/* ============================================
   Mona Sans — variable font (wdth 75–125%, wght 200–900, opsz, ital)
   ============================================ */
@font-face {
  font-family: 'Mona Sans';
  src: url('assets/fonts/MonaSansVF.woff2') format('woff2 supports variations'),
       url('assets/fonts/MonaSansVF.woff2') format('woff2');
  font-weight: 200 900;
  font-stretch: 75% 125%;
  font-style: normal;
  font-optical-sizing: auto;
  font-display: swap;
}

@font-face {
  font-family: 'Mona Sans';
  src: url('assets/fonts/MonaSansVF.woff2') format('woff2 supports variations'),
       url('assets/fonts/MonaSansVF.woff2') format('woff2');
  font-weight: 200 900;
  font-stretch: 75% 125%;
  font-style: italic;
  font-optical-sizing: auto;
  font-display: swap;
}

/* ============================================
   CSS Variables
   ============================================ */
:root {
  --color-bg: #faf9f7;
  --color-surface: #f2f0ec;
  --color-text: #1a1916;
  --color-text-muted: #6b6860;
  --color-text-faint: #a8a49e;
  --color-accent: #b5603a;
  --color-accent-light: rgba(181, 96, 58, 0.08);
  --color-border: #e4e1db;
  --color-white: #ffffff;
  --color-persona-challenge: #9A4A4A;

  --font-display: 'Mona Sans', system-ui, sans-serif;
  --font-body:    'Mona Sans', system-ui, sans-serif;

  --size-xs: 0.75rem;
  --size-sm: 0.875rem;
  --size-base: 1rem;
  --size-md: 1.125rem;
  --size-lg: 1.25rem;
  --size-xl: 1.5rem;
  --size-2xl: 2rem;
  --size-3xl: 2.75rem;
  --size-4xl: 3.75rem;
  --size-5xl: 5rem;

  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 4rem;
  --space-7: 6rem;
  --space-8: 8rem;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;

  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;

  --max-content: 1160px;
  --max-prose: 680px;
  --nav-height: 72px;
}

/* ============================================
   Reset & Base
   ============================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--size-md);
  line-height: 1.75;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  font-stretch: 100%;
  line-height: 1.15;
  font-optical-sizing: auto;
}

/* Page headline — case study & article titles, and the homepage About / Publications headings */
h1,
.about-heading,
.publications-heading { font-size: clamp(var(--size-3xl), 6vw, var(--size-5xl)); font-weight: 800; letter-spacing: -0.03em; }
h2 { font-size: clamp(var(--size-2xl), 4vw, var(--size-3xl)); letter-spacing: -0.02em; }
h3 { font-size: clamp(var(--size-xl), 3vw, var(--size-2xl)); letter-spacing: -0.01em; }
h4 { font-size: var(--size-xl); letter-spacing: -0.01em; }

p { max-width: 68ch; }

.label {
  font-size: var(--size-xs);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

/* Eyebrow labels — case-study / article metadata, the Contents heading, the
   Key Insights and Personas table headers (and Personas' mobile labels), and
   Next project / Next article. Sentence case as written in the source, so
   acronyms (UX/UI, B2B) keep their capitals. Colours and spacing stay with
   each component's own rule. */
.cs-meta-item .label,
.cs-toc h4,
.cs-key-insights__header-cell,
.cs-personas-table__header-cell,
.cs-personas-table__mobile-label,
.cs-next .label {
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.02em;   /* same as the .link-arrow CTAs ("Read case study") */
  text-transform: none;
}

.accent { color: var(--color-accent); }

/* ============================================
   Layout Utilities
   ============================================ */
.container {
  width: 100%;
  max-width: var(--max-content);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

.section {
  padding-block: var(--space-8);
}

/* ============================================
   Scroll Fade-In
   ============================================ */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   Navigation
   ============================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  transition: background-color var(--transition-base), border-color var(--transition-base);
}

