/* A chapter's words: who it is, a bold statement with its points, the control the scroll moves through,
   and how to get it. Bold words carry the message; the rest supports them at a softer ink. */
/* the column sits between the nav and the rail, and everything in it scales with the window's width and height */
.ch {
  position: absolute; top: 72px; bottom: 96px; left: clamp(28px, 6.4vw, 120px); width: clamp(360px, 36vw, 600px); z-index: 5;
  display: flex; flex-direction: column; justify-content: center; align-items: flex-start; gap: clamp(14px, 2.7vh, 26px); visibility: hidden;
}
.ch[data-side="right"] { left: auto; right: clamp(28px, 6.4vw, 120px); }
.ch-head { display: flex; align-items: center; gap: 14px; }
/* the app's icon and name lead to its own page: quiet, the name underlines on hover and focus */
.ch-app { display: flex; align-items: center; gap: inherit; border-radius: 12px; outline-offset: 6px; }
.ch-app:hover b, .ch-app:focus-visible b { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 0.2em; }
.ch-head img { width: clamp(42px, 6vh, 52px); height: clamp(42px, 6vh, 52px); border-radius: 23%; box-shadow: 0 8px 22px rgba(0, 0, 0, 0.28); }
.ch-head p { display: flex; flex-direction: column; gap: 2px; }
.ch-head b { font-size: 19px; font-weight: 740; letter-spacing: -0.01em; }
.ch-head span { font-size: 14px; font-weight: 560; color: var(--ink-3); text-wrap: pretty; }

/* its height is set to the chapter's tallest statement (Copy.measure); this is only the first guess */
.ch-stmts { position: relative; width: 100%; height: clamp(270px, 46vh, 430px); margin-bottom: clamp(4px, 0.9vh, 10px); }
.stmt { position: absolute; inset: 0; visibility: hidden; }
.stmt h2 {
  font-size: clamp(32px, min(3.9vw, 6.4vh), 78px); font-weight: 820; font-stretch: 125%; line-height: 0.98; letter-spacing: -0.035em;
  margin-bottom: clamp(12px, 2.5vh, 30px); text-wrap: balance;
}
.stmt h2 .w { display: inline-block; overflow: hidden; vertical-align: top; padding: 0.04em 0 0.1em; margin: -0.04em 0 -0.1em; }
.stmt h2 .w > span { display: inline-block; will-change: transform, opacity; }
.stmt ul { list-style: none; display: grid; gap: clamp(9px, 1.7vh, 18px); }
.stmt li { --ic: clamp(32px, 4.8vh, 40px); display: grid; grid-template-columns: var(--ic) minmax(0, 1fr); gap: clamp(11px, 1.1vw, 15px); align-items: start; will-change: transform, opacity; }
.pt-ic {
  width: var(--ic); height: var(--ic); border-radius: 30%; display: grid; place-items: center; color: var(--acc);
  background: color-mix(in oklab, var(--acc) 15%, transparent); box-shadow: inset 0 0 0 1px color-mix(in oklab, var(--acc) 22%, transparent);
}
.pt-ic .i { width: 52%; height: 52%; }
.stmt li p { --fs: clamp(14px, min(1.15vw, 2.1vh), 20px); padding-top: calc((var(--ic) - var(--fs) * 1.42) / 2); font-size: var(--fs); line-height: 1.42; color: rgba(var(--ink-rgb), var(--soft)); font-weight: 420; text-wrap: pretty; }
.stmt li b { color: var(--ink); font-weight: 680; }

.seg { position: relative; display: inline-flex; padding: 4px; border-radius: 999px; background: var(--chip); box-shadow: inset 0 0 0 1px var(--line); }
.seg-thumb { position: absolute; left: 0; top: 4px; bottom: 4px; width: 0; border-radius: 999px; background: var(--thumb); box-shadow: 0 4px 14px rgba(0, 0, 0, 0.2); }
.seg { --sh: clamp(32px, 4.6vh, 38px); --sp: clamp(9px, 1.05vw, 16px); --segf: clamp(12.5px, 1.02vw, 14.5px); max-width: 100%; }
.seg button { position: relative; z-index: 1; height: var(--sh); padding: 0 var(--sp); border-radius: 999px; font-size: var(--segf); font-weight: 620; white-space: nowrap; color: var(--ink-2); }
.seg button:hover { color: var(--ink); }
.seg-ink { position: absolute; inset: 0; z-index: 2; display: flex; padding: 4px; pointer-events: none; }
.seg-ink span { height: var(--sh); padding: 0 var(--sp); display: grid; place-items: center; font-size: var(--segf); font-weight: 620; white-space: nowrap; color: var(--thumb-ink); }

.ch-get { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.cta {
  display: inline-flex; align-items: center; gap: 10px; height: clamp(42px, 6vh, 50px); padding: 0 clamp(18px, 1.7vw, 24px); border-radius: 999px; font-size: clamp(14px, 1.08vw, 15.5px); font-weight: 650;
  background: var(--ink); color: var(--thumb-ink); transition: transform 0.2s;
}
.cta:hover { transform: translateY(-1px); }
/* not out yet: a status, not a button */
.cta-soon { height: auto; padding: 0; background: none; color: var(--ink); font-weight: 640; cursor: default; }
.cta-soon::before { content: ""; flex: none; width: 8px; height: 8px; border-radius: 50%; background: var(--acc); box-shadow: 0 0 0 4px color-mix(in oklab, var(--acc) 24%, transparent); }
.cta-soon:hover { transform: none; }
.ch-get small { font-size: 13px; color: var(--ink-3); max-width: 30ch; line-height: 1.35; text-wrap: pretty; }
/* the chapter's way on to its app's own page: a pill with an arrow that leans forward on hover */
.cta-explore { white-space: nowrap; }
.cta-arrow { flex: none; width: 15px; height: 15px; margin-right: -2px; fill: none; stroke: currentColor; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; transition: transform 0.2s; }
.cta-explore:hover .cta-arrow, .cta-explore:focus-visible .cta-arrow { transform: translateX(3px); }
/* the App Store's own badge, so getting the app never looks like another segment of the control */
.cta-badge { display: inline-block; border-radius: 10px; transition: transform 0.2s; }
.cta-badge img { display: block; height: clamp(42px, 5.6vh, 50px); width: auto; }
.cta-badge:hover { transform: translateY(-1px); }