:root{
  --brand:#01164a;--brand2:#1a3fa0;--bg:#f0f2f8;--surface:#fff;
  --text:#111827;--muted:#6b7280;--border:rgba(0,0,0,.07);
  --red:#dc2626;--green:#16a34a;--radius:14px;
  --sb-w:300px;
  --sat:env(safe-area-inset-top,0px);
  --sab:env(safe-area-inset-bottom,0px);
}
*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}
html,body{height:100%;overflow:hidden;background:var(--brand);
  font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
  color:var(--text);-webkit-font-smoothing:antialiased}

/* ── Gate ── */
#gate{position:fixed;inset:0;z-index:9999;background:var(--brand);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  padding-top:var(--sat);transition:opacity .35s}
#gate.out{opacity:0;pointer-events:none}
.g-icon{width:72px;height:72px;background:rgba(255,255,255,.1);border-radius:20px;
  display:flex;align-items:center;justify-content:center;margin-bottom:4px}
.g-spin{width:34px;height:34px;border:3px solid rgba(255,255,255,.15);
  border-top-color:#fff;border-radius:50%;animation:spin .75s linear infinite}
.g-msg{color:rgba(255,255,255,.65);font-size:13px;font-weight:500}
.g-btn{background:#fff;color:var(--brand);border:none;border-radius:12px;
  padding:12px 28px;font-size:15px;font-weight:700;cursor:pointer;display:none;margin-top:4px}
.g-btn:active{opacity:.88}
@keyframes spin{to{transform:rotate(360deg)}}

/* ── App shell ── */
#app{position:fixed;inset:0;display:flex;
  padding-top:var(--sat);padding-bottom:0;overflow:hidden}

/* ── Sidebar ── */
#sb{width:var(--sb-w);flex-shrink:0;display:flex;flex-direction:column;
  background:var(--brand);transition:transform .3s cubic-bezier(.4,0,.2,1);z-index:20}
.sb-top{display:flex;align-items:center;gap:8px;padding:14px 14px 10px;flex-shrink:0}
.sb-wordmark{font-size:15px;font-weight:800;color:#fff;letter-spacing:.02em;flex:1}
.sb-wordmark em{font-style:normal;opacity:.5;font-weight:400}
#conn-dot{width:7px;height:7px;border-radius:50%;background:#6b7280;
  flex-shrink:0;transition:background .4s}
#conn-dot.on{background:#4ade80}
.sb-back{color:rgba(255,255,255,.45);font-size:12px;text-decoration:none;
  padding:4px 8px;border-radius:8px;border:1px solid rgba(255,255,255,.15);
  white-space:nowrap;transition:color .15s,border-color .15s}
.sb-back:hover{color:#fff;border-color:rgba(255,255,255,.4)}
.sb-search-wrap{padding:0 10px 8px;flex-shrink:0}
.sb-search{width:100%;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.1);
  border-radius:10px;padding:8px 12px;color:#fff;font-size:13px;outline:none;transition:border-color .15s}
.sb-search:focus{border-color:rgba(255,255,255,.3)}
.sb-search::placeholder{color:rgba(255,255,255,.35)}
#conv-list{flex:1;overflow-y:auto;padding:4px 8px 12px}
#conv-list::-webkit-scrollbar{width:3px}
#conv-list::-webkit-scrollbar-thumb{background:rgba(255,255,255,.15);border-radius:99px}

/* Conv item */
.ci{display:flex;align-items:center;gap:10px;padding:10px 10px;border-radius:10px;
  cursor:pointer;transition:background .15s;position:relative;user-select:none}
.ci:hover,.ci.on{background:rgba(255,255,255,.13)}
.ci-av{width:44px;height:44px;border-radius:50%;display:flex;align-items:center;
  justify-content:center;font-size:14px;font-weight:700;color:#fff;flex-shrink:0;text-transform:uppercase}
.ci-body{flex:1;min-width:0}
.ci-name{font-size:13px;font-weight:600;color:#fff;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ci-last{font-size:11px;color:rgba(255,255,255,.45);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-top:2px}
.ci-badge{background:var(--red);color:#fff;font-size:10px;font-weight:700;
  border-radius:99px;min-width:18px;height:18px;display:flex;align-items:center;
  justify-content:center;padding:0 5px;flex-shrink:0}
.sb-empty{color:rgba(255,255,255,.3);font-size:13px;text-align:center;padding:24px 16px}

/* ── Main chat ── */
#chat{flex:1;display:flex;flex-direction:column;background:var(--bg);
  min-width:0;transition:transform .3s cubic-bezier(.4,0,.2,1);position:relative}

