.tax-assistant-root {
  --ta-ink: #10243d;
  --ta-muted: #5e6b78;
  --ta-teal: #007f89;
  --ta-line: #dbe5ec;
  --ta-paper: #fff;
  position: fixed;
  z-index: 80;
  right: max(18px, env(safe-area-inset-right));
  bottom: max(18px, env(safe-area-inset-bottom));
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ta-ink);
}

.tax-assistant-root .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;
}

.tax-assistant-launcher {
  min-height: 50px;
  padding: 0 18px;
  border: 0;
  border-radius: 999px;
  background: var(--ta-ink);
  color: #fff;
  box-shadow: 0 12px 32px rgba(16, 36, 61, .22);
  cursor: pointer;
  font: inherit;
  font-weight: 750;
}

.tax-assistant-panel {
  position: absolute;
  right: 0;
  bottom: 62px;
  width: min(390px, calc(100vw - 28px));
  max-height: min(680px, calc(100vh - 100px));
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  overflow: hidden;
  border: 1px solid var(--ta-line);
  border-radius: 14px;
  background: var(--ta-paper);
  box-shadow: 0 24px 64px rgba(16, 36, 61, .2);
}

.tax-assistant-panel[hidden] { display: none; }
.tax-assistant-header { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 15px 16px; border-bottom: 1px solid var(--ta-line); }
.tax-assistant-title { margin: 0; font-size: 1rem; }
.tax-assistant-header-actions { display: flex; gap: 5px; }
.tax-assistant-icon-button { border: 0; border-radius: 8px; background: transparent; color: var(--ta-muted); padding: 7px; cursor: pointer; font: inherit; }
.tax-assistant-icon-button:hover, .tax-assistant-icon-button:focus-visible { background: #f3f6f8; color: var(--ta-ink); }
.tax-assistant-body { overflow-y: auto; padding: 15px; background: #f7f9fa; }
.tax-assistant-notice { margin: 0 0 12px; padding: 10px; border-radius: 8px; background: #fff7df; color: #5c4817; font-size: .78rem; line-height: 1.5; }
.tax-assistant-quick { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 13px; }
.tax-assistant-quick button { border: 1px solid #c8d9df; border-radius: 999px; background: #fff; color: var(--ta-ink); padding: 7px 10px; cursor: pointer; font: inherit; font-size: .78rem; }
.tax-assistant-message { max-width: 88%; margin: 9px 0; padding: 10px 12px; border-radius: 11px; background: #fff; font-size: .88rem; line-height: 1.55; white-space: pre-wrap; overflow-wrap: anywhere; }
.tax-assistant-message.user { margin-left: auto; background: #dff3f4; }
.tax-assistant-sources { margin: 8px 0 0; padding: 0; list-style: none; }
.tax-assistant-sources li + li { margin-top: 4px; }
.tax-assistant-sources a { color: var(--ta-teal); text-decoration: underline; font-size: .78rem; }
.tax-assistant-form { padding: 12px; border-top: 1px solid var(--ta-line); background: #fff; }
.tax-assistant-form textarea { display: block; width: 100%; min-height: 70px; max-height: 130px; resize: vertical; border: 1px solid #bdcdd6; border-radius: 9px; padding: 10px; color: var(--ta-ink); font: inherit; font-size: .9rem; }
.tax-assistant-form-row { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-top: 8px; }
.tax-assistant-count { color: var(--ta-muted); font-size: .72rem; }
.tax-assistant-send { border: 0; border-radius: 8px; background: var(--ta-teal); color: #fff; padding: 9px 15px; cursor: pointer; font: inherit; font-weight: 750; }
.tax-assistant-send:disabled { opacity: .55; cursor: wait; }
.tax-assistant-status { min-height: 1.2em; margin: 7px 0 0; color: #a33a2d; font-size: .76rem; }

@media (max-width: 520px) {
  .tax-assistant-root { right: 10px; bottom: max(10px, env(safe-area-inset-bottom)); }
  .tax-assistant-panel { position: fixed; inset: 8px 8px max(70px, env(safe-area-inset-bottom)) 8px; width: auto; max-height: none; }
  .tax-assistant-launcher { min-height: 48px; padding-inline: 15px; }
}

@media (prefers-reduced-motion: reduce) {
  .tax-assistant-root * { scroll-behavior: auto !important; }
}