/* ---------- Reset & base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: #1a1a1a;
  background-color: #ffffff;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

h1,
h2,
h3,
h4 {
  font-weight: 400;
  letter-spacing: -0.01em;
  margin: 0 0 0.5em;
  line-height: 1.2;
}

p {
  margin: 0 0 1em;
}

/* ---------- Layout helpers ---------- */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: 4rem 0;
}

/* ---------- Header / Nav ---------- */
.site-header {
  background: #ffffff;
  padding: 1rem 2rem;
  box-shadow: 0 6px 20px -6px rgba(0, 0, 0, 0.30);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header__inner {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  max-width: 1440px;
  margin: 0 auto;
}

.site-logo {
  display: inline-flex;
  align-items: center;
}

.site-logo img {
  height: 40px;
  width: auto;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 2rem;
}

.site-nav a {
  position: relative;
  font-size: 1rem;
  font-weight: 400;
  color: #1a1a1a;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -3px;
  height: 1px;
  background-color: #1a1a1a;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.3s ease;
  will-change: transform;
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after,
.site-nav a.active::after {
  transform: scaleX(1);
}

/* ---------- Footer ---------- */
.site-footer {
  padding: 3rem 1rem 2rem;
  text-align: center;
  font-size: 0.875rem;
  color: #8a8a8a;
  border-top: 1px solid #f0f0f0;
  margin-top: 4rem;
}

/* ---------- Home ---------- */
.hero {
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 4rem 2rem;
}

.hero__eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.25em;
  font-size: 0.75rem;
  color: #8a8a8a;
  margin-bottom: 1.5rem;
}

.hero__title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 300;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.hero__subtitle {
  font-size: 1.125rem;
  color: #4a4a4a;
  max-width: 40rem;
  margin: 0 auto 2.5rem;
}

.btn {
  display: inline-block;
  padding: 0.85rem 2rem;
  border: 1px solid #1a1a1a;
  border-radius: 999px;
  color: #1a1a1a;
  font-size: 0.875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.btn:hover {
  background-color: #1a1a1a;
  color: #ffffff;
}

.btn--primary {
  background-color: #1a1a1a;
  color: #ffffff;
}

.btn--primary:hover {
  background-color: #ffffff;
  color: #1a1a1a;
}

.project-cta {
  display: flex;
  justify-content: center;
  padding-top: 1rem;
}

/* ---------- Contact ---------- */
.contact {
  max-width: 640px;
  margin: 0;
  padding: 2rem;
  text-align: left;
}

.contact h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 300;
  margin-bottom: 1.5rem;
}

.contact__lead {
  color: #4a4a4a;
  margin-bottom: 3rem;
}

.contact__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact__list li {
  font-size: 1.125rem;
}

.contact__label {
  display: block;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.75rem;
  color: #8a8a8a;
  margin-bottom: 0.25rem;
}

.contact__list a {
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.contact__list a:hover {
  border-bottom-color: #1a1a1a;
}

/* ---------- Portfolio grid ---------- */
.page-title {
  text-align: center;
  padding: 4rem 2rem 2rem;
}

.page-title h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 300;
}

.page-title p {
  color: #4a4a4a;
  max-width: 42rem;
  margin: 0 auto;
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  padding: 2rem 0 4rem;
}

.portfolio-card {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background-color: #f5f5f5;
}

.portfolio-card__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.portfolio-card__overlay {
  position: absolute;
  inset: 0;
  background-color: rgba(26, 26, 26, 0);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease, background-color 0.3s ease;
}

.portfolio-card__title {
  color: #ffffff;
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 300;
  letter-spacing: 0.02em;
  text-align: center;
  padding: 0 1rem;
  transform: translateY(10px);
  transition: transform 0.3s ease;
}

.portfolio-card:hover .portfolio-card__image {
  transform: scale(1.03);
}

.portfolio-card:hover .portfolio-card__overlay {
  opacity: 1;
  background-color: rgba(26, 26, 26, 0.55);
}

.portfolio-card:hover .portfolio-card__title {
  transform: translateY(0);
}

/* ---------- Project detail ---------- */
.project-header {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding: 1.75rem 0 2.5rem;
}

.project-header h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 300;
  margin: 0;
  white-space: nowrap;
}

