:root{--wai-red:#ff2d20;--wai-bg:#fff;--wai-fg:#18181b;--wai-mut:#71717a;--wai-line:#e4e4e7;--wai-soft:#f4f4f5;--wai-dark:#18181b}
@media (prefers-color-scheme:dark){:root{--wai-bg:#18181b;--wai-fg:#fafafa;--wai-mut:#a1a1aa;--wai-line:#3f3f46;--wai-soft:#27272a;--wai-dark:#fafafa}}

#wai-panel{position:fixed;right:20px;bottom:20px;width:380px;max-width:calc(100vw - 24px);height:560px;max-height:calc(100vh - 40px);
  background:var(--wai-bg);color:var(--wai-fg);border:1px solid var(--wai-line);border-radius:18px;
  box-shadow:0 25px 60px -12px rgba(0,0,0,.28);display:flex;flex-direction:column;z-index:999999;overflow:hidden;
  font-family:ui-sans-serif,system-ui,-apple-system,"Segoe UI","Noto Sans Bengali","Hind Siliguri",sans-serif;font-size:14px;line-height:1.55;
  animation:wai-in .18s ease-out}
#wai-panel.wai-hidden{display:none}
@keyframes wai-in{from{opacity:0;transform:translateY(12px) scale(.98)}to{opacity:1;transform:none}}

.wai-head{display:flex;align-items:center;gap:12px;padding:14px 16px;border-bottom:1px solid var(--wai-line)}
.wai-logo{width:36px;height:36px;border-radius:10px;background:var(--wai-red);color:#fff;display:grid;place-items:center;font-size:17px;flex:none}
.wai-title{flex:1;min-width:0;display:flex;flex-direction:column}
.wai-title b{font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.wai-title small{color:var(--wai-mut);font-size:12px}
.wai-head button{background:var(--wai-soft);border:0;color:var(--wai-mut);width:30px;height:30px;border-radius:8px;font-size:20px;line-height:1;cursor:pointer}
.wai-head button:hover{color:var(--wai-fg)}

#wai-msgs{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:10px;scroll-behavior:smooth}
.wai-bot,.wai-user{padding:9px 13px;border-radius:14px;max-width:86%;white-space:pre-wrap;word-break:break-word}
.wai-bot{background:var(--wai-soft);border-bottom-left-radius:4px;align-self:flex-start}
.wai-bot a{color:var(--wai-red);text-decoration:underline}
.wai-user{background:var(--wai-dark);color:var(--wai-bg);border-bottom-right-radius:4px;align-self:flex-end}

#wai-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:4px}
#wai-chips button{background:var(--wai-bg);border:1px solid var(--wai-line);color:var(--wai-fg);border-radius:999px;padding:6px 12px;font-size:13px;cursor:pointer;transition:.15s}
#wai-chips button:hover{border-color:var(--wai-red);color:var(--wai-red)}

.wai-typing{display:flex;gap:4px;align-items:center;padding:12px 14px}
.wai-typing i{width:6px;height:6px;border-radius:50%;background:var(--wai-mut);animation:wai-b 1s infinite}
.wai-typing i:nth-child(2){animation-delay:.15s}.wai-typing i:nth-child(3){animation-delay:.3s}
@keyframes wai-b{0%,60%,100%{transform:translateY(0);opacity:.4}30%{transform:translateY(-4px);opacity:1}}

.wai-input{display:flex;gap:8px;padding:12px;border-top:1px solid var(--wai-line)}
.wai-input input{flex:1;min-width:0;padding:10px 14px;background:var(--wai-bg);color:var(--wai-fg);border:1px solid var(--wai-line);border-radius:12px;font-size:14px;outline:0}
.wai-input input:focus{border-color:var(--wai-red);box-shadow:0 0 0 3px rgba(255,45,32,.15)}
.wai-input button{background:var(--wai-red);color:#fff;border:0;border-radius:12px;width:44px;font-size:16px;cursor:pointer}
.wai-input button:hover{filter:brightness(.92)}

