:root{
  --bg:#070A16;
  --bg2:#0B1026;

  --card:rgba(255,255,255,.06);
  --card2:rgba(255,255,255,.08);
  --border:rgba(255,255,255,.10);

  --text:rgba(255,255,255,.92);
  --muted:rgba(255,255,255,.72);
  --muted2:rgba(255,255,255,.55);

  --accent:#D7C7FF;
  --accent2:#9FD3FF;

  --shadow: 0 20px 60px rgba(0,0,0,.45);
  --radius:18px;
  --radius2:24px;
}

*{box-sizing:border-box}
html{height:auto}
body{
  margin:0;
  min-height:100%;
  height:auto;
  position:relative;

  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Apple Color Emoji","Segoe UI Emoji";
  background:
    radial-gradient(1200px 700px at 20% 10%, rgba(215,199,255,.18), transparent 60%),
    radial-gradient(900px 600px at 80% 30%, rgba(159,211,255,.14), transparent 55%),
    linear-gradient(180deg, var(--bg), var(--bg2));
  color:var(--text);

  overflow-x:hidden;
  overflow-y:auto;
}

a{color:inherit; text-decoration:none}

/* =========================
   FOND ASTRAL (étoiles scintillantes)
   - 2 couches, vitesses différentes
========================= */

/* couche 1 */
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;

  background-image:
    /* petites */
    radial-gradient(1px 1px at 10% 20%, rgba(255,255,255,.65), transparent),
    radial-gradient(1px 1px at 22% 68%, rgba(255,255,255,.42), transparent),
    radial-gradient(1px 1px at 35% 32%, rgba(255,255,255,.52), transparent),
    radial-gradient(1px 1px at 45% 85%, rgba(255,255,255,.36), transparent),
    radial-gradient(1px 1px at 55% 40%, rgba(255,255,255,.60), transparent),
    radial-gradient(1px 1px at 67% 58%, rgba(255,255,255,.38), transparent),
    radial-gradient(1px 1px at 78% 22%, rgba(255,255,255,.54), transparent),
    radial-gradient(1px 1px at 86% 72%, rgba(255,255,255,.32), transparent),
    radial-gradient(1px 1px at 92% 40%, rgba(255,255,255,.44), transparent),

    /* moyennes */
    radial-gradient(2px 2px at 18% 36%, rgba(215,199,255,.28), transparent 60%),
    radial-gradient(2px 2px at 62% 28%, rgba(159,211,255,.22), transparent 60%),
    radial-gradient(2px 2px at 74% 64%, rgba(255,255,255,.20), transparent 60%),

    /* quelques grosses très discrètes */
    radial-gradient(3px 3px at 30% 72%, rgba(215,199,255,.14), transparent 65%),
    radial-gradient(3px 3px at 82% 18%, rgba(159,211,255,.12), transparent 65%);

  opacity:.55;
  z-index:0;
  mix-blend-mode: screen;
  animation: twinkleA 6.5s ease-in-out infinite alternate;
}

/* couche 2 (plus fine, autre rythme) */
body::after{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;

  background-image:
    radial-gradient(1px 1px at 14% 12%, rgba(255,255,255,.22), transparent),
    radial-gradient(1px 1px at 18% 48%, rgba(255,255,255,.18), transparent),
    radial-gradient(1px 1px at 26% 78%, rgba(255,255,255,.16), transparent),
    radial-gradient(1px 1px at 34% 26%, rgba(255,255,255,.20), transparent),
    radial-gradient(1px 1px at 44% 60%, rgba(255,255,255,.14), transparent),
    radial-gradient(1px 1px at 52% 88%, rgba(255,255,255,.16), transparent),
    radial-gradient(1px 1px at 63% 18%, rgba(255,255,255,.18), transparent),
    radial-gradient(1px 1px at 72% 44%, rgba(255,255,255,.14), transparent),
    radial-gradient(1px 1px at 84% 66%, rgba(255,255,255,.16), transparent),
    radial-gradient(1px 1px at 92% 30%, rgba(255,255,255,.18), transparent),

    radial-gradient(2px 2px at 88% 30%, rgba(159,211,255,.10), transparent 60%),
    radial-gradient(2px 2px at 40% 12%, rgba(215,199,255,.10), transparent 60%);

  opacity:.28;
  z-index:0;
  mix-blend-mode: screen;
  animation: twinkleB 9.5s ease-in-out infinite alternate;
}

