/* ============================================================
   CASE-STUDY.CSS  —  shared styles for individual case studies
   Imports: main.css (design tokens, shared components)
============================================================ */


/* ── HERO ─────────────────────────────────────────────────── */
.cs-hero {
  min-height: 100svh;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 0 var(--s6) var(--s8);
  overflow: hidden;
  background: var(--bg);
}

/* full-bleed hero image */
.cs-hero-img {
  position: absolute; inset: 0; z-index: 0;
}
.cs-hero-img img {
  width: 100%; height: 100%; object-fit: cover;
  filter: grayscale(30%) brightness(.55);
  transition: filter 1.2s var(--e1);
}
.cs-hero:hover .cs-hero-img img {
  filter: grayscale(10%) brightness(.65);
}

/* gradient overlay */
.cs-hero::after {
  content: '';
  position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(
    to bottom,
    rgba(10,10,10,.15) 0%,
    rgba(10,10,10,.08) 40%,
    rgba(10,10,10,.82) 80%,
    var(--bg) 100%
  );
}
[data-theme="light"] .cs-hero::after {
  background: linear-gradient(
    to bottom,
    rgba(247,247,247,.1) 0%,
    rgba(247,247,247,.05) 40%,
    rgba(247,247,247,.85) 80%,
    var(--bg) 100%
  );
}

.cs-hero-inner {
  position: relative; z-index: 2;
}

/* breadcrumb */
.cs-bread {
  display: flex; align-items: center; gap: 8px;
  font-family: var(--fm); font-size: var(--xs);
  color: rgba(240,240,240,.85); letter-spacing: .12em;
  margin-bottom: var(--s6);
  opacity: 0; transform: translateY(12px);
}
.cs-bread.in { animation: fup .5s var(--e2) .2s forwards; }
.cs-bread a { color: rgba(240,240,240,.85); text-decoration: none; transition: color .2s; }
.cs-bread a:hover { color: rgba(240,240,240,1); }
.cs-bread-sep { opacity: .5; }

/* project title */
.cs-title {
  font-family: var(--fd); font-weight: 700;
  font-size: clamp(2rem, 11vw, 10rem);
  letter-spacing: -.06em; line-height: .88;
  text-transform: uppercase;
  color: var(--tx);
  margin-bottom: var(--s6);
}
.cs-title-clip { display: block; overflow: hidden; }
.cs-title-word {
  display: block;
  transform: translateY(110%); opacity: 0;
}
.cs-hero.in .cs-title-clip:nth-child(1) .cs-title-word {
  animation: revup .9s var(--e2) .3s forwards;
}
.cs-hero.in .cs-title-clip:nth-child(2) .cs-title-word {
  animation: revup .9s var(--e2) .46s forwards;
}

/*Back Button*/
/* Move "All projects" back button away from hero content */
/* FIX: clean small "All projects" button */
.case-nav-home {
  all: unset !important;

  position: fixed !important;
  left: clamp(1rem, 3vw, 2.75rem) !important;
  top: 6rem !important;
  z-index: 999 !important;

  width: auto !important;
  height: auto !important;
  min-width: unset !important;
  min-height: unset !important;
  max-width: max-content !important;

  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  gap: 0.5rem !important;

  padding: 0.75rem 1rem !important;
  border-radius: 999px !important;
  border: 1px solid rgba(255, 255, 255, 0.25) !important;

  background: rgba(12, 12, 12, 0.75) !important;
  color: rgba(255, 255, 255, 0.9) !important;
  backdrop-filter: blur(18px) !important;
  -webkit-backdrop-filter: blur(18px) !important;

  font-family: var(--fm, monospace) !important;
  font-size: 0.72rem !important;
  font-weight: 600 !important;
  line-height: 1 !important;
  letter-spacing: 0.08em !important;
  text-transform: uppercase !important;
  text-decoration: none !important;
  white-space: nowrap !important;

  cursor: pointer !important;

  transform: none !important;
  writing-mode: horizontal-tb !important;

  transition:
    transform 220ms ease,
    color 220ms ease,
    border-color 220ms ease,
    background 220ms ease !important;
}

.case-nav-home:hover {
  transform: translateY(-2px) !important;
  color: #fff !important;
  border-color: rgba(255, 255, 255, 0.45) !important;
  background: rgba(12, 12, 12, 0.88) !important;
}

.case-nav-home:focus-visible {
  outline: 2px solid rgba(255, 255, 255, 0.72) !important;
  outline-offset: 4px !important;
}

@media (max-width: 760px) {
  .case-nav-home {
    top: 5rem !important;
    left: 1rem !important;
    padding: 0.65rem 0.85rem !important;
    font-size: 0.66rem !important;
  }
}

/* Light mode variant */
[data-theme="light"] .case-nav-home {
  border-color: rgba(0, 0, 0, 0.15) !important;
  background: rgba(255, 255, 255, 0.85) !important;
  color: rgba(0, 0, 0, 0.85) !important;
}

