/* Noël en Famille — palette bleu nuit / pétrole / ivoire / doré chaud / rubis.
   Desktop-first (1440–1920), puis responsive.
   Empilement (z-index) : 0 fond-scène · 1 overlays ciel · 2 neige (avant-plan + tombante) ·
   10 contenu · 30 barre+guirlande · 40 étincelles · 50 modale · 60 toasts.
   Composition calquée sur 01_maquettes : une scène plein écran, contenu posé dessus,
   cartes en verre sombre à liseré doré.
   Tout calque décoratif = pointer-events: none (rien ne bloque jamais les clics). */
:root {
  --nuit: #0b1626;
  --nuit-2: #101f33;
  --petrole: #1d5c73;
  --petrole-clair: #2e7d95;
  --ivoire: #f6f1e5;
  --ivoire-doux: #efe6d3;
  --dore: #d9a441;
  --dore-clair: #e8c275;
  --rubis: #a32638;
  --rubis-clair: #c9536a;
  --texte: #23303f;
  --carte: #fffdf7;
  --ombre: 0 10px 30px rgba(6, 14, 26, .35);
  --rayon: 14px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; min-height: 100vh; color: var(--ivoire-doux);
  font: 16px/1.55 "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--nuit);
}
body.modal-open { overflow: hidden; }
h1, h2, h3, p, li, blockquote, label, .badge, .btn { overflow-wrap: anywhere; }
img { max-width: 100%; }
h1, h2, h3 { font-family: Georgia, "Times New Roman", serif; color: var(--ivoire); margin: 0 0 .5em; }
h1 { font-size: 2.3rem; } h2 { font-size: 1.5rem; } h3 { font-size: 1.15rem; }
a { color: #8fc3d8; }
.muted { color: #9fb0c2; font-size: .92rem; }
.loading { color: var(--ivoire); text-align: center; padding: 3rem; }

/* ---------- fond-scène plein écran (composition des maquettes) ---------- */
/* Une seule scène cover par page : Ken Burns très lent + parallaxe de défilement (decor.js). */
#scene { position: fixed; inset: -4%; z-index: 0; pointer-events: none; will-change: transform; }
#scene::before {
  content: ""; position: absolute; inset: 0;
  background: url("/assets/fond-accueil.png") center / cover no-repeat;
  animation: kenburns 52s ease-in-out infinite alternate;
}
body[data-scene="salon"] #scene::before { background-image: url("/assets/fond-salon.png"); }
body[data-scene="familles"] #scene::before { background-image: url("/assets/fond-familles.png"); }
@keyframes kenburns { from { transform: scale(1.01); } to { transform: scale(1.07) translateY(-1.4%); } }
/* Voile de lisibilité : gauche assombri (textes posés sur la scène), bas adouci (barre de features). */
#scene::after {
  content: ""; position: absolute; inset: 0;
  background:
    linear-gradient(100deg, rgba(6,12,22,.8) 0%, rgba(6,12,22,.44) 42%, rgba(6,12,22,.12) 74%),
    radial-gradient(120% 85% at 50% 118%, rgba(6,12,22,.55), transparent 62%);
}

/* ---------- overlays ciel : étoiles transparentes + traîneau ---------- */
#sky { position: fixed; inset: 0; z-index: 1; overflow: hidden; pointer-events: none; }
.sky-layer { position: absolute; inset: 0 0 auto 0; height: 62vh; will-change: transform; }
.sky-stars {
  background-image: url("/assets/etoiles.png"); background-size: 1400px auto;
  background-repeat: repeat-x; mix-blend-mode: screen; opacity: .8;
  mask-image: linear-gradient(to bottom, #000 55%, transparent 96%);
  -webkit-mask-image: linear-gradient(to bottom, #000 55%, transparent 96%);
}
/* Calque « premier plan fondu » des maquettes : reprise floutée du bas de la scène, masquée en haut. */
#snow-fg {
  position: fixed; left: -3vw; right: -3vw; bottom: -4vh; height: 38vh; z-index: 2;
  background: url("/assets/neige-02.png") bottom center / 112% auto no-repeat;
  opacity: .45; filter: blur(1.5px); pointer-events: none; will-change: transform;
  mask-image: linear-gradient(to bottom, transparent 0%, #000 58%);
  -webkit-mask-image: linear-gradient(to bottom, transparent 0%, #000 58%);
}
#sleigh {
  position: absolute; left: 0; top: 0; height: 74px; opacity: 0;
  filter: drop-shadow(0 4px 10px rgba(0,0,0,.4));
}
@keyframes sleigh-ltr {
  0% { transform: translate(-24vw, var(--y0)); opacity: 0; }
  8% { opacity: .95; }
  50% { transform: translate(52vw, calc(var(--y0) - 2.2vh)); }
  92% { opacity: .95; }
  100% { transform: translate(128vw, var(--y0)); opacity: 0; }
}
@keyframes sleigh-rtl {
  0% { transform: translate(128vw, var(--y0)) scaleX(-1); opacity: 0; }
  8% { opacity: .95; }
  50% { transform: translate(52vw, calc(var(--y0) - 2.2vh)) scaleX(-1); }
  92% { opacity: .95; }
  100% { transform: translate(-24vw, var(--y0)) scaleX(-1); opacity: 0; }
}
#sleigh.fly-ltr { animation: sleigh-ltr var(--duree) linear forwards; }
#sleigh.fly-rtl { animation: sleigh-rtl var(--duree) linear forwards; }

