/* ============================================================================
   One Design a Time — design system
   Blanc / noir · angles carrés (0 rayon) · ultra minimaliste · saillant
   ============================================================================ */
:root{
  --ink:#0a0a0a;
  --paper:#ffffff;
  --line:#e6e6e6;
  --line-strong:#111;
  --mut:#6b6b6b;
  --pad:clamp(20px,5vw,80px);
  --serif:"Playfair Display",Georgia,"Times New Roman",serif;
  --sans:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;border-radius:0!important}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--sans);font-size:16px;line-height:1.6;
  font-weight:400;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3{margin:0;font-weight:400;line-height:1.05}
p{margin:0}

/* labels de section (petites majuscules espacées) */
.section__k{
  font-size:11px;font-weight:600;letter-spacing:.22em;text-transform:uppercase;
  color:var(--ink);margin:0 0 18px;
}

/* ------------------------------------------------------------- BOUTONS ---- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  font-family:var(--sans);font-size:12px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;
  background:var(--ink);color:#fff;border:1.5px solid var(--ink);
  padding:16px 30px;cursor:pointer;transition:background .18s,color .18s;
  -webkit-appearance:none;appearance:none;
}
.btn:hover{background:#fff;color:var(--ink)}
.btn--ghost{background:#fff;color:var(--ink)}
.btn--ghost:hover{background:var(--ink);color:#fff}
.btn--big{padding:18px 34px;font-size:12px}
.btn:disabled{opacity:.32;cursor:not-allowed;pointer-events:none}
.lnk{display:inline-block;font-size:12px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;
  border-bottom:1.5px solid var(--ink);padding-bottom:3px;transition:opacity .18s}
.lnk:hover{opacity:.55}

/* --------------------------------------------------------------- NAV ------ */
.nav{
  position:sticky;top:0;z-index:40;background:var(--paper);
  display:flex;align-items:center;justify-content:space-between;
  padding:22px var(--pad);border-bottom:1px solid var(--line);
}
.nav__brand{font-weight:800;font-size:17px;letter-spacing:.02em}
.nav__links{display:flex;gap:30px}
.nav__links a{font-size:12px;font-weight:500;letter-spacing:.14em;text-transform:uppercase;color:var(--mut);transition:color .18s}
.nav__links a:hover{color:var(--ink)}

/* Bandeau d'explication du site */
.sitebar{border-bottom:1px solid var(--line);padding:13px var(--pad);text-align:center;background:var(--paper)}
.sitebar p{font-size:13px;letter-spacing:.01em;color:var(--mut);max-width:74ch;margin:0 auto;line-height:1.5}

/* --------------------------------------------------------------- HERO ----- */
.hero{
  display:grid;grid-template-columns:1fr 1fr;gap:clamp(30px,5vw,72px);
  align-items:center;padding:clamp(40px,7vw,96px) var(--pad);
}
.hero__kicker{font-family:var(--sans);font-size:12px;font-weight:600;letter-spacing:.24em;text-transform:uppercase;color:var(--ink);margin-bottom:16px}
.hero__ref{font-size:12px;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--mut);margin-top:14px}
.hero__title{font-family:var(--serif);font-size:clamp(44px,7vw,86px);font-weight:500;line-height:.98;letter-spacing:-.01em;text-transform:uppercase}
.hero__sub{margin-top:22px;font-size:18px;color:var(--ink);max-width:34ch}
.hero__resume{margin-top:16px;font-size:15px;color:var(--mut);max-width:44ch}
.hero__media img{width:100%;height:auto;filter:none}

/* Panneau d'enchère */
.auction{margin-top:38px;border:1.5px solid var(--ink);padding:26px 28px}
.auction__status{display:flex;align-items:center;gap:10px;font-size:12px;font-weight:600;letter-spacing:.12em;text-transform:uppercase}
.dot{width:9px;height:9px;background:var(--mut);display:inline-block}
.dot--en_cours{background:var(--ink);box-shadow:0 0 0 0 rgba(0,0,0,.5);animation:pulse 2s infinite}
.dot--a_venir{background:#fff;border:1.5px solid var(--ink)}
.dot--clos,.dot--termine{background:var(--mut)}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(0,0,0,.35)}70%{box-shadow:0 0 0 7px rgba(0,0,0,0)}100%{box-shadow:0 0 0 0 rgba(0,0,0,0)}}
.auction__price{margin:20px 0 6px;display:flex;flex-direction:column;gap:4px}
.auction__pricelabel{font-size:11px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--mut)}
.auction__amount{font-family:var(--serif);font-size:clamp(32px,5vw,46px);font-weight:500;line-height:1}
.auction__meta{font-size:13px;color:var(--mut)}
.auction__countdown{margin-top:16px;padding-top:16px;border-top:1px solid var(--line);font-size:13px}
.cd__label{color:var(--mut);text-transform:uppercase;letter-spacing:.12em;font-size:11px;font-weight:600}
.cd__val{font-weight:600;margin-left:6px;font-variant-numeric:tabular-nums}
.auction__actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
.auction__actions .btn{flex:1 1 auto}
.auction__hint{margin-top:16px;font-size:12.5px;color:var(--mut);line-height:1.5}