@keyframes twinkleA{
  0%,100%{ opacity:.40; filter: blur(0px); }
  50%{ opacity:.70; filter: blur(.35px); }
}
@keyframes twinkleB{
  0%,100%{ opacity:.18; filter: blur(.15px); }
  50%{ opacity:.40; filter: blur(.55px); }
}

/* =========================
   LAYOUT
========================= */
.wrap{
  max-width:1120px;
  margin:0 auto;
  padding:22px 18px 28px;
  position:relative;
  z-index:1; /* contenu au-dessus des étoiles */
}

/* =========================
   HEADER
========================= */
.top{
  max-width:1120px;
  margin:0 auto;
  padding:18px 18px 0;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  position:relative;
  z-index:5;
}

.brand{display:flex; align-items:center; gap:12px}
.logo{
  width:42px; height:42px; border-radius:14px;
  background: rgba(255,255,255,.08);
  border:1px solid var(--border);
  display:grid; place-items:center;
  overflow:hidden;
  flex:0 0 auto;
}
.logo img{width:100%; height:100%; object-fit:contain}

.brand-name{letter-spacing:.22em; font-weight:700; font-size:12px; opacity:.9}
.brand-sub{font-size:12px; color:var(--muted2); margin-top:2px}

.nav{display:flex; align-items:center; gap:14px; flex-wrap:wrap}
.nav a{font-size:13px; color:var(--muted)}
.nav a:hover{color:var(--text)}

/* =========================
   BUTTONS
========================= */
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding:12px 14px;
  border-radius:14px;
  background: linear-gradient(90deg, rgba(215,199,255,.22), rgba(159,211,255,.20));
  border:1px solid rgba(255,255,255,.14);
  box-shadow: 0 10px 28px rgba(0,0,0,.25);
  color:var(--text);
  font-weight:600;
  font-size:14px;
  gap:10px;
  transition: transform .12s ease, background .12s ease, border-color .12s ease;
}
.btn:hover{transform: translateY(-1px)}
.btn:active{transform: translateY(0px)}
.btn-small{padding:10px 12px; font-size:13px; border-radius:12px}

.btn-ghost{
  background: rgba(255,255,255,.06);
  box-shadow:none;
}

/* =========================
   HOME HERO
========================= */
.hero{
  margin-top:18px;
  display:grid;
  grid-template-columns: 1fr;
  gap:18px;
  align-items:stretch;
}

.hero-left{
  padding:22px;
  border-radius: var(--radius2);
  background: rgba(255,255,255,.05);
  border:1px solid var(--border);
  box-shadow: var(--shadow);
  position:relative;
  overflow:hidden;
}

/* HERO astro (effets internes) */
.hero-astro{
  max-width: 820px;
  margin: 0 auto;
  position: relative;
  overflow: hidden;
}

.hero-astro::before{
  content:"";
  position:absolute;
  inset:-2px;
  background:
    radial-gradient(520px 260px at 18% 22%, rgba(215,199,255,.22), transparent 60%),
    radial-gradient(420px 220px at 78% 28%, rgba(159,211,255,.18), transparent 58%),
    radial-gradient(280px 180px at 60% 78%, rgba(215,199,255,.12), transparent 60%);
  pointer-events:none;
  z-index:0;
}

.hero-astro::after{
  content:"✦ ✧ ✦ ✧ ✦";
  position:absolute;
  right:18px;
  top:16px;
  font-size:12px;
  letter-spacing:.45em;
  color: rgba(255,255,255,.35);
  pointer-events:none;
  z-index:0;
}

