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

:root {
  --color-bg: #ffffff;
  --color-text: #000000;
  --color-muted: #999999;
  --color-border: #999999;

  --font-main: "Helvetica Neue", Helvetica, Arial, sans-serif;

  --x: 1rem;
  --y: 1.3rem;
  --nav-height: calc(var(--x) * 2 + var(--y));

  --grid-cols: 2;
  --grid-gap: 4px;
}

@media (min-width: 640px) {
  :root {
    --x: 1.5rem;
  }
}

@media (min-width: 1024px) {
  :root {
    --grid-cols: 4;
  }
}

/* ============================================================
   Reset & base
   ============================================================ */

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

html {
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  color: var(--color-text);
  font-family: var(--font-main);
  font-size: clamp(13px, 1vw, 16px);
  font-weight: 400;
  letter-spacing: 0.0125em;
  line-height: 1.3;
  padding-top: var(--nav-height);
}

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

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

ul {
  list-style: none;
}

/* ============================================================
   Typography
   ============================================================ */

h1, h2, h3 {
  font-weight: 400;
  line-height: 1.1;
}

/* ============================================================
   Navigation
   ============================================================ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--x);
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-bg);
}

.nav__name {
  font-size: clamp(13px, 1vw, 16px);
  font-weight: 400;
  letter-spacing: 0.0125em;
}

.nav__links {
  display: flex;
  gap: var(--x);
}

.nav__links a {
  font-size: clamp(13px, 1vw, 16px);
  font-weight: 400;
  letter-spacing: 0.0125em;
  color: var(--color-text);
}

@media (hover: hover) {
  .nav__links a:hover {
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 0.3em;
  }
}

/* ============================================================
   Grid — homepage
   ============================================================ */

.grid {
  display: grid;
  grid-template-columns: repeat(var(--grid-cols), 1fr);
  gap: var(--grid-gap);
  padding: var(--grid-gap);
  padding-top: calc(var(--grid-gap) + var(--nav-height));
  margin-top: calc(-1 * var(--nav-height));
}

.grid-item {
  display: block;
  overflow: hidden;
}

.grid-item img,
.grid-item picture img {
  width: 100%;
  display: block;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  opacity: 0;
  transition: opacity 0.5s ease;
}

.grid-item picture {
  display: block;
  width: 100%;
}

.grid-item img.loaded {
  opacity: 1;
}

@media (hover: hover) {
  .grid-item:hover img {
    opacity: 0.85;
  }
}

.grid-item__title {
  display: block;
  padding: 0.4rem 0 0.6rem;
  font-size: clamp(11px, 0.85vw, 13px);
  color: var(--color-text);
  letter-spacing: 0.0125em;
}

/* ============================================================
   Project pages
   ============================================================ */

.project {
  padding: var(--x);
  padding-top: calc(var(--x) + var(--nav-height));
}

.project__header {
  margin-bottom: calc(var(--y) * 2);
}

.project__title {
  font-size: clamp(13px, 1vw, 16px);
  font-weight: 400;
  letter-spacing: 0.0125em;
}

.project__meta {
  margin-top: 0.4rem;
  font-size: clamp(11px, 0.85vw, 13px);
  color: var(--color-muted);
}

.project__meta-sep {
  color: var(--color-border);
}

.project__meta a {
  color: var(--color-muted);
  text-underline-offset: 0.3em;
  text-decoration-thickness: 1px;
}

@media (hover: hover) {
  .project__meta a:hover {
    color: var(--color-text);
  }
}

.project__images {
  display: flex;
  flex-direction: column;
  gap: var(--grid-gap);
}

.project__figure {
  width: 100%;
}

.project__figure img {
  width: 100%;
  height: auto;
  display: block;
  opacity: 0;
  transition: opacity 0.5s ease;
}

.project__figure img.loaded,
.project__figure picture img.loaded {
  opacity: 1;
}

.project__figure figcaption {
  margin-top: 0.4rem;
  font-size: clamp(11px, 0.85vw, 13px);
  color: var(--color-muted);
}

.project__description {
  max-width: 60ch;
  margin-top: calc(var(--y) * 2);
  font-size: clamp(13px, 1vw, 16px);
  line-height: 1.5;
  color: var(--color-muted);
}

.project__back {
  display: inline-block;
  margin-top: calc(var(--y) * 2);
  font-size: clamp(13px, 1vw, 16px);
  color: var(--color-muted);
}

@media (hover: hover) {
  .project__back:hover {
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 0.3em;
  }
}

/* ============================================================
   About & single-column pages
   ============================================================ */

.page {
  max-width: 60ch;
  margin: 0 auto;
  padding: calc(var(--y) * 3) var(--x) calc(var(--y) * 6);
}

.page h1 {
  font-size: clamp(13px, 1vw, 16px);
  font-weight: 400;
  margin-bottom: calc(var(--y) * 1.5);
}

.page p {
  margin-bottom: var(--y);
  line-height: 1.5;
}

/* ============================================================
   Contact form
   ============================================================ */

.contact-form {
  margin-top: calc(var(--y) * 1.5);
  display: flex;
  flex-direction: column;
  gap: calc(var(--y) * 1.5);
}

.contact-form__field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.contact-form__field label {
  font-size: clamp(11px, 0.85vw, 13px);
  color: var(--color-muted);
  letter-spacing: 0.0125em;
}

.contact-form__field input,
.contact-form__field textarea {
  font-family: var(--font-main);
  font-size: clamp(13px, 1vw, 16px);
  font-weight: 400;
  color: var(--color-text);
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--color-border);
  padding: 0.4rem 0;
  outline: none;
  resize: vertical;
  transition: border-color 150ms ease;
}

.contact-form__field input:focus,
.contact-form__field textarea:focus {
  border-bottom-color: var(--color-text);
}

.contact-form__field textarea {
  min-height: 120px;
}

.contact-form__submit {
  align-self: flex-start;
  font-family: var(--font-main);
  font-size: clamp(13px, 1vw, 16px);
  font-weight: 400;
  color: var(--color-text);
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  letter-spacing: 0.0125em;
  transition: color 150ms ease;
}

@media (hover: hover) {
  .contact-form__submit:hover {
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 0.3em;
  }
}

.contact__email {
  margin-top: calc(var(--y) * 2);
  font-size: clamp(11px, 0.85vw, 13px);
  color: var(--color-muted);
}

.contact__success {
  margin-top: var(--y);
  font-size: clamp(13px, 1vw, 16px);
  color: var(--color-muted);
}

/* ============================================================
   Exhibition listing
   ============================================================ */

.exhibition-item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: var(--y) 0;
  border-bottom: 1px solid var(--color-border);
}

.exhibition-item:first-of-type {
  border-top: 1px solid var(--color-border);
}

.exhibition-item a {
  font-size: clamp(13px, 1vw, 16px);
}

@media (hover: hover) {
  .exhibition-item a:hover {
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 0.3em;
  }
}

.exhibition-item__meta {
  font-size: clamp(11px, 0.85vw, 13px);
  color: var(--color-muted);
}

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

.footer {
  padding: var(--x);
  font-size: clamp(11px, 0.85vw, 13px);
  color: var(--color-muted);
  border-top: 1px solid var(--color-border);
  margin-top: calc(var(--y) * 2);
}