:root{
  --bg:#0f1115; --bg-2:#151821; --bg-3:#1c2029; --line:#262b36;
  --fg:#e6e8ee; --fg-dim:#9aa3b2; --fg-faint:#6b7484;
  --accent:#5b8cff; --accent-2:#7c5cff;
  --ok:#3fb950; --warn:#d29922; --crit:#f85149;
  --radius:12px; --radius-sm:8px;
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,monospace;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",sans-serif;
  color-scheme:dark;
}
:root[data-theme="light"]{
  --bg:#f7f8fa; --bg-2:#fff; --bg-3:#eef0f4; --line:#dfe3ea;
  --fg:#1a1d24; --fg-dim:#5a6474; --fg-faint:#8b95a5;
  color-scheme:light;
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:14px/1.55 var(--sans);
     -webkit-font-smoothing:antialiased}
button,input,textarea{font:inherit;color:inherit}
[hidden]{display:none!important}

/* ---------------------------------------------------------- Login */
.login-wrap{min-height:100dvh;display:grid;place-items:center;padding:24px;
  background:radial-gradient(1200px 600px at 50% -10%,rgba(91,140,255,.12),transparent 60%)}
.login-card{width:min(380px,100%);background:var(--bg-2);border:1px solid var(--line);
  border-radius:16px;padding:28px;display:flex;flex-direction:column;gap:6px;
  box-shadow:0 20px 60px rgba(0,0,0,.35)}
.login-brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:650}
.login-sub{margin:2px 0 18px;color:var(--fg-dim);font-size:13px}
.login-card label{font-size:12px;color:var(--fg-dim);margin-top:10px}
.login-card input{background:var(--bg-3);border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:10px 12px;outline:none;transition:border-color .15s}
.login-card input:focus{border-color:var(--accent)}
.login-card button{margin-top:20px;background:linear-gradient(135deg,var(--accent),var(--accent-2));
  border:0;border-radius:var(--radius-sm);padding:11px;font-weight:600;cursor:pointer;color:#fff}
.login-card button:disabled{opacity:.6;cursor:default}
.login-err{margin-top:12px;background:rgba(248,81,73,.12);border:1px solid rgba(248,81,73,.35);
  color:#ffb4ae;border-radius:var(--radius-sm);padding:9px 11px;font-size:13px}

/* ---------------------------------------------------------- Layout */
.app{height:100dvh;display:flex;flex-direction:column}
.body{flex:1;display:flex;min-height:0}

/* ---------------------------------------------------------- Topbar + Live-Stats */
.topbar{display:flex;align-items:center;gap:16px;padding:0 14px;height:52px;flex:none;
  background:var(--bg-2);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:9px;font-weight:650;white-space:nowrap}
.brand-dot{width:9px;height:9px;border-radius:50%;flex:none;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  box-shadow:0 0 12px rgba(91,140,255,.7)}
.topbar-right{margin-left:auto;display:flex;align-items:center;gap:10px}
.user-chip{font-size:12px;color:var(--fg-dim);background:var(--bg-3);
  border:1px solid var(--line);border-radius:999px;padding:3px 10px}
.icon-btn{background:transparent;border:1px solid transparent;border-radius:var(--radius-sm);
  padding:6px 9px;cursor:pointer;color:var(--fg-dim);transition:.15s}
.icon-btn:hover{background:var(--bg-3);color:var(--fg)}

.stats{display:flex;align-items:center;gap:14px;flex:1;min-width:0;overflow-x:auto;
  scrollbar-width:none}
.stats::-webkit-scrollbar{display:none}
.stat{display:flex;align-items:center;gap:6px;font-size:11.5px;white-space:nowrap}
.stat-label{color:var(--fg-faint);font-weight:600;letter-spacing:.03em}
.stat-bar{width:52px;height:5px;border-radius:99px;background:var(--bg-3);
  overflow:hidden;flex:none}
.stat-bar i{display:block;height:100%;width:0%;border-radius:99px;background:var(--ok);
  transition:width .4s ease,background .4s ease}
.stat-bar i.warn{background:var(--warn)}
.stat-bar i.crit{background:var(--crit)}
.stat-val{color:var(--fg-dim);font-variant-numeric:tabular-nums;min-width:34px}
.stat-wide .stat-val{min-width:0;max-width:190px;overflow:hidden;text-overflow:ellipsis}
.stat-live{display:flex;align-items:center;gap:5px;font-size:11px;color:var(--fg-faint)}
.live-dot{width:7px;height:7px;border-radius:50%;background:var(--ok);
  animation:pulse 2s infinite}
.stat-live.off .live-dot{background:var(--crit);animation:none}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}

