/* =====================================================================
   Case-study detail pages. Loads on top of styles.css (tokens, fonts,
   .btn, .wrap). Everything here is prefixed .cs-* / .shot to avoid
   colliding with the home page's component classes.
   ===================================================================== */

/* Detach from the home page's full-page-scroll + dock behaviours */
html { scroll-snap-type: none; scroll-behavior: smooth; }
body.case-page {
  padding-bottom: 0;
  background: var(--bg);
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

.case-page ::selection { background: var(--color-primary); color: #1d1d1d; }

/* ---- Sticky top bar ---- */
.cs-top {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem clamp(1rem, 4vw, 2rem);
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  -webkit-backdrop-filter: blur(14px) saturate(1.3);
  backdrop-filter: blur(14px) saturate(1.3);
  border-bottom: 1px solid var(--line);
}
.cs-top__back,
.cs-top__cta {
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink-muted);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: color 0.25s ease, gap 0.3s var(--ease-out-expo);
}
.cs-top__back:hover { color: var(--ink); gap: 0.75rem; }
.cs-top__cta { color: var(--color-primary); }
.cs-top__cta:hover { gap: 0.75rem; }
.cs-top__logo {
  display: inline-flex;
  color: var(--color-primary);
}
.cs-top__logo svg {
  height: 22px;
  width: auto;
  display: block;
  transition: transform 0.35s var(--ease-out-expo), filter 0.35s ease;
}
.cs-top__logo:hover svg,
.cs-top__logo:focus-visible svg {
  transform: scale(1.12);
  filter: drop-shadow(0 0 10px color-mix(in srgb, var(--color-primary) 55%, transparent));
}

/* ---- Shared section rhythm ---- */
.cs-main { overflow: clip; }
.cs-section { padding-block: clamp(3.5rem, 9vw, 7rem); }
.cs-section--tight { padding-block: clamp(2.5rem, 6vw, 4rem); }
.cs-divider { border: 0; border-top: 1px solid var(--line); margin: 0; }

.cs-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  margin: 0 0 1.4rem;
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-primary);
}
.cs-kicker__num { color: var(--ink-faint); }
.cs-h2 {
  margin: 0 0 1.1rem;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4.4vw, 3.2rem);
  font-weight: 600;
  line-height: 1.02;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  color: var(--ink);
}
.cs-lead {
  max-width: 46ch;
  margin: 0;
  font-size: clamp(1.1rem, 1.9vw, 1.4rem);
  line-height: 1.5;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.cs-body { color: var(--ink-muted); line-height: 1.7; font-size: 1.02rem; }
.cs-body p { margin: 0 0 1rem; }
.cs-body strong { color: var(--ink); font-weight: 600; }

/* ---- Hero ---- */
.cs-hero { padding-top: clamp(2.5rem, 6vw, 4.5rem); padding-bottom: clamp(1.5rem, 4vw, 2.5rem); }
.cs-hero__eyebrow {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.4rem;
  margin: 0 0 1.5rem;
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-primary);
}
.cs-hero__eyebrow span:not(:first-child) { color: var(--ink-faint); }
.cs-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 9vw, 6.5rem);
  font-weight: 600;
  line-height: 0.95;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  color: var(--ink);
}
.cs-tagline {
  max-width: 30ch;
  margin: clamp(1.25rem, 3vw, 2rem) 0 0;
  font-size: clamp(1.2rem, 2.4vw, 1.7rem);
  font-weight: 500;
  line-height: 1.32;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.cs-tagline b { color: var(--color-primary); font-weight: 600; }

/* meta strip */
.cs-meta {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem 2rem;
  margin-top: clamp(2rem, 5vw, 3.25rem);
  padding-top: 1.6rem;
  border-top: 1px solid var(--line);
}
@media (min-width: 720px) { .cs-meta { grid-template-columns: repeat(4, 1fr); } .cs-meta--3 { grid-template-columns: repeat(3, 1fr); } }
.cs-meta dt {
  font-family: var(--font-display);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 0.45rem;
}
.cs-meta dd { margin: 0; font-size: 0.98rem; font-weight: 500; color: var(--ink); line-height: 1.45; }
/* ---- Browser-framed screenshot ---- */
.shot {
  position: relative;
  border-radius: 14px;
  overflow: hidden;
  background: #0c0c0e;
  border: 1px solid var(--line);
  box-shadow: 0 50px 100px -45px rgba(0, 0, 0, 0.85), 0 0 0 1px rgba(255, 255, 255, 0.02);
}
.shot__bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  height: 42px;
  padding: 0 0.95rem;
  background: #161618;
  border-bottom: 1px solid var(--line);
}
.shot__dot { width: 10px; height: 10px; border-radius: 50%; }
.shot__url {
  margin-left: 0.8rem;
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--ink-faint);
}
.shot__img { display: block; width: 100%; height: auto; }
.shot--glow { box-shadow: 0 60px 120px -50px rgba(0, 0, 0, 0.9), 0 0 80px -30px color-mix(in srgb, var(--color-primary) 30%, transparent); }
.shot__cap {
  margin: 0.9rem 0.15rem 0;
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.shot__cap b { color: var(--ink-muted); font-weight: 600; margin-right: 0.5rem; }