.nav.scrolled {
  background-color: rgba(250, 249, 247, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-content);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

.nav__logo {
  font-family: var(--font-display);
  font-size: var(--size-xl);
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--color-text);
  transition: color var(--transition-fast);
}

.nav__logo:hover { color: var(--color-accent); }

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nav__links a {
  font-size: var(--size-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
  transition: color var(--transition-fast);
}

.nav__links a:hover { color: var(--color-text); }

.nav__cta {
  font-size: var(--size-sm) !important;
  font-weight: 600 !important;
  color: var(--color-accent) !important;
  border: 1px solid var(--color-accent);
  padding: 0.4em 1.1em;
  border-radius: 100px;
  transition: background-color var(--transition-fast), color var(--transition-fast) !important;
}

.nav__cta:hover {
  background-color: var(--color-accent);
  color: var(--color-white) !important;
}

.nav__cta[aria-expanded="true"] {
  background-color: var(--color-accent);
  color: var(--color-white) !important;
}

/* ── Contact drawer (case study nav only) ── */
.nav__contact-wrap {
  position: relative;
}

.contact-drawer {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  width: 264px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
  padding: 4px 20px;
  z-index: 200;
}

.contact-drawer[hidden] { display: none; }

.contact-drawer__row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 0;
  color: var(--color-text-muted);
  font-size: var(--size-sm);
  font-weight: 500;
  border-bottom: 1px solid var(--color-border);
  transition: color var(--transition-fast);
  text-decoration: none;
}

.contact-drawer__row:last-child { border-bottom: none; }

.contact-drawer__row:hover { color: var(--color-text); }

@media (max-width: 768px) {
  .contact-drawer {
    width: min(264px, calc(100vw - var(--space-4) * 2));
    right: 0;
  }
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
  padding-top: calc(var(--nav-height) + var(--space-8));
  padding-bottom: var(--space-7);
  min-height: 90vh;
  display: flex;
  align-items: center;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-7);
  align-items: center;
}

.hero__tag {
  display: inline-block;
  font-size: var(--size-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  background: var(--color-accent-light);
  padding: 0.35em 0.85em;
  border-radius: 100px;
  margin-bottom: var(--space-3);
}

.hero__title {
  margin-bottom: var(--space-3);
  color: var(--color-text);
}

.hero__title em {
  font-style: italic;
  color: var(--color-accent);
}

.hero__subtitle {
  font-size: var(--size-lg);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-4);
  max-width: 44ch;
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-size: var(--size-sm);
  font-weight: 600;
  padding: 0.75em 1.75em;
  border-radius: 100px;
  border: 1.5px solid transparent;
  transition: all var(--transition-fast);
  letter-spacing: 0.02em;
}

.btn--primary {
  background: var(--color-text);
  color: var(--color-white);
  border-color: var(--color-text);
}

.btn--primary:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text-muted);
  border-color: var(--color-border);
}

.btn--ghost:hover {
  border-color: var(--color-text-muted);
  color: var(--color-text);
}

.hero__image {
  position: relative;
}

.hero__image-frame {
  width: 800px;
  height: 600px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface);
  position: relative;
}

.hero__image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(15%);
}

.hero__image-badge {
  position: absolute;
  bottom: var(--space-3);
  left: var(--space-3);
  background: rgba(250, 249, 247, 0.92);
  backdrop-filter: blur(8px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-3);
}

.hero__image-badge p {
  font-size: var(--size-sm);
  font-weight: 600;
  color: var(--color-text);
  max-width: unset;
}

.hero__image-badge span {
  font-size: var(--size-xs);
  color: var(--color-text-muted);
}

/* ============================================
   Stats Row
   ============================================ */
.stats {
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding-block: var(--space-4);
}

.stats__inner {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.stat__number {
  font-family: var(--font-display);
  font-size: var(--size-2xl);
  font-weight: 800;
  font-stretch: 87.5%;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.stat__label {
  font-size: var(--size-sm);
  color: var(--color-text-muted);
}

