/* Before Sermorelin — a loose button, an open square, time to check the thread. */
:root{--b4s-ground:#EBF8E4;--b4s-ink:#2A2F20;--b4s-leaf:#567128;--b4s-blue:#C6E3EB;--b4s-surface:#FBFCFA;--b4s-max:1280px}
*{box-sizing:border-box}
html{scroll-behavior:auto;scroll-padding-top:32px}
body{margin:0;background:var(--b4s-surface);color:var(--b4s-ink);font-family:'Sarabun',Arial,sans-serif;font-size:19px;line-height:1.7;-webkit-font-smoothing:antialiased}
::selection{background:var(--b4s-blue);color:var(--b4s-ink)}
a{color:inherit;text-decoration-thickness:1px;text-underline-offset:5px}
a:hover{text-decoration-thickness:2px;color:var(--b4s-leaf)}
a:focus-visible{outline:3px solid var(--b4s-leaf);outline-offset:5px;background:var(--b4s-surface);text-decoration-thickness:2px}
img{max-width:100%;display:block;color:var(--b4s-ink);font:16px/1.5 'Sarabun',Arial,sans-serif}
p{margin:0 0 1.2em}
h1,h2,h3{font-family:'Kreon',Georgia,serif;font-weight:500;line-height:1.1;margin:0;text-wrap:balance}
h1{font-size:clamp(46px,4.7vw,68px);letter-spacing:-.035em}
h2{font-size:clamp(34px,3.4vw,48px);letter-spacing:-.025em;margin:0 0 28px}
h3{font-size:27px;line-height:1.25}
.b4s-icon{width:22px;height:22px;flex:0 0 auto;vertical-align:middle;stroke-width:1.65}
.b4s-skip{position:absolute;top:8px;left:20px;transform:translateY(-180%);z-index:10;background:var(--b4s-surface);padding:8px 16px}
.b4s-skip:focus{transform:none}
/* Three descending steps, each attached with a short run of stitches. */
.b4s-stair{max-width:var(--b4s-max);margin:0 auto;display:grid;grid-template-columns:1.15fr .85fr 1fr 1.35fr;grid-template-rows:repeat(3,28px);column-gap:32px;padding:22px 0 20px;min-height:126px;background:var(--b4s-surface)}
.b4s-wordmark{position:relative;grid-column:1;grid-row:1/4;align-self:start;padding:1px 0 0 34px;font-family:'Kreon',Georgia,serif;font-size:38px;line-height:1.02;text-decoration:none;font-weight:500;justify-self:start}
.b4s-wordmark span{display:block}
.b4s-wordmark span:first-child{font-size:25px;line-height:1.18}
.b4s-wordmark::before{content:'';position:absolute;left:0;top:8px;width:21px;height:21px;border:2px solid var(--b4s-leaf)}
.b4s-wordmark::after{content:'';position:absolute;left:10px;top:36px;height:30px;width:2px;background:repeating-linear-gradient(to bottom,var(--b4s-leaf) 0 4px,transparent 4px 10px)}
.b4s-step{display:flex;align-items:center;gap:10px;align-self:start;justify-self:start;min-height:34px;padding:0 0 8px;font-size:17px;line-height:1.35;text-decoration:none;border-bottom:2px dashed var(--b4s-leaf);transition:transform .18s ease,color .18s ease}
.b4s-step b{font:500 24px/1 'Kreon',Georgia,serif;color:var(--b4s-leaf)}
.b4s-step .b4s-icon{width:19px;height:19px;color:var(--b4s-leaf)}
.b4s-step:nth-of-type(2){grid-column:2;grid-row:1}
.b4s-step:nth-of-type(3){grid-column:3;grid-row:2}
.b4s-step:nth-of-type(4){grid-column:4;grid-row:3}
.b4s-step:hover{transform:translateY(-3px)}
.b4s-step[aria-current=page]{border-bottom-style:solid;border-bottom-width:3px}
.b4s-main{margin:0;min-width:0}
/* The photograph fills the hero. The entire reading surface is opaque. */
.b4s-hero{position:relative;isolation:isolate;min-height:726px;padding:40px max(40px,calc((100% - var(--b4s-max))/2)) 52px;display:flex;align-items:center;background:var(--b4s-blue)}
