chore: import upstream snapshot with attribution

docs/css/banner.css

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+/* Banner styling -- improve readability with better contrast */
+#banner {
+  background: #f1f5f9 !important;
+  color: #1e293b !important;
+  font-size: 0.95rem !important;
+  font-weight: 600 !important;
+  padding-top: 12px !important;
+  padding-bottom: 12px !important;
+  overflow: hidden !important;
+}
+
+#banner::before {
+  content: "";
+  position: absolute;
+  top: 0;
+  left: 0;
+  width: 100%;
+  height: 100%;
+  background: linear-gradient(
+    90deg,
+    rgba(6, 182, 212, 0.25) 0%,
+    rgba(6, 182, 212, 0.05) 25%,
+    rgba(6, 182, 212, 0.35) 50%,
+    rgba(6, 182, 212, 0.08) 75%,
+    rgba(6, 182, 212, 0.28) 100%
+  );
+  background-size: 300% 100%;
+  animation: colorWave 14s ease-in-out infinite alternate;
+  pointer-events: none;
+}
+
+.dark #banner {
+  background: #475569 !important;
+  color: #f1f5f9 !important;
+}
+
+.dark #banner::before {
+  background: linear-gradient(
+    90deg,
+    rgba(247, 37, 133, 0.35) 0%,
+    rgba(247, 37, 133, 0.08) 25%,
+    rgba(247, 37, 133, 0.45) 50%,
+    rgba(247, 37, 133, 0.12) 75%,
+    rgba(247, 37, 133, 0.38) 100%
+  );
+  background-size: 300% 100%;
+}
+
+@keyframes colorWave {
+  0% {
+    background-position: 0% 0%;
+  }
+  100% {
+    background-position: 100% 0%;
+  }
+}
+
+#banner * {
+  color: #1e293b !important;
+  margin: 0 !important;
+}
+
+.dark #banner * {
+  color: #f1f5f9 !important;
+}
+
+@media (max-width: 767px) {
+  #banner {
+    font-size: 0.8rem !important;
+    padding-top: 8px !important;
+    padding-bottom: 8px !important;
+  }
+}
+

docs/css/python-sdk.css

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+a:has(svg.icon) {
+  border: none !important;
+}

docs/css/style.css

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+html:not([data-page-mode="wide"]) #content-area {
+  max-width: 44rem !important;
+}
+
+img.nav-logo {
+  max-width: 200px;
+}
+
+/* Code highlighting -- target only inline code elements, not code blocks */
+p code:not(pre code),
+table code:not(pre code),
+.prose code:not(pre code),
+li code:not(pre code),
+h1 code:not(pre code),
+h2 code:not(pre code),
+h3 code:not(pre code),
+h4 code:not(pre code),
+h5 code:not(pre code),
+h6 code:not(pre code) {
+  color: #f72585 !important;
+  background-color: rgba(247, 37, 133, 0.09);
+}
+
+/* V2 banner - inside content-container, breaks out of padding with negative margins */
+#v2-banner {
+  display: block;
+  background: linear-gradient(135deg, #4cc9f0 0%, #2d00f7 100%);
+  color: white;
+  text-align: center;
+  padding: 10px 16px;
+  font-size: 0.875rem;
+  font-weight: 600;
+  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
+  margin: -2rem -2rem 1.5rem -2rem;
+  width: calc(100% + 4rem);
+  border-radius: 8px 8px 0 0;
+}
+
+#v2-banner a {
+  color: white;
+  text-decoration: underline;
+  font-weight: 700;
+}
+
+#v2-banner a:hover {
+  opacity: 0.9;
+}
+
+@media (min-width: 1024px) {
+  #v2-banner {
+    margin: -3rem -4rem 1.5rem -4rem;
+    width: calc(100% + 8rem);
+  }
+}
+
+.dark #v2-banner {
+  background: linear-gradient(135deg, #2d00f7 0%, #4cc9f0 100%);
+}
+
+
+
+
+

docs/css/version-badge.css

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+/* Version badge -- display a badge with the current version of the documentation */
+.version-badge {
+  --color-text: #ff5400 !important;
+  --color-bg: #fef2f2 !important;
+  color: #ff5400 !important;
+  background: #fef2f2 !important;
+  border: 1px solid rgba(220, 38, 38, 0.3) !important;
+  transition: box-shadow 0.2s, transform 0.15s;
+}
+
+.version-badge:hover {
+  box-shadow: 0 2px 8px 0 rgba(160, 132, 252, 0.1);
+  transform: translateY(-1px) scale(1.03);
+}
+
+.dark .version-badge {
+  --color-text: #f1f5f9 !important;
+  --color-bg: #334155 !important;
+  color: #f1f5f9 !important;
+  background: #334155 !important;
+  border: 1px solid #64748b !important;
+}
+