/* Tokens. Contrastes conferidos (WCAG AA): texto >= 4.5:1, bordas de campo/foco >= 3:1, nos dois temas. */
:root {
  color-scheme: light dark;
  --bg: #f6f5f1; --panel: #ffffff; --text: #1d1d1b; --muted: #5f5f59; --line: #e3e1d9;
  --field: #8a887f;               /* borda de campos/botões: 3.2:1 sobre --bg */
  --accent: #0f6b5c; --accent-text: #ffffff; --focus: #0f6b5c;
  --bot: #eef2ef; --user: #0f6b5c; --user-text: #ffffff;
  --err: #b3261e; --err-bg: #fdf0ef; --err-text-on: #ffffff;
  --warn-bg: #fff4d6; --warn-text: #5c4300; --ok: #0f6b5c;
  --pad-x: clamp(16px, 5vw, 56px);
  --radius: 10px;
  --tap: 44px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131513; --panel: #1b1e1b; --text: #ecece6; --muted: #a3a39b; --line: #2d312d;
    --field: #757a75;
    --accent: #3fb8a0; --accent-text: #0b1311; --focus: #7fdcc8;
    --bot: #232823; --user: #2a7d6d; --user-text: #ffffff;
    --err: #f2b8b5; --err-bg: #2c1615; --err-text-on: #3b0b08;
    --warn-bg: #3a300f; --warn-text: #ffe08a; --ok: #3fb8a0;
  }
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; } /* garante que [hidden] vença regras de display */
html, body { height: 100%; margin: 0; }
body { background: var(--bg); color: var(--text); font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
h1, h2, h3, p { margin: 0; }
.muted { color: var(--muted); font-weight: 400; }

.sr {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap; border: 0;
}
.skip {
  position: absolute; left: 8px; top: -100px; z-index: 10; padding: 10px 14px; border-radius: var(--radius);
  background: var(--accent); color: var(--accent-text); font-weight: 600; text-decoration: none;
}
.skip:focus { top: 8px; }

:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }

/* ---------- layout ---------- */
.app { display: grid; grid-template-columns: 300px minmax(0, 1fr); height: 100vh; height: 100dvh; }
.side { background: var(--panel); border-right: 1px solid var(--line); padding: 24px 20px; overflow-y: auto; display: flex; flex-direction: column; gap: 14px; }
.side h1 { font-size: 1.15rem; line-height: 1.3; }
.hint { color: var(--muted); font-size: .9rem; }

.progress-title { font-size: .95rem; margin-bottom: 6px; }
.steps { list-style: none; padding: 0; margin: 0; display: grid; gap: 4px; }
.steps li { display: flex; gap: 10px; align-items: center; padding: 8px 10px; border-radius: 8px; color: var(--muted); font-size: .95rem; }
.steps .dot { width: 24px; height: 24px; border-radius: 50%; border: 2px solid var(--field); display: grid; place-items: center; font-size: .72rem; flex: none; }
.steps li.done { color: var(--text); }
.steps li.done .dot { background: var(--ok); border-color: var(--ok); color: var(--accent-text); }
.steps li.now { background: var(--bot); color: var(--text); font-weight: 600; }
.steps li.now .dot { border-color: var(--accent); border-width: 3px; }
.side-actions { margin-top: auto; display: grid; gap: 8px; }

.chat { display: flex; flex-direction: column; min-height: 0; min-width: 0; }
.log { flex: 1; min-height: 0; overflow-y: auto; overscroll-behavior: contain; padding: 24px var(--pad-x); display: flex; flex-direction: column; gap: 12px; }
.log:focus-visible { outline-offset: -3px; }
.loading { color: var(--muted); align-self: center; margin: auto 0; }

/* ---------- mensagens ---------- */
.msg { position: relative; max-width: min(680px, 88%); padding: 10px 14px; border-radius: 14px; border: 1px solid transparent; }
.msg .body { white-space: pre-wrap; overflow-wrap: anywhere; }
.msg ul, .msg ol { margin: 6px 0; padding-left: 22px; white-space: normal; }
.msg.bot { background: var(--bot); align-self: flex-start; border-bottom-left-radius: 4px; }
.msg.user { background: var(--user); color: var(--user-text); align-self: flex-end; border-bottom-right-radius: 4px; }
.msg.err { background: var(--err-bg); color: var(--text); border-color: var(--err); align-self: center; font-size: .95rem; }
.msg.err p::before { content: "⚠ "; content: "⚠ " / ""; color: var(--err); }
.msg.note { background: transparent; color: var(--muted); border-color: var(--line); align-self: center; font-size: .92rem; }
.msg .actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.msg.pending .body:empty::before { content: "Escrevendo"; color: var(--muted); }
.msg.pending .body::after { content: "▍"; content: "▍" / ""; animation: blink 1s steps(2) infinite; }
@keyframes blink { 50% { opacity: 0; } }

