:root {
  /* Colors */
  --color-page-background: #fafafa;
  --color-text-primary: #212121;
  --color-selection-background: var(--color-text-primary);
  --color-selection-text: var(--color-page-background);

  /* Links */
  --text-link-decoration-thickness: 1px;
  --text-link-decoration-offset: 2px;
  --text-link-decoration-opacity: 40%;
  --text-link-decoration-transition: text-decoration-color 160ms ease;
  --clicked-link-color: currentColor;

  /* Rhythm */
  --site-edge-gap: 1.5rem;

  /* Layout width */
  --page-max-width: 40rem;
  --page-centered-side-padding: var(--site-edge-gap);
  --page-fixed-left-margin: var(--site-edge-gap);

  /* Global vertical spacing */
  --page-top-padding: 2.5rem;
  --header-to-content-gap: 4.5rem;
  --title-to-content-gap: 2rem;
  --content-to-nav-gap: 2rem;
  --content-to-footer-gap: 3rem;

  /* Gallery */
  --gallery-image-gap: var(--site-edge-gap);
  --content-to-gallery-gap: 1.25rem;

  /* List pages */
  --list-row-gap: 1.5rem;
  --pinned-list-row-gap: 1rem;
  --list-layout-gap: 1.5rem;
  --list-date-column-width: 6rem;

  /* Single pages */
  --single-title-to-meta-gap: 0.5rem;
  --body-paragraph-gap: 0.75rem;

  /* Footer */
  --footer-links-row-gap: 1rem;
  --footer-links-column-gap: 1.25rem;
  --footer-link-icon-gap: 0.4rem;
  --mobile-row-gap: 0.6rem;

  /* Typography */
  --base-font-size: 16px;
  --base-line-height: 1.5;
  --nav-font-size: 1rem;
  --lede-line-height: 1.5;
  --heading-font-size: 1.5rem;

  --heading-2-top-gap: 1.5rem;
  --heading-2-bottom-gap: 0.6rem;
  --heading-3-top-gap: 1.25rem;
  --heading-3-bottom-gap: 0.5rem;

  --list-title-font-size: 1rem;
  --list-date-font-size: 1rem;
  --list-category-font-size: 0.88rem;
  --single-date-font-size: var(--list-category-font-size);
}

/* Compact threshold: --page-max-width 40rem + normal --site-edge-gap 1.5rem = 41.5rem */
@media (max-width: 41.5rem) {
  :root {
    --site-edge-gap: 0.75rem;
  }
}

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

html {
  font-size: var(--base-font-size);
  -webkit-text-size-adjust: 100%;
  background: var(--color-page-background);
  color-scheme: light;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--color-page-background);
  color: var(--color-text-primary);
  font-family: ui-sans-serif, system-ui;
  line-height: var(--base-line-height);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: var(--color-selection-background);
  color: var(--color-selection-text);
}

a {
  color: inherit;
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
  transition: none;
}

img {
  display: block;
  width: 100%;
  height: auto;
  color: transparent;
}

p,
h1,
h2,
h3 {
  margin: 0;
}

h1,
h2,
h3 {
  line-height: 1.15;
  font-weight: 600;
  letter-spacing: -0.04em;
}

h1 {
  font-size: var(--heading-font-size);
}

h2,
h3 {
  font-size: 1rem;
}

/* =========================
   Global layout
   ========================= */

.site-shell {
  padding-top: var(--page-top-padding);
  padding-bottom: var(--content-to-footer-gap);
}

/* État 1 : grand écran -> contenu centré */
.site-header,
.site-main,
.site-footer {
  width: min(
    calc(100% - (var(--page-centered-side-padding) * 2)),
    var(--page-max-width)
  );
  margin-left: auto;
  margin-right: auto;
}

/* État 2 : demi-desktop et moins -> contenu plaqué à gauche */
@media (max-width: 1000px) {
  .site-header,
  .site-main,
  .site-footer {
    width: min(
      calc(100% - (var(--page-fixed-left-margin) * 2)),
      var(--page-max-width)
    );
    margin-left: var(--page-fixed-left-margin);
    margin-right: auto;
  }
}

.site-main {
  margin-top: var(--header-to-content-gap);
}

.site-footer {
  margin-top: var(--content-to-footer-gap);
}

/* =========================
   Header
   ========================= */

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  font-size: var(--nav-font-size);
}

body:has(.home-intro) .site-nav a[href="/photo/"] {
  animation: photo-spin 0.5s ease-in-out 2s 1 both;
  display: inline-block;
}

@keyframes photo-spin {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}

/* =========================
   Home page
   ========================= */

.home-intro h1 {
  margin-bottom: var(--title-to-content-gap);
}

.lede {
  font-size: 1rem;
  line-height: var(--lede-line-height);
}

/* =========================
   List pages
   ========================= */

.section-list h1 {
  margin-bottom: var(--title-to-content-gap);
}

.entry-list {
  display: grid;
  gap: var(--list-row-gap);
}

.pinned-list {
  display: grid;
  gap: var(--pinned-list-row-gap);
}

.entry-separator {
  width: 100%;
  height: 2px;
  background: var(--color-text-primary);
  margin-top: 0rem;
  margin-bottom: 0rem;
}

.entry {
  display: grid;
  grid-template-columns: var(--list-date-column-width) minmax(0, 1fr);
  column-gap: var(--list-layout-gap);
  align-items: start;
}

