/* ==========================================================================
   Case Study page styles
   Depends on tokens + cursor + floating-nav from styles.css
   ========================================================================== */

/* ---------- Layout ---------- */
.cs-page {
  max-width: 1360px;
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.cs-eyebrow {
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--matcha);
  margin: 0 0 var(--s-3);
  display: inline-block;
}

.cs-heading {
  font-family: 'Playfair Display', 'Times New Roman', serif;
  font-weight: 500;
  font-size: clamp(32px, 4.2vw, 56px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 0 0 var(--s-6);
}

.cs-heading--center {
  text-align: center;
}

/* ---------- Hero ---------- */
.cs-hero {
  padding: 140px 0 120px;
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(40px, 6vw, 96px);
  align-items: center;
}

.cs-hero__meta { min-width: 0; }

.cs-tags {
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink);
  opacity: 0.75;
  margin: 0 0 var(--s-4);
}

.cs-hero__title {
  font-family: 'Playfair Display', 'Times New Roman', serif;
  font-weight: 500;
  font-size: clamp(40px, 4.2vw, 58px);
  line-height: 1.05;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin: 0 0 var(--s-5);
}

.cs-hero__callout {
  font-family: 'Playfair Display', 'Times New Roman', serif;
  font-style: italic;
  font-weight: 400;
  font-size: clamp(20px, 2vw, 26px);
  line-height: 1.4;
  color: var(--matcha);
  border-left: 3px solid var(--matcha);
  padding: 4px 0 4px 20px;
  margin: 0 0 var(--s-6);
  max-width: 44ch;
  quotes: none;
}

.cs-hero__details {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--s-3) var(--s-5);
  margin: 0 0 var(--s-5);
  padding: 0;
}

.cs-hero__details > div {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.cs-hero__details dt {
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink);
  opacity: 0.55;
  margin: 0;
}

.cs-hero__details dd {
  font-family: 'Inter', sans-serif;
  font-weight: 500;
  font-size: 15px;
  color: var(--ink);
  margin: 0;
}

.cs-live-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.02em;
  color: var(--matcha);
  padding-bottom: 4px;
  border-bottom: 1.5px solid var(--matcha);
  transition: gap 0.2s ease, opacity 0.2s ease;
}
.cs-live-link:hover { gap: 12px; opacity: 0.8; }

/* ---------- Mockup frame (image placeholder) ---------- */
.cs-mockup {
  position: relative;
  width: 100%;
  border-radius: 16px;
  overflow: hidden;
  background: var(--card);
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 30px 60px -30px rgba(0,0,0,0.2), 0 6px 20px -8px rgba(0,0,0,0.08);
}
.cs-mockup img {
  width: 100%;
  height: auto;
  display: block;
  position: relative;
  z-index: 1;
}
.cs-mockup::before {
  content: attr(data-placeholder);
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(26,26,26,0.4);
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-align: center;
  padding: 20px;
  z-index: 0;
}
.cs-mockup--large { min-height: 480px; }
.cs-mockup--phone {
  max-width: 320px;
  margin: 0 auto;
  min-height: 560px;
  background: transparent;
  box-shadow: none;
}
.cs-mockup--phone::before { color: rgba(26,26,26,0.35); }
.cs-mockup--flush { background: var(--card); box-shadow: none; }
.cs-mockup--flush img { border-radius: 12px; box-shadow: 0 30px 60px -30px rgba(0,0,0,0.2); }
/* When an image inside flush loads, hide the placeholder background */
.cs-mockup--flush:has(img[src]:not([src=""])) { background: transparent; }

/* ---------- Body layout with sticky side nav ---------- */
.cs-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 200px;
  gap: clamp(40px, 5vw, 80px);
  padding: 60px 0 120px;
}

.cs-content { min-width: 0; }
.cs-content > section {
  padding: 80px 0;
  scroll-margin-top: 80px;
}
.cs-content > section:first-child { padding-top: 0; }

.cs-sidenav {
  position: sticky;
  top: 32px;
  align-self: start;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-left: 24px;
  border-left: 1px solid rgba(0,0,0,0.1);
}
.cs-sidenav__link {
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink);
  opacity: 0.5;
  padding: 8px 0;
  transition: opacity 0.2s ease, color 0.2s ease, padding-left 0.2s ease;
  position: relative;
}
.cs-sidenav__link:hover { opacity: 0.85; }
.cs-sidenav__link.is-active {
  color: var(--matcha);
  opacity: 1;
  font-weight: 600;
}
.cs-sidenav__link.is-active::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 50%;
  transform: translateY(-50%);
  width: 2px;
  height: 20px;
  background: var(--matcha);
  border-radius: 2px;
}

