:root{
  --bg:#f4f6fb;
  --panel:#ffffff;
  --panel2:#fafbff;
  --line:#e5e9f2;
  --line2:#dde3ee;
  --text:#0f172a;
  --muted:#64748b;
  --brand1:#2563eb;
  --brand2:#4f46e5;
  --brand-soft:#eef2ff;
  --radius:16px;
  --shadow:0 10px 30px -12px rgba(15,23,42,.18);
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Inter,sans-serif;
  background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;
}
/* ARMADILHA: container flex vence a regra UA de [hidden] — precisa do !important */
.screen[hidden]{display:none !important}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}

/* ---------- LOGIN ---------- */
.screen{min-height:100%;display:flex;align-items:center;justify-content:center;padding:24px}
.login-wrap{width:100%;max-width:400px}
.login-card{
  background:var(--panel);border:1px solid var(--line);border-radius:20px;
  box-shadow:var(--shadow);padding:40px 34px 34px;text-align:center;
}
.logo{display:flex;justify-content:center;margin-bottom:14px}
.logo svg{border-radius:14px;box-shadow:0 8px 20px -8px rgba(37,99,235,.55)}
h1{margin:0 0 4px;font-size:30px;letter-spacing:-.5px}
.subt{color:var(--muted);font-size:13.5px;line-height:1.5;margin:0 0 26px}
.pass-box{display:flex;gap:10px;margin-bottom:6px}
.pass-box input{
  flex:1;padding:13px 15px;border:1px solid var(--line2);border-radius:12px;
  font-size:15px;background:var(--panel2);color:var(--text);outline:none;
}
.pass-box input:focus{border-color:var(--brand1);box-shadow:0 0 0 3px var(--brand-soft)}
.err{color:#dc2626;font-size:13px;margin:10px 0 0;min-height:16px}

/* ---------- BOTÕES ---------- */
.primary{
  background:linear-gradient(135deg,var(--brand1),var(--brand2));color:#fff;
  padding:12px 20px;border-radius:12px;font-weight:600;font-size:15px;
  box-shadow:0 6px 16px -8px rgba(79,70,229,.6);transition:.15s;
}
.primary:hover{filter:brightness(1.05)}
.primary:disabled{opacity:.5;cursor:default;filter:none}
.ghost{padding:8px 14px;border-radius:10px;color:#334155;font-weight:500;font-size:13.5px;border:1px solid var(--line2);background:var(--panel)}
.ghost:hover{background:var(--panel2);border-color:var(--brand1);color:var(--brand1)}
.ghost.wide{width:100%}

/* ---------- APP LAYOUT ---------- */
#screen-app{flex-direction:column;padding:0}
.topbar{
  height:60px;display:flex;align-items:center;justify-content:space-between;
  padding:0 20px;background:var(--panel);border-bottom:1px solid var(--line);
  flex:0 0 auto;
}
.brand{display:flex;align-items:center;gap:10px}
.logo-min{
  width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--brand1),var(--brand2));
  color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center;font-size:15px;
}
.bname{font-weight:800;font-size:17px;letter-spacing:-.3px}
.btag{color:var(--muted);font-size:12.5px;margin-left:4px}
.top-actions{display:flex;align-items:center;gap:12px}
.mem-hint{color:var(--muted);font-size:13px}
.layout{flex:1;display:flex;min-height:0;width:100%}

