<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#E4E3E3"
    tools:context=".MainActivity">

    <!-- Base CardView -->
    <androidx.cardview.widget.CardView
        android:id="@+id/base_cardview"
        style="@style/Base.CardView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.473"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.021">

        <!-- This is a ConstraintLayout for the entire CardView including the expandable portion -->
        <androidx.constraintlayout.widget.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:layout_constraintBottom_toBottomOf="@+id/base_cardview"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_bias="0.511"
            tools:layout_editor_absoluteX="-55dp">

            <!-- This is a ConstraintLayout for the fixed portion of the CardView. The elements that
            lie within the fixed portion of the CardView can be constrained to this layout -->
            <androidx.constraintlayout.widget.ConstraintLayout
                android:id="@+id/fixed_layout"
                android:layout_width="match_parent"
                android:layout_height="150dp"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.0"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                app:layout_constraintVertical_bias="0.0">

                <ImageView
                    android:id="@+id/icon"
                    android:layout_width="150dp"
                    android:layout_height="150dp"
                    android:src="@drawable/run"
                    app:layout_constraintBottom_toBottomOf="@+id/fixed_layout"
                    app:layout_constraintEnd_toEndOf="@+id/fixed_layout"
                    app:layout_constraintHorizontal_bias="0.0"
                    app:layout_constraintStart_toStartOf="@+id/fixed_layout"
                    app:layout_constraintTop_toTopOf="@+id/fixed_layout"
                    app:layout_constraintVertical_bias="1.0" />

                <TextView
                    android:id="@+id/heading"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="Run Tracker"
                    android:textColor="#006600"
                    android:textSize="25dp"
                    android:textStyle="bold"
                    app:layout_constraintBottom_toBottomOf="@+id/fixed_layout"
                    app:layout_constraintEnd_toEndOf="@+id/fixed_layout"
                    app:layout_constraintHorizontal_bias="0.926"
                    app:layout_constraintStart_toStartOf="@+id/fixed_layout"
                    app:layout_constraintTop_toTopOf="@+id/fixed_layout"
                    app:layout_constraintVertical_bias="0.198" />

                <TextView
                    android:id="@+id/list_of_details"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginTop="20dp"
                    android:layout_marginBottom="58dp"
                    android:text="Wed 2/1/2026"
                    android:textSize="20dp"
                    app:layout_constraintBottom_toBottomOf="@+id/fixed_layout"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintHorizontal_bias="0.878"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toBottomOf="@+id/heading"
                    app:layout_constraintVertical_bias="0.0" />

                <!-- This is ImageButton for the expansion icon -->
                <ImageButton
                    android:id="@+id/arrow_button"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:src="@drawable/more"
                    app:layout_constraintBottom_toBottomOf="@id/fixed_layout"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintHorizontal_bias="0.802"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toBottomOf="@+id/list_of_details"
                    app:layout_constraintVertical_bias="0.0" />

            </androidx.constraintlayout.widget.ConstraintLayout>

            <!-- The following is the expandable portion whose visibility is initially set to 'gone'
            The parent LinearLayout contains 3 child LinearLayouts that hold a subject name and an icon each -->
            <LinearLayout
                android:id="@+id/hidden_view"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="vertical"
                android:visibility="gone"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/fixed_layout">

                <!-- Child LinearLayout 1 -->
                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:orientation="horizontal">

                    <ImageView
                        android:layout_width="50dp"
                        android:layout_height="50dp"
                        android:layout_marginStart="20dp"
                        android:layout_marginTop="10dp"
                        android:layout_marginEnd="10dp"
                        android:layout_marginBottom="10dp"
                        android:src="@drawable/pace" />

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginStart="20dp"
                        android:layout_marginTop="20dp"
                        android:text="Average Pace: 12.5 MPH"
                        android:textColor="#000000"
                        android:textSize="20dp" />
                </LinearLayout>

                <!-- Child LinearLayout 2 -->
                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:orientation="horizontal">

                    <ImageView
                        android:layout_width="50dp"
                        android:layout_height="50dp"
                        android:layout_marginStart="20dp"
                        android:layout_marginTop="10dp"
                        android:layout_marginEnd="10dp"
                        android:layout_marginBottom="10dp"
                        android:src="@drawable/distance" />

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginStart="20dp"
                        android:layout_marginTop="20dp"
                        android:text="Distance: 13.1 miles"
                        android:textColor="#000000"
                        android:textSize="20dp" />
                </LinearLayout>

                <!-- Child LinearLayout 3 -->
                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:orientation="horizontal">

                    <ImageView
                        android:layout_width="50dp"
                        android:layout_height="50dp"
                        android:layout_marginStart="20dp"
                        android:layout_marginTop="10dp"
                        android:layout_marginEnd="10dp"
                        android:layout_marginBottom="10dp"
                        android:src="@drawable/time" />

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginStart="20dp"
                        android:layout_marginTop="20dp"
                        android:text="Time: 2.25 hrs"
                        android:textColor="#000000"
                        android:textSize="20dp" />
                </LinearLayout>
            </LinearLayout>

        </androidx.constraintlayout.widget.ConstraintLayout>
    </androidx.cardview.widget.CardView>
</androidx.constraintlayout.widget.ConstraintLayout>