:root{
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  color:#f4f5f7;background:#0d0f13;
  --panel:#15181e;--panel2:#1b1f27;--border:#2a303a;--muted:#9ca6b5;
  --accent:#e7c85e;--danger:#ff7777;--good:#62d394;--blue:#8eb5ff;
}
*{box-sizing:border-box}
body{margin:0;min-height:100vh;background:radial-gradient(circle at 70% 10%,#1b1d23 0,#0d0f13 42%,#090b0e 100%)}
button,input,textarea{font:inherit}
button{cursor:pointer}
.hidden{display:none!important}
.shell{width:min(1040px,100%);margin:0 auto;padding:24px 16px 44px}
.panel{background:rgba(21,24,30,.97);border:1px solid var(--border);border-radius:22px;box-shadow:0 24px 70px rgba(0,0,0,.34);overflow:hidden}
.login-card{max-width:620px;margin:8vh auto;padding:34px;overflow:visible}
.brand{font-size:13px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--accent)}
h1{margin:8px 0 10px;font-size:clamp(26px,4vw,38px);line-height:1.05}
h2{margin:0 0 8px;font-size:21px}
p{line-height:1.5}
.sub{font-size:16px;color:var(--muted);margin-bottom:26px}
.fine,.muted,.status,.history-meta,.persona small{color:var(--muted)}
.fine{font-size:12px;margin:18px 0 0}
label{display:block;font-size:13px;font-weight:750;margin:15px 0 8px}
.login-row{display:flex;gap:10px}
input,textarea{width:100%;background:#0f1217;border:1px solid #343b47;color:#f7f8fa;border-radius:12px;padding:13px 14px;outline:none}
input:focus,textarea:focus{border-color:var(--accent);box-shadow:0 0 0 2px rgba(231,200,94,.12)}
button{border:0;border-radius:12px;background:var(--accent);color:#171717;font-weight:800;padding:12px 18px}
button:hover{filter:brightness(1.06)}
button:disabled{opacity:.5;cursor:not-allowed}
.ghost{background:#242933;color:#f3f4f6;border:1px solid #353c48}
.compact{padding:9px 11px;font-size:13px}
.error{color:var(--danger);font-size:13px}
.topbar,.chat-head{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 20px;border-bottom:1px solid var(--border)}
.topbar h1{font-size:23px;margin:4px 0}
.home-body{padding:24px}
.start-card{display:grid;grid-template-columns:minmax(220px,.8fr) minmax(360px,1.2fr);gap:22px;align-items:center;padding:20px;border:1px solid var(--border);border-radius:18px;background:#111419}
.start-card p{margin:0;color:var(--muted)}
.choice-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.persona{display:flex;align-items:center;text-align:left;gap:12px;background:var(--panel2);color:#fff;border:1px solid #303743;padding:16px}
.persona:hover{border-color:var(--accent)}
.persona>span:last-child{display:flex;flex-direction:column;gap:3px}
.avatar{width:42px;height:42px;border-radius:50%;display:inline-grid;place-items:center;font-weight:900;flex:0 0 auto;background:#d8bc57;color:#26200c}
.avatar.casey{background:var(--blue);color:#10192c}
.history-head{display:flex;align-items:end;justify-content:space-between;gap:12px;margin:28px 0 12px}
.history-head p{margin:0;font-size:13px}
.history-list{display:flex;flex-direction:column;border:1px solid var(--border);border-radius:16px;overflow:hidden}
.history-row{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;text-align:left;background:#13161b;color:#fff;border-radius:0;border-bottom:1px solid var(--border);padding:15px 16px}
.history-row:last-child{border-bottom:0}
.history-row:hover{background:#1a1e25;filter:none}
.history-row>div{min-width:0}
.history-row strong{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-bottom:4px}
.history-meta{font-size:12px}
.specialist-badge{font-size:11px;border:1px solid #504a2a;color:#f2d97f;border-radius:999px;padding:5px 8px}
.specialist-badge.casey{border-color:#344f7f;color:#a8c5ff}
