:root {
  --site-ink: #1b1b1b;
  --site-muted: #565c65;
  --site-border: #dfe1e2;
  --site-background-soft: #f7f9fa;

  --site-link: #005ea8;
  --site-link-hover: #1a4480;

  --site-focus: #face00;

  --site-measure: 46rem;
  --site-case-study-width: 52rem;
}


/* =========================================================
   BASE
   ========================================================= */

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--site-ink);
  background: #ffffff;

  font-size: 1.125rem;
  line-height: 1.65;
}

main:focus {
  outline: none;
}

a {
  text-underline-offset: 0.16em;
}

a:hover {
  text-decoration-thickness: 0.14em;
}

a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
  outline: 0.25rem solid var(--site-focus);
  outline-offset: 0.2rem;
}


/* =========================================================
   REDUCED MOTION
   ========================================================= */

@media (prefers-reduced-motion: reduce) {

  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

}


/* =========================================================
   SITE HEADER
   ========================================================= */

.site-header {
  border-bottom: 1px solid var(--site-border);
  background: #ffffff;
}

.site-header__inner {
  min-height: 6rem;

  display: flex;
  align-items: center;

  gap: 2rem;
}

.site-brand {
  flex: 1;

  display: flex;
  flex-direction: column;

  padding-top: 1rem;
  padding-bottom: 1rem;
}

.site-brand__name {
  color: var(--site-ink);

  font-size: 1.45rem;
  font-weight: 700;
  line-height: 1.2;

  text-decoration: none;
}

.site-brand__name:hover {
  color: var(--site-link);
}

.site-brand__role {
  margin-top: 0.2rem;

  color: var(--site-muted);

  font-size: 0.95rem;
  line-height: 1.4;
}

.usa-nav {
  background: #ffffff;
}

.usa-nav__primary > .usa-nav__primary-item > a {
  font-weight: 600;
}

.usa-nav-link[aria-current="page"] {
  text-decoration: underline;
  text-decoration-thickness: 0.2rem;
  text-underline-offset: 0.45rem;
}


/* =========================================================
   GENERAL TYPOGRAPHY
   ========================================================= */

h1,
h2,
h3 {
  color: var(--site-ink);
}

p,
li,
dd {
  max-width: 72ch;
}

.eyebrow {
  margin: 0;

  color: var(--site-muted);

  font-size: 0.9rem;
  font-weight: 700;

  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.measure {
  max-width: var(--site-measure);
}


/* =========================================================
   GENERAL HOME / PORTFOLIO SECTIONS
   ========================================================= */

.hero {
  padding-top: 5rem;
  padding-bottom: 5.5rem;

  border-bottom: 1px solid var(--site-border);
}

.hero h1,
.page-intro h1 {
  max-width: 16ch;

  margin-top: 0.35rem;
  margin-bottom: 1.5rem;

  font-size: clamp(2.55rem, 6vw, 4.9rem);
  line-height: 1.02;

  letter-spacing: -0.035em;
}

.hero__lede,
.page-intro__lede {
  max-width: 48rem;

  color: #3d4551;

  font-size: clamp(1.25rem, 2vw, 1.6rem);
  line-height: 1.5;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;

  gap: 0.75rem;

  margin-top: 2rem;
}

.page-intro {
  padding-top: 4.5rem;
  padding-bottom: 3.5rem;

  border-bottom: 1px solid var(--site-border);
}

.section {
  padding-top: 4rem;
  padding-bottom: 4rem;
}


/* =========================================================
   RESUME
   ========================================================= */

.resume-grid {
  display: grid;

  grid-template-columns:
    minmax(0, 2.2fr)
    minmax(15rem, 0.8fr);

  gap: 4rem;

  margin-top: 3rem;
}

.resume-entry {
  padding-bottom: 2.5rem;
  margin-bottom: 2.5rem;

  border-bottom: 1px solid var(--site-border);
}

.resume-entry h3 {
  margin-bottom: 0.2rem;
}

.resume-entry__heading {
  display: flex;

  justify-content: space-between;
  align-items: start;

  gap: 2rem;
}

.resume-entry__org,
.resume-entry__date {
  margin-top: 0;

  color: var(--site-muted);
}

.resume-entry__date {
  white-space: nowrap;
}

.resume-sidebar {
  padding-left: 2rem;

  border-left: 1px solid var(--site-border);
}

.resume-sidebar h2:not(:first-child) {
  margin-top: 3rem;
}

.plain-list {
  padding: 0;
  margin: 0;

  list-style: none;
}

.plain-list li {
  padding-top: 0.42rem;
  padding-bottom: 0.42rem;

  border-bottom: 1px solid var(--site-border);
}


/* =========================================================
   PORTFOLIO INDEX
   ========================================================= */

