feat: global styles with Tabler dark theme, 3-column layout

frontend/src/styles/globals.css

@@ -0,0 +1,300 @@
+/* Tabler CSS imports */
+@import "@tabler/core/dist/css/tabler.min.css";
+@import "@tabler/core/dist/css/tabler-vendors.min.css";
+
+/* Force dark theme */
+:root {
+  color-scheme: dark;
+}
+
+/* Base styles */
+body {
+  background: #1a1a2e;
+  color: #e0e0e0;
+  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell,
+    "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif;
+  margin: 0;
+  overflow: hidden;
+  height: 100vh;
+}
+
+#root {
+  height: 100vh;
+  display: flex;
+}
+
+/* ============================================================
+   3-COLUMN LAYOUT
+   ============================================================ */
+
+.app-layout {
+  display: flex;
+  width: 100%;
+  height: 100vh;
+}
+
+/* Left sidebar */
+.sidebar {
+  width: 240px;
+  min-width: 240px;
+  background: #16213e;
+  border-right: 1px solid #2a2a4a;
+  display: flex;
+  flex-direction: column;
+  overflow-y: auto;
+}
+
+/* Centre chat panel */
+.chat-panel {
+  flex: 1;
+  display: flex;
+  flex-direction: column;
+  min-width: 0;
+}
+
+/* Right panel */
+.right-panel {
+  width: 45%;
+  min-width: 300px;
+  background: #16213e;
+  border-left: 1px solid #2a2a4a;
+  display: flex;
+  flex-direction: column;
+}
+
+/* ============================================================
+   SIDEBAR COMPONENTS
+   ============================================================ */
+
+.sidebar-header {
+  padding: 1rem;
+  border-bottom: 1px solid #2a2a4a;
+}
+
+.sidebar-header h3 {
+  font-size: 0.9rem;
+  text-transform: uppercase;
+  color: #8888aa;
+  letter-spacing: 0.08em;
+  margin: 0;
+}
+
+.session-list {
+  flex: 1;
+  overflow-y: auto;
+}
+
+.session-item {
+  padding: 0.6rem 0.8rem;
+  border-radius: 6px;
+  cursor: pointer;
+  font-size: 0.85rem;
+  color: #c0c0d0;
+}
+
+.session-item:hover {
+  background: #1e2a4a;
+}
+
+.session-item.active {
+  background: #2a3a5a;
+  color: #fff;
+}
+
+.session-meta {
+  font-size: 0.7rem;
+  color: #6a6a8a;
+}
+
+/* ============================================================
+   CHAT COMPONENTS
+   ============================================================ */
+
+.chat-messages {
+  flex: 1;
+  overflow-y: auto;
+  padding: 1rem;
+}
+
+.chat-message {
+  max-width: 85%;
+  margin-bottom: 0.75rem;
+}
+
+.chat-message.user {
+  margin-left: auto;
+  background: #2a3a6a;
+  border-radius: 12px 12px 4px 12px;
+  padding: 0.8rem 1rem;
+}
+
+.chat-message.assistant {
+  background: #1e2a4a;
+  border-radius: 12px 12px 12px 4px;
+  padding: 0.8rem 1rem;
+}
+
+.chat-message.assistant p {
+  margin: 0.3rem 0;
+  line-height: 1.5;
+}
+
+.chat-input-area {
+  padding: 1rem;
+  border-top: 1px solid #2a2a4a;
+  display: flex;
+  gap: 0.5rem;
+}
+
+.chat-input-area input,
+.chat-input-area textarea {
+  background: #1e2a4a;
+  border: 1px solid #3a3a5a;
+  border-radius: 8px;
+  color: #e0e0e0;
+  flex: 1;
+  padding: 0.6rem 0.8rem;
+}
+
+.chat-input-area input:focus,
+.chat-input-area textarea:focus {
+  border-color: #5a7aba;
+  outline: none;
+}
+
+.chat-input-area button {
+  background: #3a5aba;
+  color: #fff;
+  border: none;
+  border-radius: 8px;
+  padding: 0.6rem 1.2rem;
+  cursor: pointer;
+}
+
+.chat-input-area button:disabled {
+  opacity: 0.5;
+  cursor: not-allowed;
+}
+
+/* ============================================================
+   TOOL CALL CARDS
+   ============================================================ */
+
+.tool-call-card {
+  background: #12192e;
+  border: 1px solid #2a2a4a;
+  border-radius: 8px;
+  padding: 0.6rem 0.8rem;
+  margin: 0.5rem 0;
+  font-size: 0.8rem;
+}
+
+.tool-name {
+  color: #7aa2f7;
+  font-weight: 600;
+  font-family: monospace;
+}
+
+.tool-args {
+  color: #8888aa;
+  font-family: monospace;
+  font-size: 0.75rem;
+  white-space: pre-wrap;
+  word-break: break-all;
+}
+
+.tool-status {
+  display: inline-block;
+  padding: 1px 6px;
+  border-radius: 4px;
+  font-size: 0.7rem;
+  margin-left: 0.5rem;
+}
+
+.tool-status.running {
+  background: #2a4a3a;
+  color: #7af7a2;
+}
+
+.tool-status.complete {
+  background: #2a3a4a;
