/* Constellation — portail · le ciel commun. Seul lieu nocturne par défaut de la constellation.
   Zéro JavaScript. Fontes : piles système. */
:root {
  --nuit: #10181d;
  --nuit2: #17222a;
  --craie: #d9dfda;
  --craie2: #99a5a0;
  --filet: rgba(217, 223, 218, .16);
  --filet-fort: rgba(217, 223, 218, .34);
  --pz: #c19256;      /* or, éclairci pour la nuit */
  --ether: #d98a70;   /* corail */
  --gq: #c86a52;      /* rouille */
  --oss: #5d8a68;     /* oxyde */
  --serif: 'Iowan Old Style', 'Palatino Linotype', 'Book Antiqua', Palatino, Georgia, serif;
  --mono: 'Cascadia Mono', Consolas, 'Courier New', monospace;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--nuit);
  color: var(--craie);
  font: 400 17px/1.78 var(--serif);
}
a { color: var(--craie); text-decoration-color: var(--filet-fort); text-underline-offset: .2em; }
a:hover { color: var(--ether); }
a:focus-visible, summary:focus-visible { outline: 2px solid var(--ether); outline-offset: 3px; }

.skip-link {
  position: fixed; left: 1rem; top: -4rem; z-index: 10;
  padding: .55rem .9rem; background: var(--craie); color: var(--nuit);
  font: 600 .72rem/1.4 var(--mono); letter-spacing: .08em; text-transform: uppercase; text-decoration: none;
}
.skip-link:focus { top: 1rem; }

.etiquette, .eyebrow, .statut-strip, .lot__type {
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: .14em;
  font-size: .64rem;
  font-weight: 600;
}

/* ——— masthead ——— */
.masthead {
  display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between;
  gap: .5rem 2rem;
  padding: 1.1rem clamp(1.25rem, 5vw, 3rem) 0;
}
.brand { display: inline-flex; align-items: baseline; gap: .6rem; text-decoration: none; font: 600 .72rem/1.5 var(--mono); letter-spacing: .16em; text-transform: uppercase; }
.brand em { font-style: normal; color: var(--ether); }
.topnav { display: flex; gap: 1.6rem; font: 400 .68rem/1.5 var(--mono); letter-spacing: .1em; text-transform: uppercase; }
.topnav a { text-decoration: none; border-bottom: 1px solid var(--filet-fort); padding-bottom: .15em; }
.statut-strip {
  display: flex; flex-wrap: wrap; gap: .3rem 1.6rem;
  width: 100%;
  margin-top: .9rem; padding: .7rem 0;
  border-top: 1px solid var(--filet); border-bottom: 1px solid var(--filet);
  color: var(--craie2); font-weight: 400; letter-spacing: .12em;
}
.statut-strip span::before { content: "◇"; margin-right: .5rem; color: var(--ether); }

.cadre { max-width: 72rem; margin-inline: auto; padding-inline: clamp(1.25rem, 5vw, 3rem); }

/* ——— seuil : le ciel ——— */
.threshold {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(240px, 400px);
  gap: 3rem; align-items: center;
  padding-top: clamp(3rem, 8vh, 5.5rem); padding-bottom: clamp(3rem, 7vh, 5rem);
  border-bottom: 1px solid var(--filet);
}
.eyebrow { color: var(--craie2); margin: 0 0 1.2rem; }
.threshold h1 {
  margin: 0 0 1.4rem;
  font: 400 clamp(2.6rem, 6.5vw, 4.2rem)/1.02 var(--serif);
  letter-spacing: -.02em;
  color: #eef0e9;
}
.threshold h1 em { font-style: italic; color: var(--craie2); }
.intro { margin: 0 0 2rem; max-width: 34rem; font-size: 1.0625rem; color: var(--craie2); }
.primary-action { font-size: .95rem; text-decoration: none; border-bottom: 1px solid var(--filet-fort); }

/* carte du ciel : chaque étoile porte la couleur de son livret */
.ciel { position: relative; aspect-ratio: 1 / 1.05; }
.ciel .etoile {
  position: absolute; width: 7px; height: 7px; margin: -3.5px;
  border-radius: 50%;
}
.ciel .e-pz  { background: var(--pz);  box-shadow: 0 0 14px color-mix(in srgb, var(--pz) 70%, transparent); }
.ciel .e-eth { background: var(--ether); box-shadow: 0 0 14px color-mix(in srgb, var(--ether) 70%, transparent); }
.ciel .e-gq  { background: var(--gq);  box-shadow: 0 0 14px color-mix(in srgb, var(--gq) 70%, transparent); }
.ciel .e-oss { background: var(--oss); box-shadow: 0 0 14px color-mix(in srgb, var(--oss) 70%, transparent); }
.ciel .liaison {
  position: absolute; height: 1px; transform-origin: left center;
  background: linear-gradient(90deg, var(--filet-fort), var(--filet));
}
.ciel .nom {
  position: absolute; margin: 0;
  font: 400 .56rem/1.2 var(--mono); letter-spacing: .14em; text-transform: uppercase;
  color: var(--craie2);
}
.ciel .nom a { color: var(--craie2); text-decoration: none; border-bottom: 1px solid transparent; }
.ciel .nom a:hover { color: var(--craie); border-bottom-color: var(--filet-fort); }