/* Full-width hero image — edge to edge, no frame */
.cs-hero-media { margin-top: clamp(2.25rem, 5vw, 3.5rem); }
.cs-hero-media img { display: block; width: 100%; height: auto; }

/* hero visual sits in a tinted, glowing stage */
.cs-stage {
  margin-top: clamp(2.25rem, 5vw, 3.5rem);
  padding: clamp(1.25rem, 4vw, 3rem);
  border-radius: 22px;
  border: 1px solid var(--line);
  background:
    radial-gradient(900px 420px at 82% -20%, color-mix(in srgb, var(--color-primary) 12%, transparent), transparent 60%),
    radial-gradient(800px 600px at 8% 120%, color-mix(in srgb, #7d5cf6 26%, transparent), transparent 55%),
    var(--bg-muted);
}

/* ---- Overview band ---- */
.cs-overview {
  display: grid;
  gap: clamp(2rem, 5vw, 3rem);
}
@media (min-width: 900px) {
  .cs-overview { grid-template-columns: 1.1fr 0.9fr; align-items: start; gap: clamp(2.5rem, 6vw, 5rem); }
  /* top-align the stats grid with the body copy, not the kicker */
  .cs-overview .cs-stats { margin-top: 2.925rem; }
}
.cs-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

/* ---- Research flow chart ---- */
.cs-study { margin-top: clamp(2rem, 5vw, 3rem); }
.cs-study__sources { display: grid; gap: 1rem; }
@media (min-width: 720px) { .cs-study__sources { grid-template-columns: 1fr 1fr; gap: 1.25rem; } }
.cs-study__box {
  position: relative;
  border: 1px solid var(--line);
  background: var(--bg-muted);
  padding: 1.1rem 1.3rem;
}
.cs-study__box b {
  display: block;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink);
}
.cs-study__box span { display: block; margin-top: 0.45rem; font-size: 0.92rem; line-height: 1.55; color: var(--ink-muted); }
.cs-study__box i {
  display: block;
  margin-bottom: 0.4rem;
  font-family: var(--font-display);
  font-style: normal;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--color-primary);
}
.cs-study__box--hub {
  max-width: 30rem;
  margin-inline: auto;
  text-align: center;
  border-color: color-mix(in srgb, var(--color-primary) 55%, transparent);
  background: color-mix(in srgb, var(--color-primary) 8%, var(--bg-muted));
}
/* vertical connector with arrowhead */
.cs-study__joint {
  width: 1px;
  height: 2.1rem;
  margin: 0 auto;
  background: var(--ink-faint);
  position: relative;
}
.cs-study__joint::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 1px;
  width: 7px;
  height: 7px;
  border-right: 1px solid var(--ink-faint);
  border-bottom: 1px solid var(--ink-faint);
  transform: translateX(-50%) rotate(45deg);
}
.cs-study__steps { display: grid; gap: 1rem; }
@media (min-width: 900px) {
  .cs-study__steps { grid-template-columns: repeat(3, 1fr); gap: 2.5rem; }
  .cs-study__steps .cs-study__box:not(:last-child)::after {
    content: "→";
    position: absolute;
    right: -1.95rem;
    top: 50%;
    transform: translateY(-50%);
    font-family: var(--font-display);
    color: var(--ink-faint);
  }
}
/* AI-first framework: two tracks above one prototype, engineers below */
.cs-study__panels { display: grid; gap: 1.25rem; }
@media (min-width: 900px) {
  .cs-study__panels { position: relative; grid-template-columns: 1fr 1fr; gap: 2.5rem; }
  .cs-study__panels::after {
    content: "→";
    position: absolute;
    left: 50%;
    top: 42%;
    transform: translate(-50%, -50%);
    font-family: var(--font-display);