.banner { margin: 12px var(--pad-x) 0; padding: 10px 14px; border-radius: var(--radius); background: var(--warn-bg); color: var(--warn-text); border: 1px solid currentColor; font-size: .95rem; }
.jump { align-self: center; position: relative; z-index: 1; margin: -60px auto 12px; box-shadow: 0 2px 8px rgb(0 0 0 / .2); }

/* ---------- composer ---------- */
.composer {
  display: flex; gap: 10px; align-items: flex-start;
  padding: 14px var(--pad-x) calc(14px + env(safe-area-inset-bottom, 0px));
  border-top: 1px solid var(--line); background: var(--panel);
}
.field { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 4px; }
textarea {
  width: 100%; resize: none; font: inherit; color: var(--text); background: var(--bg);
  border: 1px solid var(--field); border-radius: var(--radius); padding: 10px 12px;
  min-height: var(--tap); max-height: min(200px, 30dvh); overflow-y: auto;
  field-sizing: content; /* auto-altura nativa; app.js usa CSSOM como fallback (compatível com CSP sem 'unsafe-inline') */
}
textarea::placeholder { color: var(--muted); opacity: 1; }
.input-hint { font-size: .8rem; color: var(--muted); display: flex; flex-wrap: wrap; justify-content: space-between; gap: 4px 12px; }
#input-count:empty { display: none; }

/* ---------- botões ---------- */
.btn {
  font: inherit; line-height: 1.25; min-height: var(--tap); min-width: var(--tap);
  border-radius: var(--radius); padding: 10px 18px; border: 1px solid var(--field);
  background: var(--panel); color: var(--text); cursor: pointer; text-align: center;
  display: inline-flex; align-items: center; justify-content: center; text-decoration: none;
}
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); font-weight: 600; }
.btn.ghost { background: transparent; }
.btn.danger { background: var(--err); border-color: var(--err); color: var(--err-text-on); font-weight: 600; }
.btn.small { padding: 8px 14px; font-size: .92rem; }
.btn:hover:not([aria-disabled="true"]) { filter: brightness(1.08); }
.btn[aria-disabled="true"], .btn:disabled { opacity: .55; cursor: not-allowed; }

/* ---------- Ficha ---------- */
.ficha { margin: 0 var(--pad-x) 12px; padding: 16px; border: 1px solid var(--field); border-radius: 12px; background: var(--panel); max-height: 40dvh; overflow: auto; }
.ficha-head { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.ficha h2 { font-size: 1.05rem; }
.ficha h3 { font-size: .95rem; margin-top: 10px; }
.ficha .row { display: flex; gap: 8px; flex-wrap: wrap; margin: 10px 0; }
.ficha ul { margin: 4px 0 8px; padding-left: 20px; }

/* ---------- diálogo ---------- */
dialog { border: 1px solid var(--field); border-radius: 14px; background: var(--panel); color: var(--text); padding: 20px; width: min(480px, calc(100vw - 32px)); }
dialog::backdrop { background: rgb(0 0 0 / .55); }
dialog h2 { font-size: 1.1rem; margin-bottom: 10px; }
dialog p { margin-bottom: 10px; }
dialog .row { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px; margin-top: 6px; }

/* ---------- celular ---------- */
@media (max-width: 760px) {
  .app { grid-template-columns: minmax(0, 1fr); grid-template-rows: auto minmax(0, 1fr); }
  .side { border-right: 0; border-bottom: 1px solid var(--line); padding: 12px 16px; gap: 8px; overflow: visible; }
  .side h1 { font-size: 1rem; }
  .side > .hint { display: none; }
  .progress-title { margin-bottom: 4px; font-size: .85rem; }
  .steps { display: flex; flex-wrap: wrap; gap: 4px; }
  .steps li { padding: 2px 6px; }
  /* só a etapa atual mostra o nome; as demais ficam disponíveis ao leitor de tela */
  .steps li:not(.now) .lbl {
    position: absolute; width: 1px; height: 1px; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap;
  }
  .side-actions { margin-top: 0; grid-template-columns: 1fr 1fr; }
  .msg { max-width: 94%; }
  .composer { gap: 8px; }
  .composer .btn { padding: 10px 14px; }
}
/* telas baixas (celular deitado + teclado): a página rola e o campo fica preso embaixo */
@media (max-height: 500px) {
  .app { height: auto; min-height: 100dvh; }
  .log { min-height: 60dvh; }
  .composer { position: sticky; bottom: 0; z-index: 2; }
  .ficha { max-height: none; }
}

