:root{
  --bg:#f7f9fc;
  --panel:#ffffff;
  --muted:#667085;
  --text:#0f172a;
  --accent:#2563eb;
  --accent-2:#7c3aed;
  --border:#e5e7eb;
  --ok:#16a34a;
  --danger:#dc2626;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  background:
    radial-gradient(1200px 800px at 20% -10%, #eaf1ff 0%, transparent 60%),
    radial-gradient(900px 600px at 120% 30%, #f5f0ff 0%, transparent 40%),
    var(--bg);
  color:var(--text);
  font: 16px/1.5 system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
}

#app{
  min-height:100%;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:24px;
}

/* HERO */
.hero{
  position:relative;
  width:100%;
  max-width:880px;
  text-align:center;
  padding:96px 24px 72px;
  background:linear-gradient(180deg, rgba(255,255,255,.85), rgba(255,255,255,.75));
  border:1px solid var(--border);
  border-radius:16px;
  backdrop-filter: blur(4px);
  box-shadow: 0 6px 20px rgba(15, 23, 42, .06);
}

.hero.hidden{ display:none; }

.title{
  font-weight:700;
  font-size: clamp(24px, 4vw, 40px);
  letter-spacing:.2px;
  margin:0 0 16px;
}

.hero-form{
  display:flex;
  gap:12px;
  justify-content:center;
  margin:16px auto 8px;
  width:min(720px, 100%);
}

.hero-input{
  flex:1;
  padding:16px 18px;
  border-radius:12px;
  border:1px solid var(--border);
  background:var(--panel);
  color:var(--text);
  outline:none;
  font-size:16px;
  transition: box-shadow .15s ease, border-color .15s ease, background .15s ease;
}
.hero-input::placeholder{ color:#98a2b3; }
.hero-input:focus{
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37,99,235,.15);
  background:#fff;
}

.btn{
  padding:14px 18px;
  border-radius:12px;
  border:1px solid transparent;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color:#fff;
  font-weight:600;
  cursor:pointer;
  transition: transform .05s ease, box-shadow .15s ease, opacity .15s ease;
  box-shadow: 0 4px 12px rgba(37,99,235,.18);
}
.btn:active{ transform:translateY(1px) }
.btn:hover{ opacity:.95 }

.btn-secondary{
  padding:10px 12px;
  border-radius:10px;
  border:1px solid var(--border);
  background:#fff;
  color:var(--text);
  cursor:pointer;
  transition: background .15s ease, box-shadow .15s ease, border-color .15s ease;
}
.btn-secondary:hover{
  background:#f9fafb;
  box-shadow: 0 2px 8px rgba(15,23,42,.06);
}

.disclaimer{
  color:var(--muted);
  font-size:13px;
  margin-top:8px;
}

/* ORB (esfera IA) */
.orb{
  --size: 140px;
  position:absolute;
  top:-70px; left:50%;
  transform:translateX(-50%);
  width:var(--size);
  height:var(--size);
  border-radius:50%;
  background:
    radial-gradient(60% 60% at 30% 30%, rgba(255,255,255,.9), rgba(255,255,255,0) 60%),
    radial-gradient(120% 120% at 110% 110%, rgba(110,168,254,.6), rgba(154,110,254,.55) 50%, rgba(0,0,0,0) 70%);
  filter: drop-shadow(0 12px 28px rgba(37,99,235,.18));
  animation: float 6s ease-in-out infinite;
  border: 1px solid rgba(15,23,42,.08);
}
.orb::after{
  content:'';
  position:absolute; inset:-14px;
  border-radius:50%;
  background: conic-gradient(from 0deg, rgba(110,168,254,.25), rgba(154,110,254,.25), rgba(110,168,254,.25));
  filter: blur(28px);
  opacity:.55;
  animation: spin 12s linear infinite;
  mask: radial-gradient(circle at center, rgba(0,0,0,0) 60%, black 62%);
}
.orb--small{
  position:static;
  width:18px; height:18px;
  transform:none;
  background:
    radial-gradient(60% 60% at 30% 30%, rgba(255,255,255,1), rgba(255,255,255,0) 60%),
    radial-gradient(120% 120% at 110% 110%, rgba(110,168,254,.9), rgba(154,110,254,.85) 50%, rgba(0,0,0,0) 70%);
  border:1px solid rgba(15,23,42,.12);
  filter:none;
}
@keyframes float{
  0%,100%{ transform:translate(-50%, 0) }
  50%{ transform:translate(-50%, -8px) }
}
@keyframes spin{
  to{ transform:rotate(360deg) }
}