/* ============================================
   Work Grid Section
   ============================================ */
.work-section {
  padding-block: var(--space-8);
}

.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: var(--space-5);
  gap: var(--space-3);
  flex-wrap: wrap;
}

.section-header__text p {
  color: var(--color-text-muted);
  font-size: var(--size-base);
  margin-top: var(--space-1);
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  font-size: var(--size-sm);
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.02em;
  transition: gap var(--transition-fast);
}

.link-arrow:hover { gap: 0.65em; }

.work-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-3);
}

.project-card {
  position: relative;
  cursor: pointer;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface);
}

.project-card--large { grid-column: span 7; }
.project-card--medium { grid-column: span 5; }
.project-card--half { grid-column: span 6; }

.project-card__image {
  aspect-ratio: 4/3;
  overflow: hidden;
  position: relative;
}

.project-card--large .project-card__image { aspect-ratio: 16/10; }

.project-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.project-card:hover .project-card__image img {
  transform: scale(1.04);
}

.project-card__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(26, 25, 22, 0.75) 0%, transparent 50%);
  opacity: 0;
  transition: opacity var(--transition-base);
  display: flex;
  align-items: flex-end;
  padding: var(--space-3);
}

.project-card:hover .project-card__overlay { opacity: 1; }

.project-card__overlay-content {
  color: var(--color-white);
}

.project-card__overlay-content .label {
  color: rgba(255,255,255,0.7);
  margin-bottom: 0.3em;
}

.project-card__overlay-content h3 {
  font-size: var(--size-lg);
  color: var(--color-white);
  line-height: 1.2;
}

.project-card__meta {
  padding: var(--space-2) var(--space-3) var(--space-3);
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.project-card__category {
  font-size: var(--size-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.project-card__title {
  font-family: var(--font-display);
  font-size: var(--size-xl);
  font-weight: 500;
  color: var(--color-text);
}

.project-card__subtitle {
  font-size: var(--size-sm);
  color: var(--color-text-muted);
}

.project-card__expand-btn {
  position: absolute;
  top: var(--space-2);
  right: var(--space-2);
  width: 36px;
  height: 36px;
  background: rgba(250, 249, 247, 0.9);
  backdrop-filter: blur(8px);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-base), transform var(--transition-fast);
  color: var(--color-text);
}

.project-card:hover .project-card__expand-btn {
  opacity: 1;
}

.project-card__expand-btn:hover {
  transform: scale(1.1);
}

/* ============================================
   About Section
   ============================================ */
.about-section {
  padding-block: var(--space-8);
  background: var(--color-surface);
}

.about__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-7);
  align-items: start;
}

.about__content .label {
  display: block;
  margin-bottom: var(--space-2);
}

.about__content h2 {
  margin-bottom: var(--space-3);
}

.about__content p {
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: var(--space-2);
}

.about__details {
  padding-top: var(--space-2);
}

.tools-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4) var(--space-5);
  margin-top: var(--space-3);
}

.tools-group h4 {
  font-family: var(--font-body);
  font-size: var(--size-sm);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.tools-group ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
}

.tools-group li {
  font-size: var(--size-sm);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  padding: 0.25em 0.85em;
  color: var(--color-text-muted);
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.tools-group li:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.about__image {
  position: sticky;
  top: calc(var(--nav-height) + var(--space-4));
}

.about__image-frame {
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 3/4;
  background: var(--color-border);
}

.about__image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(20%);
}

.about__quote {
  margin-top: var(--space-3);
  padding: var(--space-3);
  border-left: 2px solid var(--color-accent);
}

.about__quote p {
  font-family: var(--font-display);
  font-size: var(--size-xl);
  font-style: italic;
  color: var(--color-text);
  line-height: 1.5;
  max-width: unset;
}

/* ============================================
   Contact / Footer
   ============================================ */
.contact-section {
  padding-block: var(--space-8);
  text-align: center;
}

