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Add prefers-color-scheme dark mode support #106

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3 changes: 3 additions & 0 deletions src/claude_code_transcripts/__init__.py
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Expand Up @@ -973,6 +973,9 @@ def render_message(log_type, message_json, timestamp):

CSS = """
:root { --bg-color: #f5f5f5; --card-bg: #ffffff; --user-bg: #e3f2fd; --user-border: #1976d2; --assistant-bg: #f5f5f5; --assistant-border: #9e9e9e; --thinking-bg: #fff8e1; --thinking-border: #ffc107; --thinking-text: #666; --tool-bg: #f3e5f5; --tool-border: #9c27b0; --tool-result-bg: #e8f5e9; --tool-error-bg: #ffebee; --text-color: #212121; --text-muted: #757575; --code-bg: #263238; --code-text: #aed581; }
@media (prefers-color-scheme: dark) {
:root { --bg-color: #1a1a1a; --card-bg: #2a2a2a; --user-bg: #1a3a52; --user-border: #4a9eff; --assistant-bg: #262626; --assistant-border: #8a8a8a; --thinking-bg: #3a3420; --thinking-border: #ffc107; --thinking-text: #bbbbbb; --tool-bg: #3a2a42; --tool-border: #ce93d8; --tool-result-bg: #1b3a24; --tool-error-bg: #4a1f1f; --text-color: #e0e0e0; --text-muted: #a0a0a0; --code-bg: #111111; --code-text: #aed581; }
}
* { box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background: var(--bg-color); color: var(--text-color); margin: 0; padding: 16px; line-height: 1.6; }
.container { max-width: 800px; margin: 0 auto; }
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3 changes: 3 additions & 0 deletions tests/__snapshots__/test_generate_html/TestGenerateHtml.test_generates_index_html.html
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Expand Up @@ -6,6 +6,9 @@
<title>Claude Code transcript - Index</title>
<style>
:root { --bg-color: #f5f5f5; --card-bg: #ffffff; --user-bg: #e3f2fd; --user-border: #1976d2; --assistant-bg: #f5f5f5; --assistant-border: #9e9e9e; --thinking-bg: #fff8e1; --thinking-border: #ffc107; --thinking-text: #666; --tool-bg: #f3e5f5; --tool-border: #9c27b0; --tool-result-bg: #e8f5e9; --tool-error-bg: #ffebee; --text-color: #212121; --text-muted: #757575; --code-bg: #263238; --code-text: #aed581; }
@media (prefers-color-scheme: dark) {
:root { --bg-color: #1a1a1a; --card-bg: #2a2a2a; --user-bg: #1a3a52; --user-border: #4a9eff; --assistant-bg: #262626; --assistant-border: #8a8a8a; --thinking-bg: #3a3420; --thinking-border: #ffc107; --thinking-text: #bbbbbb; --tool-bg: #3a2a42; --tool-border: #ce93d8; --tool-result-bg: #1b3a24; --tool-error-bg: #4a1f1f; --text-color: #e0e0e0; --text-muted: #a0a0a0; --code-bg: #111111; --code-text: #aed581; }
}
* { box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background: var(--bg-color); color: var(--text-color); margin: 0; padding: 16px; line-height: 1.6; }
.container { max-width: 800px; margin: 0 auto; }
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3 changes: 3 additions & 0 deletions tests/__snapshots__/test_generate_html/TestGenerateHtml.test_generates_page_001_html.html
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Expand Up @@ -6,6 +6,9 @@
<title>Claude Code transcript - page 1</title>
<style>
:root { --bg-color: #f5f5f5; --card-bg: #ffffff; --user-bg: #e3f2fd; --user-border: #1976d2; --assistant-bg: #f5f5f5; --assistant-border: #9e9e9e; --thinking-bg: #fff8e1; --thinking-border: #ffc107; --thinking-text: #666; --tool-bg: #f3e5f5; --tool-border: #9c27b0; --tool-result-bg: #e8f5e9; --tool-error-bg: #ffebee; --text-color: #212121; --text-muted: #757575; --code-bg: #263238; --code-text: #aed581; }
@media (prefers-color-scheme: dark) {
:root { --bg-color: #1a1a1a; --card-bg: #2a2a2a; --user-bg: #1a3a52; --user-border: #4a9eff; --assistant-bg: #262626; --assistant-border: #8a8a8a; --thinking-bg: #3a3420; --thinking-border: #ffc107; --thinking-text: #bbbbbb; --tool-bg: #3a2a42; --tool-border: #ce93d8; --tool-result-bg: #1b3a24; --tool-error-bg: #4a1f1f; --text-color: #e0e0e0; --text-muted: #a0a0a0; --code-bg: #111111; --code-text: #aed581; }
}
* { box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background: var(--bg-color); color: var(--text-color); margin: 0; padding: 16px; line-height: 1.6; }