.hero-astro > *{
  position: relative;
  z-index: 1;
}

.astro-mark{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:8px 12px;
  border-radius:999px;
  background: rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.12);
  color: rgba(255,255,255,.78);
  font-weight:700;
  font-size:12px;
  letter-spacing:.18em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

h1{
  margin:0 0 10px;
  font-size:40px;
  letter-spacing:-.02em;
}

.lead{
  margin:0;
  color:var(--muted);
  line-height:1.55;
  font-size:15px;
  max-width:62ch;
}

.astro-chips{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-top: 14px;
}

.chip{
  padding:8px 10px;
  border-radius:999px;
  font-size:12px;
  color: rgba(255,255,255,.82);
  background: rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.12);
}

.cta{
  display:flex;
  gap:12px;
  margin-top:18px;
  flex-wrap:wrap;
}

.note{
  margin-top:14px;
  color:var(--muted2);
  font-size:12px;
}

/* =========================
   SECTIONS
========================= */
.section{margin-top:22px}
.section h2{margin:0 0 10px; font-size:18px; letter-spacing:.01em}
.sub{margin:0 0 14px; color:var(--muted2); font-size:13px}

/* HOW IT WORKS */
.grid4{
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap:12px;
}
.box{
  padding:14px;
  border-radius:16px;
  background: var(--card);
  border:1px solid var(--border);
}
.box h3{margin:0 0 6px; font-size:13px}
.box p{margin:0; color:var(--muted); font-size:13px; line-height:1.45}

/* SIGNES */
.signs{
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap:10px;
}
.sign{
  padding:12px 12px;
  border-radius:14px;
  background: rgba(255,255,255,.07);
  border:1px solid rgba(255,255,255,.12);
  font-weight:700;
  color:rgba(255,255,255,.92);
  text-align:center;
  transition: transform .12s ease, background .12s ease, border-color .12s ease;
}
.sign:hover{
  transform: translateY(-1px);
  background: rgba(255,255,255,.10);
  border-color: rgba(215,199,255,.22);
}

/* =========================
   FOOTER
========================= */
.footer{
  margin-top:22px;
  padding-top:14px;
  border-top:1px solid rgba(255,255,255,.10);
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:12px;
  color:var(--muted2);
  font-size:12px;
  background:transparent;
  position:relative;
  z-index:2;
}
.footer-note{color:var(--muted2)}

/* =========================
   AUTH (login / signup) — inchangé
========================= */
.auth-body{
  background:
    radial-gradient(1200px 700px at 20% 10%, rgba(215,199,255,.18), transparent 60%),
    radial-gradient(900px 600px at 80% 30%, rgba(159,211,255,.14), transparent 55%),
    linear-gradient(180deg, var(--bg), var(--bg2));
}
.auth-wrap{display:grid;place-items:center;padding-top:28px}
.auth-card{
  width:min(520px, 100%);
  padding:18px;
  border-radius: var(--radius2);
  background: rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.12);
  box-shadow: var(--shadow);
}
.auth-title{margin:4px 0 6px;font-size:22px;letter-spacing:-.01em}
.auth-sub{margin:0 0 14px;color: var(--muted);font-size:13px;line-height:1.5}
.auth-google{
  width:100%;
  justify-content:center;
  gap:12px;
  background: rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.14);
  box-shadow:none;
}
.auth-google:hover{ background: rgba(255,255,255,.12); }
.google-icon{width:18px;height:18px;display:block}
.auth-sep{
  display:grid;
  grid-template-columns: 1fr auto 1fr;
  align-items:center;
  gap:12px;
  margin:14px 0;
  color: rgba(255,255,255,.55);
  font-size:12px;
}
.auth-sep::before,
.auth-sep::after{
  content:"";
  height:1px;
  background: rgba(255,255,255,.10);
}
.auth-form{display:grid;gap:10px}
.auth-label{font-size:12px;color: rgba(255,255,255,.75);margin-top:2px}
.auth-input{
  width:100%;
  padding:12px 12px;
  border-radius:12px;
  outline:none;
  border:1px solid rgba(255,255,255,.14);
  background: rgba(255,255,255,.06);
  color:#fff;
}
.auth-input:focus{
  border-color: rgba(215,199,255,.35);
  box-shadow: 0 0 0 3px rgba(215,199,255,.12);
}
.auth-submit{width:100%;margin-top:4px}
.auth-forgot{
  border:0;
  background: transparent;
  color: rgba(255,255,255,.70);
  text-align:left;
  padding:0;
  font-size:12px;
  cursor:pointer;
}
.auth-forgot:hover{ color: rgba(255,255,255,.92); }
.auth-legal{
  margin:10px 0 0;
  font-size:11px;
  line-height:1.45;
  color: rgba(255,255,255,.55);
}
.auth-switch{margin:10px 0 0;font-size:12px;color: rgba(255,255,255,.70)}
.auth-link{
  color: rgba(255,255,255,.92);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* =========================
   RESPONSIVE
========================= */
@media (max-width: 920px){
  h1{font-size:34px}
  .grid4{grid-template-columns: 1fr 1fr}
  .signs{grid-template-columns: 1fr 1fr 1fr}
}
@media (max-width: 520px){
  .grid4{grid-template-columns: 1fr}
  .signs{grid-template-columns: 1fr 1fr}
  .nav a:not(.btn){display:none}
}