.contact-section h2 {
  margin-bottom: var(--space-2);
}

.contact-section > .container > p {
  font-size: var(--size-lg);
  color: var(--color-text-muted);
  max-width: 50ch;
  margin-inline: auto;
  margin-bottom: var(--space-4);
}

.contact-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-size: var(--size-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  padding: 0.65em 1.5em;
  border-radius: 100px;
  transition: all var(--transition-fast);
}

.contact-link:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.contact-link--primary {
  background: var(--color-text);
  color: var(--color-white);
  border-color: var(--color-text);
}

.contact-link--primary:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-white);
}

footer {
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-4);
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.footer__left {
  font-family: var(--font-display);
  font-size: var(--size-lg);
  font-weight: 500;
}

.footer__right {
  font-size: var(--size-sm);
  color: var(--color-text-faint);
}

/* ============================================
   Lightbox
   ============================================ */
/* ── Stage 1: fit to viewport ── */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
  overflow-x: hidden;
}

.lightbox.active {
  opacity: 1;
  pointer-events: all;
}

.lightbox__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.92);
  backdrop-filter: blur(3px);
  cursor: pointer;
}

.lightbox__content {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  transform: scale(0.97);
  transition: transform var(--transition-base);
}

.lightbox.active .lightbox__content {
  transform: scale(1);
}

.lightbox__image-wrap {
  line-height: 0;
}

.lightbox__img {
  display: block;
  max-height: 88vh;
  max-width: 82vw;
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: var(--radius-md);
  cursor: zoom-in;
}

/* Prev / next arrows */
.lightbox__arrow {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  cursor: pointer;
  flex-shrink: 0;
  transition: background var(--transition-fast);
}
.lightbox__arrow:hover { background: rgba(255, 255, 255, 0.22); }

/* Fixed UI (zoom + close) — persists in both stages */
.lightbox__ui {
  position: fixed;
  top: 1.25rem;
  right: 1.25rem;
  z-index: 1002;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}
.lightbox.active .lightbox__ui {
  opacity: 1;
  pointer-events: all;
}

.lightbox__zoom-btn,
.lightbox__close {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(16, 16, 16, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background var(--transition-fast);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.lightbox__zoom-btn:hover,
.lightbox__close:hover { background: rgba(40, 40, 40, 0.9); }

/* ── Stage 2: full resolution / scrollable ── */
.lightbox.is-zoomed {
  overflow-x: hidden;   /* horizontal scrolling must never occur */
  overflow-y: auto;     /* vertical scrolling is allowed once the image grows past the viewport */
  align-items: flex-start;
  justify-content: flex-start;
  background: #000;
  -webkit-overflow-scrolling: touch;
}

.lightbox.is-zoomed .lightbox__backdrop { display: none; }

.lightbox.is-zoomed .lightbox__content {
  width: 100%;   /* 100% of .lightbox's own content box — correctly excludes its scrollbar gutter, unlike 100vw */
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  padding: 2rem 0;   /* vertical breathing room only — horizontal padding would push the image past the container's width */
  transform: none;
  cursor: zoom-out;
}

.lightbox.is-zoomed .lightbox__image-wrap {
  min-width: 0;   /* let the flex item shrink below its content size instead of forcing overflow */
  max-width: 100%;
}

.lightbox.is-zoomed .lightbox__img {
  max-height: none;   /* height grows naturally, driving the vertical scroll */
  max-width: 100%;     /* capped to the wrap's (i.e. the viewport's) width; width/height both auto preserve aspect ratio */
  width: auto;
  height: auto;
  border-radius: 0;
  cursor: zoom-out;
}

.lightbox.is-zoomed .lightbox__arrow { display: none; }

/* ============================================
   Case Study Page Styles
   ============================================ */
.cs-hero {
  padding-top: calc(var(--nav-height) + var(--space-7));
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--color-border);
}

.cs-hero__eyebrow {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.cs-hero__category {
  font-size: var(--size-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  background: var(--color-accent-light);
  padding: 0.35em 0.85em;
  border-radius: 100px;
}