.project-header__description {
  color: #4a4a4a;
  font-size: 1rem;
  line-height: 1.7;
  max-width: 65ch;
}

.project-back {
  position: relative;
  display: inline-block;
  margin-bottom: 1.5rem;
  font-size: 0.875rem;
  color: #8a8a8a;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: color 0.2s ease;
}

.project-back::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -3px;
  height: 1px;
  background-color: #1a1a1a;
  transform: scaleX(0);
  transform-origin: right center;
  transition: transform 0.3s ease;
  will-change: transform;
}

.project-back:hover,
.project-back:focus-visible {
  color: #1a1a1a;
}

.project-back:hover::after,
.project-back:focus-visible::after {
  transform: scaleX(1);
}

.project-gallery {
  padding: 2rem 0 4rem;
  display: flex;
  flex-direction: column;
  gap: 3.5rem;
}

.project-gallery__group {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.project-gallery__label {
  text-align: center;
  font-size: 0.75rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: #8a8a8a;
}

.project-gallery__images {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.project-gallery__images img {
  width: 100%;
  height: auto;
  background-color: #f5f5f5;
}

.project-gallery__images--single img {
  width: 100%;
  margin: 0 auto;
}

main.container:has(.project-gallery) {
  max-width: 1600px;
}

.project-gallery--wide {
  width: 95vw;
  max-width: 1800px;
  margin-left: calc(-47.5vw + 50%);
  margin-right: calc(-47.5vw + 50%);
}

/* ---------- Project pagination ---------- */
.project-nav {
  display: flex;
  justify-content: space-between;
  align-items: stretch;
  gap: 1.5rem;
  padding: 2.5rem 0 5rem;
  margin-top: 1rem;
  border-top: 1px solid #f0f0f0;
}

.project-nav__link {
  display: inline-flex;
  flex-direction: column;
  gap: 0.35rem;
  min-width: 0;
  max-width: 48%;
  padding: 0.25rem 0;
}

.project-nav__link--prev {
  margin-right: auto;
  text-align: left;
  align-items: flex-start;
}

.project-nav__link--next {
  margin-left: auto;
  text-align: right;
  align-items: flex-end;
}

.project-nav__label {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #8a8a8a;
  transition: color 0.2s ease;
}

.project-nav__title {
  position: relative;
  display: inline-block;
  font-size: 1rem;
  font-weight: 400;
  color: #1a1a1a;
  line-height: 1.3;
}

.project-nav__title::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -3px;
  height: 1px;
  background-color: #1a1a1a;
  transform: scaleX(0);
  transition: transform 0.3s ease;
  will-change: transform;
}

.project-nav__link--next .project-nav__title::after {
  transform-origin: left center;
}

.project-nav__link--prev .project-nav__title::after {
  transform-origin: right center;
}

.project-nav__link:hover .project-nav__title::after,
.project-nav__link:focus-visible .project-nav__title::after {
  transform: scaleX(1);
}

.project-nav__link:hover .project-nav__label,
.project-nav__link:focus-visible .project-nav__label {
  color: #1a1a1a;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .project-header {
    padding: 2rem 0;
  }

  .project-header h1 {
    white-space: normal;
  }

  .portfolio-grid {
    grid-template-columns: 1fr;
    gap: 0;
  }
}

@media (max-width: 600px) {
  .site-header {
    padding: 0.75rem 1.25rem;
  }

  .site-logo img {
    height: 32px;
  }

  .site-nav {
    gap: 1rem;
  }

  .site-nav a {
    font-size: 0.875rem;
  }

  .container {
    padding: 0 1.25rem;
  }

  .hero {
    min-height: 50vh;
    padding: 2.5rem 1.25rem;
  }

  /* On touch devices, show the title overlay by default since hover doesn't exist */
  .portfolio-card__overlay {
    opacity: 1;
    background-color: rgba(26, 26, 26, 0.35);
  }

  .portfolio-card__title {
    transform: translateY(0);
    font-size: 1.5rem;
  }

  .project-nav {
    padding: 2rem 0 3rem;
    gap: 1rem;
  }

  .project-nav__title {
    font-size: 0.95rem;
  }

  .project-nav__label {
    font-size: 0.65rem;
    letter-spacing: 0.15em;
  }
}