/* Nous — design editorial, minimalista e sofisticado.
   Paleta: papel quente, tinta, pinho profundo, latão. Sem gradientes de IA. */
:root{
  --paper:#F7F5F0;
  --paper-2:#FFFFFF;
  --ink:#16181D;
  --muted:#6E6E6A;
  --line:#E7E2D9;
  --line-soft:#EFECE5;
  --pine:#17332F;
  --pine-ink:#0F2421;
  --brass:#B9975B;
  --brass-soft:#EDE3CC;
  --danger:#9B2C2C;
  --radius:14px;
  --shadow:0 12px 32px rgba(22,24,29,.08);
  --font-ui:'Inter',system-ui,-apple-system,'Segoe UI',sans-serif;
  --font-serif:'Fraunces',Georgia,serif;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:var(--font-ui);
  background:var(--paper);
  color:var(--ink);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
::selection{background:var(--brass-soft)}

.app-shell{
  display:grid;
  grid-template-columns:320px 1fr;
  height:100dvh;
  max-width:1440px;
  margin:0 auto;
  background:var(--paper);
}

/* ---------- Sidebar ---------- */
.sidebar{
  display:flex;flex-direction:column;
  background:var(--paper-2);
  border-right:1px solid var(--line);
  padding:20px 16px 14px;
  min-height:0;
  z-index:30;
}
.brand{display:flex;align-items:center;gap:12px;padding:2px 6px 16px}
.brand-mark{
  width:40px;height:40px;border-radius:11px;
  background:var(--pine);color:var(--paper);
  display:grid;place-items:center;
  font-family:var(--font-serif);font-size:24px;font-weight:600;
  letter-spacing:.02em;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.12);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-family:var(--font-serif);font-size:19px;font-weight:600;letter-spacing:-.01em}
.brand-text span{font-size:12px;color:var(--muted)}
.sidebar-close{display:none;margin-left:auto}

.btn-primary{
  appearance:none;border:0;cursor:pointer;
  background:var(--pine);color:#FBFAF7;
  border-radius:11px;padding:12px 14px;
  font:600 14px/1 var(--font-ui);
  display:flex;align-items:center;justify-content:center;gap:9px;
  transition:transform .18s ease, background .18s ease, box-shadow .18s ease;
  box-shadow:0 6px 16px rgba(23,51,47,.18);
}
.btn-primary:hover{background:var(--pine-ink);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0) scale(.99)}
.btn-plus{
  width:20px;height:20px;border-radius:50%;
  background:rgba(255,255,255,.16);
  display:grid;place-items:center;font-size:15px;line-height:1;
}
.btn-ghost{
  appearance:none;cursor:pointer;
  background:transparent;border:1px solid var(--line);border-radius:10px;
  padding:10px 16px;font:500 14px var(--font-ui);color:var(--ink);
  transition:border-color .15s, background .15s;
}
.btn-ghost:hover{border-color:var(--ink);background:#fff}

.search-wrap{
  display:flex;align-items:center;gap:8px;
  border:1px solid var(--line);border-radius:10px;
  padding:9px 11px;margin:14px 0 10px;background:#FCFBF8;
  transition:border-color .15s, box-shadow .15s;
}
.search-wrap:focus-within{border-color:var(--pine);box-shadow:0 0 0 3px rgba(23,51,47,.08)}
.search-wrap svg{color:var(--muted);flex:none}
.search-wrap input{border:0;outline:0;background:transparent;width:100%;font:400 13.5px var(--font-ui);color:var(--ink)}

.convo-list{
  flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:6px;
  padding:4px 2px 8px;min-height:0;
  scrollbar-width:thin;
}
.convo-item{
  text-align:left;cursor:pointer;width:100%;
  border:1px solid transparent;background:transparent;border-radius:11px;
  padding:11px 12px;
  display:flex;flex-direction:column;gap:3px;
  transition:background .15s, border-color .15s, transform .15s;
  animation:itemIn .28s ease both;
}
@keyframes itemIn{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:none}}
.convo-item:hover{background:#F4F1EA;border-color:var(--line-soft)}
.convo-item.active{background:#EFEAE0;border-color:var(--line)}
.convo-item strong{
  font-size:13.5px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.convo-item small{font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.convo-empty{padding:22px 10px;text-align:center;color:var(--muted);font-size:13px}

