:root{
  --bg:#0b1113; --panel:#111a1c; --panel-2:#162124; --line:#223135;
  --text:#e8f0ef; --muted:#8aa0a2; --accent:#25d366; --danger:#ff5d5d;
  --radius:14px;
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--text);font:15px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
.hidden{display:none !important}
.muted{color:var(--muted);font-size:13px}
h1,h2{margin:0;font-weight:650;letter-spacing:-.01em}
h2{font-size:15px}

.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 18px;border-bottom:1px solid var(--line);background:#0e1618;position:sticky;top:0;z-index:5}
.brand{display:flex;align-items:center;gap:8px;font-weight:700}
.dot{width:9px;height:9px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px rgba(37,211,102,.15)}
.topbar-right{display:flex;align-items:center;gap:8px;flex-wrap:wrap}

.btn{background:var(--panel-2);color:var(--text);border:1px solid var(--line);border-radius:10px;padding:8px 12px;font:inherit;font-size:13px;cursor:pointer}
.btn:hover{border-color:#31474b}
.btn.primary{background:var(--accent);color:#04120a;border-color:transparent;font-weight:650}
.btn.ghost{background:transparent}
.btn.danger{color:var(--danger);border-color:#4a2727;background:transparent}
.btn:disabled{opacity:.45;cursor:not-allowed}

select{background:var(--panel-2);color:var(--text);border:1px solid var(--line);border-radius:10px;padding:8px 10px;font:inherit;font-size:13px;max-width:220px}
.pill{font-size:12px;padding:4px 10px;border-radius:999px;border:1px solid var(--line);color:var(--muted)}
.pill.ok{color:#9ff5c2;border-color:#1d5c3a;background:rgba(37,211,102,.08)}
.pill.warn{color:#ffd79a;border-color:#5c4620;background:rgba(255,193,94,.08)}
.pill.bad{color:#ffb3b3;border-color:#5c2626;background:rgba(255,93,93,.08)}

.layout{display:grid;grid-template-columns:minmax(280px,360px) 1fr;gap:14px;padding:14px;height:calc(100vh - 61px)}
.panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);display:flex;flex-direction:column;min-height:0;overflow:hidden}
.panel-head{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:14px 16px;border-bottom:1px solid var(--line)}
.conversations .list{list-style:none;margin:0;padding:6px;overflow:auto;flex:1}
.conv{display:flex;flex-direction:column;gap:2px;padding:10px 12px;border-radius:10px;cursor:pointer;border:1px solid transparent}
.conv:hover{background:var(--panel-2)}
.conv.active{background:var(--panel-2);border-color:#2b4247}
.conv-top{display:flex;justify-content:space-between;gap:8px;align-items:baseline}
.conv-title{font-weight:600;font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.conv-time{font-size:11px;color:var(--muted);white-space:nowrap}
.conv-preview{font-size:12.5px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.badge{background:var(--accent);color:#04120a;font-size:11px;font-weight:700;border-radius:999px;padding:1px 7px}
.empty{padding:18px;color:var(--muted);font-size:13px;text-align:center}

.thread .messages{flex:1;overflow:auto;padding:18px;display:flex;flex-direction:column;gap:8px;background:linear-gradient(180deg,#0d1517,#0b1113)}
.msg{max-width:min(72%,620px);padding:8px 12px;border-radius:12px;background:var(--panel-2);border:1px solid var(--line);word-wrap:break-word;white-space:pre-wrap;font-size:14px}
.msg.out{align-self:flex-end;background:#123a26;border-color:#1b5c3a}
.msg .meta{display:block;font-size:10.5px;color:#8fae9f;margin-top:4px;text-align:right}
.composer{display:flex;gap:8px;padding:12px;border-top:1px solid var(--line);background:var(--panel)}
.composer input{flex:1;background:var(--panel-2);border:1px solid var(--line);border-radius:10px;padding:11px 12px;color:var(--text);font:inherit;font-size:14px}
.composer input:focus{outline:2px solid rgba(37,211,102,.25);outline-offset:1px}

.modal{position:fixed;inset:0;background:rgba(4,8,9,.72);display:flex;align-items:center;justify-content:center;padding:18px;z-index:20}
.modal-card{position:relative;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:22px;max-width:420px;width:100%}
.modal-close{position:absolute;top:10px;right:12px;background:none;border:0;color:var(--muted);font-size:24px;cursor:pointer;line-height:1}
.qr-wrap{margin:16px 0;display:flex;align-items:center;justify-content:center;min-height:320px;background:#fff;border-radius:12px;position:relative;overflow:hidden}
.qr-wrap img{display:block;image-rendering:pixelated}
.spinner{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:#fff;color:#334;font-size:13px}

.gate{position:fixed;inset:0;background:var(--bg);display:flex;align-items:center;justify-content:center;z-index:30;padding:18px}
.gate-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:24px;width:100%;max-width:380px;display:flex;flex-direction:column;gap:10px}
.gate-card label{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}
.gate-card input{background:var(--panel-2);border:1px solid var(--line);border-radius:10px;padding:11px 12px;color:var(--text);font:inherit}
.error{color:var(--danger);font-size:13px;min-height:18px;margin:0}
@media(max-width:860px){
  .layout{grid-template-columns:1fr;grid-template-rows:minmax(200px,38vh) 1fr;height:calc(100vh - 61px)}
  .msg{max-width:88%}
}