/* Photographifi — feuille de style unique du site */

@font-face {
  font-family: "Instrument Serif";
  src: url("../fonts/instrument-serif-latin-400-normal.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Instrument Serif";
  src: url("../fonts/instrument-serif-latin-400-italic.woff2") format("woff2");
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}

:root {
  color-scheme: dark;
  --bg: #0d0e0f;
  --surface: #151617;
  --line: #2b2c2d;
  --text: #ece9e2;
  --muted: #a3a098;
  --accent: #f2c230;
  --accent-ink: #171308;

  --serif: "Instrument Serif", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "Cascadia Mono", "Segoe UI Mono", Consolas, "SF Mono", Menlo, monospace;

  --gutter: clamp(16px, 4vw, 56px);
  --wrap: 1320px;
  --gap: clamp(14px, 1.6vw, 24px);
}

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 1rem/1.6 var(--sans);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
main { flex: 1; }

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-underline-offset: 0.2em; text-decoration-thickness: 1px; }
a:hover { color: var(--accent); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

h1, h2, h3 { font-family: var(--serif); font-weight: 400; line-height: 1.05; margin: 0; text-wrap: balance; }
p { margin: 0 0 1em; }

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

.skip {
  position: absolute; left: var(--gutter); top: -4rem; z-index: 10;
  background: var(--accent); color: var(--accent-ink); padding: 0.5rem 0.9rem; text-decoration: none;
}
.skip:focus { top: 0.5rem; }

/* Petites lignes techniques : distances, définitions, compteurs */
.data {
  font: 400 0.75rem/1.4 var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}
.data b { font-weight: 400; color: var(--accent); }

/* ---------- En-tête ---------- */

.top { border-bottom: 1px solid var(--line); }
.top__in {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 0.5rem 2rem; flex-wrap: wrap;
  padding-block: 1.15rem;
}
.brand { font: 400 1.75rem/1 var(--serif); text-decoration: none; letter-spacing: 0.01em; }
.brand em { color: var(--accent); }
.brand:hover { color: var(--text); }

.nav ul { display: flex; flex-wrap: wrap; gap: 0.35rem 1.6rem; list-style: none; margin: 0; padding: 0; }
.nav a {
  display: block; padding-block: 0.35rem;
  font-size: 0.8rem; letter-spacing: 0.1em; text-transform: uppercase; text-decoration: none;
  color: var(--muted); border-bottom: 1px solid transparent;
}
.nav a:hover { color: var(--text); }
.nav a[aria-current] { color: var(--text); border-bottom-color: var(--accent); }

/* ---------- Boutons ---------- */

.btn {
  display: inline-block; padding: 0.7rem 1.25rem;
  border: 1px solid var(--text); border-radius: 2px;
  font: 400 0.85rem/1.4 var(--sans); letter-spacing: 0.06em; text-transform: uppercase; text-decoration: none;
  transition: background-color 0.15s, color 0.15s, border-color 0.15s;
}
.btn:hover { background: var(--text); color: var(--bg); }
.btn--plein { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn--plein:hover { background: var(--text); border-color: var(--text); color: var(--bg); }
.btns { display: flex; flex-wrap: wrap; gap: 0.75rem; }

/* ---------- Accueil ---------- */

.intro {
  display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: 1.5rem clamp(2rem, 6vw, 6rem); align-items: end;
  padding-block: clamp(2.5rem, 7vw, 6rem) clamp(2rem, 4vw, 3.5rem);
}
.intro h1 { font-size: clamp(2.6rem, 6.4vw, 5.4rem); line-height: 0.98; }
.intro h1 em { color: var(--accent); }
.intro__texte p { color: var(--muted); font-size: 1.08rem; max-width: 34em; }

.hero { margin: 0; }
.hero img { width: 100%; min-height: 200px; object-fit: cover; }
.hero figcaption {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.4rem 2rem;
  padding-block: 0.85rem;
}
.hero figcaption a { color: var(--text); }
.hero figcaption a:hover { color: var(--accent); }

