*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}

:root{
  --bg:#101010;
  --bg2:#181818;
  --bg3:#222;
  --bg4:#2a2a2a;
  --border:#2c2c2c;
  --tx:#e2e2e2;
  --tx2:#999;
  --tx3:#5a5a5a;
  --ac:#7c6aff;
  --ac2:#6554e0;
  --r:8px;
  --f:'Inter',system-ui,sans-serif;
  --mono:'IBM Plex Mono',monospace;
}

html,body{height:100%;overflow:hidden}
body{font-family:var(--f);background:var(--bg);color:var(--tx);line-height:1.5;-webkit-font-smoothing:antialiased}
a{color:var(--ac);text-decoration:none}
a:hover{text-decoration:underline}
button{cursor:pointer;border:0;background:0;font:inherit;color:inherit}
input,textarea{font:inherit;color:inherit;background:0;border:0;outline:0}
.hide{display:none!important}

::-webkit-scrollbar{width:4px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--border);border-radius:9px}

/* ─── KEY SCREEN ─── */
#key-screen{height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}
.key-box{text-align:center;max-width:380px;width:100%;animation:fadeIn .4s ease}
@keyframes fadeIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
.key-box h1{font-size:26px;font-weight:700;margin-bottom:6px;letter-spacing:-.5px}
.key-box>p{color:var(--tx2);font-size:14px;margin-bottom:24px}
.key-row{display:flex;gap:6px;margin-bottom:12px}
.key-row input{flex:1;padding:10px 14px;background:var(--bg2);border:1px solid var(--border);border-radius:var(--r);font-family:var(--mono);font-size:13px;transition:border .15s}
.key-row input:focus{border-color:var(--ac)}
.key-row input::placeholder{color:var(--tx3)}
#key-go{padding:10px 20px;background:var(--ac);color:#fff;border-radius:var(--r);font-weight:600;font-size:15px;transition:background .15s}
#key-go:hover{background:var(--ac2)}
.key-box small{display:block;color:var(--tx3);font-size:11px}
.key-box small a{color:var(--tx2)}

/* ─── NAV ─── */
#nav{display:flex;align-items:center;justify-content:space-between;padding:10px 16px;background:var(--bg);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:10}
.nav-title{font-size:15px;font-weight:600;letter-spacing:-.3px}
.nav-right{display:flex;gap:4px}
.nav-btn{width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:6px;color:var(--tx2);transition:background .12s,color .12s}
.nav-btn:hover{background:var(--bg3);color:var(--tx)}

/* ─── SIDEBAR (RIGHT) ─── */
.side{position:fixed;right:0;top:0;bottom:0;width:280px;background:var(--bg2);border-left:1px solid var(--border);display:flex;flex-direction:column;z-index:50;transform:translateX(100%);transition:transform .2s ease}
.side.open{transform:translateX(0)}
.side-head{display:flex;align-items:center;justify-content:space-between;padding:14px 14px 8px;font-size:13px;font-weight:600;color:var(--tx2);text-transform:uppercase;letter-spacing:.5px}
#side-search{margin:0 10px 6px;padding:7px 10px;background:var(--bg3);border-radius:6px;font-size:12px}
#side-search::placeholder{color:var(--tx3)}
#side-list{flex:1;overflow-y:auto;padding:2px 6px}

.ch-item{padding:8px 10px;border-radius:6px;cursor:pointer;font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:var(--tx2);transition:background .12s;display:flex;align-items:center;justify-content:space-between;margin-bottom:1px}
.ch-item:hover{background:var(--bg3)}
.ch-item.on{background:var(--bg4);color:var(--tx)}
.ch-item .ch-del{opacity:0;color:var(--tx3);font-size:16px;padding:0 4px;transition:opacity .12s;flex-shrink:0}
.ch-item:hover .ch-del{opacity:1}
.ch-item .ch-del:hover{color:#f66}
.ch-name{overflow:hidden;text-overflow:ellipsis}

