:root{
  --page:#EDF0EC;
  --ink:#1C2522;
  --ink-soft:#52625C;
  --channel:#1C5D63;
  --channel-deep:#0E3A3F;
  --sand:#E6DFD0;
  --rule:#C7D0C8;
  --measure:36rem;
  box-sizing:border-box;
  padding-top:env(safe-area-inset-top,0px);
  padding-bottom:env(safe-area-inset-bottom,0px);
  color-scheme:light;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --page:#0E1618;--ink:#DCE4E0;--ink-soft:#93A5A0;
    --channel:#6FB9AE;--channel-deep:#9AD3C9;--sand:#182326;--rule:#2A3739;
  }
}
:root[data-theme="dark"]{
  --page:#0E1618;--ink:#DCE4E0;--ink-soft:#93A5A0;
  --channel:#6FB9AE;--channel-deep:#9AD3C9;--sand:#182326;--rule:#2A3739;
  color-scheme:dark;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){color-scheme:dark}
}
*,*::before,*::after{box-sizing:inherit}
html{
  scroll-behavior:smooth;
  scroll-padding-top:calc(env(safe-area-inset-top,0px) + 2.5rem);
  -webkit-text-size-adjust:100%;
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{
  margin:0;
  background:var(--page);
  color:var(--ink);
  font-family:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  font-optical-sizing:auto;
  font-size:1.04rem;
  line-height:1.7;
  font-weight:400;
}
p{margin:0 0 1.35em}
a{color:var(--channel);text-underline-offset:.18em;text-decoration-thickness:.5px}
a:focus-visible,button:focus-visible{outline:2px solid var(--channel);outline-offset:3px;border-radius:2px}
img,svg{max-width:100%}

/* ---------- gauge ---------- */
.gauge{position:fixed;z-index:20;pointer-events:none}
@media (min-width:1080px){
  .gauge{
    left:2.75rem;
    top:calc(env(safe-area-inset-top,0px) + 14vh);
    bottom:14vh;width:1px;background:var(--rule);
  }
  .gauge__fill{position:absolute;top:0;left:0;width:1px;height:0;background:var(--channel)}
  .gauge__tick{position:absolute;left:0;width:9px;height:1px;background:var(--rule)}
  .gauge__mark{
    position:absolute;left:-.15rem;transform:translateY(-50%);
    font-family:"Source Serif 4",Georgia,"Times New Roman",serif;font-size:1.5rem;
    color:var(--channel);background:var(--page);padding:.15rem .35rem .15rem 0;
    line-height:1;font-weight:500;font-variant-numeric:lining-nums;
  }
  .gauge__word{
    position:absolute;left:0;bottom:-3.6rem;
    transform-origin:left bottom;transform:rotate(-90deg) translateY(-.9rem);
    font-size:.68rem;letter-spacing:.09em;color:var(--ink-soft);white-space:nowrap;
    font-style:italic;
  }
}
@media (max-width:1079px){
  .gauge{
    left:0;right:0;top:env(safe-area-inset-top,0px);
    height:2px;background:transparent;
  }
  .gauge__fill{height:2px;width:0;background:var(--channel)}
  .gauge__tick,.gauge__mark,.gauge__word{display:none}
}

/* ---------- shell ---------- */
.wrap{max-width:var(--measure);margin:0 auto;padding:0 1.5rem}
@media (min-width:1080px){.wrap{padding:0 2rem;margin-left:max(9rem,calc(50vw - 18rem))}}