/* ——— lots ——— */
.lots { padding-top: clamp(3rem, 7vh, 4.5rem); padding-bottom: 1rem; }
.section-heading h2 {
  margin: 0 0 2.4rem;
  font: 400 clamp(1.9rem, 4.5vw, 2.6rem)/1.08 var(--serif); letter-spacing: -.015em;
}
.lot {
  display: grid; grid-template-columns: minmax(4rem, .3fr) 1.2fr minmax(15rem, .75fr);
  gap: 2rem; align-items: start;
  padding: 2.2rem 0;
  border-top: 1px solid var(--filet);
}
.lot:last-of-type { border-bottom: 1px solid var(--filet); }
.lot__index {
  font: 400 clamp(2.4rem, 5vw, 4rem)/.8 var(--serif);
  letter-spacing: -.02em;
}
.lot--pz .lot__index { color: var(--pz); }
.lot--ether .lot__index { color: var(--ether); }
.lot--gq .lot__index { color: var(--gq); }
.lot--oss .lot__index { color: var(--oss); }
.lot__type { margin: 0 0 .7rem; color: var(--craie2); }
.lot h3 { margin: 0 0 .8rem; font: 400 clamp(1.5rem, 3.2vw, 2.1rem)/1.08 var(--serif); letter-spacing: -.015em; }
.lot__body > p:not(.lot__type) { margin: 0 0 1.1rem; max-width: 32rem; font-size: 1rem; color: var(--craie2); }
.lot__action { font-size: .95rem; text-decoration: none; border-bottom: 1px solid var(--filet-fort); }
.lot__details { border-top: 1px solid var(--filet); }
.lot__details summary {
  cursor: pointer; padding: .7rem 0;
  font: 600 .62rem/1.5 var(--mono); letter-spacing: .12em; text-transform: uppercase;
  color: var(--craie2); list-style: none;
}
.lot__details summary::-webkit-details-marker { display: none; }
.lot__details summary::before { content: "◇ "; }
.lot--pz .lot__details summary::before { color: var(--pz); }
.lot--ether .lot__details summary::before { color: var(--ether); }
.lot--gq .lot__details summary::before { color: var(--gq); }
.lot--oss .lot__details summary::before { color: var(--oss); }
.lot__details[open] summary::before { content: "◆ "; }
.lot__details p { margin: 0 0 .8rem; font-size: .88rem; line-height: 1.6; color: var(--craie2); }
.lot__details a { font-size: .85rem; color: var(--craie); }

/* ——— régime ——— */
.regime { padding-top: clamp(3rem, 7vh, 4.5rem); padding-bottom: clamp(3.5rem, 8vh, 5rem); }
.regime h2 {
  margin: 0 0 1.6rem; max-width: 30ch;
  font: 400 clamp(1.9rem, 4.5vw, 2.6rem)/1.08 var(--serif); letter-spacing: -.015em;
}
.regime__grid {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2.5rem; max-width: 57rem;
  margin: 0 0 2rem;
}
.regime__grid p { margin: 0; font-size: 1rem; color: var(--craie2); }
.principle { max-width: 44rem; border-top: 1px solid var(--filet); border-bottom: 1px solid var(--filet); }
.principle summary {
  cursor: pointer; padding: .8rem 0;
  font: 600 .68rem/1.5 var(--mono); letter-spacing: .12em; text-transform: uppercase;
  list-style: none;
}
.principle summary::-webkit-details-marker { display: none; }
.principle summary::before { content: "◇ "; color: var(--ether); }
.principle[open] summary::before { content: "◆ "; }
.principle p { margin: 0 0 1rem; font-size: .95rem; color: var(--craie2); max-width: 40rem; }

/* ——— pied ——— */
footer {
  border-top: 1px solid var(--filet-fort);
  padding: 1.6rem clamp(1.25rem, 5vw, 3rem) 2.2rem;
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem 2rem;
  font-size: .85rem; color: var(--craie2);
}
footer p { margin: 0; max-width: 46rem; }
footer a { color: var(--craie2); }

@media (max-width: 60rem) {
  .threshold { grid-template-columns: 1fr; }
  .ciel { max-width: 340px; }
  .lot { grid-template-columns: 3rem 1fr; gap: 1.4rem; }
  .lot__details { grid-column: 1 / -1; }
  .regime__grid { grid-template-columns: 1fr; gap: 1rem; }
  footer { flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}
@media print {
  .skip-link, .topnav { display: none; }
  body { font-size: 12pt; }
}