/* ---------- neige tombante (particules injectées par decor.js) ---------- */
#fall { position: fixed; inset: 0; z-index: 2; overflow: hidden; pointer-events: none; }
.flake {
  position: absolute; top: 0; border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #ffffff, #dfe9f2 60%, #b9cad9);
  animation: flake-fall var(--dur, 14s) linear var(--delay, 0s) infinite;
}
@keyframes flake-fall {
  0% { transform: translate3d(0, -5vh, 0); opacity: 0; }
  7% { opacity: var(--op, .7); }
  90% { opacity: var(--op, .7); }
  100% { transform: translate3d(var(--dx, 4vw), 107vh, 0); opacity: 0; }
}

/* ---------- étincelles dorées du curseur (zone héro uniquement) ---------- */
#sparks { position: fixed; inset: 0; z-index: 40; pointer-events: none; }
.spark {
  position: absolute; width: 7px; height: 7px; border-radius: 50%;
  background: radial-gradient(circle, #fff7df 0 30%, var(--dore-clair) 55%, transparent 72%);
  box-shadow: 0 0 12px rgba(232,194,117,.85);
  animation: spark-pop .9s ease-out forwards;
}
@keyframes spark-pop {
  0% { opacity: 0; transform: translate(-50%, -50%) scale(.25); }
  25% { opacity: 1; transform: translate(-50%, -75%) scale(1); }
  100% { opacity: 0; transform: translate(-50%, -165%) scale(.4); }
}

/* ---------- barre haute + guirlande lumineuse ---------- */
#topbar {
  position: sticky; top: 0; z-index: 30;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  padding: .8rem clamp(1rem, 4vw, 3.5rem);
  background: rgba(8, 16, 29, .55); backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(217, 164, 65, .18);
}
/* Guirlande électrique : ampoules générées par decor.js, chacune scintillant à son rythme. */
#garland { position: absolute; left: 0; right: 0; bottom: -13px; height: 13px; pointer-events: none; overflow-x: clip; }
#garland .wire {
  position: absolute; left: 0; right: 0; top: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(233,224,200,.38) 12% 88%, transparent);
}
.bulb {
  position: absolute; top: 2px; width: 7px; height: 9px; border-radius: 45% 45% 55% 55%;
  background: radial-gradient(circle at 35% 28%, rgba(255,255,255,.55), var(--c) 55%, rgba(0,0,0,.25));
  box-shadow: 0 0 7px 1px var(--g); opacity: .85;
  animation: bulb-twinkle var(--tw, 4s) ease-in-out var(--tl, 0s) infinite alternate;
}
.bulb.bright { animation: bulb-flash var(--tw, 6s) ease-in-out var(--tl, 0s) infinite; }
@keyframes bulb-twinkle { from { opacity: .62; filter: brightness(.85); } to { opacity: 1; filter: brightness(1.3); } }
@keyframes bulb-flash {
  0%, 68%, 100% { opacity: .6; filter: brightness(.8); box-shadow: 0 0 6px 1px var(--g); }
  76%, 84% { opacity: 1; filter: brightness(1.8); box-shadow: 0 0 16px 4px var(--g); }
}

/* Étoiles qui clignotent lentement dans le ciel. */
.twinkle {
  position: absolute; width: 4px; height: 4px; border-radius: 50%; background: #fdf6df;
  box-shadow: 0 0 9px 2px rgba(253,246,223,.7);
  animation: star-blink var(--tw, 4s) ease-in-out var(--tl, 0s) infinite;
}
@keyframes star-blink { 0%, 100% { opacity: .08; transform: scale(.5); } 50% { opacity: 1; transform: scale(1); } }
.brand {
  font-family: Georgia, serif; font-size: 1.35rem; color: var(--dore);
  text-decoration: none; letter-spacing: .02em; min-width: 0;
}
#nav { display: flex; align-items: center; justify-content: flex-end; gap: .35rem; flex-wrap: wrap; min-width: 0; }
#nav a, #nav button {
  color: var(--ivoire); text-decoration: none; padding: .45rem .85rem;
  border-radius: 9px; border: 1px solid transparent; background: none; font: inherit; cursor: pointer;
  transition: background .15s, color .15s, border-color .15s;
  min-width: 0; max-width: 100%; text-align: center;
}
#nav a:hover, #nav button:hover { background: rgba(246, 241, 229, .1); }
#nav a.active {
  border-color: rgba(217, 164, 65, .55); color: var(--dore-clair);
  text-shadow: 0 0 14px rgba(232,194,117,.45);
}

