/* ============================================================
   CASE STUDY — single (detail) page template
   Reuses the global nav/footer + brand-invesp palette. Section
   classes are cst-* so they don't collide with anything global.
   ============================================================ */
:root{
  --cst-navy: 231 52% 25%;
  --cst-navy-edge: 233 56% 15%;
  --cst-violet: 263 75% 58%;
  --cst-green: 152 52% 40%;
  --cst-ink: 222 47% 12%;
  --cst-muted: 220 9% 42%;
  --cst-line: 220 16% 90%;
  --cst-tint: 220 24% 97%;
  --cst-display: 'Space Grotesk', 'Outfit', sans-serif;
}

/* ---------- Hero band ---------- */
.cst-hero{
  position:relative; color:#fff; padding:128px 0 64px; overflow:hidden;
  background:
    radial-gradient(110% 120% at 86% -18%, hsl(219 92% 58% / .3) 0%, transparent 48%),
    linear-gradient(162deg, hsl(var(--cst-navy)) 0%, hsl(var(--cst-navy-edge)) 100%);
}
.cst-crumb{ font-size:15px; color:hsl(220 24% 74%); margin-bottom:28px; display:flex; gap:9px; align-items:center; }
.cst-crumb a{ color:hsl(220 24% 80%); text-decoration:none; }
.cst-crumb a:hover{ color:#fff; }
/* focus ring stays visible on the dark hero band */
.cst-hero a:focus-visible{ outline-color:#fff; outline-offset:2px; }
.cst-crumb .sep{ opacity:.5; }
.cst-hero-grid{ display:grid; grid-template-columns:1.25fr .85fr; gap:64px; align-items:center; }
@media (max-width:900px){ .cst-hero-grid{ grid-template-columns:1fr; gap:40px; } }
.cst-tagrow{ display:flex; flex-wrap:wrap; gap:8px; margin-bottom:22px; }
.cst-tag{ font-size:13px; font-weight:600; letter-spacing:.05em; text-transform:uppercase;
  color:hsl(263 82% 86%); background:hsl(263 75% 62% / .18); padding:6px 12px; border-radius:999px; }
.cst-client{ font-family:var(--cst-display); font-size:clamp(40px,5vw,62px); font-weight:700;
  letter-spacing:-.025em; line-height:1; margin:0 0 22px; }
.cst-lead{ font-size:23px; line-height:1.45; color:hsl(220 30% 88%); margin:0; font-weight:450; max-width:24ch; }
.cst-lead .mk{ color:#fff; font-weight:600; }

/* hero right: logo plate + metric tiles */
.cst-herocard{ display:flex; flex-direction:column; gap:16px; }
.cst-logoplate{ background:#fff; border-radius:16px; padding:34px; display:flex; align-items:center; justify-content:center;
  min-height:120px; box-shadow:0 30px 60px -36px hsl(231 60% 6% / .7); }
.cst-logoplate img{ max-height:64px; max-width:230px; width:auto; object-fit:contain; }
.cst-logoplate .cs-wordmark{ font-family:var(--cst-display); font-weight:700; font-size:34px; color:hsl(var(--cst-navy)); }
.cst-tiles{ display:grid; grid-template-columns:repeat(3,1fr); gap:14px; }
.cst-tile{ background:hsl(230 40% 30% / .55); border:1px solid hsl(230 35% 50% / .35); border-radius:14px; padding:18px 16px; }
.cst-tile .n{ font-family:var(--cst-display); font-size:30px; font-weight:700; line-height:1; letter-spacing:-.02em; color:#fff; }
.cst-tile .l{ font-size:13px; color:hsl(220 26% 80%); margin-top:7px; line-height:1.35; }
/* generated-page hero stat (single highlighted metric) */
.cst-herostat{ background:hsl(230 40% 30% / .55); border:1px solid hsl(230 35% 50% / .35); border-radius:14px; padding:20px 22px; }
.cst-herostat .n{ font-family:var(--cst-display); font-size:42px; font-weight:700; line-height:1; letter-spacing:-.02em; color:hsl(152 60% 64%); }
.cst-herostat .l{ font-size:14px; color:hsl(220 26% 82%); margin-top:8px; }
/* interview-style sub-question inside prose */
.cst-subq{ font-family:var(--cst-display); font-size:18px; font-weight:600; color:hsl(var(--cst-navy)); margin:4px 0 -4px; }