.chiffres {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr));
  border-block: 1px solid var(--line); margin-block: clamp(2rem, 5vw, 4rem);
}
.chiffres > div { padding: clamp(1.25rem, 3vw, 2.25rem) var(--gap); border-left: 1px solid var(--line); }
.chiffres > div:first-child { border-left: 0; padding-left: 0; }
.chiffres dt { order: 2; }
.chiffres dd { margin: 0 0 0.35rem; font: 400 clamp(2.2rem, 5vw, 4rem)/1 var(--serif); }
.chiffres dd small { font-size: 0.5em; color: var(--muted); margin-left: 0.15em; }
.chiffres > div { display: flex; flex-direction: column; }

.section { padding-block: clamp(2.5rem, 6vw, 5rem); }
.section__titre { font-size: clamp(1.9rem, 3.6vw, 2.9rem); margin-bottom: clamp(1.25rem, 3vw, 2.25rem); }

.portes { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: var(--gap); }
.porte { display: block; text-decoration: none; }
.porte img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; transition: filter 0.25s; }
.porte:hover img { filter: brightness(1.12); }
.porte__nom { display: block; font: 400 clamp(1.6rem, 2.6vw, 2.2rem)/1.1 var(--serif); margin-top: 0.9rem; }
.porte:hover { color: var(--text); }
.porte:hover .porte__nom { color: var(--accent); }

.demarche { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 1.5rem clamp(2rem, 6vw, 6rem); }
.demarche blockquote { margin: 0; font: 400 clamp(1.45rem, 2.5vw, 2.05rem)/1.25 var(--serif); }
.demarche blockquote p { margin-bottom: 1.25rem; }

.livre {
  display: grid; grid-template-columns: minmax(0, 220px) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3.5rem); align-items: center;
  background: var(--surface); padding: clamp(1.25rem, 4vw, 3rem);
}
.livre img { width: 100%; }
.livre h3 { font-size: clamp(1.6rem, 3vw, 2.4rem); margin-block: 0.5rem 0.75rem; }
.livre p { color: var(--muted); max-width: 38em; }

/* ---------- Galeries ---------- */

.entete { padding-block: clamp(2rem, 5vw, 4rem) clamp(1.5rem, 3vw, 2.5rem); }
.entete h1 { font-size: clamp(2.8rem, 7vw, 5.4rem); margin-block: 0.35rem 1rem; }
.entete p:not(.data) { color: var(--muted); max-width: 44em; margin: 0; }

.grille { list-style: none; margin: 0; padding: 0; columns: 3 290px; column-gap: var(--gap); }
.grille--hautes { columns: 5 150px; }
.grille > li { break-inside: avoid; margin-bottom: calc(var(--gap) * 1.6); }
.grille > li.pano { column-span: all; }

.carte { display: block; text-decoration: none; }
.carte:hover { color: var(--text); }
.carte img { width: 100%; object-fit: cover; background: var(--surface); transition: filter 0.25s; }
.grille--hautes .carte img { object-position: 50% 0; }
.carte:hover img { filter: brightness(1.12); }
.carte__lieu { display: block; margin-top: 0.7rem; }
.carte__titre { display: block; font: 400 1.45rem/1.15 var(--serif); margin-block: 0.15rem 0.3rem; }
.carte:hover .carte__titre { color: var(--accent); }
.carte__mesures { display: flex; flex-wrap: wrap; gap: 0 1rem; }

/* ---------- Page d'une photo ---------- */

.fil { display: flex; justify-content: space-between; gap: 1rem; padding-block: 1.25rem 0; }
.fil a { text-decoration: none; }

.photo__titre { padding-block: 1rem 1.5rem; }
.photo__titre h1 { font-size: clamp(2.2rem, 5vw, 4rem); margin-top: 0.25rem; }

