NaMesa/app/src/main/res/layout/activity_detalhes_reservas.xml

<?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:id="@+id/detalhesReservasRoot"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#F7F7F7"
    tools:context=".DetalhesReservasActivity">

    <Button
        android:id="@+id/btnVoltar"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="16dp"
        android:layout_marginTop="16dp"
        android:text="Voltar"
        android:textAllCaps="false"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/txtTituloDetalhes"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Detalhes das reservas"
        android:textColor="#000"
        android:textSize="22sp"
        android:textStyle="bold"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toBottomOf="@id/btnVoltar"
        android:layout_marginTop="24dp" />

    <TextView
        android:id="@+id/txtDescricaoDetalhes"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginHorizontal="24dp"
        android:layout_marginTop="8dp"
        android:text="Selecione uma reserva para ver os detalhes e atualizar o estado."
        android:textColor="#4D4D4D"
        android:textSize="14sp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toBottomOf="@id/txtTituloDetalhes" />

    <ListView
        android:id="@+id/listReservas"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginStart="16dp"
        android:layout_marginEnd="16dp"
        android:layout_marginTop="16dp"
        android:divider="#E0E0E0"
        android:dividerHeight="1dp"
        app:layout_constraintTop_toBottomOf="@id/txtDescricaoDetalhes"
        app:layout_constraintBottom_toTopOf="@id/cardDetalhes"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent" />

    <androidx.cardview.widget.CardView
        android:id="@+id/cardDetalhes"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="16dp"
        android:layout_marginEnd="16dp"
        android:layout_marginBottom="16dp"
        app:cardBackgroundColor="#FFFFFF"
        app:cardCornerRadius="16dp"
        app:cardElevation="4dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical"
            android:padding="16dp">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Reserva selecionada"
                android:textColor="#000"
                android:textSize="16sp"
                android:textStyle="bold" />

            <TextView
                android:id="@+id/txtReservaInfo"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="6dp"
                android:text="Selecione uma reserva"
                android:textColor="#4D4D4D"
                android:textSize="14sp" />

            <TextView
                android:id="@+id/txtReservaNotas"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="4dp"
                android:text=""
                android:textColor="#4D4D4D"
                android:textSize="14sp" />

            <TextView
                android:id="@+id/txtReservaEstado"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="6dp"
                android:text="Estado:"
                android:textColor="#2E7D32"
                android:textSize="14sp"
                android:textStyle="bold" />

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="12dp"
                android:orientation="horizontal">

                <Button
                    android:id="@+id/btnConfirmarReserva"
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    android:layout_marginEnd="4dp"
                    android:layout_weight="1"
                    android:background="@drawable/btn_primary"
                    android:text="Confirmar"
                    android:textAllCaps="false"
                    android:textColor="#FFFFFF" />

                <Button
                    android:id="@+id/btnCancelarReserva"
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    android:layout_marginHorizontal="4dp"
                    android:layout_weight="1"
                    android:background="@drawable/btn_light_border"
                    android:text="Recusar"
                    android:textAllCaps="false"
                    android:textColor="#00001A" />

                <Button
                    android:id="@+id/btnApagarReserva"
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    android:layout_marginStart="4dp"
                    android:layout_weight="1"
                    android:background="@drawable/btn_light_border"
                    android:text="Apagar"
                    android:textAllCaps="false"
                    android:textColor="#C62828"
                    android:visibility="gone" />
            </LinearLayout>

            <TextView
                android:id="@+id/txtMensagemReserva"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="8dp"
                android:text=""
                android:textColor="#2E7D32"
                android:textSize="13sp" />
        </LinearLayout>
    </androidx.cardview.widget.CardView>

</androidx.constraintlayout.widget.ConstraintLayout>