:root{
  --bg:#11131a; --bg2:#171a24; --panel:#1e2230; --line:#2c3142;
  --txt:#e7e9f0; --muted:#9aa0b4; --accent:#c08adf; --accent2:#7aa2ff;
  --me:#2b3350; --bot:#21283a; --radius:16px;
}
*{box-sizing:border-box}
/* `.modal`/`.ghost` fijan display y, por especificidad, anularían el atributo
   hidden del navegador (el modal saldría siempre abierto). Lo forzamos. */
[hidden]{display:none !important}
html,body{height:100%}
body{
  margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  background:radial-gradient(1200px 600px at 80% -10%,#241a33 0%,var(--bg) 55%);
  color:var(--txt);display:flex;flex-direction:column;height:100vh;
}

/* ---------- Login ---------- */
.login-body{align-items:center;justify-content:center}
.login-card{
  background:var(--panel);border:1px solid var(--line);border-radius:20px;
  padding:34px 30px;width:min(380px,92vw);text-align:center;
  box-shadow:0 20px 60px rgba(0,0,0,.4);
}
.brand{display:flex;align-items:center;justify-content:center;gap:10px;margin-bottom:6px}
.brand-emoji{font-size:34px}
.brand h1{margin:0;font-size:30px;letter-spacing:.5px}
.sub{color:var(--muted);font-size:14px;margin:6px 0 22px}
.login-form{display:flex;flex-direction:column;gap:12px}
.login-form input,.composer textarea,.modal textarea,.modal input,.modal select{
  background:var(--bg2);border:1px solid var(--line);color:var(--txt);
  border-radius:12px;padding:12px 14px;font-size:15px;outline:none;width:100%;
}
.login-form input:focus{border-color:var(--accent)}
.login-form button,.modal button:not(.ghost){
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  color:#101018;font-weight:700;border:0;border-radius:12px;padding:12px;
  font-size:15px;cursor:pointer;
}
.error{color:#ff8b8b;font-size:13px;margin-top:12px}

/* ---------- Topbar ---------- */
.topbar{
  display:flex;align-items:center;justify-content:space-between;
  padding:12px 18px;background:rgba(20,23,32,.85);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5;
}
.who{display:flex;align-items:center;gap:12px}
.avatar{
  width:44px;height:44px;border-radius:50%;display:grid;place-items:center;
  font-size:22px;background:linear-gradient(135deg,#3a2b52,#26314f);
  border:1px solid var(--line);
}
.who small{display:block;color:var(--muted);font-size:11px}
.actions{display:flex;align-items:center;gap:8px}
.ghost{
  background:transparent;border:1px solid var(--line);color:var(--txt);
  border-radius:10px;padding:8px 11px;font-size:14px;cursor:pointer;
  text-decoration:none;display:inline-flex;align-items:center;
}
.ghost:hover{border-color:var(--accent)}

/* ---------- Chat ---------- */
.chat{
  flex:1;overflow-y:auto;padding:22px max(16px,calc(50vw - 380px));
  display:flex;flex-direction:column;gap:14px;
}
.bubble{
  max-width:78%;padding:11px 15px;border-radius:var(--radius);
  line-height:1.5;font-size:15px;white-space:pre-wrap;word-wrap:break-word;
  animation:pop .18s ease;
}
.bubble.me{align-self:flex-end;background:var(--me);border-bottom-right-radius:5px}
.bubble.bot{align-self:flex-start;background:var(--bot);border-bottom-left-radius:5px;
  border:1px solid var(--line)}
.bubble.bot strong{color:var(--accent)}
.bubble.typing{color:var(--muted);font-style:italic}
.welcome{align-self:center;color:var(--muted);text-align:center;max-width:520px;
  font-size:14px;line-height:1.6;margin-top:8px}
@keyframes pop{from{transform:translateY(6px);opacity:0}to{transform:none;opacity:1}}

/* ---------- Composer ---------- */
.composer{
  display:flex;gap:10px;padding:14px max(16px,calc(50vw - 380px));
  border-top:1px solid var(--line);background:rgba(20,23,32,.85);
}
.composer textarea{resize:none;max-height:160px;line-height:1.4}
.composer button{
  width:50px;border:0;border-radius:12px;cursor:pointer;font-size:20px;
  background:linear-gradient(135deg,var(--accent),var(--accent2));color:#101018;
}
.composer button:disabled{opacity:.5;cursor:default}

/* ---------- Modal corpus ---------- */
.modal{position:fixed;inset:0;background:rgba(0,0,0,.55);display:grid;
  place-items:center;z-index:20;padding:16px}
.modal-card{background:var(--panel);border:1px solid var(--line);border-radius:18px;
  width:min(560px,96vw);max-height:88vh;overflow-y:auto;padding:22px}
.modal-head{display:flex;justify-content:space-between;align-items:center}
.modal-head h2{margin:0;font-size:20px}
.modal h3{margin:20px 0 4px;font-size:15px;color:var(--accent2)}
.modal textarea,.modal input,.modal select{margin:8px 0}
.modal button:not(.ghost){width:100%;cursor:pointer;margin-top:4px}
.muted{color:var(--muted);font-size:13px}