/* ===== Nyx app — flat neutral redesign (no gradients, no purple) ===== */
:root{
  --bg:#ffffff; --panel:#fafafb; --elev:#ffffff; --elev2:#f4f4f6;
  --ink:#101014; --muted:#5f5f6b; --faint:#9a9aa6;
  --line:#e7e7ee; --line2:#eef0f4;
  --pri:#101014; --pri-ink:#ffffff;
  --focus:#3f6fff; --ok:#12b886; --warn:#f59f00; --bad:#e5484d;
  --shadow:0 1px 2px rgba(16,24,40,.04),0 8px 24px rgba(16,24,40,.06);
  --radius:14px; --side:280px; --topbar:52px;
  font-synthesis:none;
}
[data-theme="dark"]{
  --bg:#0a0a0c; --panel:#0e0e13; --elev:#15151c; --elev2:#1b1b24;
  --ink:#f4f4f6; --muted:#9a9aa6; --faint:#62626e;
  --line:#22222c; --line2:#1a1a22;
  --pri:#f4f4f6; --pri-ink:#0a0a0c;
  --focus:#5a82ff; --ok:#25d0a4; --warn:#f5a524; --bad:#ff6b6b;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 10px 30px rgba(0,0,0,.35);
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--ink);
  font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased;display:flex;overflow:hidden}
button{font-family:inherit;cursor:pointer;color:inherit}
::-webkit-scrollbar{width:9px;height:9px}
::-webkit-scrollbar-thumb{background:var(--line);border-radius:20px}
::-webkit-scrollbar-thumb:hover{background:var(--faint)}

/* ===== SIDEBAR ===== */
.side{width:var(--side);flex:0 0 var(--side);height:100vh;border-right:1px solid var(--line);
  display:flex;flex-direction:column;background:var(--panel);transition:margin .22s ease}
.side .brand{display:flex;align-items:center;gap:10px;padding:16px 18px 12px;font-weight:700;font-size:17px;letter-spacing:-.02em}
.side .brand .logo,.side .brand .nyx-logo{width:26px;height:26px;border-radius:8px;display:block;background:transparent}
.newchat{margin:2px 12px 10px;display:flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 12px;border:0;border-radius:11px;background:var(--pri);color:var(--pri-ink);font-weight:600;font-size:14px;
  transition:transform .12s,opacity .12s}
.newchat:hover{opacity:.9;transform:translateY(-1px)}
.chats{flex:1;overflow-y:auto;padding:4px 8px 8px}
.chat-item{position:relative;display:flex;align-items:center;gap:9px;padding:9px 11px;border-radius:10px;color:var(--muted);
  font-size:13.5px;font-weight:500;cursor:pointer;margin-bottom:2px;transition:.12s;border:1px solid transparent}
.chat-item .ic{display:none}
.chat-item .tt{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.chat-item .del{opacity:0;font-size:15px;line-height:1;padding:2px 6px;border-radius:6px;color:var(--faint)}
.chat-item:hover{background:var(--elev2);color:var(--ink)}
.chat-item:hover .del{opacity:.7}
.chat-item .del:hover{color:var(--bad);opacity:1}
.chat-item.active{background:var(--elev2);color:var(--ink);font-weight:600}
.chat-item.active::before{content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;border-radius:3px;background:var(--ink)}
.side .foot{padding:10px 16px;font-size:12px;color:var(--faint);display:flex;align-items:center;gap:8px}
.dotlive{width:7px;height:7px;border-radius:50%;background:var(--ok)}

