:root{
  --bg:#0b0c10;--surface:#13151b;--surface2:#1a1d25;--line:#252934;--txt:#eceef3;--dim:#8a91a2;
  --acc:#7c6cff;--acc2:#4cc9f0;--user:#232640;--danger:#ff6b81;--radius:2px;
}
@media(prefers-color-scheme:light){:root{
  --bg:#f5f6fa;--surface:#fff;--surface2:#eef0f6;--line:#e1e4ee;--txt:#171923;--dim:#6b7285;--user:#e9e7ff;}}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--txt);font:15px/1.6 Inter,system-ui,-apple-system,"Segoe UI",sans-serif;-webkit-font-smoothing:antialiased}
[hidden]{display:none!important}
button,input,select,textarea{font:inherit;color:inherit}
.dim{color:var(--dim)}.err{color:var(--danger);min-height:1.2em;margin:.2em 0;font-size:13px}
input,select,textarea{background:var(--surface2);border:1px solid var(--line);border-radius:2px;padding:10px 12px;outline:none;transition:border-color .15s,box-shadow .15s}
input:focus,select:focus,textarea:focus{border-color:var(--acc);box-shadow:0 0 0 3px color-mix(in srgb,var(--acc) 25%,transparent)}
button{border:1px solid var(--line);background:var(--surface2);border-radius:2px;padding:9px 14px;cursor:pointer;transition:transform .1s,filter .15s,background .15s}
button:hover{filter:brightness(1.12)}button:active{transform:scale(.97)}
button.primary{background:linear-gradient(135deg,var(--acc),#5b8cff);border:0;color:#fff;font-weight:600}
button.ghost{background:transparent;border-color:transparent}button.ghost:hover{background:var(--surface2)}
button.danger{color:var(--danger)}button.wide{width:100%}button.icon{padding:6px 10px;font-size:18px}
.logo{width:52px;height:52px;border-radius:4px;background:linear-gradient(135deg,var(--acc),var(--acc2));box-shadow:0 8px 30px color-mix(in srgb,var(--acc) 45%,transparent);position:relative}
.logo::after{content:"";position:absolute;inset:36%;border-radius:2px;background:#fff}
.logo.sm{width:28px;height:28px;border-radius:2px;box-shadow:none}

/* connexion */
#login{min-height:100%;display:grid;place-items:center;padding:20px;
  background:radial-gradient(600px 400px at 20% 10%,color-mix(in srgb,var(--acc) 22%,transparent),transparent),
             radial-gradient(500px 400px at 90% 90%,color-mix(in srgb,var(--acc2) 18%,transparent),transparent),var(--bg)}
.card{width:100%;max-width:370px;background:color-mix(in srgb,var(--surface) 88%,transparent);backdrop-filter:blur(14px);
  border:1px solid var(--line);border-radius:2px;padding:32px;display:flex;flex-direction:column;gap:12px;box-shadow:0 20px 60px #0006}
.card h1{margin:10px 0 0;font-size:24px}.card p{margin:0}