/* ---------------------------------------------------------- Sidebar */
.sidebar{width:264px;flex:none;background:var(--bg-2);border-right:1px solid var(--line);
  display:flex;flex-direction:column;min-height:0}
.new-chat{margin:12px;padding:10px;background:var(--bg-3);border:1px solid var(--line);
  border-radius:var(--radius-sm);cursor:pointer;font-weight:600;transition:.15s}
.new-chat:hover{border-color:var(--accent);color:var(--accent)}
.chat-list{flex:1;overflow-y:auto;padding:0 8px 8px}
.chat-item{display:flex;align-items:center;gap:8px;padding:9px 10px;border-radius:var(--radius-sm);
  cursor:pointer;color:var(--fg-dim);transition:.12s;margin-bottom:2px}
.chat-item:hover{background:var(--bg-3);color:var(--fg)}
.chat-item.active{background:var(--bg-3);color:var(--fg);
  box-shadow:inset 2px 0 0 var(--accent)}
.chat-item-title{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:13px}
.chat-del{opacity:0;background:none;border:0;cursor:pointer;color:var(--fg-faint);padding:2px 4px}
.chat-item:hover .chat-del{opacity:1}
.chat-del:hover{color:var(--crit)}
.sidebar-foot{border-top:1px solid var(--line);padding:12px}
.mode-title{font-size:11px;color:var(--fg-faint);font-weight:600;letter-spacing:.04em;
  text-transform:uppercase;display:block;margin-bottom:8px}
.radio{display:flex;align-items:flex-start;gap:8px;padding:7px 8px;border-radius:var(--radius-sm);
  cursor:pointer;font-size:13px;transition:.12s}
.radio:hover{background:var(--bg-3)}
.radio input{margin-top:3px;accent-color:var(--accent)}
.radio small{display:block;color:var(--fg-faint);font-size:11px}

/* ---------------------------------------------------------- Nachrichten */
.main{flex:1;display:flex;flex-direction:column;min-width:0;min-height:0}
.messages{flex:1;overflow-y:auto;padding:24px 20px 8px;scroll-behavior:smooth}
.msg{max-width:820px;margin:0 auto 22px;display:flex;gap:13px}
.msg-avatar{width:28px;height:28px;border-radius:8px;flex:none;display:grid;place-items:center;
  font-size:13px;font-weight:700}
.msg.user .msg-avatar{background:var(--bg-3);color:var(--fg-dim)}
.msg.assistant .msg-avatar{background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff}
.msg-body{flex:1;min-width:0}
.msg-role{font-size:11px;color:var(--fg-faint);font-weight:600;margin-bottom:4px;
  text-transform:uppercase;letter-spacing:.04em}
.msg-content{overflow-wrap:anywhere}
.msg-content>*:first-child{margin-top:0}
.msg-content>*:last-child{margin-bottom:0}
.msg-content p{margin:0 0 10px}
.msg-content ul,.msg-content ol{margin:0 0 10px;padding-left:22px}
.msg-content li{margin:3px 0}
.msg-content h1,.msg-content h2,.msg-content h3{margin:18px 0 8px;line-height:1.3}
.msg-content h1{font-size:1.35em}.msg-content h2{font-size:1.2em}.msg-content h3{font-size:1.05em}
.msg-content blockquote{margin:0 0 10px;padding-left:12px;border-left:3px solid var(--line);
  color:var(--fg-dim)}
.msg-content table{border-collapse:collapse;margin:0 0 12px;font-size:13px;display:block;
  overflow-x:auto;max-width:100%}
.msg-content th,.msg-content td{border:1px solid var(--line);padding:6px 10px;text-align:left}
.msg-content th{background:var(--bg-3)}
.msg-content code:not(pre code){background:var(--bg-3);border:1px solid var(--line);
  border-radius:5px;padding:1px 5px;font-family:var(--mono);font-size:.9em}
.code-wrap{position:relative;margin:0 0 12px;border:1px solid var(--line);
  border-radius:var(--radius-sm);overflow:hidden;background:var(--bg-3)}
.code-head{display:flex;align-items:center;justify-content:space-between;
  padding:5px 10px;background:var(--bg-2);border-bottom:1px solid var(--line);
  font-size:11px;color:var(--fg-faint)}
.copy-btn{background:transparent;border:1px solid var(--line);border-radius:5px;
  padding:2px 9px;cursor:pointer;color:var(--fg-dim);font-size:11px;transition:.15s}
.copy-btn:hover{border-color:var(--accent);color:var(--accent)}
.copy-btn.done{border-color:var(--ok);color:var(--ok)}
.code-wrap pre{margin:0;padding:12px;overflow-x:auto}
.code-wrap code{font-family:var(--mono);font-size:12.5px;line-height:1.5}
.msg-meta{margin-top:6px;font-size:11px;color:var(--fg-faint)}
.msg-err{background:rgba(248,81,73,.1);border:1px solid rgba(248,81,73,.3);
  border-radius:var(--radius-sm);padding:9px 12px;color:#ffb4ae;font-size:13px}
.cursor-blink{display:inline-block;width:7px;height:15px;background:var(--accent);
  vertical-align:text-bottom;animation:blink 1s step-end infinite;margin-left:2px}
@keyframes blink{50%{opacity:0}}