.visionneuse {
  position: relative; background: #000;
  /* hauteur calée sur le format de l'image (--ratio), bornée pour rester zoomable et tenir à l'écran */
  height: clamp(420px, calc(min(var(--wrap), 100vw - 2 * var(--gutter)) / var(--ratio, 1.5)), 76vh);
}
/* OpenSeadragon impose position: relative à cet élément : il lui faut donc une taille propre */
.visionneuse__zone { position: relative; width: 100%; height: 100%; }
.visionneuse__attente {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain;
  pointer-events: none; transition: opacity 0.4s;
}
.visionneuse.est-prete .visionneuse__attente { opacity: 0; }
.visionneuse__outils {
  position: absolute; left: 0.75rem; top: 0.75rem; z-index: 2;
  display: flex; gap: 1px; background: var(--line); border: 1px solid var(--line);
}
.visionneuse__outils button {
  width: 2.5rem; height: 2.5rem; padding: 0; border: 0; cursor: pointer;
  background: rgba(13, 14, 15, 0.88); color: var(--text);
  font: 400 1.15rem/1 var(--mono);
}
.visionneuse__outils button:hover { background: var(--accent); color: var(--accent-ink); }
.visionneuse__message {
  position: absolute; left: 50%; bottom: 1rem; transform: translateX(-50%); z-index: 2;
  background: rgba(13, 14, 15, 0.88); padding: 0.4rem 0.8rem; margin: 0; text-align: center;
}
.visionneuse__message[hidden] { display: none; }

.vues { display: flex; flex-wrap: wrap; gap: 0.6rem; list-style: none; margin: 0.75rem 0 0; padding: 0; }
.vues button {
  display: flex; align-items: center; gap: 0.75rem; padding: 0; text-align: left;
  border: 1px solid var(--line); background: none; cursor: pointer; opacity: 0.6;
}
.vues button img { height: 64px; width: auto; }
.vues button span { max-width: 14rem; padding-right: 0.75rem; }
.vues button:hover, .vues button[aria-pressed="true"] { opacity: 1; border-color: var(--accent); }
.vues button[aria-pressed="true"] span { color: var(--text); }

.fiche {
  display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: 1.5rem clamp(2rem, 6vw, 6rem);
  padding-block: clamp(1.75rem, 4vw, 3rem);
}
.fiche__texte { font-size: 1.08rem; max-width: 42em; }
.fiche__texte .astuce { color: var(--muted); font-size: 0.92rem; }

.specs { margin: 0; border-top: 1px solid var(--line); }
.specs > div {
  display: flex; justify-content: space-between; align-items: baseline; gap: 1.5rem;
  padding-block: 0.6rem; border-bottom: 1px solid var(--line);
}
.specs dd { margin: 0; text-align: right; font-family: var(--mono); font-size: 0.9rem; }

.situation { border-top: 1px solid var(--line); padding-block: clamp(1.75rem, 4vw, 3rem); }
.situation h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); margin-bottom: 1rem; }
.situation p { color: var(--muted); max-width: 44em; }
.situation__images { display: flex; flex-wrap: wrap; gap: var(--gap); align-items: flex-start; margin-bottom: 1.25rem; }
.situation__images figure { margin: 0; max-width: 100%; }
.situation__images img { max-height: 620px; width: auto; }
.situation__images figcaption { color: var(--muted); font-size: 0.92rem; margin-top: 0.5rem; max-width: 34em; }

.commande {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1rem 2rem;
  background: var(--surface); padding: clamp(1.25rem, 3vw, 2rem);
}
.commande p { margin: 0; max-width: 36em; }

.suite { display: grid; grid-template-columns: 1fr 1fr; gap: var(--gap); padding-block: clamp(2rem, 5vw, 4rem); }
.suite a { display: block; text-decoration: none; padding-block: 1rem; border-top: 1px solid var(--line); }
.suite a:hover { border-top-color: var(--accent); }
.suite a + a, .suite span + a { text-align: right; }
.suite strong { display: block; font: 400 1.5rem/1.15 var(--serif); margin-top: 0.2rem; }