@media (max-width:520px){
  #wai-panel{right:0;bottom:0;left:0;width:100%;max-width:100%;height:85vh;border-radius:18px 18px 0 0}
}

/* Product AI writer */
#wai-gen-box{margin:10px 0 14px;padding:14px;background:#fff;border:1px solid #e4e4e7;border-left:4px solid #ff2d20;border-radius:12px}
.wai-gen-top{display:flex;align-items:center;gap:8px;margin-bottom:8px;flex-wrap:wrap}
.wai-gen-top small{color:#71717a;width:100%}
.wai-gen-logo{width:24px;height:24px;border-radius:7px;background:#ff2d20;color:#fff;display:grid;place-items:center;font-size:13px}
#wai-gen-box textarea{width:100%;border:1px solid #e4e4e7;border-radius:10px;padding:10px;box-sizing:border-box}
#wai-gen-box textarea:focus{border-color:#ff2d20;outline:0;box-shadow:0 0 0 3px rgba(255,45,32,.15)}
.wai-gen-row{display:flex;align-items:center;gap:12px;margin-top:10px}
#wai-gen{background:#ff2d20;color:#fff;border:0;border-radius:10px;padding:9px 18px;font-weight:600;cursor:pointer}
#wai-gen:disabled{opacity:.6;cursor:wait}
#wai-status{font-size:13px;color:#52525b}

/* ---------- Shortcode: [ai_support_link] ---------- */
a.wai-btn{display:inline-flex;align-items:center;gap:10px;padding:12px 22px;background:#ff2d20;color:#fff !important;
  border-radius:14px;font-weight:600;font-size:15px;line-height:1.2;text-decoration:none !important;cursor:pointer;
  box-shadow:0 10px 24px -8px rgba(255,45,32,.6),inset 0 1px 0 rgba(255,255,255,.2);
  transition:transform .18s ease,box-shadow .18s ease,filter .18s ease}
a.wai-btn:hover{transform:translateY(-2px);box-shadow:0 14px 28px -8px rgba(255,45,32,.7),inset 0 1px 0 rgba(255,255,255,.2);filter:brightness(1.04)}
a.wai-btn:active{transform:translateY(0)}
.wai-btn-ico{display:grid;place-items:center;width:24px;height:24px;border-radius:8px;background:rgba(255,255,255,.22);font-size:13px}
.wai-btn-arr{transition:transform .18s ease;opacity:.9}
a.wai-btn:hover .wai-btn-arr{transform:translateX(4px)}

a.wai-card{display:flex;align-items:center;gap:14px;max-width:440px;padding:16px 18px;background:var(--wai-bg);color:var(--wai-fg) !important;
  border:1px solid var(--wai-line);border-radius:18px;text-decoration:none !important;cursor:pointer;
  box-shadow:0 1px 2px rgba(0,0,0,.04),0 12px 30px -16px rgba(0,0,0,.25);
  transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease}
a.wai-card:hover{transform:translateY(-2px);border-color:#ff2d20;box-shadow:0 1px 2px rgba(0,0,0,.04),0 18px 36px -16px rgba(255,45,32,.35)}
.wai-card-ico{flex:none;display:grid;place-items:center;width:46px;height:46px;border-radius:14px;background:#ff2d20;color:#fff;font-size:20px;
  box-shadow:0 8px 18px -6px rgba(255,45,32,.55)}
.wai-card-txt{flex:1;min-width:0;display:flex;flex-direction:column;gap:2px}
.wai-card-txt b{font-size:16px;color:var(--wai-fg)}
.wai-card-txt small{font-size:13px;color:var(--wai-mut);line-height:1.4}
.wai-card-arr{flex:none;color:var(--wai-mut);font-size:18px;transition:transform .18s ease,color .18s ease}
a.wai-card:hover .wai-card-arr{transform:translateX(4px);color:#ff2d20}

