/* ============================================================
   LATAM PCI — Design System
   Paleta: Vermelho fogo #E8441A + Escuro técnico #0D0F14
   ============================================================ */
:root {
  --red:       #E8441A;
  --red-dark:  #8C1A00;
  --red-glow:  rgba(232,68,26,.15);
  --bg:        #0D0F14;
  --bg2:       #13161F;
  --bg3:       #1A1E2B;
  --bg4:       #222840;
  --border:    rgba(255,255,255,.07);
  --border2:   rgba(255,255,255,.12);
  --text:      #EDF0FA;
  --text2:     #8B93B0;
  --text3:     #4A5070;
  --sidebar-w: 252px;
  --r:         10px;
  --r-sm:      7px;
  --ease:      .18s ease;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:15px}
body{font-family:'Inter',system-ui,sans-serif;background:var(--bg);color:var(--text);
     display:flex;height:100dvh;overflow:hidden}
::-webkit-scrollbar{width:4px}
::-webkit-scrollbar-thumb{background:var(--bg4);border-radius:2px}

/* ── SIDEBAR ─────────────────────────────────────────────── */
.sidebar{
  width:var(--sidebar-w);min-width:var(--sidebar-w);
  background:var(--bg2);border-right:1px solid var(--border);
  display:flex;flex-direction:column;height:100dvh;
  transition:transform var(--ease);z-index:200;
}
.sidebar-top{padding:18px 14px 14px;border-bottom:1px solid var(--border);display:flex;flex-direction:column;gap:12px}
.brand{display:flex;align-items:center;gap:9px}
.brand-name{font-size:.88rem;font-weight:700;letter-spacing:.08em;
  background:linear-gradient(135deg,#E8441A,#FF7A50);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent}
.btn-new{
  display:flex;align-items:center;gap:7px;
  background:var(--red);color:#fff;border:none;border-radius:var(--r-sm);
  padding:8px 13px;font-size:.82rem;font-weight:500;cursor:pointer;
  transition:background var(--ease),transform var(--ease);font-family:inherit}
.btn-new:hover{background:var(--red-dark);transform:translateY(-1px)}

.sidebar-section-label{font-size:.68rem;font-weight:600;color:var(--text3);
  letter-spacing:.1em;padding:14px 16px 6px}
.conv-list{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:2px;padding:0 8px}
.conv-item{
  display:flex;align-items:center;gap:8px;padding:8px 10px;
  border-radius:var(--r-sm);cursor:pointer;color:var(--text2);
  font-size:.8rem;line-height:1.3;transition:background var(--ease),color var(--ease)}
.conv-item:hover{background:var(--bg3);color:var(--text)}
.conv-item.active{background:var(--red-glow);color:var(--text);border-left:2px solid var(--red)}
.conv-item-title{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.conv-del{
  opacity:0;background:none;border:none;color:var(--text3);cursor:pointer;
  font-size:.7rem;padding:2px 5px;border-radius:4px;transition:opacity var(--ease),color var(--ease)}
.conv-item:hover .conv-del{opacity:1}
.conv-del:hover{color:var(--red)}

.sidebar-footer{padding:10px 8px;border-top:1px solid var(--border);display:flex;flex-direction:column;gap:2px}
.sidebar-link{
  display:flex;align-items:center;gap:9px;padding:8px 10px;
  border-radius:var(--r-sm);color:var(--text2);font-size:.8rem;
  text-decoration:none;transition:background var(--ease),color var(--ease)}
.sidebar-link:hover{background:var(--bg3);color:var(--text)}

/* ── MAIN ────────────────────────────────────────────────── */
.main{flex:1;display:flex;flex-direction:column;min-width:0;height:100dvh}

.topbar{
  display:flex;align-items:center;gap:12px;
  padding:13px 18px;border-bottom:1px solid var(--border);background:var(--bg)}
.btn-icon{display:none;background:none;border:none;color:var(--text2);cursor:pointer;
  padding:4px;border-radius:6px}
.btn-icon:hover{background:var(--bg3)}
.topbar-title{flex:1;font-size:.87rem;color:var(--text2);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

