/* Recruiter-first case study layout (.cs-page).
   Leads with the outcome, then a problem / role / result strip,
   highlight numbers, a visual build sequence, and details last. */

.cs-page {
  --cs-accent: var(--fg);
}

/* Intro */
.cs-intro {
  max-width: 980px;
}

.cs-eyebrow {
  margin: 0 0 20px;
  color: var(--cs-accent);
  font: 700 14px/1.4 var(--font);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
}

.project-detail .cs-page .cs-intro h1 {
  margin: 0;
  color: var(--fg);
  font: 800 clamp(38px, 6.4vw, 84px)/1.02 var(--font);
  letter-spacing: -0.03em;
  text-transform: none;
}

.cs-lead {
  max-width: 760px;
  margin: 28px 0 0;
  color: var(--text-2);
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.55;
}

.cs-facts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin: 44px 0 0;
  border: 1px solid var(--line);
  background: var(--line);
}

.cs-facts div {
  padding: 18px 20px;
  background: var(--bg);
}

.cs-facts dt {
  margin-bottom: 6px;
  color: var(--muted);
  font: 700 12px/1 var(--font);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
}

.cs-facts dd {
  margin: 0;
  color: var(--fg);
  font-size: 16px;
  line-height: 1.4;
}

/* Hero */
.cs-hero {
  margin: 48px 0 0;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel);
}

.cs-hero img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  object-position: center 30%;
}

/* Charts and drawings: show the whole image on a light ground */
.cs-hero--contain img,
.cs-steps--contain img {
  object-fit: contain;
  background: #f4f4f4;
}

/* A page's original hero (diagram or video) placed in the hero slot */
.project-detail .cs-page .cs-hero--legacy > * {
  margin: 0;
  border: 0;
}

/* Problem / what I did / result */
.cs-story {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: 1px 0 0;
  border: 1px solid var(--line);
  border-top: 0;
  background: var(--line);
}

.cs-story article {
  padding: 28px 26px 30px;
  background: var(--panel);
}

.cs-story article p:last-child {
  margin: 0;
  color: var(--fg);
  font-size: 17px;
  line-height: 1.55;
}

.cs-label {
  margin: 0 0 12px;
  color: var(--cs-accent);
  font: 700 13px/1 var(--font);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
}

/* Highlight numbers */
.cs-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
  margin: 72px 0 0;
  padding: 40px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.cs-stats strong {
  display: block;
  color: var(--fg);
  font: 800 clamp(44px, 6vw, 76px)/1 var(--font);
  letter-spacing: -0.03em;
}

.cs-stats span {
  display: block;
  margin-top: 10px;
  color: var(--text-2);
  font-size: 15px;
  line-height: 1.4;
}

.cs-note {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 14px;
}

/* Sections */
.cs-section {
  margin-top: clamp(72px, 9vw, 120px);
}

.project-detail .cs-page .cs-section h2 {
  margin: 0 0 28px;
  color: var(--fg);
  font: 800 clamp(28px, 3.6vw, 44px)/1.1 var(--font);
  letter-spacing: -0.02em;
  text-transform: none;
}

.cs-section-lead {
  max-width: 760px;
  margin: -8px 0 28px;
  color: var(--text-2);
  font-size: 18px;
  line-height: 1.6;
}

.cs-compare figure,
.cs-gallery figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel);
}

.cs-compare figure img,
.cs-gallery figure img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.cs-compare figcaption,
.cs-gallery figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  color: var(--text-2);
  font-size: 15px;
}

/* Before / after */
.cs-compare {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.cs-compare figcaption span {
  margin-right: 8px;
  color: var(--cs-accent);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* Build steps */
.cs-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.cs-steps li {
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel);
}

.cs-steps img {
  display: block;
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
}

.cs-steps div {
  padding: 20px 20px 24px;
}

.cs-steps img.cs-focus-top {
  object-position: center 10%;
}

.cs-step-num {
  color: var(--cs-accent);
  font: 700 13px/1 var(--font);
  letter-spacing: var(--tracking-label);
}

.project-detail .cs-page .cs-steps h3 {
  margin: 10px 0 8px;
  color: var(--fg);
  font: 800 24px/1.1 var(--font);
  text-transform: none;
}

.cs-steps p {
  margin: 0;
  color: var(--text-2);
  font-size: 15px;
  line-height: 1.55;
}

.cs-steps--three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

/* Explainer diagram */
.cs-diagram {
  margin: 0 0 18px;
  padding: clamp(16px, 3vw, 32px);
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--fg);
}

.cs-diagram svg {
  display: block;
  width: 100%;
  height: auto;
}

.cs-diagram figcaption {
  margin-top: 14px;
  color: var(--text-2);
  font-size: 15px;
}

.cs-facts--spaced {
  margin-top: 18px;
}

/* Skills */
.cs-skills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.cs-skills li {
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--fg);
  font-size: 15px;
}

/* Gallery */
.cs-gallery {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.cs-gallery__wide {
  grid-column: 1 / -1;
}

.cs-page .cs-gallery__wide img {
  aspect-ratio: 16 / 9;
}

.cs-page .cs-figure--diagram img {
  object-fit: contain;
  background: #f4f4f4;
}

/* Collapsible engineering details */
.cs-details {
  margin-top: clamp(72px, 9vw, 120px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.cs-details summary {
  padding: 26px 0;
  color: var(--fg);
  cursor: pointer;
  font: 800 clamp(22px, 2.6vw, 30px)/1.2 var(--font);
  list-style: none;
}

.cs-details summary::-webkit-details-marker {
  display: none;
}

.cs-details summary::after {
  float: right;
  color: var(--cs-accent);
  content: "+";
}

.cs-details[open] summary::after {
  content: "\2212";
}

.cs-details__body {
  padding-bottom: 32px;
  color: var(--text-2);
  font-size: 17px;
  line-height: 1.6;
}

.cs-details__body ul {
  margin: 0 0 28px;
  padding-left: 20px;
}

.cs-details__body li + li {
  margin-top: 8px;
}

.cs-details__body strong {
  color: var(--fg);
}

.cs-details__body > p {
  margin: 28px 0 0;
}

/* The page's original write-up, kept intact inside the details section */
.cs-details__body > .fea-section:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

/* Next / contact */
.cs-next {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 72px;
}

.cs-next a {
  display: block;
  padding: 28px;
  border: 1px solid var(--line);
  color: var(--fg);
  font: 800 clamp(20px, 2.4vw, 28px)/1.25 var(--font);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.cs-next a:hover,
.cs-next a:focus-visible {
  border-color: var(--cs-accent);
  background: var(--panel);
}

.cs-next span {
  display: block;
  margin-bottom: 10px;
  color: var(--muted);
  font: 700 12px/1 var(--font);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
}

@media (max-width: 900px) {
  .cs-facts,
  .cs-stats,
  .cs-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .cs-steps--three {
    grid-template-columns: 1fr;
  }

  .cs-story {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .cs-facts,
  .cs-compare,
  .cs-steps,
  .cs-gallery,
  .cs-next {
    grid-template-columns: 1fr;
  }

  .cs-stats {
    gap: 28px 18px;
  }
}