.b4s-hero-panel{position:relative;z-index:1;width:640px;padding:34px 40px 32px;background:var(--b4s-ground);box-shadow:14px 14px 0 var(--b4s-blue)}
.b4s-hero-panel::before{content:'';position:absolute;top:20px;bottom:20px;left:15px;width:2px;background:repeating-linear-gradient(to bottom,var(--b4s-leaf) 0 8px,transparent 8px 23px);pointer-events:none}
.b4s-hero h1{font-size:64px;line-height:1.03;max-width:560px}
.b4s-opening{font-size:19px;line-height:1.5;margin:18px 0 22px;max-width:58ch}
.b4s-summary{list-style:none;counter-reset:checks;margin:0 0 22px;padding:0;font-size:16px;line-height:1.5}
.b4s-summary li{counter-increment:checks;display:flex;align-items:center;gap:11px;margin-top:7px}
.b4s-summary .b4s-icon{color:var(--b4s-leaf);width:19px;height:19px}
.b4s-seam{position:relative;margin:0;padding:22px 0 0 20px;border-left:3px dotted var(--b4s-leaf);cursor:default}
.b4s-seam::before{content:'';position:absolute;top:0;left:19px;width:44px;height:9px;background:var(--b4s-leaf)}
.b4s-seam p{font-size:16px;line-height:1.5;margin:0;max-width:none}
.b4s-hero-media{position:absolute;inset:0;margin:0;z-index:0}
.b4s-hero-media img{height:100%;width:100%;object-fit:cover;object-position:60% 54%}
.b4s-hero-media figcaption,.b4s-guide-photo figcaption{position:absolute;right:32px;bottom:24px;max-width:300px;padding:12px 16px;background:var(--b4s-surface);color:var(--b4s-ink);box-shadow:6px 6px 0 var(--b4s-blue);font-size:16px;line-height:1.45}
/* One thread, with open squares that stay alongside the question being read. */
.b4s-reading-body{max-width:1232px;margin:0 auto;padding:92px 24px 110px}
.b4s-thread{position:relative;list-style:none;margin:0;padding:0;min-width:0}
.b4s-thread::before{content:'';position:absolute;left:49px;top:20px;bottom:64px;width:2px;background:repeating-linear-gradient(to bottom,var(--b4s-leaf) 0 11px,transparent 11px 31px)}
.b4s-entry{position:relative;display:grid;grid-template-columns:100px minmax(0,1fr);gap:48px;padding-bottom:104px;align-items:start}
.b4s-entry:last-child{padding-bottom:0}
.b4s-empty{position:sticky;top:32px;align-self:start;display:block;width:100px;height:100px;border:3px solid var(--b4s-leaf);background:var(--b4s-surface);margin-top:10px;box-shadow:8px 8px 0 var(--b4s-blue)}
.b4s-home-weave .b4s-entry:first-child .b4s-empty{width:124px;height:124px;margin-left:-12px;border-width:4px}
.b4s-copy{display:grid;grid-template-columns:minmax(0,1fr) 244px;column-gap:50px;min-width:0;align-content:start}
.b4s-copy>p{grid-column:1;min-width:0}
.b4s-copy>h2{grid-column:1/-1;max-width:850px}
.b4s-check-no{display:flex;align-items:baseline;gap:10px;font-size:16px;font-weight:600;color:var(--b4s-leaf);margin:0 0 12px;line-height:1.2}
.b4s-check-no span{font:500 54px/.95 'Kreon',Georgia,serif;letter-spacing:-.04em}
.b4s-copy p:last-child{margin-bottom:0}
.b4s-reading{position:sticky;top:34px;grid-column:2;grid-row:3/span 3;align-self:start;padding:26px 22px 24px;margin:8px -12px 0 0;background:var(--b4s-blue);box-shadow:7px 7px 0 var(--b4s-ground);transform:rotate(1.4deg);font-size:17px;line-height:1.5}
.b4s-reading::before{content:'';position:absolute;top:-10px;left:26px;width:44px;height:17px;background:var(--b4s-leaf)}
.b4s-reading>.b4s-icon{display:block;width:26px;height:26px;margin-bottom:15px}