/* Chat header */
#ch{display:flex;align-items:center;gap:10px;padding:12px 14px;
  background:var(--surface);border-bottom:1px solid var(--border);
  flex-shrink:0;min-height:58px;z-index:2;
  box-shadow:0 1px 3px rgba(0,0,0,.06)}
#ch-back{display:none;background:none;border:none;cursor:pointer;
  padding:4px 6px 4px 2px;color:var(--brand);flex-shrink:0;align-items:center}
.ch-av{width:38px;height:38px;border-radius:50%;display:flex;align-items:center;
  justify-content:center;font-size:13px;font-weight:700;color:#fff;flex-shrink:0}
.ch-info{flex:1;min-width:0}
.ch-name{font-size:14px;font-weight:700;color:var(--text);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ch-sub{font-size:11px;color:var(--muted)}
.ch-actions{display:flex;align-items:center;gap:6px;flex-shrink:0}
#go-live-btn{display:none;align-items:center;gap:5px;background:var(--red);
  color:#fff;border:none;border-radius:20px;padding:5px 13px;font-size:12px;
  font-weight:700;cursor:pointer;transition:background .2s;white-space:nowrap}
#go-live-btn.v{display:flex}
#go-live-btn.air{background:var(--green)}

/* Live bar */
#live-bar{display:none;align-items:center;gap:8px;padding:8px 14px;
  background:var(--red);color:#fff;cursor:pointer;flex-shrink:0;
  animation:lbP 2s ease-in-out infinite}
#live-bar.v{display:flex}
@keyframes lbP{0%,100%{opacity:1}50%{opacity:.85}}
.lb-dot{width:8px;height:8px;border-radius:50%;background:#fff;
  animation:lbD 1s ease-in-out infinite;flex-shrink:0}
@keyframes lbD{0%,100%{transform:scale(1)}50%{transform:scale(1.5)}}
.lb-txt{flex:1;font-size:13px;font-weight:700}
.lb-watch{background:rgba(255,255,255,.22);border:none;color:#fff;
  padding:4px 12px;border-radius:20px;font-size:12px;font-weight:700;cursor:pointer}

/* Empty state */
#no-conv{flex:1;display:flex;flex-direction:column;align-items:center;
  justify-content:center;gap:10px;opacity:.3;padding:20px}
#no-conv p{font-size:14px;font-weight:600}

/* Messages */
#msgs{flex:1;overflow-y:auto;padding:14px 12px;
  display:flex;flex-direction:column;gap:1px}
#msgs::-webkit-scrollbar{width:4px}
#msgs::-webkit-scrollbar-thumb{background:rgba(0,0,0,.1);border-radius:99px}
.msgs-empty{display:flex;flex-direction:column;align-items:center;
  justify-content:center;flex:1;gap:10px;opacity:.35;padding:24px}
.msg-row{display:flex;gap:8px;padding:1px 0}
.msg-row.me{flex-direction:row-reverse}
.msg-row.sys{justify-content:center;padding:4px 0}
.msg-av-slot{width:30px;flex-shrink:0;display:flex;align-items:flex-end}
.msg-sm-av{width:28px;height:28px;border-radius:50%;display:flex;align-items:center;
  justify-content:center;font-size:10px;font-weight:700;color:#fff}
.msg-col{display:flex;flex-direction:column;max-width:74%;gap:1px}
.msg-row.me .msg-col{align-items:flex-end}
.msg-sender{font-size:11px;color:var(--muted);padding:0 10px;margin-bottom:2px}
.msg-bbl{background:var(--surface);border-radius:18px;border-bottom-left-radius:4px;
  padding:8px 12px;font-size:14px;line-height:1.5;color:var(--text);
  box-shadow:0 1px 2px rgba(0,0,0,.05);word-break:break-word;white-space:pre-wrap}
.msg-row.me .msg-bbl{background:var(--brand);color:#fff;
  border-radius:18px;border-bottom-right-radius:4px}
.msg-row.sys .msg-bbl{background:rgba(0,0,0,.06);color:var(--muted);
  font-size:12px;border-radius:20px;padding:4px 14px;box-shadow:none}
.msg-ts{font-size:10px;color:var(--muted);padding:0 10px}
.msg-day{text-align:center;font-size:11px;color:var(--muted);
  padding:12px 0 4px;font-weight:600}

/* Typing */
#typing{display:none;align-items:center;gap:8px;padding:5px 14px;
  font-size:12px;color:var(--muted);flex-shrink:0}
#typing.v{display:flex}
.td span{display:inline-block;width:5px;height:5px;border-radius:50%;
  background:var(--muted);margin:0 1px;animation:td .9s ease-in-out infinite}
.td span:nth-child(2){animation-delay:.15s}
.td span:nth-child(3){animation-delay:.3s}
@keyframes td{0%,100%{transform:translateY(0)}50%{transform:translateY(-4px)}}

