#sy-chat{position:fixed;right:18px;bottom:18px;z-index:9999;font-family:inherit;--sy-ease:cubic-bezier(.22,1,.36,1)}
#sy-open{width:58px;height:58px;border-radius:50%;border:0;cursor:pointer;font-size:26px;position:relative;
  background:linear-gradient(135deg,#1e3a8a,#2563eb);color:#fff;box-shadow:0 6px 18px rgba(0,0,0,.25);
  transition:transform .35s var(--sy-ease),box-shadow .35s var(--sy-ease);animation:sy-float 3.2s ease-in-out infinite}
#sy-open:hover{transform:scale(1.08);box-shadow:0 10px 26px rgba(37,99,235,.45)}
#sy-open:active{transform:scale(.94)}
#sy-open span{display:inline-block;transition:transform .45s var(--sy-ease)}
#sy-chat.open #sy-open{animation:none}
#sy-chat.open #sy-open span{transform:rotate(135deg) scale(.9)}
/* A soft ring that breathes until the chat is first opened. */
#sy-open::after{content:"";position:absolute;inset:0;border-radius:50%;border:2px solid #60a5fa;
  animation:sy-ring 2.4s ease-out infinite;pointer-events:none}
#sy-chat.seen #sy-open::after{display:none}
#sy-panel{position:absolute;right:0;bottom:72px;width:min(360px,calc(100vw - 36px));height:min(520px,70vh);
  background:#fff;border-radius:16px;box-shadow:0 12px 36px rgba(0,0,0,.28);display:flex;flex-direction:column;overflow:hidden;
  transform-origin:bottom right;opacity:0;transform:translateY(16px) scale(.92);pointer-events:none;
  transition:opacity .28s ease,transform .38s var(--sy-ease)}
#sy-chat.open #sy-panel{opacity:1;transform:none;pointer-events:auto}
#sy-panel[hidden]{display:none}
#sy-panel header{background:linear-gradient(120deg,#1e3a8a,#2563eb,#1e3a8a);background-size:200% 100%;
  animation:sy-sheen 8s ease-in-out infinite;color:#fff;padding:12px 40px 10px 14px;position:relative}
#sy-panel header strong{display:block;font-size:16px}
#sy-panel header small{opacity:.85;font-size:12px}
#sy-close{position:absolute;right:8px;top:8px;background:none;border:0;color:#fff;font-size:24px;cursor:pointer;
  border-radius:50%;width:34px;height:34px;line-height:1;transition:background .2s,transform .3s var(--sy-ease)}
#sy-close:hover{background:rgba(255,255,255,.15);transform:rotate(90deg)}
#sy-log{flex:1;overflow-y:auto;padding:12px;background:#f3f4f6;scroll-behavior:smooth;overscroll-behavior:contain}
#sy-log p{margin:6px 0;padding:9px 12px;border-radius:14px;max-width:85%;line-height:1.5;font-size:14px;white-space:pre-wrap;color:#111;
  animation:sy-in .36s var(--sy-ease) both}
#sy-log .sy-ai{background:#fff;transform-origin:bottom left;border-bottom-left-radius:4px;box-shadow:0 1px 2px rgba(0,0,0,.06)}
#sy-log .sy-me{background:#2563eb;color:#fff;margin-left:auto;transform-origin:bottom right;border-bottom-right-radius:4px}
/* "Thinking": three dots that bounce, not a still "…". */
#sy-log .sy-dots{display:inline-flex;gap:5px;padding:13px 14px}
#sy-log .sy-dots i{width:7px;height:7px;border-radius:50%;background:#93a3c0;animation:sy-bounce 1.2s infinite ease-in-out}
#sy-log .sy-dots i:nth-child(2){animation-delay:.15s}
#sy-log .sy-dots i:nth-child(3){animation-delay:.3s}
#sy-chips{display:flex;gap:6px;flex-wrap:wrap;padding:8px 10px;background:#f3f4f6;
  transition:opacity .25s,max-height .35s var(--sy-ease),padding .35s var(--sy-ease);max-height:160px;overflow:hidden}
#sy-chips.gone{opacity:0;max-height:0;padding-top:0;padding-bottom:0}
#sy-chips button{border:1px solid #c7d2fe;background:#fff;border-radius:16px;padding:5px 10px;font-size:12px;cursor:pointer;
  transition:background .2s,transform .2s var(--sy-ease),border-color .2s;animation:sy-in .4s var(--sy-ease) both}
#sy-chips button:nth-child(2){animation-delay:.06s}
#sy-chips button:nth-child(3){animation-delay:.12s}
#sy-chips button:hover{background:#eef2ff;border-color:#818cf8;transform:translateY(-1px)}
#sy-form{display:flex;gap:6px;padding:10px;border-top:1px solid #e5e7eb}
#sy-input{flex:1;border:1px solid #d1d5db;border-radius:20px;padding:9px 14px;font-size:14px;color:#111;outline:none;
  transition:border-color .2s,box-shadow .2s}
#sy-input:focus{border-color:#2563eb;box-shadow:0 0 0 3px rgba(37,99,235,.18)}
#sy-form button{border:0;border-radius:50%;width:40px;background:#2563eb;color:#fff;cursor:pointer;
  transition:transform .25s var(--sy-ease),opacity .2s,background .2s}
#sy-form button:hover{background:#1d4ed8}
#sy-form button:active{transform:scale(.88)}
#sy-chat.busy #sy-form button{opacity:.55;cursor:default}
@keyframes sy-in{from{opacity:0;transform:translateY(8px) scale(.96)}to{opacity:1;transform:none}}
@keyframes sy-bounce{0%,80%,100%{transform:translateY(0);opacity:.5}40%{transform:translateY(-6px);opacity:1}}
@keyframes sy-float{0%,100%{translate:0 0}50%{translate:0 -4px}}
@keyframes sy-ring{0%{transform:scale(1);opacity:.7}100%{transform:scale(1.55);opacity:0}}
@keyframes sy-sheen{0%,100%{background-position:0 0}50%{background-position:100% 0}}
/* A phone: the chat takes the whole screen when opened (owner 2026-10-14), the
   bubble steps aside, and the close × is big enough for a thumb. dvh follows the
   keyboard, so the box to type in stays above it. It slides up from the bottom. */
@media (max-width:640px){
  #sy-chat.full #sy-panel{position:fixed;inset:0;width:100vw;height:100vh;height:100dvh;
    border-radius:0;bottom:auto;right:auto;transform:translateY(100%);opacity:1;
    transition:transform .42s var(--sy-ease)}
  #sy-chat.full.open #sy-panel{transform:none}
  #sy-chat.full #sy-open{opacity:0;transform:scale(.6);pointer-events:none;animation:none}
  #sy-chat.full #sy-panel header{padding:16px 56px 14px 16px}
  #sy-chat.full #sy-close{font-size:32px;top:10px;right:12px;width:44px;height:44px}
  #sy-chat.full #sy-log p{font-size:15px}
  #sy-chat.full #sy-input{font-size:16px}  /* 16px: iOS does not zoom the page */
}
@media (prefers-reduced-motion:reduce){
  #sy-chat *,#sy-chat *::after{animation:none!important;transition:none!important}
}
body.sy-lock{overflow:hidden}