/* ==========================================================================
   INB SCHOOL SYSTEM — floating chat widget + back-to-top button
   Both are fixed to the viewport and stay clear of each other: the chat sits
   on the side chosen in Site Settings, "back to top" takes the other one.
   ========================================================================== */
:root{
  --chat-accent:#1f6fe0;
  --chat-ink:#1b2a4a;
  --chat-muted:#5f7593;
  --chat-line:#e4ecf7;
  --chat-radius:18px;
}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;
  clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* ---------- Back to top ---------- */
.inb-top{
  position:fixed;bottom:24px;z-index:900;width:46px;height:46px;border:0;cursor:pointer;
  border-radius:50%;background:var(--blue,#1f6fe0);color:#fff;display:grid;place-items:center;
  box-shadow:0 10px 26px rgba(31,111,224,.35);opacity:0;transform:translateY(14px);
  transition:opacity .25s,transform .25s,background .2s;
}
.inb-top.inb-right{right:24px}
.inb-top.inb-left{left:24px}
.inb-top[hidden]{display:none}
.inb-top.show{opacity:1;transform:translateY(0)}
.inb-top:hover{background:var(--blue-d,#134a99);transform:translateY(-3px)}
.inb-top:focus-visible{outline:3px solid #fff;outline-offset:3px}
.inb-top svg{width:22px;height:22px;fill:currentColor}

/* ---------- Chat shell ---------- */
.inb-chat{position:fixed;bottom:24px;z-index:950;font-family:'Segoe UI',Roboto,Arial,sans-serif}
.inb-chat.inb-left{left:24px}
.inb-chat.inb-right{right:24px}

/* ---------- Launcher ---------- */
.inb-chat-launcher{
  position:relative;width:60px;height:60px;border:0;cursor:pointer;border-radius:50%;
  background:var(--chat-accent);color:#fff;font-size:26px;line-height:1;
  display:grid;place-items:center;box-shadow:0 14px 34px rgba(31,111,224,.42);
  transition:transform .2s,box-shadow .2s;
}
.inb-chat-launcher:hover{transform:scale(1.06)}
.inb-chat-launcher:focus-visible{outline:3px solid #fff;outline-offset:3px}
.inb-chat-launcher .ic-open,.inb-chat-launcher .ic-close{grid-area:1/1;transition:opacity .18s,transform .18s}
.inb-chat-launcher .ic-close{opacity:0;transform:rotate(-90deg);font-size:22px}
.inb-chat.open .inb-chat-launcher .ic-open{opacity:0;transform:rotate(90deg)}
.inb-chat.open .inb-chat-launcher .ic-close{opacity:1;transform:rotate(0)}

/* attention pulse until the visitor opens it once */
.inb-chat-launcher::after{
  content:'';position:absolute;inset:0;border-radius:50%;
  border:2px solid var(--chat-accent);animation:inb-pulse 2.4s ease-out infinite;
}
.inb-chat.open .inb-chat-launcher::after,
.inb-chat.seen .inb-chat-launcher::after{display:none}
@keyframes inb-pulse{0%{transform:scale(1);opacity:.7}100%{transform:scale(1.55);opacity:0}}

.inb-chat-dot{
  position:absolute;top:2px;right:2px;min-width:20px;height:20px;padding:0 5px;border-radius:10px;
  background:var(--red,#e8402a);color:#fff;font-size:12px;font-weight:700;
  display:grid;place-items:center;box-shadow:0 0 0 3px #fff;
}
.inb-chat-dot[hidden]{display:none}

.inb-chat-teaser{
  position:absolute;bottom:14px;background:#fff;color:var(--chat-ink);font-size:13px;font-weight:600;
  padding:9px 14px;border-radius:12px;box-shadow:0 10px 30px rgba(27,42,74,.16);
  white-space:nowrap;animation:inb-fade .4s ease both;
}
.inb-chat.inb-left  .inb-chat-teaser{left:72px}
.inb-chat.inb-right .inb-chat-teaser{right:72px}
.inb-chat-teaser[hidden]{display:none}
@keyframes inb-fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

/* ---------- Panel ---------- */
.inb-chat-panel{
  position:absolute;bottom:76px;width:370px;max-width:calc(100vw - 32px);
  height:min(540px,calc(100vh - 130px));display:flex;flex-direction:column;overflow:hidden;
  background:#fff;border-radius:var(--chat-radius);border:1px solid var(--chat-line);
  box-shadow:0 26px 70px rgba(27,42,74,.26);
  animation:inb-pop .22s ease both;
}
.inb-chat.inb-left  .inb-chat-panel{left:0}
.inb-chat.inb-right .inb-chat-panel{right:0}
.inb-chat-panel[hidden]{display:none}
@keyframes inb-pop{from{opacity:0;transform:translateY(12px) scale(.97)}to{opacity:1;transform:none}}

/* expanded ("⤢") state — roomier for a long conversation */
.inb-chat.wide .inb-chat-panel{width:min(560px,calc(100vw - 32px));height:min(720px,calc(100vh - 120px))}

