/* ==========================================================================
   Fonts
   ========================================================================== */

@font-face {
  font-family: "Source Serif 4";
  src: url("/fonts/SourceSerif4-Regular.otf.woff2") format("woff2");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Inter";
  src: url("/fonts/Inter-Regular.woff2") format("woff2");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Inter";
  src: url("/fonts/Inter-SemiBold.woff2") format("woff2");
  font-style: normal;
  font-weight: 600;
  font-display: swap;
}

/* ==========================================================================
   Custom properties
   ========================================================================== */

:root {
  --colour-background: #f5f2ea;
  --colour-text: #151515;
  --colour-muted: #565656;
  --colour-rule: #b8b5ad;

  --font-heading: "Source Serif 4", Georgia, "Times New Roman", serif;
  --font-body: "Inter", Arial, sans-serif;

  --page-width: 80rem;
  --page-gutter: clamp(1.25rem, 4vw, 3rem);
}

/* ==========================================================================
   Base
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--colour-background);
  color: var(--colour-text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.5;
  overflow-wrap: break-word;
}

h1,
h2,
h3,
p {
  margin-block-start: 0;
}

h1,
h2 {
  font-family: var(--font-heading);
  font-weight: 400;
  line-height: 0.98;
}

a {
  color: inherit;
}

/* ==========================================================================
   Accessibility
   ========================================================================== */

a:focus-visible {
  outline: 0.1875rem solid currentColor;
  outline-offset: 0.25rem;
}

.button:focus-visible {
  outline: 0.1875rem solid var(--colour-text);
  outline-offset: 0.25rem;
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.skip-link {
  display: block;
  height: 0;
  overflow: hidden;
  background: var(--colour-text);
  color: var(--colour-background);
  font-weight: 600;
  text-align: center;
}

.skip-link:focus {
  height: auto;
  padding: 0.75rem 1rem;
}

/* ==========================================================================
   Layout
   ========================================================================== */

.container {
  width: min(calc(100% - (var(--page-gutter) * 2)), var(--page-width));
  margin-inline: auto;
}

.section-label {
  margin-bottom: 1.25rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* ==========================================================================
   Header and navigation
   ========================================================================== */

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  min-height: 5rem;
  border-bottom: 1px solid var(--colour-rule);
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  color: var(--colour-text);
  text-decoration: none;
}

.site-brand__mark {
  display: block;
  width: 2.5rem;
  height: 2.5rem;
  flex: 0 0 auto;
}

.site-brand__name {
  font-family: var(--font-heading);
  font-size: 1.625rem;
  font-weight: 400;
  line-height: 1;
}

.primary-nav ul {
  display: flex;
  align-items: center;
  gap: clamp(1.25rem, 3vw, 2.5rem);
  margin: 0;
  padding: 0;
  list-style: none;
}

.primary-nav a {
  font-size: 0.875rem;
  text-decoration: none;
}

.primary-nav a:hover {
  text-decoration: underline;
  text-underline-offset: 0.25em;
}

/* ==========================================================================
   Hero
   ========================================================================== */

main > section:first-child {
  padding-block: clamp(2.5rem, 4vw, 4rem) 2rem;
}

main > section:first-child > .section-label {
  margin-bottom: 1rem;
}

h1 {
  max-width: 14ch;
  margin-bottom: 1.25rem;
  font-size: clamp(3rem, 6vw, 5.75rem);
  letter-spacing: -0.035em;
}

.hero__intro {
  max-width: 48rem;
  margin-bottom: 1rem;
  color: var(--colour-muted);
  font-size: clamp(1.125rem, 2vw, 1.375rem);
  line-height: 1.4;
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: 2rem;
  margin-bottom: clamp(2.5rem, 4vw, 3.5rem);
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.875rem 1.125rem;
  background: var(--colour-text);
  color: var(--colour-background);
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
}

.button:hover {
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.text-link {
  font-size: 0.875rem;
  text-underline-offset: 0.25em;
}

/* ==========================================================================
   Experience summary
   ========================================================================== */

.experience-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--colour-rule);
  border-bottom: 1px solid var(--colour-rule);
}

.experience-grid__item {
  padding: 1.5rem 1.5rem 1.75rem 0;
}

.experience-grid__item + .experience-grid__item {
  padding-left: 1.5rem;
  border-left: 1px solid var(--colour-rule);
}

.experience-grid h2 {
  margin-bottom: 0.75rem;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.3;
}

.experience-grid p {
  margin-bottom: 0;
  color: var(--colour-muted);
  font-size: 0.875rem;
  line-height: 1.55;
}

/* ==========================================================================
   Technical experience
   ========================================================================== */

.technical-section {
  padding-top: clamp(2.5rem, 4vw, 3.5rem);
  padding-bottom: 0;
}

.technical-section > h2 {
  max-width: 12ch;
  margin-bottom: 1.5rem;
  font-size: clamp(2.75rem, 5vw, 4.75rem);
  letter-spacing: -0.03em;
}

