/* Footer « Ridgeline Dither » de la landing (moteur : footer.js).
   Toutes les règles sont préfixées .rdf- ; les couleurs suivent la charte Montor :
   fond presque blanc teinté de bleu, encre noire, crêtes du bleu clair #8FD3FF au bleu nuit. */
.rdf-root {
  --rdf-paper: #f5fafe;
  --rdf-ink: #0a0a0a;
  --rdf-muted: #66666b;
  --rdf-line: #e1ecf5;
  --rdf-heart: #e5484d;
  --rdf-accent: #2373ad;
  --rdf-deep: #0e4470;
  --rdf-n: 3;
  --rdf-max: 1160px;
  --rdf-scene-min: 240px;
  --rdf-sans: "Inter Tight", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --rdf-mono: "JetBrains Mono", "Geist Mono", "SF Mono", ui-monospace, Menlo, Consolas, monospace;
  --rdf-pad: clamp(20px, 3.2vw, 30px);
  position: relative; display: grid; grid-template-rows: auto minmax(var(--rdf-scene-min), 1fr);
  width: 100%; min-height: 600px; overflow: hidden; isolation: isolate;
  background: var(--rdf-paper); color: var(--rdf-ink); font-family: var(--rdf-sans);
  border-top: 1px solid var(--rdf-line); -webkit-font-smoothing: antialiased;
}
/* le texte reste dans une colonne centrée ; les montagnes (.rdf-scene) prennent toute la largeur */
.rdf-frame { position: relative; z-index: 2; width: 100%; max-width: var(--rdf-max); margin: 0 auto; }

/* chaque élément monte d'un léger flou, l'un après l'autre (--d = délai en ms) */
.rdf-r {
  opacity: 0; transform: translateY(12px); filter: blur(5px);
  transition: opacity .9s cubic-bezier(.2, .7, .1, 1), transform 1s cubic-bezier(.2, .7, .1, 1), filter .9s ease;
  transition-delay: calc(var(--d, 0) * 1ms);
}
.rdf-in .rdf-r { opacity: 1; transform: none; filter: none; }
/* sans JavaScript : tout est visible d'emblée */
.no-js .rdf-r { opacity: 1; transform: none; filter: none; }

.rdf-top {
  position: relative; z-index: 2; display: grid;
  grid-template-columns: minmax(0, 1.9fr) repeat(var(--rdf-n), minmax(0, 1fr));
  gap: 28px; padding: clamp(44px, 6.4vw, 80px) var(--rdf-pad) clamp(30px, 4vw, 52px);
}
.rdf-brand { display: flex; flex-direction: column; align-items: flex-start; gap: 18px; }
.rdf-logo { display: inline-flex; align-items: center; gap: 10px; color: var(--rdf-ink); text-decoration: none; line-height: 1; }
.rdf-logo img { display: block; width: 36px; height: 36px; object-fit: contain; transition: transform .6s cubic-bezier(.2, .7, .1, 1); }
.rdf-logo:hover img { transform: rotate(-8deg) scale(1.06); }
.rdf-logo span { font-family: "Fredoka", var(--rdf-sans); font-weight: 600; font-size: 28px; letter-spacing: -.01em; }
.rdf-tag { margin: 0; max-width: 34ch; font-size: 14px; line-height: 1.55; color: var(--rdf-muted); text-wrap: pretty; }

.rdf-col h3 {
  margin: 4px 0 18px; font: 500 10.5px/1 var(--rdf-mono); letter-spacing: .12em; text-transform: uppercase; color: var(--rdf-muted);
}
.rdf-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 11px; }
.rdf-link {
  position: relative; display: inline-flex; align-items: center; gap: 8px;
  color: var(--rdf-ink); text-decoration: none; font-size: 14px; line-height: 1.35; letter-spacing: -.005em;
  transition: color .3s ease, transform .5s cubic-bezier(.2, .7, .1, 1);
}
.rdf-link::before {
  content: ""; position: absolute; left: -12px; top: 50%; width: 7px; height: 1px; background: var(--rdf-accent);
  transform: scaleX(0); transform-origin: 0 50%; transition: transform .45s cubic-bezier(.2, .7, .1, 1);
}
.rdf-link:hover { color: var(--rdf-accent); transform: translateX(7px); }
.rdf-link:hover::before { transform: scaleX(1); }
.rdf-link:focus-visible, .rdf-logo:focus-visible { outline: 1px solid var(--rdf-accent); outline-offset: 4px; border-radius: 3px; }

.rdf-bar {
  position: relative; z-index: 2; display: flex; justify-content: space-between; align-items: center; gap: 16px;
  padding: 0 var(--rdf-pad); font-size: 12px; color: var(--rdf-muted);
}
.rdf-bar p { margin: 0; }
.rdf-credit { color: inherit; cursor: default; }
.rdf-credit strong { color: var(--rdf-ink); font-weight: 600; }
.rdf-heart { display: inline-block; width: 11px; height: 11px; margin: 0 3px; vertical-align: -1px; color: var(--rdf-heart); }
.rdf-credit:hover .rdf-heart { animation: rdf-beat 1s ease-in-out infinite; }
@keyframes rdf-beat { 0%, 60%, 100% { transform: scale(1); } 15% { transform: scale(1.3); } 32% { transform: scale(.95); } 45% { transform: scale(1.15); } }

/* la chaîne de montagnes, imprimée pixel par pixel */
.rdf-scene { position: relative; z-index: 1; margin-top: -64px; overflow: hidden; }
.rdf-scene canvas {
  position: absolute; left: 0; bottom: 0; display: block; max-width: none;
  image-rendering: pixelated; image-rendering: crisp-edges;
}
.rdf-sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }

@media (max-width: 760px) {
  .rdf-root { min-height: 0; }
  .rdf-top { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); row-gap: 36px; }
  .rdf-brand { grid-column: 1 / -1; }
  .rdf-bar { flex-direction: column; align-items: flex-start; gap: 6px; }
  .rdf-scene { margin-top: -40px; }
}
@media (prefers-reduced-motion: reduce) {
  .rdf-r, .rdf-link, .rdf-link::before, .rdf-logo img { transition: none; }
  .rdf-r { filter: none; }
  .rdf-credit:hover .rdf-heart { animation: none; }
}