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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-base);
  font-size: var(--text-base);
  line-height: 1.7;
  letter-spacing: var(--tracking-base);
  color: var(--color-text);
  background: var(--color-background);
}

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

a {
  color: var(--color-link);
  transition: color 0.2s;
}

a:hover {
  color: var(--color-link-hover);
}

h1,
h2,
h3 {
  margin: 0 0 var(--space-3);
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: var(--tracking-heading);
  color: var(--color-heading);
}

h1 {
  font-size: var(--text-h2);
}

h2 {
  font-size: var(--text-h2);
}

h3 {
  font-size: var(--text-h3);
}

p {
  margin: 0 0 var(--space-3);
}

.icon {
  width: 1em;
  height: 1em;
  fill: currentColor;
  flex-shrink: 0;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: var(--space-2);
  top: -4rem;
  z-index: 100;
  padding: var(--space-1) var(--space-2);
  background: var(--color-black);
  color: var(--color-on-dark);
}

.skip-link:focus {
  top: var(--space-2);
}

.container {
  width: 100%;
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-background);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-height);
}

.site-header__logo img {
  width: 7.5rem;
}

.site-header__toggle {
  display: inline-flex;
  padding: var(--space-1);
  border: 0;
  background: none;
  color: var(--color-heading);
  font-size: 1.75rem;
  cursor: pointer;
}

.site-header__toggle .icon--close,
.site-header.is-open .site-header__toggle .icon--open {
  display: none;
}

.site-header.is-open .site-header__toggle .icon--close {
  display: block;
}

.site-nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-background);
  border-bottom: 1px solid var(--color-border);
}

.site-header.is-open .site-nav {
  display: block;
}

.site-nav__list {
  margin: 0;
  padding: var(--space-4) var(--space-3);
  list-style: none;
  text-align: center;
}

.site-nav__link {
  display: block;
  padding: var(--space-2) 0;
  font-size: 1.375rem;
  font-weight: 500;
  text-decoration: none;
  color: var(--color-nav);
}

.site-nav__link:hover,
.site-nav__link[aria-current="page"] {
  color: var(--color-heading);
}

@media (min-width: 60em) {
  .site-header__inner {
    min-height: 6.5rem;
  }

  .site-header__logo img {
    width: 9rem;
  }

  .site-header__toggle {
    display: none;
  }

  .site-nav {
    display: block;
    position: static;
    background: none;
    border-bottom: 0;
  }

  .site-nav__list {
    display: flex;
    gap: var(--space-4);
    padding: 0;
  }

  .site-nav__link {
    position: relative;
    padding: var(--space-1) 0;
    font-size: 1.1875rem;
    color: var(--color-nav);
  }

  .site-nav__link:hover,
  .site-nav__link[aria-current="page"] {
    color: var(--color-nav-active);
  }

  .site-nav__link[aria-current="page"]::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 1.2rem;
    border-bottom: 2px solid var(--color-heading);
  }
}

/* Slider */

.slider {
  position: relative;
  height: 85vh;
  min-height: 30rem;
  max-height: 60rem;
  overflow: hidden;
  background: var(--color-dark);
}

.slider__slide {
  position: absolute;
  inset: 0;
  margin: 0;
  opacity: 0;
  transition: opacity 1s ease;
}

.slider__slide.is-active {
  opacity: 1;
}

.slider__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.slider__caption {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: max-content;
  max-width: calc(100% - var(--space-4));
  padding: var(--space-2) var(--space-4);
  background: var(--color-overlay);
  color: var(--color-on-dark);
  font-size: 1.75rem;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 5px;
  text-align: center;
}

.slider__button {
  position: absolute;
  bottom: var(--space-4);
  z-index: 2;
  display: none;
  padding: var(--space-1);
  border: 0;
  background: none;
  color: var(--color-on-dark);
  font-size: 2rem;
  cursor: pointer;
  transition: opacity 0.2s;
}

.slider__button:hover {
  opacity: 0.5;
}

.slider__button--prev {
  left: var(--space-4);
}

.slider__button--next {
  left: calc(var(--space-4) + 3.5rem);
}

.slider__dots {
  position: absolute;
  left: 0;
  right: 0;
  bottom: var(--space-3);
  z-index: 2;
  display: flex;
  justify-content: center;
  gap: 0.25rem;
}

.slider__dot {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
}

.slider__dot::before {
  content: "";
  box-sizing: border-box;
  width: 0.9375rem;
  height: 0.9375rem;
  border: 2px solid var(--color-on-dark);
  border-radius: 50%;
}

.slider__dot[aria-current="true"]::before {
  background: var(--color-on-dark);
}