.empty{padding:28px;text-align:center;color:var(--muted);border:1px dashed var(--border);border-radius:16px}
.chat{min-height:720px;display:flex;flex-direction:column}
.chat-actions,.active-persona,.chat-right{display:flex;align-items:center;gap:11px}
.active-persona>div{display:flex;flex-direction:column;gap:2px;min-width:0}
.active-persona strong{font-size:15px}
.active-persona small{max-width:360px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.messages{flex:1;min-height:500px;max-height:68vh;overflow:auto;padding:22px;display:flex;flex-direction:column;gap:14px;background:linear-gradient(180deg,#12151a,#101217)}
.msg{max-width:min(78%,700px);display:flex;flex-direction:column;gap:7px}
.msg.user{align-self:flex-end}
.msg.assistant{align-self:flex-start}
.bubble{padding:12px 14px;border-radius:16px;line-height:1.48;white-space:pre-wrap;overflow-wrap:anywhere}
.user .bubble{background:var(--accent);color:#17150d;border-bottom-right-radius:5px}
.assistant .bubble{background:#232833;color:#f5f6f8;border:1px solid #303744;border-bottom-left-radius:5px}
.feedback{display:flex;align-items:center;gap:7px;flex-wrap:wrap;font-size:12px;color:var(--muted)}
.feedback button{padding:6px 9px;border-radius:9px;background:#1b1f27;color:#cbd2dc;border:1px solid #303744;font-size:12px}
.feedback button.selected.good{border-color:var(--good);color:var(--good)}
.feedback button.selected.bad{border-color:var(--danger);color:var(--danger)}
.feedback-comment{display:none;margin-top:2px;gap:7px;min-width:min(520px,80vw)}
.feedback-comment.show{display:flex}
.feedback-comment input{font-size:12px;padding:8px 10px}
.feedback-comment button{font-size:12px;padding:7px 10px}
.composer{display:flex;gap:10px;padding:14px 16px 9px;border-top:1px solid var(--border);background:#15181e}
.composer textarea{resize:none;min-height:48px;max-height:140px}
.composer button{min-width:86px}
.status{height:26px;padding:0 18px 9px;font-size:12px}
.typing{display:inline-flex;align-items:center;gap:5px;padding:12px 14px;background:#232833;border-radius:16px;border:1px solid #303744}
.typing i{width:7px;height:7px;background:#9ca6b5;border-radius:50%;animation:b 1s infinite alternate}
.typing i:nth-child(2){animation-delay:.18s}.typing i:nth-child(3){animation-delay:.36s}
.typing span{margin-left:4px;font-size:12px;color:var(--muted)}
.system-error{align-self:flex-start;color:#ffd0d0;background:#351d20;border:1px solid #5d3035;padding:10px 12px;border-radius:12px}
@keyframes b{to{opacity:.25;transform:translateY(-3px)}}
@media(max-width:760px){
  .shell{padding:0}
  .panel{border-radius:0;border-left:0;border-right:0;min-height:100vh}
  .login-card{margin:0;max-width:none;padding:28px 18px}
  .login-row{flex-direction:column}
  .topbar{align-items:flex-start}
  .home-body{padding:18px 14px}
  .start-card{grid-template-columns:1fr;padding:16px}
  .choice-grid{grid-template-columns:1fr}
  .history-head{align-items:center}
  .chat{min-height:100vh}
  .chat-head{padding:10px 12px;align-items:flex-start}
  .chat-actions{gap:8px}
  .chat-right{gap:6px}
  .active-persona .avatar{display:none}
  .active-persona small{max-width:150px}
  .messages{max-height:none;min-height:0;padding:16px 12px}
  .msg{max-width:90%}
  .composer{position:sticky;bottom:0;padding:10px 10px 6px}
  .composer button{min-width:72px}
  .feedback-comment{min-width:min(340px,88vw)}
}
@media(max-width:420px){
  .shell{width:100%}
  .topbar h1{font-size:20px}
  .history-row{padding:13px 12px}
  .specialist-badge{display:none}
  .chat-head{gap:8px}
  .chat-right .compact{font-size:12px;padding:8px}
  .backBtn{font-size:12px}
  .msg{max-width:92%}
}