/* =========================================================
   Astrophotographie à St Barth — feuille de style
   Fond nuit, contraste lisible, accents lumineux discrets.
   ========================================================= */

:root {
  --bg: #05070d;
  --bg-raised: #0b101b;
  --surface: #111827;
  --line: rgba(173, 196, 255, 0.12);
  --line-strong: rgba(173, 196, 255, 0.28);
  --text: #e8ebf2;
  --muted: #a3acbf;          /* contraste ≈ 8:1 sur --bg */
  --accent: #a9c8ff;         /* lumière stellaire froide */
  --accent-warm: #f3cf8a;    /* touche chaude, très parcimonieuse */
  --danger: #ffb4a8;
  --radius: 14px;
  --radius-sm: 8px;
  --gutter: clamp(16px, 4vw, 48px);
  --maxw: 1440px;
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --ease: cubic-bezier(.2, .7, .2, 1);
  color-scheme: dark;
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(1px 1px at 12% 18%, rgba(255,255,255,.55), transparent 90%),
    radial-gradient(1px 1px at 72% 34%, rgba(255,255,255,.4), transparent 90%),
    radial-gradient(1.5px 1.5px at 38% 100%, rgba(169,200,255,.45), transparent 90%),
    radial-gradient(1px 1px at 88% 100%, rgba(255,255,255,.35), transparent 90%),
    radial-gradient(1px 1px at 55% 8%, rgba(243,207,138,.35), transparent 90%),
    var(--bg);
  background-attachment: fixed;
  color: var(--text);
  font: 16px/1.6 var(--font-sans);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: var(--accent); text-underline-offset: 3px; }
a:hover { color: #fff; }
button, input, select { font: inherit; color: inherit; }
svg { fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

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

.skip-link {
  position: absolute; left: 16px; top: -48px; z-index: 100;
  background: var(--accent); color: #05070d; padding: 8px 14px; border-radius: var(--radius-sm);
  font-weight: 600; text-decoration: none;
}
.skip-link:focus { top: 12px; }

.eyebrow {
  margin: 0 0 .6rem;
  font-size: .75rem; letter-spacing: .22em; text-transform: uppercase;
  color: var(--accent);
}

.button {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .75rem 1.3rem; border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: rgba(169, 200, 255, .1);
  color: var(--text); text-decoration: none; font-weight: 500;
  cursor: pointer;
  transition: background .25s var(--ease), border-color .25s var(--ease), box-shadow .25s var(--ease);
}
.button:hover { background: rgba(169, 200, 255, .18); border-color: var(--accent); box-shadow: 0 0 24px rgba(169, 200, 255, .18); color: #fff; }
.button--ghost { background: transparent; }

/* ---------- En-tête ---------- */
.site-header {
  position: absolute; inset: 0 0 auto 0; z-index: 20;
  display: flex; align-items: center; justify-content: flex-end; gap: 1rem;
  padding: 14px var(--gutter);
  background: linear-gradient(to bottom, rgba(5,7,13,.85), rgba(5,7,13,0));
}
.site-nav { display: flex; gap: 1.4rem; }
.site-nav a { color: var(--muted); text-decoration: none; font-size: .95rem; }
.site-nav a:hover { color: var(--text); }