.entry-date {
  color: var(--color-text-primary);
  font-size: var(--list-date-font-size);
}

.page-meta {
  color: var(--color-text-primary);
  font-size: var(--single-date-font-size);
}

.entry-title {
  display: inline-block;
  font-size: var(--list-title-font-size);
}

.entry-category {
  display: block;
  margin-top: 0;
  line-height: 1.2;
  color: var(--color-text-primary);
  font-style: italic;
  font-size: var(--list-category-font-size);
}

@media (max-width: 400px) {
  :root {
    --list-layout-gap: 0.4rem;
  }
}

/* =========================
   Single pages
   ========================= */

/* Page header */

.page-header {
  margin-bottom: var(--title-to-content-gap);
}

.page-header h1 {
  margin-bottom: var(--single-title-to-meta-gap);
}

/* Prose */

.prose strong {
  font-weight: 600;
}

/* Prose headings */

.prose h2 {
  margin-top: var(--heading-2-top-gap);
  margin-bottom: var(--heading-2-bottom-gap);
}

.prose h3 {
  margin-top: var(--heading-3-top-gap);
  margin-bottom: var(--heading-3-bottom-gap);
}

.prose h2 + p,
.prose h3 + p {
  margin-top: 0;
}

/* Text links */

.text-links a {
  text-decoration-line: underline;
  text-decoration-thickness: var(--text-link-decoration-thickness);
  text-underline-offset: var(--text-link-decoration-offset);
  text-decoration-color: color-mix(
    in srgb,
    currentColor var(--text-link-decoration-opacity),
    transparent
  );
  transition: var(--text-link-decoration-transition);
}

/* Lists */

.prose ul {
  list-style: none;
  padding-left: 0;
  margin: 0;
}

.prose li {
  position: relative;
  padding-left: 1rem;
}

.prose li + li {
  margin-top: 0.1rem;
}

.prose li::before {
  content: "-";
  position: absolute;
  left: 0;
}

.prose p + ul,
.prose ul + p,
.prose p + p {
  margin-top: var(--body-paragraph-gap);
}

/* Adjacent navigation */

.single-nav {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 1rem;
  margin-top: var(--content-to-nav-gap);
  font-size: var(--nav-font-size);
}

.single-nav-newer {
  grid-column: 1;
  text-align: left;
}

.single-nav-back {
  grid-column: 2;
  text-align: center;
}

.single-nav-older {
  grid-column: 3;
  text-align: right;
}

.single-nav-no-newer .single-nav-back {
  grid-column: 1;
  text-align: left;
}

.single-nav-no-newer .single-nav-older {
  grid-column: 3;
  text-align: right;
}

.single-nav-no-older .single-nav-newer {
  grid-column: 1;
  text-align: left;
}

.single-nav-no-older .single-nav-back {
  grid-column: 3;
  text-align: right;
}

.single-nav-only-back {
  grid-template-columns: 1fr;
}

.single-nav-only-back .single-nav-back {
  grid-column: 1;
  text-align: left;
}

.single-nav a {
  display: inline-block;
  max-width: 100%;
  text-decoration: none;
}

/* Compact threshold */
@media (max-width: 41.5rem) {
  .single-nav {
    grid-template-columns: 1fr auto 1fr;
  }

  .single-nav-title {
    display: none;
  }

  .single-nav-newer {
    text-align: left;
  }

  .single-nav-back {
    text-align: center;
  }

  .single-nav-older {
    text-align: right;
  }

  .single-nav-only-back {
    grid-template-columns: 1fr;
  }

  .single-nav-only-back .single-nav-back {
    grid-column: 1;
    text-align: left;
  }

  .single-nav-no-newer .single-nav-back {
    grid-column: 1;
    text-align: left;
  }

  .single-nav-no-older .single-nav-back {
    grid-column: 3;
    text-align: right;
  }
}

/* =========================
   Gallery
   ========================= */

.gallery {
  display: grid;
  margin-top: var(--content-to-gallery-gap);
  gap: var(--gallery-image-gap);
}

.gallery.no-intro {
  margin-top: 0;
}

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

/* Footer links */

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--footer-links-row-gap) var(--footer-links-column-gap);
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: var(--nav-font-size);
}

.footer-link {
  display: inline-flex;
  align-items: center;
  gap: var(--footer-link-icon-gap);
  cursor: pointer;
}

.footer-link svg {
  width: 0.75rem;
  height: 0.75rem;
  flex-shrink: 0;
}

/* Compact threshold */
@media (max-width: 41.5rem) {
  .footer-links {
    display: grid;
    grid-auto-flow: row;
    gap: var(--mobile-row-gap);
  }
}

/* =========================
   Interaction feedback
   ========================= */

a:focus-visible {
  outline: 1px solid var(--color-text-primary);
  outline-offset: 3px;
}

a.is-click-flashing {
  color: var(--clicked-link-color);
  animation: link-click-flash 100ms ease-out forwards;
}

a.is-click-held {
  color: var(--clicked-link-color);
  opacity: 0.2;
}

.text-links a.is-click-flashing,
.text-links a.is-click-held {
  text-decoration-color: currentColor;
  transition: none;
}

@keyframes link-click-flash {
  0%,
  40% {
    color: var(--clicked-link-color);
    opacity: 0.8;
  }

  100% {
    color: var(--clicked-link-color);
    opacity: 0.2;
  }
}