.niw-ai-support {
  --ai-ink: #102033;
  --ai-muted: #667085;
  --ai-line: #d8e1e8;
  --ai-soft: #f5f7f8;
  --ai-green: #0d7561;
  --ai-green-dark: #085643;
  position: fixed;
  right: 20px;
  bottom: max(20px, env(safe-area-inset-bottom));
  z-index: 12000;
  color: var(--ai-ink);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}

.niw-ai-support,
.niw-ai-support * {
  box-sizing: border-box;
}

.niw-ai-launcher {
  min-width: 132px;
  min-height: 48px;
  padding: 0 16px;
  border: 1px solid rgba(255, 255, 255, .28);
  border-radius: 8px;
  background: #113f36;
  color: #fff;
  box-shadow: 0 12px 30px rgba(7, 20, 38, .24);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  font: inherit;
  font-size: 15px;
  font-weight: 760;
  cursor: pointer;
}

.niw-ai-launcher:hover {
  background: #0a5949;
}

.niw-ai-launcher-badge {
  width: 25px;
  height: 25px;
  border: 1px solid rgba(255, 255, 255, .72);
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  line-height: 1;
}

.niw-ai-panel {
  width: min(390px, calc(100vw - 32px));
  height: min(650px, calc(100vh - 48px));
  margin-bottom: 10px;
  border: 1px solid var(--ai-line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 24px 64px rgba(7, 20, 38, .24);
  overflow: hidden;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
}

.niw-ai-panel[hidden],
.niw-ai-launcher[hidden] {
  display: none;
}

.niw-ai-header {
  min-height: 64px;
  padding: 12px 14px 12px 16px;
  border-bottom: 1px solid var(--ai-line);
  background: #102033;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.niw-ai-header strong,
.niw-ai-header span {
  display: block;
}

.niw-ai-header strong {
  font-size: 16px;
}

.niw-ai-header span {
  margin-top: 2px;
  color: #cbd5df;
  font-size: 12px;
}

.niw-ai-close {
  width: 38px;
  height: 38px;
  padding: 0;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: #fff;
  font: inherit;
  font-size: 25px;
  line-height: 1;
  cursor: pointer;
}

.niw-ai-close:hover {
  background: rgba(255, 255, 255, .1);
}

.niw-ai-messages {
  padding: 16px;
  overflow-y: auto;
  overscroll-behavior: contain;
  background: #f7f8fa;
}

.niw-ai-message {
  max-width: 92%;
  margin: 0 0 12px;
  padding: 11px 12px;
  border: 1px solid var(--ai-line);
  border-radius: 8px;
  background: #fff;
  color: var(--ai-ink);
  font-size: 14px;
  line-height: 1.62;
  white-space: pre-wrap;
}

.niw-ai-message-user {
  margin-left: auto;
  border-color: #b7d8cf;
  background: #eaf5f1;
}

.niw-ai-message-boundary {
  border-left: 3px solid #a9792b;
}

.niw-ai-message-system {
  max-width: 100%;
  border-color: #d7dce2;
  background: #eef1f4;
  color: #3f4d5d;
  font-size: 12px;
}

.niw-ai-source {
  margin-top: 8px;
  color: var(--ai-muted);
  font-size: 12px;
}

.niw-ai-quick-label {
  margin: 2px 0 8px;
  color: var(--ai-muted);
  font-size: 12px;
  font-weight: 700;
}

.niw-ai-quick-list {
  display: grid;
  gap: 7px;
  margin-bottom: 14px;
}

.niw-ai-quick {
  min-height: 39px;
  padding: 7px 10px;
  border: 1px solid #cbd8df;
  border-radius: 6px;
  background: #fff;
  color: #21483f;
  font: inherit;
  font-size: 13px;
  line-height: 1.4;
  text-align: left;
  cursor: pointer;
}