/* accessibilité : réduire animations si demandé */
@media (prefers-reduced-motion: reduce){
  body::before, body::after{ animation:none !important; }
}

/* ==========================================================
   ✅ CHAT — AJOUT (mobile-first)
   - Corrige l'affichage cell (image, scroll, input en bas)
========================================================== */

.chat-body{
  margin:0;
  min-height:100svh;
  background:
    radial-gradient(1200px 700px at 20% 10%, rgba(215,199,255,.18), transparent 60%),
    radial-gradient(900px 600px at 80% 30%, rgba(159,211,255,.14), transparent 55%),
    linear-gradient(180deg, var(--bg), var(--bg2));
  color:var(--text);
  overflow:hidden; /* ✅ évite double scroll sur Android */
}

.chat-top{
  position:sticky;
  top:0;
  z-index:50;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:12px 14px;
  background: rgba(7,10,22,.72);
  backdrop-filter: blur(10px);
  border-bottom:1px solid rgba(255,255,255,.10);
}

.chat-brand{
  display:flex;
  align-items:center;
  gap:10px;
  min-width:0;
}

.chat-logo{
  width:36px;
  height:36px;
  border-radius:12px;
  background: rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.12);
  padding:6px;
  object-fit:contain;
  flex:0 0 auto;
}

.chat-brand-text{min-width:0}
.chat-brand-name{
  font-weight:800;
  font-size:11px;
  letter-spacing:.22em;
  opacity:.92;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.chat-brand-sub{
  font-size:11px;
  color:var(--muted2);
  margin-top:2px;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}

.chat-back{
  font-size:12px;
  color:rgba(255,255,255,.78);
  padding:10px 12px;
  border-radius:12px;
  border:1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.06);
  white-space:nowrap;
}

.chat-wrap{
  max-width:1120px;
  margin:0 auto;
  height: calc(100svh - 60px); /* approx top bar */
  min-height:0;
  display:grid;
  grid-template-columns: 1fr; /* mobile */
}

.chat-side{display:none}

.chat-panel{
  min-height:0;
  display:flex;
  flex-direction:column;
  overflow:hidden;
  border-radius: var(--radius2);
  background: rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.10);
  box-shadow: var(--shadow);
  margin:14px;
}

/* image IA en haut (mobile) */
.chat-hero{
  position:relative;
  height:220px;
  overflow:hidden;
  border-bottom:1px solid rgba(255,255,255,.10);
}
.chat-hero-img{
  width:100%;
  height:100%;
  object-fit:cover;
  object-position:center 25%;
  display:block;
}
.chat-hero-overlay{
  position:absolute;
  inset:0;
  background:
    linear-gradient(180deg, rgba(7,10,22,.05), rgba(7,10,22,.85) 85%),
    radial-gradient(700px 280px at 50% 15%, rgba(215,199,255,.18), transparent 60%);
  pointer-events:none;
}