.side-foot{padding:10px 14px;border-top:1px solid var(--border)}
#btn-edit-key{font-size:12px;color:var(--tx3);padding:4px 0;transition:color .15s}
#btn-edit-key:hover{color:var(--tx2)}

.overlay{position:fixed;inset:0;background:rgba(0,0,0,.55);z-index:40}

/* ─── MODAL ─── */
.modal-bg{position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:60;display:flex;align-items:center;justify-content:center;padding:20px}
.modal{background:var(--bg2);border:1px solid var(--border);border-radius:12px;padding:20px;width:100%;max-width:380px}
.modal-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px;font-size:14px;font-weight:600}
.modal input{width:100%;padding:10px 12px;background:var(--bg3);border:1px solid var(--border);border-radius:var(--r);font-family:var(--mono);font-size:13px;margin-bottom:14px;transition:border .15s}
.modal input:focus{border-color:var(--ac)}
.modal input::placeholder{color:var(--tx3)}
.modal-actions{display:flex;gap:8px}
.btn-accent{flex:1;padding:9px 0;background:var(--ac);color:#fff;border-radius:var(--r);font-size:13px;font-weight:600;transition:background .15s}
.btn-accent:hover{background:var(--ac2)}
.btn-danger{flex:1;padding:9px 0;background:rgba(255,80,80,.1);color:#f66;border:1px solid rgba(255,80,80,.2);border-radius:var(--r);font-size:13px;font-weight:500;transition:all .15s}
.btn-danger:hover{background:rgba(255,80,80,.18)}

/* ─── MAIN ─── */
#main{display:flex;flex-direction:column;height:calc(100vh - 49px);min-width:0}

.welcome{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:40px 20px;animation:fadeIn .35s ease}
.welcome h2{font-size:20px;font-weight:600;margin-bottom:20px;color:var(--tx2)}
.chips{display:flex;gap:6px;flex-wrap:wrap;justify-content:center}
.chips button{padding:8px 16px;background:var(--bg2);border:1px solid var(--border);border-radius:20px;font-size:13px;color:var(--tx2);transition:all .12s}
.chips button:hover{border-color:var(--tx3);color:var(--tx)}

/* ─── MESSAGES ─── */
.msgs{flex:1;overflow-y:auto;padding:16px 0 8px}

.msg{padding:8px 0;animation:msgIn .3s ease}
@keyframes msgIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}

/* streaming cursor */
.msg.streaming .msg-txt::after{content:'';display:inline-block;width:2px;height:14px;background:var(--ac);margin-left:3px;vertical-align:text-bottom;animation:blink .6s step-end infinite}
@keyframes blink{50%{opacity:0}}

.msg-in{max-width:680px;margin:0 auto;padding:0 20px;display:flex;gap:12px}
.msg-av{width:26px;height:26px;border-radius:6px;display:flex;align-items:center;justify-content:center;font-size:12px;flex-shrink:0;margin-top:2px;background:var(--bg3)}
.msg.bot .msg-av{background:var(--ac);color:#fff;font-weight:700;font-size:11px}
.msg-body{min-width:0;flex:1}
.msg-who{font-size:11px;font-weight:600;color:var(--tx3);text-transform:uppercase;letter-spacing:.4px;margin-bottom:3px}
.msg-txt{font-size:14px;line-height:1.65;word-break:break-word}
.msg-txt p{margin-bottom:8px}
.msg-txt p:last-child{margin-bottom:0}

