html.dark-theme{--bg:#050505;--surface:#161616;--surface-alt:#0F0F12;--text-primary:#D4D4D4;--text-secondary:#A1A1AA;--text-muted:rgba(212,212,212,0.45);--border:rgba(212,212,212,0.08);--border-strong:rgba(212,212,212,0.15);--hover:rgba(212,212,212,0.08);--active:rgba(212,212,212,0.12);--glass:rgba(22,22,22,0.78);--btn-bg:#D4D4D4;--btn-fg:#050505;--card-bg:rgba(22,22,22,0.82);--accent:#6D5EF8;--success:#43A047;--danger:#EB5757;--white:#FFFFFF;--black:#000000}
html.light-theme{--bg:#FFFFFF;--surface:#F2F2F2;--surface-alt:#E9E9E9;--text-primary:#101010;--text-secondary:#52525B;--text-muted:rgba(16,16,16,0.45);--border:rgba(16,16,16,0.08);--border-strong:rgba(16,16,16,0.15);--hover:rgba(16,16,16,0.06);--active:rgba(16,16,16,0.10);--glass:rgba(255,255,255,0.78);--glass-end:rgba(255,255,255,0.92);--btn-bg:#101010;--btn-fg:#FFFFFF;--card-bg:rgba(255,255,255,0.85);--success:#2E7D32;--danger:#D32F2F;--white:#FFFFFF;--black:#000000}
*{margin:0;padding:0;box-sizing:border-box}
::selection{background:var(--text-primary);color:var(--bg)}
::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:var(--border-strong);border-radius:3px}
html{height:100%;scroll-behavior:smooth}
html,body{height:100%;margin:0;padding:0;font-family:'Segoe UI',system-ui,-apple-system,sans-serif;color:var(--text-primary);font-size:14px;font-weight:600;letter-spacing:-.2px;transition:background .2s,color .2s;-webkit-font-smoothing:antialiased}
body{background:var(--bg);min-height:100vh;display:flex}
a{color:var(--text-secondary);text-decoration:none}
a:hover{color:var(--text-primary)}

.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:260px;min-width:260px;z-index:100;
  display:flex;flex-direction:column;
  background:var(--bg);border-right:1px solid rgba(255,255,255,0.05);
  overflow:hidden;
}
.sidebar-brand{display:flex;align-items:center;gap:8px;padding:16px;cursor:pointer;text-decoration:none;border-bottom:1px solid rgba(255,255,255,0.05)}
.sidebar-logo{width:20px;height:20px;flex-shrink:0}
.sidebar-name{font-size:14px;font-weight:600;color:var(--text-secondary);letter-spacing:-.2px}
.sidebar-nav{flex:1;overflow-y:auto;padding:4px 8px}
.sidebar-nav::-webkit-scrollbar{width:4px}
.sidebar-nav::-webkit-scrollbar-thumb{background:rgba(255,255,255,0.05);border-radius:2px}
.sidebar-btn{
  display:flex;align-items:center;gap:10px;
  padding:10px 12px;border:none;border-radius:8px;background:none;cursor:pointer;
  font-family:inherit;font-size:13px;font-weight:500;color:var(--text-secondary);
  transition:background .15s;white-space:nowrap;outline:none;text-decoration:none;
  text-align:left;width:100%
}
.sidebar-btn img{width:16px;height:16px;flex-shrink:0;opacity:.85}
.sidebar-btn:hover{background:rgba(255,255,255,0.04);color:var(--text)}
.sidebar-btn:hover img{opacity:1}
.sidebar-btn.active{background:rgba(255,255,255,0.07);color:var(--text)}
.sidebar-btn.active img{opacity:1}
.sidebar-divider{height:1px;background:rgba(255,255,255,0.05);margin:8px 10px}
.sidebar-footer{padding:4px 8px 12px;border-top:1px solid rgba(255,255,255,0.05)}
.sidebar-footer .sidebar-btn{color:rgba(255,255,255,0.35)}
.sidebar-footer .sidebar-btn:hover{color:var(--text-secondary)}

#app{flex:1;min-width:0}
main{flex:1;margin-left:260px;padding:0 48px;display:flex;flex-direction:column;align-items:center}
.page-header{
  padding:60px 0 32px;width:100%
}
.page-header h1{
  font-size:clamp(28px,4vw,44px);font-weight:700;
  letter-spacing:-1px;line-height:1.1;margin-bottom:12px
}
.page-header p{font-size:16px;color:var(--text-secondary);max-width:560px}

