/* Terms: the site's white system, tuned for reading. Tokens come from ../premium.css. */
html{scroll-behavior:smooth;scroll-padding-top:90px;background:#fff}
.t-body{margin:0;background:#fff;color:var(--x-ink);font-family:var(--x-font);font-size:17px;line-height:1.7;-webkit-font-smoothing:antialiased}
.t-body ::selection{background:var(--x-key);color:var(--x-ink)}
.t-body :focus-visible{outline:2px solid var(--x-ink);outline-offset:3px;border-radius:6px}
.t-wrap{max-width:1180px;margin:0 auto;padding:0 var(--x-edge)}

/* reading progress */
.t-progress{position:fixed;inset:0 0 auto;height:3px;z-index:60;background:transparent}
.t-progress i{display:block;height:100%;width:100%;background:var(--x-key);transform-origin:left;transform:scaleX(0)}

/* bar */
.t-bar{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.82);backdrop-filter:saturate(180%) blur(18px);-webkit-backdrop-filter:saturate(180%) blur(18px);border-bottom:1px solid var(--x-line)}
.t-bar-inner{max-width:1180px;margin:0 auto;padding:0 var(--x-edge);height:62px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.t-brand{display:flex;align-items:center;gap:9px;font-weight:700;letter-spacing:-.02em;color:var(--x-ink);text-decoration:none}
.t-brand img{width:24px;height:24px}
.t-bar-title{font:500 13px/1 var(--x-mono);color:var(--x-mute)}
.t-bar-cta{display:inline-flex;align-items:center;min-height:38px;padding:0 16px;border-radius:999px;background:var(--x-ink);color:#fff;font:600 14px/1 var(--x-font);text-decoration:none;transition:transform .4s var(--x-spring)}
.t-bar-cta:hover{transform:translateY(-1px)}

/* hero */
.t-hero{padding:clamp(70px,9vw,120px) 0 clamp(50px,6vw,80px);background:radial-gradient(circle at 1px 1px,rgba(0,0,0,.07) 1px,transparent 0) 0 0/26px 26px;position:relative}
.t-hero::after{content:"";position:absolute;inset:auto 0 0;height:120px;background:linear-gradient(transparent,#fff);pointer-events:none}
.t-hero .t-wrap{position:relative;z-index:1}
.t-kicker{display:inline-flex;align-items:center;gap:8px;font:600 13px/1 var(--x-font);letter-spacing:.02em;text-transform:uppercase;color:var(--x-mute)}
.t-kicker::before{content:"";width:8px;height:8px;border-radius:2px;background:var(--x-key)}
.t-h1{margin:18px 0 22px;font:700 clamp(46px,7vw,96px)/.94 var(--x-font);letter-spacing:-.055em}
.t-h1 span{color:#a3a3a8}
.t-date{display:inline-flex;align-items:center;gap:8px;margin:0 0 26px;padding:7px 13px;border:1px solid var(--x-line-2);border-radius:999px;background:#fff;font:500 13px/1 var(--x-mono);color:var(--x-ink-2)}
.t-date i{display:none}
.t-intro{max-width:60ch;margin:0;font-size:clamp(18px,1.5vw,20px);line-height:1.6;color:var(--x-ink-2)}
.t-short{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:40px}
.t-short>div{padding:20px;border-radius:20px;background:#fff;border:1px solid var(--x-line);box-shadow:0 20px 40px -34px rgba(0,0,0,.35);transition:transform .5s var(--x-spring),border-color .3s}
.t-short>div:hover{transform:translateY(-4px);border-color:var(--x-ink)}
.t-short b{display:block;font-size:16px;font-weight:600;letter-spacing:-.015em;line-height:1.3}
.t-short p{margin:8px 0 0;font-size:14.5px;line-height:1.5;color:var(--x-mute)}
.t-short-note{margin:16px 0 0;font-size:13.5px;color:var(--x-mute)}

/* two-column body with a sticky contents rail */
.t-layout{display:grid;grid-template-columns:250px minmax(0,1fr);gap:clamp(32px,6vw,90px);padding-top:20px;padding-bottom:120px}
.t-toc{position:sticky;top:92px;align-self:start;max-height:calc(100vh - 110px);overflow:auto;padding:4px 0}
.t-toc-title{display:block;font:600 12px/1 var(--x-mono);letter-spacing:.06em;text-transform:uppercase;color:var(--x-mute);margin-bottom:14px}
.t-toc ol{list-style:none;margin:0;padding:0;counter-reset:t;border-left:1px solid var(--x-line)}
.t-toc li{counter-increment:t}
.t-toc a{display:flex;gap:10px;align-items:baseline;margin-left:-1px;padding:7px 0 7px 16px;border-left:2px solid transparent;font-size:14.5px;line-height:1.35;color:var(--x-mute);text-decoration:none;transition:color .2s,border-color .2s,background .2s}
.t-toc a::before{content:counter(t,decimal-leading-zero);font:500 11px/1.6 var(--x-mono);color:#b3b3b8}
.t-toc a:hover{color:var(--x-ink)}
.t-toc a.is-on{color:var(--x-ink);font-weight:600;border-left-color:var(--x-key);background:linear-gradient(90deg,var(--x-key-soft),transparent 80%)}
.t-toc a.is-on::before{color:var(--x-ink)}

.t-doc{max-width:720px}
.t-doc section{padding:36px 0;border-top:1px solid var(--x-line)}
.t-doc section:first-child{border-top:0;padding-top:12px}
.t-num{display:inline-block;font:600 12px/1 var(--x-mono);padding:6px 8px;border-radius:8px;background:#f0f0ec;color:var(--x-ink-2)}
.t-doc h2{margin:14px 0 16px;font:700 clamp(26px,2.8vw,34px)/1.1 var(--x-font);letter-spacing:-.04em}
.t-doc p,.t-doc li{color:var(--x-ink-2)}
.t-doc p{margin:0 0 16px}
.t-doc p:last-child{margin-bottom:0}
.t-doc b{color:var(--x-ink);font-weight:600;background:linear-gradient(transparent 62%,var(--x-key-soft) 62%)}
.t-doc ul{margin:0;padding:0;list-style:none;display:grid;gap:8px}
.t-doc li{position:relative;padding-left:26px}
.t-doc li::before{content:"";position:absolute;left:4px;top:.72em;width:8px;height:8px;border-radius:2px;background:var(--x-ink)}
.t-doc a{color:var(--x-ink);text-decoration:underline;text-decoration-color:var(--x-line-2);text-underline-offset:4px}
.t-doc a:hover{text-decoration-color:var(--x-ink)}
.t-foot{margin-top:24px;padding-top:28px;border-top:1px solid var(--x-line);font-size:14px;color:var(--x-mute)}
.t-foot p{color:var(--x-mute)}
.t-top-link{display:inline-flex;margin-bottom:14px;font:600 14px/1 var(--x-font);text-decoration:none!important}

@media(max-width:980px){
  .t-short{grid-template-columns:repeat(2,1fr)}
  .t-layout{grid-template-columns:1fr}
  .t-toc{position:static;max-height:none;border:1px solid var(--x-line);border-radius:20px;padding:20px}
  .t-toc ol{columns:2;column-gap:24px;border-left:0}
  .t-toc a{border-left:0;padding-left:0}
  .t-toc a.is-on{background:none}
}
@media(max-width:600px){
  .t-body{font-size:16px}
  .t-short{grid-template-columns:1fr}
  .t-toc ol{columns:1}
  .t-bar-title{display:none}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.t-short>div{transition:none}}