/* ---------- cover ---------- */
.cover{min-height:88vh;display:flex;flex-direction:column;justify-content:center;padding:5rem 0 3rem}
.cover__eyebrow{font-style:italic;color:var(--ink-soft);font-size:.95rem;margin:0 0 2.2rem}
.cover h1{
  font-family:"Source Serif 4",Georgia,"Times New Roman",serif;
  font-weight:500;font-size:clamp(3rem,13vw,6.4rem);
  line-height:.94;letter-spacing:-.015em;margin:0;
}
.cover h1 em{font-style:italic;font-weight:400}
.cover__rule{margin:2.4rem 0 1.8rem;height:56px}
.cover__rule path{fill:none;stroke:var(--channel);stroke-width:1.25;stroke-linecap:round}
.cover__sub{font-size:1.2rem;line-height:1.5;max-width:26rem;color:var(--ink);margin:0 0 2.4rem}
.cover__by{font-size:.95rem;color:var(--ink-soft);margin:0}
.sprite{position:absolute;width:0;height:0;overflow:hidden}
.cover__grid{display:grid;grid-template-columns:1fr;gap:2.6rem;align-items:center}
@media (min-width:720px){.cover__grid{grid-template-columns:1fr 12.5rem;gap:2.6rem}.cover__grid h1{font-size:clamp(2.6rem,7vw,4.4rem)}}
.cover__art{width:100%;max-width:14rem;margin:0 auto;aspect-ratio:2/3;border-radius:2px;overflow:hidden;
  box-shadow:0 1px 0 rgba(0,0,0,.25),-10px 16px 36px rgba(0,0,0,.35)}
.cover__art svg{display:block;width:100%;height:100%}
.byline{display:inline-flex;align-items:center;gap:.8rem;margin:0;text-decoration:none;color:inherit}
.byline img{width:2.7rem;height:2.7rem;border-radius:50%;object-fit:cover;border:1px solid var(--rule);flex:none}
.byline b{display:block;font-size:1rem;font-weight:600;color:var(--ink);line-height:1.2}
.byline span span{display:block;font-size:.82rem;font-style:italic;color:var(--ink-soft)}
.byline b a{color:inherit;text-decoration:none}
.byline b a:hover{text-decoration:underline;text-underline-offset:.2em}
.portrait{position:relative;overflow:hidden;border-radius:2px}
.portrait img{width:100%;height:auto;aspect-ratio:4/5;object-fit:cover;display:block}
.portrait--tint img{filter:grayscale(1) contrast(1.06) brightness(1.02)}
.portrait--tint::after{content:"";position:absolute;inset:0;pointer-events:none;mix-blend-mode:multiply;
  background:linear-gradient(165deg,#2C7A78 0%,#1C5D63 55%,#0E3A3F 100%)}
.portrait--tint::before{content:"";position:absolute;inset:0;pointer-events:none;z-index:1;mix-blend-mode:screen;opacity:.35;
  background:linear-gradient(20deg,rgba(0,0,0,0) 40%,rgba(207,230,224,.9) 100%)}
.author__eyebrow{font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;color:var(--channel);margin:0 0 .6rem;font-weight:500}
.author__links{font-size:.9rem}

.plate{
  background:var(--sand);border-left:2px solid var(--channel);
  padding:1.3rem 1.4rem;margin:2.6rem 0;font-size:.97rem;line-height:1.62;
}
.plate p:last-child{margin-bottom:0}
.plate h4{
  font-family:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;font-size:1rem;font-weight:600;
  margin:0 0 .6rem;color:var(--channel-deep);
}

/* ---------- contents ---------- */
.contents{padding:4rem 0 2rem;border-top:1px solid var(--rule)}
.contents h2,.matter h2{
  font-family:"Source Serif 4",Georgia,"Times New Roman",serif;font-weight:500;
  font-size:2rem;margin:0 0 2rem;letter-spacing:-.01em;
}
.toc{list-style:none;margin:0;padding:0;counter-reset:toc}
.toc li{border-bottom:1px solid var(--rule);padding:.95rem 0}
.toc a{display:grid;grid-template-columns:2.4rem 1fr;gap:.9rem;text-decoration:none;color:var(--ink)}
.toc a:hover .toc__title{color:var(--channel)}
.toc__num{
  font-family:"Source Serif 4",Georgia,"Times New Roman",serif;font-size:1.35rem;
  color:var(--channel);line-height:1.2;font-variant-numeric:lining-nums;
}
.toc__title{font-size:1.06rem;line-height:1.35;display:block;transition:color .15s ease}
.toc__gloss{display:block;font-size:.88rem;color:var(--ink-soft);font-style:italic;margin-top:.2rem;line-height:1.45}