/* ---------- Generic section ---------- */
.cst-sec{ padding:80px 0; }
.cst-sec.tint{ background:hsl(var(--cst-tint)); }
.cst-eyebrow{ font-size:13px; font-weight:700; letter-spacing:.14em; text-transform:uppercase;
  color:hsl(263 60% 52%); margin:0 0 16px; }
.cst-h2{ font-family:var(--cst-display); font-size:34px; font-weight:700; letter-spacing:-.02em;
  color:hsl(var(--cst-ink)); margin:0 0 22px; }
.cst-prose{ font-size:18px; line-height:1.7; color:hsl(222 22% 30%); max-width:62ch; }
.cst-prose p{ font-size:18px; margin:0 0 18px; }
.cst-prose p:last-child{ margin-bottom:0; }

/* background: split */
.cst-bg-grid{ display:grid; grid-template-columns:300px 1fr; gap:56px; align-items:start; }
@media (max-width:820px){ .cst-bg-grid{ grid-template-columns:1fr; gap:28px; } }

/* ---------- Challenge / Solution two-column ---------- */
.cst-cs-grid{ display:grid; grid-template-columns:340px 1fr; gap:56px; align-items:start; }
.cst-cs-grid.no-aside{ grid-template-columns:1fr; max-width:760px; }
@media (max-width:900px){ .cst-cs-grid{ grid-template-columns:1fr; gap:32px; } }
.cst-aside{ background:#fff; border:1px solid hsl(var(--cst-line)); border-radius:18px; padding:28px 26px;
  position:sticky; top:96px; }
.cst-sec.tint .cst-aside{ background:#fff; }
.cst-aside h3{ font-family:var(--cst-display); font-size:15px; font-weight:700; letter-spacing:.04em; text-transform:uppercase;
  color:hsl(var(--cst-navy)); margin:0 0 16px; }
.cst-aside ul{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:14px; }
.cst-aside li{ position:relative; padding-left:30px; font-size:16px; line-height:1.55; color:hsl(222 20% 32%); }
.cst-aside li::before{ content:''; position:absolute; left:0; top:3px; width:18px; height:18px; border-radius:6px;
  background:hsl(var(--cst-navy) / .1) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23283c86' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6L9 17l-5-5'/%3E%3C/svg%3E") center / 12px no-repeat; }
.cst-aside.solve li::before{ background-color:hsl(152 52% 40% / .14);
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23217a52' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6L9 17l-5-5'/%3E%3C/svg%3E"); }

/* pull quote */
.cst-quote{ margin:30px 0; padding:26px 30px; background:hsl(var(--cst-navy) / .04);
  border-left:3px solid hsl(var(--cst-violet)); border-radius:0 14px 14px 0; }
.cst-sec.tint .cst-quote{ background:#fff; }
.cst-quote p{ font-size:19px; line-height:1.55; color:hsl(222 30% 22%); margin:0 0 16px; font-style:italic; }
.cst-quote .by{ display:flex; align-items:center; gap:12px; }
.cst-quote .av{ width:42px; height:42px; border-radius:999px; background:hsl(var(--cst-navy));
  color:#fff; font-weight:700; font-size:15px; display:grid; place-items:center; font-family:var(--cst-display); }
.cst-quote .nm{ font-weight:700; color:hsl(var(--cst-ink)); font-size:15px; }
.cst-quote .rl{ font-size:14px; color:hsl(var(--cst-muted)); }

/* ---------- Results ---------- */
.cst-results-band{ color:#fff; padding:72px 0;
  background:
    radial-gradient(110% 130% at 84% -20%, hsl(219 92% 58% / .26) 0%, transparent 50%),
    linear-gradient(162deg, hsl(var(--cst-navy)) 0%, hsl(var(--cst-navy-edge)) 100%); }
.cst-results-band .cst-eyebrow{ color:hsl(263 82% 84%); }
.cst-results-band .cst-h2{ color:#fff; }
.cst-bigmetrics{ display:grid; grid-template-columns:repeat(3,1fr); gap:24px; margin:0 0 48px; }
@media (max-width:760px){ .cst-bigmetrics{ grid-template-columns:1fr; } }
.cst-bigmetric{ border-top:2px solid hsl(263 75% 64% / .6); padding-top:18px; }
.cst-bigmetric .n{ font-family:var(--cst-display); font-size:56px; font-weight:700; line-height:.95; letter-spacing:-.03em;
  color:hsl(152 60% 62%); }
.cst-bigmetric .l{ font-size:16px; color:hsl(220 28% 84%); margin-top:10px; }
.cst-res-cols{ display:grid; grid-template-columns:1fr 1fr; gap:24px 44px; align-items:start; }
@media (max-width:820px){ .cst-res-cols{ grid-template-columns:1fr; gap:0; } }
.cst-res-cols .cst-prose{ color:hsl(220 26% 86%); }
.cst-res-quote{ margin:0; padding:22px 26px; background:hsl(230 40% 32% / .5);
  border:1px solid hsl(230 35% 50% / .35); border-radius:14px; align-self:start; }
/* desktop: quote cards sit side by side, aligned */
.r-quoteL{ grid-column:1; grid-row:1; }
.r-quoteR{ grid-column:2; grid-row:1; }
@media (max-width:820px){
  .cst-res-cols > *{ grid-column:1 !important; grid-row:auto !important; }
  .r-quoteL{ order:1; margin-bottom:28px; }
  .r-quoteR{ order:2; }
}