/* état vide */
.empty{min-height:60vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:80px var(--pad);gap:18px}
.empty__k{font-size:12px;letter-spacing:.2em;text-transform:uppercase;color:var(--mut)}
.empty__t{font-family:var(--serif);font-size:clamp(48px,9vw,96px);font-weight:500;text-transform:uppercase}
.empty__p{max-width:52ch;color:var(--mut)}

/* ------------------------------------------------------------- GALERIE ---- */
.gallery{
  display:grid;grid-template-columns:repeat(4,1fr);gap:2px;
  padding:0 var(--pad) clamp(20px,4vw,40px);
}
.gallery__cell{aspect-ratio:1/1;overflow:hidden;background:#f4f4f4}
.gallery__cell img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease,opacity .3s}
.gallery__cell:hover img{transform:scale(1.04)}

/* --------------------------------------------------------------- CONTE ---- */
.conte{display:grid;grid-template-columns:1fr 2fr;gap:clamp(30px,5vw,72px);
  padding:clamp(60px,8vw,110px) var(--pad);border-top:1px solid var(--line)}
.conte__note{font-size:14px;color:var(--mut);max-width:26ch}
.conte__title{font-family:var(--serif);font-size:clamp(30px,4vw,46px);font-weight:500;margin-bottom:30px}
.conte__text{font-family:var(--serif);font-size:clamp(18px,1.6vw,21px);line-height:1.75;max-width:60ch;color:#161616}
.conte__text p{margin:0 0 1.3em}
.conte__text strong{font-weight:600}
.conte__text p:last-child{margin-bottom:0}
/* Déroulant élégant avec dégradé */
.conte__wrap{position:relative}
.conte__wrap.is-collapsed{max-height:23em;overflow:hidden}
.conte__fade{display:none}
.conte__wrap.is-collapsed .conte__fade{display:block;position:absolute;left:0;right:0;bottom:0;height:12em;pointer-events:none;
  background:linear-gradient(to bottom,rgba(255,255,255,0) 0%,rgba(255,255,255,.85) 55%,#fff 92%)}
.conte__more{margin-top:22px;background:#fff;border:1.5px solid var(--ink);color:var(--ink);font-family:var(--sans);
  font-size:12px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;padding:13px 26px;cursor:pointer;transition:background .18s,color .18s}
.conte__more:hover{background:var(--ink);color:#fff}
.conte__more[hidden]{display:none}

/* ------------------------------------------------------------- FICHE ------ */
.fiche{padding:clamp(60px,8vw,110px) var(--pad);border-top:1px solid var(--line)}
.fiche__head{margin-bottom:36px}
.fiche__title{font-family:var(--serif);font-size:clamp(28px,3.5vw,42px);font-weight:500}
.fiche__list{margin:0;max-width:760px}
.fiche__row{display:grid;grid-template-columns:1fr 1.4fr;gap:20px;padding:15px 0;border-top:1px solid var(--line)}
.fiche__row:last-child{border-bottom:1px solid var(--line)}
.fiche__row dt{margin:0;font-size:12px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--mut)}
.fiche__row dd{margin:0;font-size:16px;color:var(--ink)}

/* --------------------------------------------------------------- INFOS ---- */
.infos{display:grid;grid-template-columns:1fr 1fr;gap:clamp(30px,5vw,72px);
  padding:clamp(50px,6vw,90px) var(--pad);border-top:1px solid var(--line)}
.infos__col p{color:#222;max-width:44ch;margin-bottom:14px}

/* ----------------------------------------------------------- HISTORIQUE ---- */
.histo{padding:clamp(60px,8vw,110px) var(--pad);border-top:1px solid var(--ink);background:var(--ink);color:#fff}
.histo .section__k{color:#fff}
.histo__title{font-family:var(--serif);font-size:clamp(28px,3.5vw,44px);font-weight:500;margin-bottom:40px;color:#fff}
.histo__empty{color:#9a9a9a;max-width:50ch;font-size:16px}
.histo__grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:2px}
.histo__card{background:#111}
.histo__img{aspect-ratio:4/5;overflow:hidden;background:#1a1a1a}
.histo__img img{width:100%;height:100%;object-fit:cover;filter:grayscale(.15)}
.histo__info{padding:18px}
.histo__ref{font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:#8a8a8a}
.histo__info h3{font-family:var(--serif);font-size:22px;font-weight:500;margin:6px 0 10px;color:#fff}
.histo__price{font-size:12px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:#fff}