/* ---------- chapters ---------- */
.chapter{padding:4.5rem 0 1rem}
.chapter__head{margin:0 0 2.6rem}
.chapter__num{
  font-family:"Source Serif 4",Georgia,"Times New Roman",serif;
  font-size:clamp(4rem,16vw,7rem);line-height:.8;color:var(--channel);
  display:block;font-weight:400;font-variant-numeric:lining-nums;
  margin:0 0 .35rem;letter-spacing:-.03em;
}
.chapter__title{
  font-family:"Source Serif 4",Georgia,"Times New Roman",serif;font-weight:500;
  font-size:clamp(1.9rem,6.2vw,2.7rem);line-height:1.08;margin:0;letter-spacing:-.01em;
}
.standfirst{font-size:1.1rem;font-style:italic;color:var(--ink-soft);line-height:1.6;margin:1.2rem 0 0;max-width:30rem}
.chapter h3{
  font-family:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;font-size:1.12rem;font-weight:600;
  margin:2.6rem 0 .9rem;color:var(--channel-deep);line-height:1.4;
}
.lead::first-letter{
  font-family:"Source Serif 4",Georgia,"Times New Roman",serif;
  float:left;font-size:3.5rem;line-height:.82;padding:.08em .12em 0 0;color:var(--channel);font-weight:500;
}
blockquote{
  margin:2.4rem 0;padding:0;border:0;
  font-family:"Source Serif 4",Georgia,"Times New Roman",serif;
  font-style:italic;font-size:1.45rem;line-height:1.38;color:var(--channel-deep);
}
blockquote p{margin:0}
ul,ol{padding-left:1.15rem;margin:0 0 1.35em}
li{margin-bottom:.55em}
.tw{overflow-x:auto;margin:1.8rem 0;-webkit-overflow-scrolling:touch}
table{border-collapse:collapse;width:100%;min-width:30rem;font-size:.93rem}
th,td{text-align:left;padding:.62rem .8rem .62rem 0;border-bottom:1px solid var(--rule);vertical-align:top}
th{font-weight:600;color:var(--channel-deep);border-bottom-width:1.5px}
hr.flow{border:0;height:1px;background:var(--rule);margin:3.2rem 0 0}

.matter{padding:4rem 0}
.matter p{font-size:.98rem}
.author{
  padding:4rem 0;border-top:1px solid var(--rule);
  display:grid;grid-template-columns:11rem 1fr;gap:2rem;align-items:start;
}
@media (max-width:640px){.author{grid-template-columns:1fr;gap:1.5rem}}
.author__portrait{width:100%;display:block;filter:saturate(.88) contrast(1.02)}
.author__frame{border:1px solid var(--rule);padding:.4rem;background:var(--page);max-width:11rem}
.author h2{margin-bottom:1rem}
.author p{font-size:.98rem}
.author p:last-child{margin-bottom:0}
footer{padding:3rem 0 5rem;border-top:1px solid var(--rule);color:var(--ink-soft);font-size:.9rem}
.totop{background:none;border:0;padding:0;font:inherit;font-size:.9rem;color:var(--channel);cursor:pointer;font-style:italic}

/* ---- preview additions ---- */
.gate{
  margin:2.4rem 0 0;padding:2rem 1.6rem;background:var(--sand);
  border-top:2px solid var(--channel);text-align:center;
}
.gate h4{font-family:"Source Serif 4",Georgia,"Times New Roman",serif;font-weight:500;font-size:1.6rem;margin:0 0 .7rem;color:var(--channel-deep)}
.gate p{font-size:.98rem;max-width:26rem;margin:0 auto 1.4rem;color:var(--ink-soft)}
.gate p:last-child{margin-bottom:0}
.btn{
  display:inline-block;font:inherit;font-size:.97rem;line-height:1;padding:.85rem 1.4rem;
  border:1px solid var(--channel);background:var(--channel);color:#F3F7F5;
  text-decoration:none;border-radius:2px;cursor:pointer;
}
.btn:hover{background:var(--channel-deep);border-color:var(--channel-deep)}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--rule)}
.btn--ghost:hover{border-color:var(--channel);color:var(--channel)}
.btnrow{display:flex;flex-wrap:wrap;gap:.7rem;justify-content:center}
.toc li.locked a{color:var(--ink-soft)}
.toc li.locked .toc__num{color:var(--ink-soft);opacity:.65}
.toc li.locked{cursor:default}
.tag{
  display:inline-block;font-size:.72rem;font-style:italic;color:var(--channel);
  border:1px solid var(--rule);padding:.1rem .45rem;margin-left:.5rem;vertical-align:.1em;
}
.sample-bar{
  background:var(--channel-deep);color:#EAF3F0;text-align:center;
  padding:.6rem 1.5rem;font-size:.86rem;font-style:italic;
  position:sticky;top:env(safe-area-inset-top,0px);z-index:30;
}
.sample-bar a{color:#EAF3F0;text-underline-offset:.2em}
.sample-bar em{font-style:normal;font-weight:600}
.author{padding:4rem 0;border-top:1px solid var(--rule);display:grid;grid-template-columns:11rem 1fr;gap:2rem;align-items:start}
@media (max-width:640px){.author{grid-template-columns:1fr;gap:1.5rem}}
.author__frame{border:1px solid var(--rule);padding:.4rem;background:var(--page);max-width:11rem}

.author h2{margin:0 0 1rem;font-family:"Source Serif 4",Georgia,"Times New Roman",serif;font-weight:500;font-size:2rem;letter-spacing:-.01em}
.author p{font-size:.98rem}
footer{padding:3rem 0 5rem;border-top:1px solid var(--rule);color:var(--ink-soft);font-size:.9rem}