.mode-toggle{display:flex;background:var(--bg3);border:1px solid var(--border);
  border-radius:8px;padding:3px;gap:2px}
.mode-btn{
  display:flex;align-items:center;gap:5px;padding:5px 11px;
  border-radius:6px;border:none;background:transparent;color:var(--text2);
  font-size:.75rem;font-weight:500;cursor:pointer;
  transition:all var(--ease);font-family:inherit}
.mode-btn.active{background:var(--red);color:#fff;box-shadow:0 2px 8px rgba(232,68,26,.35)}
.mode-btn:not(.active):hover{color:var(--text);background:var(--bg4)}

/* ── CHAT AREA ───────────────────────────────────────────── */
.chat-area{flex:1;overflow-y:auto;position:relative}

/* Empty */
.empty{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  height:100%;padding:40px 24px;text-align:center;animation:fadeUp .45s ease}
.empty-icon{margin-bottom:18px;filter:drop-shadow(0 4px 20px rgba(232,68,26,.4));
  animation:float 4s ease-in-out infinite}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
.empty-title{font-size:1.7rem;font-weight:700;margin-bottom:9px;
  background:linear-gradient(135deg,#E8441A,#FF7A50,#FFB088);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent}
.empty-sub{color:var(--text2);font-size:.85rem;line-height:1.65;max-width:480px;margin-bottom:30px}
.chips{display:grid;grid-template-columns:1fr 1fr;gap:9px;max-width:640px;width:100%}
.chip{
  background:var(--bg2);border:1px solid var(--border2);border-radius:var(--r);
  padding:13px 15px;color:var(--text2);font-size:.79rem;font-family:inherit;
  cursor:pointer;text-align:left;transition:all var(--ease);line-height:1.4}
.chip:hover{background:var(--bg3);border-color:var(--red);color:var(--text);
  transform:translateY(-2px);box-shadow:0 4px 16px rgba(232,68,26,.2)}

/* Messages */
.messages{
  display:flex;flex-direction:column;max-width:800px;
  margin:0 auto;padding:22px 18px;width:100%;gap:0}

.msg{display:flex;gap:13px;padding:16px 0;border-bottom:1px solid var(--border);
  animation:fadeUp .25s ease}
.msg:last-child{border-bottom:none}
@keyframes fadeUp{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}

.avatar{width:32px;height:32px;border-radius:7px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;font-size:.72rem;font-weight:700}
.avatar.user{background:var(--bg4);color:var(--text2)}
.avatar.bot{background:linear-gradient(135deg,#E8441A,#8C1A00);color:#fff}

.msg-body{flex:1;min-width:0}
.msg-role{font-size:.68rem;font-weight:600;color:var(--text3);
  text-transform:uppercase;letter-spacing:.07em;margin-bottom:5px}
.msg-role.bot{color:var(--red)}
.msg-content{font-size:.88rem;line-height:1.72;color:var(--text);white-space:pre-wrap}
.msg-content strong{color:var(--text);font-weight:600}
.msg-content em{font-style:italic;color:#c8cfe0}
.msg-content code{font-family:'JetBrains Mono',monospace;font-size:.8em;
  background:var(--bg3);border-radius:4px;padding:1px 5px;color:#FF7A50}
.msg-content .citation{
  display:inline;font-size:.82rem;color:#FF7A50;font-style:italic;
  background:rgba(232,68,26,.08);padding:1px 4px;border-radius:3px}
.msg-content .list-item{
  padding-left:1.4em;position:relative;margin:2px 0}
.msg-content .list-item .list-num{
  position:absolute;left:0;color:var(--text3);font-weight:500}
.msg-content .list-item.list-bullet{
  padding-left:1.2em}