.b4s-reading>span{display:block;font-weight:600;margin-bottom:8px}
.b4s-reading a{display:block}
.b4s-reading a:hover{color:var(--b4s-ink);text-decoration-thickness:2px}
.b4s-entry:nth-child(even) .b4s-reading{transform:rotate(-1.4deg)}
.b4s-copy>.b4s-pause{position:relative;font:400 27px/1.4 'Kreon',Georgia,serif;margin:12px 0 30px -24px;padding:24px 20px 24px 24px;border-left:6px solid var(--b4s-leaf);background:var(--b4s-ground);box-shadow:8px 8px 0 var(--b4s-blue)}
.b4s-photo{grid-column:1/-1;margin:32px -18px 24px 22px;box-shadow:12px 12px 0 var(--b4s-blue)}
.b4s-photo img{width:100%;height:auto;aspect-ratio:1160/680;object-fit:cover}
.b4s-photo figcaption{font-size:16px;line-height:1.5;padding:12px 16px;background:var(--b4s-ground)}
/* Smaller photo bands carry the same domestic world into each guide. */
.b4s-guide-head{position:relative;background:var(--b4s-ground)}
.b4s-guide-heading{padding:48px max(40px,calc((100vw - var(--b4s-max))/2)) 54px}
.b4s-guide-head:not(.b4s-guide-head-photo) .b4s-guide-heading{max-width:1440px;margin:0 auto;padding-right:250px}
.b4s-guide-head:not(.b4s-guide-head-photo)::after{content:'';position:absolute;right:max(60px,calc((100vw - var(--b4s-max))/2 + 24px));top:72px;width:112px;height:112px;border:3px solid var(--b4s-leaf);box-shadow:12px 12px 0 var(--b4s-blue)}
.b4s-route{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:16px;line-height:1.5;margin:0 0 24px}
.b4s-route>span:last-child{display:inline-flex;align-items:center;gap:8px;color:var(--b4s-leaf)}
.b4s-route .b4s-icon{width:19px;height:19px}
.b4s-guide-title{max-width:1000px}
.b4s-guide-opening{font-size:20px;line-height:1.55;margin:22px 0 0;max-width:760px}
.b4s-guide-head-photo{display:grid;grid-template-columns:1.16fr 1fr;min-height:430px}
.b4s-guide-head-photo .b4s-guide-heading{padding-right:50px;padding-left:max(40px,calc((100vw - var(--b4s-max))/2))}
.b4s-guide-head-photo h1{font-size:clamp(44px,4vw,60px)}
.b4s-guide-photo{position:relative;margin:0;min-width:0;min-height:430px}
.b4s-guide-photo img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:55% 52%}
.b4s-guide-photo figcaption{right:28px;bottom:28px;left:28px;margin:0}
.b4s-source{grid-column:1/-1;padding:28px 0;border-top:2px dashed var(--b4s-leaf);max-width:850px}
.b4s-source:last-child{padding-bottom:0}
.b4s-source h3{margin-bottom:15px}
.b4s-source p{font-size:18px;line-height:1.65;margin:0;max-width:68ch}
.b4s-page-about .b4s-copy,.b4s-page-contact .b4s-copy,.b4s-page-references .b4s-copy{display:block;max-width:850px}
.b4s-page-about .b4s-copy>p,.b4s-page-contact .b4s-copy>p{max-width:65ch}
/* The footer finishes the running thread with a blue fabric-sized field. */
.b4s-foot{position:relative;background:var(--b4s-blue);padding:58px max(40px,calc((100vw - var(--b4s-max))/2)) 34px}
.b4s-foot::before{content:'';position:absolute;top:15px;left:0;right:0;height:2px;background:repeating-linear-gradient(to right,var(--b4s-leaf) 0 11px,transparent 11px 31px)}
.b4s-foot-inner{max-width:var(--b4s-max);margin:0 auto}
.b4s-foot-name{font:500 clamp(36px,4vw,58px)/1.1 'Kreon',Georgia,serif;margin:0 0 28px;letter-spacing:-.025em}
.b4s-foot nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px 32px;max-width:1080px;font-size:17px;margin-bottom:34px}
.b4s-foot nav a{display:flex;align-items:center;gap:10px;min-height:38px;justify-self:start}
