/* ═══ CASE STUDY — Cards, Nav, Hero, Sections ═══ */

/* ═══ PRODUCT VISION PAGE NAV ═══ */
.pv-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  backdrop-filter: blur(20px);
  background: var(--nav-bg);
  border-bottom: 1px solid var(--bdr);
}

.pv-nav__back {
  font-family: var(--fm);
  font-size: .72rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--t2);
  text-decoration: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: .5rem;
  transition: color .3s;
}

.pv-nav__back:hover {
  color: var(--a1);
}

.pv-nav__title {
  font-family: var(--fm);
  font-size: .7rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--t3);
}

.pv-hero {
  padding: 7rem 2rem 1.5rem;
  max-width: 1080px;
  margin: 0 auto;
}

.pv-hero__eyebrow {
  font-family: var(--fm);
  font-size: .68rem;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--a1);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: .75rem;
}

.pv-hero__eyebrow::before {
  content: '';
  width: 1.5rem;
  height: 1px;
  background: var(--a1);
}

.pv-hero__title {
  font-family: var(--fd);
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.12;
  font-weight: 400;
  margin-bottom: 1.25rem;
}

.pv-hero__title em {
  font-style: italic;
  background: linear-gradient(135deg, var(--a2), var(--a4));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.pv-hero__desc {
  font-size: 1rem;
  color: var(--t2);
  max-width: 100%;
  line-height: 1.75;
}

/* ═══ DOMAIN NAV ═══ */
.cs-domain-nav {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  gap: 2.5rem;
  border-bottom: 1px solid var(--bdr);
}

.cs-domain-nav__link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: .5rem;
  text-decoration: none;
  padding: 1rem 0 1.25rem;
  border-bottom: 2px solid transparent;
  transition: border-color .25s ease, filter .25s ease, opacity .25s ease;
  filter: grayscale(80%) opacity(0.9);
}

.cs-domain-nav__link:hover {
  filter: grayscale(40%) opacity(0.9);
}

.cs-domain-nav__link--active {
  filter: none;
  opacity: 1;
  border-bottom-color: transparent;
}

.cs-domain-nav__link--active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(135deg, #4f46e5, #9333ea);
  border-radius: 1px;
}

.cs-domain-nav__link--active:hover {
  filter: none;
  opacity: .8;
}

.cs-domain-nav__prefix {
  font-family: var(--fm);
  font-size: .78rem;
  font-weight: 400;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: #000;
}

.cs-domain-nav__name {
  font-family: var(--fd);
  font-size: 2.35rem;
  font-weight: 400;
  color: var(--t1);
  line-height: 1.15;
}

.cs-domain-nav__colon {
  font-family: var(--fm);
  font-size: .78rem;
  color: var(--t3);
  margin-left: -.3rem;
}

.cs-domain-nav__arrow {
  font-size: .75rem;
  color: var(--t3);
  margin-left: -.2rem;
  align-self: center;
  transition: transform .25s ease;
}

.cs-domain-nav__link:hover .cs-domain-nav__arrow {
  transform: translateY(2px);
}

/* Domain gradients */
.cs-domain-nav__link[data-domain="ai"] .cs-domain-nav__name {
  background: linear-gradient(135deg, #4f46e5, #9333ea);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cs-domain-nav__link[data-domain="payments"] .cs-domain-nav__name {
  background: linear-gradient(135deg, var(--a2), var(--a4));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cs-domain-nav__link[data-domain="dms"] .cs-domain-nav__name {
  background: linear-gradient(135deg, var(--a1), var(--a4));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cs-domain-nav__link[data-domain="strategy"] .cs-domain-nav__name {
  background: linear-gradient(135deg, var(--a3), var(--a2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ═══ DOMAIN ANCHORS ═══ */
.cs-domain-anchor {
  scroll-margin-top: 80px;
  padding-top: 1.5rem;
}

/* ═══ DOMAIN SECTION HEADER ═══ */
.cs-domain-header {
  display: flex;
  align-items: baseline;
  gap: .5rem;
  padding: 2rem 0 .75rem;
  border-bottom: 1px solid var(--bdr);
  margin-bottom: .75rem;
}

.cs-domain-header__prefix {
  font-family: var(--fm);
  font-size: .78rem;
  font-weight: 400;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: #000;
}

.cs-domain-header__colon {
  font-family: var(--fm);
  font-size: .78rem;
  color: var(--t3);
  margin-left: -.3rem;
}

