:root{
  --navy:#14182E; --navy2:#1c2348; --light:#F7F8FC; --card:#FFFFFF;
  --blue:#34427E; --violet:#6B4357; --rust:#B83D0C;
  --text:#111827; --muted:#6B7280; --line:#E5E7EB;
  --ok:#16A34A; --warn:#D97706; --bad:#DC2626;
  --grad:linear-gradient(90deg,var(--blue),var(--violet),var(--rust));
  --radius:14px;
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:"Outfit","DM Sans",-apple-system,Segoe UI,Roboto,sans-serif;background:var(--light);color:var(--text);line-height:1.5}
.hidden{display:none!important}
button{font-family:inherit;cursor:pointer}
input,textarea,select{font-family:inherit;font-size:15px;width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--text)}
input:focus,textarea:focus{outline:none;border-color:var(--blue)}
.btn{background:var(--grad);color:#fff;border:none;padding:11px 18px;border-radius:10px;font-weight:600;font-size:15px}
.btn.ghost{background:#fff;color:var(--text);border:1px solid var(--line)}
.btn:disabled{opacity:.6}
.logo{font-weight:800;font-size:22px;letter-spacing:-.4px}
.logo span{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.muted{color:var(--muted)}
.err{color:var(--bad);font-size:14px;min-height:18px}
.pill{display:inline-block;font-size:12px;padding:3px 10px;border-radius:999px;background:#EEF1FA;color:var(--blue);font-weight:600}
.pill.warn{background:#FEF3C7;color:var(--warn)} .pill.bad{background:#FEE2E2;color:var(--bad)}

/* ---- auth ---- */
.auth{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px;
  background:radial-gradient(1000px 500px at 50% -10%,var(--navy2),var(--navy))}
.auth-card{background:#fff;border-radius:20px;padding:34px;width:100%;max-width:400px;box-shadow:0 20px 60px rgba(0,0,0,.3)}
.auth-card h1{font-size:24px;margin:14px 0 4px}
.auth-card .field{margin-top:14px}
.auth-card label{display:block;font-size:13px;font-weight:600;margin-bottom:5px;color:var(--muted)}
.auth-card .btn{width:100%;margin-top:18px}
.switch{margin-top:16px;text-align:center;font-size:14px}
.switch a{color:var(--blue);font-weight:600;text-decoration:none;cursor:pointer}

/* ---- app shell ---- */
.shell{display:grid;grid-template-columns:240px 1fr;min-height:100vh}
.side{background:var(--navy);color:#cbd2ea;padding:22px 16px;display:flex;flex-direction:column;gap:6px}
.side .logo{color:#fff;margin-bottom:18px;padding:0 8px}
.nav{display:flex;flex-direction:column;gap:2px}
.nav button{background:none;border:none;color:#aab1d6;text-align:left;padding:11px 14px;border-radius:10px;font-size:15px;font-weight:500}
.nav button.active{background:rgba(255,255,255,.08);color:#fff}
.side .who{margin-top:auto;font-size:13px;padding:12px 8px;border-top:1px solid rgba(255,255,255,.1)}
.main{padding:30px 36px;overflow:auto}
.head{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}
.head h2{font-size:24px}
.grid{display:grid;gap:16px}
.cards{grid-template-columns:repeat(auto-fill,minmax(220px,1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.card h3{font-size:15px;margin-bottom:6px}
.stat{font-size:30px;font-weight:800}
.row{display:flex;gap:10px;align-items:center}
.list .item{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px;margin-bottom:10px}
.list .item .t{font-weight:600}

/* chat */
.chat-wrap{display:flex;flex-direction:column;height:calc(100vh - 130px)}
.msgs{flex:1;overflow:auto;display:flex;flex-direction:column;gap:10px;padding:6px}
.msg{max-width:74%;padding:11px 14px;border-radius:14px}
.msg.user{align-self:flex-end;background:var(--blue);color:#fff;border-bottom-right-radius:4px}
.msg.assistant{align-self:flex-start;background:#fff;border:1px solid var(--line);border-bottom-left-radius:4px}
.msg .prov{font-size:11px;color:var(--blue);margin-top:6px}
.composer{display:flex;gap:10px;margin-top:12px}
.composer input{flex:1}
.disclaimer{font-size:12px;color:var(--warn);background:#FEF3C7;padding:8px 12px;border-radius:8px;margin-bottom:10px}
@media(max-width:760px){.shell{grid-template-columns:1fr}.side{flex-direction:row;flex-wrap:wrap;align-items:center}.side .who{display:none}.nav{flex-direction:row;flex-wrap:wrap}.main{padding:18px}}