/* Chat by What10 — Vchat UI. Brand tokens (--w10-*) are injected by banner.js;
   fallbacks keep it sane before that loads. */
:root{
  --bg: #f6f7fb; --panel: #ffffff; --ink: #1b1d28; --muted: #6b7180;
  --line: #e6e8f0; --indigo: var(--w10-indigo, #4f46e5); --purple: var(--w10-purple, #7c3aed);
  --radius: var(--w10-radius-control, 12px); --user-bubble: #eef0fb;
}
[data-theme="dark"]{
  --bg:#0f1117; --panel:#161924; --ink:#e8eaf2; --muted:#9aa0b3; --line:#262a38; --user-bubble:#1d2233;
}
*{box-sizing:border-box}
[hidden]{display:none !important}   /* beat .gate/.shell display:grid */
body{margin:0;background:var(--bg);color:var(--ink);
  font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;}
h1,h2{font-family:"Space Grotesk",Inter,sans-serif;}

/* ---- signed-out gate ---- */
.gate{min-height:calc(100vh - 64px);display:grid;place-items:center;padding:24px;}
.gate-card{background:var(--panel);border:1px solid var(--line);border-radius:20px;
  padding:40px 32px;max-width:440px;text-align:center;box-shadow:0 10px 40px rgba(20,20,60,.06);}
.gate-logo{border-radius:14px;margin-bottom:8px}
.gate-card h1{margin:.2em 0;font-size:1.7rem}
.gate-card p{color:var(--muted);line-height:1.55}
.gate-note{font-size:.85rem;margin-top:14px}
.btn-primary{display:inline-block;margin-top:10px;background:linear-gradient(135deg,var(--indigo),var(--purple));
  color:#fff;text-decoration:none;padding:12px 26px;border-radius:var(--radius);font-weight:600;}

/* ---- shell: sidebar + thread ---- */
.shell{display:grid;grid-template-columns:264px 1fr;height:calc(100vh - 64px);}
.sidebar{border-right:1px solid var(--line);background:var(--panel);padding:14px 12px;
  display:flex;flex-direction:column;gap:12px;overflow:hidden;}
.new-chat{background:transparent;border:1px solid var(--line);color:var(--ink);
  border-radius:var(--radius);padding:11px 14px;font-weight:600;cursor:pointer;text-align:left;font-size:.95rem;}
.new-chat:hover{border-color:var(--indigo);color:var(--indigo)}
.conv-list{display:flex;flex-direction:column;gap:2px;overflow-y:auto;}
.conv-item{display:flex;align-items:center;gap:8px;padding:9px 11px;border-radius:10px;
  cursor:pointer;color:var(--ink);font-size:.9rem;border:1px solid transparent;}
.conv-item:hover{background:var(--bg)}
.conv-item.active{background:var(--bg);border-color:var(--line)}
.conv-title{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.conv-del{opacity:0;border:none;background:none;color:var(--muted);cursor:pointer;font-size:1rem;padding:0 2px}
.conv-item:hover .conv-del{opacity:1}
.conv-del:hover{color:#e2466b}

/* ---- thread ---- */
.thread-pane{display:flex;flex-direction:column;min-width:0;}
.thread{flex:1;overflow-y:auto;padding:24px 0;}
.empty{max-width:560px;margin:8vh auto 0;text-align:center;color:var(--muted)}
.empty img{border-radius:14px;opacity:.9}
.empty h2{color:var(--ink);margin:.4em 0 .2em}
.suggestions{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:18px}
.sugg{background:var(--panel);border:1px solid var(--line);border-radius:999px;padding:8px 14px;
  font-size:.86rem;cursor:pointer;color:var(--ink)}
.sugg:hover{border-color:var(--indigo);color:var(--indigo)}

.msg{max-width:760px;margin:0 auto;padding:14px 20px;display:flex;gap:14px;}
.msg .avatar{flex:none;width:30px;height:30px;border-radius:8px;display:grid;place-items:center;
  font-size:.85rem;font-weight:700;color:#fff}
.msg.user .avatar{background:#9aa0b3}
.msg.assistant .avatar{background:linear-gradient(135deg,var(--indigo),var(--purple))}
.msg .body{min-width:0;flex:1;line-height:1.6}
.msg.user .body{background:var(--user-bubble);border-radius:14px;padding:10px 14px;align-self:flex-start}
.bubble-text{white-space:pre-wrap;word-wrap:break-word}
.cite-ref{display:inline-block;vertical-align:super;font-size:.7em;color:var(--indigo);
  text-decoration:none;font-weight:700;padding:0 1px}
.cite-ref:hover{text-decoration:underline}
.sources{margin-top:12px;display:flex;flex-direction:column;gap:6px}
.sources h4{margin:0 0 2px;font-size:.74rem;letter-spacing:.04em;text-transform:uppercase;color:var(--muted)}
.source{display:flex;gap:8px;align-items:baseline;font-size:.84rem;text-decoration:none;color:var(--ink);
  border:1px solid var(--line);border-radius:10px;padding:7px 10px;background:var(--panel)}
.source:hover{border-color:var(--indigo)}
.source .n{color:var(--indigo);font-weight:700}
.source .host{color:var(--muted);margin-left:auto;flex:none}
.badge{display:inline-block;font-size:.68rem;font-weight:600;color:var(--muted);
  border:1px solid var(--line);border-radius:6px;padding:1px 6px;margin-left:8px;vertical-align:middle}
.kind-cta{margin-top:10px}
.kind-cta a{color:var(--indigo);font-weight:600;text-decoration:none}
.fbk{margin-top:8px;display:flex;align-items:center;gap:4px}
.fbk button{border:1px solid var(--line);background:var(--panel);border-radius:8px;
  padding:2px 8px;cursor:pointer;font-size:.95rem;line-height:1.4;opacity:.65}
.fbk button:hover{opacity:1;border-color:var(--indigo)}
.fbk.voted button{opacity:.4;pointer-events:none}
.fbk-msg{font-size:.78rem;color:var(--muted);margin-left:6px}

/* thinking loader */
.thinking{display:flex;align-items:center;gap:10px;color:var(--muted)}
.thinking img{width:26px;height:26px}

/* ---- composer ---- */
.composer{max-width:760px;margin:0 auto;width:100%;padding:0 20px 6px;display:flex;gap:10px;align-items:flex-end}
#input{flex:1;resize:none;max-height:180px;border:1px solid var(--line);background:var(--panel);
  color:var(--ink);border-radius:16px;padding:13px 16px;font:inherit;line-height:1.5;outline:none}
#input:focus{border-color:var(--indigo)}
.send{flex:none;width:44px;height:44px;border:none;border-radius:50%;cursor:pointer;color:#fff;
  background:linear-gradient(135deg,var(--indigo),var(--purple));display:grid;place-items:center}
.send:disabled{opacity:.4;cursor:default}
.disclaimer{max-width:760px;margin:4px auto 12px;width:100%;padding:0 20px;
  font-size:.74rem;color:var(--muted);text-align:center}

@media(max-width:760px){
  .shell{grid-template-columns:1fr}
  .sidebar{position:fixed;z-index:30;left:0;top:64px;bottom:0;width:264px;transform:translateX(-100%);
    transition:transform .2s}
  .sidebar.open{transform:none}
}