/* ---------- Overview: 3 stat/context columns ---------- */
.cs-overview__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(24px, 3vw, 48px);
}
.cs-overview__item {
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
}
.cs-overview__num {
  font-family: 'Playfair Display', serif;
  font-weight: 500;
  font-size: 48px;
  line-height: 1;
  color: var(--matcha);
  margin: 0;
}
.cs-overview__label {
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink);
  margin: 0;
}
.cs-overview__body {
  font-family: 'Inter', sans-serif;
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink);
  opacity: 0.85;
  margin: 0;
}

/* ---------- Cards (challenge + goals + results) ---------- */
.cs-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(20px, 2.4vw, 32px);
}

.cs-card {
  position: relative;
  background: #FAF8F4;
  border: 1px solid rgba(0,0,0,0.08);
  border-radius: 16px;
  padding: clamp(24px, 2.4vw, 36px);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
}
.cs-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--matcha);
}
.cs-card__num {
  font-family: 'Playfair Display', serif;
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0.16em;
  color: var(--matcha);
  opacity: 0.85;
  margin: 0;
}
.cs-card__icon {
  width: 40px;
  height: 40px;
  color: var(--matcha);
  opacity: 0.85;
}
.cs-card__title {
  font-family: 'Playfair Display', serif;
  font-weight: 500;
  font-size: clamp(17px, 1.35vw, 19px);
  line-height: 1.2;
  color: var(--ink);
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.cs-card__body {
  font-family: 'Inter', sans-serif;
  font-size: 15px;
  line-height: 1.55;
  color: var(--ink);
  opacity: 0.8;
  margin: 0;
}
.cs-card__insight {
  font-family: 'Playfair Display', serif;
  font-style: italic;
  font-size: 15px;
  line-height: 1.4;
  color: var(--matcha);
  border-top: 1px solid rgba(0,0,0,0.08);
  padding-top: var(--s-2);
  margin: auto 0 0;
}

/* Goal cards: minimal, no top accent, same background as challenge cards */
.cs-goal {
  padding: clamp(20px, 2vw, 28px);
  background: #FAF8F4;
  border: 1px solid rgba(0,0,0,0.08);
  border-radius: 12px;
}
.cs-goal::before { display: none; }
.cs-goal .cs-card__title { font-size: 22px; white-space: normal; overflow: visible; text-overflow: clip; }

/* Result cards: icon + statement + supporting, same background as challenge cards */
.cs-result {
  padding: clamp(20px, 2vw, 28px);
  background: #FAF8F4;
  border: 1px solid rgba(0,0,0,0.08);
  border-radius: 12px;
}
.cs-result::before { display: none; }
.cs-result__icon {
  font-size: 32px;
  line-height: 1;
  margin: 0;
}
.cs-result__title {
  font-family: 'Playfair Display', serif;
  font-weight: 500;
  font-size: 20px;
  line-height: 1.25;
  color: var(--ink);
  margin: 0;
}
.cs-result__body {
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  line-height: 1.55;
  color: var(--ink);
  opacity: 0.8;
  margin: 0;
}

/* ---------- Process steps ---------- */
.cs-process { display: flex; flex-direction: column; gap: clamp(64px, 8vw, 120px); }
.cs-process__step {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: center;
}
.cs-process__step:nth-child(even) .cs-process__meta { order: 2; }
.cs-process__step:nth-child(even) .cs-process__mockup-wrap { order: 1; }

.cs-process__num {
  font-family: 'Playfair Display', serif;
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0.18em;
  color: var(--matcha);
  margin: 0 0 var(--s-2);
}
.cs-process__title {
  font-family: 'Playfair Display', serif;
  font-weight: 500;
  font-size: clamp(24px, 2.4vw, 32px);
  line-height: 1.2;
  color: var(--ink);
  margin: 0 0 var(--s-3);
}
.cs-process__body {
  font-family: 'Inter', sans-serif;
  font-size: 15px;
  line-height: 1.65;
  color: var(--ink);
  opacity: 0.85;
  margin: 0;
}

/* ---------- Solution 2-col ---------- */
#solution .cs-heading { margin-bottom: 32px; }

.cs-solution__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
  gap: clamp(40px, 5vw, 80px);
  align-items: center;
  margin-bottom: var(--s-10);
}
.cs-solution__list {
  list-style: none;
  padding: 0;
  margin: var(--s-4) 0 0;
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
}
.cs-solution__list li {
  position: relative;
  padding-left: 28px;
  font-family: 'Inter', sans-serif;
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink);
  opacity: 0.9;
}
.cs-solution__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 16px;
  height: 2px;
  background: var(--matcha);
}
.cs-solution__lead {
  font-family: 'Playfair Display', serif;
  font-style: italic;
  font-size: clamp(18px, 1.8vw, 22px);
  line-height: 1.45;
  color: var(--ink);
  margin: 0;
}