.cs-hero h1 {
  max-width: 16ch;
  margin-bottom: var(--space-4);
}

.cs-hero__summary {
  font-size: var(--size-lg);
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: var(--max-prose);
}

/* Article author/date/read-time row — subtle, text-only besides the avatar */
.cs-author-meta {
  display: flex;
  align-items: center;
  gap: 0.6em;
  margin-top: var(--space-3);
}

.cs-author-meta__avatar {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.cs-author-meta__text {
  font-size: var(--size-sm);
  color: var(--color-text-muted);
}

.cs-meta {
  display: flex;
  gap: var(--space-5);
  flex-wrap: wrap;
  padding-block: var(--space-3);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  margin-top: var(--space-4);
}

.cs-meta-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.cs-meta-item .label { margin-bottom: 0; }

.cs-meta-item p {
  font-size: var(--size-base);
  font-weight: 500;
  color: var(--color-text);
  max-width: unset;
}

.cs-hero-image {
  padding-block: var(--space-5);
}

.cs-hero-image img {
  display: block;
  width: 100%;
  max-width: 1025px;
  height: auto;
  border-radius: var(--radius-lg);
  margin-inline: auto;
}

/* Article/publication hero — narrower than the case-study hero above, since
   here the image is an editorial/abstract support image rather than a
   primary design artifact. Case-study hero is untouched (still 1025px). */
.cs-hero-image--article img {
  max-width: 800px;
}

.cs-prose .cs-hero-image--medium {
  width: 800px;
  margin-inline: calc((100% - 800px) / 2);
}

/* Consecutive standalone images sit closer together (~64px) than the
   spacing before headings/paragraphs, which keeps its full padding-block. */
.cs-hero-image:has(+ .cs-hero-image) {
  padding-bottom: 32px;
}

.cs-hero-image + .cs-hero-image {
  padding-top: 32px;
}

.cs-hero-image--medium img {
  width: 800px;
  height: 600px;
  object-fit: cover;
}

/* Case Study Body */
.cs-body {
  padding-block: var(--space-7);
}

.cs-body__inner {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: var(--space-7);
  align-items: start;
}

.cs-toc {
  position: sticky;
  top: calc(var(--nav-height) + var(--space-4));
}

.cs-toc h4 {
  font-family: var(--font-body);
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.cs-toc ul {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.cs-toc a {
  font-size: var(--size-sm);
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 0.5em;
}

.cs-toc a::before {
  content: '';
  display: inline-block;
  width: 20px;
  height: 1px;
  background: var(--color-border);
  transition: width var(--transition-fast), background var(--transition-fast);
}

.cs-toc a:hover,
.cs-toc a.active {
  color: var(--color-accent);
}

.cs-toc a:hover::before,
.cs-toc a.active::before {
  width: 28px;
  background: var(--color-accent);
}

.cs-prose {
  max-width: var(--max-prose);
}

.cs-prose section {
  scroll-margin-top: calc(var(--nav-height) + var(--space-3));
}

.cs-prose h2 {
  font-size: var(--size-2xl);
  margin-top: calc(var(--space-6) + 20px);
  margin-bottom: var(--space-2);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.cs-prose > section:first-of-type h2 { margin-top: 0; border-top: none; padding-top: 0; }

.cs-prose h3 {
  font-size: var(--size-xl);
  margin-top: var(--space-4);
  margin-bottom: var(--space-2);
}

.cs-prose p {
  color: var(--color-text-muted);
  font-size: var(--size-md);
  line-height: 1.8;
  margin-bottom: var(--space-3);
}

/* Preserve line breaks typed in the editor's paragraph textarea, without
   splitting into separate paragraph blocks. */
.cs-prose p.cs-paragraph {
  white-space: pre-line;
}

