}
/* The supplied cover contains its own transparent edge. Avoid a detached false spine. */
.book-object:after{display:none}
/* Final legibility pass: preserve the small wordmark lockup without microtext. */
.wordmark>span:last-child,.site-footer .wordmark>span:last-child{font-size:11px}
.footer-bottom{font-size:10px}
.playlist a[aria-current=true] .episode-number{color:#635c4c}
@media(max-width:850px){.site-header .wordmark>span:last-child{font-size:11px}}
@media(max-width:640px){.header-inner{gap:12px}.site-header .wordmark>span:last-child{font-size:11px;max-width:80px;letter-spacing:.03em;line-height:1.3}.video-placeholder p{font-size:11px}.door-name{font-size:11px}.site-footer .wordmark>span:last-child{font-size:11px}}
/* Dark focus indicators retain contrast on the light content surfaces. */
.method :focus-visible,.author-section :focus-visible,.inner-main :focus-visible,.buy-main :focus-visible,.missing :focus-visible{outline-color:var(--bronze)}
.inner-main .video-play:focus-visible{outline-color:#fff}

/* Particle sand, with no image warping. Six faces give the book real depth. */
.sand-motion{position:absolute;inset:0;width:100%;height:100%;z-index:-2;pointer-events:none;opacity:0}
.sand-ready .sand-motion{opacity:1}
.hero-book{--book-depth:clamp(18px,2.15vw,30px);perspective:1100px;perspective-origin:50% 40%}
.book-pose{position:relative;transform-style:preserve-3d;transition:transform 220ms cubic-bezier(.23,1,.32,1)}
.hero-book .book-object{width:100%;aspect-ratio:338/505;position:relative;transform-style:preserve-3d;transform-origin:50% 50%;filter:none;transform:rotateX(6deg) rotateY(25deg) rotateZ(-1deg);animation:book-turntable 16s cubic-bezier(.77,0,.175,1) infinite;animation-play-state:paused}
.book-face{position:absolute;inset:0;backface-visibility:hidden;background:#e5e8e6;border-radius:1px}
.book-front{transform:translateZ(calc(var(--book-depth)/2));overflow:hidden;box-shadow:inset 0 0 0 1px #fff6}
.book-front img{position:absolute;max-width:none;width:110.059%;height:106.733%;left:-2.959%;top:-1.98%}
.book-front:after{content:'';position:absolute;inset:0;pointer-events:none;background:linear-gradient(90deg,#33444c55,transparent 3%,#fff5 4%,transparent 7%,transparent 97%,#0002)}
.book-back{transform:rotateY(180deg) translateZ(calc(var(--book-depth)/2));background:linear-gradient(90deg,#c1cbd0,#e2e6e7 16%,#a2b0b8)}
.book-spine{position:absolute;left:0;top:0;width:var(--book-depth);height:100%;transform-origin:0 50%;transform:translateZ(calc(var(--book-depth)/-2)) rotateY(-90deg);background:linear-gradient(90deg,#8f9fa7,#d4dde0 28%,#f1f2ee 75%,#9baeb5);border-radius:2px;display:flex;align-items:center;flex-direction:column;justify-content:space-between;padding:20px 0 15px;box-shadow:inset 0 0 0 1px #27373c33}
.book-spine span,.book-spine small{writing-mode:vertical-rl;text-orientation:mixed;color:#2c414b;white-space:nowrap;font-family:Archivo,Arial,sans-serif;font-weight:600;font-size:clamp(6px,.68vw,9px);letter-spacing:.06em}
.book-spine small{font-size:clamp(4px,.46vw,6px);letter-spacing:.04em}
.book-pages{position:absolute;backface-visibility:visible;background-color:#e2ddd0;border:1px solid #b9b4a7}
.book-pages-side{width:calc(var(--book-depth) - 3px);height:calc(100% - 4px);top:2px;left:100%;transform-origin:0 50%;transform:translateZ(calc(var(--book-depth)/2 - 1.5px)) rotateY(90deg);background-image:repeating-linear-gradient(90deg,#eee9de 0,#eee9de 1px,#c7c1b4 1px,#c7c1b4 2px)}
.book-pages-top,.book-pages-bottom{width:calc(100% - 2px);height:calc(var(--book-depth) - 3px);left:1px;transform-origin:50% 0;transform:translateZ(calc(var(--book-depth)/-2 + 1.5px)) rotateX(90deg);background-image:repeating-linear-gradient(0deg,#ece7dc 0,#ece7dc 1px,#bdb7ac 1px,#bdb7ac 2px)}
.book-pages-top{top:1px}.book-pages-bottom{top:calc(100% - 1px)}
.cover-sheen{position:absolute;inset:-20%;pointer-events:none;background:linear-gradient(110deg,transparent 35%,#fff4 48%,transparent 63%);transform:translateX(-110%);animation:cover-light 16s linear infinite;animation-play-state:paused}
.book-shadow{position:absolute;left:-10%;width:120%;height:36px;bottom:-21px;background:radial-gradient(ellipse,#0009,transparent 65%);transform:scaleX(.92);animation:book-shadow 16s cubic-bezier(.77,0,.175,1) infinite;animation-play-state:paused;pointer-events:none}
.hero.motion-running .book-object,.hero.motion-running .cover-sheen,.hero.motion-running .book-shadow{animation-play-state:running}
.motion-toggle{position:absolute;right:clamp(24px,5.5vw,80px);bottom:12px;z-index:3;display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:8px 12px;border:1px solid #c4a16b55;border-radius:24px;background:#111212c9;color:#ded6c5;font-size:11px;line-height:1.2;cursor:pointer;transition:background-color 180ms ease,border-color 180ms ease}
.motion-toggle[hidden]{display:none}
.motion-toggle-icon{font-size:15px;width:14px;text-align:center}
@media(hover:hover) and (pointer:fine){.motion-toggle:hover{background:#29271f;border-color:#c4a16b}}
@keyframes book-turntable{
  0%,100%{transform:translateY(0) rotateX(6deg) rotateY(25deg) rotateZ(-1deg)}
  50%{transform:translateY(-11px) rotateX(-3deg) rotateY(-24deg) rotateZ(1deg)}
}
@keyframes cover-light{
  0%,15%{transform:translateX(-110%);opacity:0}
  22%{opacity:.5}
  50%{transform:translateX(110%);opacity:0}
  100%{transform:translateX(110%);opacity:0}
}
@keyframes book-shadow{0%,100%{transform:scaleX(.92);opacity:.75}50%{transform:scaleX(1.08);opacity:.4}}
@media(max-width:640px){.hero-inner{padding-bottom:83px}.motion-toggle{right:24px;bottom:15px}.hero-book{--book-depth:18px;perspective:800px}.book-spine{padding:10px 0}.book-shadow{height:22px;bottom:-14px}}
@media(prefers-reduced-motion:reduce){.hero-book .book-object{transform:rotateX(6deg) rotateY(25deg) rotateZ(-1deg)}.cover-sheen,.motion-toggle{display:none}}

@media(min-width:641px){.hero-book{bottom:84px}}