.chat-header{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  padding:12px 14px;
  background: rgba(255,255,255,.04);
  border-bottom:1px solid rgba(255,255,255,.10);
}

.chat-title{
  font-weight:800;
  font-size:14px;
}

.chat-pill{
  display:inline-flex;
  align-items:center;
  padding:6px 10px;
  border-radius:999px;
  margin-left:8px;
  font-size:12px;
  background: rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.12);
  color: rgba(255,255,255,.86);
}

.chat-messages{
  flex:1 1 auto;
  min-height:0;
  overflow:auto;
  padding:14px 14px 10px;
}

.chat-inputbar{
  flex:0 0 auto;
  display:flex;
  gap:10px;
  padding:12px 12px calc(12px + env(safe-area-inset-bottom));
  background: rgba(7,10,22,.72);
  backdrop-filter: blur(10px);
  border-top:1px solid rgba(255,255,255,.10);
}

.chat-input{
  flex:1;
  width:100%;
  padding:12px 12px;
  border-radius:14px;
  outline:none;
  border:1px solid rgba(255,255,255,.14);
  background: rgba(255,255,255,.06);
  color:#fff;
}
.chat-input:focus{
  border-color: rgba(215,199,255,.35);
  box-shadow: 0 0 0 3px rgba(215,199,255,.12);
}

.chat-send{
  padding:12px 14px;
  border-radius:14px;
  border:1px solid rgba(255,255,255,.14);
  background: linear-gradient(90deg, rgba(215,199,255,.22), rgba(159,211,255,.20));
  color:var(--text);
  font-weight:800;
}

/* bulles */
.msg-row{
  display:grid;
  grid-template-columns: 34px 1fr;
  gap:10px;
  margin:10px 0;
  align-items:flex-end;
}

.msg-avatar, .msg-avatar-spacer{
  width:34px;
  height:34px;
  border-radius:14px;
  flex:0 0 auto;
}
.msg-avatar{
  object-fit:cover;
  border:1px solid rgba(255,255,255,.12);
}
.msg-avatar-spacer{opacity:0}

.msg-bubble{
  padding:12px 12px;
  border-radius:16px;
  border:1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.06);
  color: rgba(255,255,255,.90);
  line-height:1.45;
  font-size:14px;
  max-width:70ch;
  white-space:pre-wrap;
}

.msg-user .msg-bubble{
  justify-self:end;
  background: rgba(215,199,255,.12);
  border-color: rgba(215,199,255,.22);
}

/* Desktop : sidebar visible */
@media (min-width: 920px){
  .chat-wrap{
    grid-template-columns: 360px 1fr;
    padding:14px;
    height: calc(100vh - 60px);
  }

  .chat-panel{margin:0}

  .chat-side{
    display:flex;
    flex-direction:column;
    gap:12px;
    padding:14px;
    border-radius: var(--radius2);
    background: rgba(255,255,255,.05);
    border:1px solid rgba(255,255,255,.10);
    box-shadow: var(--shadow);
    overflow:auto;
    min-height:0;
  }

  .ai-card{
    padding:14px;
    border-radius:18px;
    background: rgba(255,255,255,.06);
    border:1px solid rgba(255,255,255,.12);
  }
  .ai-face-wrap{
    border-radius:18px;
    overflow:hidden;
    border:1px solid rgba(255,255,255,.12);
    background: rgba(255,255,255,.06);
  }
  .ai-face{
    width:100%;
    height:280px;
    object-fit:cover;
    object-position:center 25%;
    display:block;
  }
  .ai-meta{padding-top:10px}
  .ai-name{font-weight:900; font-size:16px}
  .ai-tag{color:var(--muted); font-size:13px; margin-top:4px}
  .ai-disclaimer{margin-top:auto; color:var(--muted2); font-size:12px; line-height:1.45}

  .chat-hero{display:none}
}

/* accessibilité : réduire animations si demandé (chat aussi) */
@media (prefers-reduced-motion: reduce){
  .chat-hero-overlay{ animation:none !important; }
    }