.cs-prose ul, .cs-prose ol {
  margin-bottom: var(--space-3);
  padding-left: var(--space-3);
  color: var(--color-text-muted);
  font-size: var(--size-md);
  line-height: 1.8;
}

.cs-prose ul { list-style: disc; }
.cs-prose ol { list-style: decimal; }
.cs-prose li { margin-bottom: 0.4em; }

/* Carousel — Standard inside prose: fixed 680×480, centered on the
   prose column's midpoint regardless of the column's rendered width. */
.cs-prose .cs-carousel:not(.cs-carousel--big) {
  width: 680px;
  margin-inline: calc((100% - 680px) / 2);
}

.cs-prose .cs-carousel:not(.cs-carousel--big) .cs-carousel__slide img {
  height: 480px;
  object-fit: cover;
}

/* Carousel — Big: 800×600, self-contained, works in prose and standalone. */
.cs-carousel--big {
  width: 800px;
  margin-inline: calc((100% - 800px) / 2);
}

.cs-carousel--big .cs-carousel__slide img {
  height: 600px;
  object-fit: cover;
}

.cs-callout {
  background: var(--color-accent-light);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: var(--space-3) var(--space-4);
  margin-block: var(--space-4);
}

.cs-callout p {
  color: var(--color-text) !important;
  font-family: var(--font-display);
  font-size: var(--size-xl) !important;
  font-weight: 600;
  font-stretch: 87.5%;
  font-style: italic;
  margin: 0 !important;
}

/* Carousel */
.cs-carousel {
  margin-block: var(--space-5);
  overflow: hidden;
}

.cs-carousel--fullwidth {
  width: 100vw;
  margin-left: calc(-1 * ((100vw - var(--max-content)) / 2) - var(--space-4));
}

.cs-carousel__track-wrap {
  overflow: hidden;
  border-radius: var(--radius-lg);
}

.cs-carousel__track {
  display: flex;
  transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.cs-carousel__slide {
  flex: 0 0 100%;
  position: relative;
}

.cs-carousel__slide img {
  width: 100%;
  height: auto;
  object-fit: cover;
  cursor: zoom-in;
}

.cs-carousel__slide--wide img { max-height: 70vh; }

.cs-carousel__controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--space-2);
}

.cs-carousel__dots {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.cs-carousel__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-border);
  cursor: pointer;
  transition: background var(--transition-fast), width var(--transition-fast);
  border: none;
}

.cs-carousel__dot.active {
  width: 24px;
  border-radius: 4px;
  background: var(--color-accent);
}

.cs-carousel__btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  color: var(--color-text);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  background: var(--color-bg);
  font-size: 1rem;
  text-decoration: none;
}

.cs-carousel__btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.cs-carousel__arrows {
  display: flex;
  gap: 0.5rem;
}

/* Image grid inside case study */
.cs-image-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2);
  margin-block: var(--space-4);
}

.cs-image-grid img {
  border-radius: var(--radius-md);
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  cursor: zoom-in;
  transition: filter var(--transition-fast);
}

.cs-image-grid img:hover { filter: brightness(0.95); }

/* Results grid */
.results-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
  margin-block: var(--space-4);
}

.result-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
}

.result-card__number {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: var(--size-3xl);
  font-weight: 800;
  font-stretch: 87.5%;
  color: rgb(17, 17, 17);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 0.25rem;
}

.result-card__label {
  font-size: var(--size-sm);
  color: var(--color-text-muted);
  max-width: unset;
}

/* Info List Card */
.cs-info-list-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  box-sizing: border-box;
  width: 100%;
  max-width: var(--max-prose);
  background: #fafafa;
  border-radius: var(--radius-md);
  padding: 32px;
  margin-bottom: var(--space-3);
}

.cs-info-list-card h3 {
  margin-top: 0;
  width: 100%;
}

.cs-info-list-card ul {
  width: 100%;
  margin-bottom: 0;
}

/* Personas / User Roles */
.cs-personas-table {
  margin-top: 32px;
  margin-bottom: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.cs-personas-table__header {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-bottom: 1px solid var(--color-border);
  padding-block: 12px;
}