.portfolio-grid {
  display: grid;

  grid-template-columns:
    repeat(2, minmax(0, 1fr));

  gap: 1.5rem;
}

.project-card {
  padding: 2rem;

  border: 1px solid var(--site-border);

  background: #ffffff;
}

.project-card h2 {
  margin-top: 0.35rem;

  font-size: 1.7rem;
}

.project-card__type {
  color: var(--site-muted);

  font-size: 0.9rem;
  font-weight: 700;

  letter-spacing: 0.04em;
  text-transform: uppercase;
}


/* =========================================================
   LOGS
   ========================================================= */

.log-list {
  max-width: 54rem;
}

.log-entry {
  padding-bottom: 2rem;
  margin-bottom: 2.5rem;

  border-bottom: 1px solid var(--site-border);
}

.log-entry h2 {
  margin-top: 0.25rem;
  margin-bottom: 0.5rem;
}

.log-entry h2 a {
  color: var(--site-ink);
}

.log-entry__date {
  color: var(--site-muted);

  font-size: 0.9rem;
  font-weight: 700;

  letter-spacing: 0.04em;
  text-transform: uppercase;
}


/* =========================================================
   CONTACT
   ========================================================= */

.contact-list {
  padding-left: 1.4rem;

  font-size: 1.25rem;
}

.contact-list li {
  margin-top: 0.75rem;
  margin-bottom: 0.75rem;
}


/* =========================================================
   BREADCRUMB
   ========================================================= */

.breadcrumb {
  max-width: var(--site-case-study-width);

  margin-right: auto;
  margin-left: auto;

  padding-top: 1.5rem;
  padding-right: 1rem;
  padding-left: 1rem;
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;

  gap: 0.45rem;

  padding: 0;
  margin: 0;

  color: var(--site-muted);

  font-size: 0.95rem;

  list-style: none;
}

.breadcrumb__list li {
  max-width: none;
}

.breadcrumb__list li:not(:last-child)::after {
  margin-left: 0.45rem;

  color: var(--site-muted);

  content: "/";
}

.breadcrumb__list a {
  color: var(--site-link);
}


/* =========================================================
   CASE STUDY
   ========================================================= */

.case-study {
  max-width: var(--site-case-study-width);

  margin-right: auto;
  margin-left: auto;

  padding-top: 3rem;
  padding-right: 1rem;
  padding-bottom: 4rem;
  padding-left: 1rem;
}

.case-study__header {
  padding-bottom: 3rem;
  margin-bottom: 3.5rem;

  border-bottom: 1px solid var(--site-border);
}

.case-study__header h1 {
  max-width: 16ch;

  margin-top: 0.5rem;
  margin-bottom: 1.5rem;

  font-size: clamp(2.5rem, 6vw, 4.5rem);
  line-height: 1.05;

  letter-spacing: -0.03em;
}

.case-study__summary {
  max-width: 44rem;

  color: #3d4551;

  font-size: 1.4rem;
  line-height: 1.55;
}

.case-study > section {
  margin-top: 4rem;
}

.case-study > section > h2 {
  margin-bottom: 1.25rem;

  font-size: clamp(1.8rem, 3vw, 2.2rem);
  line-height: 1.2;
}

.case-study h3 {
  line-height: 1.3;
}

.case-study p {
  margin-top: 1rem;
  margin-bottom: 1rem;
}

.case-study li {
  margin-bottom: 0.5rem;
}


/* =========================================================
   CASE STUDY FACTS
   ========================================================= */

.case-study__facts {
  display: grid;

  grid-template-columns:
    repeat(2, minmax(0, 1fr));

  gap: 1.5rem 3rem;

  margin-top: 2.5rem;
  margin-bottom: 0;
}

.case-study__facts div {
  padding-top: 0.75rem;

  border-top: 1px solid var(--site-border);
}

.case-study__facts dt {
  margin-bottom: 0.25rem;

  color: var(--site-muted);

  font-size: 0.9rem;
  font-weight: 700;

  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.case-study__facts dd {
  margin: 0;
}


/* =========================================================
   RESULT STRIP
   ========================================================= */

.result-strip {
  margin-top: 3rem;
  margin-bottom: 0;
}

.result-strip__list {
  padding: 0;
  margin: 0;
}

.result-strip__item {
  box-sizing: border-box;

  width: 100%;

  padding-top: 1rem;
  padding-bottom: 1.25rem;

  border-top: 0.25rem solid var(--site-link);
}

.result-strip__value {
  display: block;

  margin: 0;

  color: var(--site-ink);

  font-size: 2rem;
  font-weight: 700;
  line-height: 1.1;
}

.result-strip__label {
  margin-top: 0.35rem;
  margin-right: 0;
  margin-bottom: 0;
  margin-left: 0;

  color: #3d4551;

  line-height: 1.4;
}


/* Modifier for a three-metric strip */

.result-strip--three .result-strip__item {
  width: 100%;
}


/* =========================================================
   CASE STUDY PROCESS
   ========================================================= */