/* ---------- Accueil ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: grid; align-items: end;
  padding: 120px var(--gutter) clamp(56px, 10vh, 110px);
  overflow: hidden;
  isolation: isolate;
}
.hero__media { position: absolute; inset: 0; z-index: -2; background: radial-gradient(ellipse at 70% 30%, #1a2440 0%, var(--bg) 65%); }
.hero__media img {
  width: 100%; height: 100%; object-fit: cover;
  opacity: 0; transform: scale(1.04);
  transition: opacity 1.2s var(--ease), transform 8s var(--ease);
}
.hero__media img.is-loaded { opacity: 1; transform: scale(1); }
.hero__veil {
  position: absolute; inset: 0; z-index: -1;
  background:
    linear-gradient(to top, var(--bg) 0%, rgba(5,7,13,.65) 35%, rgba(5,7,13,.1) 70%, rgba(5,7,13,.45) 100%),
    linear-gradient(to right, rgba(5,7,13,.7) 0%, rgba(5,7,13,0) 60%);
}
.hero__content { max-width: 640px; }
.hero h1 {
  margin: 0 0 1rem;
  font-family: var(--font-serif); font-weight: 400;
  font-size: clamp(2.3rem, 6vw, 4.6rem); line-height: 1.04; letter-spacing: -.01em;
  text-wrap: balance;
}
/* Logo : ses parties bleu nuit sont soulignées d'un fin liseré clair pour rester lisibles sur fond sombre. */
.hero__logo, .footer__logo img {
  filter: drop-shadow(0 0 1px rgba(255,255,255,.95)) drop-shadow(0 0 1px rgba(255,255,255,.75)) drop-shadow(0 0 14px rgba(169,200,255,.3));
}
.hero h1.hero__logo { margin: 0 0 1.25rem; line-height: 0; }
.hero__logo img { width: min(560px, 100%); height: auto; }
.footer__logo { display: inline-block; margin-bottom: 1rem; }
.footer__logo img { width: 200px; height: auto; }

.hero__lead { margin: 0 0 2rem; color: #cfd5e2; font-size: clamp(1rem, 1.6vw, 1.15rem); max-width: 52ch; }
.hero__credit {
  position: absolute; right: var(--gutter); bottom: 20px; margin: 0;
  max-width: min(46ch, 60vw);
  font-size: .8rem; color: var(--muted); text-align: right;
}
.hero__credit a { color: var(--text); }

/* ---------- Galerie ---------- */
.gallery, .about { max-width: var(--maxw); margin: 0 auto; padding: 72px var(--gutter) 24px; scroll-margin-top: 40px; }
.gallery__head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: .5rem 1.5rem; margin-bottom: 1.5rem; }
.gallery h2, .about h2 { margin: 0; font-family: var(--font-serif); font-weight: 400; font-size: clamp(1.8rem, 3.5vw, 2.6rem); }
.gallery__status { margin: 0; color: var(--muted); font-size: .95rem; }

.toolbar {
  position: sticky; top: 0; z-index: 10;
  display: grid; gap: 12px;
  margin: 0 calc(var(--gutter) * -1) 1.75rem; padding: 14px var(--gutter);
  background: rgba(5,7,13,.86);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.chips { display: flex; gap: 8px; overflow-x: auto; scrollbar-width: none; padding-bottom: 2px; }
.chips::-webkit-scrollbar { display: none; }
.chip {
  flex: none; display: inline-flex; align-items: center; gap: .45rem;
  padding: .45rem .95rem; border-radius: 999px;
  border: 1px solid var(--line); background: var(--bg-raised);
  color: var(--muted); cursor: pointer; font-size: .92rem;
  transition: color .2s, border-color .2s, background .2s;
}
.chip:hover { color: var(--text); border-color: var(--line-strong); }
.chip[aria-pressed="true"] { color: #05070d; background: var(--accent); border-color: var(--accent); }
.chip__count { font-size: .78rem; opacity: .75; font-variant-numeric: tabular-nums; }
.chip:disabled { opacity: .4; cursor: default; }

.toolbar__row { display: flex; flex-wrap: wrap; gap: 10px 16px; align-items: center; }
.search {
  flex: 1 1 260px; position: relative; display: flex; align-items: center;
}
.search svg { position: absolute; left: 14px; width: 18px; height: 18px; color: var(--muted); pointer-events: none; }
.search input {
  width: 100%; padding: .65rem 1rem .65rem 2.6rem;
  border-radius: 999px; border: 1px solid var(--line); background: var(--bg-raised);
  outline: none;
}
.search input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(169,200,255,.15); }
.search input::placeholder { color: #7d879b; }
.sort { display: inline-flex; align-items: center; gap: .6rem; color: var(--muted); font-size: .92rem; }
.sort select {
  padding: .55rem .9rem; border-radius: var(--radius-sm);
  border: 1px solid var(--line); background: var(--bg-raised); cursor: pointer;
}