.empty{max-width:600px;margin:12vh auto 0;text-align:center;color:var(--fg-dim)}
.empty-icon{font-size:40px;margin-bottom:10px}
.empty h1{font-size:24px;color:var(--fg);margin:0 0 8px}
.empty p{margin:0 0 22px;font-size:14px}
.empty-hints{display:flex;gap:8px;flex-wrap:wrap;justify-content:center}
.hint{background:var(--bg-2);border:1px solid var(--line);border-radius:999px;
  padding:7px 14px;cursor:pointer;color:var(--fg-dim);font-size:13px;transition:.15s}
.hint:hover{border-color:var(--accent);color:var(--accent)}

/* ---------------------------------------------------------- Composer */
.composer{flex:none;padding:8px 20px 16px;background:linear-gradient(transparent,var(--bg) 25%)}
.files{max-width:820px;margin:0 auto 8px;display:flex;gap:7px;flex-wrap:wrap}
.file-chip{display:flex;align-items:center;gap:7px;background:var(--bg-2);
  border:1px solid var(--line);border-radius:999px;padding:5px 11px;font-size:12px}
.file-chip.err{border-color:rgba(248,81,73,.4);color:#ffb4ae}
.file-chip .x{cursor:pointer;color:var(--fg-faint);border:0;background:none;padding:0 2px}
.file-chip .x:hover{color:var(--crit)}
.composer-box{max-width:820px;margin:0 auto;display:flex;align-items:flex-end;gap:8px;
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);
  padding:7px 8px 7px 10px;transition:border-color .15s}
.composer-box:focus-within{border-color:var(--accent)}
.composer-box textarea{flex:1;background:transparent;border:0;outline:none;resize:none;
  max-height:200px;padding:7px 0;line-height:1.5}
.send{background:linear-gradient(135deg,var(--accent),var(--accent-2));border:0;
  border-radius:9px;width:34px;height:34px;flex:none;cursor:pointer;color:#fff;font-size:14px}
.send:disabled{opacity:.4;cursor:default}
.send.stop{background:var(--crit)}
.attach{font-size:16px}
.composer-foot{max-width:820px;margin:7px auto 0;display:flex;justify-content:space-between;
  gap:12px;font-size:11.5px;color:var(--fg-faint)}
#status-line.busy{color:var(--accent)}
#status-line.err{color:var(--crit)}

.toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%);z-index:50;
  background:var(--bg-3);border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:10px 16px;font-size:13px;box-shadow:0 10px 30px rgba(0,0,0,.4)}
.toast.err{border-color:rgba(248,81,73,.45);color:#ffb4ae}

.only-mobile{display:none}
@media (max-width:820px){
  .only-mobile{display:block}
  .sidebar{position:fixed;inset:52px auto 0 0;z-index:30;transform:translateX(-100%);
    transition:transform .2s;box-shadow:8px 0 30px rgba(0,0,0,.4)}
  .sidebar.open{transform:none}
  .brand-name{display:none}
  .stat-wide,.stat-live{display:none}
  .messages{padding:16px 12px 8px}
  .composer{padding:8px 12px 12px}
}

/* Werkzeug-Schalter und Tool-Anzeige */
.toggle{display:flex;align-items:flex-start;gap:8px;padding:7px 8px;
  border-radius:var(--radius-sm);cursor:pointer;font-size:13px;transition:.12s}
.toggle:hover{background:var(--bg-3)}
.toggle input{margin-top:3px;accent-color:var(--accent)}
.toggle small{display:block;color:var(--fg-faint);font-size:11px}
.tool-chip{display:inline-flex;align-items:center;gap:7px;background:var(--bg-3);
  border:1px solid var(--line);border-radius:999px;padding:4px 12px;font-size:12px;
  color:var(--fg-dim);margin:0 0 8px}
.tool-chip.done{border-color:rgba(63,185,80,.4)}
.tool-chip .spin{width:9px;height:9px;border-radius:50%;border:2px solid var(--accent);
  border-top-color:transparent;animation:spin .8s linear infinite}
.tool-chip.done .spin{border:0;background:var(--ok);animation:none}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------------------------------------------------------- Denk-Animation */
/* Sichtbar zwischen Absenden und erstem Token. Auf dieser Hardware sind das
   20-30 Sekunden - ohne Rueckmeldung wirkt die Seite in der Zeit kaputt. */
.thinking{display:flex;align-items:center;gap:11px;padding:3px 0}
.think-dots{display:inline-flex;gap:5px;align-items:center}
.think-dots i{width:7px;height:7px;border-radius:50%;display:block;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  animation:think-bounce 1.3s ease-in-out infinite}
.think-dots i:nth-child(2){animation-delay:.18s}
.think-dots i:nth-child(3){animation-delay:.36s}
@keyframes think-bounce{
  0%,60%,100%{transform:translateY(0) scale(.85);opacity:.45}
  30%{transform:translateY(-5px) scale(1);opacity:1}
}
.think-label{font-size:13px;color:var(--fg-dim);display:flex;align-items:baseline;gap:7px}
.think-label b{font-weight:500;color:var(--fg-dim)}
.think-time{font-size:11.5px;color:var(--fg-faint);font-variant-numeric:tabular-nums}

/* Der Avatar pulsiert mit, solange gearbeitet wird */
.msg.working .msg-avatar{position:relative}
.msg.working .msg-avatar::after{content:"";position:absolute;inset:-3px;border-radius:11px;
  border:2px solid var(--accent);opacity:0;animation:think-ring 1.8s ease-out infinite}
@keyframes think-ring{
  0%{transform:scale(.9);opacity:.6}
  100%{transform:scale(1.35);opacity:0}
}

/* Schimmer-Balken: zeigt an, dass verarbeitet wird, ohne Fortschritt vorzutaeuschen */
.think-bar{height:2px;border-radius:2px;margin-top:9px;overflow:hidden;
  background:var(--bg-3);max-width:230px}
.think-bar i{display:block;height:100%;width:38%;border-radius:2px;
  background:linear-gradient(90deg,transparent,var(--accent),transparent);
  animation:think-slide 1.6s ease-in-out infinite}
@keyframes think-slide{
  0%{transform:translateX(-110%)} 100%{transform:translateX(330%)}
}

@media (prefers-reduced-motion:reduce){
  .think-dots i,.think-bar i,.msg.working .msg-avatar::after{animation-duration:3s}
  .think-dots i{animation-name:think-fade}
  @keyframes think-fade{0%,100%{opacity:.4}50%{opacity:1}}
}