+  color: #7aa2f7;
+}
+
+/* ============================================================
+   RIGHT PANEL TABS
+   ============================================================ */
+
+.right-panel-tabs {
+  display: flex;
+  border-bottom: 1px solid #2a2a4a;
+}
+
+.right-panel-tabs button {
+  flex: 1;
+  padding: 0.6rem;
+  background: transparent;
+  border: none;
+  border-bottom: 2px solid transparent;
+  color: #8888aa;
+  cursor: pointer;
+  font-size: 0.85rem;
+}
+
+.right-panel-tabs button.active {
+  color: #fff;
+  border-bottom-color: #5a7aba;
+}
+
+.right-panel-content {
+  flex: 1;
+  overflow-y: auto;
+}
+
+/* ============================================================
+   LOGIN PAGE
+   ============================================================ */
+
+.login-page {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  height: 100vh;
+  width: 100%;
+}
+
+.login-card {
+  background: #16213e;
+  border: 1px solid #2a2a4a;
+  border-radius: 12px;
+  padding: 2rem;
+  width: 360px;
+}
+
+.login-card input {
+  width: 100%;
+  padding: 0.6rem;
+  margin-bottom: 0.8rem;
+  background: #1e2a4a;
+  border: 1px solid #3a3a5a;
+  border-radius: 6px;
+  color: #e0e0e0;
+  font-size: 0.9rem;
+  box-sizing: border-box;
+}
+
+.login-card button {
+  width: 100%;
+  padding: 0.7rem;
+  background: #3a5aba;
+  color: #fff;
+  border: none;
+  border-radius: 6px;
+  cursor: pointer;
+}
+
+.error {
+  color: #f7607a;
+  font-size: 0.85rem;
+  text-align: center;
+}

tests/test_globals_css.py

@@ -0,0 +1,223 @@
+"""
+Tests for frontend/src/styles/globals.css
+
+Verifies the CSS file exists with all required selectors, imports, and styles
+as specified in task-3.
+"""
+
+import os
+import pytest
+
+CSS_FILE = os.path.join(
+    os.path.dirname(__file__),
+    "..",
+    "frontend",
+    "src",
+    "styles",
+    "globals.css",
+)
+
+
+@pytest.fixture(scope="module")
+def css_content():
+    assert os.path.exists(CSS_FILE), f"globals.css not found at {CSS_FILE}"
+    with open(CSS_FILE) as f:
+        return f.read()
+
+
+class TestTablerImports:
+    def test_imports_tabler_core_css(self, css_content):
+        assert "@tabler/core/dist/css/tabler.min.css" in css_content
+
+    def test_imports_tabler_vendors_css(self, css_content):
+        assert "tabler-vendors.min.css" in css_content
+
+
+class TestColorScheme:
+    def test_forces_dark_color_scheme(self, css_content):
+        assert "color-scheme: dark" in css_content
+
+
+class TestBodyStyles:
+    def test_body_background_color(self, css_content):
+        assert "#1a1a2e" in css_content
+
+    def test_body_text_color(self, css_content):
+        assert "#e0e0e0" in css_content
+
+    def test_body_margin_zero(self, css_content):
+        assert "margin: 0" in css_content
+
+    def test_body_overflow_hidden(self, css_content):
+        assert "overflow: hidden" in css_content
+
+    def test_body_height_100vh(self, css_content):
+        # body should have height: 100vh
+        assert "100vh" in css_content
+
+
+class TestRootStyles:
+    def test_root_height_100vh(self, css_content):
+        assert "#root" in css_content
+        assert "100vh" in css_content
+
+    def test_root_display_flex(self, css_content):
+        assert "#root" in css_content
+        assert "flex" in css_content
+
+
+class TestLayoutClasses:
+    def test_app_layout_class(self, css_content):
+        assert ".app-layout" in css_content
+
+    def test_sidebar_class(self, css_content):
+        assert ".sidebar" in css_content
+
+    def test_sidebar_width(self, css_content):
+        assert "240px" in css_content
+
+    def test_sidebar_background(self, css_content):
+        assert "#16213e" in css_content
+
+    def test_chat_panel_class(self, css_content):
+        assert ".chat-panel" in css_content
+
+    def test_right_panel_class(self, css_content):
+        assert ".right-panel" in css_content
+
+    def test_right_panel_width_45_percent(self, css_content):
+        assert "45%" in css_content
+
+    def test_right_panel_min_width(self, css_content):
+        assert "300px" in css_content
+
+
+class TestSidebarComponents:
+    def test_sidebar_header(self, css_content):