.cs-domain-header__name {
  font-family: var(--fd);
  font-size: 2.35rem;
  font-weight: 400;
  line-height: 1;
}

.cs-domain-header[data-domain="payments"] .cs-domain-header__name {
  background: linear-gradient(135deg, var(--a2), var(--a4));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cs-domain-header[data-domain="dms"] .cs-domain-header__name {
  background: linear-gradient(135deg, var(--a1), var(--a4));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cs-domain::before {
  content: 'Domain';
  font-family: var(--fm);
  font-size: .7rem;
  font-weight: 400;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--t3);
}

.cs-domain::after {
  content: ':';
  font-family: var(--fm);
  font-size: .7rem;
  color: var(--t3);
  margin-left: -.45rem;
}

.cs-domain__name {
  font-family: var(--fd);
  font-size: 2.2rem;
  font-weight: 400;
  color: var(--t1);
  line-height: 1.2;
}

.cs-domain:first-child {
  padding-top: .5rem;
}

/* ═══ CASE STUDY CARDS ═══ */
.cs-card {
  display: flex;
  border: 1px solid var(--bdr);
  border-radius: 8px;
  overflow: hidden;
  background: var(--card);
  cursor: pointer;
  transition: all .4s ease;
  max-width: 1080px;
  margin: 1rem auto 30px;
  text-decoration: none;
  color: inherit;
}

.cs-card:hover {
  border-color: rgba(26, 107, 60, .2);
  box-shadow: 0 12px 48px rgba(0, 0, 0, .06), 0 0 0 1px rgba(26, 107, 60, .06);
  transform: translateY(-3px);
  transition: all .4s cubic-bezier(.25, 1, .5, 1);
}

.cs-card__accent {
  width: 5px;
  flex-shrink: 0;
  background: linear-gradient(180deg, var(--a1), var(--a2));
}

.cs-card__content {
  padding: 2.5rem;
  flex: 1;
}

.cs-card__tag {
  font-family: var(--fm);
  font-size: .58rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--a1);
  margin-bottom: .75rem;
  display: inline-block;
  background: rgba(26, 107, 60, .06);
  padding: .25rem .6rem;
  border-radius: 3px;
}

.cs-card__title {
  font-family: var(--fd);
  font-size: 1.6rem;
  font-weight: 400;
  margin-bottom: .75rem;
  line-height: 1.2;
}

.cs-card__desc {
  font-size: .92rem;
  color: var(--t2);
  line-height: 1.65;
  margin-bottom: 1.5rem;
  max-width: 560px;
}

.cs-card__meta {
  display: flex;
  gap: 2.5rem;
  flex-wrap: wrap;
}

.cs-card__meta-label {
  font-family: var(--fm);
  font-size: .58rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--t3);
  margin-bottom: .25rem;
}

.cs-card__meta-value {
  font-size: .85rem;
  font-weight: 600;
}

.cs-card__stats {
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1.5rem;
  border-left: 1px solid var(--bdr);
  min-width: 180px;
  background: var(--card-h);
}

.cs-card__stat-num {
  font-family: var(--fd);
  font-size: 1.8rem;
  color: var(--a1);
  line-height: 1;
}

.cs-card__stat-desc {
  font-size: .72rem;
  color: var(--t2);
  line-height: 1.4;
}

/* ═══ CASE STUDY NAV ═══ */
.cs-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  backdrop-filter: blur(20px);
  background: var(--nav-bg);
  border-bottom: 1px solid var(--bdr);
}

.cs-nav__back {
  font-family: var(--fm);
  font-size: .72rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--t2);
  text-decoration: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: .5rem;
  transition: color .3s;
}

.cs-nav__back:hover {
  color: var(--a1);
}

.cs-nav__label {
  font-family: var(--fm);
  font-size: .7rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--t3);
}

.cs-nav__toc {
  display: flex;
  gap: 1.75rem;
  list-style: none;
}

.cs-nav__toc a {
  font-family: var(--fm);
  font-size: .68rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--t3);
  text-decoration: none;
  transition: color .3s;
}