    color: var(--ink-faint);
  }
}
.cs-study__panel { border: 1px solid var(--line); padding: 1.1rem; }
.cs-study__who { display: flex; gap: 0.75rem; margin-bottom: 1rem; }
.cs-study__who .cs-study__mini { flex: 1; color: var(--ink); }
.cs-study__panel--eng { max-width: 30rem; margin: 0 auto; }
.cs-study__panel--eng > .cs-study__mini { margin-top: 0.75rem; }
.cs-study__panel--eng > .cs-study__who { margin-bottom: 0; }
/* the designer's iteration cycle: demo loops back to the top */
.cs-study__cycle { position: relative; }
.cs-study__sideloop {
  position: absolute;
  right: -12px;
  top: 19px;
  bottom: 19px;
  width: 12px;
  border: 1px solid var(--ink-faint);
  border-left: none;
  border-radius: 0 8px 8px 0;
  pointer-events: none;
}
.cs-study__sideloop::after {
  content: "";
  position: absolute;
  left: -2px;
  top: -3px;
  width: 6px;
  height: 6px;
  border-left: 1px solid var(--ink-faint);
  border-bottom: 1px solid var(--ink-faint);
  transform: rotate(45deg);
}
/* two-way connector between iterate and usability test */
.cs-study__joint--duo {
  width: 9px;
  background: none;
  border-left: 1px solid var(--ink-faint);
  border-right: 1px solid var(--ink-faint);
}
.cs-study__joint--duo::after { left: 0; }
.cs-study__joint--duo::before {
  content: "";
  position: absolute;
  right: -3px;
  top: 1px;
  width: 6px;
  height: 6px;
  border-left: 1px solid var(--ink-faint);
  border-top: 1px solid var(--ink-faint);
  transform: rotate(45deg);
}
/* merge connector: steps 01 and 02 both drop into the node below */
.cs-study__merge { display: none; }
@media (min-width: 900px) {
  .cs-study__merge { position: relative; display: block; height: 28px; }
  .cs-study__merge::before {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: calc(25% - 0.625rem);
    right: calc(25% - 0.625rem);
    border-left: 1px solid var(--ink-faint);
    border-right: 1px solid var(--ink-faint);
    border-bottom: 1px solid var(--ink-faint);
  }
}
/* tile descriptions live in hover/focus popovers (inline on touch screens) */
.cs-study__mini > .cs-study__tip {
  display: block;
  margin-top: 0.45rem;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: normal;
  text-transform: none;
  text-align: left;
  line-height: 1.55;
  color: var(--ink-muted);
}
@media (hover: hover) {
  .cs-study__box,
  .cs-study__mini:has(> .cs-study__tip) { cursor: help; }
  .cs-study__mini > .cs-study__tip,
  .cs-study__box > span {
    position: absolute;
    left: 50%;
    bottom: calc(100% + 10px);
    transform: translateX(-50%) translateY(4px);
    width: max-content;
    max-width: min(320px, 85vw);
    margin: 0;
    padding: 0.75rem 0.95rem;
    text-align: left;
    background: var(--bg-elevated);
    border: 1px solid color-mix(in srgb, var(--color-primary) 35%, var(--line));
    box-shadow: 0 18px 40px -18px rgba(0, 0, 0, 0.8);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s;
    z-index: 6;
  }
  .cs-study__box:hover,
  .cs-study__box:focus-visible,
  .cs-study__mini:hover,
  .cs-study__mini:focus-visible { z-index: 7; }
  .cs-study__box:hover > span,
  .cs-study__box:focus-visible > span,
  .cs-study__mini:hover > .cs-study__tip,
  .cs-study__mini:focus-visible > .cs-study__tip {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
  }
}