/* ===== MAIN ===== */
.main{flex:1;height:100vh;display:flex;flex-direction:column;min-width:0;position:relative;background:var(--bg)}
.topbar{height:var(--topbar);flex:0 0 var(--topbar);border-bottom:1px solid var(--line);display:flex;align-items:center;gap:10px;padding:0 16px;background:var(--bg)}
.topbar .burger{display:none;border:1px solid var(--line);background:var(--elev);border-radius:9px;width:36px;height:36px;font-size:17px}
.topbar .title{font-weight:600;letter-spacing:-.01em;font-size:15px;flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.badge{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;color:var(--muted);background:var(--elev2);padding:6px 10px;border-radius:9px;border:1px solid var(--line)}
.badge b{color:var(--ink);font-weight:600}
.bdot{width:7px;height:7px;border-radius:50%;background:var(--faint);flex:none}
.bdot.on{background:var(--ok)} .bdot.warn{background:var(--warn)} .bdot.off{background:var(--faint)}
.langsel{height:34px;border-radius:9px;border:1px solid var(--line);background:var(--elev);color:var(--ink);padding:0 9px;font:inherit;font-size:13px;cursor:pointer}
.theme-toggle{width:36px;height:36px;flex:0 0 36px;border-radius:10px;border:1px solid var(--line);background:var(--elev);color:var(--ink);display:grid;place-items:center;transition:.18s}
.theme-toggle:hover{border-color:var(--focus)}
.tt{width:19px;height:19px}

.scroll{flex:1;overflow-y:auto;scroll-behavior:smooth}
.thread{max-width:780px;margin:0 auto;padding:26px 24px 150px}

/* empty state */
.empty{max-width:640px;margin:0 auto;padding:9vh 24px 0;text-align:center;animation:rise .45s ease}
.empty .hi{width:56px;height:56px;border-radius:16px;background:var(--elev2);border:1px solid var(--line);display:grid;place-items:center;margin:0 auto 18px;overflow:hidden}
.empty .hi img{width:34px;height:34px;display:block}
.empty h1{font-size:26px;letter-spacing:-.03em;margin:0 0 8px;font-weight:700}
.empty p{color:var(--muted);font-size:15px;margin:0 auto 26px;max-width:460px;line-height:1.55}
.quick{display:flex;flex-direction:column;gap:10px;max-width:480px;margin:0 auto}
.qbtn{display:flex;align-items:center;gap:13px;padding:14px 16px;border-radius:12px;border:1px solid var(--line);
  background:var(--elev);text-align:left;font-size:14px;font-weight:600;color:var(--ink);transition:.15s}
.qbtn .qi{width:36px;height:36px;border-radius:9px;background:var(--elev2);border:1px solid var(--line);display:grid;place-items:center;font-size:17px;flex:0 0 36px}
.qbtn .qs{display:block;font-weight:450;font-size:12px;color:var(--muted);margin-top:2px}
.qbtn:hover{border-color:var(--focus);transform:translateY(-1px)}

/* messages */
.msg{display:flex;gap:11px;margin-bottom:18px;animation:rise .3s ease}
.msg .av{width:30px;height:30px;border-radius:8px;flex:0 0 30px;display:grid;place-items:center;font-size:14px;overflow:hidden;border:1px solid var(--line)}
.msg .av img{width:20px;height:20px}
.msg.you .av{background:var(--pri);color:var(--pri-ink);border-color:transparent}
.msg.bot .av{background:var(--elev2)}
.bubble{padding:12px 15px;border-radius:13px;font-size:14.5px;line-height:1.55;max-width:100%;white-space:pre-wrap;word-wrap:break-word}
.msg.you{flex-direction:row-reverse}
.msg.you .bubble{background:var(--pri);color:var(--pri-ink);border-bottom-right-radius:4px}
.msg.bot .bubble{background:var(--elev);border:1px solid var(--line);border-bottom-left-radius:4px}
.bubble a{color:var(--focus)}
.src{display:block;margin-top:8px;font-size:11.5px;color:var(--muted)}
.modepill{display:inline-block;margin-top:8px;font-size:11px;font-weight:600;color:var(--muted);background:var(--elev2);padding:3px 9px;border-radius:20px;border:1px solid var(--line)}
.actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
.act{border:1px solid var(--line);background:var(--elev);border-radius:10px;padding:8px 13px;font-size:13px;font-weight:600;color:var(--ink);transition:.14s}
.act:hover{border-color:var(--focus)}
.act.primary{background:var(--pri);color:var(--pri-ink);border-color:transparent}
.act.primary:hover{opacity:.9}
.act.danger{border-color:transparent;color:var(--bad);background:color-mix(in srgb,var(--bad) 12%,transparent)}