@media (prefers-reduced-motion: reduce) {
  .msg.pending .body::after { animation: none; }
  .log { scroll-behavior: auto; }
}
@media (forced-colors: active) {
  .msg, .banner, .ficha { border: 1px solid CanvasText; }
  .steps li.now { outline: 2px solid Highlight; }
  .btn[aria-disabled="true"] { color: GrayText; border-color: GrayText; }
}

/* ---------- v3: navegação, limites e aviso de privacidade do chat ---------- */
.topnav { display: flex; flex-wrap: wrap; gap: 8px; }
.topnav .btn { flex: 1 1 auto; }
.limites { font-size: .85rem; margin-top: 6px; }
.limites:empty { display: none; }
.aviso-privacidade { font-size: .82rem; color: var(--muted); border-left: 3px solid var(--field); padding-left: 8px; }
.aviso-privacidade:empty { display: none; }

/* ---------- v3: páginas de login, confirmação, consentimento e legais ---------- */
.page { min-height: 100vh; min-height: 100dvh; display: grid; place-items: start center; padding: 24px var(--pad-x); }
.card { width: min(480px, 100%); background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 24px 20px; display: grid; gap: 14px; }
.card.wide { width: min(720px, 100%); }
.card h1 { font-size: 1.3rem; line-height: 1.3; }
.card h2 { font-size: 1.05rem; }
.card ul, .card ol { margin: 0; padding-left: 22px; display: grid; gap: 6px; }
.stack { display: grid; gap: 6px; }
.label { font-weight: 600; }
.input {
  width: 100%; font: inherit; color: var(--text); background: var(--bg);
  border: 1px solid var(--field); border-radius: var(--radius); padding: 10px 12px; min-height: var(--tap);
}
.input.code { font-size: 1.4rem; letter-spacing: .35em; text-align: center; font-variant-numeric: tabular-nums; }
.input[aria-invalid="true"] { border-color: var(--err); border-width: 2px; }
.help { font-size: .88rem; color: var(--muted); }
.alert { padding: 10px 14px; border-radius: var(--radius); background: var(--err-bg); border: 1px solid var(--err); color: var(--text); }
.alert::before { content: "Erro: "; font-weight: 700; color: var(--err); }
.status-box { padding: 10px 14px; border-radius: var(--radius); background: var(--bot); border: 1px solid var(--line); }
.status-box:empty, .alert:empty { display: none; }
.warn { padding: 10px 14px; border-radius: var(--radius); background: var(--warn-bg); color: var(--warn-text); border: 1px solid currentColor; }
.pendente-tag { display: inline-block; font-size: .78rem; font-weight: 700; padding: 1px 8px; border-radius: 999px; background: var(--warn-bg); color: var(--warn-text); border: 1px solid currentColor; }
.check { display: flex; gap: 12px; align-items: flex-start; min-height: var(--tap); padding: 6px 0; }
.check input { width: 24px; height: 24px; margin-top: 2px; flex: none; accent-color: var(--accent); }
.links { display: grid; gap: 4px; }
a { color: var(--accent); }
.btn[href] { color: var(--text); }
.btn.primary[href] { color: var(--accent-text); }
.legal-body { display: grid; gap: 12px; }
@media (max-width: 760px) {
  .topnav { gap: 6px; }
  .topnav .btn { padding: 6px 10px; min-height: var(--tap); }
  /* ganha altura para a conversa em telas pequenas: o título "Etapas" fica só para leitor de tela */
  .progress-title { position: absolute; width: 1px; height: 1px; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap; }
  .limites { margin-top: 2px; font-size: .8rem; }
  .aviso-privacidade { font-size: .78rem; line-height: 1.35; }
  .composer { padding-top: 8px; }
}
@media (forced-colors: active) {
  .alert, .status-box, .warn, .card { border: 1px solid CanvasText; }
}