.notice {
  margin: 0 0 1.5rem; padding: .75rem 1rem; border-radius: var(--radius-sm);
  border: 1px solid rgba(243,207,138,.3); background: rgba(243,207,138,.06); color: var(--accent-warm); font-size: .92rem;
}

/* Grille : colonnes régulières, vignettes au format 4:3 recadré pour une lecture calme */
.grid {
  list-style: none; margin: 0; padding: 0;
  display: grid; gap: clamp(12px, 1.6vw, 22px);
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 280px), 1fr));
}
.card { position: relative; }
.card__button {
  display: block; width: 100%; padding: 0; border: 0; background: none; text-align: left; cursor: pointer;
  border-radius: var(--radius);
}
.card__media {
  position: relative; aspect-ratio: 4 / 3; overflow: hidden;
  border-radius: var(--radius); background: var(--surface);
  box-shadow: 0 0 0 1px var(--line);
  transition: box-shadow .3s var(--ease);
}
.card__media img {
  width: 100%; height: 100%; object-fit: cover;
  opacity: 0; transition: opacity .6s var(--ease), transform .8s var(--ease);
}
.card__media img.is-loaded { opacity: 1; }
.card__button:hover .card__media img.is-loaded,
.card__button:focus-visible .card__media img.is-loaded { transform: scale(1.035); }
.card__button:hover .card__media { box-shadow: 0 0 0 1px var(--line-strong), 0 10px 40px -12px rgba(169,200,255,.25); }
.card__media.is-loading { background: linear-gradient(100deg, var(--surface) 30%, #18202f 50%, var(--surface) 70%) 0 0 / 300% 100%; animation: shimmer 1.6s linear infinite; }
@keyframes shimmer { to { background-position: -150% 0; } }
.card__broken {
  position: absolute; inset: 0; display: grid; place-content: center; gap: .3rem; text-align: center;
  color: var(--muted); font-size: .88rem; padding: 1rem;
}
.card__broken svg { width: 30px; height: 30px; margin: 0 auto; opacity: .7; }
.card__body { padding: .7rem .2rem 0; }
.card__title {
  margin: 0; font-size: 1rem; font-weight: 500; color: var(--text);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.card__meta { margin: .15rem 0 0; font-size: .84rem; color: var(--muted); }
.card__meta span + span::before { content: "·"; margin: 0 .45em; opacity: .6; }

/* Squelettes de chargement */
.card--skeleton .card__media { animation: shimmer 1.6s linear infinite; background: linear-gradient(100deg, var(--surface) 30%, #18202f 50%, var(--surface) 70%) 0 0 / 300% 100%; }
.card--skeleton .card__title, .card--skeleton .card__meta { height: .9em; border-radius: 4px; background: var(--surface); }
.card--skeleton .card__title { width: 70%; margin-top: .3rem; }
.card--skeleton .card__meta { width: 40%; margin-top: .5rem; }

/* Bouton « charger plus » */
.more { display: grid; justify-items: center; gap: .6rem; margin: 2.5rem 0 1rem; text-align: center; }
.more .button[disabled] { opacity: .6; cursor: progress; }
.more__info { margin: 0; color: var(--muted); font-size: .88rem; max-width: 60ch; }
.more__info:empty { display: none; }

/* États (vide, erreur) */
.state { text-align: center; padding: 64px 16px; color: var(--muted); }
.state__icon { width: 56px; height: 56px; color: var(--accent); opacity: .6; margin: 0 auto 1rem; }
.state__title { margin: 0 0 .35rem; font-size: 1.2rem; color: var(--text); }
.state__text { margin: 0 auto 1.25rem; max-width: 52ch; }
.state--error .state__icon { color: var(--danger); }

.about { padding-bottom: 64px; }
.about p { max-width: 70ch; color: var(--muted); }

.site-footer { border-top: 1px solid var(--line); padding: 24px var(--gutter); text-align: center; color: var(--muted); font-size: .88rem; }
.site-footer p { margin: 0; }
.noscript { text-align: center; color: var(--danger); padding: 1rem; }