/* highlighted node — same treatment as the accent tile in the team diagram */
.cs-study__box--hl {
  border-color: color-mix(in srgb, var(--color-primary) 55%, var(--line));
  background:
    radial-gradient(320px 160px at 50% 0, color-mix(in srgb, var(--color-primary) 8%, transparent), transparent 70%),
    var(--bg-muted);
}
/* before / after framework pivot chart */
.cs-study--pivot { margin-top: clamp(2.5rem, 6vw, 4rem); }
.cs-study__label {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.cs-study__label--after { margin-top: 2.5rem; }
.cs-study__mini {
  position: relative;
  border: 1px solid var(--line);
  background: var(--bg-muted);
  padding: 0.75rem 0.9rem;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-align: center;
  color: var(--ink-muted);
}
.cs-study__chain { display: grid; gap: 0.75rem; }
@media (min-width: 720px) {
  .cs-study__chain { grid-template-columns: repeat(5, 1fr); gap: 1.9rem; }
  .cs-study__chain .cs-study__mini:not(:last-child)::after {
    content: "→";
    position: absolute;
    right: -1.5rem;
    top: 50%;
    transform: translateY(-50%);
    font-family: var(--font-display);
    font-size: 0.8rem;
    color: var(--ink-faint);
  }
  /* loop members: forward arrows pick up the accent colour */
  .cs-study__chain .cs-study__mini.cs-study__mini--loop::after { color: var(--color-primary); }
}
/* note tile under the loop */
.cs-study__loopnote {
  max-width: 34rem;
  margin: 1rem auto 0;
  border: 1px solid var(--line);
  background: var(--bg-muted);
  padding: 0.8rem 1.1rem;
  font-size: 0.9rem;
  line-height: 1.55;
  color: var(--ink-muted);
  text-align: center;
}
@media (min-width: 720px) { .cs-study__loopnote { margin-top: 2.6rem; } }

/* return arc: runs under the row from Stakeholder demo back to Figma mocks */
.cs-study__loopback { display: none; }
@media (min-width: 720px) {
  .cs-study__loopback {
    display: block;
    position: absolute;
    left: 50%;
    width: calc(200% + 3.8rem + 4px);
    height: 20px;
    bottom: -21px;
    border: 1px solid var(--color-primary);
    border-top: none;
    border-radius: 0 0 12px 12px;
    pointer-events: none;
  }
  .cs-study__loopback::after {
    content: "";
    position: absolute;
    left: -3.5px;
    top: 1px;
    width: 6px;
    height: 6px;
    border-left: 1px solid var(--color-primary);
    border-top: 1px solid var(--color-primary);
    transform: rotate(45deg);
  }
}
.cs-study__joint--up { transform: rotate(180deg); }
.cs-stat { background: var(--bg); padding: clamp(1.1rem, 2.6vw, 1.6rem); }
.cs-stat__value {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--color-primary);
}
.cs-stat__label {
  margin-top: 0.55rem;
  font-size: 0.84rem;
  line-height: 1.4;
  color: var(--ink-muted);
}

/* ---- Problem points ---- */
.cs-points { list-style: none; margin: clamp(1.5rem,4vw,2.5rem) 0 0; padding: 0; display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.cs-point { background: var(--bg); padding: clamp(1.25rem, 3vw, 1.9rem); display: grid; grid-template-columns: auto 1fr; gap: 1rem 1.25rem; align-items: start; }
.cs-point__no { font-family: var(--font-display); font-size: 0.8rem; font-weight: 600; letter-spacing: 0.1em; color: var(--color-primary); padding-top: 0.2rem; }
.cs-point h3 { margin: 0 0 0.35rem; font-family: var(--font-display); font-size: 1.05rem; font-weight: 600; letter-spacing: 0.01em; text-transform: uppercase; color: var(--ink); }
.cs-point p { margin: 0; color: var(--ink-muted); line-height: 1.6; font-size: 0.96rem; }
@media (min-width: 760px) { .cs-points--2 { grid-template-columns: 1fr 1fr; } }

/* ---- Solution feature blocks ---- */
.cs-feature { display: grid; gap: clamp(1.5rem, 4vw, 2.5rem); align-items: center; margin-top: 40px; }
@media (min-width: 900px) { .cs-feature { grid-template-columns: 1fr 1fr; gap: clamp(2.5rem, 5vw, 4.5rem); } .cs-feature--flip .cs-feature__media { order: -1; } }
.cs-feature + .cs-feature { margin-top: clamp(3rem, 7vw, 6rem); }
.cs-feature__tag { font-family: var(--font-display); font-size: 0.72rem; font-weight: 600; letter-spacing: 0.18em; text-transform: uppercase; color: var(--color-primary); }
.cs-feature h3 { margin: 0.8rem 0 0.9rem; font-family: var(--font-display); font-size: clamp(1.5rem, 3vw, 2.1rem); font-weight: 600; line-height: 1.08; letter-spacing: -0.01em; text-transform: uppercase; color: var(--ink); }