[data-theme="light"] .case-nav-home:hover {
  border-color: rgba(0, 0, 0, 0.3) !important;
  color: rgba(0, 0, 0, 1) !important;
}

[data-theme="light"] .case-nav-home:focus-visible {
  outline-color: rgba(0, 0, 0, 0.5) !important;
}

/* hero meta row */
.cs-hero-meta {
  display: flex; align-items: flex-end;
  justify-content: space-between; gap: var(--s6);
  opacity: 0;
}
.cs-hero.in .cs-hero-meta { animation: fup .7s var(--e2) .9s forwards; }

.cs-hero-desc {
  font-size: var(--lg); color: rgba(240,240,240,.85);
  max-width: 52ch; line-height: 1.6;
  font-weight: 300; letter-spacing: -.01em;
}

.cs-hero-tags { display: flex; flex-wrap: wrap; gap: 8px; justify-content: flex-end; }
.cs-hero-tags .tag {
  border-color: rgba(240,240,240,.2);
  color: rgba(240,240,240,.55);
}

@media (max-width: 768px) {
  .cs-hero-meta { flex-direction: column; align-items: flex-start; }
  .cs-hero-tags { justify-content: flex-start; }
  .cs-title { font-size: clamp(3.5rem, 14vw, 7rem); }
}


/* ── OVERVIEW BAR ─────────────────────────────────────────── */
/* Accessible label/value pairs — screen reader friendly */
.cs-overview {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  border-bottom: 1px solid var(--bd);
  background: var(--bg2);
  padding: 0;
  gap: 0;
}
.cs-ov-i {
  flex: 1 1 0;
  min-width: 0;
  padding: var(--s3) var(--s5);
  border-right: 1px solid var(--bd);
  position: relative;
}
.cs-ov-i:last-child { border-right: none; }

/* Label — high contrast, readable in both themes */
.cs-ov-label {
  font-family: var(--fm); font-size: var(--xs);
  color: var(--txm); letter-spacing: .14em; text-transform: uppercase;
  white-space: nowrap; margin-bottom: 4px;
}

/* Value — primary text color, full contrast */
.cs-ov-val {
  font-family: var(--fd); font-size: var(--sm);
  font-weight: 700; letter-spacing: -.02em;
  color: var(--tx); line-height: 1.4;
  white-space: nowrap; overflow: hidden;
  text-overflow: ellipsis;
}

/* Screen-reader only label for each overview item */
.cs-ov-sr {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* Subtext under values — clearly visible but secondary */
.cs-ov-sub {
  font-family: var(--fm); font-size: 10px;
  color: var(--txm); letter-spacing: .06em;
  margin-top: 2px;
  opacity: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

@media(max-width:768px){
  .cs-overview{flex-direction:column;gap:0;padding:0}
  .cs-ov-i{padding:var(--s3) var(--s4);border-right:none;border-bottom:1px solid var(--bd);flex:none;width:100%}
  .cs-ov-i:last-child{border-bottom:none}
  .cs-ov-val{white-space:normal;text-overflow:unset}
}


/* ── BODY CONTENT LAYOUT ──────────────────────────────────── */
.cs-body {
  max-width: min(100% - 2rem, 1400px);
  margin: 0 auto;
  padding-bottom: clamp(3rem, 7vw, 6rem);
}

/* Inter-section spacing — each section gets a top margin so they don't collapse */
.sec + .sec {
  margin-top: clamp(3rem, 7vw, 6rem);
  padding-top: clamp(3rem, 7vw, 6rem);
  border-top: 1px solid var(--bd);
}

/* First research section has no top border */
#research {
  padding-top: clamp(3rem, 7vw, 6rem);
}

/* chapter heading */
.cs-ch {
  font-family: var(--fd); font-weight: 700;
  font-size: clamp(2rem, 4vw, 4.5rem);
  letter-spacing: -.05em; line-height: .95;
  text-transform: uppercase;
  margin-bottom: clamp(2rem, 4vw, 3.5rem);
}
.cs-ch em {
  font-style: normal; font-weight: 300;
  color: var(--txm); text-transform: none;
  letter-spacing: -.025em;
}

/* section number badge */
.cs-num {
  font-family: var(--fm); font-size: var(--xs);
  color: var(--txd); letter-spacing: .18em;
  text-transform: uppercase; display: block;
  margin-bottom: var(--s4);
}


/* ── INTRO / BRIEF ────────────────────────────────────────── */
.cs-intro-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: var(--s12);
  align-items: start;
}
@media (max-width: 900px) { .cs-intro-grid { grid-template-columns: 1fr; } }

.cs-intro-lead {
  font-family: var(--fd); font-size: clamp(1.5rem, 2.8vw, 2.8rem);
  font-weight: 300; letter-spacing: -.025em; line-height: 1.3;
  color: var(--tx);
}
.cs-intro-lead strong { font-weight: 700; }