.cs-nav__toc a:hover {
  color: var(--a1);
}

/* ═══ CASE STUDY IMAGES ═══ */
.case-img {
  margin: 3rem 0;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 24px rgba(0,0,0,.06);
}
.case-img img {
  width: 100%;
  display: block;
}
.case-img--full {
  margin: 4rem 0;
  border-radius: 0;
  box-shadow: none;
}
.case-img--full img {
  width: 100%;
}
.case-img--dark {
  background: #1a1a2e;
  padding: 2rem 0;
}
.case-img--dark img {
  max-width: 1200px;
  margin: 0 auto;
}
.case-img__caption {
  font-family: var(--fm);
  font-size: .65rem;
  color: var(--t3);
  letter-spacing: .06em;
  text-align: left;
  padding: 1rem 2rem 0;
}
.case-img-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin: 3rem 0;
}
.case-img-pair .case-img {
  margin: 0;
}
@media (max-width: 768px) {
  .case-img-pair {
    grid-template-columns: 1fr;
  }
}

/* ═══ CASE HERO ═══ */
.case-hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 0 2rem 6rem;
  position: relative;
}

.case-hero__bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse 80% 60% at 20% 10%, rgba(26, 107, 60, .04) 0%, transparent 60%), radial-gradient(ellipse 60% 50% at 80% 80%, rgba(43, 94, 167, .03) 0%, transparent 50%);
  z-index: 0;
}

.case-hero__lines {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 0;
  opacity: .3;
  background-image: linear-gradient(var(--bdr) 1px, transparent 1px);
  background-size: 100% 80px;
}

.case-hero__content {
  position: relative;
  z-index: 1;
  max-width: 1080px;
  margin: 0 auto;
  width: 100%;
}

.case-hero__eyebrow {
  font-family: var(--fm);
  font-size: .72rem;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--a1);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: .75rem;
}

.case-hero__eyebrow::before {
  content: '';
  width: 2rem;
  height: 1px;
  background: var(--a1);
}

.case-hero__title {
  font-family: var(--fd);
  font-size: clamp(3rem, 7vw, 5.5rem);
  line-height: 1.05;
  font-weight: 400;
  letter-spacing: -.02em;
  margin-bottom: 2rem;
}

.case-hero__title em {
  font-style: italic;
  background: linear-gradient(135deg, var(--a1), var(--a2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.case-hero__subtitle {
  font-size: 1.15rem;
  color: var(--t2);
  max-width: 560px;
  line-height: 1.75;
}

/* ═══ META STRIP ═══ */
.meta-strip {
  border-top: 1px solid var(--bdr);
  border-bottom: 1px solid var(--bdr);
  padding: 2.5rem 0;
  background: var(--card);
}

.meta-strip__inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 2rem;
}

.meta-strip__item {}

.meta-strip__label {
  font-family: var(--fm);
  font-size: .65rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--t3);
  margin-bottom: .5rem;
}

.meta-strip__value {
  font-size: .95rem;
  font-weight: 600;
}

/* ═══ IMPACT BANNER ═══ */
.impact-banner {
  padding: 5rem 0;
  background: var(--bg2);
  border-bottom: 1px solid var(--bdr);
}

.impact-banner__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--bdr);
  border: 1px solid var(--bdr);
  border-radius: 4px;
  overflow: hidden;
}

.impact-banner__stat {
  background: var(--card);
  padding: 2.5rem 2rem;
  text-align: center;
}

.impact-banner__number {
  font-family: var(--fd);
  font-size: 2.8rem;
  color: var(--a1);
  line-height: 1;
  margin-bottom: .75rem;
}

.impact-banner__desc {
  font-size: .82rem;
  color: var(--t2);
  line-height: 1.5;
}

/* ═══ SECTION LAYOUT ═══ */
.section {
  padding: 6rem 0;
  border-bottom: 1px solid var(--bdr);
}

.section--tinted {
  background: var(--bg2);
}

.section--warm {
  background: var(--bg3);
}

.section__eyebrow {
  font-family: var(--fm);
  font-size: .68rem;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--a1);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: .75rem;
}

.section__eyebrow::before {
  content: '';
  width: 1.5rem;
  height: 1px;
  background: var(--a1);
}

.section__title {
  font-family: var(--fd);
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  line-height: 1.15;
  font-weight: 400;
  margin-bottom: 2rem;
  letter-spacing: -.01em;
}

.section__title em {
  font-style: italic;
  background: linear-gradient(135deg, var(--a1), var(--a2), var(--a4));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section__body {
  font-size: 1.02rem;
  color: var(--t2);
  line-height: 1.85;
  max-width: 100%;
}

