:root{
  --bg:#0b0f17;--panel:#0f172a;--elev:#111827;--glass:rgba(255,255,255,.04);
  --text:#e5e7eb;--muted:#9ca3af;--border:#1f2937;--code:#0a0f1a;
  --violet:#7c3aed;--violet-600:#6d28d9;--cyan:#22d3ee;--glow:rgba(124,58,237,.35)
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial;
  background:var(--bg);color:var(--text);line-height:1.8;font-size:18px;
  min-height:100vh;display:flex;flex-direction:column;
}
.bg-glow{position:fixed;inset:-20% -10% auto -10%;height:55vh;pointer-events:none;z-index:0;
  background:radial-gradient(60% 40% at 20% 40%, rgba(124,58,237,.18), transparent 60%),
             radial-gradient(50% 35% at 80% 20%, rgba(34,211,238,.12), transparent 60%);
  filter:blur(40px) saturate(120%)}
.container{max-width:1280px;margin:0 auto;padding:0 28px}
.main.wide.container{max-width:96%;min-width:1280px}
.row{display:flex;gap:16px}
.between{justify-content:space-between}
.center{align-items:center}
.gap{gap:10px}
.muted{color:var(--muted)}
.hidden{display:none}
.site-header{position:sticky;top:0;z-index:10;background:linear-gradient(180deg, rgba(10,15,26,.9), rgba(10,15,26,.6));backdrop-filter:blur(8px);border-bottom:1px solid var(--border)}
.site-header .container{height:68px}
.brand a{text-decoration:none;color:inherit}
.brand .logo{width:24px;height:24px}
.brand-name{font-weight:700;letter-spacing:.2px;text-decoration:none}
.nav-toggle{display:none;background:transparent;border:1px solid var(--border);color:var(--text);border-radius:10px;padding:6px 10px}
.nav a{color:var(--text);text-decoration:none;opacity:.85;margin-left:24px}
.nav a:hover{opacity:1}
.main{padding:24px 0;flex:1 0 auto}
.main.centered{display:grid;place-items:center;min-height:calc(100vh - 68px - 72px)}
.title{font-size:36px;letter-spacing:.2px;margin:0 0 10px 0}
.title.gradient{background:linear-gradient(90deg,#c7b8ff,#22d3ee);-webkit-background-clip:text;background-clip:text;color:transparent}
.auth .title{text-align:center;margin-bottom:6px}
.subtitle{margin:0 0 22px 0;color:var(--muted)}
.panel{position:relative;background:var(--panel);border:1px solid var(--border);border-radius:18px;padding:32px 26px;box-shadow:0 18px 56px rgba(0,0,0,.45);background-image:linear-gradient(180deg,var(--glass),transparent)}
.panel > * + *{margin-top:12px}
.auth{max-width:760px;margin:0 auto;width:100%}
.app{width:100%;max-width:none;margin:0;background:transparent;border:0;box-shadow:none;padding:0;border-radius:0}
.panel-surface{background:var(--elev);border:1px solid var(--border);border-radius:14px;padding:10px}
.pill{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--border);border-radius:999px;padding:6px 10px;background:var(--elev)}
.input,.select{width:100%;background:var(--elev);border:1px solid var(--border);border-radius:14px;padding:16px 18px;color:var(--text);outline:none;font-size:18px}
.input:focus,.select:focus{border-color:rgba(124,58,237,.5)}
.label{display:block;margin-bottom:10px;color:var(--muted);font-size:16px}
.login-form{max-width:560px;display:grid;grid-auto-flow:row;gap:12px}
.auth .login-form{margin:0 auto}
.auth .title + .login-form{margin-top:6px}
.btn{background:transparent;border:1px solid var(--border);color:var(--text);border-radius:12px;padding:14px 20px;cursor:pointer;font-weight:600;font-size:16px}
.btn[disabled]{opacity:.6;cursor:not-allowed}