.b4s-foot nav a:hover{color:var(--b4s-ink)}
.b4s-foot p{max-width:760px;font-size:16px;line-height:1.6;margin-bottom:14px}
.b4s-foot small{font-size:16px}
.b4s-lost{max-width:var(--b4s-max);margin:auto;min-height:490px;padding:64px 40px}
.b4s-lost p{margin-top:28px;max-width:580px}
/* One motion moment: the whole hero slip settles by eight pixels, never hides. */
@keyframes b4s-settle{from{transform:translateY(-8px)}to{transform:translateY(0)}}
@media(prefers-reduced-motion:no-preference){.b4s-hero-panel{animation:b4s-settle .6s ease-out both}}
@media(max-width:1390px) and (min-width:761px){
 .b4s-stair{margin:0 40px;column-gap:20px;grid-template-columns:1.15fr .75fr 1fr 1.4fr}
 .b4s-step{font-size:16px;gap:8px}
 .b4s-wordmark{font-size:34px}
 .b4s-hero{min-height:714px}
 .b4s-hero-panel{width:600px;padding:32px 36px}
 .b4s-hero h1{font-size:60px}
 .b4s-reading-body{padding-left:40px;padding-right:40px}
 .b4s-entry{grid-template-columns:88px minmax(0,1fr);gap:38px}
 .b4s-empty{width:88px;height:88px}
 .b4s-home-weave .b4s-entry:first-child .b4s-empty{width:108px;height:108px;margin-left:-10px}
 .b4s-thread::before{left:43px}
 .b4s-copy{grid-template-columns:minmax(0,1fr) 218px;column-gap:34px}
 .b4s-reading{padding:24px 18px}
}
@media(max-width:1050px) and (min-width:761px){
 .b4s-stair{margin:0 24px;column-gap:14px;grid-template-columns:1fr .7fr 1fr 1.45fr}
 .b4s-wordmark{font-size:28px;padding-left:28px}
 .b4s-wordmark span:first-child{font-size:22px}
 .b4s-step{font-size:14px;gap:6px}
 .b4s-step .b4s-icon{width:16px;height:16px}
 .b4s-hero{padding-left:28px;padding-right:28px}
 .b4s-hero-panel{width:57%;min-width:465px}
 .b4s-hero h1{font-size:51px}
 .b4s-opening{font-size:18px}
 .b4s-hero-media figcaption{right:24px;max-width:210px}
 .b4s-reading-body{padding-left:32px;padding-right:32px}
 .b4s-copy{display:block;max-width:700px}
 .b4s-reading{position:relative;top:auto;max-width:360px;margin:36px 0 0 20px;padding:24px}
 .b4s-reading>.b4s-icon{float:left;margin:0 14px 10px 0}
 .b4s-copy>.b4s-pause{margin-left:0}
 .b4s-guide-head-photo{grid-template-columns:1.2fr 1fr;min-height:430px}
 .b4s-guide-head-photo .b4s-guide-heading{padding:36px 30px}
 .b4s-guide-head-photo h1{font-size:43px}
 .b4s-guide-opening{font-size:18px}
}
@media(max-width:760px){
 body{font-size:18px;line-height:1.65}
 .b4s-stair{height:80px;min-height:80px;margin:0 18px;padding:8px 0;grid-template-columns:140px minmax(0,1fr);grid-template-rows:repeat(3,21px);column-gap:7px}
 .b4s-wordmark{font-size:26px;line-height:1.02;padding:4px 0 0 21px;max-width:140px}
 .b4s-wordmark span:first-child{font-size:20px;line-height:1.2}
 .b4s-wordmark::before{top:8px;width:14px;height:14px}
 .b4s-wordmark::after{left:7px;top:28px;height:26px}
 .b4s-step{min-height:21px;font-size:13px;gap:6px;line-height:1.4;padding:0;border:0;white-space:nowrap}
 .b4s-step b{font:600 13px/1.4 'Sarabun',Arial,sans-serif}
 .b4s-step .b4s-icon{width:15px;height:15px}
 .b4s-step:nth-of-type(2){grid-column:2;grid-row:1;margin-left:0}
 .b4s-step:nth-of-type(3){grid-column:2;grid-row:2;margin-left:8px}
 .b4s-step:nth-of-type(4){grid-column:2;grid-row:3;margin-left:16px}
 .b4s-step[aria-current=page]{border:0;text-decoration:underline;text-underline-offset:3px}
 .b4s-step:hover{transform:none;text-decoration:underline}