.mode-tag{display:inline-flex;align-items:center;gap:4px;font-size:.65rem;
  font-weight:600;padding:2px 7px;border-radius:4px;margin-bottom:5px;letter-spacing:.05em}
.mode-tag.fast{background:rgba(34,197,94,.12);color:#22C55E}
.mode-tag.deep{background:rgba(139,92,246,.12);color:#A78BFA}

/* Thinking */
.thinking{display:flex;align-items:center;gap:8px;color:var(--text3);
  font-size:.8rem;font-style:italic}
.dots span{display:inline-block;width:5px;height:5px;background:var(--red);
  border-radius:50%;animation:blink 1.4s infinite}
.dots span:nth-child(2){animation-delay:.2s}
.dots span:nth-child(3){animation-delay:.4s}
@keyframes blink{0%,80%,100%{opacity:.2}40%{opacity:1}}

/* Sources */
.sources{display:flex;flex-wrap:wrap;gap:6px;margin-top:14px}
.source-chip{
  display:inline-flex;align-items:center;gap:6px;background:var(--bg2);
  border:1px solid var(--border2);border-radius:6px;padding:5px 10px;
  font-size:.74rem;color:var(--text2);
  transition:all var(--ease);font-family:'Inter',system-ui,sans-serif}
.source-chip:hover{border-color:var(--red);background:var(--red-glow)}
.chip-book{color:#FF7A50;font-weight:500;font-style:italic}
.chip-pages{color:var(--text3);font-family:'JetBrains Mono',monospace;font-size:.7rem}
.source-chip:hover .chip-pages{color:var(--text2)}

/* Inline image preview */
.inline-fig{
  margin-top:12px;border-radius:var(--r);overflow:hidden;
  border:1px solid var(--border);cursor:pointer;max-width:380px;
  transition:border-color var(--ease),box-shadow var(--ease)}
.inline-fig:hover{border-color:var(--red);box-shadow:0 0 20px var(--red-glow)}
.inline-fig img{width:100%;display:block;max-height:240px;object-fit:cover}
.inline-fig-cap{padding:7px 11px;background:var(--bg3);
  font-size:.7rem;color:var(--text2);font-family:'Inter',system-ui,sans-serif}
.inline-fig-cap .chip-book{color:#FF7A50;font-weight:500;font-style:italic}

/* ── INPUT ───────────────────────────────────────────────── */
.input-bar{
  padding:14px 18px 18px;border-top:1px solid var(--border);
  background:var(--bg);max-width:840px;margin:0 auto;width:100%}
.input-wrap{
  display:flex;align-items:flex-end;gap:9px;background:var(--bg2);
  border:1px solid var(--border2);border-radius:var(--r);padding:11px 13px;
  transition:border-color var(--ease),box-shadow var(--ease)}
.input-wrap:focus-within{border-color:var(--red);box-shadow:0 0 0 3px var(--red-glow)}
.query-input{
  flex:1;background:none;border:none;outline:none;color:var(--text);
  font-size:.88rem;font-family:inherit;resize:none;line-height:1.6;
  max-height:160px;overflow-y:auto}
.query-input::placeholder{color:var(--text3)}
.send-btn{
  background:var(--red);border:none;border-radius:7px;width:36px;height:36px;
  display:flex;align-items:center;justify-content:center;cursor:pointer;
  color:#fff;flex-shrink:0;transition:background var(--ease),transform var(--ease),box-shadow var(--ease)}
.send-btn:hover{background:var(--red-dark);transform:scale(1.06);box-shadow:0 4px 14px rgba(232,68,26,.4)}
.send-btn:disabled{background:var(--bg4);cursor:not-allowed;transform:none;box-shadow:none}
.input-hint{font-size:.7rem;color:var(--text3);text-align:center;margin-top:7px}

