:root{
  --bg:#0b0e1d; --panel:#141830; --panel2:#1a1f3a; --line:#2a2f55; --line2:#343a68;
  --text:#eef0ff; --muted:#9aa3c7; --acc:#5b8cff; --acc2:#7aa2ff; --ok:#2ecc71; --bad:#ff5c5c;
  --radius:14px; --shadow:0 14px 40px rgba(0,0,0,.45);
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0; font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  background:radial-gradient(1200px 600px at 20% -10%,#182050 0%,var(--bg) 55%);
  color:var(--text); overflow:hidden;
}
.hidden{display:none !important}
.view{height:100vh; display:flex}

/* ---------- login ---------- */
#view-login{align-items:center;justify-content:center}
.login-card{
  width:min(92vw,400px); background:var(--panel); border:1px solid var(--line);
  border-radius:var(--radius); padding:34px 30px; box-shadow:var(--shadow);
}
.brand{display:flex;align-items:center;gap:14px;margin-bottom:22px}
.brand-badge{
  width:46px;height:46px;border-radius:12px;flex:0 0 auto;
  background:linear-gradient(135deg,var(--acc),#8f5bff); display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:18px;color:#fff;letter-spacing:.5px;box-shadow:0 6px 18px rgba(91,140,255,.35);
}
.brand h1{margin:0;font-size:20px;letter-spacing:.3px}
.brand p{margin:2px 0 0;color:var(--muted);font-size:13px}
form label{display:block;font-size:13px;color:var(--muted);margin:14px 0 6px}
form input{
  width:100%;padding:11px 12px;border-radius:10px;border:1px solid var(--line2);
  background:var(--panel2);color:var(--text);font-size:15px;outline:none;transition:border .15s;
}
form input:focus{border-color:var(--acc)}
form button{
  width:100%;margin-top:20px;padding:12px;border:0;border-radius:10px;cursor:pointer;
  background:linear-gradient(135deg,var(--acc),#6a4bff);color:#fff;font-size:15px;font-weight:600;
  transition:filter .15s,transform .05s;
}
form button:hover{filter:brightness(1.1)}
form button:active{transform:translateY(1px)}
form button:disabled{opacity:.6;cursor:wait}
.error{color:var(--bad);font-size:13px;margin:10px 0 0}
.footnote{color:var(--muted);font-size:12px;text-align:center;margin:22px 0 0;line-height:1.5}

/* ---------- app ---------- */
#view-app{flex-direction:column}
.topbar{
  flex:0 0 auto;display:flex;align-items:center;gap:16px;padding:10px 18px;
  background:rgba(16,20,40,.92);border-bottom:1px solid var(--line);backdrop-filter:blur(6px);
}
.brand.mini .brand-badge{width:34px;height:34px;border-radius:9px;font-size:13px}
.brand.mini .brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand.mini .brand-text strong{font-size:14px}
.brand.mini .brand-text span{font-size:11px;color:var(--muted)}
.worker-pick{display:flex;align-items:center;gap:10px;margin-left:8px;flex:1 1 auto;min-width:0}
.worker-pick label{color:var(--muted);font-size:13px}
#worker-select{
  max-width:420px;width:auto;padding:9px 12px;border-radius:10px;border:1px solid var(--line2);
  background:var(--panel2);color:var(--text);font-size:14px;outline:none;cursor:pointer;
}
#worker-select:focus{border-color:var(--acc)}
.dot{width:10px;height:10px;border-radius:50%;flex:0 0 auto}
.dot-on{background:var(--ok);box-shadow:0 0 8px rgba(46,204,113,.7)}
.dot-off{background:var(--bad);box-shadow:0 0 6px rgba(255,92,92,.5)}
.topbar-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.topbar-actions a{color:var(--muted);font-size:13px;text-decoration:none;border:1px solid var(--line2);padding:7px 12px;border-radius:9px}
.topbar-actions a:hover{color:var(--text);border-color:var(--acc)}
.topbar-actions button{
  background:transparent;color:var(--muted);border:1px solid var(--line2);border-radius:9px;
  padding:7px 14px;cursor:pointer;font-size:13px;
}
.topbar-actions button:hover{color:#fff;border-color:var(--bad)}

#stage{position:relative;flex:1 1 auto;min-height:0;background:#0d1020}
#gui-frame{position:absolute;inset:0;width:100%;height:100%;border:0;background:#fff}
.loading{
  position:absolute;inset:0;z-index:5;display:flex;flex-direction:column;gap:14px;
  align-items:center;justify-content:center;background:rgba(13,16,32,.88);transition:opacity .25s;
}
.loading.gone{opacity:0;pointer-events:none}
.loading p{margin:0;color:var(--muted);font-size:14px}
.spinner{
  width:38px;height:38px;border-radius:50%;
  border:3px solid var(--line2);border-top-color:var(--acc);
  animation:spin .8s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}

.toast{
  position:fixed;bottom:18px;left:50%;transform:translateX(-50%);z-index:50;
  background:#1c2143;border:1px solid var(--line2);color:var(--text);
  padding:10px 18px;border-radius:10px;font-size:13px;box-shadow:var(--shadow);max-width:86vw;
}

@media (max-width:760px){
  .topbar{flex-wrap:wrap}
  .worker-pick{margin-left:0;flex-basis:100%}
  #worker-select{flex:1}
}