/* CHAT */
.chat{
  width:min(980px, 100%);
  height:min(80vh, 720px);
  /* REMOVA o display daqui */
  flex-direction:column;
  border:1px solid var(--border);
  border-radius:16px;
  background: rgba(255,255,255,.78);
  backdrop-filter: blur(6px);
  box-shadow: 0 10px 28px rgba(15,23,42,.08);
}

/* Controle explícito de visibilidade */
.chat.hidden{ display:none; }
.chat:not(.hidden){ display:flex; }

.chat-header{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:14px 16px;
  border-bottom:1px solid var(--border);
  background: rgba(255,255,255,.65);
}

.chat-id{
  display:flex;
  align-items:center;
  gap:8px;
  font-weight:600;
}

.messages{
  flex:1;
  overflow:auto;
  padding:18px;
  display:flex;
  flex-direction:column;
  gap:12px;
  scrollbar-width: thin;              /* Firefox */
  scrollbar-color: var(--accent) #eef2f6;
  background: linear-gradient(180deg, rgba(250,251,252,.6), rgba(255,255,255,.6));
}

/* Chrome, Edge, Safari */
.messages::-webkit-scrollbar {
  width: 8px;
}

.messages::-webkit-scrollbar-track {
  background: #eef2f6;
  border-radius: 8px;
}

.messages::-webkit-scrollbar-thumb {
  background-color: var(--accent);
  border-radius: 8px;
  border: 2px solid #eef2f6;  /* cria “margem” */
}

.messages::-webkit-scrollbar-thumb:hover {
  background-color: var(--accent-2);
}

.msg{
  max-width:min(80ch, 85%);
  padding:12px 14px;
  border:1px solid var(--border);
  border-radius:14px;
  white-space:pre-wrap;
  word-break:break-word;
  box-shadow: 0 1px 0 rgba(15,23,42,.04);
}

.msg.user{
  align-self:flex-end;
  background:#eef2ff;                 /* Indigo-50 */
  border-color:#dbeafe;
}

.msg.assistant{
  align-self:flex-start;
  background:#f8fafc;                 /* Slate-50 */
  border-color:#eaeef3;
}

.msg.system{
  align-self:center;
  color:var(--muted);
  font-size:13px;
  border-style:dashed;
  background:#fff;
}

.composer{
  display:flex;
  gap:10px;
  padding:12px;
  border-top:1px solid var(--border);
  background: rgba(255,255,255,.8);
}

.composer-input{
  flex:1;
  padding:14px 16px;
  border-radius:12px;
  border:1px solid var(--border);
  background:#fff;
  color:var(--text);
  outline:none;
  transition: box-shadow .15s ease, border-color .15s ease;
}
.composer-input::placeholder{ color:#98a2b3; }
.composer-input:focus{
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37,99,235,.15);
}

/* Acessibilidade */
@media (prefers-reduced-motion: reduce){
  .orb, .orb::after { animation:none }
}


/* Lottie central (substitui a esfera grande) */
.lottie-wrap{
  display:flex;
  justify-content:center;
  align-items:center;
  margin-top:-8px;        /* ajuste fino opcional */
  margin-bottom:8px;
}

/* Opcional: reduzir um pouco o padding do hero
   já que o lottie não é absoluto como a .orb antiga */
.hero{
  padding-top: 72px;      /* antes era 96px */
}

/* Em telas muito pequenas, se quiser menor: */
/*
@media (max-width: 420px){
  #heroLottie{ height:160px; max-height:160px; }
}
*/

/* Dica: você pode remover o .orb grande do HTML;
   manteremos as regras .orb no CSS para o ícone pequeno (.orb--small) do header */