+        assert ".sidebar-header" in css_content
+
+    def test_session_list(self, css_content):
+        assert ".session-list" in css_content
+
+    def test_session_item(self, css_content):
+        assert ".session-item" in css_content
+
+    def test_session_item_hover(self, css_content):
+        assert ".session-item:hover" in css_content
+
+    def test_session_item_active(self, css_content):
+        assert ".session-item.active" in css_content
+
+    def test_session_meta(self, css_content):
+        assert ".session-meta" in css_content
+
+    def test_sidebar_h3_color(self, css_content):
+        assert "#8888aa" in css_content
+
+    def test_session_item_color(self, css_content):
+        assert "#c0c0d0" in css_content
+
+    def test_session_meta_color(self, css_content):
+        assert "#6a6a8a" in css_content
+
+
+class TestChatComponents:
+    def test_chat_messages_class(self, css_content):
+        assert ".chat-messages" in css_content
+
+    def test_chat_message_class(self, css_content):
+        assert ".chat-message" in css_content
+
+    def test_chat_message_max_width(self, css_content):
+        assert "85%" in css_content
+
+    def test_chat_message_user_class(self, css_content):
+        assert ".chat-message.user" in css_content
+
+    def test_chat_message_user_background(self, css_content):
+        assert "#2a3a6a" in css_content
+
+    def test_chat_message_assistant_class(self, css_content):
+        assert ".chat-message.assistant" in css_content
+
+    def test_chat_message_assistant_background(self, css_content):
+        assert "#1e2a4a" in css_content
+
+    def test_chat_input_area_class(self, css_content):
+        assert ".chat-input-area" in css_content
+
+    def test_chat_input_border_color(self, css_content):
+        assert "#3a3a5a" in css_content
+
+    def test_chat_input_focus_border(self, css_content):
+        assert "#5a7aba" in css_content
+
+    def test_chat_button_background(self, css_content):
+        assert "#3a5aba" in css_content
+
+
+class TestToolCallCards:
+    def test_tool_call_card_class(self, css_content):
+        assert ".tool-call-card" in css_content
+
+    def test_tool_call_card_background(self, css_content):
+        assert "#12192e" in css_content
+
+    def test_tool_name_class(self, css_content):
+        assert ".tool-name" in css_content
+
+    def test_tool_name_color(self, css_content):
+        assert "#7aa2f7" in css_content
+
+    def test_tool_args_class(self, css_content):
+        assert ".tool-args" in css_content
+
+    def test_tool_args_color(self, css_content):
+        assert "#8888aa" in css_content
+
+    def test_tool_status_class(self, css_content):
+        assert ".tool-status" in css_content
+
+    def test_tool_status_running(self, css_content):
+        assert ".running" in css_content
+
+    def test_tool_status_running_color(self, css_content):
+        assert "#7af7a2" in css_content
+
+    def test_tool_status_complete(self, css_content):
+        assert ".complete" in css_content
+
+    def test_tool_status_complete_color(self, css_content):
+        assert "#7aa2f7" in css_content
+
+
+class TestRightPanelTabs:
+    def test_right_panel_tabs_class(self, css_content):
+        assert ".right-panel-tabs" in css_content
+
+    def test_right_panel_content_class(self, css_content):
+        assert ".right-panel-content" in css_content
+
+
+class TestLoginPage:
+    def test_login_page_class(self, css_content):
+        assert ".login-page" in css_content
+
+    def test_login_card_class(self, css_content):
+        assert ".login-card" in css_content
+
+    def test_login_card_width(self, css_content):
+        assert "360px" in css_content
+
+    def test_login_card_background(self, css_content):
+        # Already tested via sidebar bg, but login card also uses #16213e
+        assert "#16213e" in css_content
+
+    def test_login_card_border_radius(self, css_content):
+        assert "12px" in css_content
+
+    def test_login_error_class(self, css_content):
+        assert ".error" in css_content
+
+    def test_login_error_color(self, css_content):
+        assert "#f7607a" in css_content