.cs-intro-sidebar { display: flex; flex-direction: column; gap: var(--s6); }

.cs-sidebar-block { border-top: 1px solid var(--bd); padding-top: var(--s3); }
.cs-sidebar-label {
  font-family: var(--fm); font-size: var(--xs);
  color: var(--txd); letter-spacing: .14em; text-transform: uppercase;
  margin-bottom: var(--s2);
}
.cs-sidebar-val { font-size: var(--sm); color: var(--txm); line-height: 1.7; }
.cs-sidebar-val strong { color: var(--tx); font-weight: 500; }

.cs-sidebar-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: var(--s2); }


/* ── FULL-WIDTH MEDIA ─────────────────────────────────────── */
.cs-full-img {
  width: 100%; aspect-ratio: 16/7;
  overflow: hidden; position: relative; background: var(--bg3);
}
.cs-full-img img {
  width: 100%; height: 100%; object-fit: cover;
  filter: grayscale(15%);
  transition: filter .8s var(--e1), transform .8s var(--e1);
}
.cs-full-img:hover img { filter: grayscale(0); transform: scale(1.02); }

.cs-full-img-cap {
  padding: var(--s2) var(--s6);
  font-family: var(--fm); font-size: var(--xs);
  color: var(--txm); border-bottom: 1px solid var(--bd);
  background: var(--bg2);
  letter-spacing: .06em;
}


/* =====================================================
   Case Study Gallery — Feature / Middle Grid / Feature
   Top and bottom full-width, middle images clean 2-column
===================================================== */

.cs-gallery {
  width: min(100% - 2rem, 1500px) !important;
  margin: clamp(2.5rem, 6vw, 5rem) auto !important;
  display: grid !important;
  grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
  gap: clamp(1rem, 2vw, 1.5rem) !important;
  align-items: start !important;
}

.cs-section-caption {
  max-width: 760px !important;
  margin: clamp(1rem, 2vw, 1.5rem) 0 clamp(2.5rem, 5vw, 4rem) !important;

  font-size: clamp(1rem, 1.35vw, 1.25rem) !important;
  line-height: 1.6 !important;
  color: rgba(255, 255, 255, 0.68) !important;
  letter-spacing: -0.02em !important;
}

/* Reset all gallery items */
.cs-gallery-item {
margin: 0 !important;
  overflow: hidden !important;
  border-radius: clamp(1rem, 2vw, 1.5rem) !important;
  border: 1px solid var(--bd, rgba(255,255,255,.12)) !important;
  background: var(--bg2, #111) !important;
}

/* First image full-width */
.cs-gallery-item:first-child {
  grid-column: 1 / -1 !important;
}

/* Last image full-width */
.cs-gallery-item:last-child {
  grid-column: 1 / -1 !important;
}

/* Middle images stay in 2-column cards */
.cs-gallery-item:not(:first-child):not(:last-child) {
  grid-column: auto !important;
}

/* Image base */
.cs-gallery-item img {
  width: 100% !important;
  height: auto !important;
  display: block !important;
  object-fit: contain !important;
  transform: none !important;
}

/* Full-width top and bottom images: cinematic, taller */
.cs-gallery-item:first-child img,
.cs-gallery-item:last-child img {
  /* height: clamp(420px, 55vw, 760px) !important; */
  object-fit: cover !important;
}

/* Middle images: balanced cards */
.cs-gallery-item:not(:first-child):not(:last-child) img {
  height: clamp(280px, 32vw, 460px) !important;
  object-fit: cover !important;
}

/* Captions */
.cs-gallery-item figcaption,
.cs-img-cap {
  position: static !important;
  display: block !important;
  width: 100% !important;

  padding: 0.9rem 1rem 1rem !important;

  background: transparent !important;
  color: var(--muted, rgba(255, 255, 255, 0.62)) !important;

  font-size: 0.9rem !important;
  line-height: 1.5 !important;

  transform: none !important;
}

/* Mobile: all images stack cleanly */
@media (max-width: 760px) {
  .cs-gallery {
    width: min(100% - 1.25rem, 1500px) !important;
    grid-template-columns: 1fr !important;
    gap: 1rem !important;
  }

  .cs-gallery-item,
  .cs-gallery-item:first-child,
  .cs-gallery-item:last-child,
  .cs-gallery-item:not(:first-child):not(:last-child) {
    grid-column: 1 / -1 !important;
  }

  .cs-gallery-item:first-child img,
  .cs-gallery-item:last-child img,
  .cs-gallery-item:not(:first-child):not(:last-child) img {
    height: auto !important;
    object-fit: contain !important;
  }
}

/* ── PROCESS TIMELINE ─────────────────────────────────────── */
.cs-timeline { display: flex; flex-direction: column; gap: 0; }

.cs-tl-item {
  display: grid;
  grid-template-columns: 5rem 2px 1fr;
  gap: 0 var(--s5);
  padding-bottom: var(--s8);
}
.cs-tl-item:last-child { padding-bottom: 0; }