.section__body p+p {
  margin-top: 1.5rem;
}

.section__body strong {
  color: var(--t1);
  font-weight: 600;
}

/* ═══ CALLOUTS ═══ */
.callout {
  border-left: 2px solid var(--a1);
  padding: 1.75rem 2rem;
  margin: 2.5rem 0;
  background: rgba(26, 107, 60, .03);
  border-radius: 0 4px 4px 0;
}

.callout p {
  font-size: 1.05rem;
  color: var(--t1);
  line-height: 1.75;
  font-style: italic;
}

.callout--blue {
  border-left-color: var(--a2);
  background: rgba(43, 94, 167, .03);
}

/* ═══ GRIDS & CARDS ═══ */
.workshop-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--bdr);
  border: 1px solid var(--bdr);
  border-radius: 6px;
  margin: 3rem 0;
  overflow: hidden;
}

.workshop-card {
  background: var(--card);
  padding: 2.5rem 2rem;
  transition: background .3s;
}

.workshop-card:hover {
  background: var(--card-h);
}

.workshop-card__session {
  font-family: var(--fm);
  font-size: .65rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--a1);
  margin-bottom: .75rem;
}

.workshop-card__title {
  font-family: var(--fd);
  font-size: 1.2rem;
  margin-bottom: 1rem;
  line-height: 1.3;
}

.workshop-card__body {
  font-size: .88rem;
  color: var(--t2);
  line-height: 1.7;
}

.collab-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--bdr);
  border: 1px solid var(--bdr);
  border-radius: 6px;
  margin: 3rem 0;
  overflow: hidden;
}

.collab-item {
  background: var(--card);
  padding: 2rem;
}

.collab-item__icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  font-size: .9rem;
}

.collab-item__icon--green { background: rgba(26, 107, 60, .08); color: var(--a1); }
.collab-item__icon--blue { background: rgba(43, 94, 167, .08); color: var(--a2); }
.collab-item__icon--orange { background: rgba(196, 85, 10, .08); color: var(--a3); }
.collab-item__icon--purple { background: rgba(123, 75, 170, .08); color: var(--a4); }

.collab-item__title {
  font-weight: 600;
  font-size: .95rem;
  margin-bottom: .6rem;
}

.collab-item__body {
  font-size: .85rem;
  color: var(--t2);
  line-height: 1.65;
}

.persona-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--bdr);
  border: 1px solid var(--bdr);
  border-radius: 6px;
  margin: 3rem 0;
  overflow: hidden;
}

.persona-card {
  background: var(--card);
  padding: 2.5rem 2rem;
  position: relative;
}

.persona-card--active::after {
  content: 'MVP PRIORITY';
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  font-family: var(--fm);
  font-size: .6rem;
  letter-spacing: .1em;
  color: #fff;
  background: var(--a1);
  padding: .25rem .6rem;
  border-radius: 3px;
  font-weight: 500;
}

.persona-card--deferred {
  background: var(--card-h);
  opacity: .7;
}

.persona-card--deferred::after {
  content: 'DEFERRED';
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  font-family: var(--fm);
  font-size: .6rem;
  letter-spacing: .1em;
  color: var(--t3);
  background: var(--bg2);
  padding: .25rem .6rem;
  border-radius: 3px;
  border: 1px solid var(--bdr);
}

.persona-card__number {
  font-family: var(--fm);
  font-size: .65rem;
  color: var(--t3);
  margin-bottom: .75rem;
}

.persona-card__title {
  font-family: var(--fd);
  font-size: 1.15rem;
  margin-bottom: .75rem;
  line-height: 1.3;
}

.persona-card__body {
  font-size: .88rem;
  color: var(--t2);
  line-height: 1.65;
}

/* ═══ LAYER DIAGRAM ═══ */
.layer-diagram {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin: 3rem 0;
}

.layer-block {
  padding: 3rem 2.5rem;
  border-radius: 6px;
}

.layer-block--experience {
  background: rgba(43, 94, 167, .04);
  border: 1px solid rgba(43, 94, 167, .12);
}

.layer-block--studio {
  background: rgba(26, 107, 60, .04);
  border: 1px solid rgba(26, 107, 60, .12);
}

.layer-block__tag {
  font-family: var(--fm);
  font-size: .62rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.layer-block--experience .layer-block__tag { color: var(--a2); }
.layer-block--studio .layer-block__tag { color: var(--a1); }

.layer-block__title {
  font-family: var(--fd);
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.layer-block__body {
  font-size: .88rem;
  color: var(--t2);
  line-height: 1.7;
}