.niw-ai-quick:hover {
  border-color: var(--ai-green);
  background: #f0f8f5;
}

.niw-ai-feedback {
  margin: -5px 0 14px;
  padding-left: 4px;
}

.niw-ai-feedback-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 7px;
  color: var(--ai-muted);
  font-size: 12px;
}

.niw-ai-feedback button {
  min-height: 30px;
  padding: 4px 8px;
  border: 1px solid var(--ai-line);
  border-radius: 5px;
  background: #fff;
  color: #344054;
  font: inherit;
  font-size: 12px;
  cursor: pointer;
}

.niw-ai-feedback button:hover {
  border-color: var(--ai-green);
  color: var(--ai-green-dark);
}

.niw-ai-feedback-detail {
  margin-top: 8px;
}

.niw-ai-feedback-detail textarea {
  width: 100%;
  min-height: 62px;
  padding: 8px;
  border: 1px solid var(--ai-line);
  border-radius: 5px;
  resize: vertical;
  color: var(--ai-ink);
  font: inherit;
  font-size: 12px;
}

.niw-ai-feedback-status {
  margin-top: 6px;
  color: var(--ai-muted);
  font-size: 12px;
}

.niw-ai-composer {
  padding: 12px;
  border-top: 1px solid var(--ai-line);
  background: #fff;
}

.niw-ai-input-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 44px;
  align-items: end;
  gap: 8px;
}

.niw-ai-input {
  width: 100%;
  min-height: 46px;
  max-height: 112px;
  padding: 10px 11px;
  border: 1px solid #bfcbd4;
  border-radius: 6px;
  resize: none;
  color: var(--ai-ink);
  background: #fff;
  font: inherit;
  font-size: 14px;
  line-height: 1.45;
}

.niw-ai-input:focus {
  outline: 2px solid rgba(13, 117, 97, .2);
  border-color: var(--ai-green);
}

.niw-ai-send {
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--ai-green);
  border-radius: 6px;
  background: var(--ai-green);
  color: #fff;
  font: inherit;
  font-size: 21px;
  cursor: pointer;
}

.niw-ai-send:hover {
  background: var(--ai-green-dark);
}

.niw-ai-send:disabled {
  opacity: .45;
  cursor: not-allowed;
}

.niw-ai-composer-meta {
  min-height: 17px;
  margin-top: 6px;
  display: flex;
  justify-content: space-between;
  gap: 10px;
  color: var(--ai-muted);
  font-size: 11px;
}

.niw-ai-links {
  margin-top: 8px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.niw-ai-links a {
  color: var(--ai-green-dark);
  font-size: 12px;
  font-weight: 700;
}

body.niw-ai-assessment .niw-ai-support {
  right: 20px;
  left: auto;
}

@media (max-width: 600px) {
  .niw-ai-support,
  body.niw-ai-assessment .niw-ai-support {
    right: 12px;
    left: auto;
    top: auto;
    bottom: max(12px, env(safe-area-inset-bottom));
  }

  .niw-ai-launcher {
    min-width: 116px;
    min-height: 44px;
    float: none;
  }

  body.niw-ai-assessment .niw-ai-launcher,
  body.niw-content-page .niw-ai-launcher,
  body.niw-ebook-page .niw-ai-launcher {
    width: 48px;
    min-width: 48px;
    height: 48px;
    min-height: 48px;
    padding: 0;
    border-radius: 50%;
    gap: 0;
  }

  body.niw-ai-assessment .niw-ai-launcher > span:last-child,
  body.niw-content-page .niw-ai-launcher > span:last-child,
  body.niw-ebook-page .niw-ai-launcher > span:last-child {
    display: none;
  }

  body.niw-ai-assessment .niw-ai-launcher-badge,
  body.niw-content-page .niw-ai-launcher-badge,
  body.niw-ebook-page .niw-ai-launcher-badge {
    width: 28px;
    height: 28px;
  }

  .niw-ai-panel {
    width: 100%;
    height: min(620px, calc(100dvh - 24px));
    margin-bottom: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .niw-ai-support *,
  .niw-ai-support *::before,
  .niw-ai-support *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}