/* data-driven results: prose + quote grid */
.cst-res-prose{ color:hsl(220 26% 86%); max-width:70ch; margin-bottom:34px; }
.cst-res-quotes{ display:grid; grid-template-columns:1fr; gap:24px; }
.cst-res-quotes.two{ grid-template-columns:1fr 1fr; }
@media (max-width:820px){ .cst-res-quotes.two{ grid-template-columns:1fr; } }
.cst-res-band-narrow .cst-bigmetrics{ margin-bottom:40px; }
.cst-res-quote p{ font-style:italic; font-size:17px; line-height:1.55; color:#fff; margin:0 0 14px; }
.cst-res-quote .by{ display:flex; align-items:center; gap:12px; }
.cst-res-quote .av{ width:40px; height:40px; border-radius:999px; background:hsl(263 70% 62%); color:#fff;
  font-weight:700; display:grid; place-items:center; font-family:var(--cst-display); font-size:14px; }
.cst-res-quote .nm{ font-weight:700; font-size:14px; }
.cst-res-quote .rl{ font-size:14px; color:hsl(220 26% 80%); }

/* ratings */
.cst-ratings{ display:grid; grid-template-columns:repeat(4,1fr); gap:20px; margin-top:48px;
  padding-top:40px; border-top:1px solid hsl(230 35% 50% / .35); }
@media (max-width:760px){ .cst-ratings{ grid-template-columns:repeat(2,1fr); gap:24px; } }
.cst-rating{ display:flex; align-items:center; gap:14px; }
.cst-rating .circle{ width:52px; height:52px; border-radius:999px; flex:0 0 auto; display:grid; place-items:center;
  font-family:var(--cst-display); font-weight:700; font-size:18px; color:#fff;
  background:hsl(263 70% 60%); }
.cst-rating .t{ font-size:14px; font-weight:700; letter-spacing:.04em; text-transform:uppercase; }
.cst-rating .d{ font-size:13px; color:hsl(220 26% 80%); margin-top:3px; letter-spacing:.03em; }

/* ---------- Closing CTA ---------- */
.cst-cta{ padding:84px 0; text-align:center; background:hsl(var(--cst-tint)); }
.cst-cta h2{ font-family:var(--cst-display); font-size:clamp(30px,3.4vw,44px); font-weight:700; letter-spacing:-.02em;
  color:hsl(var(--cst-ink)); margin:0 0 16px; }
.cst-cta p{ font-size:18px; color:hsl(var(--cst-muted)); max-width:48ch; margin:0 auto 28px; }
.cst-back{ display:inline-flex; align-items:center; gap:8px; margin-top:34px; font-size:15px; font-weight:600;
  color:hsl(var(--cst-navy)); text-decoration:none; }
.cst-back:hover{ text-decoration:underline; }

/* ---------- Data-driven additions ---------- */
/* interview question subheads in challenge / solution / results prose */
.cst-qa-q{ font-family:var(--cst-display); font-size:18px; font-weight:600; letter-spacing:-.01em;
  color:hsl(var(--cst-ink)); margin:26px 0 10px; line-height:1.35; }
.cst-qa-q:first-child{ margin-top:0; }
.cst-prose .cst-qa-q + p{ margin-top:0; }
.cst-results-band .cst-qa-q{ color:#fff; }
/* single headline metric tile in hero */
.cst-tile.feature{ background:hsl(152 52% 40% / .16); border-color:hsl(152 52% 50% / .4); }
.cst-tile.feature .n{ color:hsl(152 60% 64%); font-size:38px; }
.cst-tiles:has(.feature){ grid-template-columns:1fr; }
/* results prose questions stay readable on navy */
.cst-res-prose .cst-qa-q{ color:#fff; }
.cst-res-prose p{ color:hsl(220 26% 86%); }
/* empty aside placeholder collapses instead of reserving a column */
.cst-cs-grid > div:empty{ display:none; }
.cst-cs-grid:has(> div:empty:first-child){ grid-template-columns:1fr; max-width:780px; }
/* not-found state */
.cst-notfound{ max-width:640px; margin:0 auto; padding:160px 24px 120px; text-align:center; }
.cst-notfound h1{ font-family:var(--cst-display); font-size:40px; font-weight:700; color:hsl(var(--cst-ink)); margin:0 0 14px; }
.cst-notfound p{ font-size:18px; color:hsl(var(--cst-muted)); margin:0 0 28px; }