.sidebar-footer{border-top:1px solid var(--line);padding-top:12px;display:flex;flex-direction:column;gap:8px}
.status-row{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--muted)}
.status-dot{width:8px;height:8px;border-radius:50%;background:#C9C4B8;flex:none}
.status-dot.ok{background:#2F7D4F;animation:pulse 2.2s infinite}
.status-dot.warn{background:var(--brass);animation:pulse 2.2s infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(47,125,79,.35)}50%{box-shadow:0 0 0 6px rgba(47,125,79,0)}}
.footer-actions{display:flex;gap:4px}
.link-btn{
  background:none;border:0;cursor:pointer;color:var(--pine);
  font:600 12.5px var(--font-ui);padding:6px 8px;border-radius:7px;
}
.link-btn:hover{background:#EFEAE0;text-decoration:underline;text-underline-offset:3px}
.footnote{margin:0;font-size:11px;color:#A6A29A;letter-spacing:.04em}

/* ---------- Main ---------- */
.main{display:flex;flex-direction:column;min-width:0;min-height:0;background:var(--paper)}
.topbar{
  display:flex;align-items:center;gap:14px;
  padding:18px 28px 14px;border-bottom:1px solid var(--line);
  background:color-mix(in srgb, var(--paper) 88%, white);
  backdrop-filter:blur(8px);
  position:sticky;top:0;z-index:10;
}
.menu-btn{display:none}
.icon-btn{
  appearance:none;cursor:pointer;
  width:34px;height:34px;border-radius:9px;
  border:1px solid var(--line);background:#fff;color:var(--ink);
  display:grid;place-items:center;font-size:15px;
  transition:transform .15s, border-color .15s, background .15s;
}
.icon-btn:hover{border-color:var(--ink);transform:translateY(-1px)}
.icon-btn.danger:hover{border-color:var(--danger);color:var(--danger)}
.topbar-title{min-width:0;flex:1}
.topbar-title h1{
  margin:0;font-family:var(--font-serif);font-weight:600;letter-spacing:-.02em;
  font-size:22px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.topbar-title p{margin:2px 0 0;font-size:12.5px;color:var(--muted)}
.topbar-actions{display:flex;align-items:center;gap:8px}
.pill{
  font:600 11.5px var(--font-ui);letter-spacing:.03em;
  border:1px solid var(--line);background:#fff;color:var(--pine);
  padding:7px 11px;border-radius:999px;white-space:nowrap;
}

/* ---------- Timeline ---------- */
.timeline{
  flex:1;overflow-y:auto;padding:30px 28px 16px;scroll-behavior:smooth;
}
.timeline-inner{max-width:780px;margin:0 auto;display:flex;flex-direction:column;gap:18px}

.empty{max-width:620px;margin:6vh auto 0;text-align:center;animation:rise .5s ease both}
@keyframes rise{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
.eyebrow{
  display:inline-block;font:600 11px var(--font-ui);letter-spacing:.16em;text-transform:uppercase;
  color:var(--pine);border:1px solid var(--line);background:#fff;border-radius:999px;padding:7px 14px;
}
.empty h2{
  font-family:var(--font-serif);font-weight:500;letter-spacing:-.03em;
  font-size:clamp(38px,5.4vw,58px);line-height:1.02;margin:18px 0 10px;
}
.empty-sub{color:var(--muted);font-size:15px;line-height:1.6;margin:0 auto;max-width:46ch}
.suggestions{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:22px}
.chip{
  cursor:pointer;border:1px solid var(--line);background:#fff;border-radius:999px;
  padding:10px 15px;font:500 13px var(--font-ui);color:var(--ink);
  transition:all .16s ease;
}
.chip:hover{border-color:var(--pine);background:var(--pine);color:#fff;transform:translateY(-1px)}
.empty-meta{display:flex;align-items:center;gap:12px;justify-content:center;color:#B3AEA4;font-size:12px;margin-top:34px}
.empty-meta span{height:1px;width:70px;background:var(--line)}

