:root {
  --topo: #008069;
  --topo-texto: #ffffff;
  --fundo: #efeae2;
  --barra: #f0f2f5;
  --campo: #ffffff;
  --balao-meu: #d9fdd3;
  --balao-outro: #ffffff;
  --texto: #111b21;
  --suave: #667781;
  --nota: #ffeecd;
  --nota-texto: #54656f;
  --verde: #00a884;
  --azul: #53bdeb;
  --erro: #c0362c;
  --sombra: 0 1px 0.5px rgba(11, 20, 26, 0.13);
  --nome-robo: #128c7e;
  --nome-pessoa: #c55a11;
}
@media (prefers-color-scheme: dark) {
  :root {
    --topo: #202c33;
    --fundo: #0b141a;
    --barra: #202c33;
    --campo: #2a3942;
    --balao-meu: #005c4b;
    --balao-outro: #202c33;
    --texto: #e9edef;
    --suave: #8696a0;
    --nota: #182229;
    --nota-texto: #ffd279;
    --nome-robo: #06cf9c;
    --nome-pessoa: #f2a66b;
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--fundo);
  color: var(--texto);
  font: 15px/1.4 -apple-system, "Segoe UI Variable Text", "Segoe UI", system-ui, Roboto, sans-serif;
  -webkit-tap-highlight-color: transparent;
}
[hidden] { display: none !important; }
.oculto { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
button { font: inherit; cursor: pointer; }
button:active { transform: scale(0.97); }

/* login */
.login {
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: 16px;
  background: linear-gradient(var(--topo) 0 220px, var(--fundo) 220px);
}
.cartao-login {
  width: 100%;
  max-width: 360px;
  background: var(--balao-outro);
  border-radius: 16px;
  padding: 28px 24px 20px;
  box-shadow: 0 0 0 1px rgba(16, 24, 40, 0.07), 0 12px 32px -20px rgba(16, 24, 40, 0.35);
  text-align: center;
}
.logo, .avatar {
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--verde);
  color: #fff;
  font-weight: 700;
}
.logo { width: 64px; height: 64px; margin: 0 auto 12px; font-size: 24px; }
.cartao-login h1 { margin: 0 0 18px; font-size: 22px; letter-spacing: -0.02em; }
.cartao-login input {
  width: 100%;
  font-size: 16px;
  padding: 12px 14px;
  border: 1px solid rgba(134, 150, 160, 0.4);
  border-radius: 10px;
  background: var(--campo);
  color: var(--texto);
  margin-bottom: 12px;
}
.cartao-login button {
  width: 100%;
  padding: 12px;
  border: 0;
  border-radius: 24px;
  background: var(--verde);
  color: #fff;
  font-weight: 600;
  font-size: 16px;
}
.erro { color: var(--erro); min-height: 1.4em; margin: 10px 0 0; font-size: 14px; }

/* conversa */
.chat {
  height: 100dvh;
  max-width: 920px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  background: var(--fundo);
}
.topo {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  padding-top: max(10px, env(safe-area-inset-top));
  background: var(--topo);
  color: var(--topo-texto);
}
.avatar { width: 40px; height: 40px; flex: none; font-size: 15px; }
.titulo { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.titulo strong { font-size: 16px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.titulo span { font-size: 13px; opacity: 0.85; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sair {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.5);
  color: inherit;
  border-radius: 16px;
  padding: 4px 12px;
  font-size: 13px;
}

.mensagens {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 12px 4% 8px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.nota {
  align-self: center;
  max-width: 90%;
  background: var(--nota);
  color: var(--nota-texto);
  font-size: 12.5px;
  text-align: center;
  padding: 6px 12px;
  border-radius: 8px;
  margin: 4px 0 10px;
  box-shadow: var(--sombra);
}
.dia {
  align-self: center;
  background: var(--balao-outro);
  color: var(--suave);
  font-size: 12.5px;
  padding: 4px 12px;
  border-radius: 8px;
  margin: 10px 0 6px;
  box-shadow: var(--sombra);
}
.balao {
  position: relative;
  max-width: min(85%, 560px);
  padding: 6px 8px 4px 9px;
  border-radius: 8px;
  box-shadow: var(--sombra);
  margin-top: 6px;
  overflow-wrap: anywhere;
}
.balao.chegou { animation: entra 0.18s cubic-bezier(0.23, 1, 0.32, 1); }
.balao.seguido { margin-top: 1px; }
.balao.meu { align-self: flex-end; background: var(--balao-meu); }
.balao.outro { align-self: flex-start; background: var(--balao-outro); }
.balao .nome { display: block; font-size: 13px; font-weight: 600; margin-bottom: 1px; color: var(--nome-pessoa); }
.balao.robo .nome { color: var(--nome-robo); }
.balao .corpo { white-space: pre-wrap; }
.balao .rodape {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--suave);
  margin-top: 2px;
}
.st-novo, .st-em_analise { color: var(--suave); }
.st-enviado, .st-pergunta { color: var(--azul); }
.st-erro { color: var(--erro); }
@keyframes entra { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }

.barra {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  padding: 8px 10px;
  padding-bottom: max(8px, env(safe-area-inset-bottom));
  background: var(--barra);
}
.barra textarea {
  flex: 1;
  resize: none;
  font: inherit;
  font-size: 16px;
  line-height: 1.35;
  max-height: 140px;
  padding: 10px 14px;
  border: 0;
  border-radius: 21px;
  background: var(--campo);
  color: var(--texto);
  outline: none;
}
.barra button {
  flex: none;
  width: 44px;
  height: 44px;
  border: 0;
  border-radius: 50%;
  background: var(--verde);
  color: #fff;
  display: grid;
  place-items: center;
}
.barra button:disabled { opacity: 0.6; }

@media (hover: hover) and (pointer: fine) {
  .sair:hover { background: rgba(255, 255, 255, 0.12); }
  .barra button:hover, .cartao-login button:hover { filter: brightness(1.05); }
}
@media (prefers-reduced-motion: reduce) {
  .balao.chegou { animation: none; }
  button:active { transform: none; }
}