/* ---- Principles grid ---- */
.cs-principles { display: grid; gap: 1px; margin-top: clamp(2rem, 5vw, 3rem); background: var(--line); border: 1px solid var(--line); }
@media (min-width: 640px) { .cs-principles { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1000px) { .cs-principles { grid-template-columns: repeat(3, 1fr); } }
.cs-principle { background: var(--bg); padding: clamp(1.4rem, 3vw, 2rem); min-height: 13.5rem; display: flex; flex-direction: column; transition: background 0.3s ease; }
.cs-principle:hover { background: var(--bg-muted); }
.cs-principle__no { font-family: var(--font-display); font-size: 0.78rem; font-weight: 600; letter-spacing: 0.12em; color: var(--ink-faint); }
.cs-principle h3 { margin: clamp(1.5rem, 4vw, 2.5rem) 0 0.6rem; font-family: var(--font-display); font-size: 1.18rem; font-weight: 600; line-height: 1.12; letter-spacing: 0.01em; text-transform: uppercase; color: var(--ink); }
.cs-principle h3 b { color: var(--color-primary); font-weight: 600; }
.cs-principle p { margin: auto 0 0; color: var(--ink-muted); font-size: 0.92rem; line-height: 1.55; }

/* ---- Framework / process flow ---- */
.cs-flow { display: grid; gap: 1.25rem; margin-top: clamp(2rem, 5vw, 3rem); counter-reset: step; }
@media (min-width: 820px) { .cs-flow { grid-template-columns: repeat(4, 1fr); gap: 0; } }
.cs-step { position: relative; padding: clamp(1.25rem, 3vw, 1.75rem) clamp(1.25rem, 2.5vw, 1.6rem); border: 1px solid var(--line); }
@media (min-width: 820px) { .cs-step { border-right: 0; } .cs-step:last-child { border-right: 1px solid var(--line); } }
.cs-step__no { display: inline-flex; align-items: center; justify-content: center; width: 2.1rem; height: 2.1rem; border: 1px solid color-mix(in srgb, var(--color-primary) 50%, var(--line)); color: var(--color-primary); font-family: var(--font-display); font-size: 0.8rem; font-weight: 600; }
.cs-step h3 { margin: 1.1rem 0 0.4rem; font-family: var(--font-display); font-size: 1.05rem; font-weight: 600; letter-spacing: 0.02em; text-transform: uppercase; color: var(--ink); }
.cs-step p { margin: 0; color: var(--ink-muted); font-size: 0.9rem; line-height: 1.55; }
.cs-step::after { content: ""; position: absolute; top: calc(clamp(1.25rem, 3vw, 1.75rem) + 1rem); right: -1px; width: 7px; height: 7px; background: var(--color-primary); border-radius: 50%; opacity: 0; }
@media (min-width: 820px) { .cs-step:not(:last-child)::after { opacity: 1; transform: translateX(50%); } }

/* ---- Team workflow diagram ---- */
.cs-wf { margin-top: clamp(2rem, 5vw, 3rem); }
.cs-wf__row {
  display: grid;
  grid-template-columns: 1fr auto 1.15fr auto 1fr;
  align-items: stretch;
  gap: 0;
}
.cs-wf__role {
  position: relative;
  padding: clamp(1.25rem, 2.6vw, 1.75rem);
  border: 1px solid var(--line);
  background: var(--bg-muted);
  display: flex;
  flex-direction: column;
}
.cs-wf__role--me {
  border-color: color-mix(in srgb, var(--color-primary) 55%, var(--line));
  background:
    radial-gradient(320px 160px at 50% 0, color-mix(in srgb, var(--color-primary) 8%, transparent), transparent 70%),
    var(--bg-muted);
}
.cs-wf__no {
  font-family: var(--font-display);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-primary);
}
.cs-wf__role h3 {
  margin: 0.9rem 0 0.45rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  color: var(--ink);
}
.cs-wf__role p { margin: 0; color: var(--ink-muted); font-size: 0.9rem; line-height: 1.55; }
.cs-wf__edge {
  align-self: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  padding: 0 clamp(0.6rem, 1.6vw, 1.25rem);
  text-align: center;
}
.cs-wf__edge span {
  font-family: var(--font-display);
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
  line-height: 1.5;
}
.cs-wf__edge i {
  font-style: normal;
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: var(--color-primary);
  line-height: 1;
}
/* the return loop: a U-shaped rail from the engineer back to the PM */
.cs-wf__loop {
  position: relative;
  height: clamp(3.25rem, 7vw, 4.5rem);
  margin: 0 clamp(2.5rem, 6vw, 4.5rem);
  border: 1px solid color-mix(in srgb, var(--color-primary) 40%, var(--line));
  border-top: 0;
  display: flex;
  align-items: flex-end;
  justify-content: center;
}
/* arrowhead where the rail re-enters the PM card */
.cs-wf__loop::before {
  content: "";
  position: absolute;
  left: -5px;
  top: -7px;
  border-left: 4.5px solid transparent;
  border-right: 4.5px solid transparent;
  border-bottom: 9px solid var(--color-primary);
}
.cs-wf__loop-label {
  transform: translateY(50%);
  background: var(--bg);
  padding: 0.3rem 0.9rem;
  font-family: var(--font-display);
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-muted);
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  border: 1px solid var(--line);
}
.cs-wf__loop-label i {
  font-style: normal;
  color: var(--color-primary);
  font-size: 0.95rem;
}
@media (max-width: 759px) {
  .cs-wf__row { grid-template-columns: 1fr; }
  .cs-wf__edge { padding: 0.85rem 0; }
  .cs-wf__edge i { transform: rotate(90deg); }
  .cs-wf__loop { margin: 0 15%; }
}