.cs-personas-table__header-cell {
  color: var(--color-text-muted);
  padding-inline: var(--space-4);
}

.cs-personas-table__row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-bottom: 1px solid var(--color-border);
}

.cs-personas-table__row:last-child { border-bottom: none; }

.cs-personas-table__cell {
  padding-block: var(--space-3);
  padding-inline: var(--space-4);
  min-width: 0;
}

.cs-personas-table__cell--goal,
.cs-personas-table__cell--challenge {
  border-left: 1px solid var(--color-border);
}

.cs-personas-table__avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--color-border);
  margin-bottom: 12px;
}

.cs-personas-table__avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
  display: block;
}

.cs-personas-table__name {
  font-family: var(--font-display);
  font-size: var(--size-md);
  font-weight: 700;
  letter-spacing: 0px;
  color: var(--color-text);
  margin: 0 0 var(--space-1);
}

.cs-personas-table .cs-personas-table__quote {
  font-style: italic;
  font-variation-settings: 'ital' 1;
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 20px;
  margin: 0;
  max-width: unset;
}

.cs-personas-table__mobile-label {
  display: none;
  color: var(--color-text-muted);
  margin-bottom: var(--space-1);
}

.cs-personas-table .cs-personas-table__goal,
.cs-personas-table .cs-personas-table__challenge {
  font-size: var(--size-md);
  font-weight: 500;
  line-height: 1.6;
  margin: 0;
  max-width: unset;
}

.cs-personas-table .cs-personas-table__goal { color: var(--color-text); }
.cs-personas-table .cs-personas-table__challenge { color: var(--color-persona-challenge); }

/* Next project */
.cs-next {
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-6);
}

.cs-next__inner {
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
  gap: var(--space-4);
}

.cs-next__inner > .cs-next__link { order: 1; }

.cs-next__text {
  order: 2;
  max-width: 460px;
}

.cs-next .label { display: block; margin-bottom: var(--space-2); }

.cs-next h3 {
  font-size: var(--size-2xl);
  transition: color var(--transition-fast);
}

.cs-next__link:hover h3 { color: var(--color-accent); }

.cs-next__image {
  width: 340px;
  flex-shrink: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.cs-next__image img {
  width: 100%;
  aspect-ratio: 3/2;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.cs-next__link:hover .cs-next__image img { transform: scale(1.05); }

/* Key Insights Table */
.cs-key-insights {
  margin-block: var(--space-4);
}

.cs-key-insights__title {
  font-family: var(--font-display);
  font-size: var(--size-lg);
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 var(--space-2);
}

.cs-key-insights__table {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.cs-key-insights__header {
  display: grid;
  grid-template-columns: 1fr 2.5rem 1fr;
  align-items: center;
  padding: 12px var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.cs-key-insights__header-cell {
  color: var(--color-text-muted);
}

.cs-key-insights__header-cell:first-child { padding-right: var(--space-2); }
.cs-key-insights__header-cell:last-child { padding-left: var(--space-2); }

.cs-key-insights__row {
  display: grid;
  grid-template-columns: 1fr 2.5rem 1fr;
  align-items: start;
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.cs-key-insights__row:last-child { border-bottom: none; }

.cs-key-insights__row:nth-child(even) {
  background: var(--color-surface);
}

.cs-key-insights__finding {
  font-size: var(--size-base);
  color: var(--color-text-muted);
  line-height: 1.65;
  margin: 0;
  padding-right: var(--space-2);
}

.cs-key-insights__arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  font-size: 22px;
  line-height: 1.65rem;
  flex-shrink: 0;
  user-select: none;
}