/* ---------- contenu : entrée de vue + révélations au défilement ---------- */
#app { position: relative; z-index: 10; max-width: 1280px; margin: 0 auto; padding: 2.4rem clamp(1rem, 4vw, 2.5rem) 5rem; }
#app > *, .panel > *, .modal > * { min-width: 0; }
#app.enter { animation: app-in .4s ease-out both; }
@keyframes app-in { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
.reveal {
  opacity: 0; transform: translateY(18px);
  transition: opacity .55s ease, transform .55s cubic-bezier(.22,.61,.36,1);
  transition-delay: calc(var(--i, 0) * 70ms);
}
.reveal.on { opacity: 1; transform: none; }
/* Cartes en verre sombre à liseré doré (langage des maquettes). */
.panel {
  background: rgba(12, 22, 35, .66); backdrop-filter: blur(12px);
  border: 1px solid rgba(217, 164, 65, .22); border-radius: var(--rayon);
  box-shadow: 0 14px 40px rgba(4, 10, 20, .45);
  padding: 1.4rem 1.6rem; margin: 1.2rem 0; color: var(--ivoire-doux);
}

/* ---------- boutons : reflet doré au survol ---------- */
.btn {
  position: relative; overflow: hidden;
  display: inline-block; border: none; cursor: pointer; font: inherit; font-weight: 600;
  padding: .6rem 1.1rem; border-radius: 999px; text-decoration: none;
  max-width: 100%; text-align: center; white-space: normal;
  background: var(--petrole); color: var(--ivoire); transition: transform .12s, box-shadow .12s;
}
.btn::after {
  content: ""; position: absolute; top: 0; bottom: 0; left: -70%; width: 45%;
  background: linear-gradient(105deg, transparent, rgba(255,255,255,.38), transparent);
  transform: skewX(-18deg); transition: left .55s ease; pointer-events: none;
}
.btn:hover::after { left: 130%; }
.btn:hover { transform: translateY(-1px); box-shadow: 0 4px 14px rgba(0,0,0,.25); }
.btn.gold { background: linear-gradient(135deg, var(--dore), #b8842c); color: #241604; animation: gold-glow 6s ease-in-out infinite; }
@keyframes gold-glow { 0%, 100% { box-shadow: 0 0 0 rgba(217,164,65,0); } 50% { box-shadow: 0 0 20px rgba(217,164,65,.5); } }
.btn.ruby { background: linear-gradient(135deg, #c73a4c, #9c2436); }
.btn.ghost { background: transparent; border: 1px solid rgba(246,241,229,.4); color: var(--ivoire); }
.btn.small { padding: .35rem .7rem; font-size: .9rem; }
.btn.danger { background: transparent; color: var(--rubis-clair); border: 1px solid var(--rubis-clair); }
.btn.block { display: block; width: 100%; text-align: center; }
.btn:disabled { opacity: .5; cursor: not-allowed; transform: none; }
.btn:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--dore); outline-offset: 2px;
}

.field { display: block; margin: .8rem 0; min-width: 0; }
.field > span { display: block; margin-bottom: .3rem; font-weight: 600; }
form label, .field > label, details label { display: block; font-weight: 600; margin-bottom: .3rem; font-size: .95rem; color: var(--ivoire); }
/* Champs crème sur fond sombre (langage des maquettes 03/08). */
input, select, textarea {
  width: 100%; min-width: 0; max-width: 100%; padding: .48rem .75rem; border-radius: 10px; font: inherit; font-size: .95rem;
  border: 1px solid #cfc7b4; background: #f9f4e7; color: #223040;
  box-shadow: inset 0 1px 2px rgba(34, 48, 64, .05);
  transition: border-color .15s, box-shadow .15s;
}
input::placeholder, textarea::placeholder { color: #8290a0; }
select option { background: #f9f4e7; color: #223040; }
input:focus, select:focus, textarea:focus { border-color: var(--dore); box-shadow: 0 0 0 3px rgba(217,164,65,.3); }
textarea { min-height: 84px; resize: vertical; }
.row { display: flex; gap: 1rem; flex-wrap: wrap; }
.row .field { flex: 1 1 220px; }
.form-err { color: var(--rubis-clair); font-weight: 600; margin: .5rem 0; }
.check { display: flex; gap: .45rem; align-items: center; margin: .5rem 0; }
.check input { width: auto; }
input[type="checkbox"], input[type="radio"] { width: auto; flex: 0 0 auto; }