.card{background:var(--card-bg);border:1px solid var(--border);border-radius:12px;padding:24px;margin-bottom:20px;transition:border-color .2s,background .15s}
.card:hover{border-color:var(--border-strong);background:var(--surface)}
.card h2{margin-top:0;font-size:16px;font-weight:600}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px}
.stat{background:var(--card-bg);border:1px solid var(--border);border-radius:12px;padding:20px;transition:border-color .2s,background .15s}
.stat:hover{border-color:var(--border-strong);background:var(--surface)}
.stat .label{color:var(--text-muted);font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:1.2px}
.stat .value{font-size:28px;font-weight:700;margin-top:8px;letter-spacing:-.5px}
.stat .value.green{color:var(--success)} .stat .value.blue{color:var(--accent)} .stat .value.red{color:var(--danger)}
button{
  padding:10px 20px;border-radius:8px;font-size:14px;font-weight:600;
  transition:transform .15s,background .15s;display:inline-flex;align-items:center;gap:8px;
  border:none;cursor:pointer;font-family:inherit;
  background:var(--btn-bg);color:var(--btn-fg)
}
button:hover{transform:translateY(-1px);opacity:.9}
button.ghost{background:transparent;border:1px solid var(--border-strong);color:var(--text-primary);font-weight:500}
button.ghost:hover{background:var(--hover);transform:translateY(-1px);opacity:1}
button.danger{background:transparent;border:1px solid var(--danger);color:var(--danger)}
button.danger:hover{background:var(--danger);color:var(--white);transform:translateY(-1px);opacity:1}
button:disabled{opacity:.5;cursor:not-allowed;transform:none}
input,select,textarea{width:100%;background:var(--surface);border:1px solid var(--border);color:var(--text-primary);border-radius:8px;padding:12px 14px;font-size:14px;margin-bottom:12px;font-family:inherit;transition:border-color .15s}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--border-strong)}
textarea{min-height:90px;resize:vertical}
label{display:block;font-size:13px;color:var(--text-muted);margin-bottom:6px;font-weight:500}
.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
table{width:100%;border-collapse:collapse;font-size:13px}
th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--border)}
th{color:var(--text-muted);font-weight:600;font-size:11px;text-transform:uppercase;letter-spacing:1px}
tr:hover{background:var(--hover)}
.pill{display:inline-block;padding:3px 10px;border-radius:100px;font-size:11px;font-weight:600;background:var(--surface);border:1px solid var(--border);margin:2px}
.pill.green{color:var(--success);border-color:var(--success)} .pill.red{color:var(--danger);border-color:var(--danger)}
.code{font-family:'SF Mono',ui-monospace,SFMono-Regular,Menlo,monospace;background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:12px 14px;font-size:13px;word-break:break-all;line-height:1.6}
.muted{color:var(--text-muted)} .small{font-size:12px}
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(20px);background:var(--surface);border:1px solid var(--border-strong);border-radius:12px;padding:14px 20px;font-size:14px;box-shadow:0 20px 60px rgba(0,0,0,.5);display:none;z-index:100;max-width:90vw;opacity:0;transition:opacity .3s,transform .3s}
.toast.show{display:block;opacity:1;transform:translateX(-50%) translateY(0)}
.toast.err{border-color:var(--danger)} .toast.ok{border-color:var(--success)}
.hidden{display:none!important}
#login{max-width:420px;width:100%;margin:80px auto}
#login .card{padding:32px}
.errors{color:var(--danger);font-size:13px;margin-bottom:10px}
.mono{font-family:'SF Mono',ui-monospace,Menlo,monospace}
.chatbox{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:16px;font-size:14px;white-space:pre-wrap;min-height:120px;max-height:320px;overflow:auto;line-height:1.6}
.kb{width:1px}
.page{width:92%;margin:0 auto;align-self:center}

/* model cards */
.models-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:12px;margin-top:12px}
.model-card{background:var(--card-bg);border:1px solid var(--border);border-radius:12px;padding:18px;transition:border-color .2s,background .15s;display:flex;flex-direction:column;gap:12px}
.model-card:hover{border-color:var(--border-strong);background:var(--surface)}
.model-card h3{font-size:14px;font-weight:700;letter-spacing:-.2px;color:var(--text-primary);word-break:break-word}
.model-card .m-prov{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:1px;color:var(--text-muted);margin-top:-6px}
.model-prices{display:flex;flex-direction:column;gap:7px;margin-top:auto;padding-top:10px;border-top:1px solid var(--border)}
.m-row{display:flex;justify-content:space-between;align-items:center;font-size:13px}
.m-row .k{color:var(--text-muted)}
.m-row .v{font-weight:700;font-family:'SF Mono',ui-monospace,Menlo,monospace;color:var(--text-primary)}

