:root {
  --bg: #faf9f5;
  --sidebar: #f3f1ea;
  --surface: #ffffff;
  --text: #29261b;
  --muted: #6f6b5e;
  --border: #e5e2d8;
  --accent: #c96442;
  --accent-hover: #b4553a;
  --user-bubble: #f0eee6;
  --chip: #f5f4ef;
  --ok: #2f7d4f;
  --danger: #b3261e;
  --warn-bg: #fdf6ec;
  --warn-border: #e8c48f;
  --code-bg: #f5f4ef;
  --serif: "Tiempos Text", ui-serif, Georgia, Cambria, "Times New Roman", serif;
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "Cascadia Code", Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #262624;
    --sidebar: #1f1e1d;
    --surface: #30302e;
    --text: #ece9e1;
    --muted: #a6a39a;
    --border: #3e3d39;
    --user-bubble: #141413;
    --chip: #30302e;
    --warn-bg: #3a3122;
    --warn-border: #7a5c2e;
    --code-bg: #1f1e1d;
    --ok: #6cc28f;
    --danger: #f2a39c;
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.55 var(--sans); }
[hidden] { display: none !important; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
.muted { color: var(--muted); }
.erro { color: var(--danger); margin: 0; }

/* Login */
.login { min-height: 100%; display: grid; place-items: center; padding: 16px; }
.login-card { width: 100%; max-width: 380px; display: flex; flex-direction: column; gap: 14px; background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 32px 28px; }
.login-card h1 { font: 500 26px/1.2 var(--serif); margin: 0; }
.login-card p { margin: 0; }
.login-card label { display: flex; flex-direction: column; gap: 6px; font-size: 14px; color: var(--muted); }
.login-card input { padding: 10px 12px; border: 1px solid var(--border); border-radius: 10px; background: var(--bg); color: var(--text); }
.login-card input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.btn-primary { background: var(--accent); color: #fff; border: 0; border-radius: 10px; padding: 11px; font-weight: 600; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-primary:disabled { opacity: .6; cursor: wait; }

/* Layout */
.app { display: flex; height: 100%; }
.sidebar { width: 272px; flex-shrink: 0; background: var(--sidebar); border-right: 1px solid var(--border); display: flex; flex-direction: column; padding: 12px; gap: 6px; }
.sidebar-top { display: flex; align-items: center; justify-content: space-between; padding: 4px 6px 10px; }
.brand { display: flex; align-items: center; gap: 8px; font: 600 17px var(--serif); }
.nova { text-align: left; background: transparent; border: 0; border-radius: 10px; padding: 9px 10px; color: var(--accent); font-weight: 600; }
.nova:hover { background: var(--border); }
.sidebar-label { font-size: 12px; color: var(--muted); padding: 12px 10px 4px; }
.lista { flex: 1; overflow-y: auto; display: flex; flex-direction: column; gap: 1px; }
.conv { display: flex; align-items: center; border-radius: 8px; }
.conv a { flex: 1; min-width: 0; padding: 7px 10px; color: var(--text); text-decoration: none; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; font-size: 14px; }
.conv:hover, .conv.ativa { background: var(--border); }
.conv .del { visibility: hidden; border: 0; background: none; color: var(--muted); padding: 4px 8px; }
.conv:hover .del { visibility: visible; }
.sidebar-bottom { border-top: 1px solid var(--border); padding-top: 10px; display: flex; flex-direction: column; gap: 8px; }
.user { display: flex; align-items: center; gap: 8px; padding: 0 6px; }
.avatar { width: 30px; height: 30px; border-radius: 50%; background: var(--text); color: var(--bg); display: grid; place-items: center; font-size: 13px; font-weight: 600; flex-shrink: 0; }
.user-nome { flex: 1; min-width: 0; font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.link-btn { background: none; border: 0; color: var(--muted); font-size: 13px; padding: 4px 6px; text-align: left; }
.link-btn:hover { color: var(--text); }
.icon-btn { background: none; border: 0; border-radius: 8px; padding: 6px 8px; color: var(--muted); display: inline-grid; place-items: center; cursor: pointer; }
.icon-btn:hover { background: var(--border); color: var(--text); }
.only-mobile { display: none; }