.btn.primary{background:linear-gradient(135deg,var(--violet),var(--violet-600));border:none;color:#fff;box-shadow:0 8px 20px rgba(124,58,237,.25)}
.topbar{margin-bottom:12px}
.controls{display:grid;grid-template-columns:1fr;gap:12px;margin-bottom:12px}
@media (min-width:900px){
.controls{grid-template-columns:repeat(2,minmax(0,1fr))}
}
.chat{display:flex;flex-direction:column;gap:10px}
.chat-log{height:52vh;min-height:260px;overflow:auto;background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:10px}
.msg{display:flex;margin:8px 0}
.msg .bubble{max-width:85%;padding:10px 12px;border-radius:14px;border:1px solid var(--border);word-wrap:break-word;white-space:pre-wrap}
.msg.user{justify-content:flex-end}
.msg.user .bubble{background:var(--elev)}
.msg.assistant{justify-content:flex-start}
.msg.assistant .bubble{background:#0b1322;border-color:#182235}
.chat-input{display:flex;gap:8px;align-items:center}
.grow{flex:1 1 auto}
.error{color:#fca5a5;margin-top:8px;min-height:20px}
.site-footer{border-top:1px solid var(--border);margin-top:auto;padding:18px 0;background:linear-gradient(180deg, rgba(10,15,26,.0), rgba(10,15,26,.4))}
.copy-spinner{display:inline-block;width:16px;height:16px;border:2px solid rgba(255,255,255,.25);border-top-color:#fff;border-radius:50%;animation:spin .8s linear infinite;margin-left:8px}
@keyframes spin{to{transform:rotate(360deg)}}
/* Chat typing indicator */
.typing{display:inline-flex;gap:6px;margin-left:0;vertical-align:baseline}
.typing.has-content{margin-left:8px}
.typing .dot{display:inline-block;animation:chatDotsBlink 1.2s infinite ease-in-out;opacity:.3}
.typing .dot:nth-child(2){animation-delay:.2s}
.typing .dot:nth-child(3){animation-delay:.4s}
@keyframes chatDotsBlink{0%,20%{opacity:.25}50%{opacity:1}80%,100%{opacity:.25}}
/* Custom Dropdown */
.dropdown{position:relative;width:100%}
.dropdown-toggle{width:100%;background:var(--elev);border:1px solid var(--border);border-radius:14px;padding:16px 18px;color:var(--text);outline:none;font-size:18px;display:flex;align-items:center;justify-content:space-between;cursor:pointer}
.dropdown-toggle:focus{border-color:rgba(124,58,237,.5)}
.dropdown-toggle::after{content:"";width:0;height:0;border-left:6px solid transparent;border-right:6px solid transparent;border-top:7px solid var(--muted);margin-left:10px}
.dropdown-menu{position:absolute;left:0;right:0;top:calc(100% + 6px);background:var(--panel);border:1px solid var(--border);border-radius:12px;box-shadow:0 16px 50px rgba(0,0,0,.45);padding:8px;z-index:20}
.dropdown-search{padding:4px}
.dropdown-search .input{padding:12px 14px;font-size:16px}
.dropdown-list{list-style:none;margin:6px 0 0 0;padding:0;max-height:300px;overflow:auto}
.dropdown-item{padding:10px 12px;border-radius:10px;border:1px solid transparent;cursor:pointer;display:flex;align-items:center;justify-content:space-between;color:var(--text);flex-wrap:wrap;gap:6px}
.dropdown-item:hover,.dropdown-item.active{background:var(--elev);border-color:var(--border)}
.dropdown-item[aria-selected="true"]{background:#0b1322;border-color:#182235}
.thinking-dropdown{position:relative;width:100%}
.thinking-toggle{width:100%;border:1px solid var(--border);border-radius:14px;padding:14px 16px;background:var(--elev);color:var(--text);display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:17px;cursor:pointer;transition:border-color .2s,box-shadow .2s,background .2s}