/* ── MODAL ───────────────────────────────────────────────── */
.modal{display:none;position:fixed;inset:0;z-index:1000;
  align-items:center;justify-content:center}
.modal.open{display:flex}
.modal-bg{position:absolute;inset:0;background:rgba(0,0,0,.75);backdrop-filter:blur(4px)}
.modal-box{
  position:relative;z-index:1;background:var(--bg2);
  border:1px solid var(--border2);border-radius:var(--r);
  max-width:88vw;max-height:88vh;overflow-y:auto;
  box-shadow:0 8px 40px rgba(0,0,0,.5);animation:scaleIn .18s ease}
@keyframes scaleIn{from{transform:scale(.93);opacity:0}to{transform:scale(1);opacity:1}}
.modal-close{
  position:absolute;top:10px;right:10px;background:var(--bg4);border:none;
  border-radius:50%;width:30px;height:30px;color:var(--text2);cursor:pointer;
  font-size:.8rem;display:flex;align-items:center;justify-content:center;z-index:2;
  transition:background var(--ease)}
.modal-close:hover{background:var(--red);color:#fff}
.modal-img{max-width:80vw;max-height:65vh;display:block;border-radius:var(--r) var(--r) 0 0}
.modal-info{padding:14px 18px;font-size:.78rem;color:var(--text2);line-height:1.6;
  border-top:1px solid var(--border)}
.modal-info strong{color:var(--text);display:block;margin-bottom:4px;font-size:.82rem}
.modal-tags{display:flex;flex-wrap:wrap;gap:4px;margin-top:8px}
.modal-tag{background:var(--bg4);border-radius:4px;padding:2px 7px;
  font-size:.68rem;font-family:'JetBrains Mono',monospace;color:var(--text3)}

/* ── RESPONSIVE ──────────────────────────────────────────── */
@media(max-width:768px){
  .sidebar{position:fixed;left:0;top:0;transform:translateX(-100%)}
  .sidebar.open{transform:translateX(0);box-shadow:0 0 40px rgba(0,0,0,.5)}
  .btn-icon{display:flex}
  .chips{grid-template-columns:1fr}
  .empty-title{font-size:1.35rem}
}

/* ── PÁGINAS INTERNAS (Ajuda/Sobre) ──────────────────────── */
.page-content{max-width:720px;margin:0 auto;padding:48px 24px}
.page-content h1{font-size:1.6rem;font-weight:700;margin-bottom:8px;
  background:linear-gradient(135deg,#E8441A,#FF7A50);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent}
.page-content .subtitle{color:var(--text2);margin-bottom:36px;font-size:.9rem}
.page-content h2{font-size:1rem;font-weight:600;color:var(--text);
  margin:28px 0 10px;padding-left:12px;border-left:3px solid var(--red)}
.page-content p,.page-content li{color:var(--text2);font-size:.87rem;line-height:1.7}
.page-content ul{padding-left:20px;display:flex;flex-direction:column;gap:5px}
.page-content a{color:var(--red);text-decoration:none}
.page-content a:hover{text-decoration:underline}
.back-link{display:inline-flex;align-items:center;gap:6px;color:var(--text2);
  font-size:.82rem;text-decoration:none;margin-bottom:28px;
  transition:color var(--ease)}
.back-link:hover{color:var(--text)}
.corpus-table{width:100%;border-collapse:collapse;margin-top:12px;font-size:.78rem}
.corpus-table th{background:var(--bg3);color:var(--text2);font-weight:600;
  padding:8px 12px;text-align:left;border-bottom:1px solid var(--border)}
.corpus-table td{padding:7px 12px;border-bottom:1px solid var(--border);color:var(--text2)}
.corpus-table tr:hover td{background:var(--bg3)}
.lang-badge{display:inline-block;padding:1px 6px;border-radius:4px;font-size:.7rem;font-weight:600}
.lang-badge.pt{background:rgba(34,197,94,.12);color:#22C55E}
.lang-badge.es{background:rgba(250,204,21,.12);color:#FACC15}