/* ---- Gallery ---- */
.cs-gallery { display: grid; gap: clamp(1.5rem, 4vw, 2.5rem); margin-top: clamp(2rem, 5vw, 3rem); }
.cs-gallery__wide { grid-column: 1 / -1; }
@media (min-width: 900px) { .cs-gallery--split { grid-template-columns: 1fr 1fr; } }

/* ---- Outcomes callout ---- */
.cs-callout {
  margin-top: clamp(2.5rem, 6vw, 4rem);
  padding: clamp(1.75rem, 5vw, 3.25rem);
  border: 1px solid color-mix(in srgb, var(--color-primary) 22%, var(--line));
  background:
    radial-gradient(700px 300px at 100% 0, color-mix(in srgb, var(--color-primary) 9%, transparent), transparent 60%),
    var(--bg-muted);
}
.cs-outcomes { display: grid; gap: clamp(1.5rem, 4vw, 2.5rem); }
@media (min-width: 760px) { .cs-outcomes { grid-template-columns: repeat(3, 1fr); } }
.cs-outcome__value { font-family: var(--font-display); font-size: clamp(1.6rem, 3.4vw, 2.3rem); font-weight: 600; line-height: 1.05; color: var(--ink); letter-spacing: -0.01em; }
.cs-outcome__value b { color: var(--color-primary); font-weight: 600; }
.cs-outcome__label { margin-top: 0.6rem; color: var(--ink-muted); font-size: 0.92rem; line-height: 1.5; }
.cs-note { margin-top: 1.75rem; padding-top: 1.25rem; border-top: 1px solid var(--line); font-size: 0.82rem; color: var(--ink-faint); line-height: 1.6; }
.cs-note code { font-family: var(--font-display); color: var(--ink-muted); }

/* ---- Next / footer nav ---- */
.cs-next { border-top: 1px solid var(--line); }
.cs-next__link {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding-block: clamp(2.5rem, 7vw, 5rem);
  text-decoration: none;
  color: inherit;
}
.cs-next__eyebrow { font-family: var(--font-display); font-size: 0.72rem; font-weight: 600; letter-spacing: 0.2em; text-transform: uppercase; color: var(--ink-faint); }
.cs-next__title {
  margin: 0.7rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 6vw, 4.5rem);
  font-weight: 600;
  line-height: 0.98;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  color: var(--ink);
  transition: color 0.3s ease;
}
.cs-next__arrow { font-family: var(--font-display); font-size: clamp(1.5rem, 4vw, 2.5rem); color: var(--color-primary); transition: transform 0.4s var(--ease-out-expo); }
.cs-next__link:hover .cs-next__title { color: var(--color-primary); }
.cs-next__link:hover .cs-next__arrow { transform: translateX(0.6rem); }

.cs-foot { padding-block: 2.5rem; border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; gap: 0.75rem 1.5rem; justify-content: space-between; align-items: center; }
.cs-foot p { margin: 0; font-size: 0.84rem; color: var(--ink-faint); }
.cs-foot a { color: var(--ink-muted); text-decoration: none; font-family: var(--font-display); font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; }
.cs-foot a:hover { color: var(--color-primary); }

/* ---- Scroll reveal (self-contained, see inline script) ---- */
.cs-reveal { opacity: 0; transform: translateY(22px); transition: opacity 0.8s var(--ease-out-expo), transform 0.8s var(--ease-out-expo); }
.cs-reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .cs-reveal { opacity: 1; transform: none; transition: none; } }