:root {
  --fundo: #f4f6f9;
  --painel: #ffffff;
  --texto: #1d2733;
  --suave: #5d6b7a;
  --borda: #dde3ea;
  --primaria: #1f4e78;
  --usuario: #e3edf7;
  --erro: #b42318;
  --ok: #1a7f37;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--fundo);
  color: var(--texto);
  display: flex;
  flex-direction: column;
  height: 100vh;
}

.topo {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 12px 16px;
  background: var(--painel);
  border-bottom: 1px solid var(--borda);
}
.topo h1 { margin: 0; font-size: 1.15rem; }
.sub { margin: 2px 0 0; color: var(--suave); font-size: 0.85rem; }

main {
  flex: 1;
  min-height: 0; /* sem isso o item flex cresce com o conteúdo e quem rola é a página, não o chat */
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
}

.boas-vindas { color: var(--suave); }
.exemplos { display: flex; flex-wrap: wrap; gap: 8px; }

.msg {
  padding: 10px 14px;
  border-radius: 10px;
  max-width: 85%;
  white-space: pre-wrap;
  line-height: 1.45;
}
.msg.usuario { align-self: flex-end; background: var(--usuario); }
.msg.assistente { align-self: flex-start; background: var(--painel); border: 1px solid var(--borda); }
.msg.erro { border-color: var(--erro); color: var(--erro); }

.etapas { list-style: none; margin: 0 0 8px; padding: 0; font-size: 0.82rem; color: var(--suave); white-space: normal; }
.etapas li { margin: 2px 0; }
.etapas .agente {
  display: inline-block;
  min-width: 104px;
  font-weight: 600;
  color: var(--primaria);
}

.download {
  display: inline-block;
  margin-top: 10px;
  padding: 8px 14px;
  background: var(--ok);
  color: #fff;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
}

details { margin-top: 10px; font-size: 0.82rem; white-space: normal; }
details pre {
  background: #0f1720;
  color: #d6e2ef;
  padding: 10px;
  border-radius: 6px;
  overflow-x: auto;
  white-space: pre;
}
.avisos { color: #8a5a00; margin: 8px 0 0; padding-left: 18px; font-size: 0.85rem; white-space: normal; }

.entrada {
  display: flex;
  gap: 8px;
  padding: 12px 16px;
  background: var(--painel);
  border-top: 1px solid var(--borda);
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
}
textarea {
  flex: 1;
  resize: vertical;
  padding: 10px;
  font: inherit;
  border: 1px solid var(--borda);
  border-radius: 8px;
}

button {
  font: inherit;
  border: 0;
  border-radius: 8px;
  padding: 8px 16px;
  background: var(--primaria);
  color: #fff;
  cursor: pointer;
}
button:disabled { opacity: 0.5; cursor: progress; }
button.secundario, button.exemplo {
  background: var(--painel);
  color: var(--primaria);
  border: 1px solid var(--borda);
}
button.exemplo { text-align: left; font-size: 0.85rem; }

.digitando::after {
  content: "…";
  animation: piscar 1s infinite;
}
@keyframes piscar { 50% { opacity: 0.2; } }

/* Abas */
[hidden] { display: none !important; }
.abas { display: flex; gap: 4px; margin-left: auto; }
.abas [role="tab"] {
  background: transparent;
  color: var(--suave);
  border: 1px solid transparent;
}
.abas [role="tab"][aria-selected="true"] {
  color: var(--primaria);
  border-color: var(--borda);
  background: var(--fundo);
  font-weight: 600;
}
.aba { flex: 1; display: flex; flex-direction: column; min-height: 0; }

/* Leitura de CT-e */
.cte-envio { max-width: 900px; width: 100%; margin: 24px auto 0; padding: 0 16px; }
.soltar {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 48px 16px;
  text-align: center;
  background: var(--painel);
  border: 2px dashed var(--borda);
  border-radius: 10px;
  cursor: pointer;
}
.soltar span { color: var(--suave); font-size: 0.9rem; }
.soltar.arrastando { border-color: var(--primaria); background: var(--usuario); }
.soltar.ocupado { opacity: 0.6; cursor: progress; }

.cte-status { max-width: 900px; width: 100%; margin: 10px auto; padding: 0 16px; font-size: 0.9rem; }
.cte-status:empty { display: none; }
.cte-status.erro { color: var(--erro); }
.cte-status.ok { color: var(--ok); }
.cte-status.carregando::after { content: "…"; animation: piscar 1s infinite; }

.cte-revisao {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, 480px);
  gap: 12px;
  padding: 0 16px 12px;
}
.cte-revisao iframe { width: 100%; height: 100%; border: 1px solid var(--borda); border-radius: 8px; background: var(--painel); }
.cte-campos { overflow-y: auto; padding-right: 4px; }
.cte-dica { margin: 0 0 8px; font-size: 0.82rem; color: var(--suave); }
.cte-campos fieldset {
  margin: 0 0 10px;
  padding: 8px 12px 4px;
  background: var(--painel);
  border: 1px solid var(--borda);
  border-radius: 8px;
}
.cte-campos legend { font-weight: 600; font-size: 0.9rem; color: var(--primaria); padding: 0 4px; }
.campo { display: flex; flex-direction: column; gap: 2px; margin-bottom: 8px; }
.campo label { font-size: 0.8rem; color: var(--suave); }
.campo input, .campo textarea {
  font: inherit;
  padding: 6px 8px;
  border: 1px solid var(--borda);
  border-radius: 6px;
  resize: vertical;
}
.campo [aria-invalid="true"] { border-color: var(--erro); }
.campo .erro { color: var(--erro); font-size: 0.75rem; }
.campo .erro:empty { display: none; }
.campo .trecho { color: var(--suave); font-size: 0.72rem; overflow-wrap: anywhere; }
.origem { display: inline-block; padding: 0 6px; border-radius: 999px; font-size: 0.7rem; font-weight: 600; }
.origem.REGRA { background: #dcf3e3; color: var(--ok); }
.origem.IA { background: var(--usuario); color: var(--primaria); }
.origem.MANUAL { background: #fdf0d5; color: #8a5a00; }
.lista .linha { display: flex; gap: 8px; align-items: flex-start; border-bottom: 1px dashed var(--borda); margin-bottom: 8px; }
.lista .linha .campo { flex: 1; min-width: 0; }
.lista button { margin-bottom: 8px; font-size: 0.8rem; padding: 4px 10px; }
.lista .remover { margin-top: 18px; }
.cte-acoes { display: flex; gap: 8px; flex-wrap: wrap; position: sticky; bottom: 0; padding: 8px 0; background: var(--fundo); }

@media (max-width: 900px) {
  .cte-revisao { grid-template-columns: 1fr; }
  .cte-revisao iframe { height: 60vh; }
}

@media (max-width: 600px) {
  .msg { max-width: 100%; }
  .sub { display: none; }
  .topo { flex-wrap: wrap; }
}

body.login { align-items: center; justify-content: center; }
.login form {
  width: min(320px, calc(100% - 32px));
  padding: 24px;
  background: var(--painel);
  border: 1px solid var(--borda);
  border-radius: 8px;
}
.login h1 { font-size: 1.2rem; margin: 0 0 16px; color: var(--primaria); }
.login .erro { color: var(--erro); font-size: 0.85rem; min-height: 1em; margin: 4px 0 12px; }
.login button { width: 100%; }