/* ---------- Visionneuse ---------- */
.viewer {
  width: 100vw; max-width: 100vw; height: 100dvh; max-height: 100dvh;
  margin: 0; padding: 0; border: 0;
  background: rgba(3,4,8,.97); color: var(--text);
}
.viewer::backdrop { background: rgba(3,4,8,.85); }
.viewer[open] { animation: fade .3s var(--ease); }
@keyframes fade { from { opacity: 0; } }

.viewer__layout { display: grid; grid-template-columns: minmax(0, 1fr) 380px; height: 100%; }
.viewer__figure { position: relative; margin: 0; display: grid; place-items: center; min-height: 0; padding: 24px 72px; }
.viewer__frame { position: relative; width: 100%; height: 100%; display: grid; place-items: center; min-height: 0; }
.viewer__frame img { max-width: 100%; max-height: 100%; object-fit: contain; opacity: 0; transition: opacity .4s var(--ease); }
.viewer__frame img.is-loaded { opacity: 1; }
.viewer__frame.is-loading::after {
  content: ""; position: absolute; width: 36px; height: 36px; border-radius: 50%;
  border: 2px solid var(--line-strong); border-top-color: var(--accent); animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.viewer__fallback { text-align: center; color: var(--muted); }

.viewer__nav, .viewer__close {
  display: grid; place-items: center; width: 46px; height: 46px; border-radius: 50%;
  border: 1px solid var(--line); background: rgba(11,16,27,.7); color: var(--text); cursor: pointer;
  transition: border-color .2s, background .2s;
}
.viewer__nav:hover, .viewer__close:hover { border-color: var(--accent); background: rgba(169,200,255,.12); }
.viewer__nav svg, .viewer__close svg { width: 22px; height: 22px; }
.viewer__nav { position: absolute; top: 50%; transform: translateY(-50%); }
.viewer__nav--prev { left: 14px; }
.viewer__nav--next { right: 14px; }
.viewer__nav:disabled { opacity: .3; cursor: default; }

.viewer__info {
  position: relative; overflow-y: auto; padding: 72px 28px 28px;
  background: var(--bg-raised); border-left: 1px solid var(--line);
}
.viewer__close { position: absolute; top: 16px; right: 16px; }
.viewer__info h2 { margin: 0 0 .25rem; font-family: var(--font-serif); font-weight: 400; font-size: 1.7rem; line-height: 1.2; }
.viewer__author { margin: 0 0 1.5rem; color: var(--muted); }
.facts { display: grid; grid-template-columns: auto 1fr; gap: .55rem 1rem; margin: 0 0 1.5rem; font-size: .93rem; }
.facts dt { color: var(--muted); }
.facts dd { margin: 0; overflow-wrap: anywhere; }
.facts .hint { display: block; font-size: .8rem; color: var(--muted); }
.viewer__desc { white-space: pre-line; color: #cfd5e2; font-size: .93rem; margin-bottom: 1.5rem; max-height: 14em; overflow-y: auto; }
.viewer__desc:empty { display: none; }
.viewer__pos { margin: 1.25rem 0 0; font-size: .82rem; color: var(--muted); }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .viewer__layout { grid-template-columns: 1fr; grid-template-rows: minmax(0, 58dvh) 1fr; }
  .viewer__figure { padding: 56px 12px 12px; }
  .viewer__info { border-left: 0; border-top: 1px solid var(--line); padding: 24px 20px; }
  .viewer__close { position: fixed; top: 10px; right: 10px; z-index: 2; }
  .viewer__nav { top: auto; bottom: 12px; transform: none; width: 42px; height: 42px; }
}
@media (max-width: 600px) {
  .site-nav { gap: 1rem; }
  .site-nav a:last-child { display: none; }
  .hero { min-height: 88svh; }
  .hero__credit { left: var(--gutter); right: var(--gutter); max-width: none; text-align: left; bottom: 14px; }
  .sort span { display: none; }
  .gallery { padding-top: 48px; }
}