/* ---------- SIDEBAR ---------- */
.sidebar{
  width:280px;flex:0 0 auto;background:var(--panel2);border-right:1px solid var(--line);
  display:flex;flex-direction:column;padding:16px;min-height:0;
}
.new{
  display:flex;align-items:center;gap:8px;justify-content:center;
  padding:12px;border-radius:12px;background:var(--panel);border:1px solid var(--line2);
  font-weight:600;color:var(--brand1);font-size:14px;transition:.15s;
}
.new:hover{border-color:var(--brand1);background:var(--brand-soft)}
.new span{font-size:20px;font-weight:400}
.clist{flex:1;overflow-y:auto;margin-top:14px;display:flex;flex-direction:column;gap:6px}
.conv{
  display:flex;gap:8px;align-items:center;padding:10px 11px;border-radius:11px;
  border:1px solid transparent;cursor:pointer;text-align:left;transition:.12s;
}
.conv:hover{background:var(--panel)}
.conv.active{background:var(--brand-soft);border-color:var(--brand1)}
.conv .t{flex:1;min-width:0}
.conv .tn{font-weight:600;font-size:13.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.conv .tm{color:var(--muted);font-size:11.5px;margin-top:1px}
.iconbtn{color:#94a3b8;font-size:14px;border-radius:7px;padding:3px 6px;opacity:0;transition:.12s}
.conv:hover .iconbtn{opacity:1}
.iconbtn:hover{color:#dc2626;background:#fee2e2}
.side-foot{margin-top:14px;border-top:1px solid var(--line);padding-top:14px}

/* ---------- MAIN / CHAT ---------- */
.main{flex:1;display:flex;flex-direction:column;min-width:0;min-height:0}
.chat-header{
  padding:14px 24px;border-bottom:1px solid var(--line);background:var(--panel);
  display:flex;align-items:center;justify-content:space-between;gap:10px;
}
.chat-header span{font-weight:700;font-size:14.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ccount{color:var(--muted);font-weight:500;font-size:12.5px;flex:0 0 auto;background:var(--panel2);border:1px solid var(--line);padding:3px 10px;border-radius:20px}
.msgs{flex:1;overflow-y:auto;padding:24px;display:flex;flex-direction:column;gap:16px}
.empty{max-width:520px;margin:auto;text-align:center;padding-top:30px}
.empty-icon{font-size:44px;opacity:.5;margin-bottom:12px}
.empty h2{margin:0 0 8px;font-size:22px}
.empty p{color:var(--muted);line-height:1.6;margin:0 0 20px}
.sugg{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}
.chip{padding:9px 14px;border-radius:20px;border:1px solid var(--line2);background:var(--panel);font-size:13px;color:#334155;transition:.12s}
.chip:hover{border-color:var(--brand1);color:var(--brand1);background:var(--brand-soft)}

.msg{display:flex;gap:12px;max-width:860px}
.msg .dummy{width:30px;height:30px;border-radius:8px;flex:0 0 30px;font-weight:800;display:flex;align-items:center;justify-content:center;font-size:14px}
.msg.user{align-self:flex-end;flex-direction:row-reverse}
.msg.user .dummy{background:var(--brand-soft);color:var(--brand1)}
.msg.assistant .dummy{background:linear-gradient(135deg,var(--brand1),var(--brand2));color:#fff}
.bubble{
  padding:13px 16px;border-radius:14px;background:var(--panel);border:1px solid var(--line);
  line-height:1.65;font-size:14.5px;white-space:pre-wrap;word-break:break-word;
  box-shadow:0 2px 8px -4px rgba(15,23,42,.06);
}
.msg.user .bubble{background:linear-gradient(135deg,var(--brand1),var(--brand2));color:#fff;border:none;border-bottom-right-radius:4px}
.msg.assistant .bubble{border-bottom-left-radius:4px}
.bubble code{background:rgba(15,23,42,.06);padding:2px 6px;border-radius:6px;font-family:"SFMono-Regular",Menlo,Consolas,monospace;font-size:13px}
.msg.user .bubble code{background:rgba(255,255,255,.22);color:#fff}
.thinking{
  align-self:flex-start;color:var(--muted);font-size:13px;display:flex;gap:8px;align-items:center;
  padding:10px 14px;border:1px dashed var(--line2);border-radius:12px;margin-left:0;
}
.thinking .dot{animation:blink 1.2s infinite;font-size:16px}
@keyframes blink{50%{opacity:.25}}