.container { max-width: 800px; margin: 0 auto; }
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3 changes: 3 additions & 0 deletions tests/__snapshots__/test_generate_html/TestGenerateHtml.test_generates_page_002_html.html
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Expand Up @@ -6,6 +6,9 @@
<title>Claude Code transcript - page 2</title>
<style>
:root { --bg-color: #f5f5f5; --card-bg: #ffffff; --user-bg: #e3f2fd; --user-border: #1976d2; --assistant-bg: #f5f5f5; --assistant-border: #9e9e9e; --thinking-bg: #fff8e1; --thinking-border: #ffc107; --thinking-text: #666; --tool-bg: #f3e5f5; --tool-border: #9c27b0; --tool-result-bg: #e8f5e9; --tool-error-bg: #ffebee; --text-color: #212121; --text-muted: #757575; --code-bg: #263238; --code-text: #aed581; }
@media (prefers-color-scheme: dark) {
:root { --bg-color: #1a1a1a; --card-bg: #2a2a2a; --user-bg: #1a3a52; --user-border: #4a9eff; --assistant-bg: #262626; --assistant-border: #8a8a8a; --thinking-bg: #3a3420; --thinking-border: #ffc107; --thinking-text: #bbbbbb; --tool-bg: #3a2a42; --tool-border: #ce93d8; --tool-result-bg: #1b3a24; --tool-error-bg: #4a1f1f; --text-color: #e0e0e0; --text-muted: #a0a0a0; --code-bg: #111111; --code-text: #aed581; }
}
* { box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background: var(--bg-color); color: var(--text-color); margin: 0; padding: 16px; line-height: 1.6; }
.container { max-width: 800px; margin: 0 auto; }
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3 changes: 3 additions & 0 deletions tests/__snapshots__/test_generate_html/TestParseSessionFile.test_jsonl_generates_html.html
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Expand Up @@ -6,6 +6,9 @@
<title>Claude Code transcript - Index</title>
<style>
:root { --bg-color: #f5f5f5; --card-bg: #ffffff; --user-bg: #e3f2fd; --user-border: #1976d2; --assistant-bg: #f5f5f5; --assistant-border: #9e9e9e; --thinking-bg: #fff8e1; --thinking-border: #ffc107; --thinking-text: #666; --tool-bg: #f3e5f5; --tool-border: #9c27b0; --tool-result-bg: #e8f5e9; --tool-error-bg: #ffebee; --text-color: #212121; --text-muted: #757575; --code-bg: #263238; --code-text: #aed581; }
@media (prefers-color-scheme: dark) {
:root { --bg-color: #1a1a1a; --card-bg: #2a2a2a; --user-bg: #1a3a52; --user-border: #4a9eff; --assistant-bg: #262626; --assistant-border: #8a8a8a; --thinking-bg: #3a3420; --thinking-border: #ffc107; --thinking-text: #bbbbbb; --tool-bg: #3a2a42; --tool-border: #ce93d8; --tool-result-bg: #1b3a24; --tool-error-bg: #4a1f1f; --text-color: #e0e0e0; --text-muted: #a0a0a0; --code-bg: #111111; --code-text: #aed581; }
}
* { box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background: var(--bg-color); color: var(--text-color); margin: 0; padding: 16px; line-height: 1.6; }
.container { max-width: 800px; margin: 0 auto; }
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13 changes: 13 additions & 0 deletions tests/test_generate_html.py
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Expand Up @@ -1616,6 +1616,19 @@ def test_search_css_present(self, output_dir):
# CSS should style the search modal
assert "#search-modal" in index_html or ".search-modal" in index_html

def test_dark_mode_media_query_present(self, output_dir):
"""Test that CSS includes a prefers-color-scheme dark mode override."""
fixture_path = Path(__file__).parent / "sample_session.json"
generate_html(fixture_path, output_dir, github_repo="example/project")

index_html = (output_dir / "index.html").read_text(encoding="utf-8")

assert "@media (prefers-color-scheme: dark)" in index_html
# The dark override should redefine the same custom properties
# used by the light :root block, not introduce unrelated ones.
assert "--bg-color" in index_html
assert "--text-color" in index_html

def test_search_box_hidden_by_default_in_css(self, output_dir):
"""Test that search box is hidden by default (for progressive enhancement)."""
fixture_path = Path(__file__).parent / "sample_session.json"
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