.technical-section__intro {
  max-width: 46rem;
  margin-bottom: clamp(3rem, 6vw, 5rem);
  color: var(--colour-muted);
  font-size: clamp(1.0625rem, 1.5vw, 1.25rem);
  line-height: 1.55;
}

.technical-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--colour-rule);
  border-bottom: 1px solid var(--colour-rule);
}

.technical-grid > section {
  padding: 1.5rem 1.5rem 1.75rem 0;
}

.technical-grid > section + section {
  padding-left: 1.5rem;
  border-left: 1px solid var(--colour-rule);
}

.technical-grid h3 {
  margin-bottom: 1rem;
  font-size: 0.9375rem;
  font-weight: 600;
}

.technical-grid p {
  margin-bottom: 0;
  color: var(--colour-muted);
  font-size: 0.875rem;
  line-height: 1.8;
}

/* ==========================================================================
   Experience
   ========================================================================== */

.experience-section {
  padding-block: 2.5rem;
  border-bottom: 1px solid var(--colour-rule);
}

.experience-section .section-label {
  margin-bottom: 0.75rem;
}

.experience-section__content {
  display: grid;
  grid-template-columns: minmax(20rem, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(3rem, 7vw, 7rem);
  align-items: start;
}

.experience-section h2 {
  max-width: none;
  margin: 0;
  font-size: clamp(2rem, 3vw, 2.75rem);
  line-height: 1;
  letter-spacing: -0.025em;
}

.experience-section__content > p {
  max-width: 40rem;
  margin: 0;
  padding-top: 0.25rem;
  color: var(--colour-muted);
  line-height: 1.6;
}

/* ==========================================================================
   About and contact
   ========================================================================== */

.closing-sections {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  border-bottom: 1px solid var(--colour-rule);
}

.closing-sections > section {
  padding-block: clamp(2.5rem, 5vw, 4rem);
}

.closing-sections > section:first-child {
  padding-right: clamp(2rem, 5vw, 5rem);
}

.closing-sections > section + section {
  padding-left: clamp(2rem, 5vw, 5rem);
  border-left: 1px solid var(--colour-rule);
}

.closing-sections h2 {
  margin-bottom: 1rem;
  font-size: clamp(2rem, 3vw, 3rem);
  letter-spacing: -0.025em;
}

.closing-sections section > p:not(.section-label) {
  max-width: 42rem;
  color: var(--colour-muted);
  line-height: 1.6;
}

.about__person {
  margin-top: 1.5rem;
}

.about__person p {
  margin-block: 0 1rem;
}

.about__person strong {
  color: var(--colour-text);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  padding-block: 1.5rem;
}

.site-footer p {
  margin: 0;
  color: var(--colour-muted);
  font-size: 0.75rem;
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 60rem) {
  .experience-grid,
  .technical-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .experience-grid__item:nth-child(3),
  .technical-grid > section:nth-child(3) {
    border-left: 0;
  }

  .experience-grid__item:nth-child(n + 3),
  .technical-grid > section:nth-child(n + 3) {
    border-top: 1px solid var(--colour-rule);
  }
}

@media (max-width: 42rem) {
  .site-header__inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 1rem;
    padding-block: 1.25rem;
  }

  .primary-nav {
    width: 100%;
  }

  .primary-nav ul {
    justify-content: space-between;
    gap: 0.75rem;
  }

  main > section:first-child {
    padding-top: 2rem;
  }

  h1 {
    max-width: none;
    font-size: clamp(2.5rem, 11vw, 3.5rem);
    line-height: 1.02;
    letter-spacing: -0.025em;
  }

  .hero__actions {
    align-items: flex-start;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
  }

  .experience-grid,
  .technical-grid {
    grid-template-columns: 1fr;
  }

  .experience-grid__item,
  .experience-grid__item + .experience-grid__item,
  .technical-grid > section,
  .technical-grid > section + section {
    padding: 1rem 0;
    border-left: 0;
  }

  .experience-grid__item + .experience-grid__item,
  .technical-grid > section + section {
    border-top: 1px solid var(--colour-rule);
  }

  .technical-section {
    padding-top: 2.5rem;
  }

  .technical-section__intro {
    margin-bottom: 2.5rem;
  }

  .experience-section {
    padding-block: 2rem;
  }

  .experience-section__content {
    grid-template-columns: minmax(0, 1fr);
    gap: 1.25rem;
  }

  .experience-section h2 {
    max-width: none;
  }

  .closing-sections {
    grid-template-columns: 1fr;
  }

  .closing-sections > section {
    padding-block: 2rem;
  }

  .closing-sections > section:first-child,
  .closing-sections > section + section {
    padding-inline: 0;
  }

  .closing-sections > section + section {
    border-top: 1px solid var(--colour-rule);
    border-left: 0;
  }

  .closing-sections h2 {
    margin-bottom: 0.75rem;
  }

  .about__person {
    margin-top: 1.5rem;
  }
}