@media (min-width: 49em) {
  .slider__caption {
    font-size: var(--text-hero);
    font-weight: 500;
    letter-spacing: var(--tracking-hero);
  }

  .slider__button {
    display: inline-flex;
  }

  .slider__dots {
    display: none;
  }
}

/* Sections */

.section {
  padding: var(--space-5) 0;
}

.section--surface {
  background: var(--color-surface);
}

.section--intro {
  padding: var(--space-5) 0 var(--space-4);
}

.split {
  display: grid;
  gap: var(--space-4);
}

@media (min-width: 48em) {
  .section--intro {
    padding: var(--space-6) 0 var(--space-5);
  }

  .split {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-5);
  }

  .split--narrow-first {
    grid-template-columns: 1fr 2fr;
  }
}

.title-line {
  font-size: var(--text-h2);
}

.lead {
  font-size: var(--text-lead);
  line-height: 1.5;
  letter-spacing: 1.8px;
  color: var(--color-heading);
}

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

.prose h2 {
  font-size: var(--text-h3);
  margin-top: var(--space-4);
}

.prose ol,
.prose ul {
  margin: 0 0 var(--space-3);
  padding-left: var(--space-3);
}

.prose li {
  margin-bottom: var(--space-1);
}

.prose--muted {
  font-size: var(--text-lead);
  color: #676767;
}

.contact-list {
  font-style: normal;
}

.contact-list a {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}

/* Page title */

.page-title {
  padding: var(--space-5) 0;
  background: var(--color-black);
  color: var(--color-on-dark);
  text-align: center;
}

.page-title h1 {
  margin: 0;
  color: var(--color-on-dark);
}

.page-title__tag {
  margin: var(--space-2) 0 0;
  color: var(--color-on-dark-muted);
}

/* References */

.project-grid {
  display: grid;
  margin: 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 48em) {
  .project-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.project-card {
  position: relative;
  overflow: hidden;
  background: var(--color-black);
}

.project-card__image {
  width: 100%;
  aspect-ratio: 1000 / 670;
  object-fit: cover;
  transition: transform 0.6s ease, opacity 0.4s;
}

.project-card__body {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: var(--space-3);
  color: var(--color-on-dark);
  text-align: center;
  background: rgba(0, 0, 0, 0.55);
  opacity: 0;
  transition: opacity 0.4s;
}

.project-card:hover .project-card__body,
.project-card:focus-within .project-card__body {
  opacity: 1;
}

.project-card:hover .project-card__image {
  transform: scale(1.05);
}

.project-card__title {
  margin: 0 0 var(--space-1);
  font-size: 1.625rem;
  font-weight: 600;
  letter-spacing: 0;
  color: var(--color-on-dark);
}

.project-card__title a {
  color: inherit;
  text-decoration: none;
}

.project-card__title a::after {
  content: "";
  position: absolute;
  inset: 0;
}

.project-card__tag {
  margin: 0;
  font-size: 1rem;
}

@media (hover: none) {
  .project-card__body {
    top: auto;
    opacity: 1;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.75), transparent);
  }
}

.project {
  padding: var(--space-5) 0;
}

.project__image {
  width: 100%;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  margin-top: var(--space-4);
  text-decoration: none;
}

/* Footer */

.site-footer {
  padding: var(--space-5) 0;
  background: var(--color-footer);
  color: var(--color-on-dark);
  font-size: 1.0625rem;
  letter-spacing: 1.3px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.site-footer a {
  color: var(--color-on-dark);
}

.site-footer a:hover {
  color: var(--color-on-dark-muted);
}

.site-footer__grid {
  display: grid;
  gap: var(--space-4);
}

@media (min-width: 48em) {
  .site-footer__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.site-footer__title {
  margin: 0 0 var(--space-2);
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: 0;
  color: var(--color-on-dark);
}

.site-footer p {
  margin: 0 0 var(--space-2);
}

.back-to-top {
  position: fixed;
  right: var(--space-3);
  bottom: var(--space-3);
  z-index: 40;
  display: inline-flex;
  padding: 0.625rem;
  background: #dbdbdb;
  color: var(--color-heading);
  font-size: 1.25rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.back-to-top.is-visible {
  opacity: 1;
  pointer-events: auto;
}

/* Not found */

.not-found {
  padding: var(--space-6) 0;
  background: #212121;
  color: var(--color-on-dark);
  text-align: center;
}

.not-found h1 {
  color: var(--color-on-dark);
}

.not-found a {
  color: var(--color-on-dark);
}

.link-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .slider__slide,
  .project-card__image,
  .project-card__body {
    transition: none;
  }
}