:root {
  /* Color — Deep Navy / Amber / White, no paper or cream tones anywhere.
     Contrast verified against --color-bg (#FFFFFF), sRGB relative-luminance method:
     --color-ink      13.2:1  (AAA)
     --color-ink-dim   7.5:1  (AAA)
     --color-muted     4.6:1  (AA — thin margin, don't lighten further)
     --color-accent    5.8:1  (AA — safe for body-size text/links)
     --color-accent-strong 3.8:1 (fails AA for normal text — large/bold text and graphic
       fills only, e.g. big stat numbers at 24px+/700 weight, which only need 3:1) */
  --color-ink: #16324A;
  --color-ink-dim: #4A5568;
  --color-muted: #6B7680;
  --color-bg: #FFFFFF;
  --color-surface: #F7F8F9;
  --color-accent: #8C5A1E;
  --color-accent-strong: #B5762A;
  --color-border: #EAEAEA;

  --font-heading: 'Space Grotesk', sans-serif;
  --font-body: 'Public Sans', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --nav-height: 72px;
  --section-padding-x: clamp(24px, 6vw, 96px);
  --section-padding-y: clamp(56px, 9vh, 100px);

  --transition-fast: 0.2s ease;
  --transition-medium: 0.4s cubic-bezier(0.4, 0, 0.2, 1);

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-pill: 999px;

  --shadow-sm: 0 4px 12px rgba(22, 50, 74, 0.08);
  --shadow-md: 0 8px 20px rgba(22, 50, 74, 0.1);

  --label-size: 0.75rem;
  --label-tracking: 0.08em;
  --content-max-width: 1120px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: auto; /* JS drives smooth scroll via scrollIntoView() so anchor clicks aren't double-smoothed */
}

body {
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
  line-height: 1.55;
  overflow-x: hidden;
}

main {
  padding-top: var(--nav-height);
  display: block;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.15;
}

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

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

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

/* Skip link */
.skip-link {
  position: absolute;
  left: 12px;
  top: -48px;
  background: var(--color-ink);
  color: #fff;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  z-index: 100;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 12px;
}

/* Shared mono "eyebrow" label text */
.label-mono {
  font-family: var(--font-mono);
  font-size: var(--label-size);
  text-transform: uppercase;
  letter-spacing: var(--label-tracking);
  color: var(--color-accent);
}

/* ---- Nav ---- */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  z-index: 50;
}

.site-nav__wrap {
  max-width: var(--content-max-width);
  height: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(20px, 4vw, 48px);
}

.site-nav__brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.site-nav__mark {
  display: block;
  flex-shrink: 0;
}

.site-nav__name {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-ink);
}

.site-nav__list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 28px;
}

.site-nav__link {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--color-ink);
  opacity: 0.75;
  transition: opacity var(--transition-fast);
}

.site-nav__link.active,
.site-nav__link:hover,
.site-nav__link:focus-visible {
  opacity: 1;
}

.hamburger {
  display: none;
  z-index: 60;
  width: 32px;
  height: 32px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-ink);
}

@media (max-width: 780px) {
  .site-nav__list {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: 8px clamp(20px, 4vw, 48px) 24px;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
  }

  .site-nav__list.is-open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  .site-nav__list li {
    width: 100%;
    padding: 12px 0;
    border-top: 1px solid var(--color-border);
  }

  .site-nav__list li:first-child {
    border-top: none;
  }

  .hamburger {
    display: flex;
  }
}

/* ---- Buttons ---- */
.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.9rem;
  padding: 13px 24px;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast), transform var(--transition-fast), border-color var(--transition-fast);
}

.btn--primary {
  background: var(--color-ink);
  color: #fff;
}

.btn--primary:hover,
.btn--primary:focus-visible {
  transform: translateY(-2px);
}

.btn--outline {
  border: 1.5px solid var(--color-ink);
  color: var(--color-ink);
}

.btn--outline:hover,
.btn--outline:focus-visible {
  background: var(--color-surface);
}

/* ---- Footer ---- */
.site-footer {
  background: var(--color-ink);
  color: #fff;
}

.site-footer__wrap {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 28px clamp(20px, 4vw, 48px);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.site-footer__name {
  font-family: var(--font-mono);
  font-size: var(--label-size);
  letter-spacing: var(--label-tracking);
  text-transform: uppercase;
  opacity: 0.85;
}