.layer-block__users {
  margin-top: 1.25rem;
  font-family: var(--fm);
  font-size: .7rem;
  color: var(--t3);
  letter-spacing: .05em;
}

/* ═══ JOURNEY COMPARE ═══ */
.journey-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin: 3rem 0;
}

.journey-box {
  border: 1px solid var(--bdr);
  border-radius: 6px;
  padding: 2.5rem 2rem;
  background: var(--card);
}

.journey-box--before { opacity: .6; }

.journey-box--after {
  border-color: rgba(26, 107, 60, .2);
  background: rgba(26, 107, 60, .02);
}

.journey-box__tag {
  font-family: var(--fm);
  font-size: .62rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.journey-box--before .journey-box__tag { color: var(--t3); }
.journey-box--after .journey-box__tag { color: var(--a1); }

.journey-step {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.journey-step__num {
  font-family: var(--fm);
  font-size: .65rem;
  color: var(--t3);
  min-width: 1.2rem;
  padding-top: .15rem;
}

.journey-step__text {
  font-size: .88rem;
  color: var(--t2);
  line-height: 1.55;
}

.journey-box--after .journey-step__text { color: var(--t1); }

.journey-step__time {
  font-family: var(--fm);
  font-size: .7rem;
  margin-top: 1rem;
}

.journey-box--before .journey-step__time { color: var(--a3); }
.journey-box--after .journey-step__time { color: var(--a1); }

/* ═══ NEXUS GRID ═══ */
.nexus-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--bdr);
  border: 1px solid var(--bdr);
  border-radius: 6px;
  margin: 3rem 0;
  overflow: hidden;
}

.nexus-card {
  background: var(--card);
  padding: 2rem 1.5rem;
}

.nexus-card__num {
  font-family: var(--fm);
  font-size: .62rem;
  color: var(--t3);
  margin-bottom: .75rem;
}

.nexus-card__title {
  font-weight: 600;
  font-size: .95rem;
  margin-bottom: .75rem;
  line-height: 1.3;
}

.nexus-card__body {
  font-size: .82rem;
  color: var(--t2);
  line-height: 1.6;
}

/* ═══ PHASE TIMELINE ═══ */
.phase-timeline { margin: 3rem 0; }

.phase-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 2rem;
  padding: 2rem 0;
  border-bottom: 1px solid var(--bdr);
  align-items: start;
}

.phase-item:last-child { border-bottom: none; }

.phase-item__label {
  font-family: var(--fm);
  font-size: .68rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--a1);
  padding-top: .2rem;
}

.phase-item__content h4 {
  font-family: var(--fd);
  font-size: 1.15rem;
  margin-bottom: .6rem;
  font-weight: 400;
}

.phase-item__content p {
  font-size: .88rem;
  color: var(--t2);
  line-height: 1.65;
}

/* ═══ LEADERSHIP GRID ═══ */
.leadership-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--bdr);
  border: 1px solid var(--bdr);
  border-radius: 6px;
  margin: 3rem 0;
  overflow: hidden;
}

.leadership-card {
  background: var(--card);
  padding: 2.5rem 2rem;
}

.leadership-card__icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  font-size: 1rem;
}

.leadership-card__icon--strategy { background: rgba(26, 107, 60, .08); color: var(--a1); }
.leadership-card__icon--design { background: rgba(43, 94, 167, .08); color: var(--a2); }
.leadership-card__icon--team { background: rgba(196, 85, 10, .08); color: var(--a3); }
.leadership-card__icon--collab { background: rgba(123, 75, 170, .08); color: var(--a4); }

.leadership-card__title {
  font-family: var(--fd);
  font-size: 1.2rem;
  margin-bottom: 1rem;
  font-weight: 400;
}

.leadership-card__list { list-style: none; }

.leadership-card__list li {
  font-size: .85rem;
  color: var(--t2);
  line-height: 1.6;
  padding: .35rem 0 .35rem 1rem;
  position: relative;
}

.leadership-card__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: .75rem;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--t3);
}

/* ═══ REFLECTIONS ═══ */
.reflection-item {
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--bdr);
}

.reflection-item:last-child { border-bottom: none; }

.reflection-item__title {
  font-family: var(--fd);
  font-size: 1.25rem;
  margin-bottom: .75rem;
  font-weight: 400;
}

.reflection-item__body {
  font-size: .95rem;
  color: var(--t2);
  line-height: 1.8;
  max-width: 680px;
}