.cs-tl-num {
  font-family: var(--fm); font-size: var(--xs);
  color: var(--txd); letter-spacing: .1em;
  padding-top: 4px; text-align: right;
}
.cs-tl-line {
  position: relative;
}
.cs-tl-line::before {
  content: ''; position: absolute; top: 6px; left: 50%;
  transform: translateX(-50%);
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--tx); border: 1px solid var(--bg);
  box-shadow: 0 0 0 4px var(--bdm);
}
.cs-tl-line::after {
  content: ''; position: absolute;
  top: 18px; bottom: 0; left: 50%;
  transform: translateX(-50%);
  width: 1px; background: var(--bd);
}
.cs-tl-item:last-child .cs-tl-line::after { display: none; }

.cs-tl-content { padding-top: 0; }
.cs-tl-phase {
  font-family: var(--fm); font-size: var(--xs);
  color: var(--txm); letter-spacing: .14em; text-transform: uppercase;
  margin-bottom: var(--s2);
}
.cs-tl-head {
  font-family: var(--fd); font-weight: 700;
  font-size: clamp(1.4rem, 2.5vw, 2.2rem);
  letter-spacing: -.03em; margin-bottom: var(--s3);
  text-transform: uppercase;
}
.cs-tl-body { font-size: var(--sm); color: var(--txm); line-height: 1.85; }
.cs-tl-body strong { color: var(--tx); font-weight: 500; }

@media (max-width: 640px) {
  .cs-tl-item { grid-template-columns: 3rem 2px 1fr; gap: 0 var(--s3); }
}


/* ── SIDE-BY-SIDE COMPARISON ──────────────────────────────── */
.cs-compare {
  display: grid; grid-template-columns: 1fr 1fr; gap: 4px;
}
@media (max-width: 640px) { .cs-compare { grid-template-columns: 1fr; } }

.cs-compare-item { position: relative; overflow: hidden; }
.cs-compare-item img {
  width: 100%; display: block; object-fit: cover;
  filter: grayscale(20%);
  transition: filter .5s, transform .6s var(--e1);
}
.cs-compare-item:hover img { filter: grayscale(0); transform: scale(1.03); }

.cs-compare-label {
  position: absolute; top: var(--s3); left: var(--s3);
  font-family: var(--fm); font-size: var(--xs);
  color: rgba(240,240,240,.7); letter-spacing: .12em; text-transform: uppercase;
  background: rgba(10,10,10,.6); padding: 4px 10px;
  backdrop-filter: blur(6px);
}


/* ── RESULTS / METRICS ────────────────────────────────────── */
.cs-metrics {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 1px; background: var(--bd);
}
@media (max-width: 768px) { .cs-metrics { grid-template-columns: 1fr 1fr; } }
@media (max-width: 420px) { .cs-metrics { grid-template-columns: 1fr; } }

.cs-metric {
  background: var(--bg3); padding: var(--s6) var(--s5);
  transition: background .3s;
}
.cs-metric:hover { background: var(--bg2); }

.cs-metric-n {
  font-family: var(--fd); font-weight: 700;
  font-size: clamp(3rem, 6vw, 6rem);
  letter-spacing: -.05em; line-height: 1;
  color: var(--tx); margin-bottom: var(--s2);
}
.cs-metric-n sup {
  font-size: .45em; font-weight: 300;
  color: var(--txm); vertical-align: super;
}
.cs-metric-label {
  font-family: var(--fm); font-size: var(--xs);
  color: var(--txm); letter-spacing: .08em;
  text-transform: uppercase; margin-bottom: 4px;
}
.cs-metric-desc {
  font-size: var(--sm); color: var(--txm); line-height: 1.6;
}


/* ── TESTIMONIAL PULLQUOTE ────────────────────────────────── */
/* Make reflection section feel like a major closing insight */
.cs-pullquote,
.cs-reflection,
blockquote.cs-pullquote {
  max-width: 1180px !important;
  margin: clamp(4rem, 8vw, 7rem) auto !important;
  padding: clamp(3rem, 7vw, 6rem) clamp(1.5rem, 6vw, 5rem) !important;

  border-top: 1px solid rgba(255, 255, 255, 0.16) !important;
  border-bottom: 1px solid rgba(255, 255, 255, 0.16) !important;

  text-align: center !important;
}

.cs-pullquote p,
.cs-reflection p,
blockquote.cs-pullquote p {
  max-width: 1100px !important;
  margin: 0 auto !important;

  font-family: var(--fd, inherit) !important;
  font-size: clamp(3rem, 4.8vw, 5.25rem) !important;
  line-height: 0.98 !important;
  letter-spacing: -0.06em !important;
  font-weight: 700 !important;
  font-style: normal !important;

  color: var(--tx, #fff) !important;
}
/* =====================================================
   Problem / Solution Section Fix
   Makes the text readable, structured, and premium
===================================================== */

