/* ============================================
   CASE STUDY PAGE LAYOUT
   ============================================ */

/* Content column — centered narrow text */
.cs-content {
  width: 92%;
  max-width: var(--content-width);
  margin-inline: auto;
}

/* Wide images — slightly wider than text */
.cs-wide {
  width: 100%;
  max-width: var(--wide-width);
  margin-inline: auto;
}

/* Full bleed (edge to edge) */
.cs-full {
  width: 100%;
}

/* ============================================
   PROJECT HERO
   ============================================ */
.cs-hero {
  padding-top: 48px;
  padding-bottom: var(--space-section);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-section);
}

.cs-hero__eyebrow {
  font-size: var(--text-label);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 20px;
}

.cs-hero__title {
  font-family: var(--font-display);
  font-size: var(--text-h1);
  font-weight: 400;
  letter-spacing: 0.08em;
  line-height: 1.2;
  margin-bottom: 16px;
  max-width: 800px;
}

.cs-hero__tagline {
  font-size: clamp(18px, 2.5vw, 22px);
  font-weight: 400;
  color: var(--color-text-muted);
  max-width: 640px;
  margin-bottom: 32px;
  line-height: 1.5;
}

.cs-hero__meta {
  display: flex;
  gap: 8px;
  font-size: var(--text-small);
  color: var(--color-text-muted);
  flex-wrap: wrap;
}

.cs-hero__meta span + span::before {
  content: '·';
  margin: 0 4px;
}

.cs-hero__image {
  width: 100%;
  max-height: 560px;
  object-fit: cover;
  object-position: top;
  border-radius: 4px;
  margin-top: 48px;
}

/* The prototype video IS the hero: a poster with a play button until the
   visitor clicks (preload="none", so nothing downloads before then). */
.cs-hero__player {
  position: relative;
  margin-top: 48px;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  line-height: 0;
  background: var(--color-surface);
}

.cs-hero__video {
  width: 100%;
  display: block;
}

.cs-hero__play {
  position: absolute;
  inset: 0;
  margin: auto;
  width: 84px;
  height: 84px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: 50%;
  background: rgba(28, 25, 22, 0.55);
  color: #fff;
  cursor: pointer;
  transition: background 200ms ease, transform 200ms ease;
}

.cs-hero__play:hover,
.cs-hero__play:focus-visible {
  background: rgba(28, 25, 22, 0.72);
  transform: scale(1.06);
}

.cs-hero__play svg {
  width: 34px;
  height: 34px;
  margin-left: 4px; /* optical centring of the triangle */
  fill: currentColor;
}

.cs-hero__player.is-playing .cs-hero__play {
  display: none;
}

/* ============================================
   TL;DR STATS BAR
   ============================================ */
.cs-tldr {
  background: var(--color-surface);
  border-radius: 8px;
  padding: 28px 32px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: var(--space-section);
}

@media (min-width: 768px) {
  .cs-tldr {
    grid-template-columns: repeat(4, 1fr);
  }
}

.cs-tldr__label {
  font-size: var(--text-label);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 6px;
}

.cs-tldr__value {
  font-size: var(--text-small);
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.4;
}

/* ============================================
   CASE STUDY SECTIONS
   ============================================ */
.cs-section {
  margin-bottom: var(--space-section);
}

.cs-section__heading {
  font-size: var(--text-label);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
}

.cs-section p {
  font-size: var(--text-body);
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: 20px;
}

.cs-section p:last-child {
  margin-bottom: 0;
}

/* Two-up image grid */
.cs-two-up {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  max-width: var(--wide-width);
  margin-inline: auto;
  margin-top: 32px;
  margin-bottom: 8px;
}

@media (max-width: 600px) {
  .cs-two-up { grid-template-columns: 1fr; }
}

.cs-two-up .cs-image {
  margin: 0;
}

.cs-two-up-caption {
  max-width: var(--wide-width);
  margin-inline: auto;
  font-size: var(--text-small);
  color: var(--color-text-muted);
  text-align: center;
  margin-bottom: 32px;
}

/* Before / After comparison wrapper */
.cs-two-up--compare {
  align-items: start;
}

.cs-compare {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.cs-compare__label {
  font-size: var(--text-label);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  padding-bottom: 6px;
  border-bottom: 1px solid var(--color-border);
}

.cs-compare__label--after {
  color: var(--color-text);
}

.cs-compare .cs-image {
  margin: 0;
  width: 100%;
  height: auto;
}

/* Callout / key insight block */
.cs-callout {
  border-left: 2px solid var(--color-text);
  padding: 20px 28px;
  margin: 40px 0;
  background: var(--color-surface);
  border-radius: 0 4px 4px 0;
}

.cs-callout p {
  font-size: clamp(18px, 2.2vw, 21px);
  font-style: italic;
  line-height: 1.6;
  margin: 0 !important;
  color: var(--color-text);
}

/* Pull quote */
.cs-pullquote {
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 300;
  line-height: 1.5;
  color: var(--color-text);
  border-left: 2px solid var(--color-text);
  padding-left: 24px;
  margin: 40px 0;
}

/* Screenshot in process section */
.cs-image {
  width: 100%;
  border-radius: 4px;
  border: 1px solid var(--color-border);
  margin: 32px 0;
}

.cs-image-caption {
  font-size: var(--text-small);
  color: var(--color-text-muted);
  margin-top: -20px;
  margin-bottom: 32px;
  text-align: center;
}

/* Key decisions list */
.cs-decisions {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.cs-decision__title {
  font-family: var(--font-display);
  font-size: var(--text-h3);
  font-weight: 400;
  letter-spacing: 0.05em;
  margin-bottom: 10px;
}

.cs-decision__body {
  font-size: var(--text-body);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ============================================
   PROTOTYPE EMBED
   ============================================ */
.cs-prototype {
  margin: 40px 0;
}

.cs-prototype__label {
  font-size: var(--text-label);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

.cs-prototype video,
.cs-prototype iframe {
  width: 100%;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  display: block;
}

.cs-prototype video {
  max-height: 600px;
}

.cs-prototype iframe {
  height: 405px; /* 16:9 at 720px wide */
}

@media (min-width: 768px) {
  .cs-prototype iframe {
    height: 450px;
  }
}

/* ============================================
   PROJECT NAVIGATION (prev/next)
   ============================================ */
.cs-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 48px;
  border-top: 1px solid var(--color-border);
  gap: 16px;
  flex-wrap: wrap;
}

.cs-nav__link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: opacity 200ms ease;
}

.cs-nav__link:hover {
  opacity: 0.6;
}

.cs-nav__direction {
  font-size: var(--text-label);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.cs-nav__title {
  font-family: var(--font-display);
  font-size: var(--text-small);
  font-weight: 400;
  letter-spacing: 0.06em;
}

.cs-nav__link--next {
  text-align: right;
}