.fd-support-root {
  --fd-support-blue: #1976d2;
  --fd-support-border: #d9e4ef;
  --fd-support-text: #142033;
  position: fixed;
  z-index: 2147483000;
  right: 20px;
  bottom: 20px;
  color: var(--fd-support-text);
  font-family: Inter, "Segoe UI", Arial, sans-serif;
  line-height: 1.45;
}

.fd-support-launcher {
  position: relative;
  display: block;
  width: 123px;
  height: 123px;
  padding: 0;
  overflow: hidden;
  border: 2px solid #70b8ff;
  border-radius: 50%;
  background: var(--fd-support-blue);
  box-shadow: 0 16px 38px rgba(12, 65, 115, 0.3);
  cursor: pointer;
  transition: transform 150ms ease, border-color 150ms ease, background 150ms ease;
}

.fd-support-launcher:hover {
  transform: translateY(-2px);
  border-color: #b7dcff;
  background: #2b8ae8;
}

.fd-support-launcher:active { opacity: 0.88; }
.fd-support-launcher[hidden] { display: none; }

.fd-support-launcher img {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 150%;
  height: 150%;
  max-width: none;
  transform: translate(-50%, -46%);
  object-fit: cover;
}

.fd-support-panel {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto auto;
  width: min(430px, calc(100vw - 24px));
  height: min(640px, calc(100dvh - 24px));
  overflow: hidden;
  border: 1px solid var(--fd-support-border);
  border-radius: 12px;
  background: #fff;
  box-shadow: 0 24px 70px rgba(15, 38, 62, 0.32);
}

.fd-support-panel[hidden] { display: none; }

.fd-support-header {
  position: relative;
  display: grid;
  grid-template-columns: 156px minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  min-height: 156px;
  padding: 8px 12px 0 14px;
  border-bottom: 1px solid var(--fd-support-border);
  background: #f7fafd;
}

.fd-support-portrait-wrap {
  position: relative;
  width: 156px;
  height: 156px;
}

.fd-support-portrait {
  display: block;
  box-sizing: border-box;
  width: 156px;
  height: 156px;
  border: 3px solid #1876d2;
  border-radius: 0;
  background: #fff;
  object-fit: contain;
}

.fd-support-emotion-badge {
  position: absolute;
  right: -1px;
  bottom: -1px;
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border: 2px solid #fff;
  border-radius: 50%;
  background: var(--fd-support-blue);
  color: #fff;
  font-size: 16px;
  font-weight: 700;
}

.fd-support-heading { min-width: 0; padding-right: 44px; }
.fd-support-title { margin: 0; color: #142033; font-size: 17px; font-weight: 600; }
.fd-support-status { margin-top: 2px; color: #64748b; font-size: 12px; }
.fd-support-emotion-text { margin-top: 2px; color: var(--fd-support-blue); font-size: 11px; }

.fd-support-header-actions {
  display: contents;
}

.fd-support-small-button,
.fd-support-send-button {
  border: 1px solid #cbd8e6;
  border-radius: 6px;
  background: #fff;
  color: #203047;
  font: inherit;
  cursor: pointer;
}

.fd-support-small-button { min-width: 58px; padding: 6px 8px; font-size: 12px; }
.fd-support-small-button:hover { background: #edf6ff; }
.fd-support-header-actions > .fd-support-small-button:not(.fd-support-close) {
  position: absolute;
  top: 52px;
  right: 10px;
}
.fd-support-close {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 34px;
  min-width: 34px;
  height: 34px;
  padding: 0;
  font-size: 18px;
  line-height: 1;
}

.fd-support-messages-wrap {
  position: relative;
  min-height: 0;
  overflow: hidden;
}

.fd-support-messages {
  height: 100%;
  overflow-y: auto;
  padding: 14px 14px 76px;
  overscroll-behavior: contain;
}

.fd-support-empty {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  color: #64748b;
  text-align: center;
  pointer-events: none;
}

.fd-support-empty[hidden] { display: none; }
.fd-support-message-row { display: flex; margin: 0 0 12px; }
.fd-support-message-row--user { justify-content: flex-end; }
.fd-support-message-row--assistant { justify-content: flex-start; }
.fd-support-message-stack { display: flex; max-width: 300px; flex-direction: column; gap: 3px; }
.fd-support-message-row--user .fd-support-message-stack { align-items: flex-end; }
.fd-support-message-row--assistant .fd-support-message-stack { align-items: flex-start; }

.fd-support-message {
  max-width: 300px;
  padding: 9px 12px;
  border-radius: 12px;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  user-select: text;
  font-size: 14px;
}

.fd-support-message-row--user .fd-support-message { background: var(--fd-support-blue); color: #fff; }
.fd-support-message-row--assistant .fd-support-message { border: 1px solid #dfe7f0; background: #f1f5f9; color: #162033; }
.fd-support-time { color: #8793a4; font-size: 10px; }

.fd-support-thinking::after {
  content: "";
  display: inline-block;
  width: 3em;
  white-space: nowrap;
  animation: fd-support-dots 1.1s steps(4, end) infinite;
}

.fd-support-message a {
  color: #0b64bd;
  text-decoration: underline;
  overflow-wrap: anywhere;
}

.fd-support-message-row--user .fd-support-message a { color: #fff; }

@keyframes fd-support-dots {
  0% { content: ""; }
  25% { content: "・"; }
  50% { content: "・・"; }
  75%, 100% { content: "・・・"; }
}

.fd-support-composer {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
  align-items: end;
  padding: 10px;
  border-top: 1px solid var(--fd-support-border);
  background: #fafcfe;
}

.fd-support-input {
  box-sizing: border-box;
  width: 100%;
  min-height: 84px;
  max-height: 160px;
  resize: none;
  padding: 9px 10px;
  border: 1px solid #b9c9d9;
  border-radius: 6px;
  background: #fff;
  color: #162033;
  font: inherit;
  line-height: 1.4;
}

.fd-support-input:focus { border-color: var(--fd-support-blue); outline: 2px solid rgba(25, 118, 210, 0.18); }
.fd-support-send-button { min-width: 76px; padding: 7px 12px; }
.fd-support-send-button:enabled { border-color: var(--fd-support-blue); background: var(--fd-support-blue); color: #fff; }
.fd-support-send-button:disabled { cursor: default; opacity: 0.55; }

.fd-support-notice {
  padding: 6px 10px;
  background: #edf6ff;
  color: #4b6580;
  text-align: center;
  font-size: 10px;
}

@media (max-width: 600px) {
  .fd-support-root { right: 10px; bottom: 10px; }
  .fd-support-panel { position: fixed; inset: 0; width: 100vw; height: 100dvh; border: 0; border-radius: 0; }
  .fd-support-header { grid-template-columns: 140px minmax(0, 1fr); min-height: 140px; padding-left: 8px; }
  .fd-support-portrait-wrap,
  .fd-support-portrait { width: 140px; height: 140px; }
  .fd-support-heading { padding-right: 42px; }
}

@media (prefers-reduced-motion: reduce) {
  .fd-support-launcher { transition: none; }
  .fd-support-thinking::after { animation: none; content: "・・・"; }
}