.cs-ps-grid {
  width: min(100% - 2rem, 1320px) !important;
  margin: clamp(3rem, 7vw, 6rem) auto !important;

  display: grid !important;
  grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
  gap: clamp(1rem, 2vw, 1.5rem) !important;

  align-items: stretch !important;
}

.cs-body:has(.cs-num)::after {
  font-weight: 800;
}

.cs-ps-i {
  position: relative !important;

  padding: clamp(1.5rem, 4vw, 3rem) !important;
  min-height: clamp(320px, 34vw, 520px) !important;

  display: flex !important;
  flex-direction: column !important;
  justify-content: space-between !important;
  gap: clamp(1.5rem, 3vw, 2.5rem) !important;

  border-radius: clamp(1rem, 2vw, 1.75rem) !important;
  border: 1px solid var(--bd, rgba(255, 255, 255, 0.12)) !important;

  background:
    linear-gradient(
      135deg,
      rgba(255, 255, 255, 0.055),
      rgba(255, 255, 255, 0.015)
    ) !important;

  overflow: hidden !important;
}

.cs-ps-head {
  display: flex !important;
  align-items: center !important;
  gap: 1rem !important;

  font-family: var(--fm, monospace) !important;
  font-size: 0.72rem !important;
  line-height: 1 !important;
  letter-spacing: 0.14em !important;
  text-transform: uppercase !important;

  color: rgba(255, 255, 255, 0.75) !important;
}

.cs-ps-head-line {
  display: block !important;
  flex: 1 !important;
  height: 1px !important;
  background: rgba(255, 255, 255, 0.2) !important;
}

.cs-ps-body {
  margin: 0 !important;

  font-family: var(--fd, inherit) !important;
  font-size: clamp(1.35rem, 2.4vw, 2.7rem) !important;
  line-height: 1.08 !important;
  letter-spacing: -0.055em !important;
  font-weight: 700 !important;

  color: var(--tx, #fff) !important;
  max-width: 18ch !important;
}

.cs-ps-quote {
  margin: 0 !important;
  padding-top: clamp(1.5rem, 3vw, 2.25rem) !important;

  border-top: 1px solid rgba(255, 255, 255, 0.12) !important;

  font-size: clamp(1rem, 1.25vw, 1.2rem) !important;
  line-height: 1.55 !important;
  letter-spacing: -0.02em !important;
  font-style: italic !important;

  color: rgba(255, 255, 255, 0.72) !important;
}
/* Reflection — bold final insight, slightly smaller */
.cs-reflection-section {
  max-width: 1320px !important;
  margin: 0 auto !important;
  padding-top: clamp(4rem, 8vw, 7rem) !important;
  padding-bottom: clamp(4rem, 8vw, 7rem) !important;
}

.cs-reflection-text {
  max-width: 1080px !important;
  margin: clamp(2.5rem, 5vw, 4rem) auto 0 !important;

  font-family: var(--fd, inherit) !important;
  font-size: clamp(1.9rem, 4.2vw, 4.6rem) !important;
  line-height: 1.05 !important;
  letter-spacing: -0.055em !important;
  font-weight: 800 !important;
  font-style: normal !important;

  color: var(--tx, #fff) !important;
  text-align: center !important;
}

/* Make the solution card feel slightly different */
.cs-ps-i:nth-child(2) {
  background:
    radial-gradient(
      circle at top right,
      rgba(255, 255, 255, 0.085),
      transparent 36%
    ),
    linear-gradient(
      135deg,
      rgba(255, 255, 255, 0.05),
      rgba(255, 255, 255, 0.012)
    ) !important;
}

/* Mobile */
@media (max-width: 820px) {
  .cs-ps-grid {
    grid-template-columns: 1fr !important;
    width: min(100% - 1.25rem, 1320px) !important;
  }

  .cs-ps-i {
    min-height: auto !important;
  }

  .cs-ps-body {
    max-width: 100% !important;
    font-size: clamp(1.6rem, 9vw, 3rem) !important;
  }
}

/* Optional: make italic/emphasis inside the reflection feel premium */
.cs-pullquote em,
.cs-reflection em,
blockquote.cs-pullquote em {
  font-style: italic !important;
  font-weight: 500 !important;
  color: rgba(255, 255, 255, 0.72) !important;
}


/* ── TECH STACK ───────────────────────────────────────────── */
.cs-stack {
  display: flex; flex-wrap: wrap; gap: var(--s4);
  padding: var(--s8) 0; border-top: 1px solid var(--bd);
}
.cs-stack-item {
  display: flex; flex-direction: column; gap: 6px;
  min-width: 120px;
}
.cs-stack-cat {
  font-family: var(--fm); font-size: var(--xs);
  color: var(--txd); letter-spacing: .12em; text-transform: uppercase;
}
.cs-stack-tools { display: flex; flex-wrap: wrap; gap: 6px; }


/* ── Figma Prototype Embed ─────────────────────────────── */
.cs-prototype-frame {
  width: min(100% - 2rem, 1500px) !important;
  margin: 0 auto clamp(2.5rem, 6vw, 5rem) !important;
  border-radius: clamp(1rem, 2vw, 1.5rem) !important;
  overflow: hidden !important;
  border: 1px solid var(--bd, rgba(255,255,255,.12)) !important;
  background: var(--bg2, #111) !important;
}

.cs-prototype-frame iframe {
  width: 100% !important;
  height: 600px !important;
  display: block !important;
  border: none !important;
}