.case-study__steps {
  padding-left: 1.6rem;
}

.case-study__steps > li {
  padding-left: 0.5rem;
  margin-bottom: 2.5rem;
}

.case-study__steps h3 {
  margin-bottom: 0.4rem;
}

.case-study__lifecycle {
  padding: 1rem 1.25rem;

  border-left: 0.3rem solid var(--site-link);

  background: var(--site-background-soft);
}


/* =========================================================
   CASE STUDY LINKS
   ========================================================= */

.case-study__links {
  padding-left: 1.25rem;
}

.case-study__links li {
  margin-bottom: 0.75rem;
}


/* =========================================================
   PREVIOUS / NEXT CASE STUDY NAVIGATION
   ========================================================= */

.case-study-nav {
  max-width: var(--site-case-study-width);

  margin-top: 1rem;
  margin-right: auto;
  margin-bottom: 5rem;
  margin-left: auto;

  padding-top: 2.5rem;
  padding-right: 1rem;
  padding-left: 1rem;

  border-top: 1px solid var(--site-border);
}

.case-study-nav__link {
  display: block;

  box-sizing: border-box;

  height: 100%;

  padding: 1.25rem;

  border: 1px solid var(--site-border);

  color: var(--site-link);

  text-decoration: none;
}

.case-study-nav__link:hover {
  border-color: var(--site-link);

  color: var(--site-link-hover);

  text-decoration: none;
}

.case-study-nav__link:focus-visible {
  outline: 0.25rem solid var(--site-focus);
  outline-offset: 0.25rem;
}

.case-study-nav__direction {
  display: block;

  margin-bottom: 0.35rem;

  color: var(--site-muted);

  font-size: 0.9rem;
  font-weight: 700;

  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.case-study-nav__title {
  display: block;

  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.35;

  text-decoration: underline;
  text-underline-offset: 0.15em;
}

.case-study-nav__link--next {
  text-align: right;
}


/* =========================================================
   FOOTER
   ========================================================= */

.site-footer {
  margin-top: 3rem;

  border-top: 1px solid var(--site-border);

  background: var(--site-background-soft);
}

.site-footer__inner {
  display: flex;

  justify-content: space-between;

  gap: 2rem;

  padding-top: 2rem;
  padding-bottom: 2rem;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  align-items: start;

  gap: 1.25rem;
}


/* =========================================================
   TABLET
   ========================================================= */

@media (min-width: 40em) {

  .result-strip {
    margin-top: 3.25rem;
  }

  .result-strip__item {
    padding-top: 1.25rem;
    padding-bottom: 1.5rem;
  }

  .result-strip__value {
    font-size: 2.5rem;
  }

  .result-strip--three .result-strip__item {
    width: 33.3333%;
  }

}


/* =========================================================
   DESKTOP
   ========================================================= */

@media (min-width: 64em) {

  .result-strip__value {
    font-size: 3rem;
  }

  .result-strip__label {
    max-width: 16rem;
  }

}


/* =========================================================
   SMALL DESKTOP / TABLET NAV
   ========================================================= */

@media (max-width: 63.99em) {

  .site-header__inner {
    min-height: 5rem;
  }

  .resume-grid {
    grid-template-columns: 1fr;

    gap: 2rem;
  }

  .resume-sidebar {
    padding-top: 2rem;
    padding-left: 0;

    border-top: 1px solid var(--site-border);
    border-left: 0;
  }

}


/* =========================================================
   MOBILE
   ========================================================= */

@media (max-width: 39.99em) {

  body {
    font-size: 1.05rem;
  }

  .hero {
    padding-top: 3.5rem;
    padding-bottom: 3.5rem;
  }

  .page-intro {
    padding-top: 3rem;
    padding-bottom: 2.5rem;
  }

  .section {
    padding-top: 3rem;
    padding-bottom: 3rem;
  }

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

  .resume-entry__heading {
    display: block;
  }

  .case-study {
    padding-top: 2.5rem;
  }

  .case-study__header {
    padding-bottom: 2.5rem;
    margin-bottom: 3rem;
  }

  .case-study__summary {
    font-size: 1.25rem;
  }

  .case-study__facts {
    grid-template-columns: 1fr;

    gap: 1.25rem;
  }

  .case-study > section {
    margin-top: 3rem;
  }

  .case-study-nav {
    margin-top: 0;
    margin-bottom: 3.5rem;
  }

  .case-study-nav__link--next {
    text-align: left;
  }

  .site-footer__inner {
    display: block;
  }

  .site-footer nav {
    margin-top: 1.5rem;
  }

}


/* =========================================================
   WINDOWS HIGH CONTRAST / FORCED COLORS
   ========================================================= */

@media (forced-colors: active) {

  a:focus-visible,
  button:focus-visible,
  [tabindex]:focus-visible,
  .case-study-nav__link:focus-visible {
    outline: 3px solid Highlight;
  }

  .result-strip__item {
    border-top-color: CanvasText;
  }

  .case-study-nav__link {
    border-color: CanvasText;
  }

  .case-study__lifecycle {
    border-left-color: CanvasText;
  }

}