/* typing */
.typing{display:inline-flex;gap:5px;padding:13px 15px;background:var(--elev);border:1px solid var(--line);border-radius:13px}
.typing i{width:6px;height:6px;border-radius:50%;background:var(--faint);animation:bounce 1.2s infinite}
.typing i:nth-child(2){animation-delay:.18s}.typing i:nth-child(3){animation-delay:.36s}

/* widgets */
.widgets{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin-top:6px}
.wcard{border:1px solid var(--line);border-radius:13px;padding:14px;background:var(--elev)}
.wcard h4{margin:0 0 4px;font-size:12px;color:var(--muted);font-weight:600;text-transform:uppercase;letter-spacing:.04em}
.wcard .big{font-size:18px;font-weight:700}
.donut{display:flex;align-items:center;gap:12px}.donut svg{flex:0 0 64px}
.spec-row{display:flex;justify-content:space-between;gap:10px;padding:7px 0;border-bottom:1px solid var(--line2);font-size:13px}
.spec-row:last-child{border-bottom:0}.spec-row b{font-weight:600}
.spec-row span{color:var(--muted);text-align:right}
.warnbox{margin-top:10px;border:1px solid color-mix(in srgb,var(--warn) 40%,var(--line));background:color-mix(in srgb,var(--warn) 10%,transparent);border-radius:11px;padding:12px;font-size:13px;color:var(--warn)}
.okbox{margin-top:10px;border:1px solid color-mix(in srgb,var(--ok) 40%,var(--line));background:color-mix(in srgb,var(--ok) 10%,transparent);border-radius:11px;padding:12px;font-size:13px;color:var(--ok)}

/* composer */
.composer{position:absolute;left:0;right:0;bottom:0;padding:14px 24px 26px;
  background:linear-gradient(180deg,transparent,var(--bg) 34%)}
.composer .box{max-width:780px;margin:0 auto;display:flex;align-items:flex-end;gap:9px;border:1px solid var(--line);
  border-radius:16px;padding:7px 7px 7px 15px;background:var(--elev);box-shadow:var(--shadow);transition:.16s}
.composer .box:focus-within{border-color:var(--focus);box-shadow:0 0 0 3px color-mix(in srgb,var(--focus) 22%,transparent)}
.composer textarea{flex:1;border:0;outline:0;resize:none;font:inherit;font-size:14.5px;max-height:150px;padding:9px 0;background:transparent;color:var(--ink)}
.composer textarea::placeholder{color:var(--faint)}
.send{width:38px;height:38px;flex:0 0 38px;border:0;border-radius:11px;background:var(--pri);color:var(--pri-ink);display:grid;place-items:center;transition:.14s}
.send svg{width:17px;height:17px}
.send:hover{opacity:.9;transform:translateY(-1px)}
.send:disabled{opacity:.35;cursor:default;transform:none}
.hint{max-width:780px;margin:8px auto 0;text-align:center;font-size:11px;color:var(--faint)}

/* mobile overlay */
.scrim{display:none;position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:30}

@keyframes rise{from{opacity:0;transform:translateY(7px)}to{opacity:1;transform:none}}
@keyframes bounce{0%,60%,100%{transform:translateY(0)}30%{transform:translateY(-5px)}}

@media(max-width:820px){
  .side{position:fixed;z-index:40;margin-left:calc(var(--side)*-1);box-shadow:var(--shadow)}
  .side.open{margin-left:0}
  .scrim.show{display:block}
  .topbar .burger{display:grid;place-items:center}
  .empty h1{font-size:22px}
}

/* font-size + density (settings) */
[data-fontsize="s"] .bubble{font-size:13px}
[data-fontsize="l"] .bubble{font-size:16.5px}
[data-fontsize="s"]{--radius:12px}
[data-density="compact"] .msg{margin-bottom:10px}
[data-density="compact"] .bubble{padding:9px 13px}