/* Mensagens */
.msg{display:flex;gap:12px;max-width:780px;margin:0 auto 18px;animation:msgIn .32s cubic-bezier(.2,.7,.3,1) both}
@keyframes msgIn{from{opacity:0;transform:translateY(10px) scale(.995)}to{opacity:1;transform:none}}
.msg-avatar{
  width:32px;height:32px;border-radius:50%;flex:none;
  display:grid;place-items:center;font:600 13px var(--font-serif);
  margin-top:2px;
}
.msg.user{flex-direction:row-reverse}
.msg.user .msg-avatar{background:var(--ink);color:#fff}
.msg.assistant .msg-avatar{background:var(--pine);color:#F3EFE6;border:1px solid rgba(0,0,0,.06)}
.msg-body{
  max-width:min(68ch,100%);
  border-radius:var(--radius);
  padding:13px 16px;
  font-size:14.8px;line-height:1.65;
  box-shadow:0 1px 2px rgba(22,24,29,.05);
  overflow-wrap:anywhere;
}
.msg.user .msg-body{background:var(--pine);color:#F7F5F0;border-top-right-radius:5px}
.msg.assistant .msg-body{background:#FFFFFF;border:1px solid var(--line);border-top-left-radius:5px}
.msg-meta{font-size:11px;color:#A6A29A;margin-top:6px;letter-spacing:.02em}
.msg.user .msg-meta{text-align:right}
.msg-body p{margin:0 0 10px}.msg-body p:last-child{margin:0}
.msg-body pre{
  background:#111418;color:#EDE9DF;border-radius:10px;padding:12px 14px;overflow:auto;
  font-size:12.8px;line-height:1.55;margin:10px 0;
}
.msg-body code{font-family:ui-monospace,'SF Mono',Menlo,Consolas,monospace;font-size:.88em}
.msg-body p code{background:#F0EDE6;padding:2px 6px;border-radius:6px}
.msg.user .msg-body p code{background:rgba(255,255,255,.16)}
.msg-body ul,.msg-body ol{margin:8px 0;padding-left:20px}
.msg-body li{margin:4px 0}
.msg-body strong{font-weight:600}
.msg-actions{display:flex;gap:6px;margin-top:8px}
.mini-btn{
  cursor:pointer;border:1px solid var(--line);background:#fff;border-radius:7px;
  font:500 11.5px var(--font-ui);color:var(--muted);padding:5px 9px;
  transition:all .14s;
}
.mini-btn:hover{color:var(--ink);border-color:var(--ink)}

/* Digitando */
.typing-dots{display:inline-flex;gap:5px;padding:6px 2px}
.typing-dots i{width:7px;height:7px;border-radius:50%;background:#B9B4A8;animation:blink 1.1s infinite}
.typing-dots i:nth-child(2){animation-delay:.15s}.typing-dots i:nth-child(3){animation-delay:.3s}
@keyframes blink{0%,100%{opacity:.35;transform:none}50%{opacity:1;transform:translateY(-3px)}}
.caret{display:inline-block;width:8px;height:16px;background:var(--brass);vertical-align:-2px;animation:caret .8s steps(1) infinite;border-radius:2px}
@keyframes caret{50%{opacity:0}}