/* ═══ TABLE SCROLL WRAPPER ═══ */
.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* ═══ CASE STUDY RESPONSIVE ═══ */
@media(max-width:900px) {
  .meta-strip__inner,
  .impact-banner__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .workshop-grid,
  .persona-grid,
  .collab-grid,
  .layer-diagram,
  .journey-compare,
  .leadership-grid {
    grid-template-columns: 1fr;
  }

  .nexus-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .cs-nav__toc {
    display: none;
  }

  .cs-card {
    flex-direction: column;
  }

  .cs-card__stats {
    flex-direction: row;
    border-left: none;
    border-top: 1px solid var(--bdr);
  }

  .cs-domain-nav {
    gap: 1.5rem;
  }

  .cs-domain-nav__name {
    font-size: 1.6rem;
  }

  .cs-domain-header__name {
    font-size: 1.6rem;
  }

  .case-hero {
    min-height: auto;
    padding: 7rem 2rem 4rem;
  }

  .case-hero__subtitle {
    font-size: 1rem;
  }
}

@media(max-width:600px) {
  .meta-strip__inner,
  .impact-banner__grid,
  .nexus-grid {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 4rem 0;
  }

  .phase-item {
    grid-template-columns: 1fr;
    gap: .5rem;
  }

  .cs-domain-nav {
    gap: 1rem;
    padding: 0 1rem;
  }

  .cs-domain-nav__name {
    font-size: 1.2rem;
  }

  .cs-domain-nav__prefix {
    display: none;
  }

  .cs-domain-nav__colon {
    display: none;
  }

  .cs-domain-header__name {
    font-size: 1.4rem;
  }

  .cs-domain-header__prefix {
    font-size: .65rem;
  }

  .cs-card__content {
    padding: 1.5rem;
  }

  .cs-card__title {
    font-size: 1.3rem;
  }

  .cs-card__meta {
    gap: 1.5rem;
  }

  .cs-card__stats {
    padding: 1.5rem;
    flex-wrap: wrap;
  }

  .case-hero {
    padding: 6rem 1.25rem 3rem;
  }

  .case-hero__title {
    font-size: clamp(2rem, 6vw, 5.5rem);
  }

  .case-hero__subtitle {
    font-size: .92rem;
  }

  .cs-nav {
    padding: .75rem 1rem;
  }

  .pv-nav {
    padding: .75rem 1rem;
  }

  .pv-hero {
    padding: 5rem 1.25rem 1.5rem;
  }

  .callout {
    padding: 1.25rem 1.25rem;
  }

  .impact-banner {
    padding: 3rem 0;
  }

  .impact-banner__number {
    font-size: 2rem;
  }

  .workshop-card {
    padding: 1.75rem 1.25rem;
  }

  .collab-item {
    padding: 1.5rem 1.25rem;
  }

  .persona-card {
    padding: 1.75rem 1.25rem;
  }

  .leadership-card {
    padding: 1.75rem 1.25rem;
  }

  .layer-block {
    padding: 2rem 1.5rem;
  }

  .journey-box {
    padding: 2rem 1.5rem;
  }

  /* Full-bleed images — prevent overflow */
  .case-img--full {
    margin-left: 0 !important;
    margin-right: 0 !important;
    width: 100% !important;
  }
}

/* ═══ VIBE LIST — Vibe Coding Page ═══ */

.vibe-list {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 2rem 6rem;
  display: flex;
  flex-direction: column;
  gap: .6rem;
}

.vibe-list__card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: .55rem 1rem;
  border: 1px solid var(--bdr);
  border-radius: 8px;
  background: var(--card);
  text-decoration: none;
  color: inherit;
  cursor: pointer;
  transition: background .25s ease, border-color .25s ease, box-shadow .25s ease;
}

.vibe-list__card:hover {
  background: var(--card-h);
  border-color: rgba(26,107,60,.15);
  box-shadow: 0 2px 12px rgba(0,0,0,.04);
}

.vibe-list__card-img {
  width: 56px;
  height: 56px;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--bdr);
  flex-shrink: 0;
  opacity: .9;
  transition: opacity .25s ease;
}

.vibe-list__card:hover .vibe-list__card-img {
  opacity: 1;
}

.vibe-list__card-text {
  flex: 1;
  min-width: 0;
}

.vibe-list__card-header {
  display: flex;
  align-items: center;
  gap: .6rem;
  margin-bottom: .2rem;
}