.thinking-toggle.active{border-color:rgba(124,58,237,.6);box-shadow:0 0 0 1px rgba(124,58,237,.35),0 8px 24px rgba(124,58,237,.18)}
.thinking-toggle-content{display:flex;flex-direction:column;align-items:flex-start;gap:6px}
.thinking-label{font-weight:600;letter-spacing:.2px}
.thinking-chip{font-size:12px;padding:2px 8px;border-radius:999px;background:rgba(124,58,237,.18);border:1px solid rgba(124,58,237,.4);text-transform:uppercase;letter-spacing:.3px}
.thinking-caret{width:0;height:0;border-left:6px solid transparent;border-right:6px solid transparent;border-top:7px solid var(--muted);transition:transform .2s}
.thinking-toggle[aria-expanded="true"] .thinking-caret{transform:rotate(180deg)}
.thinking-menu{position:absolute;top:calc(100% + 6px);left:0;right:0;background:var(--panel);border:1px solid var(--border);border-radius:14px;box-shadow:0 18px 50px rgba(0,0,0,.55);padding:6px;z-index:25;opacity:0;transform:translateY(-6px);transition:opacity .18s ease,transform .18s ease}
.thinking-menu.open{opacity:1;transform:translateY(0)}
.thinking-list{list-style:none;margin:0;padding:4px 0;display:flex;flex-direction:column;gap:6px}
.thinking-item{padding:10px 12px;border-radius:12px;border:1px solid transparent;background:transparent;color:var(--text);display:flex;flex-direction:column;gap:4px;cursor:pointer;transition:background .15s,border-color .15s}
.thinking-item:hover,.thinking-item.active{background:var(--elev);border-color:rgba(124,58,237,.35)}
.thinking-item .title{font-weight:600;font-size:15px}
.thinking-item .desc{font-size:13px;color:var(--muted)}
.model-name{flex:1 1 auto;min-width:200px;font-weight:500}
.model-caps{display:flex;gap:4px;flex-wrap:wrap}
.cap-badge{display:inline-block;padding:2px 6px;border-radius:6px;font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.3px;border:1px solid transparent}
.cap-badge.cap-chat{background:rgba(124,58,237,.15);border-color:rgba(124,58,237,.3);color:#c7b8ff}
.cap-badge.cap-audio{background:rgba(34,211,238,.15);border-color:rgba(34,211,238,.3);color:#22d3ee}
.cap-badge.cap-vision{background:rgba(251,191,36,.15);border-color:rgba(251,191,36,.3);color:#fbbf24}
.cap-badge.cap-reasoning{background:rgba(236,72,153,.15);border-color:rgba(236,72,153,.3);color:#ec4899}
.cap-badge.cap-guard{background:rgba(239,68,68,.15);border-color:rgba(239,68,68,.3);color:#ef4444}
.cap-badge.cap-thinking{background:rgba(14,165,233,.18);border-color:rgba(14,165,233,.35);color:#7dd3fc}
.cap-badge.cap-image{background:rgba(59,130,246,.18);border-color:rgba(59,130,246,.35);color:#93c5fd}
.cap-badge.cap-music{background:rgba(249,115,22,.18);border-color:rgba(249,115,22,.35);color:#fdba74}
.model-pricing{font-size:12px;color:var(--muted);opacity:.8;white-space:nowrap}
@media (max-width:720px){
  body{font-size:16px;line-height:1.7}
  .nav-toggle{display:inline-block}
  .nav{display:none;position:fixed;top:64px;right:16px;left:16px;background:var(--panel);border:1px solid var(--border);border-radius:14px;padding:10px;box-shadow:0 16px 50px rgba(0,0,0,.45)}
  .nav a{display:block;margin:6px 0;padding:8px 10px;border-radius:10px;border:1px solid transparent}
  .nav a:hover{background:var(--elev);border-color:var(--border)}
  .site-header.open .nav{display:block}
  .title{font-size:30px}
  .chat-log{height:48vh}
}