/* ------------------------------------------------------------- CONTACT ---- */
.contact{display:grid;grid-template-columns:1fr 1fr;gap:clamp(30px,5vw,72px);
  padding:clamp(60px,8vw,110px) var(--pad);border-top:1px solid var(--line)}
.contact__title{font-family:var(--serif);font-size:clamp(28px,3.5vw,44px);font-weight:500;margin-bottom:16px}
.contact__intro{color:var(--mut);max-width:40ch;margin-bottom:20px}
.contact__email a{border-bottom:1.5px solid var(--ink);padding-bottom:2px;font-weight:500}
.field{display:flex;flex-direction:column;gap:8px;margin-bottom:18px}
.field span{font-size:11px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--mut)}
.field input,.field textarea{
  font-family:var(--sans);font-size:15px;color:var(--ink);background:#fff;
  border:1.5px solid var(--ink);padding:13px 14px;width:100%;-webkit-appearance:none;appearance:none;
}
.field input:focus,.field textarea:focus{outline:none;box-shadow:inset 0 0 0 1.5px var(--ink)}
.field textarea{resize:vertical}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}
.formmsg{margin-top:14px;font-size:13.5px;min-height:1.2em}
.formmsg.is-ok{color:#0a0a0a;font-weight:600}
.formmsg.is-err{color:#b00020;font-weight:600}

/* --------------------------------------------------------------- FOOTER --- */
.foot{display:flex;flex-wrap:wrap;gap:16px;justify-content:space-between;align-items:center;
  padding:30px var(--pad);border-top:1px solid var(--line);font-size:12px;color:var(--mut)}
.foot__base{font-family:var(--serif);font-style:italic;font-size:14px}
.foot__admin{font-size:11px;letter-spacing:.12em;text-transform:uppercase}

/* --------------------------------------------------------------- MODALE ---- */
.modal{position:fixed;inset:0;z-index:80;display:flex;align-items:center;justify-content:center;
  background:rgba(10,10,10,.6);padding:20px}
.modal[hidden]{display:none}
.modal__box{background:#fff;border:1.5px solid var(--ink);max-width:460px;width:100%;padding:34px;position:relative;max-height:92vh;overflow:auto}
.modal__close,.lb__close{position:absolute;top:14px;right:16px;background:none;border:0;font-size:20px;cursor:pointer;line-height:1;color:var(--ink)}
.modal__title{font-family:var(--serif);font-size:30px;font-weight:500;margin:2px 0 8px}
.modal__amount{font-size:14px;color:var(--mut);margin-bottom:20px}
.modal__box .btn{width:100%;margin-top:6px}
.modal__legal{font-size:11.5px;color:var(--mut);margin-top:14px;line-height:1.5}

/* ------------------------------------------------------------- LIGHTBOX ---- */
.lb{position:fixed;inset:0;z-index:90;background:rgba(255,255,255,.98);display:flex;align-items:center;justify-content:center}
.lb[hidden]{display:none}
.lb__img{max-width:88vw;max-height:88vh;object-fit:contain;border:1px solid var(--line)}
.lb__close{position:fixed;top:22px;right:26px;font-size:26px}
.lb__nav{position:fixed;top:50%;transform:translateY(-50%);background:none;border:0;font-size:52px;cursor:pointer;color:var(--ink);padding:0 18px;line-height:1}
.lb__prev{left:2vw}.lb__next{right:2vw}

/* ------------------------------------------------------------- RESPONSIVE -- */
@media(max-width:900px){
  .hero{grid-template-columns:1fr}
  .hero__media{order:-1}
  .conte,.contact,.infos{grid-template-columns:1fr}
  .gallery{grid-template-columns:repeat(3,1fr)}
  .nav__links{gap:16px}
  .nav__links a:nth-child(2),.nav__links a:nth-child(4){display:none}
}
@media(max-width:560px){
  .gallery{grid-template-columns:repeat(2,1fr)}
  .row2{grid-template-columns:1fr}
  .fiche__row{grid-template-columns:1fr;gap:4px}
  .nav__brand{font-size:14px}
  .foot{flex-direction:column;align-items:flex-start;gap:10px}
}