/* ---------- Pages de texte ---------- */

.texte { max-width: 46rem; padding-bottom: clamp(2.5rem, 6vw, 5rem); }
.texte h2 { font-size: clamp(1.7rem, 3vw, 2.3rem); margin-block: 2.5rem 0.9rem; }
.texte p, .texte li { font-size: 1.06rem; }
.texte .chapo { font: 400 clamp(1.4rem, 2.4vw, 1.9rem)/1.3 var(--serif); }
.texte ul { padding-left: 1.2rem; }

.materiel { list-style: none; padding: 0 !important; border-top: 1px solid var(--line); }
.materiel li {
  display: flex; justify-content: space-between; gap: 1.5rem; align-items: baseline;
  padding-block: 0.55rem; border-bottom: 1px solid var(--line);
}

.todo { background: var(--accent); color: var(--accent-ink); padding: 0 0.35em; border-radius: 2px; font-weight: 600; }
.avis { border: 1px dashed var(--accent); padding: 0.9rem 1.1rem; color: var(--text); }

/* ---------- Tarifs ---------- */

.calcul { background: var(--surface); padding: clamp(1.1rem, 3vw, 1.75rem); margin-block: 1.5rem; }
.calcul__champs { display: flex; flex-wrap: wrap; gap: 1rem 1.5rem; align-items: flex-end; }
.calcul label { display: block; }
.calcul input {
  display: block; width: 8.5rem; margin-top: 0.35rem; padding: 0.55rem 0.7rem;
  background: var(--bg); color: var(--text); border: 1px solid var(--line); border-radius: 2px;
  font: 400 1.1rem var(--mono);
}
.calcul input:focus { border-color: var(--accent); outline: none; }
.calcul__resultats { display: flex; flex-wrap: wrap; gap: 1rem 3rem; margin-top: 1.4rem; }
.calcul output { display: block; font: 400 2.4rem/1.1 var(--serif); color: var(--accent); }
.calcul__note { margin: 1rem 0 0; }

table.prix { width: 100%; border-collapse: collapse; margin-block: 1.25rem; }
table.prix th, table.prix td { padding: 0.6rem 0.5rem; border-bottom: 1px solid var(--line); text-align: right; }
table.prix th:first-child, table.prix td:first-child { text-align: left; padding-left: 0; }
table.prix thead th { font-weight: 400; }
table.prix td { font-family: var(--mono); font-size: 0.92rem; }

/* ---------- Exposition ---------- */

.expo__infos { max-width: 46rem; margin-bottom: clamp(2rem, 5vw, 3.5rem); }
.expo__infos > div { justify-content: flex-start; }
.expo__infos dt { flex: 0 0 7rem; }
.expo__infos dd { text-align: left; font: 400 1rem/1.5 var(--sans); }
.expo .carte__titre { margin-top: 0.7rem; }
.expo__legende { color: var(--muted); margin: 0 0 0.45rem; }
.expo__tirages { list-style: none; margin: 0; padding: 0; }
.expo__tirages li + li { margin-top: 0.2rem; }

/* ---------- Section Astronomie ----------
   Contenu repris des anciennes pages (astro/), débarrassé de sa mise en forme imposée par le programme. */

.sousnav { border-bottom: 1px solid var(--line); }
.sousnav ul { display: flex; flex-wrap: wrap; gap: 0.2rem 1.5rem; list-style: none; margin: 0; padding: 0.85rem 0; }
.sousnav a { text-decoration: none; }
.sousnav a:hover { color: var(--text); }
.sousnav a[aria-current] { color: var(--accent); }
.astro .fil + .entete { padding-top: clamp(1rem, 3vw, 2rem); }