.cs-key-insights__insight {
  font-size: var(--size-base);
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.65;
  margin: 0;
  padding-left: var(--space-2);
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 1024px) {
  .hero__inner { grid-template-columns: 1fr; }
  .hero__image { display: none; }
  .about__inner { grid-template-columns: 1fr; }
  .about__image { display: none; }
  .cs-body__inner { grid-template-columns: 1fr; }
  .cs-toc { display: none; }
  .cs-carousel--fullwidth { width: 100%; margin-left: 0; }

  .cs-personas-table__header { display: none; }

  .cs-personas-table__row {
    grid-template-columns: 1fr;
    padding-block: var(--space-3) var(--space-4);
    padding-inline: var(--space-3);
  }

  .cs-personas-table__cell {
    padding-inline: 0;
    padding-block: var(--space-1);
    border-left: none;
  }

  .cs-personas-table__cell--user { padding-top: 0; }
  .cs-personas-table__cell--challenge { padding-bottom: 0; }

  .cs-personas-table__mobile-label { display: block; }
}

@media (max-width: 768px) {
  :root {
    --space-8: 5rem;
    --space-7: 4rem;
  }

  .work-grid {
    grid-template-columns: 1fr;
  }

  .project-card--large,
  .project-card--medium,
  .project-card--half {
    grid-column: span 1;
  }

  .project-card__body {
    position: static;
    background: none;
    opacity: 1;
    padding: 16px 18px 20px;
  }

  .project-card__title { color: #111; }
  .project-card__subtitle { color: #555; }
  .project-card__link { color: #3730a3; }

  .nav__links { display: none; }

  .stats__inner { gap: var(--space-4); }

  .tools-grid { grid-template-columns: 1fr; }

  .results-grid { grid-template-columns: 1fr; }

  .cs-info-list-card { padding: 24px; }

  .cs-key-insights__header { display: none; }

  .cs-key-insights__row {
    grid-template-columns: 1fr;
    gap: var(--space-1);
    padding: var(--space-3);
  }

  .cs-key-insights__arrow {
    justify-content: flex-start;
    font-size: var(--size-base);
  }

  .cs-key-insights__finding,
  .cs-key-insights__insight {
    padding-inline: 0;
  }

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

  .cs-meta { gap: var(--space-3); }

  .cs-next__inner { flex-direction: column; align-items: flex-start; }
  .cs-next__inner > .cs-next__link { order: 0; }
  .cs-next__text { order: 0; max-width: none; }
  .cs-next__image { width: 100%; }

  .cs-hero-image img {
    width: 100%;
    height: auto;
    margin-inline: 0;
  }

  /* ── C2: Carousel overflow — collapse both fixed-width variants ── */
  .cs-prose .cs-carousel:not(.cs-carousel--big),
  .cs-carousel--big {
    width: 100%;
    margin-inline: 0;
  }

  /* ── C2 (cont.): Inline body image — same fixed-width pattern ── */
  .cs-prose .cs-hero-image--medium {
    width: 100%;
    margin-inline: 0;
  }

  .cs-hero-image--medium img {
    width: 100%;
    height: auto;
    aspect-ratio: 4 / 3;
  }

  /* ── C2 (Safari): explicit track-wrap width + slide min-width prevents flex overflow ── */
  .cs-carousel__track-wrap {
    width: 100%;
    max-width: 100%;
  }

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

  /* ── C3: Carousel image heights — replace fixed px heights with fluid ratio ── */
  .cs-prose .cs-carousel:not(.cs-carousel--big) .cs-carousel__slide img,
  .cs-carousel--big .cs-carousel__slide img {
    height: auto;
    aspect-ratio: 4 / 3;
  }

  /* ── I1: Lightbox arrows — overlay on image instead of beside it ── */
  .lightbox__content {
    gap: 0;
  }

  .lightbox__img {
    max-width: 96vw;
  }

  .lightbox__arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 2;
    background: rgba(0, 0, 0, 0.45);
    border-color: rgba(255, 255, 255, 0.2);
  }

  .lightbox__arrow[data-lb-prev] { left: var(--space-2); }
  .lightbox__arrow[data-lb-next] { right: var(--space-2); }
}