@media (max-width: 760px) {
  .cs-prototype-frame {
    width: min(100% - 1.25rem, 1500px) !important;
  }
  .cs-prototype-frame iframe {
    height: 80vh !important;
  }
}

/* ── NEXT PROJECT ─────────────────────────────────────── */
.cs-next {
  display: block; text-decoration: none; color: var(--tx);
  padding: var(--s16) var(--s6);
  background: var(--bg3); border-top: 1px solid var(--bd);
  cursor: pointer; position: relative; overflow: hidden;
  transition: background .4s;
  position: relative !important;
  right: auto !important;
  bottom: auto !important;
  top: auto !important;
  left: auto !important;

  /* margin: clamp(4rem, 8vw, 7rem) auto 0 !important;
  width: min(100% - 2rem, 1120px) !important; */
}
.cs-next:hover { background: var(--bg2); }

.cs-next::before {
  content: '';
  position: absolute; left: 0; top: 0; bottom: 0;
  width: 3px; background: var(--tx);
  transform: scaleY(0); transform-origin: bottom;
  transition: transform .5s var(--e2);
}
.cs-next:hover::before { transform: scaleY(1); }

.cs-next-label {
  font-family: var(--fm); font-size: var(--xs);
  color: var(--txm); letter-spacing: .18em; text-transform: uppercase;
  margin-bottom: var(--s4);
}
.cs-next-title {
  font-family: var(--fd); font-weight: 700;
  font-size: clamp(2.5rem, 7vw, 8rem);
  letter-spacing: -.055em; line-height: .9;
  text-transform: uppercase;
  transition: transform .4s var(--e2), letter-spacing .4s var(--e2);
}
.cs-next:hover .cs-next-title {
  transform: translateX(12px); letter-spacing: -.04em;
}
.cs-next-arr {
  position: absolute; right: var(--s6); top: 50%;
  transform: translateY(-50%);
  width: 52px; height: 52px; border-radius: 50%;
  border: 1px solid var(--bdm);
  display: none !important;
  font-size: 16px; color: var(--txm);
  transition: transform .45s var(--e3), border-color .3s, background .3s, color .3s;
}
.cs-next:hover .cs-next-arr {
  transform: translateY(-50%) rotate(-45deg) scale(1.1);
  border-color: var(--tx); background: var(--tx); color: var(--bg);
}

/* ═══════════════════════════════════════════════════════════
   RESEARCH: HEURISTIC EVALUATION & PAIN POINTS
   ═══════════════════════════════════════════════════════════ */

/* ── Evaluation + User Flow — Side by Side ────────────────── */
.cs-research-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s6);
}
@supports not (grid-template-columns: 1fr 1fr) {
  .cs-research-2col { display: flex; flex-wrap: wrap; }
  .cs-research-2col > * { flex: 1 1 48%; }
}
@media (max-width: 900px) { .cs-research-2col { grid-template-columns: 1fr; } }

.cs-research-col { min-width: 0; }

.cs-research-col-title {
  font-family: var(--fd); font-weight: 700;
  font-size: clamp(1.6rem, 2.8vw, 2.8rem);
  letter-spacing: -.04em; line-height: .98;
  text-transform: uppercase;
  margin-bottom: var(--s5);
  color: var(--tx);
}
.cs-research-col-title em {
  font-style: normal; font-weight: 300;
  color: var(--txm); text-transform: none;
  letter-spacing: -.025em;
}

/* ── Pain Point Evidence ───────────────────────────────────── */
.cs-pain-evidence-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--s4);
}
@supports not (grid-template-columns: repeat(2, 1fr)) {
  .cs-pain-evidence-grid { display: flex; flex-wrap: wrap; }
  .cs-pain-evidence-grid > * { flex: 1 1 46%; }
}
@media (max-width: 760px) { .cs-pain-evidence-grid { grid-template-columns: 1fr; } }

.cs-pain-evidence-item {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--bd);
  border-radius: clamp(1rem, 2vw, 1.5rem);
  overflow: hidden;
  background: var(--bg3);
  height: 480px;
  transition: border-color .3s, transform .3s;
}
.cs-pain-evidence-item:hover {
  border-color: rgba(255, 80, 80, 0.25);
  transform: translateY(-2px);
}

.cs-pain-evidence-item img {
  width: 100%;
  height: 380px;
  object-fit: contain;
  display: block;
  background: var(--bg2);
}

.cs-pain-evidence-caption {
  padding: var(--s3) var(--s4);
  font-family: var(--fd);
  font-size: clamp(.75rem, 1.1vw, .95rem);
  line-height: 1.5;
  color: var(--txm);
  border-top: 1px solid var(--bd);
  background: rgba(255, 255, 255, 0.02);
  flex: 0 0 100px;
}

/* ── Heuristic Evaluation Grid ─────────────────────────────── */
.cs-research-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--bd);
  border-bottom: 1px solid var(--bd);
}
@media (max-width: 900px) { .cs-research-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .cs-research-grid { grid-template-columns: 1fr; } }