.vibe-list__card-name {
  font-family: var(--fd);
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--t1);
  line-height: 1.3;
}

.vibe-list__card-tags {
  display: flex;
  gap: .35rem;
  flex-shrink: 0;
}

.vibe-list__card-tag {
  font-family: var(--fm);
  font-size: .5rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--t3);
  background: var(--bg2);
  padding: .2rem .5rem;
  border-radius: 4px;
  white-space: nowrap;
  border: 1px solid var(--bdr);
}

.vibe-list__card-desc {
  font-size: .85rem;
  color: var(--t2);
  line-height: 1.5;
  margin-top: .3rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.vibe-list__card-arrow {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--t3);
  font-size: 1.1rem;
  transition: transform .3s ease, color .3s ease;
}

.vibe-list__card:hover .vibe-list__card-arrow {
  color: var(--a1);
  transform: translateX(4px);
}

/* Hidden card for filter/search */
.vibe-list__card--hidden {
  display: none;
}

/* ═══ Vibe Toolbar — Search & Filters ═══ */
.vibe-toolbar {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 2rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.vibe-toolbar__search {
  flex: 0 0 240px;
  position: relative;
}

.vibe-toolbar__search-icon {
  position: absolute;
  left: .75rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--t3);
  pointer-events: none;
  display: flex;
}

.vibe-toolbar__search-input {
  width: 100%;
  padding: .5rem .75rem .5rem 2.1rem;
  border: 1px solid var(--bdr);
  border-radius: 6px;
  background: var(--card);
  color: var(--t1);
  font-family: var(--fb);
  font-size: .82rem;
  outline: none;
  transition: border-color .25s ease;
}

.vibe-toolbar__search-input::placeholder {
  color: var(--t3);
}

.vibe-toolbar__search-input:focus {
  border-color: var(--a1);
}

.vibe-toolbar__filters {
  display: flex;
  gap: .4rem;
  flex-wrap: wrap;
}

.vibe-toolbar__filter {
  font-family: var(--fm);
  font-size: .52rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--t3);
  background: var(--card);
  border: 1px solid var(--bdr);
  padding: .35rem .65rem;
  border-radius: 4px;
  cursor: pointer;
  transition: all .2s ease;
  white-space: nowrap;
}

.vibe-toolbar__filter:hover {
  color: var(--t2);
  border-color: var(--t3);
}

.vibe-toolbar__filter--active {
  color: var(--a1);
  border-color: var(--a1);
  background: rgba(26,107,60,.05);
}

/* ═══ Vibe List Responsive ═══ */
@media (max-width: 768px) {
  .vibe-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .vibe-toolbar__search {
    flex: none;
  }
}

@media (max-width: 600px) {
  .vibe-list {
    padding: 0 1rem 4rem;
  }

  .vibe-toolbar {
    padding: 0 1rem 1rem;
  }

  .vibe-list__card-desc {
    display: none;
  }

  .vibe-list__card-img {
    width: 44px;
    height: 44px;
  }

  .vibe-list__card-tags {
    display: none;
  }
}

/* ═══ MOBILE — 375px (Small Phones) ═══ */
@media (max-width: 375px) {
  .section {
    padding: 2.5rem 0;
  }

  .section__title {
    font-size: 1.4rem;
  }

  .case-hero__title {
    font-size: clamp(1.6rem, 5vw, 2.5rem);
  }

  .impact-banner {
    padding: 2rem 0;
  }

  .impact-banner__number {
    font-size: 1.6rem;
  }

  .cs-domain-nav__name {
    font-size: 1rem;
  }

  .cs-domain-header__name {
    font-size: 1.2rem;
  }

  .pv-hero__title {
    font-size: 1.6rem;
  }
}

/* ═══ MOBILE — Full-bleed image overflow fix ═══ */
@media (max-width: 768px) {
  [style*="width:100vw"],
  [style*="width: 100vw"] {
    width: 100% !important;
    margin-left: 0 !important;
    margin-right: 0 !important;
  }

  [style*="calc(33.333%"] {
    flex: 1 1 100% !important;
    max-width: 100% !important;
  }

  .persona-grid[style] {
    grid-template-columns: 1fr !important;
  }

  .table-scroll table {
    font-size: .8rem;
  }

  .table-scroll table td,
  .table-scroll table th {
    padding: .5rem .35rem;
  }
}