/* Input */
#inp-row{display:flex;align-items:flex-end;gap:8px;
  padding:10px 12px calc(10px + var(--sab));
  background:var(--surface);border-top:1px solid var(--border);flex-shrink:0}
#inp{flex:1;background:var(--bg);border:1.5px solid var(--border);
  border-radius:22px;padding:9px 14px;font-size:14px;color:var(--text);
  resize:none;outline:none;max-height:100px;overflow-y:auto;
  line-height:1.45;transition:border-color .15s;font-family:inherit}
#inp:focus{border-color:var(--brand2)}
#inp::placeholder{color:var(--muted)}
#send{width:40px;height:40px;background:var(--brand);border:none;border-radius:50%;
  cursor:pointer;display:flex;align-items:center;justify-content:center;
  flex-shrink:0;transition:transform .1s,background .15s}
#send:active{transform:scale(.9)}
#send:disabled{background:#d1d5db;cursor:default}

/* ── Mobile layout ── */
@media(max-width:768px){
  #sb{position:absolute;inset:0;width:100%;
    transform:translateX(0);transition:transform .3s cubic-bezier(.4,0,.2,1)}
  #sb.slide-out{transform:translateX(-100%)}
  #chat{position:absolute;inset:0;transform:translateX(100%)}
  #chat.slide-in{transform:translateX(0)}
  #ch-back{display:flex!important}
}

/* ── TikTok Live Overlay ── */
#lo{position:fixed;inset:0;z-index:8000;display:none;flex-direction:column;background:#000}
#lo.v{display:flex}
#lo-vid{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0}
.lo-hd{position:absolute;top:0;left:0;right:0;z-index:10;
  padding:calc(14px + var(--sat)) 14px 40px;
  background:linear-gradient(to bottom,rgba(0,0,0,.78) 0%,transparent 100%);
  display:flex;align-items:center;gap:8px}
.lo-pulse{width:8px;height:8px;border-radius:50%;background:#ef4444;
  flex-shrink:0;animation:lbD 1.5s ease-in-out infinite}
.lo-badge{background:var(--red);color:#fff;font-size:10px;font-weight:800;
  padding:2px 8px;border-radius:4px;letter-spacing:.08em;flex-shrink:0}
.lo-who{color:#fff;font-size:14px;font-weight:700;flex:1;
  text-shadow:0 1px 4px rgba(0,0,0,.5);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.lo-eyes{display:flex;align-items:center;gap:4px;color:rgba(255,255,255,.9);
  font-size:12px;font-weight:600;background:rgba(0,0,0,.45);
  border-radius:20px;padding:3px 9px;flex-shrink:0}
.lo-x{background:rgba(0,0,0,.55);border:none;color:#fff;width:32px;height:32px;
  border-radius:50%;cursor:pointer;display:flex;align-items:center;
  justify-content:center;font-size:17px;flex-shrink:0}
#lo-msgs{position:absolute;bottom:70px;left:0;right:80px;max-height:45%;
  z-index:5;overflow-y:auto;padding:10px 12px;
  display:flex;flex-direction:column;gap:4px;
  -webkit-mask-image:linear-gradient(to bottom,transparent,#000 20%)}
.lm{display:flex;flex-direction:column;max-width:88%}
.lm-name{font-size:11px;color:rgba(255,255,255,.65);padding:0 8px;margin-bottom:2px}
.lm-bbl{background:rgba(0,0,0,.5);backdrop-filter:blur(5px);color:#fff;
  border-radius:14px;padding:6px 11px;font-size:13px;word-break:break-word}
.lo-inp-row{position:absolute;bottom:0;left:0;right:0;z-index:6;
  background:rgba(0,0,0,.7);backdrop-filter:blur(16px);
  border-top:1px solid rgba(255,255,255,.08);
  display:flex;align-items:center;gap:8px;
  padding:10px 12px calc(10px + var(--sab))}
#lo-inp{flex:1;background:rgba(255,255,255,.13);border:1px solid rgba(255,255,255,.2);
  border-radius:22px;padding:9px 14px;color:#fff;font-size:14px;outline:none;
  font-family:inherit}
#lo-inp::placeholder{color:rgba(255,255,255,.38)}
#lo-send{width:38px;height:38px;background:var(--red);border:none;border-radius:50%;
  cursor:pointer;display:flex;align-items:center;justify-content:center;flex-shrink:0}

/* Toast */
#toast{position:fixed;bottom:calc(24px + var(--sab));left:50%;
  transform:translateX(-50%) translateY(12px);background:rgba(10,15,40,.92);
  color:#fff;padding:10px 20px;border-radius:22px;font-size:13px;font-weight:600;
  white-space:nowrap;z-index:99999;opacity:0;pointer-events:none;
  transition:opacity .25s,transform .25s;backdrop-filter:blur(8px);
  max-width:calc(100vw - 40px);text-align:center}
#toast.v{opacity:1;transform:translateX(-50%) translateY(0)}