.astro__contenu { padding-bottom: clamp(2.5rem, 6vw, 5rem); overflow-wrap: break-word; }
.astro__contenu img { display: inline-block; vertical-align: middle; max-width: 100%; height: auto !important; }
.astro__contenu a img { transition: filter 0.25s; }
.astro__contenu a:hover img { filter: brightness(1.12); }
.astro__contenu ul { padding-left: 1.2rem; }
.astro__contenu table { width: min(100%, 1040px) !important; table-layout: fixed; border-collapse: collapse; margin-inline: auto; }
.astro__contenu td, .astro__contenu th { padding: 0.4rem 0.5rem; vertical-align: top; }
.astro__contenu .intro { display: block; padding: 0; }
.astro__contenu .intertitre {
  background: none; font: 400 clamp(1.5rem, 2.6vw, 2rem)/1.15 var(--serif); text-align: left !important;
  padding: 2.25rem 0 0.6rem !important; margin: 0; border-bottom: 1px solid var(--line); list-style: none;
}
.astro__contenu .intertitre, .astro__contenu .intertitre * { font-weight: 400 !important; }

/* Pages de rubrique : une vignette à gauche, son texte à droite */
.astro__contenu .grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 3fr); gap: 1.25rem clamp(1.25rem, 3vw, 2.5rem); align-items: start; }
.astro__contenu .grid > ul { margin: 0; padding: 0; list-style: none; color: var(--muted); }
.astro__contenu .grid > ul.intertitre { color: var(--text); padding-top: 1.5rem !important; }
.astro__contenu .grid > a, .astro__contenu .grid > img { justify-self: start; }

/* Visionneuses des anciennes pages (OpenSeadragon) */
.astro__contenu [id^="fenetreZoom"] { width: 100% !important; height: clamp(320px, 72vh, 860px) !important; background: #000; margin-inline: auto; }

/* Diaporama de la page d'accueil de la section */
.astro__contenu .slideshow { position: relative; width: min(100%, 640px); aspect-ratio: 1; margin: 0 auto; overflow: hidden; }
.astro__contenu .slide { position: absolute; inset: 0; width: 100%; height: 100% !important; object-fit: cover; opacity: 0; transition: opacity 1s ease-in-out; }
.astro__contenu .slide.active { opacity: 1; }

.astro__contenu input, .astro__contenu select, .astro__contenu textarea {
  background: var(--bg); color: var(--text); border: 1px solid var(--line); border-radius: 2px;
  padding: 0.3rem 0.5rem; font: 400 1rem var(--mono);
}

/* ---------- Pied de page ---------- */

.pied { border-top: 1px solid var(--line); margin-top: clamp(2rem, 5vw, 4rem); }
.pied__in {
  display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: 0.75rem 2rem;
  padding-block: 1.75rem 2.25rem;
}
.pied ul { display: flex; flex-wrap: wrap; gap: 0.3rem 1.4rem; list-style: none; margin: 0; padding: 0; }
.pied a { text-decoration: none; }

/* ---------- Petits écrans ---------- */

@media (max-width: 820px) {
  .intro, .demarche, .fiche { grid-template-columns: minmax(0, 1fr); }
  .portes { grid-template-columns: minmax(0, 1fr); }
  .porte img { aspect-ratio: 3 / 2; }
  .livre { grid-template-columns: minmax(0, 1fr); }
  .livre img { max-width: 200px; }
  .chiffres { grid-template-columns: minmax(0, 1fr); }
  .chiffres > div { border-left: 0; border-top: 1px solid var(--line); padding-inline: 0; }
  .chiffres > div:first-child { border-top: 0; }
  .visionneuse { margin-inline: calc(-1 * var(--gutter)); height: clamp(280px, calc(100vw / var(--ratio, 1.5)), 70vh); }
  .astro__contenu .grid { grid-template-columns: minmax(0, 1fr); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}