.main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.topbar { height: 52px; display: flex; align-items: center; gap: 10px; padding: 0 16px; flex-shrink: 0; }
.titulo { font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.badge { font-size: 11px; padding: 2px 8px; border: 1px solid var(--border); border-radius: 999px; color: var(--muted); font-family: var(--mono); }
.scroll { flex: 1; overflow-y: auto; padding: 8px 16px 24px; }
.mensagens { max-width: 760px; margin: 0 auto; display: flex; flex-direction: column; gap: 22px; }

.boas-vindas { max-width: 760px; margin: 14vh auto 0; text-align: center; }
.boas-vindas h2 { font: 400 36px/1.2 var(--serif); margin: 0 0 28px; }
.boas-vindas h2::before { content: "✻ "; color: var(--accent); }
.sugestoes { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.sugestoes button { border: 1px solid var(--border); background: var(--surface); border-radius: 10px; padding: 8px 14px; font-size: 14px; color: var(--muted); }
.sugestoes button:hover { color: var(--text); border-color: var(--muted); }
.app.vazio .boas-vindas { display: block; }
.app:not(.vazio) .boas-vindas { display: none; }

/* Mensagens */
.msg-user { align-self: flex-end; max-width: 85%; background: var(--user-bubble); border-radius: 16px; padding: 10px 16px; white-space: pre-wrap; overflow-wrap: anywhere; }
.msg-user .anexo-info { display: block; font-size: 12px; color: var(--muted); margin-top: 4px; }
.msg-ai { font: 16px/1.65 var(--serif); overflow-wrap: anywhere; }
.msg-ai > * + * { margin-top: 10px; }
.md p, .md ul, .md ol, .md pre, .md table, .md blockquote, .md h1, .md h2, .md h3 { margin: 0 0 12px; }
.md > :last-child { margin-bottom: 0; }
.md h1, .md h2, .md h3 { font-family: var(--serif); font-weight: 600; line-height: 1.3; }
.md h1 { font-size: 22px; } .md h2 { font-size: 19px; } .md h3 { font-size: 17px; }
.md code { font: 13px var(--mono); background: var(--code-bg); border: 1px solid var(--border); border-radius: 5px; padding: 1px 5px; }
.md pre { background: var(--code-bg); border: 1px solid var(--border); border-radius: 10px; padding: 12px 14px; overflow-x: auto; }
.md pre code { border: 0; padding: 0; background: none; }
.md table { border-collapse: collapse; display: block; overflow-x: auto; font: 14px/1.4 var(--sans); }
.md th, .md td { border: 1px solid var(--border); padding: 6px 10px; text-align: left; }
.md th { background: var(--chip); }
.md blockquote { border-left: 3px solid var(--border); padding-left: 12px; color: var(--muted); }
.md a { color: var(--accent); }
.cursor::after { content: "▍"; color: var(--accent); animation: pisca 1s steps(2) infinite; }
@keyframes pisca { 50% { opacity: 0; } }
.pensando { color: var(--muted); font: 14px var(--sans); display: flex; align-items: center; gap: 8px; }
.pensando::before { content: "✻"; color: var(--accent); animation: gira 2.4s linear infinite; display: inline-block; }
@keyframes gira { to { transform: rotate(360deg); } }

/* Ferramentas */
.tool { font: 13px/1.4 var(--sans); border: 1px solid var(--border); border-radius: 10px; background: var(--surface); }
.tool summary { list-style: none; cursor: pointer; padding: 7px 12px; display: flex; gap: 8px; align-items: center; color: var(--muted); }
.tool summary::-webkit-details-marker { display: none; }
.tool summary .tool-desc { flex: 1; min-width: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; font-family: var(--mono); font-size: 12px; }
.tool .st { flex-shrink: 0; }
.tool .st.ok { color: var(--ok); } .tool .st.err { color: var(--danger); }
.tool pre { margin: 0; padding: 10px 12px; border-top: 1px solid var(--border); font: 12px/1.45 var(--mono); white-space: pre-wrap; overflow-wrap: anywhere; max-height: 320px; overflow-y: auto; }

