#paifab {
  position: fixed;
  left: 16px;
  bottom: 16px;
  z-index: 9999;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
}

/* küçük yuvarlak ikon */
#paifab .paifab-btn {
  width: 46px; height: 46px;
  border-radius: 999px;
  border: none; cursor: pointer;
  background: #111; color: #fff;
  box-shadow: 0 6px 20px rgba(0,0,0,.25);
  display: flex; align-items: center; justify-content: center;
}

/* panel */
#paifab .paifab-panel {
  position: absolute;
  left: 0; bottom: 56px;
  width: min(340px, 94vw);
  max-height: 520px;
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 14px;
  box-shadow: 0 16px 40px rgba(0,0,0,.18);
  display: none;
  overflow: hidden;
}

#paifab.open .paifab-panel {
  display: grid;
  grid-template-rows: auto 1fr;
}

/* header */
.paifab-header {
  padding: 10px 12px;
  background: #111; color: #fff;
  display: flex; align-items: center; justify-content: space-between;
}
.paifab-header .paifab-close {
  background: transparent; border: none; color: #fff;
  font-weight: bold; font-size: 18px; cursor: pointer;
}

/* body */
.paifab-body {
  display: grid; grid-template-rows: 1fr auto;
  gap: 8px; padding: 10px;
}

/* chat alanı */
.paifab-chat {
  overflow: auto;
  display: grid; gap: 8px;
  padding-right: 4px;
  max-height: 380px;
}
.paifab-msg {
  padding: 8px 10px; border-radius: 10px;
  font-size: 14px; line-height: 1.35;
}
.paifab-msg.user {
  background: #e6f0ff; justify-self: end;
}
.paifab-msg.ai {
  background: #f3f4f6; justify-self: start;
}

/* input satırı */
.paifab-inputrow {
  display: grid; grid-template-columns: 1fr auto; gap: 8px;
}
.paifab-input {
  border: 1px solid #e5e7eb; border-radius: 10px;
  padding: 10px; font-size: 14px; outline: none;
}
.paifab-send {
  padding: 10px 14px; border-radius: 10px; border: none;
  cursor: pointer; background: #111; color: #fff;
}
.paifab-send:disabled { opacity: .6; cursor: not-allowed; }