/* ---------- Composer ---------- */
.composer-zone{padding:8px 28px 18px;background:linear-gradient(to top,var(--paper) 72%,transparent)}
.typing-hint{
  max-width:780px;margin:0 auto 8px;font-size:12.5px;color:var(--muted);
  display:flex;align-items:center;gap:8px;
}
.dots{display:inline-flex;gap:4px}.dots i{width:6px;height:6px;border-radius:50%;background:var(--brass);animation:blink 1s infinite}
.dots i:nth-child(2){animation-delay:.15s}.dots i:nth-child(3){animation-delay:.3s}
.composer{
  max-width:780px;margin:0 auto;
  display:flex;align-items:flex-end;gap:10px;
  background:#fff;border:1px solid var(--line);border-radius:16px;
  padding:10px 10px 10px 18px;
  box-shadow:var(--shadow);
  transition:border-color .15s, box-shadow .15s;
}
.composer:focus-within{border-color:var(--pine);box-shadow:0 0 0 3px rgba(23,51,47,.09),var(--shadow)}
.composer textarea{
  flex:1;border:0;outline:0;resize:none;background:transparent;
  font:400 15px/1.55 var(--font-ui);color:var(--ink);
  max-height:160px;padding:8px 0;
}
.composer textarea::placeholder{color:#A6A29A}
.send-btn{
  cursor:pointer;border:0;flex:none;
  width:42px;height:42px;border-radius:12px;
  background:var(--pine);color:#fff;display:grid;place-items:center;
  transition:transform .16s, background .16s, opacity .16s;
}
.send-btn:hover:not(:disabled){background:var(--pine-ink);transform:translateY(-1px)}
.send-btn:disabled{opacity:.4;cursor:not-allowed}
.send-btn.sending{animation:sendPulse 1s infinite}
@keyframes sendPulse{50%{transform:scale(.94)}}
.composer-note{max-width:780px;margin:9px auto 0;font-size:11.5px;color:#A6A29A;text-align:center}

/* ---------- Modal / toast ---------- */
.modal-root{
  position:fixed;inset:0;z-index:60;
  background:rgba(22,24,29,.44);
  display:grid;place-items:center;padding:20px;
  animation:fade .2s ease;
}
@keyframes fade{from{opacity:0}}
.modal-root[hidden]{display:none}
.modal-card{
  width:min(520px,100%);background:#fff;border-radius:18px;padding:24px;
  box-shadow:0 24px 64px rgba(0,0,0,.22);
  animation:pop .24s cubic-bezier(.2,.8,.3,1.1);
  max-height:90dvh;overflow:auto;
}
@keyframes pop{from{opacity:0;transform:translateY(10px) scale(.98)}}
.modal-head{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:14px}
.modal-head h3{margin:0;font-family:var(--font-serif);font-size:22px}
.modal-head p{margin:4px 0 0;color:var(--muted);font-size:13px}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:12px}
.field span{font:600 12.5px var(--font-ui)}
.field span em{font-weight:400;color:var(--muted)}
.field input,.field select{
  border:1px solid var(--line);border-radius:10px;padding:11px 12px;
  font:400 13.5px var(--font-ui);outline:0;background:#FCFBF8;width:100%;
}
.field input:focus,.field select:focus{border-color:var(--pine);box-shadow:0 0 0 3px rgba(23,51,47,.08)}
.field small{color:var(--muted);font-size:12px}
.field code{background:#F0EDE6;padding:1px 5px;border-radius:5px}
.modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:6px}
.modal-note{font-size:12px;color:var(--muted);line-height:1.6;border-top:1px solid var(--line-soft);padding-top:12px}

.toast{
  position:fixed;left:50%;bottom:26px;transform:translateX(-50%) translateY(12px);
  background:var(--ink);color:#fff;font:500 13px var(--font-ui);
  padding:11px 18px;border-radius:999px;opacity:0;pointer-events:none;
  transition:all .25s ease;z-index:80;max-width:90vw;text-align:center;
}
.toast.show{opacity:1;transform:translateX(-50%)}

.scrim{display:none}

/* ---------- Responsivo ---------- */
@media (max-width:900px){
  .app-shell{grid-template-columns:1fr}
  .sidebar{
    position:fixed;top:0;left:0;bottom:0;width:min(320px,86vw);
    transform:translateX(-102%);transition:transform .28s cubic-bezier(.2,.7,.3,1);
    box-shadow:0 0 60px rgba(0,0,0,.18);
  }
  body.menu-open .sidebar{transform:none}
  .sidebar-close{display:grid}
  .scrim{display:block;position:fixed;inset:0;background:rgba(22,24,29,.4);z-index:20;
    opacity:0;pointer-events:none;transition:opacity .25s}
  body.menu-open .scrim{opacity:1;pointer-events:auto}
  .menu-btn{display:grid}
  .topbar,.timeline,.composer-zone{padding-left:16px;padding-right:16px}
  .pill{display:none}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;transition-duration:.01ms !important}
}