/* Aprovação */
.aprovacao { font: 14px/1.5 var(--sans); border: 1px solid var(--warn-border); background: var(--warn-bg); border-radius: 12px; padding: 14px 16px; display: flex; flex-direction: column; gap: 10px; }
.aprovacao-head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; font-weight: 600; }
.metodo { font: 600 11px var(--mono); padding: 2px 7px; border-radius: 6px; background: var(--accent); color: #fff; }
.aprovacao .caminho { font: 13px var(--mono); overflow-wrap: anywhere; }
.aprovacao pre { margin: 0; background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 10px; font: 12px/1.45 var(--mono); max-height: 300px; overflow: auto; white-space: pre-wrap; overflow-wrap: anywhere; }
.aprovacao-acoes { display: flex; gap: 8px; }
.aprovacao-acoes button { border-radius: 8px; padding: 7px 16px; font-weight: 600; border: 1px solid var(--border); background: var(--surface); }
.aprovacao-acoes .aprovar { background: var(--ok); border-color: var(--ok); color: #fff; }
.aprovacao .decisao { font-weight: 600; }
.aprovacao .decisao.aprovado { color: var(--ok); } .aprovacao .decisao.recusado { color: var(--danger); }
.msg-erro { color: var(--danger); font: 14px var(--sans); border: 1px solid var(--danger); border-radius: 10px; padding: 8px 12px; }

/* Composer */
.composer { max-width: 760px; width: calc(100% - 32px); margin: 0 auto; background: var(--surface); border: 1px solid var(--border); border-radius: 18px; padding: 12px 12px 8px 16px; box-shadow: 0 4px 20px rgb(0 0 0 / 4%); display: flex; flex-direction: column; gap: 6px; }
.composer:focus-within { border-color: var(--muted); }
.app.vazio .composer { margin-top: 0; }
.composer textarea { border: 0; outline: 0; resize: none; background: transparent; max-height: 240px; min-height: 26px; line-height: 1.5; padding: 2px 0; }
.composer-bar { display: flex; align-items: center; gap: 6px; }
.composer select { border: 1px solid var(--border); background: var(--bg); border-radius: 8px; padding: 4px 8px; font: 12px var(--mono); color: var(--muted); }
.spacer { flex: 1; }
.send { width: 34px; height: 34px; border-radius: 10px; border: 0; background: var(--accent); color: #fff; font-size: 17px; font-weight: 700; }
.send:disabled { opacity: .4; cursor: default; }
.send.stop { background: var(--text); color: var(--bg); font-size: 12px; }
.anexos { display: flex; flex-wrap: wrap; gap: 6px; }
.anexos:empty { display: none; }
.anexo { display: flex; align-items: center; gap: 6px; border: 1px solid var(--border); border-radius: 8px; padding: 4px 6px 4px 4px; font-size: 12px; background: var(--bg); max-width: 220px; }
.anexo img { width: 36px; height: 36px; object-fit: cover; border-radius: 5px; }
.anexo span { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.anexo button { border: 0; background: none; color: var(--muted); padding: 0 2px; }
.rodape { text-align: center; font-size: 12px; margin: 8px 16px 12px; }

/* Auditoria */
.dialog { width: min(820px, calc(100% - 32px)); max-height: 80vh; border: 1px solid var(--border); border-radius: 14px; background: var(--surface); color: var(--text); padding: 0; }
.dialog::backdrop { background: rgb(0 0 0 / 35%); }
.dialog-head { display: flex; justify-content: space-between; align-items: center; padding: 12px 16px; border-bottom: 1px solid var(--border); position: sticky; top: 0; background: var(--surface); }
.dialog-head h3 { margin: 0; font: 600 17px var(--serif); }
.auditoria-lista { padding: 8px 16px 16px; display: flex; flex-direction: column; gap: 8px; font-size: 13px; }
.aud { border: 1px solid var(--border); border-radius: 10px; padding: 8px 12px; }
.aud .aud-top { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.aud .caminho { font-family: var(--mono); overflow-wrap: anywhere; }

@media (max-width: 800px) {
  .only-mobile { display: inline-grid; }
  .sidebar { position: fixed; inset: 0 auto 0 0; z-index: 10; transform: translateX(-100%); transition: transform .2s; box-shadow: 0 0 40px rgb(0 0 0 / 20%); }
  .sidebar.aberta { transform: none; }
  .boas-vindas { margin-top: 8vh; }
  .boas-vindas h2 { font-size: 28px; }
  .msg-user { max-width: 92%; }
}