:root{
  --navy:#1A2238;
  --coral:#FD0154;
  --gold:#F4B860;
  --bg:#0F1420;
  --card:#171E2E;
  --border:#2A3348;
  --text:#EDEFF4;
  --muted:#9AA3B8;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);font-family:'Roboto',sans-serif;min-height:100vh}
h1,h2,h3,.brand{font-family:'Oswald',sans-serif;letter-spacing:.02em}
a{color:var(--coral);text-decoration:none}
.wrap{max-width:1100px;margin:0 auto;padding:24px}
.auth-wrap{max-width:420px;margin:8vh auto;padding:32px;background:var(--card);border:1px solid var(--border);border-radius:14px}
.brand-mark{display:flex;align-items:center;gap:10px;margin-bottom:24px}
.brand-mark img{height:32px}
.brand-mark span{font-weight:700;font-size:20px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}
.field input,.field select,.field textarea{
  width:100%;padding:11px 12px;background:#10151F;border:1px solid var(--border);
  border-radius:8px;color:var(--text);font-size:15px;font-family:inherit;
}
.btn{
  display:inline-block;padding:12px 20px;background:var(--coral);color:#fff;border:none;
  border-radius:8px;font-weight:700;font-size:15px;cursor:pointer;font-family:'Oswald',sans-serif;
}
.btn:hover{opacity:.92}
.btn-secondary{background:transparent;border:1px solid var(--border);color:var(--text)}
.error-box{background:rgba(199,62,62,.15);border:1px solid #C73E3E;color:#ffb4b4;padding:10px 12px;border-radius:8px;margin-bottom:16px;font-size:14px}
.muted{color:var(--muted);font-size:13px}
.auth-switch{margin-top:18px;font-size:14px;color:var(--muted)}

/* app shell */
.app-shell{display:flex;min-height:100vh}
.sidebar{width:260px;background:var(--card);border-right:1px solid var(--border);padding:20px;display:flex;flex-direction:column}
.sidebar .brand-mark{margin-bottom:20px}
.sidebar nav a{display:block;padding:10px 12px;border-radius:8px;color:var(--text);font-size:14px;margin-bottom:4px}
.sidebar nav a:hover, .sidebar nav a.active{background:rgba(253,1,84,.12);color:var(--coral)}
.conv-list{flex:1;overflow-y:auto;margin-top:10px}
.conv-list a{display:block;padding:9px 10px;border-radius:8px;font-size:13px;color:var(--muted);margin-bottom:2px}
.conv-list a.active,.conv-list a:hover{background:rgba(255,255,255,.05);color:var(--text)}
.sidebar-footer{border-top:1px solid var(--border);padding-top:14px;margin-top:14px;font-size:13px;color:var(--muted)}

.chat-main{flex:1;display:flex;flex-direction:column;height:100vh}
.chat-scroll{flex:1;overflow-y:auto;padding:24px}
.msg{max-width:720px;margin:0 auto 16px;display:flex}
.msg.user{justify-content:flex-end}
.bubble{padding:12px 16px;border-radius:14px;line-height:1.5;font-size:15px;white-space:pre-wrap}
.msg.user .bubble{background:var(--coral);color:#fff;border-bottom-right-radius:4px}
.msg.assistant .bubble{background:var(--card);border:1px solid var(--border);border-bottom-left-radius:4px}
.chat-empty{max-width:600px;margin:10vh auto;text-align:center;color:var(--muted)}
.chat-input-bar{border-top:1px solid var(--border);padding:16px 24px;background:var(--bg)}
.chat-input-form{max-width:720px;margin:0 auto;display:flex;gap:10px}
.chat-input-form textarea{flex:1;resize:none;padding:12px 14px;background:var(--card);border:1px solid var(--border);border-radius:10px;color:var(--text);font-family:inherit;font-size:15px}

.card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:20px;margin-bottom:16px}
.metric-group h3{font-size:14px;color:var(--gold);margin:0 0 10px}
.metric-row{display:flex;justify-content:space-between;padding:8px 0;border-bottom:1px solid var(--border);font-size:14px}
.metric-row:last-child{border-bottom:none}
table.doc-table{width:100%;border-collapse:collapse;font-size:14px}
table.doc-table th,table.doc-table td{text-align:left;padding:10px;border-bottom:1px solid var(--border)}
.status-pill{padding:3px 9px;border-radius:20px;font-size:12px;font-weight:700}
.status-listo{background:rgba(90,200,120,.15);color:#7EDB9C}
.status-procesando{background:rgba(244,184,96,.15);color:var(--gold)}
.status-error{background:rgba(199,62,62,.15);color:#ffb4b4}