.badge { display: inline-block; padding: .18rem .6rem; border-radius: 999px; font-size: .8rem; font-weight: 700; }
.badge.gold { background: rgba(217,164,65,.18); color: var(--dore-clair); }
.badge.ruby { background: rgba(201,83,106,.18); color: #f0a9b8; }
.badge.teal { background: rgba(46,125,149,.22); color: #9fd0e0; }

#site-footer { position: relative; z-index: 10; text-align: center; padding: 1.2rem 2rem 2.2rem; color: var(--ivoire); }
#site-footer p { max-width: 860px; margin: 0 auto; }

/* ---------- toasts & modales ---------- */
#toasts { position: fixed; right: 1.2rem; bottom: 1.2rem; max-width: calc(100% - 2.4rem); z-index: 60; display: flex; flex-direction: column; gap: .5rem; pointer-events: none; }
.toast {
  background: var(--nuit-2); color: var(--ivoire); border-left: 4px solid var(--dore);
  padding: .7rem 1rem; border-radius: 10px; box-shadow: var(--ombre); max-width: 380px; overflow-wrap: anywhere;
  animation: toast-in .25s ease-out;
}
.toast.err { border-left-color: var(--rubis-clair); }
@keyframes toast-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
/* Le calque modale n'existe que quand [hidden] est retiré (sinon il bloquerait tous les clics). */
#modal-root {
  position: fixed; inset: 0; z-index: 50; background: rgba(6, 12, 22, .68);
  place-items: center; padding: 1rem; display: none; overflow-y: auto; overscroll-behavior: contain;
}
#modal-root:not([hidden]) { display: grid; }
.modal {
  background: rgba(13, 24, 39, .92); backdrop-filter: blur(14px);
  border: 1px solid rgba(217, 164, 65, .26); border-top: 4px solid var(--dore);
  border-radius: var(--rayon); box-shadow: 0 24px 60px rgba(2, 8, 16, .6);
  color: var(--ivoire-doux);
  max-width: 640px; width: 100%; min-width: 0; max-height: 88vh; max-height: min(88vh, calc(100dvh - 2rem)); overflow: auto; padding: 1.4rem 1.6rem;
  overscroll-behavior: contain; overflow-wrap: anywhere;
  animation: modal-in .28s cubic-bezier(.22,.61,.36,1);
}
@keyframes modal-in { from { opacity: 0; transform: translateY(14px) scale(.98); } to { opacity: 1; transform: none; } }
.modal h2 { color: var(--ivoire); }
.modal-actions { display: flex; gap: .6rem; flex-wrap: wrap; justify-content: flex-end; align-items: center; margin-top: 1.2rem; }
.modal .modal-actions .btn.block { flex: 1 1 220px; width: auto; }

@media (max-width: 900px) {
  input, select, textarea { font-size: 16px; }
  #nav a, #nav button, .btn, .btn.small { min-height: 44px; }
  .btn.small { display: inline-flex; align-items: center; justify-content: center; }
}
@media (max-width: 720px) {
  #topbar { gap: .6rem; padding: .75rem 1rem; }
  #nav { flex: 1 1 100%; justify-content: flex-start; }
  #nav a, #nav button { padding: .45rem .65rem; }
  #app { padding-top: 1.5rem; }
  .panel { padding: 1.1rem; }
  .modal { padding: 1.1rem; }
  #site-footer { padding-inline: 1rem; }
}
@media (max-width: 480px) {
  #topbar { position: relative; }
  #nav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); width: 100%; }
  #nav a, #nav button { display: flex; align-items: center; justify-content: center; }
  #nav a:last-child:nth-child(3) { grid-column: 1 / -1; }
  .modal .modal-actions > .btn { flex: 1 1 100%; width: 100%; }
  .row { gap: 0; }
  .row .field { flex-basis: 100%; }
}

/* ---------- accessibilité : mouvement ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  #sleigh, #fall, #sparks { display: none !important; }
  #scene, #sky .sky-layer, #snow-fg { transform: none !important; }
  #scene::before, #scene::after { animation: none !important; }
  #topbar, .btn, .btn::after, .btn.gold, .toast, .modal, #app.enter,
  .bulb, .bulb.bright, .twinkle, .hero-copy > *, h1.display .ltr,
  .feature, .scene-familles::before, .progress > span, .contrib-bar > span {
    animation: none !important; transition: none !important;
  }
  .reveal { opacity: 1 !important; transform: none !important; transition: none !important; }
  .btn:hover, .wish:hover, .fam-card:hover, .rule:hover { transform: none; }
  .wish, .fam-card, .rule { transition: none !important; }
}