.site-footer__email {
  font-size: 0.9rem;
}

.site-footer__email:hover,
.site-footer__email:focus-visible {
  text-decoration: underline;
}

/* ---- Hero ---- */
.hero {
  padding: 60px var(--section-padding-x) 48px;
  max-width: var(--content-max-width);
  margin: 0 auto;
}

.hero__eyebrow {
  color: var(--color-accent);
  margin-bottom: 14px;
}

.hero__title {
  font-size: clamp(2.1rem, 5vw, 2.8rem);
  margin-bottom: 20px;
}

.lede {
  font-size: 1.05rem;
  color: var(--color-ink-dim);
  max-width: 640px;
  margin-bottom: 12px;
}

.hero__ctas {
  display: flex;
  gap: 12px;
  margin-top: 16px;
  flex-wrap: wrap;
}

/* ---- 01 The Work (homepage) ---- */
.work-intro {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 0 var(--section-padding-x) 56px;
}

.work-intro > .label-mono {
  margin-bottom: 14px;
}

/* ---- Proof strip ---- */
.proof {
  margin-top: 28px;
}

.proof__pair {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 22px 26px;
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}

.proof__col {
  flex: 1;
  min-width: 220px;
}

.proof__label {
  color: var(--color-muted);
  margin-bottom: 8px;
}

.proof__text {
  font-size: 0.9rem;
}

.proof__text--before {
  color: var(--color-muted);
  font-style: italic;
}

.proof__text--after {
  color: var(--color-ink);
  font-weight: 500;
}

.proof__arrow {
  align-self: center;
  color: var(--color-accent);
  font-size: 1.3rem;
}

/* ---- Work list (homepage + work index share this) ---- */
.work-list {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 0 var(--section-padding-x) 8px;
}

.work-list__intro {
  font-size: 0.95rem;
  color: var(--color-muted);
  margin: 6px 0 28px;
  max-width: 520px;
}

.work-list__item {
  border-top: 1px solid var(--color-border);
  padding: 26px 0;
}

.work-list__item--last {
  border-bottom: 1px solid var(--color-border);
}

.work-list__eyebrow {
  margin-bottom: 6px;
}

.work-list__title {
  font-size: 1.2rem;
  margin-bottom: 4px;
}

.work-list__meta {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: var(--label-tracking);
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: 12px;
}

.work-list__desc {
  font-size: 0.95rem;
  color: var(--color-ink-dim);
  max-width: 640px;
  line-height: 1.6;
}

.work-list__result {
  font-size: 0.9rem;
  margin-top: 10px;
}

.work-list__link {
  display: inline-block;
  color: var(--color-ink);
  margin-top: 12px;
}

.work-list__link:hover,
.work-list__link:focus-visible {
  color: var(--color-accent);
}

/* ---- 03 The Approach (homepage) ---- */
.approach {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 48px var(--section-padding-x) 8px;
}

.approach > .label-mono {
  margin-bottom: 24px;
}

.approach__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.approach__step-title {
  font-size: 1.15rem;
  margin-bottom: 8px;
}

.approach__step-desc {
  font-size: 0.9rem;
  color: var(--color-ink-dim);
  line-height: 1.6;
}

@media (max-width: 780px) {
  .approach__grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}

/* ---- Closing CTA band (homepage + about) ---- */
.cta-band {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 56px var(--section-padding-x) 64px;
  text-align: center;
}

.cta-band__title {
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  max-width: 640px;
  margin: 0 auto 24px;
}

.cta-band__links {
  display: flex;
  gap: 20px;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
}

.cta-band__link {
  color: var(--color-ink);
}

.cta-band__link:hover,
.cta-band__link:focus-visible {
  color: var(--color-accent);
}

@media (max-width: 780px) {
  .proof__pair {
    flex-direction: column;
  }

  .proof__arrow {
    transform: rotate(90deg);
  }
}

/* ---- Work index page (standalone page, not homepage teaser) ---- */
.work-list--page {
  padding-top: var(--section-padding-y);
}

.work-list__page-title {
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  margin-bottom: 8px;
}