/* ---------- COMPOSER ---------- */
.composer{
  padding:14px 24px 10px;background:var(--panel);border-top:1px solid var(--line);
  display:flex;gap:12px;align-items:flex-end;
}
.composer textarea{
  flex:1;resize:none;padding:13px 16px;border:1px solid var(--line2);border-radius:14px;
  font-size:15px;line-height:1.5;font-family:inherit;background:var(--panel2);color:var(--text);
  outline:none;max-height:180px;min-height:48px;
}
.composer textarea:focus{border-color:var(--brand1);box-shadow:0 0 0 3px var(--brand-soft)}
.send{flex:0 0 auto;min-width:96px}
.disclaimer{color:var(--muted);font-size:11px;text-align:center;padding:0 24px 12px;margin:0}

/* ---------- MODAL MEMÓRIA ---------- */
.modal{
  position:fixed;inset:0;background:rgba(15,23,42,.42);display:flex;align-items:center;justify-content:center;
  padding:20px;z-index:50;
}
.modal[hidden]{display:none !important}
.modal-card{
  background:var(--panel);border-radius:18px;box-shadow:var(--shadow);width:100%;max-width:640px;
  max-height:86vh;display:flex;flex-direction:column;overflow:hidden;
}
.modal-head{display:flex;align-items:center;justify-content:space-between;padding:18px 22px;border-bottom:1px solid var(--line)}
.modal-head h2{margin:0;font-size:18px}
.modal-body{overflow-y:auto;padding:20px 22px;display:flex;flex-direction:column;gap:22px}
.mem-sec h3{margin:0 0 4px;font-size:14.5px}
.mem-sec .hint{color:var(--muted);font-size:12.5px;margin:0 0 12px}
.addrow{display:flex;gap:10px;margin-bottom:12px}
.addrow input{flex:1;padding:11px 14px;border:1px solid var(--line2);border-radius:11px;font-size:14px;background:var(--panel2);outline:none}
.addrow input:focus{border-color:var(--brand1)}
.addrow.right{justify-content:flex-end}
.memlist{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}
.memlist li{
  display:flex;gap:10px;align-items:flex-start;padding:11px 13px;background:var(--panel2);
  border:1px solid var(--line);border-radius:11px;font-size:13.5px;line-height:1.5;
}
.memlist .n{color:var(--muted);font-weight:700;font-size:12px;margin-top:2px;flex:0 0 auto}
.memlist .txt{flex:1}
.memlist button{color:#94a3b8;font-size:13px;border-radius:7px;padding:2px 6px}
.memlist button:hover{color:#dc2626;background:#fee2e2}
.persona-edit textarea{
  width:100%;padding:13px 15px;border:1px solid var(--line2);border-radius:12px;font-size:13px;
  font-family:Menlo,Consolas,monospace;line-height:1.6;background:var(--panel2);color:var(--text);outline:none;resize:vertical;
}
.persona-edit textarea:focus{border-color:var(--brand1)}
.ok{color:#059669;font-size:13px;margin:8px 0 0;font-weight:600}

/* ---------- RESPONSIVO ---------- */
@media (max-width:720px){
  .layout{flex-direction:column}
  .sidebar{width:100%;flex:0 0 auto;flex-direction:row;flex-wrap:wrap;gap:10px;padding:12px;border-right:none;border-bottom:1px solid var(--line)}
  .new{width:auto;padding:10px 14px}
  .clist{flex:0 0 auto;flex-direction:row;overflow-x:auto;width:100%;margin-top:0;flex-wrap:nowrap}
  .conv{flex:0 0 auto;max-width:220px}
  .side-foot{width:100%;border-top:none;padding-top:0;margin-top:0}
  .msgs{padding-bottom:140px}
  .composer{padding-bottom:max(10px,env(safe-area-inset-bottom,0px))}
  .top-actions .mem-hint{display:none}
}