/* ---------- Floating chat button ---------- */
#wai-fab{position:fixed;right:18px;bottom:20px;z-index:999998;display:inline-flex;align-items:center;gap:8px;padding:11px 18px 11px 12px;
  background:#ff2d20;color:#fff;border:0;border-radius:999px;font:600 14px/1 ui-sans-serif,system-ui,"Noto Sans Bengali","Hind Siliguri",sans-serif;cursor:pointer;
  box-shadow:0 12px 28px -8px rgba(255,45,32,.65),inset 0 1px 0 rgba(255,255,255,.2);transition:transform .18s ease,box-shadow .18s ease}
#wai-fab:hover{transform:translateY(-2px)}
.wai-fab-ico{display:grid;place-items:center;width:26px;height:26px;border-radius:50%;background:rgba(255,255,255,.22);font-size:13px}
body.wai-is-open #wai-fab{display:none}
@media (max-width:782px){#wai-fab{bottom:88px;right:12px}}

/* ---------- Tabs & messages ---------- */
.wai-tabs{display:flex;gap:6px;padding:8px 12px 0;border-bottom:1px solid var(--wai-line)}
.wai-tabs button{flex:1;background:none;border:0;border-bottom:2px solid transparent;padding:9px 6px;font:600 13px/1 inherit;color:var(--wai-mut);cursor:pointer;display:flex;align-items:center;justify-content:center;gap:6px}
.wai-tabs button.on{color:var(--wai-fg);border-bottom-color:var(--wai-red)}
.wai-tabs em{font-style:normal;background:var(--wai-red);color:#fff;border-radius:999px;font-size:11px;min-width:18px;height:18px;line-height:18px;text-align:center;padding:0 5px}
.wai-view{flex:1;min-height:0;display:flex;flex-direction:column}
.wai-view[hidden],.wai-tabs em[hidden]{display:none}
#wai-mbody{flex:1;min-height:0;overflow-y:auto;padding:14px;display:flex;flex-direction:column;gap:10px}
#wai-mbody input,#wai-mbody textarea{width:100%;box-sizing:border-box;padding:10px 12px;background:var(--wai-bg);color:var(--wai-fg);border:1px solid var(--wai-line);border-radius:12px;font:inherit;outline:0}
#wai-mbody input:focus,#wai-mbody textarea:focus{border-color:var(--wai-red);box-shadow:0 0 0 3px rgba(255,45,32,.15)}
.wai-note{color:var(--wai-mut);font-size:13px}
.wai-primary{background:var(--wai-red);color:#fff;border:0;border-radius:12px;padding:11px 16px;font:600 14px/1 inherit;cursor:pointer}
.wai-primary:hover{filter:brightness(.93)}
.wai-back{align-self:flex-start;background:none;border:0;color:var(--wai-mut);font-size:13px;cursor:pointer;padding:0}
.wai-back:hover{color:var(--wai-red)}
.wai-th{display:flex;flex-direction:column;gap:2px;text-align:left;background:var(--wai-bg);color:var(--wai-fg);border:1px solid var(--wai-line);border-radius:14px;padding:11px 13px;cursor:pointer}
.wai-th:hover{border-color:var(--wai-red)}
.wai-th b{font-size:14px}.wai-th span{font-size:13px;color:var(--wai-mut);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.wai-th small{font-size:11px;color:var(--wai-mut)}
.wai-dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--wai-red);margin-left:4px}
.wai-thtitle{font-weight:700}
.wai-thread{flex:1;min-height:120px;overflow-y:auto;display:flex;flex-direction:column;gap:8px}
.wai-thread small{display:block;font-size:11px;opacity:.6;margin-top:3px}
#wai-mbody .wai-input{margin:0 -14px -14px;padding:10px 12px}
.wai-done{text-align:center;padding:24px 8px;display:flex;flex-direction:column;align-items:center;gap:8px}
.wai-check{width:48px;height:48px;border-radius:50%;background:var(--wai-red);color:#fff;display:grid;place-items:center;font-size:24px}
.wai-ho{align-self:flex-start;background:var(--wai-bg);color:var(--wai-red);border:1px solid var(--wai-red);border-radius:999px;padding:8px 14px;font:600 13px/1 inherit;cursor:pointer}
.wai-ho:hover{background:var(--wai-red);color:#fff}