.cs-research-card {
  background: var(--bg3);
  padding: var(--s6) var(--s5);
  border-right: 1px solid var(--bd);
  transition: background .3s;
}
.cs-research-card:hover { background: var(--bg2); }
.cs-research-card:last-child { border-right: none; }
@media (max-width: 900px) {
  .cs-research-card:nth-child(2) { border-right: none; }
  .cs-research-card:nth-child(3),
  .cs-research-card:nth-child(4) { border-top: 1px solid var(--bd); }
  .cs-research-card:nth-child(4) { border-right: none; }
}
@media (max-width: 640px) {
  .cs-research-card { border-right: none; }
  .cs-research-card:nth-child(2),
  .cs-research-card:nth-child(3),
  .cs-research-card:nth-child(4),
  .cs-research-card:nth-child(5) { border-top: 1px solid var(--bd); }
}

.cs-research-num {
  font-family: var(--fm);
  font-size: var(--xs);
  color: var(--txd);
  letter-spacing: .14em;
  margin-bottom: var(--s4);
}

.cs-research-label {
  font-family: var(--fd);
  font-size: clamp(1.5rem, 2.2vw, 2.4rem);
  font-weight: 700;
  color: var(--tx);
  letter-spacing: -.03em;
  margin-bottom: var(--s3);
  line-height: 1.15;
}

.cs-research-violation {
  display: inline-block;
  font-family: var(--fm);
  font-size: clamp(0.65rem, 0.9vw, 0.78rem);
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  margin-bottom: var(--s4);
  padding: 5px 12px;
  border-radius: 3px;
  color: rgba(255, 120, 120, 0.9);
  border: 1px solid rgba(255, 120, 120, 0.25);
  background: rgba(255, 120, 120, 0.06);
}
.cs-research-violation::before {
  content: '';
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  margin-right: 7px;
  vertical-align: middle;
  background: rgba(255, 120, 120, 0.7);
}

/* Partial violation - amber */
.cs-research-card:has(.cs-research-violation:contains("PARTIAL")) .cs-research-violation {
  color: rgba(255, 180, 100, 0.9);
  border-color: rgba(255, 180, 100, 0.25);
  background: rgba(255, 180, 100, 0.06);
}
.cs-research-card:has(.cs-research-violation:contains("PARTIAL")) .cs-research-violation::before {
  background: rgba(255, 180, 100, 0.7);
}

.cs-research-desc {
  font-size: var(--sm);
  color: var(--txm);
  line-height: 1.75;
  margin: 0;
}

/* Light mode */
[data-theme="light"] .cs-research-card { background: #fafafa; }
[data-theme="light"] .cs-research-card:hover { background: #f0f0f2; }
[data-theme="light"] .cs-research-label { color: #111; }
[data-theme="light"] .cs-research-num { color: #777; }
[data-theme="light"] .cs-research-desc { color: #555; }
[data-theme="light"] .cs-research-violation {
  color: #c0392b;
  border-color: rgba(192, 57, 43, 0.25);
  background: rgba(192, 57, 43, 0.06);
}
[data-theme="light"] .cs-research-violation::before { background: #c0392b; }
[data-theme="light"] .cs-research-card:has(.cs-research-violation:contains("PARTIAL")) .cs-research-violation {
  color: #d35400;
  border-color: rgba(211, 84, 0, 0.25);
  background: rgba(211, 84, 0, 0.06);
}
[data-theme="light"] .cs-research-card:has(.cs-research-violation:contains("PARTIAL")) .cs-research-violation::before {
  background: #d35400;
}

/* ── Pain Points Grid ───────────────────────────────────────── */
.cs-pain-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--s6);
}
@media (max-width: 640px) { .cs-pain-grid { grid-template-columns: 1fr; } }

.cs-pain-item {
  display: flex;
  flex-direction: column;
  gap: var(--s3);
  padding: var(--s6);
  border: 1px solid var(--bd);
  border-radius: clamp(1rem, 2vw, 1.5rem);
  background: linear-gradient(135deg, rgba(255, 80, 80, 0.04), transparent);
  transition: border-color .3s, background .3s;
}
.cs-pain-item:hover {
  border-color: rgba(255, 80, 80, 0.25);
  background: linear-gradient(135deg, rgba(255, 80, 80, 0.08), transparent);
}

[data-theme="light"] .cs-pain-item {
  background: linear-gradient(135deg, rgba(192, 57, 43, 0.04), transparent);
  border-color: var(--bd);
}
[data-theme="light"] .cs-pain-item:hover {
  border-color: rgba(192, 57, 43, 0.3);
  background: linear-gradient(135deg, rgba(192, 57, 43, 0.08), transparent);
}

.cs-pain-icon {
  font-size: 2rem;
  line-height: 1;
  margin-bottom: var(--s2);
}

.cs-pain-title {
  font-family: var(--fd);
  font-size: var(--xl);
  font-weight: 700;
  color: var(--tx);
  letter-spacing: -.03em;
  line-height: 1.1;
}