 h1{font-size:36px;line-height:1.1;letter-spacing:-.025em;text-wrap:initial}
 h2{font-size:30px;line-height:1.16;margin-bottom:22px;text-wrap:initial}
 .b4s-hero{display:block;min-height:0;padding:0}
 .b4s-hero-panel{width:100%;padding:24px 22px 30px;box-shadow:none;animation:none}
 .b4s-hero-panel::before{left:8px;top:26px;bottom:30px;width:1px;background:repeating-linear-gradient(to bottom,var(--b4s-leaf) 0 6px,transparent 6px 20px)}
 .b4s-hero h1{font-size:36px;line-height:1.08;max-width:none}
 .b4s-opening{font-size:17px;line-height:1.5;margin:16px 0 22px}
 .b4s-summary{display:none}
 .b4s-seam{padding:22px 0 0 17px;margin:0}
 .b4s-seam::before{left:16px;width:40px;height:8px}
 .b4s-seam p{font-size:16px;line-height:1.5}
 .b4s-hero-media{position:relative;height:306px;inset:auto}
 .b4s-hero-media img{object-position:64% 54%}
 .b4s-hero-media figcaption{right:18px;bottom:22px;max-width:245px;padding:10px 13px;font-size:16px}
 .b4s-reading-body{padding:54px 22px 66px}
 .b4s-thread::before{left:23px;top:12px;bottom:36px;width:2px;background:repeating-linear-gradient(to bottom,var(--b4s-leaf) 0 9px,transparent 9px 27px)}
 .b4s-entry{grid-template-columns:48px minmax(0,1fr);column-gap:20px;padding-bottom:62px}
 .b4s-empty{position:relative;top:auto;width:48px;height:48px;border-width:2px;margin-top:4px;box-shadow:5px 5px 0 var(--b4s-blue)}
 .b4s-home-weave .b4s-entry:first-child .b4s-empty{width:60px;height:60px;margin-left:-6px;border-width:2px}
 .b4s-copy{display:block;max-width:none}
 .b4s-check-no{font-size:16px;gap:8px;margin-bottom:12px}
 .b4s-check-no span{font-size:42px}
 .b4s-reading{position:relative;top:auto;padding:22px 18px;margin:32px 4px 8px -8px;font-size:16px;line-height:1.5;transform:rotate(1deg)}
 .b4s-reading>.b4s-icon{width:24px;height:24px;margin-bottom:12px}
 .b4s-copy>.b4s-pause{font-size:25px;line-height:1.4;padding:20px 16px;margin:12px 0 28px -12px;border-left-width:4px;box-shadow:5px 5px 0 var(--b4s-blue)}
 .b4s-photo{margin:28px 0 24px -8px;box-shadow:6px 6px 0 var(--b4s-blue)}
 .b4s-guide-head-photo{display:block;min-height:0}
 .b4s-guide-heading,.b4s-guide-head-photo .b4s-guide-heading{padding:28px 22px 32px}
 .b4s-guide-head:not(.b4s-guide-head-photo) .b4s-guide-heading{padding:28px 22px 34px}
 .b4s-guide-head:not(.b4s-guide-head-photo)::after{display:none}
 .b4s-route{font-size:16px;gap:8px;margin-bottom:24px}
 .b4s-guide-head-photo h1{font-size:36px;line-height:1.1}
 .b4s-guide-opening{margin:18px 0 0;font-size:18px;line-height:1.5}
 .b4s-guide-photo{min-height:280px;height:280px}
 .b4s-guide-photo figcaption{bottom:22px;left:22px;right:22px;padding:10px 13px;max-width:275px}
 .b4s-source{padding:24px 0}
 .b4s-source h3{font-size:25px}
 .b4s-source p{font-size:17px;line-height:1.6}
 .b4s-foot{padding:45px 24px 28px}
 .b4s-foot-name{font-size:36px}
 .b4s-foot nav{grid-template-columns:1fr;gap:8px;font-size:17px;margin-bottom:28px}
 .b4s-foot nav a{min-height:44px}
 .b4s-lost{min-height:420px;padding:40px 22px}
}
@media(max-width:359px){.b4s-stair{margin:0 12px;grid-template-columns:125px minmax(0,1fr)}.b4s-wordmark{font-size:23px}.b4s-step{font-size:11px;gap:4px}.b4s-step:nth-of-type(4){margin-left:8px}.b4s-step .b4s-icon{width:13px;height:13px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}html{scroll-behavior:auto}}