/* app */
#app{height:100dvh;display:flex}
#side{width:272px;background:var(--surface);border-right:1px solid var(--line);display:flex;flex-direction:column;padding:14px;gap:12px;flex-shrink:0}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:16px;padding:2px 4px}
#list{flex:1;overflow:auto;display:flex;flex-direction:column;gap:2px;margin:0 -6px;padding:0 6px}
.conv{display:flex;align-items:center;gap:6px;padding:8px 10px;border-radius:2px;cursor:pointer;color:var(--dim)}
.conv span{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.conv:hover{background:var(--surface2);color:var(--txt)}
.conv.on{background:color-mix(in srgb,var(--acc) 18%,transparent);color:var(--txt)}
.conv b{opacity:0;font-weight:400;padding:0 4px;border-radius:2px}.conv:hover b{opacity:.7}.conv b:hover{opacity:1;color:var(--danger)}
.me{border-top:1px solid var(--line);padding-top:10px}
.me button{width:100%;display:flex;align-items:center;gap:10px;justify-content:flex-start}
.avatar{width:28px;height:28px;border-radius:2px;background:linear-gradient(135deg,var(--acc),var(--acc2));display:grid;place-items:center;font-weight:700;font-size:13px;color:#fff;text-transform:uppercase}
main{flex:1;display:flex;flex-direction:column;min-width:0}
header{display:flex;align-items:center;gap:8px;padding:10px 16px;border-bottom:1px solid var(--line);background:color-mix(in srgb,var(--bg) 80%,transparent);backdrop-filter:blur(10px)}
header{display:none}#burger{display:block}
.opts{max-width:780px;margin:6px auto 0;display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.opts select{padding:1px 4px;font-size:12px;line-height:1.4;background:transparent;border:1px solid transparent;color:var(--dim);cursor:pointer}
.opts select:hover,.opts select:focus{border-color:var(--line);color:var(--txt);box-shadow:none}
.opts select option{background:var(--surface);color:var(--txt)}
#think{color:var(--acc2)!important}
#msgs{flex:1;overflow:auto;padding:24px 16px;scroll-behavior:smooth}
#wrap{max-width:780px;margin:0 auto;display:flex;flex-direction:column;gap:22px}
.m{animation:in .25s ease both;word-wrap:break-word;min-width:0}
@keyframes in{from{opacity:0;transform:translateY(6px)}}
.m.user{align-self:flex-end;max-width:85%;background:var(--user);padding:10px 16px;border-radius:2px;white-space:pre-wrap}
.m.assistant{display:flex;gap:12px}
.m.assistant .ico{width:28px;height:28px;border-radius:2px;flex-shrink:0;background:linear-gradient(135deg,var(--acc),var(--acc2));margin-top:2px}
.m .body{flex:1;min-width:0}
.body>*:first-child{margin-top:0}.body>*:last-child{margin-bottom:0}
.body p{margin:.6em 0}.body ul,.body ol{padding-left:1.4em;margin:.6em 0}
.body h1,.body h2,.body h3{margin:1em 0 .4em;line-height:1.3}.body h1{font-size:1.3em}.body h2{font-size:1.15em}.body h3{font-size:1.05em}
.body a{color:var(--acc2)}.body blockquote{margin:.6em 0;padding:.1em 1em;border-left:3px solid var(--acc);color:var(--dim)}
.body code{font:13px ui-monospace,SFMono-Regular,Menlo,monospace;background:var(--surface2);padding:2px 6px;border-radius:2px}
.body table{border-collapse:collapse;display:block;overflow:auto}.body th,.body td{border:1px solid var(--line);padding:6px 10px}
.codewrap{position:relative;margin:.8em 0;border:1px solid var(--line);border-radius:2px;overflow:hidden;background:var(--surface)}
.codewrap .bar{display:flex;justify-content:space-between;align-items:center;padding:4px 8px 4px 14px;background:var(--surface2);font-size:12px;color:var(--dim)}
.codewrap .bar button{padding:2px 10px;font-size:12px}
.codewrap pre{margin:0;padding:12px 14px;overflow:auto}.codewrap pre code{background:none;padding:0}
details.think{color:var(--dim);font-size:13px;margin-bottom:8px;border-left:2px solid var(--line);padding-left:12px}
details.think summary{cursor:pointer;user-select:none}details.think div{white-space:pre-wrap;margin-top:6px}
.typing::after{content:"▍";animation:blink 1s steps(2) infinite;color:var(--acc)}@keyframes blink{50%{opacity:0}}
.empty{text-align:center;margin-top:18vh}.empty .logo{margin:0 auto 18px}.empty h2{margin:0 0 6px;font-size:22px}
form#f{padding:8px 16px calc(10px + env(safe-area-inset-bottom))}
.composer{max-width:780px;margin:0 auto;display:flex;gap:8px;align-items:flex-end;background:var(--surface);border:1px solid var(--line);border-radius:2px;padding:8px 8px 8px 16px;box-shadow:0 8px 30px #0003}
.composer:focus-within{border-color:var(--acc)}
.composer textarea{flex:1;resize:none;border:0;background:transparent;box-shadow:none!important;padding:8px 0;max-height:200px}
.round{width:38px;height:38px;border-radius:2px;padding:0;font-size:18px}
.hint{font-size:11px;margin-left:auto}

/* dialogue */
dialog{border:1px solid var(--line);border-radius:2px;background:var(--surface);color:var(--txt);padding:24px;width:min(440px,calc(100vw - 32px));box-shadow:0 30px 80px #0008}
dialog::backdrop{background:#0009;backdrop-filter:blur(3px)}
dialog h2{margin:0 0 4px}dialog h3{margin:18px 0 8px;font-size:13px;color:var(--dim);text-transform:uppercase;letter-spacing:.06em}
dialog form{display:flex;flex-direction:column;gap:8px}
.urow{display:flex;align-items:center;gap:8px;padding:6px 0;border-bottom:1px solid var(--line)}
.urow span{flex:1}.urow small{color:var(--acc2)}.urow button{padding:3px 10px}
.chk{display:flex;gap:8px;align-items:center;color:var(--dim)}.chk input{padding:0}
.row-end{display:flex;justify-content:space-between;margin-top:18px}

@media(max-width:760px){
  #side{position:fixed;inset:0 auto 0 0;z-index:20;transform:translateX(-100%);transition:transform .25s;box-shadow:10px 0 40px #0008}
  #side.open{transform:none}
  #scrim{position:fixed;inset:0;background:#0007;z-index:10;display:none}#side.open+#scrim{display:block}
  header{display:flex;padding:6px 10px}
  .hint{display:none}
}