/* code */
.msg-txt pre{background:var(--bg2);border:1px solid var(--border);border-radius:6px;padding:12px 14px;overflow-x:auto;margin:8px 0;font-family:var(--mono);font-size:12.5px;line-height:1.55;position:relative}
.msg-txt code{font-family:var(--mono);font-size:12.5px}
.msg-txt :not(pre)>code{background:var(--bg3);padding:1px 5px;border-radius:3px;font-size:12px}
.cp-btn{position:absolute;top:6px;right:6px;padding:3px 8px;background:var(--bg3);border:1px solid var(--border);border-radius:4px;font-size:10px;color:var(--tx3);opacity:0;transition:opacity .12s;cursor:pointer}
.msg-txt pre:hover .cp-btn{opacity:1}
.cp-btn:hover{color:var(--tx2)}

/* markdown misc */
.msg-txt ul,.msg-txt ol{padding-left:18px;margin:6px 0}
.msg-txt li{margin-bottom:3px}
.msg-txt blockquote{border-left:2px solid var(--ac);padding-left:12px;color:var(--tx2);margin:8px 0}
.msg-txt h1,.msg-txt h2,.msg-txt h3{margin:12px 0 6px;font-weight:600}
.msg-txt h1{font-size:18px}
.msg-txt h2{font-size:16px}
.msg-txt h3{font-size:14px}
.msg-txt hr{border:0;border-top:1px solid var(--border);margin:12px 0}
.msg-txt strong{font-weight:600}
.msg-txt table{border-collapse:collapse;margin:8px 0;width:100%;font-size:13px}
.msg-txt th,.msg-txt td{border:1px solid var(--border);padding:6px 10px;text-align:left}
.msg-txt th{background:var(--bg3);font-weight:600}
.msg-txt a{color:var(--ac);text-decoration:underline;text-underline-offset:2px}

/* typing dots */
.dots{display:inline-flex;gap:4px;padding:4px 0}
.dots span{width:5px;height:5px;background:var(--tx3);border-radius:50%;animation:dot .7s ease-in-out infinite}
.dots span:nth-child(2){animation-delay:.12s}
.dots span:nth-child(3){animation-delay:.24s}
@keyframes dot{0%,60%,100%{opacity:.25;transform:scale(.8)}30%{opacity:1;transform:scale(1)}}

.stop-row{text-align:center;padding:4px 0}
.btn-stop{padding:5px 14px;background:var(--bg3);border:1px solid var(--border);border-radius:6px;font-size:11px;color:var(--tx2);transition:all .12s}
.btn-stop:hover{border-color:var(--tx3)}
.btn-stop .sq{display:inline-block;width:8px;height:8px;background:#f66;border-radius:2px;margin-right:5px;vertical-align:middle}

.msg-err{color:#f66;font-size:13px;padding:6px 10px;background:rgba(255,80,80,.08);border:1px solid rgba(255,80,80,.14);border-radius:6px}

/* ─── INPUT ─── */
.input-box{padding:0 20px 14px}
.input-row{max-width:680px;margin:0 auto;display:flex;align-items:flex-end;gap:6px;background:var(--bg2);border:1px solid var(--border);border-radius:var(--r);padding:6px 6px 6px 14px;transition:border .15s}
.input-row:focus-within{border-color:#444}
#inp{flex:1;resize:none;font-size:14px;line-height:1.45;max-height:160px;padding:5px 0}
#inp::placeholder{color:var(--tx3)}
#btn-send{width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:6px;background:var(--ac);color:#fff;flex-shrink:0;transition:all .12s}
#btn-send:disabled{background:var(--bg3);color:var(--tx3);cursor:not-allowed}
#btn-send:not(:disabled):hover{background:var(--ac2)}

/* ─── FOOTER ─── */
footer{text-align:center;padding:4px 0 6px;font-size:10px;color:var(--tx3);pointer-events:none;flex-shrink:0}
footer a{color:var(--tx3);pointer-events:auto;transition:color .15s}
footer a:hover{color:var(--tx2)}

/* ─── RESPONSIVE ─── */
@media(max-width:640px){
  .side{width:100%}
  .chips{flex-direction:column;width:100%}
  .chips button{width:100%}
  .msg-in{padding:0 14px}
  .input-box{padding:0 10px 10px}
}