/* ── Pain Point Evidence ───────────────────────────────────── */
.cs-pain-item {
  display: flex;
  flex-direction: column;
  gap: var(--s3);
  padding: var(--s6);
  border: 1px solid var(--bd);
  border-radius: clamp(1rem, 2vw, 1.5rem);
  background: linear-gradient(135deg, rgba(255, 80, 80, 0.04), transparent);
  transition: border-color .3s, background .3s;
  min-height: 220px;
}
.cs-pain-item:hover {
  border-color: rgba(255, 80, 80, 0.25);
  background: linear-gradient(135deg, rgba(255, 80, 80, 0.08), transparent);
}

/* ── Miro Board Embeds ─────────────────────────────────────── */
.cs-miro-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--s6);
}
@supports not (grid-template-columns: repeat(2, 1fr)) {
  .cs-miro-grid { display: flex; flex-wrap: wrap; }
  .cs-miro-grid > * { flex: 1 1 46%; }
}
@media (max-width: 900px) { .cs-miro-grid { grid-template-columns: 1fr; } }

.cs-miro-card {
  border: 1px solid var(--bd);
  border-radius: clamp(1rem, 2vw, 1.5rem);
  overflow: hidden;
  background: var(--bg3);
}
.cs-miro-card img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  object-position: center top;
  display: block;
  border-bottom: 1px solid var(--bd);
  background: var(--bg2);
}

.cs-miro-title {
  font-family: var(--fd); font-weight: 700;
  font-size: clamp(1.4rem, 2.2vw, 2rem);
  letter-spacing: -.03em; line-height: 1.05;
  text-transform: uppercase;
  padding: var(--s4) var(--s5);
  color: var(--tx);
  border-bottom: 1px solid var(--bd);
  margin: 0;
}
.cs-miro-title em {
  font-style: normal; font-weight: 300;
  color: var(--txm); text-transform: none;
}

.cs-miro-frame {
  width: 100%;
  aspect-ratio: 16 / 10;
}
.cs-miro-frame iframe {
  width: 100%;
  height: 100%;
  display: block;
  border: none;
}

/* ── Pain Point Evidence ───────────────────────────────────── */
.cs-pain-desc {
  font-size: var(--sm);
  color: var(--txm);
  line-height: 1.7;
}

/* ── Pain Point Source Links ────────────────────────────────── */
.cs-pain-sources {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s2);
  margin-top: auto;
  padding-top: var(--s3);
}

.cs-pain-src {
  font-family: var(--fm);
  font-size: var(--xs);
  color: var(--txm);
  letter-spacing: .08em;
  text-decoration: none;
  text-transform: uppercase;
  border: 1px solid var(--bd);
  padding: 4px 10px;
  border-radius: 4px;
  transition: color .2s, border-color .2s, background .2s;
  white-space: nowrap;
}

.cs-pain-src:hover {
  color: var(--tx);
  border-color: var(--accent);
  background: rgba(255, 107, 53, 0.06);
}

/* Light mode */
[data-theme="light"] .cs-pain-src {
  color: #555;
  border-color: #ddd;
}

[data-theme="light"] .cs-pain-src:hover {
  color: var(--accent-dark);
  border-color: var(--accent);
  background: rgba(255, 107, 53, 0.08);
}

/* ── Research Images / Artifacts ──────────────────────────────── */
.cs-research-artifacts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--s6);
}
@media (max-width: 900px) { .cs-research-artifacts-grid { grid-template-columns: 1fr; } }

.cs-research-artifact-card {
  border: 1px solid var(--bd);
  border-radius: clamp(1rem, 2vw, 1.5rem);
  overflow: hidden;
  background: var(--bg3);
}

.cs-research-artifact-frame {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--bg2);
  border-bottom: 1px solid var(--bd);
}

.cs-research-artifact-frame iframe {
  width: 100%;
  height: 100%;
  display: block;
}

.cs-research-images {
  display: flex;
  flex-direction: column;
  gap: var(--s6);
}

.cs-research-images-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--s6);
}
@media (max-width: 640px) { .cs-research-images-grid { grid-template-columns: 1fr; } }

.cs-research-img {
  border: 1px solid var(--bd);
  border-radius: clamp(1rem, 2vw, 1.5rem);
  overflow: hidden;
  background: var(--bg3);
}

.cs-research-img-placeholder {
  aspect-ratio: 16 / 9;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg2);
  border-bottom: 1px solid var(--bd);
}

.cs-research-img-label {
  font-family: var(--fm);
  font-size: var(--sm);
  color: var(--txm);
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: var(--s4) var(--s6);
  border: 2px dashed var(--bd);
  border-radius: 8px;
  text-align: center;
}

.cs-research-img-placeholder img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.cs-research-img-cap {
  padding: var(--s3) var(--s5);
  font-size: var(--xs);
  color: var(--txm);
  line-height: 1.6;
  letter-spacing: .04em;
}

/* Light mode */
[data-theme="light"] .cs-research-img-placeholder { background: #f0f0f2; }
[data-theme="light"] .cs-research-img-label { color: #555; border-color: #ccc; }

@media (max-width: 640px) {
  .cs-research-label { font-size: var(--sm); }
}