.inb-chat-head{
  /* flat colour first: browsers without color-mix() drop the gradient line */
  background:var(--chat-accent);
  background:linear-gradient(135deg,var(--chat-accent),color-mix(in srgb,var(--chat-accent) 62%,#000));
  color:#fff;padding:14px 16px;display:flex;align-items:center;justify-content:space-between;gap:10px;
}
.inb-chat-ident{display:flex;align-items:center;gap:11px;min-width:0}
.inb-chat-av{width:38px;height:38px;border-radius:50%;background:rgba(255,255,255,.2);
  display:grid;place-items:center;font-size:19px;flex:none}
.inb-chat-head strong{display:block;font-size:15px;line-height:1.2}
.inb-chat-head small{display:flex;align-items:center;gap:6px;font-size:12px;opacity:.9;margin-top:2px}
.inb-chat-head small::before{content:'';width:7px;height:7px;border-radius:50%;background:#ffcf5c;flex:none}
.inb-chat-head small.online::before{background:#4ade80;box-shadow:0 0 0 3px rgba(74,222,128,.28)}
.inb-chat-tools{display:flex;gap:4px;flex:none}
.inb-chat-tools button{
  width:30px;height:30px;border:0;border-radius:8px;cursor:pointer;font-size:14px;
  background:rgba(255,255,255,.16);color:#fff;display:grid;place-items:center;transition:.15s;
}
.inb-chat-tools button:hover{background:rgba(255,255,255,.3)}

/* ---------- Message log ---------- */
.inb-chat-log{flex:1;overflow-y:auto;padding:16px;background:#f7fafe;display:flex;flex-direction:column;gap:10px;
  overscroll-behavior:contain;scrollbar-width:thin}
.inb-msg{max-width:82%;padding:10px 13px;border-radius:14px;font-size:14px;line-height:1.5;
  word-wrap:break-word;overflow-wrap:anywhere;animation:inb-fade .2s ease both}
.inb-msg a{color:inherit;text-decoration:underline}
.inb-msg time{display:block;font-size:10.5px;opacity:.65;margin-top:4px}
.inb-msg.them{align-self:flex-start;background:#fff;border:1px solid var(--chat-line);
  color:var(--chat-ink);border-bottom-left-radius:5px}
.inb-msg.me{align-self:flex-end;background:var(--chat-accent);color:#fff;border-bottom-right-radius:5px}
.inb-msg.agent{align-self:flex-start;background:#0f1b30;color:#fff;border-bottom-left-radius:5px}
.inb-msg-who{display:block;font-size:11px;font-weight:700;opacity:.7;margin-bottom:3px;text-transform:uppercase;letter-spacing:.4px}
.inb-msg.err{align-self:center;background:#fdecea;border:1px solid #f5c6c0;color:#a8281a;font-size:13px;max-width:100%}

.inb-typing{align-self:flex-start;display:flex;gap:4px;padding:12px 14px;background:#fff;
  border:1px solid var(--chat-line);border-radius:14px;border-bottom-left-radius:5px}
.inb-typing span{width:7px;height:7px;border-radius:50%;background:#b6c6dd;animation:inb-bounce 1.1s infinite}
.inb-typing span:nth-child(2){animation-delay:.16s}
.inb-typing span:nth-child(3){animation-delay:.32s}
@keyframes inb-bounce{0%,60%,100%{transform:translateY(0);opacity:.55}30%{transform:translateY(-5px);opacity:1}}

/* ---------- Quick replies ---------- */
.inb-chat-quick{display:flex;flex-wrap:wrap;gap:7px;padding:10px 14px 0;background:#f7fafe}
.inb-chat-quick[hidden]{display:none}
.inb-chat-quick button{
  border:1px solid var(--chat-accent);background:#fff;color:var(--chat-accent);cursor:pointer;
  font-size:12.5px;font-weight:600;padding:7px 13px;border-radius:999px;transition:.15s;
}
.inb-chat-quick button:hover{background:var(--chat-accent);color:#fff}

/* ---------- Composer ---------- */
.inb-chat-form{position:relative;display:flex;align-items:flex-end;gap:8px;padding:12px 14px;
  background:#fff;border-top:1px solid var(--chat-line)}
.inb-chat-form textarea{
  flex:1;resize:none;max-height:120px;font-family:inherit;font-size:14px;line-height:1.45;
  padding:11px 13px;border:1px solid var(--chat-line);border-radius:12px;color:var(--chat-ink);background:#f7fafe;
}
.inb-chat-form textarea:focus{outline:0;border-color:var(--chat-accent);background:#fff;
  box-shadow:0 0 0 3px rgba(31,111,224,.14)}
.inb-chat-send{width:42px;height:42px;flex:none;border:0;border-radius:12px;cursor:pointer;
  background:var(--chat-accent);color:#fff;display:grid;place-items:center;transition:.15s}
.inb-chat-send:hover{filter:brightness(1.08)}
.inb-chat-send:disabled{opacity:.5;cursor:not-allowed}
.inb-chat-send svg{width:19px;height:19px;fill:currentColor}
.inb-chat-foot{margin:0;padding:0 14px 10px;background:#fff;color:#9fb0c9;font-size:11px;text-align:center}

/* ---------- Small screens: the panel takes the whole viewport ---------- */
@media (max-width:560px){
  .inb-chat{bottom:16px}
  .inb-chat.inb-left{left:16px}
  .inb-chat.inb-right{right:16px}
  .inb-top{bottom:16px;width:42px;height:42px}
  .inb-top.inb-right{right:16px}
  .inb-top.inb-left{left:16px}
  .inb-chat-teaser{display:none}
  .inb-chat.open .inb-chat-panel,
  .inb-chat.wide .inb-chat-panel{
    position:fixed;inset:0;width:100%;max-width:100%;height:100%;border-radius:0;border:0;
  }
  /* the launcher would sit on top of a full-screen panel */
  .inb-chat.open .inb-chat-launcher{display:none}
  .inb-chat-head{padding-top:max(14px,env(safe-area-inset-top))}
}

@media (prefers-reduced-motion:reduce){
  .inb-chat *,.inb-top{animation:none!important;transition:none!important}
}