/* ---------- Reflection ---------- */
.cs-reflection__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: clamp(40px, 6vw, 96px);
  align-items: start;
}
.cs-reflection__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
}
.cs-reflection__list li {
  font-family: 'Playfair Display', serif;
  font-style: italic;
  font-size: clamp(18px, 1.8vw, 22px);
  line-height: 1.5;
  color: var(--ink);
  padding-left: 24px;
  border-left: 2px solid var(--matcha);
}
.cs-reflection__decoration {
  font-family: 'Playfair Display', serif;
  font-size: clamp(180px, 22vw, 320px);
  line-height: 0.8;
  color: var(--matcha);
  opacity: 0.3;
  text-align: center;
  user-select: none;
}

.cs-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: var(--s-10);
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.02em;
  color: var(--matcha);
  padding-bottom: 4px;
  border-bottom: 1.5px solid var(--matcha);
  transition: gap 0.2s ease, opacity 0.2s ease;
}
.cs-back:hover { gap: 12px; opacity: 0.8; }

/* ---------- Fade-in on scroll ---------- */
.cs-fade {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
  will-change: opacity, transform;
}
.cs-fade.is-visible {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  .cs-fade { opacity: 1; transform: none; transition: none; }
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 1100px) {
  .cs-body { grid-template-columns: minmax(0, 1fr) 180px; gap: 48px; }
}

@media (max-width: 900px) {
  .cs-hero {
    padding: 100px 0 80px;
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .cs-body {
    grid-template-columns: 1fr;
    gap: 0;
    padding: 40px 0 80px;
  }
  .cs-sidenav {
    position: sticky;
    top: 12px;
    z-index: 20;
    flex-direction: row;
    gap: 4px;
    padding: 8px;
    margin: 0 calc(var(--gutter) * -1) 32px;
    padding-left: var(--gutter);
    padding-right: var(--gutter);
    border-left: none;
    overflow-x: auto;
    background: rgba(245, 240, 232, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(0,0,0,0.08);
    scrollbar-width: none;
  }
  .cs-sidenav::-webkit-scrollbar { display: none; }
  .cs-sidenav__link {
    padding: 8px 14px;
    border-radius: 999px;
    white-space: nowrap;
    background: transparent;
    flex-shrink: 0;
  }
  .cs-sidenav__link.is-active {
    background: var(--matcha);
    color: #fff;
  }
  .cs-sidenav__link.is-active::before { display: none; }

  .cs-content > section { padding: 60px 0; scroll-margin-top: 72px; }

  .cs-overview__grid,
  .cs-cards { grid-template-columns: 1fr; }

  .cs-process__step {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .cs-process__step:nth-child(even) .cs-process__meta { order: 1; }
  .cs-process__step:nth-child(even) .cs-process__mockup-wrap { order: 2; }

  .cs-solution__grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .cs-solution__mockup-wrap { max-width: 320px; margin: 0 auto; }

  .cs-reflection__grid { grid-template-columns: 1fr; gap: 40px; }
  .cs-reflection__decoration { font-size: 200px; }

  .cs-hero__title { font-size: clamp(36px, 8vw, 56px); }
  .cs-mockup { min-height: 220px; }
  .cs-mockup--large { min-height: 320px; }
}

@media (max-width: 720px) {
  .cs-hero { padding: 80px 0 60px; }
  .cs-content > section { padding: 48px 0; }
  .cs-hero__details {
    grid-template-columns: 1fr 1fr;
    gap: 16px 24px;
  }
}

@media (max-width: 480px) {
  .cs-page { padding: 0 24px; }
  .cs-hero { padding: 60px 0 48px; gap: 32px; }
  .cs-hero__title { font-size: 40px; }
  .cs-hero__callout { font-size: 18px; padding-left: 16px; }
  .cs-content > section { padding: 40px 0; }
  .cs-heading { font-size: 30px; margin-bottom: var(--s-4); }
  .cs-mockup { border-radius: 12px; }
  .cs-card { padding: 20px; }
  .cs-reflection__decoration { font-size: 140px; }
}

/* Hide the sticky side nav on tablet and mobile — floating bottom nav handles it below 1025px */
@media (max-width: 1024px) {
  .cs-sidenav,
  .side-nav,
  .case-nav,
  [class*="side-nav"],
  [class*="sticky-nav"] {
    display: none !important;
  }
}