/* ---- Case study template (shared by all case study pages) ---- */
.cs {
  padding: var(--section-padding-y) var(--section-padding-x);
  max-width: 800px;
  margin: 0 auto;
}

.cs__back {
  display: inline-block;
  color: var(--color-ink);
  margin-bottom: 24px;
}

.cs__back:hover,
.cs__back:focus-visible {
  color: var(--color-accent);
}

.cs__eyebrow {
  margin-bottom: 10px;
}

.cs__title {
  font-size: clamp(1.7rem, 4vw, 2.3rem);
  margin-bottom: 16px;
}

.cs__meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: var(--label-tracking);
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: 32px;
}

.cs-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 14px;
  margin-bottom: 48px;
}

.cs-stat {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 18px 16px;
}

.cs-stat__value {
  display: block;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.7rem;
  color: var(--color-accent-strong);
  margin-bottom: 6px;
}

.cs-stat__label {
  color: var(--color-muted);
  font-size: 0.65rem;
}

.cs-section {
  margin-bottom: 36px;
}

.cs-section__label {
  margin-bottom: 10px;
}

.cs-section__body {
  font-size: 1rem;
  color: var(--color-ink-dim);
  line-height: 1.65;
}

.cs-outcome-list {
  list-style: none;
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.cs-outcome-list li {
  font-size: 0.9rem;
  color: var(--color-ink-dim);
  padding-left: 18px;
  position: relative;
}

.cs-outcome-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent-strong);
}

.cs-next {
  border-top: 1px solid var(--color-border);
  padding-top: 24px;
  margin-top: 8px;
  margin-bottom: 32px;
}

.cs-next__link {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.3rem;
  display: inline-block;
  margin-top: 6px;
  color: var(--color-ink);
}

.cs-next__link:hover,
.cs-next__link:focus-visible {
  color: var(--color-accent);
}

.cs-cta {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 28px;
  text-align: center;
}

.cs-cta p {
  font-size: 1.05rem;
  margin-bottom: 16px;
}

.cs-cta__links {
  display: flex;
  gap: 20px;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
}

.cs-cta__all {
  color: var(--color-ink);
}

.cs-cta__all:hover,
.cs-cta__all:focus-visible {
  color: var(--color-accent);
}

@media (max-width: 700px) {
  .cs-stats {
    grid-template-columns: 1fr;
  }
}

/* ---- About page ---- */
.about-header {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: var(--section-padding-y) var(--section-padding-x) 40px;
}

.about-header__photo {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 24px;
}

.about-header > .label-mono {
  margin-bottom: 14px;
}

.about-header__title {
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  max-width: 720px;
  margin-bottom: 20px;
}

.about-header__intro {
  font-size: 1.05rem;
  color: var(--color-ink-dim);
  max-width: 680px;
  line-height: 1.65;
}

.about-block {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 40px var(--section-padding-x);
  border-top: 1px solid var(--color-border);
}

.about-block > .label-mono {
  margin-bottom: 20px;
}

.pull-quote {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 500;
  color: var(--color-ink);
  max-width: 600px;
  margin: 24px 0 0;
  padding-left: 20px;
  border-left: 3px solid var(--color-accent-strong);
}

.experience-item {
  padding: 24px 0;
  border-top: 1px solid var(--color-border);
}

.experience-item:first-of-type {
  border-top: none;
  padding-top: 0;
}

.experience-item--last {
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 24px;
}

.experience-item__dates {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: var(--label-tracking);
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: 6px;
}

.experience-item__role {
  font-size: 1.1rem;
  margin-bottom: 4px;
}

.experience-item__org {
  margin-bottom: 10px;
}

.experience-item__desc {
  font-size: 0.95rem;
  color: var(--color-ink-dim);
  max-width: 680px;
  line-height: 1.6;
}

.tag-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag-list__item {
  background: var(--color-surface);
  border-radius: var(--radius-pill);
  padding: 8px 16px;
  font-size: 0.85rem;
  color: var(--color-ink);
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.tools-grid__label {
  margin-bottom: 8px;
}

.tools-grid__value {
  font-size: 0.9rem;
  color: var(--color-ink-dim);
  line-height: 1.5;
}

@media (max-width: 780px) {
  .tools-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 500px) {
  .tools-grid {
    grid-template-columns: 1fr;
  }
}