/* charts */
.chart-bars{display:flex;align-items:flex-end;gap:6px;height:200px;padding-top:8px;overflow-x:auto;padding-bottom:6px}
.bar-wrap{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;height:100%;min-width:0;min-height:170px}
.bar{width:100%;background:var(--accent);border-radius:5px 5px 0 0;min-height:2px;transition:background .15s;opacity:.85}
.bar-wrap:hover .bar{background:var(--text-primary);opacity:1}
.bar-date{font-size:10px;color:var(--text-muted);margin-top:6px;white-space:nowrap}
.donut-wrap{display:flex;align-items:center;gap:32px;flex-wrap:wrap;margin-top:12px}
.donut-svg{width:180px;height:180px;flex-shrink:0}
.donut-legend{display:flex;flex-direction:column;gap:14px}
.legend-item{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--text-secondary)}
.legend-dot{width:10px;height:10px;border-radius:3px;flex-shrink:0}
.legend-item b{color:var(--text-primary)}
.ug-ring{stroke:var(--border-strong);fill:none}
.ug-arc{fill:none;stroke:var(--danger);stroke-linecap:round}
#ugDonutArc{transition:stroke-dasharray .4s}
.bar-empty{color:var(--text-muted);font-size:13px;margin:auto;align-self:center}
.modal .code{margin-bottom:4px}

/* modal */
.modal-overlay{position:fixed;inset:0;z-index:500;background:rgba(0,0,0,.62);display:flex;align-items:center;justify-content:center;padding:20px;opacity:0;visibility:hidden;transition:opacity .25s,visibility .25s}
.modal-overlay.open{opacity:1;visibility:visible}
.modal{width:100%;max-width:440px;background:var(--surface-alt);border:1px solid var(--border-strong);border-radius:16px;padding:26px;box-shadow:0 30px 90px rgba(0,0,0,.65);transform:translateY(14px) scale(.98);transition:transform .25s}
.modal-overlay.open .modal{transform:translateY(0) scale(1)}
.modal h2{font-size:18px;font-weight:700;margin-bottom:6px;color:var(--text-primary)}
.modal-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:8px}
.modal-actions button{min-width:110px;justify-content:center}

.mobile-topbar{display:none}
.scrim{position:fixed;inset:0;z-index:350;background:rgba(0,0,0,.55);opacity:0;visibility:hidden;transition:opacity .25s,visibility .25s}
.scrim.open{opacity:1;visibility:visible}
.side-close{display:none}
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}

@media(max-width:1200px){
  main{padding:0 32px}
}
@media(max-width:768px){
  body{overflow-x:hidden;flex-direction:column}
  .mobile-topbar{
    display:flex;align-items:center;gap:10px;
    position:sticky;top:0;z-index:200;padding:10px 16px;
    background:var(--bg);border-bottom:1px solid var(--border)
  }
  .burger-btn{
    display:flex;width:36px;height:36px;align-items:center;justify-content:center;
    border:none;background:none;cursor:pointer;border-radius:8px;color:#FFFFFF;flex-shrink:0
  }
  .burger-btn:hover{background:var(--hover)}
  .burger-btn svg{width:20px;height:20px;fill:currentColor}
  .m-brand{display:flex;align-items:center;gap:8px;font-size:15px;font-weight:700;color:var(--text-primary)}
  .m-brand img{width:18px;height:18px;flex-shrink:0}
  .sidebar{
    transform:translateX(-100%);transition:transform .3s ease;
    position:fixed;top:0;left:0;bottom:0;width:260px;min-width:260px;max-width:85vw;
    z-index:400;height:100%;box-shadow:0 0 60px rgba(0,0,0,.5)
  }
  .sidebar.open{transform:translateX(0)}
  .side-close{
    display:flex;position:absolute;top:12px;right:12px;width:32px;height:32px;
    align-items:center;justify-content:center;border:none;background:none;cursor:pointer;
    color:var(--text-secondary);border-radius:8px
  }
  .side-close:hover{background:var(--hover);color:var(--text-primary)}
  .side-close svg{width:16px;height:16px;fill:currentColor}
  .sidebar-brand{padding-right:44px}
  main{margin-left:0;padding:0 20px}
  #login{margin:48px auto;padding:0 20px;width:100%;transform:none}
  #login .card{padding:24px}
  .page-header{padding:32px 0 20px}
  .page-header p{font-size:14px}
  .card{padding:18px}
  .grid{grid-template-columns:repeat(2,1fr);gap:10px}
  .stat{padding:16px}
  .stat .value{font-size:24px}
  .row{flex-direction:column;align-items:stretch}
  .row input,.row button{width:100%;max-width:100%!important;margin:0}
  button{width:100%;justify-content:center}
  table button{width:auto}
  .code{font-size:12px;overflow-x:auto}
  .chatbox{font-size:13px}
}
@media(max-width:420px){
  .grid{grid-template-columns:1fr}
  .page-header h1{font-size:26px}
  .chatbox{max-height:260px}
}