Update app.py

app.py

@@ -1384,57 +1384,112 @@ else:
         # LEGEND — UPDATED: Stable → One Time Event, Gray → Yellow
         # ===============================================================
         st.subheader("Hazard Gradient Legend")
-        st.markdown("""
-        <div class="legend-container">
-            <div class="legend-box">
-                <div class="legend-title">Worsening Trends (Positive Slope):</div>
-                <div class="legend-item">
-                    <div class="legend-color" style="background-color: #d32f2f;"></div>
-                    <span>Very High Worsening (≥1.5)</span>
-                </div>
-                <div class="legend-item">
-                    <div class="legend-color" style="background-color: #e57373;"></div>
-                    <span>High Worsening (1.0–1.5)</span>
-                </div>
-                <div class="legend-item">
-                    <div class="legend-color" style="background-color: #ef9a9a;"></div>
-                    <span>Moderate Worsening (0.5–1.0)</span>
-                </div>
-                <div class="legend-item">
-                    <div class="legend-color" style="background-color: #ffcdd2;"></div>
-                    <span>Slight Worsening (0–0.5)</span>
-                </div>
-            </div>
-            <div class="legend-box">
-                <div class="legend-title">Improving Trends (Negative Slope):</div>
-                <div class="legend-item">
-                    <div class="legend-color" style="background-color: #388e3c;"></div>
-                    <span>Excellent Improvement (≤−1.5)</span>
-                </div>
-                <div class="legend-item">
-                    <div class="legend-color" style="background-color: #81c784;"></div>
-                    <span>Great Improvement (−1.5 to −1.0)</span>
-                </div>
-                <div class="legend-item">
-                    <div class="legend-color" style="background-color: #a5d6a7;"></div>
-                    <span>Good Improvement (−1.0 to −0.5)</span>
-                </div>
-                <div class="legend-item">
-                    <div class="legend-color" style="background-color: #c8e6c9;"></div>
-                    <span>Slight Improvement (−0.5 to 0)</span>
-                </div>
-            </div>
-            <div class="legend-box">
-                <div class="legend-title">One-Time Events (Zero Slope):</div>
-                <div class="legend-item">
-                    <div class="legend-color" style="background-color: #FFD700;"></div>
-                    <span>One Time Event (0)</span>
-                </div>
-                <br>
-                <i>Note: Applies when an operator has data in only one week — slope is set to 0 by definition.</i>
-            </div>
+st.markdown("""
+<style>
+    .legend-container {
+        display: flex;
+        gap: 20px;
+        flex-wrap: wrap;
+    }
+    .legend-box {
+        background: #f9f9f9;
+        padding: 12px;
+        border-radius: 10px;
+        border: 1px solid #ddd;
+        width: 300px;
+    }
+    .legend-title {
+        font-weight: 700;
+        margin-bottom: 10px;
+        font-size: 14px;
+    }
+    .legend-item {
+        display: flex;
+        align-items: center;
+        margin-bottom: 6px;
+    }
+    .legend-color {
+        width: 18px;
+        height: 18px;
+        border-radius: 4px;
+        margin-right: 10px;
+    }
+</style>
+
+<div class="legend-container">
+
+    <!-- Worsening Trends -->
+    <div class="legend-box">
+        <div class="legend-title">Worsening Trends (Positive Slope):</div>
+
+        <div class="legend-item">
+            <div class="legend-color" style="background-color: #d32f2f;"></div>
+            <span>Very High Worsening (≥ 1.5)</span>
         </div>
-        """, unsafe_allow_html=True)
+
+        <div class="legend-item">
+            <div class="legend-color" style="background-color: #e57373;"></div>
+            <span>High Worsening (1.0 – 1.5)</span>
+        </div>
+
+        <div class="legend-item">
+            <div class="legend-color" style="background-color: #ef9a9a;"></div>
+            <span>Moderate Worsening (0.5 – 1.0)</span>
+        </div>
+
+        <div class="legend-item">
+            <div class="legend-color" style="background-color: #ffcdd2;"></div>
+            <span>Slight Worsening (0 – 0.5)</span>
+        </div>
+
+        <br>
+        <i>Note: Worsening trends indicate increasing fatigue frequency over weeks.</i>
+    </div>
+
+    <!-- Improving Trends -->
+    <div class="legend-box">
+        <div class="legend-title">Improving Trends (Negative Slope):</div>
+
+        <div class="legend-item">
+            <div class="legend-color" style="background-color: #388e3c;"></div>
+            <span>Excellent Improvement (≤ -1.5)</span>
+        </div>
+
+        <div class="legend-item">
+            <div class="legend-color" style="background-color: #81c784;"></div>
+            <span>Great Improvement (-1.5 to -1.0)</span>
+        </div>
+
+        <div class="legend-item">
+            <div class="legend-color" style="background-color: #a5d6a7;"></div>
+            <span>Good Improvement (-1.0 to -0.5)</span>
+        </div>
+
+        <div class="legend-item">
+            <div class="legend-color" style="background-color: #c8e6c9;"></div>
+            <span>Slight Improvement (-0.5 to 0)</span>
+        </div>
+
+        <br>
+        <i>Note: Improving trends indicate decreasing fatigue frequency over weeks.</i>
+    </div>
+
+    <!-- One-Time Events -->
+    <div class="legend-box">
+        <div class="legend-title">One-Time Events (Zero Slope):</div>
+
+        <div class="legend-item">
+            <div class="legend-color" style="background-color: #FFD700;"></div>
+            <span>One Time Event (0)</span>
+        </div>
+
+        <br>
+        <i>Note: Applies when an operator has data in only one week (slope = 0).</i>
+    </div>
+
+</div>
+""", unsafe_allow_html=True)
+
 
         # ===============================================================
         # PLOT FUNCTION — UPDATED: color for slope=0 is now #FFD700